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

   1 //
   2 // TextBoxRenderer.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 TextBoxRenderer
  35         {
  36                 #region Private Constructor
  37                 private TextBoxRenderer () { }
  38                 #endregion
  39
  40                 #region Public Static Methods
  41                 public static void DrawTextBox (Graphics g, Rectangle bounds, TextBoxState state)
  42                 {
  43                         DrawTextBox (g, bounds, String.Empty, null, Rectangle.Empty, TextFormatFlags.Default, state);
  44                 }
  45
  46                 public static void DrawTextBox (Graphics g, Rectangle bounds, string textBoxText, Font font, TextBoxState state)
  47                 {
  48                         DrawTextBox (g, bounds, textBoxText, font, Rectangle.Empty, TextFormatFlags.Default, state);
  49                 }
  50
  51                 public static void DrawTextBox (Graphics g, Rectangle bounds, string textBoxText, Font font, Rectangle textBounds, TextBoxState state)
  52                 {
  53                         DrawTextBox (g, bounds, textBoxText, font, textBounds, TextFormatFlags.Default, state);
  54                 }
  55
  56                 public static void DrawTextBox (Graphics g, Rectangle bounds, string textBoxText, Font font, TextFormatFlags flags, TextBoxState state)
  57                 {
  58                         DrawTextBox (g, bounds, textBoxText, font, Rectangle.Empty, flags, state);
  59                 }
  60
  61                 public static void DrawTextBox (Graphics g, Rectangle bounds, string textBoxText, Font font, Rectangle textBounds, TextFormatFlags flags, TextBoxState state)
  62                 {
  63                         if (!IsSupported)
  64                                 throw new InvalidOperationException ();
  65
  66                         VisualStyleRenderer vsr;
  67
  68                         switch (state) {
  69                                 case TextBoxState.Assist:
  70                                         vsr = new VisualStyleRenderer (VisualStyleElement.TextBox.TextEdit.Assist);
  71                                         break;
  72                                 case TextBoxState.Disabled:
  73                                         vsr = new VisualStyleRenderer (VisualStyleElement.TextBox.TextEdit.Disabled);
  74                                         break;
  75                                 case TextBoxState.Hot:
  76                                         vsr = new VisualStyleRenderer (VisualStyleElement.TextBox.TextEdit.Hot);
  77                                         break;
  78                                 case TextBoxState.Normal:
  79                                 case TextBoxState.Readonly:
  80                                 default:
  81                                         vsr = new VisualStyleRenderer (VisualStyleElement.TextBox.TextEdit.Normal);
  82                                         break;
  83                                 case TextBoxState.Selected:
  84                                         vsr = new VisualStyleRenderer (VisualStyleElement.TextBox.TextEdit.Selected);
  85                                         break;
  86                         }
  87
  88                         vsr.DrawBackground (g, bounds);
  89
  90                         if (textBounds == Rectangle.Empty)
  91                                 textBounds = new Rectangle (bounds.Left + 3, bounds.Top + 3, bounds.Width - 6, bounds.Height - 6);
  92
  93                         if (textBoxText != String.Empty)
  94                                 if (state == TextBoxState.Disabled)
  95                                         TextRenderer.DrawText (g, textBoxText, font, textBounds, SystemColors.GrayText, flags);
  96                                 else
  97                                         TextRenderer.DrawText (g, textBoxText, font, textBounds, SystemColors.ControlText, flags);
  98                 }
  99                 #endregion
 100
 101                 #region Public Static Properties
 102                 public static bool IsSupported {
 103                         get { return VisualStyleInformation.IsEnabledByUser && (Application.VisualStyleState == VisualStyleState.ClientAndNonClientAreasEnabled || Application.VisualStyleState == VisualStyleState.ClientAreaEnabled); }
 104                 }
 105                 #endregion
 106         }
 107 }