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

   1 //
   2 // TableLayoutPanel.cs
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23 // Copyright (c) 2006 Jonathan Pobst
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28
  29 using System;
  30 using System.Drawing;
  31 using System.ComponentModel;
  32 using System.Runtime.InteropServices;
  33 using System.Windows.Forms.Layout;
  34 using System.ComponentModel.Design.Serialization;
  35
  36 namespace System.Windows.Forms
  37 {
  38         [ComVisible (true)]
  39         [ClassInterface (ClassInterfaceType.AutoDispatch)]
  40         [ProvideProperty ("CellPosition", typeof (Control))]
  41         [ProvideProperty ("Column", typeof (Control))]
  42         [ProvideProperty ("ColumnSpan", typeof (Control))]
  43         [ProvideProperty ("Row", typeof (Control))]
  44         [ProvideProperty ("RowSpan", typeof (Control))]
  45         [DefaultProperty ("ColumnCount")]
  46         [Docking (DockingBehavior.Never)]
  47         [Designer ("System.Windows.Forms.Design.TableLayoutPanelDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
  48         [DesignerSerializer ("System.Windows.Forms.Design.TableLayoutPanelCodeDomSerializer, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.Serialization.CodeDomSerializer, " + Consts.AssemblySystem_Design)]
  49         public class TableLayoutPanel : Panel, IExtenderProvider
  50         {
  51                 private TableLayoutSettings settings;
  52                 private static TableLayout layout_engine = new TableLayout ();
  53                 private TableLayoutPanelCellBorderStyle cell_border_style;
  54
  55                 // This is the row/column the Control actually got placed
  56                 internal Control[,] actual_positions;
  57
  58                 // Widths and heights of each column/row
  59                 internal int[] column_widths;
  60                 internal int[] row_heights;
  61
  62                 #region Public Constructor
  63                 public TableLayoutPanel ()
  64                 {
  65                         settings = new TableLayoutSettings(this);
  66                         cell_border_style = TableLayoutPanelCellBorderStyle.None;
  67                         column_widths = new int[0];
  68                         row_heights = new int[0];
  69                         CreateDockPadding ();
  70                 }
  71                 #endregion
  72
  73                 #region Public Properties
  74                 [Localizable (true)]
  75                 [Browsable (false)]
  76                 [EditorBrowsable (EditorBrowsableState.Never)]
  77                 new public BorderStyle BorderStyle {
  78                         get { return base.BorderStyle; }
  79                         set { base.BorderStyle = value; }
  80                 }
  81
  82                 [Localizable (true)]
  83                 [DefaultValue (TableLayoutPanelCellBorderStyle.None)]
  84                 public TableLayoutPanelCellBorderStyle CellBorderStyle {
  85                         get { return this.cell_border_style; }
  86                         set {
  87                                 if (this.cell_border_style != value) {
  88                                         this.cell_border_style = value;
  89                                         this.PerformLayout (this, "CellBorderStyle");
  90                                         this.Invalidate ();
  91                                 }
  92                         }
  93                 }
  94
  95                 [Localizable (true)]
  96                 [DefaultValue (0)]
  97                 public int ColumnCount {
  98                         get { return settings.ColumnCount; }
  99                         set { settings.ColumnCount = value; }
 100                 }
 101
 102                 [Browsable (false)]
 103                 [DisplayName ("Columns")]
 104                 [MergableProperty (false)]
 105                 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
 106                 public TableLayoutColumnStyleCollection ColumnStyles {
 107                         get { return settings.ColumnStyles; }
 108                 }
 109
 110                 [Browsable (false)]
 111                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 112                 new public TableLayoutControlCollection Controls {
 113                         get { return (TableLayoutControlCollection) base.Controls; }
 114                 }
 115
 116                 [DefaultValue (TableLayoutPanelGrowStyle.AddRows)]
 117                 public TableLayoutPanelGrowStyle GrowStyle {
 118                         get { return settings.GrowStyle; }
 119                         set { settings.GrowStyle = value; }
 120                 }
 121
 122                 public override System.Windows.Forms.Layout.LayoutEngine LayoutEngine {
 123                         get { return TableLayoutPanel.layout_engine; }
 124                 }
 125
 126                 [Browsable (false)]
 127                 [EditorBrowsable (EditorBrowsableState.Never)]
 128                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 129                 public TableLayoutSettings LayoutSettings {
 130                         get { return this.settings; }
 131                         set {
 132                                 if (value.isSerialized) {
 133                                         // Serialized version doesn't calculate these.
