class/System.Drawing/System.Drawing/Brush.cs

   1 //
   2 // System.Drawing.Brush.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Ravindra (rkumar@novell.com)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 // Copyright (C) 2004,2006-2007 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 namespace System.Drawing {
  32
  33         public abstract class Brush : MarshalByRefObject, ICloneable, IDisposable {
  34
  35                 internal IntPtr nativeObject;
  36
  37                 abstract public object Clone ();
  38
  39                 internal Brush (IntPtr ptr)
  40                 {
  41                         nativeObject = ptr;
  42                 }
  43
  44                 internal IntPtr NativeObject {
  45                         get {
  46                                 return nativeObject;
  47                         }
  48                         set {
  49                                 nativeObject = value;
  50                         }
  51                 }
  52
  53 #if NET_2_0
  54                 protected Brush ()
  55                 {
  56                 }
  57
  58                 protected internal void SetNativeBrush (IntPtr brush)
  59                 {
  60                         nativeObject = brush;
  61                 }
  62 #else
  63                 internal Brush ()
  64                 {
  65                 }
  66 #endif
  67
  68                 public void Dispose ()
  69                 {
  70                         Dispose (true);
  71                         System.GC.SuppressFinalize (this);
  72                 }
  73
  74                 protected virtual void Dispose (bool disposing)
  75                 {
  76                         // NOTE: this has been known to fail in the past (cairo)
  77                         // but it's the only way to reclaim brush related memory
  78                         if (nativeObject != IntPtr.Zero) {
  79                                 Status status = GDIPlus.GdipDeleteBrush (nativeObject);
  80                                 nativeObject = IntPtr.Zero;
  81                                 GDIPlus.CheckStatus (status);
  82                         }
  83                 }
  84
  85                 ~Brush ()
  86                 {
  87                         Dispose (false);
  88                 }
  89         }
  90 }