mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGridViewCell.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
  21 //
  22 // Author:
  23 //      Pedro Martínez Juliá <pedromj@gmail.com>
  24 //      Ivan N. Zlatev  <contact@i-nz.net>
  25 //
  26
  27
  28 #if NET_2_0
  29
  30 using System;
  31 using System.Drawing;
  32 using System.ComponentModel;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Windows.Forms {
  36
  37         [TypeConverter (typeof (DataGridViewCellConverter))]
  38         public abstract class DataGridViewCell : DataGridViewElement, ICloneable, IDisposable
  39         {
  40                 private DataGridView dataGridViewOwner;
  41
  42                 private AccessibleObject accessibilityObject;
  43                 private int columnIndex;
  44                 private ContextMenuStrip contextMenuStrip;
  45                 private bool displayed;
  46                 private string errorText;
  47                 private bool isInEditMode;
  48                 private DataGridViewRow owningRow;
  49                 private DataGridViewTriState readOnly;
  50                 private bool selected;
  51                 private DataGridViewCellStyle style;
  52                 private object tag;
  53                 private string toolTipText;
  54                 private object valuex;
  55                 private Type valueType;
  56
  57                 protected DataGridViewCell ()
  58                 {
  59                         columnIndex = -1;
  60                         dataGridViewOwner = null;
  61                         errorText = string.Empty;
  62                 }
  63
  64                 ~DataGridViewCell ()
  65                 {
  66                         Dispose(false);
  67                 }
  68
  69                 [Browsable (false)]
  70                 public AccessibleObject AccessibilityObject {
  71                         get {
  72                                 if (accessibilityObject == null) {
  73                                         accessibilityObject = CreateAccessibilityInstance();
  74                                 }
  75                                 return accessibilityObject;
  76                         }
  77                 }
  78
  79                 public int ColumnIndex {
  80                         get {
  81                                 if (DataGridView == null)
  82                                         return -1;
  83                                 return columnIndex;
  84                         }
  85                 }
  86
  87                 [Browsable (false)]
  88                 public Rectangle ContentBounds {
  89                         get {
  90                                 return GetContentBounds (RowIndex);
  91                         }
  92                 }
  93
  94                 [DefaultValue (null)]
  95                 public virtual ContextMenuStrip ContextMenuStrip {
  96                         get { return contextMenuStrip; }
  97                         set { contextMenuStrip = value; }
  98                 }
  99
 100                 [Browsable (false)]
 101                 public virtual object DefaultNewRowValue {
 102                         get { return null; }
 103                 }
 104
 105                 [Browsable (false)]
 106                 public virtual bool Displayed {
 107                         get { return displayed; }
 108                 }
 109
 110                 [Browsable (false)]
 111                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 112                 public object EditedFormattedValue {
 113                         get {
 114                                 return GetEditedFormattedValue (RowIndex, DataGridViewDataErrorContexts.Formatting);
 115                         }
 116                 }
 117
 118                 [Browsable (false)]
 119                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 120                 public virtual Type EditType {
 121                         get {
 122                                 return typeof (DataGridViewTextBoxEditingControl);
 123                         }
 124                 }
 125
 126                 [Browsable (false)]
 127                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 128                 public Rectangle ErrorIconBounds {
 129                         get {
 130                                 if (this is DataGridViewTopLeftHeaderCell)
 131                                         return GetErrorIconBounds (null, null, RowIndex);
 132
 133                                 if (DataGridView == null || columnIndex < 0)
 134                                         throw new InvalidOperationException ();
 135                                 if (RowIndex < 0 || RowIndex >= DataGridView.Rows.Count)
 136                                         throw new ArgumentOutOfRangeException ("rowIndex", "Specified argument was out of the range of valid values.");
 137
 138                                 return GetErrorIconBounds (null, null, RowIndex);
 139                         }
 140                 }
 141
 142                 [Browsable (false)]
 143                 public string ErrorText {
 144                         get {
 145                                 if (this is DataGridViewTopLeftHeaderCell)
 146                                         return GetErrorText (-1);
 147
 148                                 if (OwningRow == null)
 149                                         return string.Empty;
 150
 151                                 return GetErrorText (OwningRow.Index);
 152                         }
 153                         set {
 154                                 if (errorText != value) {
 155                                         errorText = value;
 156                                         OnErrorTextChanged(new DataGridViewCellEventArgs(ColumnIndex, RowIndex));
 157                                 }
 158                         }
 159                 }
 160
 161                 [Browsable (false)]
 162                 public object FormattedValue {
 163                         get {
 164                                 if (DataGridView == null)
 165                                         return null;
 166
 167                                 DataGridViewCellStyle style = InheritedStyle;
 168                                 return GetFormattedValue (Value, RowIndex, ref style, null, null, DataGridViewDataErrorContexts.Formatting);
 169                         }
 170                 }
 171
 172                 [Browsable (false)]
 173                 public virtual Type FormattedValueType {
 174                         get { return null; }
 175                 }
 176
 177                 [Browsable (false)]
 178                 public virtual bool Frozen {
 179                         get {
 180                                 if (DataGridView == null)
 181                                         return false;
 182
 183                                 if (RowIndex >= 0)
 184                                         return OwningRow.Frozen && OwningColumn.Frozen;
 185
 186                                 return false;
 187                         }
 188                 }
 189
 190                 [Browsable (false)]
 191                 public bool HasStyle {
 192                         get { return style != null; }
 193                 }
 194
 195                 [Browsable (false)]
 196                 public DataGridViewElementStates InheritedState {
 197                         get {
 198                                 return GetInheritedState (RowIndex);
 199                         }
 200                 }
 201
 202                 [Browsable (false)]
 203                 public DataGridViewCellStyle InheritedStyle {
 204                         get {
 205                                 return GetInheritedStyle (null, RowIndex, true);
 206                         }
 207                 }
 208
 209                 [Browsable (false)]
 210                 public bool IsInEditMode {
 211                         get {
 212                                 if (DataGridView == null)
 213                                         return false;
 214
 215                                 if (RowIndex == -1)
 216                                         throw new InvalidOperationException ("Operation cannot be performed on a cell of a shared row.");
 217
 218                                 return isInEditMode;
 219                         }
 220                 }
 221
 222                 [Browsable (false)]
 223                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 224                 public DataGridViewColumn OwningColumn {
 225                         get {
 226                                 if (DataGridView == null || columnIndex == -1)
 227                                         return null;
 228
 229                                 return DataGridView.Columns[columnIndex];
 230                         }
 231                 }
 232
 233                 [Browsable (false)]
 234                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 235                 public DataGridViewRow OwningRow {
 236                         get { return owningRow; }
 237                 }
 238
 239                 [Browsable (false)]
 240                 public Size PreferredSize {
 241                         get {
 242                                 if (DataGridView == null)
 243                                         return new Size (-1, -1);
 244
 245                                 return GetPreferredSize (Hwnd.GraphicsContext, InheritedStyle, RowIndex, Size.Empty);
 246                         }
 247                 }
 248
 249                 [Browsable (false)]
 250                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 251                 public virtual bool ReadOnly {
 252                         get {
 253                                 if (DataGridView != null && DataGridView.ReadOnly)
 254                                         return true;
 255
 256                                 if (readOnly != DataGridViewTriState.NotSet)
