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 #if NET_2_0
  35         public
  36 #endif
  37         sealed class CheckBoxRenderer
  38         {
  39                 private static bool always_use_visual_styles = false;
  40
  41                 #region Private Constructor
  42                 private CheckBoxRenderer () {}
  43                 #endregion
  44
  45                 #region Public Static Methods
  46                 public static void DrawCheckBox (Graphics g, Point glyphLocation, CheckBoxState state)
  47                 {
  48                         DrawCheckBox (g, glyphLocation, Rectangle.Empty, String.Empty, null, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, false, state);
  49                 }
  50
  51                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, bool focused, CheckBoxState state)
  52                 {
  53                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, focused, state);
  54                 }
  55
  56                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, bool focused, CheckBoxState state)
  57                 {
  58                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, flags, null, Rectangle.Empty, focused, state);
  59                 }
  60
  61                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, Image image, Rectangle imageBounds, bool focused, CheckBoxState state)
  62                 {
  63                         DrawCheckBox (g, glyphLocation, textBounds, checkBoxText, font, TextFormatFlags.HorizontalCenter, image, imageBounds, focused, state);
  64                 }
  65
  66                 public static void DrawCheckBox (Graphics g, Point glyphLocation, Rectangle textBounds, string checkBoxText, Font font, TextFormatFlags flags, Image image, Rectangle imageBounds, bool focused, CheckBoxState state)
  67                 {
  68                         Rectangle bounds = new Rectangle (glyphLocation, GetGlyphSize (g, state));
  69
  70                         if (Application.RenderWithVisualStyles || always_use_visual_styles == true) {
  71                                 VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
  72
  73                                 vsr.DrawBackground (g, bounds);
  74
  75                                 if (image != null)
  76                                         vsr.DrawImage (g, imageBounds, image);
  77
  78                                 if (focused)
  79                                         ControlPaint.DrawFocusRectangle (g, textBounds);
  80
  81                                 if (checkBoxText != String.Empty)
  82                                         if (state == CheckBoxState.CheckedDisabled || state == CheckBoxState.MixedDisabled || state == CheckBoxState.UncheckedDisabled)
  83                                                 TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.GrayText, flags);
  84                                         else
  85                                                 TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.ControlText, flags);
  86                         } else {
  87                                 switch (state) {
  88                                         case CheckBoxState.CheckedDisabled:
  89                                         case CheckBoxState.MixedDisabled:
  90                                         case CheckBoxState.MixedPressed:
  91                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Inactive | ButtonState.Checked);
  92                                                 break;
  93                                         case CheckBoxState.CheckedHot:
  94                                         case CheckBoxState.CheckedNormal:
  95                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Checked);
  96                                                 break;
  97                                         case CheckBoxState.CheckedPressed:
  98                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Pushed | ButtonState.Checked);
  99                                                 break;
 100                                         case CheckBoxState.MixedHot:
 101                                         case CheckBoxState.MixedNormal:
 102                                                 ControlPaint.DrawMixedCheckBox (g, bounds, ButtonState.Checked);
 103                                                 break;
 104                                         case CheckBoxState.UncheckedDisabled:
 105                                         case CheckBoxState.UncheckedPressed:
 106                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Inactive);
 107                                                 break;
 108                                         case CheckBoxState.UncheckedHot:
 109                                         case CheckBoxState.UncheckedNormal:
 110                                                 ControlPaint.DrawCheckBox (g, bounds, ButtonState.Normal);
 111                                                 break;
 112                                 }
 113
 114                                 if (image != null)
 115                                         g.DrawImage (image, imageBounds);
 116
 117                                 if (focused)
 118                                         ControlPaint.DrawFocusRectangle (g, textBounds);
 119
 120                                 if (checkBoxText != String.Empty)
 121                                         TextRenderer.DrawText (g, checkBoxText, font, textBounds, SystemColors.ControlText, flags);
 122                         }
 123                 }
 124
 125                 public static bool IsBackgroundPartiallyTransparent (CheckBoxState state)
 126                 {
 127                         if (!VisualStyleRenderer.IsSupported)
 128                                 return false;
 129
 130                         VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
 131
 132                         return vsr.IsBackgroundPartiallyTransparent ();
 133                 }
 134
 135                 public static void DrawParentBackground (Graphics g, Rectangle bounds, Control childControl)
 136                 {
 137                         if (!VisualStyleRenderer.IsSupported)
 138                                 return;
 139
 140                         VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedNormal);
 141
 142                         vsr.DrawParentBackground (g, bounds, childControl);
 143                 }
 144
 145                 public static Size GetGlyphSize (Graphics g, CheckBoxState state)
 146                 {
 147                         if (!VisualStyleRenderer.IsSupported)
 148                                 return new Size (13, 13);
 149
 150                         VisualStyleRenderer vsr = GetCheckBoxRenderer (state);
 151
 152                         return vsr.GetPartSize (g, ThemeSizeType.Draw);
 153                 }
 154                 #endregion
 155
 156                 #region Private Static Methods
 157                 private static VisualStyleRenderer GetCheckBoxRenderer (CheckBoxState state)
 158                 {
 159                         switch (state) {
 160                                 case CheckBoxState.CheckedDisabled:
 161                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedDisabled);
 162                                 case CheckBoxState.CheckedHot:
 163                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedHot);
 164                                 case CheckBoxState.CheckedNormal:
 165                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedNormal);
 166                                 case CheckBoxState.CheckedPressed:
 167                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.CheckedPressed);
 168                                 case CheckBoxState.MixedDisabled:
 169                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedDisabled);
 170                                 case CheckBoxState.MixedHot:
 171                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedHot);
 172                                 case CheckBoxState.MixedNormal:
 173                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedNormal);
 174                                 case CheckBoxState.MixedPressed:
 175                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.MixedPressed);
 176                                 case CheckBoxState.UncheckedDisabled:
 177                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedDisabled);
 178                                 case CheckBoxState.UncheckedHot:
 179                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedHot);
 180                                 case CheckBoxState.UncheckedNormal:
 181                                 default:
 182                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedNormal);
 183                                 case CheckBoxState.UncheckedPressed:
 184                                         return new VisualStyleRenderer (VisualStyleElement.Button.CheckBox.UncheckedPressed);
 185                         }
 186                 }
 187                 #endregion
 188
 189                 #region Public Static Properties
 190                 public static bool RenderMatchingApplicationState {
 191                         get { return !always_use_visual_styles; }
 192                         set { always_use_visual_styles = !value; }
 193                 }
 194                 #endregion
 195         }
 196 }