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

   1 //
   2 // ButtonRenderer.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 ButtonRenderer
  35         {
  36                 private static bool always_use_visual_styles = false;
  37
  38                 #region Private Constructor
  39                 private ButtonRenderer () { }
  40                 #endregion
  41
  42                 #region Public Static Methods
  43                 public static void DrawButton (Graphics g, Rectangle bounds, PushButtonState state)
  44                 {
  45                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, null, Rectangle.Empty, false, state);
  46                 }
  47
  48                 public static void DrawButton (Graphics g, Rectangle bounds, bool focused, PushButtonState state)
  49                 {
  50                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, null, Rectangle.Empty, focused, state);
  51                 }
  52
  53                 public static void DrawButton (Graphics g, Rectangle bounds, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  54                 {
  55                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, image, imageBounds, focused, state);
  56                 }
  57
  58                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, bool focused, PushButtonState state)
  59                 {
  60                         DrawButton (g, bounds, buttonText, font, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, focused, state);
  61                 }
  62
  63                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, TextFormatFlags flags, bool focused, PushButtonState state)
  64                 {
  65                         DrawButton (g, bounds, buttonText, font, flags, null, Rectangle.Empty, focused, state);
  66                 }
  67
  68                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  69                 {
  70                         DrawButton (g, bounds, buttonText, font, TextFormatFlags.HorizontalCenter, image, imageBounds, focused, state);
  71                 }
  72
  73                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, TextFormatFlags flags, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  74                 {
  75                         if (Application.RenderWithVisualStyles || always_use_visual_styles == true) {
  76                                 VisualStyleRenderer vsr = GetPushButtonRenderer (state);
  77
  78                                 vsr.DrawBackground (g, bounds);
  79
  80                                 if (image != null)
  81                                         vsr.DrawImage (g, imageBounds, image);
  82                         } else {
  83                                 if (state == PushButtonState.Pressed)
  84                                         ControlPaint.DrawButton (g, bounds, ButtonState.Pushed);
  85                                 else
  86                                         ControlPaint.DrawButton (g, bounds, ButtonState.Normal);
  87
  88                                 if (image != null)
  89                                         g.DrawImage (image, imageBounds);
  90                         }
  91
  92                         Rectangle focus_rect = bounds;
  93                         focus_rect.Inflate (-3, -3);
  94
  95                         if (focused)
  96                                 ControlPaint.DrawFocusRectangle (g, focus_rect);
  97
  98                         if (buttonText != String.Empty)
  99                                 if (state == PushButtonState.Disabled)
 100                                         TextRenderer.DrawText (g, buttonText, font, focus_rect, SystemColors.GrayText, flags);
 101                                 else
 102                                         TextRenderer.DrawText (g, buttonText, font, focus_rect, SystemColors.ControlText, flags);
 103                 }
 104
 105                 public static bool IsBackgroundPartiallyTransparent (PushButtonState state)
 106                 {
 107                         if (!VisualStyleRenderer.IsSupported)
 108                                 return false;
 109
 110                         VisualStyleRenderer vsr = GetPushButtonRenderer (state);
 111
 112                         return vsr.IsBackgroundPartiallyTransparent ();
 113                 }
 114
 115                 public static void DrawParentBackground (Graphics g, Rectangle bounds, Control childControl)
 116                 {
 117                         if (!VisualStyleRenderer.IsSupported)
 118                                 return;
 119
 120                         VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Default);
 121
 122                         vsr.DrawParentBackground (g, bounds, childControl);
 123                 }
 124                 #endregion
 125
 126                 #region Private Static Methods
 127                 internal static VisualStyleRenderer GetPushButtonRenderer (PushButtonState state)
 128                 {
 129                         switch (state) {
 130                                 case PushButtonState.Normal:
 131                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Normal);
 132                                 case PushButtonState.Hot:
 133                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Hot);
 134                                 case PushButtonState.Pressed:
 135                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Pressed);
 136                                 case PushButtonState.Disabled:
 137                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Disabled);
 138                                 case PushButtonState.Default:
 139                                 default:
 140                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Default);
 141                         }
 142                 }
 143                 #endregion
 144
 145                 #region Public Static Properties
 146                 public static bool RenderMatchingApplicationState {
 147                         get { return !always_use_visual_styles; }
 148                         set { always_use_visual_styles = !value; }
 149                 }
 150                 #endregion
 151         }
 152 }