 257                                         return readOnly == DataGridViewTriState.True;
 258
 259                                 if (OwningRow != null && !OwningRow.IsShared && OwningRow.ReadOnly)
 260                                         return true;
 261
 262                                 if (OwningColumn != null && OwningColumn.ReadOnly)
 263                                         return true;
 264
 265                                 return false;
 266                         }
 267                         set {
 268                                 readOnly = value ? DataGridViewTriState.True : DataGridViewTriState.False;
 269                                 if (value) {
 270                                         SetState (DataGridViewElementStates.ReadOnly | State);
 271                                 } else {
 272                                         SetState (~DataGridViewElementStates.ReadOnly & State);
 273                                 }
 274                         }
 275                 }
 276
 277                 [Browsable (false)]
 278                 public virtual bool Resizable {
 279                         get {
 280                                 if (DataGridView == null)
 281                                         return false;
 282
 283                                 // Shared cells aren't resizable
 284                                 if (RowIndex == -1 || columnIndex == -1)
 285                                         return false;
 286
 287                                 return OwningRow.Resizable == DataGridViewTriState.True || OwningColumn.Resizable == DataGridViewTriState.True;
 288                         }
 289                 }
 290
 291                 [Browsable (false)]
 292                 public int RowIndex {
 293                         get {
 294                                 if (owningRow == null) {
 295                                         return -1;
 296                                 }
 297                                 return owningRow.Index;
 298                         }
 299                 }
 300
 301                 [Browsable (false)]
 302                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 303                 public virtual bool Selected {
 304                         get {
 305                                 if (selected)
 306                                         return true;
 307
 308                                 if (DataGridView != null) {
 309                                         if (RowIndex >= 0 && RowIndex < DataGridView.Rows.Count && DataGridView.Rows [RowIndex].Selected)
 310                                                 return true;
 311
 312                                         if (ColumnIndex >= 0 && ColumnIndex < DataGridView.Columns.Count && DataGridView.Columns [ColumnIndex].Selected)
 313                                                 return true;
 314                                 }
 315
 316                                 return false;
 317                         }
 318                         set {
 319                                 selected = value;
 320
 321                                 if (value != ((State & DataGridViewElementStates.Selected) != 0)) {
 322                                         SetState(State ^ DataGridViewElementStates.Selected);
 323                                 }
 324
 325                                 // If our row is selected, unselect it and select
 326                                 // the first cell in it that isn't us
 327                                 if (!selected && OwningRow != null && OwningRow.Selected) {
 328                                         OwningRow.Selected = false;
 329
 330                                         if (columnIndex != 0 && OwningRow.Cells.Count > 0)
 331                                                 OwningRow.Cells[0].Selected = true;
 332                                         else if (OwningRow.Cells.Count > 1)
 333                                                 OwningRow.Cells[1].Selected = true;
 334                                 }
 335                         }
 336                 }
 337
 338                 [Browsable (false)]
 339                 public Size Size {
 340                         get {
 341                                 if (DataGridView == null)
 342                                         return new Size (-1, -1);
 343
 344                                 return GetSize (RowIndex);
 345                         }
 346                 }
 347
 348                 [Browsable (true)]
 349                 public DataGridViewCellStyle Style {
 350                         get {
 351                                 if (style == null) {
 352                                         style = new DataGridViewCellStyle();
 353                                         style.StyleChanged += OnStyleChanged;
 354                                 }
 355                                 return style;
 356                         }
 357                         set { style = value; }
 358                 }
 359
 360                 [Bindable (true, BindingDirection.OneWay)]
 361                 [DefaultValue (null)]
 362                 [Localizable (false)]
 363                 [TypeConverter ("System.ComponentModel.StringConverter, " + Consts.AssemblySystem)]
 364                 public object Tag {
 365                         get { return tag; }
 366                         set { tag = value; }
 367                 }
 368
 369                 [Browsable (false)]
 370                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 371                 public string ToolTipText {
 372                         get { return toolTipText == null ? string.Empty : toolTipText; }
 373                         set { toolTipText = value; }
 374                 }
 375
 376                 [Browsable (false)]
 377                 public object Value {
 378                         get {
 379                                 return GetValue (RowIndex);
 380                         }
 381                         set {
 382                                 SetValue (RowIndex, value);
 383                         }
 384                 }
 385
 386                 [Browsable (false)]
 387                 public virtual Type ValueType {
 388                         get { return valueType; }
 389                         set { valueType = value; }
 390                 }
 391
 392                 [Browsable (false)]
 393                 public virtual bool Visible {
 394                         get {
 395                                 // This is independent from State...
 396                                 DataGridViewColumn col = OwningColumn;
 397                                 DataGridViewRow row = OwningRow;
 398
 399                                 bool rowVisible = true, colVisible = true;
 400
 401                                 if (row == null && col == null)
 402                                         return false;
 403
 404                                 if (row != null) {
 405                                         rowVisible = !row.IsShared && row.Visible;
 406                                 }
 407
 408                                 if (col != null) {
 409                                         colVisible = col.Index >= 0 && col.Visible;
 410                                 }
 411
 412                                 return rowVisible && colVisible;
 413                         }
 414                 }
 415
 416                 internal override void SetState (DataGridViewElementStates state) {
 417                         base.SetState (state);
 418                         if (DataGridView != null)
 419                                 DataGridView.OnCellStateChangedInternal (new DataGridViewCellStateChangedEventArgs (this, state));
 420                 }
 421
 422                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 423                 public virtual DataGridViewAdvancedBorderStyle AdjustCellBorderStyle (DataGridViewAdvancedBorderStyle dataGridViewAdvancedBorderStyleInput,     DataGridViewAdvancedBorderStyle dataGridViewAdvancedBorderStylePlaceholder, bool singleVerticalBorderAdded, bool singleHorizontalBorderAdded, bool isFirstDisplayedColumn, bool isFirstDisplayedRow) {
 424                         return dataGridViewAdvancedBorderStyleInput;
 425                 }
 426
 427                 public virtual object Clone ()
 428                 {
 429                         DataGridViewCell result = (DataGridViewCell) Activator.CreateInstance (GetType ());
 430                         result.accessibilityObject = this.accessibilityObject;
 431                         result.columnIndex = this.columnIndex;
 432                         result.displayed = this.displayed;
 433                         result.errorText = this.errorText;
 434                         result.isInEditMode = this.isInEditMode;
 435                         result.owningRow = this.owningRow;
 436                         result.readOnly = this.readOnly;
 437                         result.selected = this.selected;
 438                         result.style = this.style;
 439                         result.tag = this.tag;
 440                         result.toolTipText = this.toolTipText;
 441                         result.valuex = this.valuex;
 442                         result.valueType = this.valueType;
 443                         return result;
 444                 }
 445
 446                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 447                 public virtual void DetachEditingControl ()
 448                 {
 449                 }
 450
 451                 public void Dispose ()
 452                 {
 453                 }
 454
 455                 public Rectangle GetContentBounds (int rowIndex)
 456                 {
 457                         if (DataGridView == null)
 458                                 return Rectangle.Empty;
 459
 460                         return GetContentBounds (Hwnd.GraphicsContext, InheritedStyle, rowIndex);
 461                 }
 462
