Mercurial > projects > dwt2
annotate org.eclipse.swt.gtk.linux.x86/src/org/eclipse/swt/custom/ScrolledCompositeLayout.d @ 125:c43718956f21 default tip
Updated the snippets status.
author | Jacob Carlborg <doob@me.com> |
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date | Thu, 11 Aug 2011 19:55:14 +0200 |
parents | 536e43f63c81 |
children |
rev | line source |
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25 | 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 * Port to the D programming language: | |
11 * Frank Benoit <benoit@tionex.de> | |
12 *******************************************************************************/ | |
13 module org.eclipse.swt.custom.ScrolledCompositeLayout; | |
14 | |
15 import java.lang.all; | |
16 | |
17 import org.eclipse.swt.SWT; | |
18 import org.eclipse.swt.graphics.Point; | |
19 import org.eclipse.swt.graphics.Rectangle; | |
20 import org.eclipse.swt.widgets.Composite; | |
21 import org.eclipse.swt.widgets.Control; | |
22 import org.eclipse.swt.widgets.Layout; | |
23 import org.eclipse.swt.widgets.ScrollBar; | |
24 import org.eclipse.swt.custom.ScrolledComposite; | |
25 | |
26 | |
27 /** | |
28 * This class provides the layout for ScrolledComposite | |
29 * | |
30 * @see ScrolledComposite | |
31 */ | |
32 class ScrolledCompositeLayout : Layout { | |
33 | |
34 bool inLayout = false; | |
49
7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
Frank Benoit <benoit@tionex.de>
parents:
25
diff
changeset
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35 static const int DEFAULT_WIDTH = 64; |
7a2dd761a8b2
more work until dmd 2.026 linux segfaults.
Frank Benoit <benoit@tionex.de>
parents:
25
diff
changeset
|
36 static const int DEFAULT_HEIGHT = 64; |
25 | 37 |
38 protected override Point computeSize(Composite composite, int wHint, int hHint, bool flushCache) { | |
39 ScrolledComposite sc = cast(ScrolledComposite)composite; | |
40 Point size = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT); | |
41 if (sc.content !is null) { | |
42 Point preferredSize = sc.content.computeSize(wHint, hHint, flushCache); | |
43 Point currentSize = sc.content.getSize(); | |
44 size.x = sc.getExpandHorizontal() ? preferredSize.x : currentSize.x; | |
45 size.y = sc.getExpandVertical() ? preferredSize.y : currentSize.y; | |
46 } | |
47 size.x = Math.max(size.x, sc.minWidth); | |
48 size.y = Math.max(size.y, sc.minHeight); | |
49 if (wHint !is SWT.DEFAULT) size.x = wHint; | |
50 if (hHint !is SWT.DEFAULT) size.y = hHint; | |
51 return size; | |
52 } | |
53 | |
54 protected override bool flushCache(Control control) { | |
55 return true; | |
56 } | |
57 | |
58 protected override void layout(Composite composite, bool flushCache) { | |
59 if (inLayout) return; | |
60 ScrolledComposite sc = cast(ScrolledComposite)composite; | |
61 if (sc.content is null) return; | |
62 ScrollBar hBar = sc.getHorizontalBar(); | |
63 ScrollBar vBar = sc.getVerticalBar(); | |
64 if (hBar !is null) { | |
65 if (hBar.getSize().y >= sc.getSize().y) { | |
66 return; | |
67 } | |
68 } | |
69 if (vBar !is null) { | |
70 if (vBar.getSize().x >= sc.getSize().x) { | |
71 return; | |
72 } | |
73 } | |
74 inLayout = true; | |
75 Rectangle contentRect = sc.content.getBounds(); | |
76 if (!sc.alwaysShowScroll) { | |
77 bool hVisible = sc.needHScroll(contentRect, false); | |
78 bool vVisible = sc.needVScroll(contentRect, hVisible); | |
79 if (!hVisible && vVisible) hVisible = sc.needHScroll(contentRect, vVisible); | |
80 if (hBar !is null) hBar.setVisible(hVisible); | |
81 if (vBar !is null) vBar.setVisible(vVisible); | |
82 } | |
83 Rectangle hostRect = sc.getClientArea(); | |
84 if (sc.expandHorizontal) { | |
85 contentRect.width = Math.max(sc.minWidth, hostRect.width); | |
86 } | |
87 if (sc.expandVertical) { | |
88 contentRect.height = Math.max(sc.minHeight, hostRect.height); | |
89 } | |
90 | |
91 if (hBar !is null) { | |
92 hBar.setMaximum (contentRect.width); | |
93 hBar.setThumb (Math.min (contentRect.width, hostRect.width)); | |
94 int hPage = contentRect.width - hostRect.width; | |
95 int hSelection = hBar.getSelection (); | |
96 if (hSelection >= hPage) { | |
97 if (hPage <= 0) { | |
98 hSelection = 0; | |
99 hBar.setSelection(0); | |
100 } | |
101 contentRect.x = -hSelection; | |
102 } | |
103 } | |
104 | |
105 if (vBar !is null) { | |
106 vBar.setMaximum (contentRect.height); | |
107 vBar.setThumb (Math.min (contentRect.height, hostRect.height)); | |
108 int vPage = contentRect.height - hostRect.height; | |
109 int vSelection = vBar.getSelection (); | |
110 if (vSelection >= vPage) { | |
111 if (vPage <= 0) { | |
112 vSelection = 0; | |
113 vBar.setSelection(0); | |
114 } | |
115 contentRect.y = -vSelection; | |
116 } | |
117 } | |
118 | |
119 sc.content.setBounds (contentRect); | |
120 inLayout = false; | |
121 } | |
122 } |