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 #if NET_2_0
  30 using System.Drawing;
  31 using System.Windows.Forms.VisualStyles;
  32
  33 namespace System.Windows.Forms
  34 {
  35         public sealed class ButtonRenderer
  36         {
  37                 private static bool always_use_visual_styles = false;
  38
  39                 #region Private Constructor
  40                 private ButtonRenderer () { }
  41                 #endregion
  42
  43                 #region Public Static Methods
  44                 public static void DrawButton (Graphics g, Rectangle bounds, PushButtonState state)
  45                 {
  46                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, null, Rectangle.Empty, false, state);
  47                 }
  48
  49                 public static void DrawButton (Graphics g, Rectangle bounds, bool focused, PushButtonState state)
  50                 {
  51                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, null, Rectangle.Empty, focused, state);
  52                 }
  53
  54                 public static void DrawButton (Graphics g, Rectangle bounds, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  55                 {
  56                         DrawButton (g, bounds, String.Empty, null, TextFormatFlags.Default, image, imageBounds, focused, state);
  57                 }
  58
  59                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, bool focused, PushButtonState state)
  60                 {
  61                         DrawButton (g, bounds, buttonText, font, TextFormatFlags.HorizontalCenter, null, Rectangle.Empty, focused, state);
  62                 }
  63
  64                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, TextFormatFlags flags, bool focused, PushButtonState state)
  65                 {
  66                         DrawButton (g, bounds, buttonText, font, flags, null, Rectangle.Empty, focused, state);
  67                 }
  68
  69                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  70                 {
  71                         DrawButton (g, bounds, buttonText, font, TextFormatFlags.HorizontalCenter, image, imageBounds, focused, state);
  72                 }
  73
  74                 public static void DrawButton (Graphics g, Rectangle bounds, string buttonText, Font font, TextFormatFlags flags, Image image, Rectangle imageBounds, bool focused, PushButtonState state)
  75                 {
  76                         if (Application.RenderWithVisualStyles || always_use_visual_styles == true) {
  77                                 VisualStyleRenderer vsr = GetPushButtonRenderer (state);
  78
  79                                 vsr.DrawBackground (g, bounds);
  80
  81                                 if (image != null)
  82                                         vsr.DrawImage (g, imageBounds, image);
  83                         } else {
  84                                 if (state == PushButtonState.Pressed)
  85                                         ControlPaint.DrawButton (g, bounds, ButtonState.Pushed);
  86                                 else
  87                                         ControlPaint.DrawButton (g, bounds, ButtonState.Normal);
  88
  89                                 if (image != null)
  90                                         g.DrawImage (image, imageBounds);
  91                         }
  92
  93                         Rectangle focus_rect = bounds;
  94                         focus_rect.Inflate (-3, -3);
  95
  96                         if (focused)
  97                                 ControlPaint.DrawFocusRectangle (g, focus_rect);
  98
  99                         if (buttonText != String.Empty)
 100                                 if (state == PushButtonState.Disabled)
 101                                         TextRenderer.DrawText (g, buttonText, font, focus_rect, SystemColors.GrayText, flags);
 102                                 else
 103                                         TextRenderer.DrawText (g, buttonText, font, focus_rect, SystemColors.ControlText, flags);
 104                 }
 105
 106                 public static bool IsBackgroundPartiallyTransparent (PushButtonState state)
 107                 {
 108                         if (!VisualStyleRenderer.IsSupported)
 109                                 return false;
 110
 111                         VisualStyleRenderer vsr = GetPushButtonRenderer (state);
 112
 113                         return vsr.IsBackgroundPartiallyTransparent ();
 114                 }
 115
 116                 public static void DrawParentBackground (Graphics g, Rectangle bounds, Control childControl)
 117                 {
 118                         if (!VisualStyleRenderer.IsSupported)
 119                                 return;
 120
 121                         VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Default);
 122
 123                         vsr.DrawParentBackground (g, bounds, childControl);
 124                 }
 125                 #endregion
 126
 127                 #region Private Static Methods
 128                 private static VisualStyleRenderer GetPushButtonRenderer (PushButtonState state)
 129                 {
 130                         switch (state) {
 131                                 case PushButtonState.Normal:
 132                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Normal);
 133                                 case PushButtonState.Hot:
 134                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Hot);
 135                                 case PushButtonState.Pressed:
 136                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Pressed);
 137                                 case PushButtonState.Disabled:
 138                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Disabled);
 139                                 case PushButtonState.Default:
 140                                 default:
 141                                         return new VisualStyleRenderer (VisualStyleElement.Button.PushButton.Default);
 142                         }
 143                 }
 144                 #endregion
 145
 146                 #region Public Static Properties
 147                 public static bool RenderMatchingApplicationState {
 148                         get { return !always_use_visual_styles; }
 149                         set { always_use_visual_styles = !value; }
 150                 }
 151                 #endregion
 152         }
 153 }
 154 #endif