mcs/class/Managed.Windows.Forms/System.Windows.Forms.Theming/Default/TabControlPainter.cs

   1 // Permission is hereby granted, free of charge, to any person obtaining\r
   2 // a copy of this software and associated documentation files (the\r
   3 // "Software"), to deal in the Software without restriction, including\r
   4 // without limitation the rights to use, copy, modify, merge, publish,\r
   5 // distribute, sublicense, and/or sell copies of the Software, and to\r
   6 // permit persons to whom the Software is furnished to do so, subject to\r
   7 // the following conditions:\r
   8 //\r
   9 // The above copyright notice and this permission notice shall be\r
  10 // included in all copies or substantial portions of the Software.\r
  11 //\r
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND\r
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE\r
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION\r
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
  19 //\r
  20 // Copyright (c) 2007 Novell, Inc.\r
  21 //\r
  22 // Authors:\r
  23 //      Andreia Gaita (avidigal@novell.com)\r
  24 \r
  25 using System;\r
  26 using System.Drawing;\r
  27 using System.Drawing.Text;\r
  28 using System.Windows.Forms;\r
  29 using System.Windows.Forms.VisualStyles;\r
  30 \r
  31 namespace System.Windows.Forms.Theming.Default\r
  32 {\r
  33         /// <summary>\r
  34         /// Summary description for TabControl.\r
  35         /// </summary>\r
  36         internal class TabControlPainter {\r
  37                 protected SystemResPool ResPool { get { return ThemeEngine.Current.ResPool; } }\r
  38 \r
  39                 #region private\r
  40 \r
  41                 private Size    defaultItemSize;\r
  42                 private Point   defaultPadding;\r
  43                 private int             minimumTabWidth;\r
  44                 private Rectangle selectedTabDelta;\r
  45 \r
  46                 private Point   tabPanelOffset;\r
  47                 \r
  48                 private int             selectedSpacing;\r
  49 \r
  50                 private Size    rowSpacingNormal;\r
  51                 private Size    rowSpacingButtons;\r
  52                 private Size    rowSpacingFlatButtons;\r
  53                 private int             scrollerWidth;\r
  54                 private Point   focusRectSpacing;\r
  55                 private Rectangle tabPageSpacing;\r
  56                 private int             colSpacing;\r
  57                 private int             flatButtonSpacing;\r
  58 \r
  59                 private Point   imagePadding;\r
  60 \r
  61                 private StringFormat defaultFormatting;\r
  62 \r
  63                 private Rectangle borderThickness;\r
  64 \r
  65                 #endregion\r
  66 \r
  67                 #region Properties\r
  68 \r
  69                 public virtual Size DefaultItemSize {\r
  70                         get { return defaultItemSize; }\r
  71                         set { defaultItemSize = value; }\r
  72                 }\r
  73 \r
  74                 public virtual Point DefaultPadding {\r
  75                         get { return defaultPadding; }\r
  76                         set { defaultPadding = value; }\r
  77                 }\r
  78 \r
  79                 public virtual int MinimumTabWidth {\r
  80                         get { return minimumTabWidth; }\r
  81                         set { minimumTabWidth = value; }\r
  82                 }\r
  83 \r
  84                 public virtual Rectangle SelectedTabDelta {\r
  85                         get { return selectedTabDelta; }\r
  86                         set { selectedTabDelta = value; }\r
  87                 }\r
  88 \r
  89                 public virtual Point TabPanelOffset {\r
  90                         get { return tabPanelOffset; }\r
  91                         set { tabPanelOffset = value; }\r
  92                 }\r
  93 \r
  94                 public virtual int SelectedSpacing {\r
  95                         get { return selectedSpacing; }\r
  96                         set { selectedSpacing = value; }\r
  97                 }\r
  98 \r
  99                 public virtual Size RowSpacingNormal { \r
 100                         get { return rowSpacingNormal; }\r
 101                         set { rowSpacingNormal = value; }\r
 102                 }\r
 103 \r
 104                 public virtual Size RowSpacingButtons { \r
 105                         get { return rowSpacingButtons; }\r
 106                         set { rowSpacingButtons = value; }\r
 107                 }\r
 108 \r
 109                 public virtual Size RowSpacingFlatButtons { \r