 463                 public object GetEditedFormattedValue (int rowIndex, DataGridViewDataErrorContexts context)
 464                 {
 465                         if (DataGridView == null)
 466                                 return null;
 467
 468                         if (rowIndex < 0 || rowIndex >= DataGridView.RowCount)
 469                                 throw new ArgumentOutOfRangeException ("rowIndex", "Specified argument was out of the range of valid values.");
 470
 471                         // If we are in edit mode, this returns the value of the editing control
 472                         // If we aren't in edit mode, return the cell's value
 473                         // Basically, return what the user is currently seeing
 474                         if (IsInEditMode) {
 475                                 if (DataGridView.EditingControl != null)
 476                                         return (DataGridView.EditingControl as IDataGridViewEditingControl).GetEditingControlFormattedValue (context);
 477                                 else
 478                                         return (this as IDataGridViewEditingCell).GetEditingCellFormattedValue (context);
 479                         }
 480
 481                         DataGridViewCellStyle style = InheritedStyle;
 482
 483                         return GetFormattedValue (GetValue (rowIndex), rowIndex, ref style, null, null, context);
 484                 }
 485
 486                 public virtual ContextMenuStrip GetInheritedContextMenuStrip (int rowIndex)
 487                 {
 488                         if (DataGridView == null)
 489                                 return null;
 490
 491                         if (rowIndex < 0 || rowIndex >= DataGridView.Rows.Count)
 492                                 throw new ArgumentOutOfRangeException ("rowIndex");
 493                         if (columnIndex < 0)
 494                                 throw new InvalidOperationException ("cannot perform this on a column header cell");
 495
 496                         if (contextMenuStrip != null)
 497                                 return contextMenuStrip;
 498                         if (OwningRow.ContextMenuStrip != null)
 499                                 return OwningRow.ContextMenuStrip;
 500                         if (OwningColumn.ContextMenuStrip != null)
 501                                 return OwningColumn.ContextMenuStrip;
 502
 503                         return DataGridView.ContextMenuStrip;
 504                 }
 505
 506                 public virtual DataGridViewElementStates GetInheritedState (int rowIndex)
 507                 {
 508
 509                         if (DataGridView == null && rowIndex != -1)
 510                                 throw new ArgumentException ("msg?");
 511
 512                         if (DataGridView != null && (rowIndex < 0 || rowIndex >= DataGridView.Rows.Count))
 513                                 throw new ArgumentOutOfRangeException ("rowIndex", "Specified argument was out of the range of valid values.");
 514
 515                         DataGridViewElementStates result;
 516
 517                         result = DataGridViewElementStates.ResizableSet | State;
 518
 519                         DataGridViewColumn col = OwningColumn;
 520                         DataGridViewRow row = OwningRow;
 521
 522                         if (DataGridView == null) {
 523                                 if (row != null) {
 524                                         if (row.Resizable == DataGridViewTriState.True)
 525                                                 result |= DataGridViewElementStates.Resizable;
 526
 527                                         if (row.Visible)
 528                                                 result |= DataGridViewElementStates.Visible;
 529
 530                                         if (row.ReadOnly)
 531                                                 result |= DataGridViewElementStates.ReadOnly;
 532
 533                                         if (row.Frozen)
 534                                                 result |= DataGridViewElementStates.Frozen;
 535
 536                                         if (row.Displayed)
 537                                                 result |= DataGridViewElementStates.Displayed;
 538
 539                                         if (row.Selected)
 540                                                 result |= DataGridViewElementStates.Selected;
 541                                 }
 542
 543                                 return result;
 544                         }
 545
 546                         if (col != null) {
 547                                 if (col.Resizable == DataGridViewTriState.True && row.Resizable == DataGridViewTriState.True)
 548                                         result |= DataGridViewElementStates.Resizable;
 549
 550                                 if (col.Visible && row.Visible)
 551                                         result |= DataGridViewElementStates.Visible;
 552
 553                                 if (col.ReadOnly || row.ReadOnly)
 554                                         result |= DataGridViewElementStates.ReadOnly;
 555
 556                                 if (col.Frozen || row.Frozen)
 557                                         result |= DataGridViewElementStates.Frozen;
 558
 559                                 if (col.Displayed && row.Displayed)
 560                                         result |= DataGridViewElementStates.Displayed;
 561
 562                                 if (col.Selected || row.Selected)
 563                                         result |= DataGridViewElementStates.Selected;
 564                         }
 565
 566                         return result;
 567                 }
 568
 569                 public virtual DataGridViewCellStyle GetInheritedStyle (DataGridViewCellStyle inheritedCellStyle, int rowIndex, bool includeColors) {
 570                         /*
 571                          * System.InvalidOperationException :: The cell has no associated System.Windows.Forms.DataGridView, or the cell's System.Windows.Forms.DataGridViewCell.ColumnIndex is less than 0.
 572                          * System.ArgumentOutOfRangeException :: rowIndex is less than 0, or greater than or equal to the number of rows in the parent System.Windows.Forms.DataGridView.
 573                          * */
 574
 575                         if (DataGridView == null)
 576                                 throw new InvalidOperationException ("Cell is not in a DataGridView. The cell cannot retrieve the inherited cell style.");
 577
 578                         if (rowIndex < 0 || rowIndex >= DataGridView.Rows.Count)
 579                                 throw new ArgumentOutOfRangeException ("rowIndex");
 580
 581                         // Start with DataGridView.DefaultCellStyle
 582                         DataGridViewCellStyle result = new DataGridViewCellStyle (DataGridView.DefaultCellStyle);
 583
 584                         // If we have a column, add OwningColumn.DefaultCellStyle
 585                         if (OwningColumn != null)
 586                                 result.ApplyStyle (OwningColumn.DefaultCellStyle);
 587
 588                         // Add DataGridView.RowsDefaultCellStyle
 589                         result.ApplyStyle (DataGridView.RowsDefaultCellStyle);
 590
 591                         // If we are an odd row, add DataGridView.AlternatingRowsDefaultCellStyle
 592                         if (rowIndex % 2 == 1)
 593                                 result.ApplyStyle (DataGridView.AlternatingRowsDefaultCellStyle);
 594
 595                         // Add Row.DefaultCellStyle
 596                         result.ApplyStyle (DataGridView.Rows.SharedRow (rowIndex).DefaultCellStyle);
 597
 598                         // Add cell's style
 599                         if (HasStyle)
 600                                 result.ApplyStyle (Style);
 601
 602                         return result;
 603                 }
 604
 605                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 606                 public virtual void InitializeEditingControl (int rowIndex, object initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle) {
 607                         if (DataGridView == null || DataGridView.EditingControl == null) {
 608                                 throw new InvalidOperationException("No editing control defined");
 609                         }
 610                 }
 611
 612                 public virtual bool KeyEntersEditMode (KeyEventArgs e)
 613                 {
 614                         return false;
 615                 }
 616
 617                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 618                 public static int MeasureTextHeight (Graphics graphics, string text, Font font, int maxWidth, TextFormatFlags flags)
 619                 {
 620                         if (graphics == null)
 621                                 throw new ArgumentNullException ("Graphics argument null");
 622                         if (font == null)
 623                                 throw new ArgumentNullException ("Font argument null");
 624                         if (maxWidth < 1)
 625                                 throw new ArgumentOutOfRangeException ("maxWidth is less than 1.");
 626
 627                         return TextRenderer.MeasureText (graphics, text, font, new Size (maxWidth, 0), flags).Height;
 628                 }
 629
 630                 [MonoTODO ("does not use widthTruncated parameter")]
 631                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 632                 public static int MeasureTextHeight (Graphics graphics, string text, Font font, int maxWidth, TextFormatFlags flags, out bool widthTruncated)
 633                 {
 634                         widthTruncated = false;
 635                         return TextRenderer.MeasureText (graphics, text, font, new Size (maxWidth, 0), flags).Height;
 636                 }
 637
