mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGridViewColumnHeaderCell.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 //
  25
  26
  27 using System;
  28 using System.Drawing;
  29 using System.ComponentModel;
  30
  31 namespace System.Windows.Forms {
  32
  33         public class DataGridViewColumnHeaderCell : DataGridViewHeaderCell {
  34
  35                 private SortOrder sortGlyphDirection = SortOrder.None;
  36                 private object header_text;
  37
  38                 public DataGridViewColumnHeaderCell () {
  39                 }
  40
  41                 [DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
  42                 public SortOrder SortGlyphDirection {
  43                         get { return sortGlyphDirection; }
  44                         set { sortGlyphDirection = value; }
  45                 }
  46
  47                 public override object Clone () {
  48                         return MemberwiseClone();
  49                 }
  50
  51                 public override ContextMenuStrip GetInheritedContextMenuStrip (int rowIndex) {
  52                         if (rowIndex != -1) {
  53                                 throw new ArgumentOutOfRangeException("RowIndex is not -1");
  54                         }
  55                         if (base.ContextMenuStrip != null) {
  56                                 return base.ContextMenuStrip;
  57                         }
  58                         return base.GetInheritedContextMenuStrip(rowIndex); //////////////////////////////
  59                 }
  60
  61                 public override DataGridViewCellStyle GetInheritedStyle (DataGridViewCellStyle inheritedCellStyle, int rowIndex, bool includeColors)
  62                 {
  63                         DataGridViewCellStyle result = new DataGridViewCellStyle (DataGridView.DefaultCellStyle);
  64
  65                         result.ApplyStyle (DataGridView.ColumnHeadersDefaultCellStyle);
  66
  67                         if (HasStyle)
  68                                 result.ApplyStyle (Style);
  69
  70                         return result;
  71                 }
  72
  73                 public override string ToString () {
  74                         return GetType().Name;
  75                 }
  76
  77                 protected override AccessibleObject CreateAccessibilityInstance () {
  78                         return new DataGridViewColumnHeaderCellAccessibleObject(this);
  79                 }
  80
  81                 protected override object GetClipboardContent (int rowIndex, bool firstCell, bool lastCell, bool inFirstRow, bool inLastRow, string format) {
  82
  83                         string value;
  84
  85                         if (rowIndex != -1)
  86                                 throw new ArgumentOutOfRangeException ("rowIndex");
  87
  88                         value = GetValue (rowIndex) as string;
  89
  90                         string table_prefix = string.Empty, cell_prefix = string.Empty, row_prefix = string.Empty;
  91                         string table_suffix = string.Empty, cell_suffix = string.Empty, row_suffix = string.Empty;
  92
  93                         if (format == DataFormats.UnicodeText || format == DataFormats.Text) {
  94                                 if (lastCell && !inLastRow)
  95                                         cell_suffix = Environment.NewLine;
  96                                 else if (!lastCell)
  97                                         cell_suffix = "\t";
  98                         } else if (format == DataFormats.CommaSeparatedValue) {
  99                                 if (lastCell && !inLastRow)
 100                                         cell_suffix = Environment.NewLine;
 101                                 else if (!lastCell)
 102                                         cell_suffix = ",";
 103                         } else if (format == DataFormats.Html) {
 104                                 if (firstCell) {
 105                                         table_prefix = "<TABLE>";
 106                                         row_prefix = "<THEAD>";
 107                                 }
 108
 109                                 cell_prefix = "<TH>";
 110                                 cell_suffix = "</TH>";
 111
 112                                 if (lastCell) {
 113                                         row_suffix = "</THEAD>";
 114                                         if (inLastRow) {
 115                                                 table_suffix = "</TABLE>";
 116                                         }
 117                                 }
 118
 119                                 if (value == null) {
 120                                         value = "&nbsp;";
 121                                 }
 122                         } else {
 123                                 return value;
 124                         }
 125
 126                         if (value == null)
 127                                 value = string.Empty;
 128
 129                         value = table_prefix + row_prefix + cell_prefix + value + cell_suffix + row_suffix + table_suffix;
 130
 131                         return value;