 110                         get { return rowSpacingFlatButtons; }\r
 111                         set { rowSpacingFlatButtons = value; }\r
 112                 }\r
 113 \r
 114                 public virtual Point FocusRectSpacing {\r
 115                         get { return focusRectSpacing; }\r
 116                         set { focusRectSpacing = value; }\r
 117                 }\r
 118 \r
 119                 public virtual int ColSpacing { \r
 120                         get { return colSpacing; }\r
 121                         set { colSpacing = value; }\r
 122                 }\r
 123 \r
 124                 public virtual int FlatButtonSpacing { \r
 125                         get { return flatButtonSpacing; }\r
 126                         set { flatButtonSpacing = value; }\r
 127                 }\r
 128 \r
 129                 public virtual Rectangle TabPageSpacing {\r
 130                         get { return tabPageSpacing; }\r
 131                         set { tabPageSpacing = value; }\r
 132                 }\r
 133 \r
 134                 public virtual Point ImagePadding {\r
 135                         get { return imagePadding; }\r
 136                         set { imagePadding = value; }\r
 137                 }\r
 138 \r
 139                 public virtual StringFormat DefaultFormatting {\r
 140                         get { return defaultFormatting; }\r
 141                         set { defaultFormatting = value; }\r
 142                 }\r
 143 \r
 144                 public virtual Rectangle BorderThickness {\r
 145                         get { return borderThickness; }\r
 146                         set { borderThickness = value; }\r
 147                 }\r
 148 \r
 149                 public virtual int ScrollerWidth {\r
 150                         get { return scrollerWidth; }\r
 151                         set { scrollerWidth = value; }\r
 152                 }\r
 153 \r
 154                 public virtual Size RowSpacing (System.Windows.Forms.TabControl tab) {\r
 155                         switch (tab.Appearance) {\r
 156                                 case TabAppearance.Normal:\r
 157                                         return rowSpacingNormal;\r
 158                                 case TabAppearance.Buttons:\r
 159                                         return rowSpacingButtons;\r
 160                                 case TabAppearance.FlatButtons:\r
 161                                         return rowSpacingFlatButtons;\r
 162                                 default:\r
 163                                         throw new Exception ("Invalid Appearance value: " + tab.Appearance);\r
 164                         }\r
 165                 }\r
 166                 #endregion\r
 167 \r
 168                 public TabControlPainter ()\r
 169                 {\r
 170                         defaultItemSize = new Size (42, 21);\r
 171                         defaultPadding = new Point (6, 3);\r
 172                         selectedTabDelta = new Rectangle (2, 2, 4, 3);\r
 173                         selectedSpacing = 0;\r
 174 \r
 175                         rowSpacingNormal = new Size (0, 0);\r
 176                         rowSpacingButtons = new Size (3, 3);\r
 177                         rowSpacingFlatButtons = new Size (9, 3);\r
 178                         \r
 179                         colSpacing = 0;\r
 180 \r
 181                         minimumTabWidth = 42;\r
 182                         scrollerWidth = 17;\r
 183                         focusRectSpacing = new Point (2, 2);\r
 184                         tabPanelOffset = new Point (4, 0);\r
 185                         flatButtonSpacing = 8;\r
 186                         tabPageSpacing = new Rectangle (4, 2, 3, 4);\r
 187 \r
 188                         imagePadding = new Point (2, 3);\r
 189 \r
 190                         defaultFormatting = new StringFormat();\r
 191                         defaultFormatting.Alignment = StringAlignment.Near;\r
 192                         defaultFormatting.LineAlignment = StringAlignment.Near;\r
 193                         defaultFormatting.FormatFlags = StringFormatFlags.NoWrap | StringFormatFlags.NoClip;\r
 194                         defaultFormatting.HotkeyPrefix = HotkeyPrefix.Show;\r
 195 \r
 196                         borderThickness = new Rectangle (1, 1, 2, 2);\r
 197                 }\r
 198 \r
 199                 public virtual Rectangle GetLeftScrollRect (System.Windows.Forms.TabControl tab)\r
 200                 {\r
 201                         switch (tab.Alignment) {\r
 202                                 case TabAlignment.Top:\r
 203                                         return new Rectangle (tab.ClientRectangle.Right - (scrollerWidth * 2), tab.ClientRectangle.Top + 1, scrollerWidth, scrollerWidth);\r