 638                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 639                 public static Size MeasureTextPreferredSize (Graphics graphics, string text, Font font, float maxRatio, TextFormatFlags flags)
 640                 {
 641                         if (graphics == null)
 642                                 throw new ArgumentNullException ("Graphics argument null");
 643                         if (font == null)
 644                                 throw new ArgumentNullException ("Font argument null");
 645                         if (maxRatio <= 0)
 646                                 throw new ArgumentOutOfRangeException ("maxRatio is less than or equals to 0.");
 647
 648                         // I couldn't find a case where maxRatio
 649                         // affected anything on MS
 650                         return MeasureTextSize (graphics, text, font, flags);
 651                 }
 652
 653                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 654                 public static Size MeasureTextSize (Graphics graphics, string text, Font font, TextFormatFlags flags)
 655                 {
 656                         return TextRenderer.MeasureText (graphics, text, font, Size.Empty, flags);
 657                 }
 658
 659                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 660                 public static int MeasureTextWidth (Graphics graphics, string text, Font font, int maxHeight, TextFormatFlags flags)
 661                 {
 662                         if (graphics == null)
 663                                 throw new ArgumentNullException ("Graphics argument null");
 664                         if (font == null)
 665                                 throw new ArgumentNullException ("Font argument null");
 666                         if (maxHeight < 1)
 667                                 throw new ArgumentOutOfRangeException ("maxHeight is less than 1.");
 668
 669                         return TextRenderer.MeasureText (graphics, text, font, new Size (0, maxHeight), flags).Width;
 670                 }
 671
 672                 public virtual object ParseFormattedValue (object formattedValue, DataGridViewCellStyle cellStyle, TypeConverter formattedValueTypeConverter, TypeConverter valueTypeConverter)
 673                 {
 674                         if (cellStyle == null)
 675                                 throw new ArgumentNullException ("cellStyle is null.");
 676                         if (FormattedValueType == null)
 677                                 throw new FormatException ("The System.Windows.Forms.DataGridViewCell.FormattedValueType property value is null.");
 678                         if (formattedValue == null)
 679                                 throw new ArgumentException ("formattedValue is null.");
 680                         if (ValueType == null)
 681                                 throw new FormatException ("valuetype is null");
 682                         if (!FormattedValueType.IsAssignableFrom (formattedValue.GetType ()))
 683                                 throw new ArgumentException ("formattedValue is not of formattedValueType.");
 684
 685                         if (formattedValueTypeConverter == null)
 686                                 formattedValueTypeConverter = FormattedValueTypeConverter;
 687                         if (valueTypeConverter == null)
 688                                 valueTypeConverter = ValueTypeConverter;
 689
 690                         if (valueTypeConverter != null && valueTypeConverter.CanConvertFrom (FormattedValueType))
 691                                 return valueTypeConverter.ConvertFrom (formattedValue);
 692                         if (formattedValueTypeConverter != null && formattedValueTypeConverter.CanConvertTo (ValueType))
 693                                 return formattedValueTypeConverter.ConvertTo (formattedValue, ValueType);
 694                         return Convert.ChangeType (formattedValue, ValueType);
 695                 }
 696
 697                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 698                 public virtual void PositionEditingControl (bool setLocation, bool setSize, Rectangle cellBounds, Rectangle cellClip, DataGridViewCellStyle cellStyle, bool singleVerticalBorderAdded, bool singleHorizontalBorderAdded, bool isFirstDisplayedColumn, bool isFirstDisplayedRow)
 699                 {
 700                         if (setLocation && setSize)
 701                                 DataGridView.EditingControl.Bounds = cellBounds;
 702                         else if (setLocation)
 703                                 DataGridView.EditingControl.Location = cellBounds.Location;
 704                         else if (setSize)
 705                                 DataGridView.EditingControl.Size = cellBounds.Size;
 706                 }
 707
 708                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 709                 public virtual Rectangle PositionEditingPanel (Rectangle cellBounds, Rectangle cellClip, DataGridViewCellStyle cellStyle, bool singleVerticalBorderAdded, bool singleHorizontalBorderAdded, bool isFirstDisplayedColumn, bool isFirstDisplayedRow) {
 710                         throw new NotImplementedException();
 711                 }
 712
 713                 public override string ToString () {
 714                         return String.Format("{0} {RowIndex = {1}, ColumnIndex = {2}}", this.GetType().FullName, RowIndex, columnIndex);
 715                 }
 716
 717                 protected virtual Rectangle BorderWidths (DataGridViewAdvancedBorderStyle advancedBorderStyle)
 718                 {
 719                         Rectangle r = Rectangle.Empty;
 720
 721                         r.X = BorderToWidth (advancedBorderStyle.Left);
 722                         r.Y = BorderToWidth (advancedBorderStyle.Top);
 723                         r.Width = BorderToWidth (advancedBorderStyle.Right);
 724                         r.Height = BorderToWidth (advancedBorderStyle.Bottom);
 725
 726                         if (OwningColumn != null)
 727                                 r.Width += OwningColumn.DividerWidth;
 728                         if (OwningRow != null)
 729                                 r.Height += OwningRow.DividerHeight;
 730
 731                         return r;
 732                 }
 733
 734                 private int BorderToWidth (DataGridViewAdvancedCellBorderStyle style)
 735                 {
 736                         switch (style) {
 737                                 case DataGridViewAdvancedCellBorderStyle.None:
 738                                         return 0;
 739                                 case DataGridViewAdvancedCellBorderStyle.NotSet:
 740                                 case DataGridViewAdvancedCellBorderStyle.Single:
 741                                 case DataGridViewAdvancedCellBorderStyle.Inset:
 742                                 case DataGridViewAdvancedCellBorderStyle.Outset:
 743                                 case DataGridViewAdvancedCellBorderStyle.OutsetPartial:
 744                                 default:
 745                                         return 1;
 746                                 case DataGridViewAdvancedCellBorderStyle.InsetDouble:
 747                                 case DataGridViewAdvancedCellBorderStyle.OutsetDouble:
 748                                         return 2;
 749                         }
 750                 }
 751
 752                 protected virtual bool ClickUnsharesRow (DataGridViewCellEventArgs e)
 753                 {
 754                         return false;
 755                 }
 756
 757                 protected virtual bool ContentClickUnsharesRow (DataGridViewCellEventArgs e)
 758                 {
 759                         return false;
 760                 }
 761
 762                 protected virtual bool ContentDoubleClickUnsharesRow (DataGridViewCellEventArgs e)
 763                 {
 764                         return false;
 765                 }
 766
 767                 protected virtual AccessibleObject CreateAccessibilityInstance () {
 768                         return new DataGridViewCellAccessibleObject(this);
 769                 }
 770
 771                 protected virtual void Dispose (bool disposing) {
 772                 }
 773
 774                 protected virtual bool DoubleClickUnsharesRow (DataGridViewCellEventArgs e)
 775                 {
 776                         return false;
 777                 }
 778
 779                 protected virtual bool EnterUnsharesRow (int rowIndex, bool throughMouseClick)
 780                 {
 781                         return false;
 782                 }
 783
 784                 protected virtual object GetClipboardContent (int rowIndex, bool firstCell, bool lastCell, bool inFirstRow, bool inLastRow, string format) {
 785                         if (DataGridView == null)
 786                                 return null;
 787
 788                         if (rowIndex < 0 || rowIndex >= DataGridView.RowCount)
 789                                 throw new ArgumentOutOfRangeException ("rowIndex", "Specified argument was out of the range of valid values.");
 790
 791                         string value = null;
 792
 793                         if (Selected) {
 794                                 DataGridViewCellStyle style = GetInheritedStyle (null, rowIndex, false);
 795                                 value = GetEditedFormattedValue (rowIndex, DataGridViewDataErrorContexts.ClipboardContent | DataGridViewDataErrorContexts.Formatting) as string;
 796                         }
 797
 798                         if (value == null)
 799                                 value = string.Empty;
 800
 801                         string table_prefix = string.Empty, cell_prefix = string.Empty, row_prefix = string.Empty;
 802                         string table_suffix = string.Empty, cell_suffix = string.Empty, row_suffix = string.Empty;
 803
 804                         if (format == DataFormats.UnicodeText || format == DataFormats.Text) {
 805                                 if (lastCell && !inLastRow)