 134                                         value.ColumnCount = value.ColumnStyles.Count;
 135                                         value.RowCount = value.RowStyles.Count;
 136                                         value.panel = this;
 137
 138                                         this.settings = value;
 139                                         value.isSerialized = false;
 140                                 } else
 141                                         throw new NotSupportedException ("LayoutSettings value cannot be set directly.");
 142                         }
 143                 }
 144
 145                 [Localizable (true)]
 146                 [DefaultValue (0)]
 147                 public int RowCount {
 148                         get { return settings.RowCount; }
 149                         set { settings.RowCount = value; }
 150                 }
 151
 152                 [Browsable (false)]
 153                 [DisplayName ("Rows")]
 154                 [MergableProperty (false)]
 155                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Content)]
 156                 public TableLayoutRowStyleCollection RowStyles {
 157                         get { return settings.RowStyles; }
 158                 }
 159                 #endregion
 160
 161                 #region Public Methods
 162                 [DefaultValue (-1)]
 163                 [DisplayName ("Cell")]
 164                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 165                 public TableLayoutPanelCellPosition GetCellPosition (Control control)
 166                 {
 167                         return settings.GetCellPosition (control);
 168                 }
 169
 170                 [DisplayName ("Column")]
 171                 [DefaultValue (-1)]
 172                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 173                 public int GetColumn (Control control)
 174                 {
 175                         return settings.GetColumn (control);
 176                 }
 177
 178                 [DisplayName ("ColumnSpan")]
 179                 [DefaultValue (1)]
 180                 public int GetColumnSpan (Control control)
 181                 {
 182                         return settings.GetColumnSpan (control);
 183                 }
 184
 185                 [Browsable (false)]
 186                 [EditorBrowsable (EditorBrowsableState.Never)]
 187                 public int[] GetColumnWidths ()
 188                 {
 189                         return this.column_widths;
 190                 }
 191
 192                 public Control GetControlFromPosition (int column, int row)
 193                 {
 194                         if (column < 0 || row < 0)
 195                                 throw new ArgumentException ();
 196
 197                         TableLayoutPanelCellPosition pos = new TableLayoutPanelCellPosition (column, row);
 198
 199                         foreach (Control c in this.Controls)
 200                                 if (settings.GetCellPosition (c) == pos)
 201                                         return c;
 202
 203                         return null;
 204                 }
 205
 206                 public TableLayoutPanelCellPosition GetPositionFromControl (Control control)
 207                 {
 208                         for (int x = 0; x < this.actual_positions.GetLength (0); x++)
 209                                 for (int y = 0; y < this.actual_positions.GetLength (1); y++)
 210                                         if (this.actual_positions[x, y] == control)
 211                                                 return new TableLayoutPanelCellPosition (x, y);
 212
 213                         return new TableLayoutPanelCellPosition (-1, -1);
 214                 }
 215
 216                 [DisplayName ("Row")]
 217                 [DefaultValue ("-1")]
 218                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
 219                 public int GetRow (Control control)
 220                 {
 221                         return settings.GetRow (control);
 222                 }
 223
 224                 [Browsable (false)]
 225                 [EditorBrowsable (EditorBrowsableState.Never)]
 226                 public int[] GetRowHeights ()
 227                 {
 228                         return this.row_heights;
 229                 }
 230
 231                 [DisplayName ("RowSpan")]
 232                 [DefaultValue (1)]
 233                 public int GetRowSpan (Control control)
 234                 {
 235                         return settings.GetRowSpan (control);
 236                 }
 237
 238                 public void SetCellPosition (Control control, TableLayoutPanelCellPosition position)
 239                 {
 240                         settings.SetCellPosition (control, position);
 241                 }
 242
 243                 public void SetColumn (Control control, int column)
 244                 {
 245                         settings.SetColumn (control, column);
 246                 }
 247
 248                 public void SetColumnSpan (Control control, int value)
 249                 {
 250                         settings.SetColumnSpan (control, value);
 251                 }
 252
