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comparison snippets/tree/Snippet226.d @ 94:799099686955

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New tree snippet ports
author Bill Baxter <bill@billbaxter.com>
date Thu, 22 May 2008 13:47:53 +0900
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children 1f0a7a472680
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91:961ca8a76cad 94:799099686955
1 /*******************************************************************************
2 * Copyright (c) 2000, 2006 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 * D Port:
11 * Bill Baxter <wbaxter@gmail.com>
12 *******************************************************************************/
13 module snippets.tree.Snippet226;
14
15 /*
16 * Tree example snippet: Draw a custom gradient selection
17 *
18 * For a list of all SWT example snippets see
19 * http://www.eclipse.org/swt/snippets/
20 *
21 * @since 3.3
22 */
23 import dwt.DWT;
24 import dwt.graphics.GC;
25 import dwt.graphics.Rectangle;
26 import dwt.graphics.Region;
27 import dwt.graphics.Color;
28 import dwt.layout.FillLayout;
29 import dwt.widgets.Display;
30 import dwt.widgets.Shell;
31 import dwt.widgets.Tree;
32 import dwt.widgets.TreeItem;
33 import dwt.widgets.TreeColumn;
34 import dwt.widgets.Listener;
35 import dwt.widgets.Event;
36
37 import tango.util.Convert;
38
39 import dwt.dwthelper.utils;
40
41 void main()
42 {
43 final Display display = new Display();
44 Shell shell = new Shell(display);
45 shell.setText("Custom gradient selection for Tree");
46 shell.setLayout(new FillLayout());
47 final Tree tree = new Tree(shell, DWT.MULTI | DWT.FULL_SELECTION);
48 tree.setHeaderVisible(true);
49 tree.setLinesVisible(true);
50 int columnCount = 4;
51 for (int i=0; i<columnCount; i++) {
52 auto istr = to!(String)(i);
53 TreeColumn column = new TreeColumn(tree, DWT.NONE);
54 column.setText("Column " ~ istr);
55 }
56 int itemCount = 3;
57 for (int i=0; i<itemCount; i++) {
58 auto istr = to!(String)(i);
59 TreeItem item1 = new TreeItem(tree, DWT.NONE);
60 item1.setText("item "~istr);
61 for (int c=1; c < columnCount; c++) {
62 auto cstr = to!(String)(c);
63 item1.setText(c, "item ["~istr~"-"~cstr~"]");
64 }
65 for (int j=0; j<itemCount; j++) {
66 auto jstr = to!(String)(j);
67 TreeItem item2 = new TreeItem(item1, DWT.NONE);
68 item2.setText("item ["~istr~" "~jstr~"]");
69 for (int c=1; c<columnCount; c++) {
70 auto cstr = to!(String)(c);
71 item2.setText(c, "item ["~istr~" "~jstr~"-"~cstr~"]");
72 }
73 for (int k=0; k<itemCount; k++) {
74 auto kstr = to!(String)(k);
75 TreeItem item3 = new TreeItem(item2, DWT.NONE);
76 item3.setText("item ["~istr~" "~jstr~" "~kstr~"]");
77 for (int c=1; c<columnCount; c++) {
78 auto cstr = to!(String)(c);
79 item3.setText(c, "item ["~istr~" "~jstr~" "~kstr~"-"~cstr~"]");
80 }
81 }
82 }
83 }
84
85 /*
86 * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
87 * Therefore, it is critical for performance that these methods be
88 * as efficient as possible.
89 */
90 tree.addListener(DWT.EraseItem, new class Listener {
91 public void handleEvent(Event event) {
92 event.detail &= ~DWT.HOT;
93 if ((event.detail & DWT.SELECTED) != 0) {
94 GC gc = event.gc;
95 Rectangle area = tree.getClientArea();
96 /*
97 * If you wish to paint the selection beyond the end of
98 * last column, you must change the clipping region.
99 */
100 int columnCount = tree.getColumnCount();
101 if (event.index == columnCount - 1 || columnCount == 0) {
102 int width = area.x + area.width - event.x;
103 if (width > 0) {
104 Region region = new Region();
105 gc.getClipping(region);
106 region.add(event.x, event.y, width, event.height);
107 gc.setClipping(region);
108 region.dispose();
109 }
110 }
111 gc.setAdvanced(true);
112 if (gc.getAdvanced()) gc.setAlpha(127);
113 Rectangle rect = event.getBounds();
114 Color foreground = gc.getForeground();
115 Color background = gc.getBackground();
116 gc.setForeground(display.getSystemColor(DWT.COLOR_RED));
117 gc.setBackground(display.getSystemColor(DWT.COLOR_LIST_BACKGROUND));
118 gc.fillGradientRectangle(0, rect.y, 500, rect.height, false);
119 // restore colors for subsequent drawing
120 gc.setForeground(foreground);
121 gc.setBackground(background);
122 event.detail &= ~DWT.SELECTED;
123 }
124 }
125 });
126 for (int i=0; i<columnCount; i++) {
127 tree.getColumn(i).pack();
128 }
129 tree.setSelection(tree.getItem(0));
130 shell.setSize(500, 200);
131 shell.open();
132 while (!shell.isDisposed()) {
133 if (!display.readAndDispatch()) display.sleep();
134 }
135 display.dispose();
136 }