 204                                 default:\r
 205                                         Rectangle panel_rect = GetTabPanelRect (tab);\r
 206                                         return new Rectangle (tab.ClientRectangle.Right - (scrollerWidth * 2), panel_rect.Bottom + 2, scrollerWidth, scrollerWidth);\r
 207                         }\r
 208                 }\r
 209 \r
 210                 public virtual Rectangle GetRightScrollRect (System.Windows.Forms.TabControl tab)\r
 211                 {\r
 212                         switch (tab.Alignment) {\r
 213                                 case TabAlignment.Top:\r
 214                                         return new Rectangle (tab.ClientRectangle.Right - (scrollerWidth), tab.ClientRectangle.Top + 1, scrollerWidth, scrollerWidth);\r
 215                                 default:\r
 216                                         Rectangle panel_rect = GetTabPanelRect (tab);\r
 217                                         return new Rectangle (tab.ClientRectangle.Right - (scrollerWidth), panel_rect.Bottom + 2, scrollerWidth, scrollerWidth);\r
 218                         }\r
 219                 }\r
 220 \r
 221                 public Rectangle GetDisplayRectangle (System.Windows.Forms.TabControl tab)\r
 222                 {\r
 223                         Rectangle ext = GetTabPanelRect (tab);\r
 224                         // Account for border size\r
 225                         return new Rectangle (ext.Left + tabPageSpacing.X, ext.Top + tabPageSpacing.Y, \r
 226                                 ext.Width - tabPageSpacing.X - tabPageSpacing.Width, ext.Height - tabPageSpacing.Y - tabPageSpacing.Height);\r
 227                 }\r
 228                 \r
 229                 public Rectangle GetTabPanelRect (System.Windows.Forms.TabControl tab)\r
 230                 {       \r
 231                         // Offset the tab page (panel) from the top corner\r
 232                         Rectangle res = new Rectangle (tab.ClientRectangle.X,\r
 233                                 tab.ClientRectangle.Y,\r
 234                                 tab.ClientRectangle.Width,\r
 235                                 tab.ClientRectangle.Height);\r
 236 \r
 237                         if (tab.TabCount == 0)\r
 238                                 return res;\r
 239 \r
 240                         int spacing = RowSpacing (tab).Height;\r
 241                         int tabOffset = (tab.ItemSize.Height + spacing - selectedTabDelta.Height) * tab.RowCount + selectedTabDelta.Y;\r
 242                         switch (tab.Alignment) {\r
 243                                 case TabAlignment.Top:\r
 244                                         res.Y += tabOffset;\r
 245                                         res.Height -= tabOffset;\r
 246                                         break;\r
 247                                 case TabAlignment.Bottom:\r
 248                                         res.Height -= tabOffset;\r
 249                                         break;\r
 250                                 case TabAlignment.Left:\r
 251                                         res.X += tabOffset;\r
 252                                         res.Width -= tabOffset;\r
 253                                         break;\r
 254                                 case TabAlignment.Right:\r
 255                                         res.Width -= tabOffset;\r
 256                                         break;\r
 257                         }\r
 258 \r
 259                         return res;\r
 260                 }\r
 261 \r
 262                 public virtual void Draw (Graphics dc, Rectangle area, TabControl tab)\r
 263                 {\r
 264                         DrawBackground (dc, area, tab);\r
 265 \r
 266                         int start = 0;\r
 267                         int end = tab.TabPages.Count;\r
 268                         int delta = 1;\r
 269 \r
 270                         if (tab.Alignment == TabAlignment.Top) {\r
 271                                 start = end;\r
 272                                 end = 0;\r
 273                                 delta = -1;\r
 274                         }\r
 275                         int counter = start;\r
 276                         for (; counter != end; counter += delta) {\r
 277                                 for (int i = tab.SliderPos; i < tab.TabPages.Count; i++) {\r
 278                                         if (i == tab.SelectedIndex)\r
 279                                                 continue;\r
 280                                         if (counter != tab.TabPages[i].Row)\r