 806                                         cell_suffix = Environment.NewLine;
 807                                 else if (!lastCell)
 808                                         cell_suffix = "\t";
 809                         } else if (format == DataFormats.CommaSeparatedValue) {
 810                                 if (lastCell && !inLastRow)
 811                                         cell_suffix = Environment.NewLine;
 812                                 else if (!lastCell)
 813                                         cell_suffix = ",";
 814                         } else if (format == DataFormats.Html) {
 815                                 if (inFirstRow && firstCell)
 816                                         table_prefix = "<TABLE>";
 817                                 if (inLastRow && lastCell)
 818                                         table_suffix = "</TABLE>";
 819                                 if (firstCell)
 820                                         row_prefix = "<TR>";
 821                                 if (lastCell)
 822                                         row_suffix = "</TR>";
 823                                 cell_prefix = "<TD>";
 824                                 cell_suffix = "</TD>";
 825
 826                                 if (!Selected) {
 827                                         value = "&nbsp;";
 828                                 }
 829                         } else {
 830                                 return value;
 831                         }
 832
 833                         value = table_prefix + row_prefix + cell_prefix + value + cell_suffix + row_suffix + table_suffix;
 834
 835                         return value;
 836                 }
 837
 838                 internal object GetClipboardContentInternal (int rowIndex, bool firstCell, bool lastCell, bool inFirstRow, bool inLastRow, string format) {
 839                         return GetClipboardContent (rowIndex, firstCell, lastCell, inFirstRow, inLastRow, format);
 840                 }
 841
 842                 protected virtual Rectangle GetContentBounds (Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex) {
 843                         return Rectangle.Empty;
 844                 }
 845
 846                 protected virtual Rectangle GetErrorIconBounds (Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex)
 847                 {
 848                         return Rectangle.Empty;
 849                 }
 850
 851                 protected internal virtual string GetErrorText (int rowIndex)
 852                 {
 853                         return errorText;
 854                 }
 855
 856                 protected virtual object GetFormattedValue (object value, int rowIndex, ref DataGridViewCellStyle cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context)
 857                 {
 858                         if (DataGridView == null)
 859                                 return null;
 860
 861                         if (rowIndex < 0 || rowIndex >= DataGridView.RowCount)
 862                                 throw new ArgumentOutOfRangeException ("rowIndex");
 863
 864                         // Give the user a chance to custom format
 865                         if (!(this is DataGridViewRowHeaderCell)) {
 866                                 DataGridViewCellFormattingEventArgs e = new DataGridViewCellFormattingEventArgs (ColumnIndex, rowIndex, value, FormattedValueType, cellStyle);
 867                                 DataGridView.OnCellFormattingInternal (e);
 868
 869                                 if (e.FormattingApplied)
 870                                         return e.Value;
 871
 872                                 cellStyle = e.CellStyle;
 873                                 value = e.Value;
 874                         }
 875
 876                         if (formattedValueTypeConverter == null)
 877                                 formattedValueTypeConverter = FormattedValueTypeConverter;
 878                         if (valueTypeConverter == null)
 879                                 valueTypeConverter = ValueTypeConverter;
 880
 881                         if (valueTypeConverter != null && valueTypeConverter.CanConvertTo (FormattedValueType))
 882                                 return valueTypeConverter.ConvertTo (value, FormattedValueType);
 883                         if (formattedValueTypeConverter != null && formattedValueTypeConverter.CanConvertFrom (ValueType))
 884                                 return formattedValueTypeConverter.ConvertFrom (value);
 885
 886                         return Convert.ChangeType (value, FormattedValueType);
 887                 }
 888
 889                 protected virtual Size GetPreferredSize (Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex, Size constraintSize)
 890                 {
 891                         return new Size (-1, -1);
 892                 }
 893
 894                 protected virtual Size GetSize (int rowIndex)
 895                 {
 896                         if (RowIndex == -1)
 897                                 throw new InvalidOperationException ("Getting the Size property of a cell in a shared row is not a valid operation.");
 898
 899                         return new Size (OwningColumn.Width, OwningRow.Height);
 900                 }
 901
 902                 protected virtual object GetValue (int rowIndex) {
 903                         if (DataGridView != null && (RowIndex < 0 || RowIndex >= DataGridView.Rows.Count))
 904                                 throw new ArgumentOutOfRangeException ("rowIndex", "Specified argument was out of the range of valid values.");
 905
 906                         if (DataProperty != null)
 907                                 return DataProperty.GetValue (OwningRow.DataBoundItem);
 908
 909                         if (valuex != null)
 910                                 return valuex;
 911
 912                         DataGridViewCellValueEventArgs dgvcvea = new DataGridViewCellValueEventArgs (columnIndex, rowIndex);
 913                         if (DataGridView != null)
 914                                 DataGridView.OnCellValueNeeded (dgvcvea);
 915                         return dgvcvea.Value;
 916                 }
 917
 918                 private PropertyDescriptor DataProperty {
 919                         get {
 920                                 if (OwningColumn != null && !String.IsNullOrEmpty (OwningColumn.DataPropertyName) &&
 921                                     OwningRow != null && OwningRow.DataBoundItem != null)
 922                                         return TypeDescriptor.GetProperties (OwningRow.DataBoundItem)[OwningColumn.DataPropertyName];
 923                                 return null;
 924                         }
 925                 }
 926
 927                 private TypeConverter FormattedValueTypeConverter {
 928                         get {
 929                                 if (FormattedValueType != null)
 930                                         return TypeDescriptor.GetConverter (FormattedValueType);
 931                                 return null;
 932                         }
 933                 }
 934
 935                 private TypeConverter ValueTypeConverter {
 936                         get {
 937                                 if (DataProperty != null && DataProperty.Converter != null)
 938                                         return DataProperty.Converter;
 939                                 if (Value != null)
 940                                         return TypeDescriptor.GetConverter (Value);
 941                                 if (ValueType != null)
 942                                         return TypeDescriptor.GetConverter (ValueType);
 943                                 return null;
 944                         }
 945                 }
 946
 947                 protected virtual bool KeyDownUnsharesRow (KeyEventArgs e, int rowIndex)
 948                 {
 949                         return false;
 950                 }
 951
 952                 protected virtual bool KeyPressUnsharesRow (KeyPressEventArgs e, int rowIndex)
 953                 {
 954                         return false;
 955                 }
 956
 957                 protected virtual bool KeyUpUnsharesRow (KeyEventArgs e, int rowIndex)
 958                 {
 959                         return false;
 960                 }
 961
 962                 protected virtual bool LeaveUnsharesRow (int rowIndex, bool throughMouseClick)
 963                 {
 964                         return false;
 965                 }
 966
 967                 protected virtual bool MouseClickUnsharesRow (DataGridViewCellMouseEventArgs e)
 968                 {
 969                         return false;
 970                 }
 971
 972                 protected virtual bool MouseDoubleClickUnsharesRow (DataGridViewCellMouseEventArgs e)
 973                 {
 974                         return false;
 975                 }
 976
 977                 protected virtual bool MouseDownUnsharesRow (DataGridViewCellMouseEventArgs e)
 978                 {
 979                         return false;
 980                 }
 981
 982                 protected virtual bool MouseEnterUnsharesRow (int rowIndex)
 983                 {
 984                         return false;
 985                 }
 986
 987                 protected virtual bool MouseLeaveUnsharesRow (int rowIndex)
 988                 {
 989                         return false;
 990                 }
 991
 992                 protected virtual bool MouseMoveUnsharesRow (DataGridViewCellMouseEventArgs e)
 993                 {
 994                         return false;
 995                 }
 996
 997                 protected virtual bool MouseUpUnsharesRow (DataGridViewCellMouseEventArgs e)
 998                 {
 999                         return false;
1000                 }
1001
1002                 protected virtual void OnClick (DataGridViewCellEventArgs e) {
1003                 }
1004
1005                 internal void OnClickInternal (DataGridViewCellEventArgs e) {
