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comparison org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/dnd/TreeDragSourceEffect.d @ 0:6dd524f61e62

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add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
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-1:000000000000 0:6dd524f61e62
1 /*******************************************************************************
2 * Copyright (c) 2007, 2008 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.swt.dnd.TreeDragSourceEffect;
14
15 import org.eclipse.swt.SWT;
16 import org.eclipse.swt.graphics.Image;
17 import org.eclipse.swt.graphics.ImageData;
18 import org.eclipse.swt.graphics.PaletteData;
19 import org.eclipse.swt.graphics.Rectangle;
20 import org.eclipse.swt.internal.win32.OS;
21 import org.eclipse.swt.widgets.Display;
22 import org.eclipse.swt.widgets.Tree;
23 import org.eclipse.swt.widgets.TreeItem;
24
25 import org.eclipse.swt.dnd.DragSourceEffect;
26 import org.eclipse.swt.dnd.DragSourceEvent;
27
28 import java.lang.all;
29
30 /**
31 * This class provides default implementations to display a source image
32 * when a drag is initiated from a <code>Tree</code>.
33 *
34 * <p>Classes that wish to provide their own source image for a <code>Tree</code> can
35 * extend <code>TreeDragSourceEffect</code> class and override the <code>TreeDragSourceEffect.dragStart</code>
36 * method and set the field <code>DragSourceEvent.image</code> with their own image.</p>
37 *
38 * Subclasses that override any methods of this class must call the corresponding
39 * <code>super</code> method to get the default drag under effect implementation.
40 *
41 * @see DragSourceEffect
42 * @see DragSourceEvent
43 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
44 *
45 * @since 3.3
46 */
47 public class TreeDragSourceEffect : DragSourceEffect {
48 Image dragSourceImage = null;
49
50 /**
51 * Creates a new <code>TreeDragSourceEffect</code> to handle drag effect
52 * from the specified <code>Tree</code>.
53 *
54 * @param tree the <code>Tree</code> that the user clicks on to initiate the drag
55 */
56 public this(Tree tree) {
57 super(tree);
58 }
59
60 /**
61 * This implementation of <code>dragFinished</code> disposes the image
62 * that was created in <code>TreeDragSourceEffect.dragStart</code>.
63 *
64 * Subclasses that override this method should call <code>super.dragFinished(event)</code>
65 * to dispose the image in the default implementation.
66 *
67 * @param event the information associated with the drag finished event
68 */
69 public void dragFinished(DragSourceEvent event) {
70 if (dragSourceImage !is null) dragSourceImage.dispose();
71 dragSourceImage = null;
72 }
73
74 /**
75 * This implementation of <code>dragStart</code> will create a default
76 * image that will be used during the drag. The image should be disposed
77 * when the drag is completed in the <code>TreeDragSourceEffect.dragFinished</code>
78 * method.
79 *
80 * Subclasses that override this method should call <code>super.dragStart(event)</code>
81 * to use the image from the default implementation.
82 *
83 * @param event the information associated with the drag start event
84 */
85 public void dragStart(DragSourceEvent event) {
86 event.image = getDragSourceImage(event);
87 }
88
89 Image getDragSourceImage(DragSourceEvent event) {
90 if (dragSourceImage !is null) dragSourceImage.dispose();
91 dragSourceImage = null;
92 if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (5, 1)) {
93 SHDRAGIMAGE shdi;
94 int DI_GETDRAGIMAGE = OS.RegisterWindowMessage ("ShellGetDragImage"w.ptr); //$NON-NLS-1$
95 if (OS.SendMessage (control.handle, DI_GETDRAGIMAGE, 0, &shdi) !is 0) {
96 if ((control.getStyle() & SWT.MIRRORED) !is 0) {
97 event.x += shdi.sizeDragImage.cx - shdi.ptOffset.x;
98 } else {
