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comparison org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/custom/ScrolledCompositeLayout.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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children 6bf2837c50fe
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-1:000000000000 0:6dd524f61e62
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
16 import org.eclipse.swt.SWT;
17 import org.eclipse.swt.graphics.Point;
18 import org.eclipse.swt.graphics.Rectangle;
19 import org.eclipse.swt.widgets.Composite;
20 import org.eclipse.swt.widgets.Control;
21 import org.eclipse.swt.widgets.Layout;
22 import org.eclipse.swt.widgets.ScrollBar;
23 import org.eclipse.swt.custom.ScrolledComposite;
24
25 import Math = tango.math.Math;
26
27 /**
28 * This class provides the layout for ScrolledComposite
29 *
30 * @see ScrolledComposite
31 */
32 class ScrolledCompositeLayout : Layout {
33
34 bool inLayout = false;
35 static final int DEFAULT_WIDTH = 64;
36 static final int DEFAULT_HEIGHT = 64;
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 }