1006                         OnClick (e);
1007                 }
1008
1009                 protected virtual void OnContentClick (DataGridViewCellEventArgs e) {
1010                 }
1011
1012                 internal void OnContentClickInternal (DataGridViewCellEventArgs e) {
1013                         OnContentClick (e);
1014                 }
1015
1016                 protected virtual void OnContentDoubleClick (DataGridViewCellEventArgs e) {
1017                 }
1018
1019                 internal void OnContentDoubleClickInternal (DataGridViewCellEventArgs e) {
1020                         OnContentDoubleClick (e);
1021                 }
1022
1023                 protected override void OnDataGridViewChanged () {
1024                 }
1025
1026                 internal void OnDataGridViewChangedInternal () {
1027                         OnDataGridViewChanged ();
1028                 }
1029
1030                 protected virtual void OnDoubleClick (DataGridViewCellEventArgs e) {
1031                 }
1032
1033                 internal void OnDoubleClickInternal (DataGridViewCellEventArgs e) {
1034                         OnDoubleClick (e);
1035                 }
1036
1037                 protected virtual void OnEnter (int rowIndex, bool throughMouseClick) {
1038                 }
1039
1040                 internal void OnEnterInternal (int rowIndex, bool throughMouseClick) {
1041                         OnEnter (rowIndex, throughMouseClick);
1042                 }
1043
1044                 protected virtual void OnKeyDown (KeyEventArgs e, int rowIndex) {
1045                 }
1046
1047                 internal void OnKeyDownInternal (KeyEventArgs e, int rowIndex) {
1048                         OnKeyDown (e, rowIndex);
1049                 }
1050
1051                 protected virtual void OnKeyPress (KeyPressEventArgs e, int rowIndex) {
1052                 }
1053
1054                 internal void OnKeyPressInternal (KeyPressEventArgs e, int rowIndex) {
1055                         OnKeyPress (e, rowIndex);
1056                 }
1057
1058                 protected virtual void OnKeyUp (KeyEventArgs e, int rowIndex) {
1059                 }
1060
1061                 internal void OnKeyUpInternal (KeyEventArgs e, int rowIndex) {
1062                         OnKeyUp (e, rowIndex);
1063                 }
1064
1065                 protected virtual void OnLeave (int rowIndex, bool throughMouseClick) {
1066                 }
1067
1068                 internal void OnLeaveInternal (int rowIndex, bool throughMouseClick) {
1069                         OnLeave (rowIndex, throughMouseClick);
1070                 }
1071
1072                 protected virtual void OnMouseClick (DataGridViewCellMouseEventArgs e) {
1073                 }
1074
1075                 internal void OnMouseClickInternal (DataGridViewCellMouseEventArgs e) {
1076                         OnMouseClick (e);
1077                 }
1078
1079                 protected virtual void OnMouseDoubleClick (DataGridViewCellMouseEventArgs e) {
1080                 }
1081
1082                 internal void OnMouseDoubleClickInternal (DataGridViewCellMouseEventArgs e) {
1083                         OnMouseDoubleClick (e);
1084                 }
1085
1086                 protected virtual void OnMouseDown (DataGridViewCellMouseEventArgs e) {
1087                 }
1088
1089                 internal void OnMouseDownInternal (DataGridViewCellMouseEventArgs e) {
1090                         OnMouseDown (e);
1091                 }
1092
1093                 protected virtual void OnMouseEnter (int rowIndex) {
1094                 }
1095
1096                 internal void OnMouseEnterInternal (int rowIndex) {
1097                         OnMouseEnter (rowIndex) ;
1098                 }
1099
1100                 protected virtual void OnMouseLeave (int rowIndex) {
1101                 }
1102
1103                 internal void OnMouseLeaveInternal (int e) {
1104                         OnMouseLeave (e);
1105                 }
1106
1107                 protected virtual void OnMouseMove (DataGridViewCellMouseEventArgs e) {
1108                 }
1109
1110                 internal void OnMouseMoveInternal (DataGridViewCellMouseEventArgs e) {
1111                         OnMouseMove (e);
1112                 }
1113
1114                 protected virtual void OnMouseUp (DataGridViewCellMouseEventArgs e) {
1115                 }
1116
1117                 internal void OnMouseUpInternal (DataGridViewCellMouseEventArgs e) {
1118                         OnMouseUp (e);
1119                 }
1120
1121                 internal void PaintInternal (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
1122                 {
1123                         Paint (graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
1124                 }
1125
1126                 protected virtual void Paint (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
1127                 {
1128                         if ((paintParts & DataGridViewPaintParts.Background) == DataGridViewPaintParts.Background)
1129                                 PaintPartBackground (graphics, cellBounds, cellStyle);
1130                         if ((paintParts & DataGridViewPaintParts.SelectionBackground) == DataGridViewPaintParts.SelectionBackground)
1131                                 PaintPartSelectionBackground (graphics, cellBounds, cellState, cellStyle);
1132                         if ((paintParts & DataGridViewPaintParts.ContentForeground) == DataGridViewPaintParts.ContentForeground)
1133                                 PaintPartContent (graphics, cellBounds, rowIndex, cellState, cellStyle, formattedValue);
1134                         if ((paintParts & DataGridViewPaintParts.Border) == DataGridViewPaintParts.Border)
1135                                 PaintBorder (graphics, clipBounds, cellBounds, cellStyle, advancedBorderStyle);
1136                         if ((paintParts & DataGridViewPaintParts.Focus) == DataGridViewPaintParts.Focus)
1137                                 PaintPartFocus (graphics, cellBounds);
1138                         if ((paintParts & DataGridViewPaintParts.ErrorIcon) == DataGridViewPaintParts.ErrorIcon)
1139                                 if (!string.IsNullOrEmpty (ErrorText))
1140                                         PaintErrorIcon (graphics, clipBounds, cellBounds, ErrorText);
1141                 }
1142
1143                 protected virtual void PaintBorder (Graphics graphics, Rectangle clipBounds, Rectangle bounds, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle)
1144                 {
1145                         Pen pen = new Pen (DataGridView.GridColor);
1146
1147                         // Paint the left border, if any
1148                         switch (advancedBorderStyle.Left) {
1149                                 case DataGridViewAdvancedCellBorderStyle.Single:
1150                                         if (DataGridView.CellBorderStyle != DataGridViewCellBorderStyle.Single)
1151                                                 graphics.DrawLine (pen, bounds.X, bounds.Y, bounds.X, bounds.Y + bounds.Height - 1);
1152                                         break;
1153                                 case DataGridViewAdvancedCellBorderStyle.Inset:
1154                                         graphics.DrawLine(pen, bounds.X, bounds.Y, bounds.X, bounds.Y + bounds.Height - 1);
1155                                         break;
1156                                 case DataGridViewAdvancedCellBorderStyle.InsetDouble:
1157                                 case DataGridViewAdvancedCellBorderStyle.Outset:
1158                                 case DataGridViewAdvancedCellBorderStyle.OutsetDouble:
1159                                         graphics.DrawLine(pen, bounds.X, bounds.Y, bounds.X, bounds.Y + bounds.Height - 1);
1160                                         graphics.DrawLine(pen, bounds.X + 2, bounds.Y, bounds.X + 2, bounds.Y + bounds.Height - 1);
1161                                         break;
1162                         }
1163
1164                         // Paint the right border, if any
1165                         switch (advancedBorderStyle.Right) {
1166                                 case DataGridViewAdvancedCellBorderStyle.Single:
1167                                         graphics.DrawLine(pen, bounds.X + bounds.Width - 1, bounds.Y, bounds.X + bounds.Width - 1, bounds.Y + bounds.Height - 1);
1168                                         break;
1169                                 case DataGridViewAdvancedCellBorderStyle.Inset:
1170                                         graphics.DrawLine(pen, bounds.X + bounds.Width, bounds.Y, bounds.X + bounds.Width, bounds.Y + bounds.Height - 1);
1171                                         break;
1172                         }
1173
1174                         // Paint the top border, if any
1175                         switch (advancedBorderStyle.Top) {
1176                                 case DataGridViewAdvancedCellBorderStyle.Single:
1177                                         if (DataGridView.CellBorderStyle != DataGridViewCellBorderStyle.Single)
1178                                                 graphics.DrawLine(pen, bounds.X, bounds.Y, bounds.X + bounds.Width - 1, bounds.Y);
1179                                         break;
1180                                 case DataGridViewAdvancedCellBorderStyle.Inset:
1181                                         graphics.DrawLine(pen, bounds.X, bounds.Y, bounds.X + bounds.Width - 1, bounds.Y);
1182                                         break;
1183                         }
1184
1185                         // Paint the bottom border, if any
1186                         switch (advancedBorderStyle.Bottom) {
1187                                 case DataGridViewAdvancedCellBorderStyle.Single:
1188                                         graphics.DrawLine(pen, bounds.X, bounds.Y + bounds.Height - 1, bounds.X + bounds.Width - 1, bounds.Y + bounds.Height - 1);
1189                                         break;
1190                         }
1191                 }