 132
 133                 }
 134
 135                 protected override Rectangle GetContentBounds (Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex)
 136                 {
 137                         if (DataGridView == null)
 138                                 return Rectangle.Empty;
 139
 140                         object o = GetValue (-1);
 141
 142                         if (o == null || o.ToString () == string.Empty)
 143                                 return Rectangle.Empty;
 144
 145                         Size s = Size.Empty;
 146
 147                         if (o != null)
 148                                 s = DataGridViewCell.MeasureTextSize (graphics, o.ToString (), cellStyle.Font, TextFormatFlags.Default);
 149
 150                         return new Rectangle (3, (DataGridView.ColumnHeadersHeight - s.Height) / 2, s.Width, s.Height);
 151                 }
 152
 153                 protected override Size GetPreferredSize (Graphics graphics, DataGridViewCellStyle cellStyle, int rowIndex, Size constraintSize)
 154                 {
 155                         object o = header_text;
 156
 157                         if (o != null) {
 158                                 Size s = DataGridViewCell.MeasureTextSize (graphics, o.ToString (), cellStyle.Font, TextFormatFlags.Default);
 159                                 s.Height = Math.Max (s.Height, 18);
 160                                 s.Width += 25;
 161                                 return s;
 162                         } else
 163                                 return new Size (19, 12);
 164                 }
 165
 166                 protected override object GetValue (int rowIndex) {
 167                         if (header_text != null)
 168                                 return header_text;
 169
 170                         if (OwningColumn != null && !OwningColumn.HeaderTextSet)
 171                                 return OwningColumn.Name;
 172
 173                         return null;
 174                 }
 175
 176                 protected override void Paint (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates dataGridViewElementState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts) {
 177                         // Prepaint
 178                         DataGridViewPaintParts pre = DataGridViewPaintParts.Background | DataGridViewPaintParts.SelectionBackground;
 179                         pre = pre & paintParts;
 180
 181                         base.Paint (graphics, clipBounds, cellBounds, rowIndex, dataGridViewElementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, pre);
 182
 183                         // Paint content
 184                         if ((paintParts & DataGridViewPaintParts.ContentForeground) == DataGridViewPaintParts.ContentForeground) {
 185                                 Color color = Selected ? cellStyle.SelectionForeColor : cellStyle.ForeColor;
 186
 187                                 TextFormatFlags flags = TextFormatFlags.EndEllipsis | TextFormatFlags.VerticalCenter | TextFormatFlags.TextBoxControl;
 188
 189                                 Rectangle contentbounds = cellBounds;
 190                                 contentbounds.Height -= 2;
 191                                 contentbounds.Width -= 2;
 192
 193                                 if (formattedValue != null)
 194                                         TextRenderer.DrawText (graphics, formattedValue.ToString (), cellStyle.Font, contentbounds, color, flags);
 195
 196                                 Point loc = new Point (cellBounds.Right - 14, cellBounds.Y + ((cellBounds.Height - 4) / 2));
 197
 198                                 if (sortGlyphDirection == SortOrder.Ascending) {
 199                                         using (Pen p = new Pen (color)) {
 200                                                 graphics.DrawLine (p, loc.X + 4, loc.Y + 1, loc.X + 4, loc.Y + 2);
 201                                                 graphics.DrawLine (p, loc.X + 3, loc.Y + 2, loc.X + 5, loc.Y + 2);
 202                                                 graphics.DrawLine (p, loc.X + 2, loc.Y + 3, loc.X + 6, loc.Y + 3);
 203                                                 graphics.DrawLine (p, loc.X + 1, loc.Y + 4, loc.X + 7, loc.Y + 4);
 204                                                 graphics.DrawLine (p, loc.X + 0, loc.Y + 5, loc.X + 8, loc.Y + 5);
 205                                         }
 206                                 } else if (sortGlyphDirection == SortOrder.Descending) {
 207                                         using (Pen p = new Pen (color)) {
 208                                                 graphics.DrawLine (p, loc.X + 4, loc.Y + 5, loc.X + 4, loc.Y + 4);
 209                                                 graphics.DrawLine (p, loc.X + 3, loc.Y + 4, loc.X + 5, loc.Y + 4);
 210                                                 graphics.DrawLine (p, loc.X + 2, loc.Y + 3, loc.X + 6, loc.Y + 3);
 211                                                 graphics.DrawLine (p, loc.X + 1, loc.Y + 2, loc.X + 7, loc.Y + 2);
 212                                                 graphics.DrawLine (p, loc.X + 0, loc.Y + 1, loc.X + 8, loc.Y + 1);