 281                                                 continue;\r
 282                                         Rectangle rect = tab.GetTabRect (i);\r
 283                                         if (!rect.IntersectsWith (area))\r
 284                                                 continue;\r
 285                                         DrawTab (dc, tab.TabPages[i], tab, rect, false);\r
 286                                 }\r
 287                         }\r
 288 \r
 289                         if (tab.SelectedIndex != -1 && tab.SelectedIndex >= tab.SliderPos) {\r
 290                                 Rectangle rect = tab.GetTabRect (tab.SelectedIndex);\r
 291                                 if (rect.IntersectsWith (area))\r
 292                                         DrawTab (dc, tab.TabPages[tab.SelectedIndex], tab, rect, true);\r
 293                         }\r
 294 \r
 295                         if (tab.ShowSlider) {\r
 296                                 Rectangle right = GetRightScrollRect (tab);\r
 297                                 Rectangle left = GetLeftScrollRect (tab);\r
 298                                 DrawScrollButton (dc, right, area, ScrollButton.Right, tab.RightSliderState);\r
 299                                 DrawScrollButton (dc, left, area, ScrollButton.Left, tab.LeftSliderState);\r
 300                         }\r
 301                 }\r
 302 \r
 303                 protected virtual void DrawScrollButton (Graphics dc, Rectangle bounds, Rectangle clippingArea, ScrollButton button, PushButtonState state)\r
 304                 {\r
 305                         ControlPaint.DrawScrollButton (dc, bounds, button, GetButtonState (state));\r
 306                 }\r
 307 \r
 308                 static ButtonState GetButtonState (PushButtonState state)\r
 309                 {\r
 310                         switch (state) {\r
 311                         case PushButtonState.Pressed:\r
 312                                 return ButtonState.Pushed;\r
 313                         default:\r
 314                                 return ButtonState.Normal;\r
 315                         }\r
 316                 }\r
 317 \r
 318                 protected virtual void DrawBackground (Graphics dc, Rectangle area, TabControl tab)\r
 319                 {\r
 320                         Brush brush = SystemBrushes.Control;\r
 321                         dc.FillRectangle (brush, area);\r
 322                         Rectangle panel_rect = GetTabPanelRect (tab);\r
 323 \r
 324                         if (tab.Appearance == TabAppearance.Normal) {\r
 325                                 ControlPaint.DrawBorder3D (dc, panel_rect, Border3DStyle.RaisedInner, Border3DSide.Left | Border3DSide.Top);\r
 326                                 ControlPaint.DrawBorder3D (dc, panel_rect, Border3DStyle.Raised, Border3DSide.Right | Border3DSide.Bottom);\r
 327                         }\r
 328                 }\r
 329 \r
 330                 protected virtual int DrawTab (Graphics dc, System.Windows.Forms.TabPage page, System.Windows.Forms.TabControl tab, Rectangle bounds, bool is_selected)\r
 331                 {\r
 332                         Rectangle interior;\r
 333                         int res = bounds.Width;\r
 334 \r
 335                         dc.FillRectangle (ResPool.GetSolidBrush (tab.BackColor), bounds);\r
 336 \r
 337                         if (tab.Appearance == TabAppearance.Buttons || tab.Appearance == TabAppearance.FlatButtons) {\r
 338                                 // Separators\r
 339                                 if (tab.Appearance == TabAppearance.FlatButtons) {\r
 340                                         int width = bounds.Width;\r
 341                                         bounds.Width += (flatButtonSpacing - 2);\r
 342                                         res = bounds.Width;\r
 343                                         if (tab.Alignment == TabAlignment.Top || tab.Alignment == TabAlignment.Bottom)\r
 344                                                 ThemeEngine.Current.CPDrawBorder3D (dc, bounds, Border3DStyle.Etched, Border3DSide.Right);\r
 345                                         else\r
 346                                                 ThemeEngine.Current.CPDrawBorder3D (dc, bounds, Border3DStyle.Etched, Border3DSide.Top);\r
 347                                         bounds.Width = width;\r
 348                                 }\r
 349 \r
 350                                 if (is_selected) {\r
 351                                         ThemeEngine.Current.CPDrawBorder3D (dc, bounds, Border3DStyle.Sunken, Border3DSide.Left | Border3DSide.Right | Border3DSide.Top | Border3DSide.Bottom);\r