1192
1193                 protected virtual void PaintErrorIcon (Graphics graphics, Rectangle clipBounds, Rectangle cellValueBounds, string errorText)
1194                 {
1195                         Rectangle error_bounds = GetErrorIconBounds (graphics, null, RowIndex);
1196
1197                         if (error_bounds.IsEmpty)
1198                                 return;
1199
1200                         Point loc = error_bounds.Location;
1201                         loc.X += cellValueBounds.Left;
1202                         loc.Y += cellValueBounds.Top;
1203
1204                         graphics.FillRectangle (Brushes.Red, new Rectangle (loc.X + 1, loc.Y + 2, 10, 7));
1205                         graphics.FillRectangle (Brushes.Red, new Rectangle (loc.X + 2, loc.Y + 1, 8, 9));
1206                         graphics.FillRectangle (Brushes.Red, new Rectangle (loc.X + 4, loc.Y, 4, 11));
1207                         graphics.FillRectangle (Brushes.Red, new Rectangle (loc.X, loc.Y + 4, 12, 3));
1208
1209                         graphics.FillRectangle (Brushes.White, new Rectangle (loc.X + 5, loc.Y + 2, 2, 4));
1210                         graphics.FillRectangle (Brushes.White, new Rectangle (loc.X + 5, loc.Y + 7, 2, 2));
1211                 }
1212
1213                 internal virtual void PaintPartBackground (Graphics graphics, Rectangle cellBounds, DataGridViewCellStyle style)
1214                 {
1215                         Color color = style.BackColor;
1216                         graphics.FillRectangle (ThemeEngine.Current.ResPool.GetSolidBrush (color), cellBounds);
1217                 }
1218
1219                 internal Pen GetBorderPen ()
1220                 {
1221                         return ThemeEngine.Current.ResPool.GetPen (DataGridView.GridColor);
1222                 }
1223
1224                 internal virtual void PaintPartContent (Graphics graphics, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, DataGridViewCellStyle cellStyle, object formattedValue)
1225                 {
1226                         if (IsInEditMode)
1227                                 return;
1228
1229                         Color color = Selected ? cellStyle.SelectionForeColor : cellStyle.ForeColor;
1230
1231                         TextFormatFlags flags = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter | TextFormatFlags.TextBoxControl;
1232                         flags |= AlignmentToFlags (style.Alignment);
1233
1234                         cellBounds.Height -= 2;
1235                         cellBounds.Width -= 2;
1236
1237                         if (formattedValue != null)
1238                                 TextRenderer.DrawText (graphics, formattedValue.ToString (), cellStyle.Font, cellBounds, color, flags);
1239                 }
1240
1241                 private void PaintPartFocus (Graphics graphics, Rectangle cellBounds)
1242                 {
1243                         cellBounds.Width--;
1244                         cellBounds.Height--;
1245
1246                         if (DataGridView.ShowFocusCues && DataGridView.CurrentCell == this && DataGridView.Focused)
1247                                 ControlPaint.DrawFocusRectangle (graphics, cellBounds);
1248                 }
1249
1250                 internal virtual void PaintPartSelectionBackground (Graphics graphics, Rectangle cellBounds, DataGridViewElementStates cellState, DataGridViewCellStyle cellStyle)
1251                 {
1252                         if ((cellState & DataGridViewElementStates.Selected) != DataGridViewElementStates.Selected)
1253                                 return;
1254
1255                         if (RowIndex >= 0 && IsInEditMode && EditType != null)
1256                                 return;
1257
1258                         Color color = cellStyle.SelectionBackColor;
1259                         graphics.FillRectangle (ThemeEngine.Current.ResPool.GetSolidBrush (color), cellBounds);
1260                 }
1261
1262                 internal void PaintWork (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
1263                 {
1264                         object value;
1265                         object formattedvalue;
1266
1267                         if (RowIndex == -1 && !(this is DataGridViewColumnHeaderCell)) {
1268                                 value = null;
1269                                 formattedvalue = null;
1270                         } else if (RowIndex == -1) {
1271                                 value = Value;
1272                                 formattedvalue = Value;
1273                         } else {
1274                                 value = Value;
1275                                 formattedvalue = GetFormattedValue (Value, rowIndex, ref cellStyle, null, null, DataGridViewDataErrorContexts.Formatting);
1276                         }
1277
1278                         DataGridViewCellPaintingEventArgs pea = new DataGridViewCellPaintingEventArgs (DataGridView, graphics, clipBounds, cellBounds, rowIndex, columnIndex, cellState, value, formattedvalue, ErrorText, cellStyle, advancedBorderStyle, paintParts);
1279                         DataGridView.OnCellPaintingInternal (pea);
1280
1281                         if (pea.Handled)
1282                                 return;
1283
1284                         pea.Paint (pea.ClipBounds, pea.PaintParts);
1285                 }
1286
1287                 protected virtual bool SetValue (int rowIndex, object value)
1288                 {
1289                         object oldValue = this.Value;
1290
1291                         if (DataProperty != null && !DataProperty.IsReadOnly)
1292                                 DataProperty.SetValue (OwningRow.DataBoundItem, value);
1293                         else
1294                                 valuex = value;
1295
1296                         if (oldValue != value) {
1297                                 RaiseCellValueChanged (new DataGridViewCellEventArgs (ColumnIndex, RowIndex));
1298
1299                                 // Set this dirty flag back to false
1300                                 if (this is IDataGridViewEditingCell)
1301                                         (this as IDataGridViewEditingCell).EditingCellValueChanged = false;
1302
1303                                 if (DataGridView != null)
1304                                         DataGridView.InvalidateCell (this);
1305
1306                                 return true;
1307                         }
1308                         return false;
1309                 }
1310
1311                 private void OnStyleChanged (object sender, EventArgs args) {
1312                         if (DataGridView != null) {
1313                                 DataGridView.RaiseCellStyleChanged(new DataGridViewCellEventArgs(ColumnIndex, RowIndex));
1314                         }
1315                 }
1316
1317                 internal virtual Rectangle InternalErrorIconsBounds {
1318                         get { return GetErrorIconBounds (null, null, -1); }
1319                 }
1320
1321                 internal void InternalPaint (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts) {
1322                         Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
1323                 }
1324
1325                 internal void SetOwningRow (DataGridViewRow row) {
1326                         owningRow = row;
1327                 }
1328
1329                 internal void SetOwningColumn (DataGridViewColumn col) {
1330                         columnIndex = col.Index;
1331                 }
1332
1333                 internal void SetColumnIndex (int index) {
1334                         columnIndex = index;
1335                 }
1336
1337                 internal void SetIsInEditMode (bool isInEditMode) {
1338                         this.isInEditMode = isInEditMode;
1339                 }
1340
1341                 internal void OnErrorTextChanged (DataGridViewCellEventArgs args) {
1342                         if (DataGridView != null) {
1343                                 DataGridView.OnCellErrorTextChanged(args);
1344                         }
1345                 }
1346
1347                 internal TextFormatFlags AlignmentToFlags (DataGridViewContentAlignment align)
1348                 {
1349                         TextFormatFlags flags = TextFormatFlags.Default;
1350
1351                         switch (align) {
1352                                 case DataGridViewContentAlignment.BottomCenter:
1353                                         flags |= TextFormatFlags.Bottom;
1354                                         flags |= TextFormatFlags.HorizontalCenter;
1355                                         break;
1356                                 case DataGridViewContentAlignment.BottomLeft:
1357                                         flags |= TextFormatFlags.Bottom;
1358                                         break;
1359                                 case DataGridViewContentAlignment.BottomRight:
1360                                         flags |= TextFormatFlags.Bottom;
1361                                         flags |= TextFormatFlags.Right;
1362                                         break;
1363                                 case DataGridViewContentAlignment.MiddleCenter:
1364                                         flags |= TextFormatFlags.VerticalCenter;
1365                                         flags |= TextFormatFlags.HorizontalCenter;
1366                                         break;
1367                                 case DataGridViewContentAlignment.MiddleLeft:
1368                                         flags |= TextFormatFlags.VerticalCenter;
1369                                         break;
1370                                 case DataGridViewContentAlignment.MiddleRight:
1371                                         flags |= TextFormatFlags.VerticalCenter;
1372                                         flags |= TextFormatFlags.Right;
1373                                         break;
1374                                 case DataGridViewContentAlignment.TopLeft:
1375                                         flags |= TextFormatFlags.Top;
1376                                         break;
1377                                 case DataGridViewContentAlignment.TopCenter:
1378                                         flags |= TextFormatFlags.HorizontalCenter;
1379                                         flags |= TextFormatFlags.Top;
1380                                         break;
1381                                 case DataGridViewContentAlignment.TopRight:
1382                                         flags |= TextFormatFlags.Right;
1383                                         flags |= TextFormatFlags.Top;
1384                                         break;
1385                         }
1386
1387                         return flags;
1388                 }
1389
1390                 internal Rectangle AlignInRectangle (Rectangle outer, Size inner, DataGridViewContentAlignment align)
1391                 {
1392                         int x = 0;
1393                         int y = 0;
1394
1395                         if (align == DataGridViewContentAlignment.BottomLeft || align == DataGridViewContentAlignment.MiddleLeft || align == DataGridViewContentAlignment.TopLeft)
1396                                 x = outer.X;
1397                         else if (align == DataGridViewContentAlignment.BottomCenter || align == DataGridViewContentAlignment.MiddleCenter || align == DataGridViewContentAlignment.TopCenter)
1398                                 x = Math.Max (outer.X + ((outer.Width - inner.Width) / 2), outer.Left);
1399                         else if (align == DataGridViewContentAlignment.BottomRight || align == DataGridViewContentAlignment.MiddleRight || align == DataGridViewContentAlignment.TopRight)
1400                                 x = outer.Right - inner.Width;
1401                         if (align == DataGridViewContentAlignment.TopCenter || align == DataGridViewContentAlignment.TopLeft || align == DataGridViewContentAlignment.TopRight)
1402                                 y = outer.Y;
1403                         else if (align == DataGridViewContentAlignment.MiddleCenter || align == DataGridViewContentAlignment.MiddleLeft || align == DataGridViewContentAlignment.MiddleRight)
1404                                 y = outer.Y + (outer.Height - inner.Height) / 2;
1405                         else if (align == DataGridViewContentAlignment.BottomCenter || align == DataGridViewContentAlignment.BottomRight || align == DataGridViewContentAlignment.BottomLeft)
1406                                 y = outer.Bottom - inner.Height;
1407
1408                         return new Rectangle (x, y, Math.Min (inner.Width, outer.Width), Math.Min (inner.Height, outer.Height));
1409                 }
1410
1411                 [ComVisibleAttribute(true)]
1412                 protected class DataGridViewCellAccessibleObject : AccessibleObject {
1413
1414                         private DataGridViewCell dataGridViewCell;
1415
1416                         public DataGridViewCellAccessibleObject () {
1417                         }
1418
1419                         public DataGridViewCellAccessibleObject (DataGridViewCell owner) {
1420                                 this.dataGridViewCell = owner;
1421                         }
1422
1423                         public override Rectangle Bounds {
1424                                 get { throw new NotImplementedException(); }
1425                         }
1426
1427                         public override string DefaultAction {
1428                                 get { return "Edit"; }
1429                         }
1430
1431                         public override string Help {
1432                                 get { return base.Help; }
1433                         }
1434
1435                         public override string Name {
1436                                 get { return dataGridViewCell.OwningColumn.HeaderText + ": " + dataGridViewCell.RowIndex.ToString(); }
1437                         }
1438
1439                         public DataGridViewCell Owner {
1440                                 get { return dataGridViewCell; }
1441                                 set { dataGridViewCell = value; }
1442                         }
1443
1444                         public override AccessibleObject Parent {
1445                                 get { return dataGridViewCell.OwningRow.AccessibilityObject; }
1446                         }
1447
1448                         public override AccessibleRole Role {
1449                                 get { return AccessibleRole.Cell; }
1450                         }
1451
1452                         public override AccessibleStates State {
1453                                 get {
1454                                         if (dataGridViewCell.Selected) {
1455                                                 return AccessibleStates.Selected;
1456                                         }
1457                                         else {
1458                                                 return AccessibleStates.Focused;
1459                                         }
1460                                 }
1461                         }
1462
1463                         public override string Value {
1464                                 get {
1465                                         if (dataGridViewCell.FormattedValue == null) {
1466                                                 return "(null)";
1467                                         }
1468                                         return dataGridViewCell.FormattedValue.ToString();
1469                                 }
1470                                 set {
1471                                         if (owner == null)
1472                                                 throw new InvalidOperationException ("owner is null");
1473
1474                                         throw new NotImplementedException ();
1475                                 }
1476                         }
1477
1478                         public override void DoDefaultAction () {
1479                                 if (dataGridViewCell.DataGridView.EditMode != DataGridViewEditMode.EditProgrammatically) {
1480                                         if (dataGridViewCell.IsInEditMode) {
1481                                                 // commit edit
1482                                         }
1483                                         else {
1484                                                 // begin edit
1485                                         }
1486                                 }
1487                         }
1488
1489                         public override AccessibleObject GetChild (int index) {
1490                                 throw new NotImplementedException();
1491                         }
1492
1493                         public override int GetChildCount () {
1494                                 if (dataGridViewCell.IsInEditMode) {
1495                                         return 1;
1496                                 }
1497                                 return -1;
1498                         }
1499
1500                         public override AccessibleObject GetFocused () {
1501                                 return null;
1502                         }
1503
1504                         public override AccessibleObject GetSelected () {
1505                                 return null;
1506                         }
1507
1508                         public override AccessibleObject Navigate (AccessibleNavigation navigationDirection) {
1509                                 switch (navigationDirection) {
1510                                         case AccessibleNavigation.Right:
1511                                                 break;
1512                                         case AccessibleNavigation.Left:
1513                                                 break;
1514                                         case AccessibleNavigation.Next:
1515                                                 break;
1516                                         case AccessibleNavigation.Previous:
1517                                                 break;
1518                                         case AccessibleNavigation.Up:
1519                                                 break;
1520                                         case AccessibleNavigation.Down:
1521                                                 break;
1522                                         default:
1523                                                 return null;
1524                                 }
1525                                 return null;
1526                         }
1527
1528                         public override void Select (AccessibleSelection flags) {
1529                                 switch (flags) {
1530                                         case AccessibleSelection.TakeFocus:
1531                                                 dataGridViewCell.dataGridViewOwner.Focus();
1532                                                 break;
1533                                         case AccessibleSelection.TakeSelection:
1534                                                 //dataGridViewCell.Focus();
1535                                                 break;
1536                                         case AccessibleSelection.AddSelection:
1537                                                 dataGridViewCell.dataGridViewOwner.SelectedCells.InternalAdd(dataGridViewCell);
1538                                                 break;
1539                                         case AccessibleSelection.RemoveSelection:
1540                                                 dataGridViewCell.dataGridViewOwner.SelectedCells.InternalRemove(dataGridViewCell);
1541                                                 break;
1542                                 }
1543                         }
1544
1545                 }
1546         }
1547
1548         internal class DataGridViewCellConverter : TypeConverter
1549         {
1550         }
1551
1552 }
1553
1554 #endif