 213                                         }
 214                                 }
 215                         }
 216
 217                         // Postpaint
 218                         DataGridViewPaintParts post = DataGridViewPaintParts.Border;
 219
 220                         if (this is DataGridViewTopLeftHeaderCell)
 221                                 post |= DataGridViewPaintParts.ErrorIcon;
 222
 223                         post = post & paintParts;
 224
 225                         base.Paint (graphics, clipBounds, cellBounds, rowIndex, dataGridViewElementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, post);
 226                 }
 227
 228                 protected override void PaintBorder (Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle)
 229                 {
 230                         if (ThemeEngine.Current.DataGridViewColumnHeaderCellDrawBorder (this, graphics, cellBounds))
 231                                 return;
 232
 233                         Pen p = GetBorderPen ();
 234
 235                         if (ColumnIndex == -1) {
 236                                 graphics.DrawLine (p, cellBounds.Left, cellBounds.Top, cellBounds.Left, cellBounds.Bottom - 1);
 237                                 graphics.DrawLine (p, cellBounds.Right - 1, cellBounds.Top, cellBounds.Right - 1, cellBounds.Bottom - 1);
 238
 239                                 graphics.DrawLine (p, cellBounds.Left, cellBounds.Bottom - 1, cellBounds.Right - 1, cellBounds.Bottom - 1);
 240                                 graphics.DrawLine (p, cellBounds.Left, cellBounds.Top, cellBounds.Right - 1, cellBounds.Top);
 241                         } else {
 242                                 graphics.DrawLine (p, cellBounds.Left, cellBounds.Bottom - 1, cellBounds.Right - 1, cellBounds.Bottom - 1);
 243                                 graphics.DrawLine (p, cellBounds.Left, cellBounds.Top, cellBounds.Right - 1, cellBounds.Top);
 244
 245                                 if (ColumnIndex == DataGridView.Columns.Count - 1 || ColumnIndex == -1)
 246                                         graphics.DrawLine (p, cellBounds.Right - 1, cellBounds.Top, cellBounds.Right - 1, cellBounds.Bottom - 1);
 247                                 else
 248                                         graphics.DrawLine (p, cellBounds.Right - 1, cellBounds.Top + 3, cellBounds.Right - 1, cellBounds.Bottom - 3);
 249                         }
 250                 }
 251
 252                 internal override void PaintPartBackground (Graphics graphics, Rectangle cellBounds, DataGridViewCellStyle style)
 253                 {
 254                         if (ThemeEngine.Current.DataGridViewColumnHeaderCellDrawBackground (this, graphics, cellBounds))
 255                                 return;
 256                         base.PaintPartBackground (graphics, cellBounds, style);
 257                 }
 258
 259                 protected override bool SetValue (int rowIndex, object value) {
 260                         header_text = value;
 261                         return true;
 262                 }
 263
 264                 protected class DataGridViewColumnHeaderCellAccessibleObject : DataGridViewCellAccessibleObject {
 265
 266                         public DataGridViewColumnHeaderCellAccessibleObject (DataGridViewColumnHeaderCell owner) : base (owner) {
 267                         }
 268
 269                         public override Rectangle Bounds {
 270                                 get { return base.Bounds; }
 271                         }
 272
 273                         public override string DefaultAction {
 274                                 get { return base.DefaultAction; }
 275                         }
 276
 277                         public override string Name {
 278                                 get { return base.Name; }
 279                         }
 280
 281                         public override AccessibleObject Parent {
 282                                 get { return base.Parent; }
 283                         }
 284
 285                         public override AccessibleRole Role {
 286                                 get { return base.Role; }
 287                         }
 288
 289                         public override AccessibleStates State {
 290                                 get { return base.State; }
 291                         }
 292
 293                         public override string Value {
 294                                 get { return base.Value; }
 295                         }
 296
 297                         public override void DoDefaultAction () {
 298                                 base.DoDefaultAction();
 299                         }
 300
 301                         public override AccessibleObject Navigate (AccessibleNavigation navigationDirection) {
 302                                 return base.Navigate(navigationDirection);
 303                         }
 304
 305                         public override void Select (AccessibleSelection flags)
 306                         {
 307                                 base.Select (flags);
 308                         }
 309                 }
 310
 311         }
 312
 313 }
 314