1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.custom;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
/**
* This class provides the layout for CTabFolder
*
* @see CTabFolder
*/
class CTabFolderLayout extends Layout {
protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
CTabFolder folder = (CTabFolder)composite;
CTabItem[] items = folder.items;
CTabFolderRenderer renderer = folder.renderer;
// preferred width of tab area to show all tabs
int tabW = 0;
int selectedIndex = folder.selectedIndex;
if (selectedIndex == -1) selectedIndex = 0;
GC gc = new GC(folder);
for (int i = 0; i < items.length; i++) {
if (folder.single) {
tabW = Math.max(tabW, renderer.computeSize(i, SWT.SELECTED, gc, SWT.DEFAULT, SWT.DEFAULT).x);
} else {
int state = 0;
if (i == selectedIndex) state |= SWT.SELECTED;
tabW += renderer.computeSize(i, state, gc, SWT.DEFAULT, SWT.DEFAULT).x;
}
}
int width = 0, wrapHeight = 0;
boolean leftControl = false, rightControl = false;
if (wHint == SWT.DEFAULT) {
for (int i = 0; i < folder.controls.length; i++) {
Control control = folder.controls[i];
if (!control.isDisposed() && control.getVisible()) {
if ((folder.controlAlignments[i] & SWT.LEAD) != 0) {
leftControl = true;
} else {
rightControl = true;
}
width += control.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;
}
}
} else {
Point size = new Point (wHint, hHint);
boolean[][] positions = new boolean[1][];
Rectangle[] rects = folder.computeControlBounds(size, positions);
int minY = Integer.MAX_VALUE, maxY = 0;
for (int i = 0; i < rects.length; i++) {
if (positions[0][i]) {
minY = Math.min(minY, rects[i].y);
maxY = Math.max(maxY, rects[i].y + rects[i].height);
wrapHeight = maxY - minY;
} else {
if ((folder.controlAlignments[i] & SWT.LEAD) != 0) {
leftControl = true;
} else {
rightControl = true;
}
width += rects[i].width;
}
}
}
if (leftControl) width += CTabFolder.SPACING * 2;
if (rightControl) width += CTabFolder.SPACING * 2;
tabW += width;
gc.dispose();
int controlW = 0;
int controlH = 0;
// preferred size of controls in tab items
for (int i = 0; i < items.length; i++) {
Control control = items[i].control;
if (control != null && !control.isDisposed()){
Point size = control.computeSize (wHint, hHint, flushCache);
controlW = Math.max (controlW, size.x);
controlH = Math.max (controlH, size.y);
}
}
int minWidth = Math.max(tabW, controlW + folder.marginWidth);
int minHeight = (folder.minimized) ? 0 : controlH + wrapHeight;
if (minWidth == 0) minWidth = CTabFolder.DEFAULT_WIDTH;
if (minHeight == 0) minHeight = CTabFolder.DEFAULT_HEIGHT;
if (wHint != SWT.DEFAULT) minWidth = wHint;
if (hHint != SWT.DEFAULT) minHeight = hHint;
return new Point (minWidth, minHeight);
}
protected boolean flushCache(Control control) {
return true;
}
protected void layout(Composite composite, boolean flushCache) {
CTabFolder folder = (CTabFolder)composite;
// resize content
if (folder.selectedIndex != -1) {
Control control = folder.items[folder.selectedIndex].control;
if (control != null && !control.isDisposed()) {
control.setBounds(folder.getClientArea());
}
}
}
}
|