 253                 public void SetRow (Control control, int row)
 254                 {
 255                         settings.SetRow (control, row);
 256                 }
 257
 258                 public void SetRowSpan (Control control, int value)
 259                 {
 260                         settings.SetRowSpan (control, value);
 261                 }
 262                 #endregion
 263
 264                 #region Protected Methods
 265                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 266                 protected override ControlCollection CreateControlsInstance ()
 267                 {
 268                         return new TableLayoutControlCollection (this);
 269                 }
 270
 271                 protected virtual void OnCellPaint (TableLayoutCellPaintEventArgs e)
 272                 {
 273                         TableLayoutCellPaintEventHandler eh = (TableLayoutCellPaintEventHandler)(Events [CellPaintEvent]);
 274                         if (eh != null)
 275                                 eh (this, e);
 276                 }
 277
 278                 [EditorBrowsable (EditorBrowsableState.Advanced)]
 279                 protected override void OnLayout (LayoutEventArgs levent)
 280                 {
 281                         base.OnLayout (levent);
 282                         Invalidate ();
 283                 }
 284
 285                 protected override void OnPaintBackground (PaintEventArgs e)
 286                 {
 287                         base.OnPaintBackground (e);
 288
 289                         DrawCellBorders (e);
 290
 291                         int border_width = GetCellBorderWidth (CellBorderStyle);
 292
 293                         int x = border_width;
 294                         int y = border_width;
 295
 296                         for (int i = 0; i < column_widths.Length; i++) {
 297                                 for (int j = 0; j < row_heights.Length; j++) {
 298                                         this.OnCellPaint (new TableLayoutCellPaintEventArgs (e.Graphics, e.ClipRectangle, new Rectangle (x, y, column_widths[i] + border_width, row_heights[j] + border_width), i, j));
 299                                         y += row_heights[j] + border_width;
 300                                 }
 301
 302                                 x += column_widths[i] + border_width;
 303                                 y = border_width;
 304                         }
 305                 }
 306
 307                 protected override void ScaleControl (SizeF factor, BoundsSpecified specified)
 308                 {
 309                         base.ScaleControl (factor, specified);
 310                 }
 311
 312                 [EditorBrowsable (EditorBrowsableState.Never)]
 313                 protected override void ScaleCore (float dx, float dy)
 314                 {
 315                         base.ScaleCore (dx, dy);
 316                 }
 317                 #endregion
 318
 319                 #region Internal Methods
 320                 internal static int GetCellBorderWidth (TableLayoutPanelCellBorderStyle style)
 321                 {
 322                         switch (style) {
 323                                 case TableLayoutPanelCellBorderStyle.Single:
 324                                         return 1;
 325                                 case TableLayoutPanelCellBorderStyle.Inset:
 326                                 case TableLayoutPanelCellBorderStyle.Outset:
 327                                         return 2;
 328                                 case TableLayoutPanelCellBorderStyle.InsetDouble:
 329                                 case TableLayoutPanelCellBorderStyle.OutsetPartial:
 330                                 case TableLayoutPanelCellBorderStyle.OutsetDouble:
 331                                         return 3;
 332                         }
 333
 334                         return 0;
 335                 }
 336
 337                 private void DrawCellBorders (PaintEventArgs e)
 338                 {
 339                         Rectangle paint_here = new Rectangle (Point.Empty, this.Size);
 340
 341                         switch (CellBorderStyle) {
 342                                 case TableLayoutPanelCellBorderStyle.Single:
 343                                         DrawSingleBorder (e.Graphics, paint_here);
 344                                         break;
 345                                 case TableLayoutPanelCellBorderStyle.Inset:
 346                                         DrawInsetBorder (e.Graphics, paint_here);
 347                                         break;
 348                                 case TableLayoutPanelCellBorderStyle.InsetDouble:
 349                                         DrawInsetDoubleBorder (e.Graphics, paint_here);
 350                                         break;
 351                                 case TableLayoutPanelCellBorderStyle.Outset:
 352                                         DrawOutsetBorder (e.Graphics, paint_here);
 353                                         break;
 354                                 case TableLayoutPanelCellBorderStyle.OutsetDouble:
 355                                 case TableLayoutPanelCellBorderStyle.OutsetPartial:
