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

   1 //
   2 // CheckBoxRenderer.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 Novell, Inc.
  24 //
  25 // Authors:
  26 //      Jonathan Pobst (monkey@jpobst.com)
  27 //
  28
  29 using System.Drawing;
  30 using System.Windows.Forms.VisualStyles;
  31
  32 namespace System.Windows.Forms
  33 {
  34         public sealed class CheckBoxRenderer
  35         {
  36                 private static bool always_use_visual_styles = false;
  37
  38                 #region Private Constructor
  39                 private CheckBoxRenderer () {}
  40                 #endregion
  41
  42                 #region Public Static Methods
  43                 public static void DrawCheckBox (Graphics g, Point glyphLocation, CheckBoxState state)
  44                 {
  45                         DrawCheckBox (g, glyphLocation, Rectangle.Empty, String.Empty, null, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, false, state);
  46                 }
  47
  48                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, bool focused, CheckBoxState state)
  49                 {
  50                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, focused, state);
  51                 }
  52
  53                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, bool focused, CheckBoxState state)
  54                 {
  55                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, flags, null, Rectangle.Empty, focused, state);
  56                 }
  57
  58                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, Image image, Rectangle imageBounds, bool focused, CheckBoxState state)
  59                 {
  60                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter, image, imageBounds, focused, state);
  61                 }
  62
  63                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, Image image, Rectangle imageBounds, bool focused, CheckBoxState state)
  64                 {
  65                         Rectangle bounds = new Rectangle (glyphLocation, GetGlyphSize (g, state));
  66
  67                         if (Application.RenderWithVisualStyles || always_use_visual_styles == true) {
  68                                 VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
  69
  70                                 vsr.DrawBackground (g, bounds);
  71
  72                                 if (image != null)
  73                                         vsr.DrawImage (g, imageBounds, image);
  74
  75                                 if (focused)
  76                                         ControlPaint.DrawFocusRectangle (g, textBounds);
  77
  78                                 if (checkBoxText != String.Empty)
  79                                         if (state == CheckBoxState.CheckedDisabled || state == CheckBoxState.MixedDisabled || state == CheckBoxState.UncheckedDisabled)
  80                                                 TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.GrayText, flags);
  81                                         else
  82                                                 TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.ControlText, flags);
  83                         } else {
  84                                 switch (state) {
  85                                         case CheckBoxState.CheckedDisabled:
  86                                         case CheckBoxState.MixedDisabled:
  87                                         case CheckBoxState.MixedPressed:
  88                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Inactive | ButtonState.Checked);
  89                                                 break;
  90                                         case CheckBoxState.CheckedHot:
  91                                         case CheckBoxState.CheckedNormal:
  92                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Checked);
  93                                                 break;
  94                                         case CheckBoxState.CheckedPressed:
  95                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Pushed | ButtonState.Checked);
  96                                                 break;
  97                                         case CheckBoxState.MixedHot:
  98                                         case CheckBoxState.MixedNormal:
  99                                                 ControlPaint.DrawMixedCheckBox (g, bounds, ButtonState.Checked);
 100                                                 break;
 101                                         case CheckBoxState.UncheckedDisabled:
 102                                         case CheckBoxState.UncheckedPressed:
 103                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Inactive);
 104                                                 break;
 105                                         case CheckBoxState.UncheckedHot:
 106                                         case CheckBoxState.UncheckedNormal:
 107                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Normal);
 108                                                 break;
 109                                 }
 110
 111                                 if (image != null)
 112                                         g.DrawImage (image, imageBounds);
 113
 114                                 if (focused)
 115                                         ControlPaint.DrawFocusRectangle (g, textBounds);
 116
 117                                 if (checkBoxText != String.Empty)
 118                                         TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.ControlText, flags);
 119                         }
 120                 }
 121
 122                 public static bool IsBackgroundPartiallyTransparent (CheckBoxState state)
 123                 {
 124                         if (!VisualStyleRenderer.IsSupported)
 125                                 return false;
 126
 127                         VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
 128
 129                         return vsr.IsBackgroundPartiallyTransparent ();
 130                 }
 131
 132                 public static void DrawParentBackground (Graphics g, Rectangle bounds, Control childControl)
 133                 {
 134                         if (!VisualStyleRenderer.IsSupported)
 135                                 return;
 136
 137                         VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedNormal);
 138
 139                         vsr.DrawParentBackground (g, bounds, childControl);
 140                 }
 141
 142                 public static Size GetGlyphSize (Graphics g, CheckBoxState state)
 143                 {
 144                         if (!VisualStyleRenderer.IsSupported)
 145                                 return new Size (13, 13);
 146
 147                         VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
 148
 149                         return vsr.GetPartSize (g, ThemeSizeType.Draw);
 150                 }
 151                 #endregion
 152
 153                 #region Private Static Methods
 154                 private static VisualStyleRenderer GetCheckBoxRenderer (CheckBoxState state)
 155                 {
 156                         switch (state) {
 157                                 case CheckBoxState.CheckedDisabled:
 158                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedDisabled);
 159                                 case CheckBoxState.CheckedHot:
 160                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedHot);
 161                                 case CheckBoxState.CheckedNormal:
 162                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedNormal);
 163                                 case CheckBoxState.CheckedPressed:
 164                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedPressed);
 165                                 case CheckBoxState.MixedDisabled:
 166                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedDisabled);
 167                                 case CheckBoxState.MixedHot:
 168                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedHot);
 169                                 case CheckBoxState.MixedNormal:
 170                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedNormal);
 171                                 case CheckBoxState.MixedPressed:
 172                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedPressed);
 173                                 case CheckBoxState.UncheckedDisabled:
 174                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedDisabled);
 175                                 case CheckBoxState.UncheckedHot:
 176                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedHot);
 177                                 case CheckBoxState.UncheckedNormal:
 178                                 default:
 179                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedNormal);
 180                                 case CheckBoxState.UncheckedPressed:
 181                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedPressed);
 182                         }
 183                 }
 184                 #endregion
 185
 186                 #region Public Static Properties
 187                 public static bool RenderMatchingApplicationState {
 188                         get { return !always_use_visual_styles; }
 189                         set { always_use_visual_styles = !value; }
 190                 }
 191                 #endregion
 192         }
 193 }