99 event.x += shdi.ptOffset.x;
100 }
101 event.y += shdi.ptOffset.y;
102 auto hImage = shdi.hbmpDragImage;
103 if (hImage !is null) {
104 BITMAP bm;
105 OS.GetObject (hImage, BITMAP.sizeof, &bm);
106 int srcWidth = bm.bmWidth;
107 int srcHeight = bm.bmHeight;
108
109 /* Create resources */
110 auto hdc = OS.GetDC (null);
111 auto srcHdc = OS.CreateCompatibleDC (hdc);
112 auto oldSrcBitmap = OS.SelectObject (srcHdc, hImage);
113 auto memHdc = OS.CreateCompatibleDC (hdc);
114 BITMAPINFOHEADER bmiHeader;
115 bmiHeader.biSize = BITMAPINFOHEADER.sizeof;
116 bmiHeader.biWidth = srcWidth;
117 bmiHeader.biHeight = -srcHeight;
118 bmiHeader.biPlanes = 1;
119 bmiHeader.biBitCount = 32;
120 bmiHeader.biCompression = OS.BI_RGB;
121 void* pBits;
122 auto memDib = OS.CreateDIBSection (null, cast(BITMAPINFO*)&bmiHeader, OS.DIB_RGB_COLORS, &pBits, null, 0);
123 if (memDib is null) SWT.error (SWT.ERROR_NO_HANDLES);
124 auto oldMemBitmap = OS.SelectObject (memHdc, memDib);
125
126 BITMAP dibBM;
127 OS.GetObject (memDib, BITMAP.sizeof, &dibBM);
128 int sizeInBytes = dibBM.bmWidthBytes * dibBM.bmHeight;
129
130 /* Get the foreground pixels */
131 OS.BitBlt (memHdc, 0, 0, srcWidth, srcHeight, srcHdc, 0, 0, OS.SRCCOPY);
132 byte[] srcData = (cast(byte*)dibBM.bmBits)[ 0 .. sizeInBytes ];
133
134 PaletteData palette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000);
135 ImageData data = new ImageData(srcWidth, srcHeight, bm.bmBitsPixel, palette, bm.bmWidthBytes, srcData);
136 if (shdi.crColorKey is -1) {
137 byte[] alphaData = new byte[srcWidth * srcHeight];
138 int spinc = dibBM.bmWidthBytes - srcWidth * 4;
139 int ap = 0, sp = 3;
140 for (int y = 0; y < srcHeight; ++y) {
141 for (int x = 0; x < srcWidth; ++x) {
142 alphaData [ap++] = srcData [sp];
143 sp += 4;
144 }
145 sp += spinc;
146 }
147 data.alphaData = alphaData;
148 } else {
149 data.transparentPixel = shdi.crColorKey << 8;
150 }
151 dragSourceImage = new Image (control.getDisplay (), data);
152 OS.SelectObject (memHdc, oldMemBitmap);
153 OS.DeleteDC (memHdc);
154 OS.DeleteObject (memDib);
155 OS.SelectObject (srcHdc, oldSrcBitmap);
156 OS.DeleteDC (srcHdc);
157 OS.ReleaseDC (null, hdc);
158 OS.DeleteObject (hImage);
159 return dragSourceImage;
160 }
161 }
162 return null;
163 }
164
165 Tree tree = cast(Tree) control;
166 //TEMPORARY CODE
167 if (tree.isListening (SWT.EraseItem) || tree.isListening (SWT.PaintItem)) return null;
168 TreeItem[] selection = tree.getSelection();
169 if (selection.length is 0) return null;
170 auto treeImageList = OS.SendMessage (tree.handle, OS.TVM_GETIMAGELIST, OS.TVSIL_NORMAL, 0);
171 if (treeImageList !is 0) {
172 int count = Math.min(selection.length, 10);
173 Rectangle bounds = selection[0].getBounds(0);
174 for (int i = 1; i < count; i++) {
175 bounds = bounds.makeUnion(selection[i].getBounds(0));
176 }
177 auto hDC = OS.GetDC(tree.handle);
178 auto hDC1 = OS.CreateCompatibleDC(hDC);
179 auto bitmap = OS.CreateCompatibleBitmap(hDC, bounds.width, bounds.height);
180 auto hOldBitmap = OS.SelectObject(hDC1, bitmap);
181 RECT rect;
182 rect.right = bounds.width;
183 rect.bottom = bounds.height;
184 auto hBrush = OS.GetStockObject(OS.WHITE_BRUSH);
185 OS.FillRect(hDC1, &rect, hBrush);
186 for (int i = 0; i < count; i++) {
187 TreeItem selected = selection[i];
188 Rectangle cell = selected.getBounds(0);
189 HANDLE imageList = cast(HANDLE) OS.SendMessage(tree.handle, OS.TVM_CREATEDRAGIMAGE, 0, selected.handle);
190 OS.ImageList_Draw(imageList, 0, hDC1, cell.x - bounds.x, cell.y - bounds.y, OS.ILD_SELECTED);
191 OS.ImageList_Destroy(imageList);
192 }
193 OS.SelectObject(hDC1, hOldBitmap);
194 OS.DeleteDC (hDC1);
195 OS.ReleaseDC (tree.handle, hDC);
196 Display display = tree.getDisplay();
197 dragSourceImage = Image.win32_new(display, SWT.BITMAP, bitmap);
198 return dragSourceImage;
199 }
200 return null;
201 }
202 }