 356                                         DrawOutsetDoubleBorder (e.Graphics, paint_here);
 357                                         break;
 358                         }
 359                 }
 360
 361                 private void DrawSingleBorder (Graphics g, Rectangle rect)
 362                 {
 363                         ControlPaint.DrawBorder (g, rect, SystemColors.ControlDark, ButtonBorderStyle.Solid);
 364
 365                         int x = DisplayRectangle.X;
 366                         int y = DisplayRectangle.Y;
 367
 368                         for (int i = 0; i < column_widths.Length - 1; i++) {
 369                                 x += column_widths[i] + 1;
 370
 371                                 g.DrawLine (SystemPens.ControlDark, new Point (x, 1), new Point (x, Bottom - 2));
 372                         }
 373
 374                         for (int j = 0; j < row_heights.Length - 1; j++) {
 375                                 y += row_heights[j] + 1;
 376
 377                                 g.DrawLine (SystemPens.ControlDark, new Point (1, y), new Point (Right - 2, y));
 378                         }
 379                 }
 380
 381                 private void DrawInsetBorder (Graphics g, Rectangle rect)
 382                 {
 383                         ControlPaint.DrawBorder3D (g, rect, Border3DStyle.Etched);
 384
 385                         int x = DisplayRectangle.X;
 386                         int y = DisplayRectangle.Y;
 387
 388                         for (int i = 0; i < column_widths.Length - 1; i++) {
 389                                 x += column_widths[i] + 2;
 390
 391                                 g.DrawLine (SystemPens.ControlDark, new Point (x, 1), new Point (x, Bottom - 3));
 392                                 g.DrawLine (Pens.White, new Point (x + 1, 1), new Point (x + 1, Bottom - 3));
 393                         }
 394
 395                         for (int j = 0; j < row_heights.Length - 1; j++) {
 396                                 y += row_heights[j] + 2;
 397
 398                                 g.DrawLine (SystemPens.ControlDark, new Point (1, y), new Point (Right - 3, y));
 399                                 g.DrawLine (Pens.White, new Point (1, y + 1), new Point (Right - 3, y + 1));
 400                         }
 401                 }
 402
 403                 private void DrawOutsetBorder (Graphics g, Rectangle rect)
 404                 {
 405                         g.DrawRectangle (SystemPens.ControlDark, new Rectangle (rect.Left + 1, rect.Top + 1, rect.Width - 2, rect.Height - 2));
 406                         g.DrawRectangle (Pens.White, new Rectangle (rect.Left, rect.Top, rect.Width - 2, rect.Height - 2));
 407
 408                         int x = DisplayRectangle.X;
 409                         int y = DisplayRectangle.Y;
 410
 411                         for (int i = 0; i < column_widths.Length - 1; i++) {
 412                                 x += column_widths[i] + 2;
 413
 414                                 g.DrawLine (Pens.White, new Point (x, 1), new Point (x, Bottom - 3));
 415                                 g.DrawLine (SystemPens.ControlDark, new Point (x + 1, 1), new Point (x + 1, Bottom - 3));
 416                         }
 417
 418                         for (int j = 0; j < row_heights.Length - 1; j++) {
 419                                 y += row_heights[j] + 2;
 420
 421                                 g.DrawLine (Pens.White, new Point (1, y), new Point (Right - 3, y));
 422                                 g.DrawLine (SystemPens.ControlDark, new Point (1, y + 1), new Point (Right - 3, y + 1));
 423                         }
 424                 }
 425
 426                 private void DrawOutsetDoubleBorder (Graphics g, Rectangle rect)
 427                 {
 428                         rect.Width -= 1;
 429                         rect.Height -= 1;
 430
 431                         g.DrawRectangle (SystemPens.ControlDark, new Rectangle (rect.Left + 2, rect.Top + 2, rect.Width - 2, rect.Height - 2));
 432                         g.DrawRectangle (Pens.White, new Rectangle (rect.Left, rect.Top, rect.Width - 2, rect.Height - 2));
 433
 434                         int x = DisplayRectangle.X;
 435                         int y = DisplayRectangle.Y;
 436
 437                         for (int i = 0; i < column_widths.Length - 1; i++) {
 438                                 x += column_widths[i] + 3;
 439
 440                                 g.DrawLine (Pens.White, new Point (x, 3), new Point (x, Bottom - 5));
 441                                 g.DrawLine (SystemPens.ControlDark, new Point (x + 2, 3), new Point (x + 2, Bottom - 5));
 442                         }
 443
 444                         for (int j = 0; j < row_heights.Length - 1; j++) {
 445                                 y += row_heights[j] + 3;
 446
 447                                 g.DrawLine (Pens.White, new Point (3, y), new Point (Right - 4, y));
 448                                 g.DrawLine (SystemPens.ControlDark, new Point (3, y + 2), new Point (Right - 4, y + 2));
 449                         }
 450
 451                         x = DisplayRectangle.X;
 452                         y = DisplayRectangle.Y;
 453
 454                         for (int i = 0; i < column_widths.Length - 1; i++) {