 352                                 } else if (tab.Appearance != TabAppearance.FlatButtons) {\r
 353                                         ThemeEngine.Current.CPDrawBorder3D (dc, bounds, Border3DStyle.Raised, Border3DSide.Left | Border3DSide.Right | Border3DSide.Top | Border3DSide.Bottom);\r
 354                                 }\r
 355 \r
 356 \r
 357                         } else {\r
 358                                 CPColor cpcolor = ResPool.GetCPColor (tab.BackColor);\r
 359 \r
 360                                 Pen light = ResPool.GetPen (cpcolor.LightLight);\r
 361 \r
 362                                 switch (tab.Alignment) {\r
 363 \r
 364                                         case TabAlignment.Top:\r
 365 \r
 366                                                 dc.DrawLine (light, bounds.Left, bounds.Bottom - 1, bounds.Left, bounds.Top + 3);\r
 367                                                 dc.DrawLine (light, bounds.Left, bounds.Top + 3, bounds.Left + 2, bounds.Top);\r
 368                                                 dc.DrawLine (light, bounds.Left + 2, bounds.Top, bounds.Right - 3, bounds.Top);\r
 369 \r
 370                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Right - 2, bounds.Top + 1, bounds.Right - 2, bounds.Bottom - 1);\r
 371                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Right - 2, bounds.Top + 1, bounds.Right - 1, bounds.Top + 2);\r
 372                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Right - 1, bounds.Top + 2, bounds.Right - 1, bounds.Bottom - 1);\r
 373                                                 break;\r
 374 \r
 375                                         case TabAlignment.Bottom:\r
 376 \r
 377                                                 dc.DrawLine (light, bounds.Left, bounds.Top, bounds.Left, bounds.Bottom - 2);\r
 378                                                 dc.DrawLine (light, bounds.Left, bounds.Bottom - 2, bounds.Left + 3, bounds.Bottom);\r
 379                                                 \r
 380                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Left + 3, bounds.Bottom, bounds.Right - 3, bounds.Bottom);\r
 381                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Left + 3, bounds.Bottom - 1, bounds.Right - 3, bounds.Bottom - 1);\r
 382 \r
 383                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Right - 2, bounds.Bottom - 1, bounds.Right - 2, bounds.Top + 1);\r
 384                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Right - 2, bounds.Bottom - 1, bounds.Right - 1, bounds.Bottom - 2);\r
 385                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Right - 1, bounds.Bottom - 2, bounds.Right - 1, bounds.Top + 1);\r
 386 \r
 387                                                 break;\r
 388 \r
 389                                         case TabAlignment.Left:\r
 390 \r
 391                                                 dc.DrawLine (light, bounds.Left - 2, bounds.Top, bounds.Right, bounds.Top);\r
 392                                                 dc.DrawLine (light, bounds.Left, bounds.Top + 2, bounds.Left - 2, bounds.Top);\r
 393                                                 dc.DrawLine (light, bounds.Left, bounds.Top + 2, bounds.Left, bounds.Bottom - 2);\r
 394 \r
 395                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Left, bounds.Bottom - 2, bounds.Left + 2, bounds.Bottom - 1);\r
 396 \r
 397                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Left + 2, bounds.Bottom - 1, bounds.Right, bounds.Bottom - 1);\r
 398                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Left + 2, bounds.Bottom, bounds.Right, bounds.Bottom);\r
 399 \r
 400                                                 break;\r
 401 \r
 402                                         default: // TabAlignment.Right\r
 403 \r
 404                                                 dc.DrawLine (light, bounds.Left, bounds.Top, bounds.Right - 3, bounds.Top);\r
 405                                                 dc.DrawLine (light, bounds.Right - 3, bounds.Top, bounds.Right, bounds.Top + 3);\r
 406 \r
 407                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Right - 1, bounds.Top + 1, bounds.Right - 1, bounds.Bottom - 1);\r
 408                                                 dc.DrawLine (SystemPens.ControlDark, bounds.Left, bounds.Bottom - 1, bounds.Right - 2, bounds.Bottom - 1);\r
 409 \r
 410                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Right, bounds.Top + 3, bounds.Right, bounds.Bottom - 3);\r
 411                                                 dc.DrawLine (SystemPens.ControlDarkDark, bounds.Left, bounds.Bottom, bounds.Right - 3, bounds.Bottom);\r
