org.eclipse.swt.custom.CTabFolderLayout source code

1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 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.CTabFolderLayout;
14 
15 import java.lang.all;
16 
17 import org.eclipse.swt.SWT;
18 import org.eclipse.swt.graphics.GC;
19 import org.eclipse.swt.graphics.Point;
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.custom.CTabFolder;
24 import org.eclipse.swt.custom.CTabItem;
25 
26 /**
27  * This class provides the layout for CTabFolder
28  *
29  * @see CTabFolder
30  */
31 class CTabFolderLayout : Layout {
32 protected override Point computeSize(Composite composite, int wHint, int hHint, bool flushCache) {
33     CTabFolder folder = cast(CTabFolder)composite;
34     CTabItem[] items = folder.items;
35     // preferred width of tab area to show all tabs
36     int tabW = 0;
37     GC gc = new GC(folder);
38     for (int i = 0; i < items.length; i++) {
39         if (folder.single) {
40             tabW = Math.max(tabW, items[i].preferredWidth(gc, true, false));
41         } else {
42             tabW += items[i].preferredWidth(gc, i is folder.selectedIndex, false);
43         }
44     }
45     gc.dispose();
46     tabW += 3;
47     if (folder.showMax) tabW += CTabFolder.BUTTON_SIZE;
48     if (folder.showMin) tabW += CTabFolder.BUTTON_SIZE;
49     if (folder.single) tabW += 3*CTabFolder.BUTTON_SIZE/2; //chevron
50     if (folder.topRight !is null) {
51         Point pt = folder.topRight.computeSize(SWT.DEFAULT, folder.tabHeight, flushCache);
52         tabW += 3 + pt.x;
53     }
54     if (!folder.single && !folder.simple) tabW += folder.curveWidth - 2*folder.curveIndent;
55 
56     int controlW = 0;
57     int controlH = 0;
58     // preferred size of controls in tab items
59     for (int i = 0; i < items.length; i++) {
60         Control control = items[i].getControl();
61         if (control !is null && !control.isDisposed()){
62             Point size = control.computeSize (wHint, hHint, flushCache);
63             controlW = Math.max (controlW, size.x);
64             controlH = Math.max (controlH, size.y);
65         }
66     }
67 
68     int minWidth = Math.max(tabW, controlW);
69     int minHeight = (folder.minimized) ? 0 : controlH;
70     if (minWidth is 0) minWidth = CTabFolder.DEFAULT_WIDTH;
71     if (minHeight is 0) minHeight = CTabFolder.DEFAULT_HEIGHT;
72 
73     if (wHint !is SWT.DEFAULT) minWidth  = wHint;
74     if (hHint !is SWT.DEFAULT) minHeight = hHint;
75 
76     return new Point (minWidth, minHeight);
77 }
78 protected override bool flushCache(Control control) {
79     return true;
80 }
81 protected override void layout(Composite composite, bool flushCache) {
82     CTabFolder folder = cast(CTabFolder)composite;
83     // resize content
84     if (folder.selectedIndex !is -1) {
85         Control control = folder.items[folder.selectedIndex].getControl();
86         if (control !is null && !control.isDisposed()) {
87             control.setBounds(folder.getClientArea());
88         }
89     }
90 }
91 }