 455                                 x += column_widths[i] + 3;
 456
 457                                 g.DrawLine (ThemeEngine.Current.ResPool.GetPen (BackColor), new Point (x + 1, 3), new Point (x + 1, Bottom - 5));
 458                         }
 459
 460                         for (int j = 0; j < row_heights.Length - 1; j++) {
 461                                 y += row_heights[j] + 3;
 462
 463                                 g.DrawLine (ThemeEngine.Current.ResPool.GetPen (BackColor), new Point (3, y + 1), new Point (Right - 4, y + 1));
 464                         }
 465                 }
 466
 467                 private void DrawInsetDoubleBorder (Graphics g, Rectangle rect)
 468                 {
 469                         rect.Width -= 1;
 470                         rect.Height -= 1;
 471
 472                         g.DrawRectangle (Pens.White, new Rectangle (rect.Left + 2, rect.Top + 2, rect.Width - 2, rect.Height - 2));
 473                         g.DrawRectangle (SystemPens.ControlDark, new Rectangle (rect.Left, rect.Top, rect.Width - 2, rect.Height - 2));
 474
 475                         int x = DisplayRectangle.X;
 476                         int y = DisplayRectangle.Y;
 477
 478                         for (int i = 0; i < column_widths.Length - 1; i++) {
 479                                 x += column_widths[i] + 3;
 480
 481                                 g.DrawLine (SystemPens.ControlDark, new Point (x, 3), new Point (x, Bottom - 5));
 482                                 g.DrawLine (Pens.White, new Point (x + 2, 3), new Point (x + 2, Bottom - 5));
 483                         }
 484
 485                         for (int j = 0; j < row_heights.Length - 1; j++) {
 486                                 y += row_heights[j] + 3;
 487
 488                                 g.DrawLine (SystemPens.ControlDark, new Point (3, y), new Point (Right - 4, y));
 489                                 g.DrawLine (Pens.White, new Point (3, y + 2), new Point (Right - 4, y + 2));
 490                         }
 491
 492                         x = DisplayRectangle.X;
 493                         y = DisplayRectangle.Y;
 494
 495                         for (int i = 0; i < column_widths.Length - 1; i++) {
 496                                 x += column_widths[i] + 3;
 497
 498                                 g.DrawLine (ThemeEngine.Current.ResPool.GetPen (BackColor), new Point (x + 1, 3), new Point (x + 1, Bottom - 5));
 499                         }
 500
 501                         for (int j = 0; j < row_heights.Length - 1; j++) {
 502                                 y += row_heights[j] + 3;
 503
 504                                 g.DrawLine (ThemeEngine.Current.ResPool.GetPen (BackColor), new Point (3, y + 1), new Point (Right - 4, y + 1));
 505                         }
 506                 }
 507
 508                 internal override Size GetPreferredSizeCore (Size proposedSize)
 509                 {
 510                         // If the tablelayoutowner is autosize, we have to make sure it is big enough
 511                         // to hold every non-autosize control
 512                         actual_positions = (LayoutEngine as TableLayout).CalculateControlPositions (this, Math.Max (ColumnCount, 1), Math.Max (RowCount, 1));
 513
 514                         // Use actual row/column counts, not user set ones
 515                         int actual_cols = actual_positions.GetLength (0);
 516                         int actual_rows = actual_positions.GetLength (1);
 517
 518                         // Figure out how wide the owner needs to be
 519                         int[] column_widths = new int[actual_cols];
 520                         float total_column_percentage = 0f;
 521
 522                         // Figure out how tall each column wants to be
 523                         for (int i = 0; i < actual_cols; i++) {
 524                                 if (i < ColumnStyles.Count && ColumnStyles[i].SizeType == SizeType.Percent)
 525                                         total_column_percentage += ColumnStyles[i].Width;
 526
 527                                 int biggest = 0;
 528
 529                                 for (int j = 0; j < actual_rows; j++) {
 530                                         Control c = actual_positions[i, j];
 531
 532                                         if (c != null) {
 533                                                 if (!c.AutoSize)
 534                                                         biggest = Math.Max (biggest, c.ExplicitBounds.Width + c.Margin.Horizontal + Padding.Horizontal);
 535                                                 else
 536                                                         biggest = Math.Max (biggest, c.PreferredSize.Width + c.Margin.Horizontal + Padding.Horizontal);
 537                                         }
 538                                 }
 539
 540                                 column_widths[i] = biggest;
 541                         }
 542
 543                         // Because percentage based rows divy up the remaining space,
 544                         // we have to make the owner big enough so that all the rows
 545                         // get bigger, even if we only need one to be bigger.
