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:
9 // The above copyright notice and this permission notice shall be
10 // included in all copies or substantial portions of the Software.
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.
20 // Copyright (c) 2004 Novell, Inc.
23 // Jackson Harper (jackson@ximian.com)
30 using System
.Collections
;
32 namespace System
.Windows
.Forms
{
34 internal class HandleData
: IDisposable
{
36 private Queue message_queue
;
37 private Rectangle invalid
= Rectangle
.Empty
;
39 private bool has_expose
;
41 #region Constructors and destructors
46 public void Dispose () {
51 #region Paint area handling
52 public Object DeviceContext
{
55 if (value is Graphics
) {
57 ((Graphics
)dc
).Dispose ();
64 public bool HasExpose
{
73 public Rectangle InvalidArea
{
78 public void AddToInvalidArea (int x
, int y
, int width
, int height
)
80 if (invalid
== Rectangle
.Empty
) {
81 invalid
= new Rectangle (x
, y
, width
, height
);
84 invalid
= Rectangle
.Union (invalid
, new Rectangle (x
, y
, width
, height
));
87 public void AddToInvalidArea (Rectangle r
)
89 if (invalid
== Rectangle
.Empty
) {
93 invalid
= Rectangle
.Union (invalid
, r
);
96 public void ClearInvalidArea ()
98 invalid
= Rectangle
.Empty
;
101 #endregion // Paint area methods
103 #region Message storage and retrieval
104 public bool MessageWaiting
{
106 if ((message_queue
== null) || (message_queue
.Count
== 0)) {
113 public bool GetMessage(ref MSG msg
) {
116 if ((message_queue
== null) || (message_queue
.Count
== 0)) {
120 message
= (MSG
)message_queue
.Dequeue();
126 public bool StoreMessage(ref MSG msg
) {
127 MSG message
= new MSG();
129 if (message_queue
== null) {
130 message_queue
= new Queue();
134 message_queue
.Enqueue(message
);
138 #endregion // Message storage and retrieval