 412 \r
 413                                                 break;\r
 414                                 }\r
 415                         }\r
 416 \r
 417                         interior = new Rectangle (bounds.Left + focusRectSpacing.X + borderThickness.Left, \r
 418                                 bounds.Top + focusRectSpacing.Y +  + borderThickness.Top,\r
 419                                 bounds.Width - (focusRectSpacing.X * 2) - borderThickness.Width + 1, \r
 420                                 bounds.Height - (focusRectSpacing.Y * 2) - borderThickness.Height);\r
 421 \r
 422                         if (tab.DrawMode == TabDrawMode.Normal && page.Text != null) {\r
 423                                 if (tab.Alignment == TabAlignment.Left) {\r
 424                                         dc.TranslateTransform (bounds.Left, bounds.Bottom);\r
 425                                         dc.RotateTransform (-90);\r
 426                                         dc.DrawString (page.Text, page.Font,\r
 427                                                 SystemBrushes.ControlText, \r
 428                                                 tab.Padding.X - 2, // drawstring adds some extra unwanted leading spaces, so trimming\r
 429                                                 tab.Padding.Y,\r
 430                                                 defaultFormatting);\r
 431                                         dc.ResetTransform ();\r
 432                                 } else if (tab.Alignment == TabAlignment.Right) {\r
 433                                         dc.TranslateTransform (bounds.Right, bounds.Top);\r
 434                                         dc.RotateTransform (90);\r
 435                                         dc.DrawString (page.Text, page.Font,\r
 436                                                 SystemBrushes.ControlText, \r
 437                                                 tab.Padding.X - 2, // drawstring adds some extra unwanted leading spaces, so trimming\r
 438                                                 tab.Padding.Y,\r
 439                                                 defaultFormatting);\r
 440                                         dc.ResetTransform ();\r
 441                                 } else {\r
 442                                         Rectangle str_rect = interior;\r
 443 \r
 444                                         if (tab.ImageList != null && page.ImageIndex >= 0 && page.ImageIndex < tab.ImageList.Images.Count) {\r
 445                                                 int image_y = interior.Y + (interior.Height - tab.ImageList.ImageSize.Height) / 2;\r
 446                                                 tab.ImageList.Draw (dc, new Point (interior.X, image_y), page.ImageIndex);\r
 447                                                 str_rect.X += tab.ImageList.ImageSize.Width + 2;\r
 448                                                 str_rect.Width -= tab.ImageList.ImageSize.Width + 2;\r
 449                                         }\r
 450                                         dc.DrawString (page.Text, page.Font,\r
 451                                                 SystemBrushes.ControlText,\r
 452                                                 str_rect, \r
 453                                                 defaultFormatting);\r
 454 \r
 455                                 }\r
 456                         } else if (page.Text != null) {\r
 457                                 DrawItemState state = DrawItemState.None;\r
 458                                 if (page == tab.SelectedTab)\r
 459                                         state |= DrawItemState.Selected;\r
 460                                 DrawItemEventArgs e = new DrawItemEventArgs (dc,\r
 461                                         tab.Font, bounds, tab.IndexForTabPage (page),\r
 462                                         state, page.ForeColor, page.BackColor);\r
 463                                 tab.OnDrawItemInternal (e);\r
 464                                 return res;\r
 465                         }\r
 466 \r
 467                         if (page.Parent.Focused && is_selected && tab.ShowFocusCues) {\r
 468                                 interior.Width -= 1;\r
 469                                 ThemeEngine.Current.CPDrawFocusRectangle (dc, interior, tab.ForeColor, tab.BackColor);\r
 470                         }\r
 471 \r
 472                         return res;\r
 473                 }\r
 474 \r
 475                 public virtual bool HasHotElementStyles (TabControl tabControl) {\r
 476                         return false;\r
 477                 }\r
 478         }\r
 479 }\r