 546                         int non_percent_total_width = 0;
 547                         int percent_total_width = 0;
 548
 549                         for (int i = 0; i < actual_cols; i++) {
 550                                 if (i < ColumnStyles.Count && ColumnStyles[i].SizeType == SizeType.Percent)
 551                                         percent_total_width = Math.Max (percent_total_width, (int)(column_widths[i] / ((ColumnStyles[i].Width) / total_column_percentage)));
 552                                 else
 553                                         non_percent_total_width += column_widths[i];
 554                         }
 555
 556
 557                         // Figure out how tall the owner needs to be
 558                         int[] row_heights = new int[actual_rows];
 559                         float total_row_percentage = 0f;
 560
 561                         // Figure out how tall each row wants to be
 562                         for (int j = 0; j < actual_rows; j++) {
 563                                 if (j < RowStyles.Count && RowStyles[j].SizeType == SizeType.Percent)
 564                                         total_row_percentage += RowStyles[j].Height;
 565
 566                                 int biggest = 0;
 567
 568                                 for (int i = 0; i < actual_cols; i++) {
 569                                         Control c = actual_positions[i, j];
 570
 571                                         if (c != null) {
 572                                                 if (!c.AutoSize)
 573                                                         biggest = Math.Max (biggest, c.ExplicitBounds.Height + c.Margin.Vertical + Padding.Vertical);
 574                                                 else
 575                                                         biggest = Math.Max (biggest, c.PreferredSize.Height + c.Margin.Vertical + Padding.Vertical);
 576                                         }
 577                                 }
 578
 579                                 row_heights[j] = biggest;
 580                         }
 581
 582                         // Because percentage based rows divy up the remaining space,
 583                         // we have to make the owner big enough so that all the rows
 584                         // get bigger, even if we only need one to be bigger.
 585                         int non_percent_total_height = 0;
 586                         int percent_total_height = 0;
 587
 588                         for (int j = 0; j < actual_rows; j++) {
 589                                 if (j < RowStyles.Count && RowStyles[j].SizeType == SizeType.Percent)
 590                                         percent_total_height = Math.Max (percent_total_height, (int)(row_heights[j] / ((RowStyles[j].Height) / total_row_percentage)));
 591                                 else
 592                                         non_percent_total_height += row_heights[j];
 593                         }
 594
 595                         int border_width = GetCellBorderWidth (CellBorderStyle);
 596                         return new Size (non_percent_total_width + percent_total_width + (border_width * (actual_cols + 1)), non_percent_total_height + percent_total_height + (border_width * (actual_rows + 1)));
 597                 }
 598                 #endregion
 599
 600                 #region Public Events
 601                 static object CellPaintEvent = new object ();
 602
 603                 public event TableLayoutCellPaintEventHandler CellPaint {
 604                         add { Events.AddHandler (CellPaintEvent, value); }
 605                         remove { Events.RemoveHandler (CellPaintEvent, value); }
 606                 }
 607                 #endregion
 608
 609                 #region IExtenderProvider
 610                 bool IExtenderProvider.CanExtend (object obj)
 611                 {
 612                         if (obj is Control)
 613                                 if ((obj as Control).Parent == this)
 614                                         return true;
 615
 616                         return false;
 617                 }
 618                 #endregion
 619
 620         }
 621 }