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

   1 // Permission is hereby granted, free of charge, to any person obtaining
   2 // a copy of this software and associated documentation files (the
   3 // "Software"), to deal in the Software without restriction, including
   4 // without limitation the rights to use, copy, modify, merge, publish,
   5 // distribute, sublicense, and/or sell copies of the Software, and to
   6 // permit persons to whom the Software is furnished to do so, subject to
   7 // the following conditions:
   8 //
   9 // The above copyright notice and this permission notice shall be
  10 // included in all copies or substantial portions of the Software.
  11 //
  12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  19 //
  20 // Copyright (c) 2004 Novell, Inc.
  21 //
  22 // Authors:
  23 //      Peter Bartok    pbartok@novell.com
  24 //
  25
  26
  27 // COMPLETE
  28
  29 using System.Drawing;
  30
  31 namespace System.Windows.Forms {
  32         public class PaintEventArgs : EventArgs, IDisposable {
  33                 private Graphics        graphics;
  34                 private Rectangle       clip_rectangle;
  35                 internal bool           Handled;
  36                 private bool            disposed;
  37
  38                 #region Public Constructors
  39                 public PaintEventArgs (Graphics graphics, Rectangle clipRect)
  40                 {
  41 #if NET_2_0
  42                         if (graphics == null)
  43                                 throw new ArgumentNullException ("graphics");
  44 #endif
  45                         this.graphics=graphics;
  46                         this.clip_rectangle=clipRect;
  47                 }
  48                 #endregion      // Public Constructors
  49
  50                 #region Public Instance Properties
  51                 public Rectangle ClipRectangle {
  52                         get {
  53                                 return this.clip_rectangle;
  54                         }
  55                         internal set {
  56                                 this.clip_rectangle = value;
  57                         }
  58                 }
  59
  60                 public Graphics Graphics {
  61                         get {
  62                                 return this.graphics;
  63                         }
  64                 }
  65                 #endregion      // Public Instance Properties
  66
  67                 #region Public Instance Methods
  68                 public void Dispose() {
  69                         Dispose(true);
  70                         GC.SuppressFinalize(this);
  71                 }
  72                 #endregion      // Public Instance Methods
  73
  74                 // Returns the previous graphics
  75                 internal Graphics SetGraphics (Graphics g)
  76                 {
  77                         Graphics res = graphics;
  78                         graphics = g;
  79
  80                         return res;
  81                 }
  82
  83                 #region Protected Instance Methods
  84                 ~PaintEventArgs() {
  85                         Dispose(false);
  86                 }
  87
  88                 protected virtual void Dispose (bool disposing)
  89                 {
  90                         if (!disposed) {
  91                                 if (graphics != null)
  92                                         graphics.Dispose ();
  93                                 disposed = true;
  94                         }
  95                 }
  96                 #endregion      // Protected Instance Methods
  97         }
  98 }