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comparison dwt/custom/ViewFormLayout.d @ 0:380af2bdd8e5

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author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Sat, 09 Aug 2008 17:00:02 +0200
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-1:000000000000 0:380af2bdd8e5
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 *******************************************************************************/
11 module dwt.custom;
12
13 import dwt.*;
14 import dwt.graphics.*;
15 import dwt.widgets.*;
16
17 /**
18 * This class provides the layout for ViewForm
19 *
20 * @see ViewForm
21 */
22 class ViewFormLayout : Layout {
23
24 protected Point computeSize(Composite composite, int wHint, int hHint, bool flushCache) {
25 ViewForm form = (ViewForm)composite;
26 Control left = form.topLeft;
27 Control center = form.topCenter;
28 Control right = form.topRight;
29 Control content = form.content;
30
31 Point leftSize = new Point(0, 0);
32 if (left !is null) {
33 leftSize = computeChildSize(left, DWT.DEFAULT, DWT.DEFAULT, flushCache);
34 }
35 Point centerSize = new Point(0, 0);
36 if (center !is null) {
37 centerSize = computeChildSize(center, DWT.DEFAULT, DWT.DEFAULT, flushCache);
38 }
39 Point rightSize = new Point(0, 0);
40 if (right !is null) {
41 rightSize = computeChildSize(right, DWT.DEFAULT, DWT.DEFAULT, flushCache);
42 }
43 Point size = new Point(0, 0);
44 // calculate width of title bar
45 if (form.separateTopCenter ||
46 (wHint !is DWT.DEFAULT && leftSize.x + centerSize.x + rightSize.x > wHint)) {
47 size.x = leftSize.x + rightSize.x;
48 if (leftSize.x > 0 && rightSize.x > 0) size.x += form.horizontalSpacing;
49 size.x = Math.max(centerSize.x, size.x);
50 size.y = Math.max(leftSize.y, rightSize.y);
51 if (center !is null){
52 size.y += centerSize.y;
53 if (left !is null ||right !is null)size.y += form.verticalSpacing;
54 }
55 } else {
56 size.x = leftSize.x + centerSize.x + rightSize.x;
57 int count = -1;
58 if (leftSize.x > 0) count++;
59 if (centerSize.x > 0) count++;
60 if (rightSize.x > 0) count++;
61 if (count > 0) size.x += count * form.horizontalSpacing;
62 size.y = Math.max(leftSize.y, Math.max(centerSize.y, rightSize.y));
63 }
64
65 if (content !is null) {
66 if (left !is null || right !is null || center !is null) size.y += 1; // allow space for a vertical separator
67 Point contentSize = new Point(0, 0);
68 contentSize = computeChildSize(content, DWT.DEFAULT, DWT.DEFAULT, flushCache);
69 size.x = Math.max (size.x, contentSize.x);
70 size.y += contentSize.y;
71 if (size.y > contentSize.y) size.y += form.verticalSpacing;
72 }
73
74 size.x += 2*form.marginWidth;
75 size.y += 2*form.marginHeight;
76
77 if (wHint !is DWT.DEFAULT) size.x = wHint;
78 if (hHint !is DWT.DEFAULT) size.y = hHint;
79
80 return size;
81 }
82
83 Point computeChildSize(Control control, int wHint, int hHint, bool flushCache) {
84 Object data = control.getLayoutData();
85 if (data is null || !(data instanceof CLayoutData)) {
86 data = new CLayoutData();
87 control.setLayoutData(data);
88 }
89 return ((CLayoutData)data).computeSize(control, wHint, hHint, flushCache);
90 }
91
92 int computeTrim(Control c) {
93 if (c instanceof Scrollable) {
94 Rectangle rect = ((Scrollable) c).computeTrim (0, 0, 0, 0);
95 return rect.width;
96 }
97 return c.getBorderWidth () * 2;
98 }
99
100 protected bool flushCache(Control control) {
101 Object data = control.getLayoutData();
102 if (data !is null && data instanceof CLayoutData) ((CLayoutData)data).flushCache();
103 return true;
104 }
105
106 protected void layout(Composite composite, bool flushCache) {
107 ViewForm form = (ViewForm)composite;
108 Control left = form.topLeft;
109 Control center = form.topCenter;
110 Control right = form.topRight;
111 Control content = form.content;
112
113 Rectangle rect = composite.getClientArea();
114
115 Point leftSize = new Point(0, 0);
116 if (left !is null && !left.isDisposed()) {
117 leftSize = computeChildSize(left, DWT.DEFAULT, DWT.DEFAULT, flushCache);
118 }
119 Point centerSize = new Point(0, 0);
120 if (center !is null && !center.isDisposed()) {
121 centerSize = computeChildSize(center, DWT.DEFAULT, DWT.DEFAULT, flushCache);
122 }
123 Point rightSize = new Point(0, 0);
124 if (right !is null && !right.isDisposed()) {
125 rightSize = computeChildSize(right, DWT.DEFAULT, DWT.DEFAULT, flushCache);
126 }
127
128 int minTopWidth = leftSize.x + centerSize.x + rightSize.x + 2*form.marginWidth + 2*form.highlight;
129 int count = -1;
130 if (leftSize.x > 0) count++;
131 if (centerSize.x > 0) count++;
132 if (rightSize.x > 0) count++;
133 if (count > 0) minTopWidth += count * form.horizontalSpacing;
134
135 int x = rect.x + rect.width - form.marginWidth - form.highlight;
136 int y = rect.y + form.marginHeight + form.highlight;
137
138 bool top = false;
139 if (form.separateTopCenter || minTopWidth > rect.width) {
140 int topHeight = Math.max(rightSize.y, leftSize.y);
141 if (right !is null && !right.isDisposed()) {
142 top = true;
143 x -= rightSize.x;
144 right.setBounds(x, y, rightSize.x, topHeight);
145 x -= form.horizontalSpacing;
146 }
147 if (left !is null && !left.isDisposed()) {
148 top = true;
149 int trim = computeTrim(left);
150 int leftW = x - rect.x - form.marginWidth - form.highlight - trim;
151 leftSize = computeChildSize(left, leftW, DWT.DEFAULT, false);
152 left.setBounds(rect.x + form.marginWidth + form.highlight, y, leftSize.x, topHeight);
153 }
154 if (top) y += topHeight + form.verticalSpacing;
155 if (center !is null && !center.isDisposed()) {
156 top = true;
157 int trim = computeTrim(center);
158 int w = rect.width - 2*form.marginWidth - 2*form.highlight - trim;
159 centerSize = computeChildSize(center, w, DWT.DEFAULT, false);
160 center.setBounds(rect.x + rect.width - form.marginWidth - form.highlight - centerSize.x, y, centerSize.x, centerSize.y);
161 y += centerSize.y + form.verticalSpacing;
162 }
163 } else {
164 int topHeight = Math.max(rightSize.y, Math.max(centerSize.y, leftSize.y));
165 if (right !is null && !right.isDisposed()) {
166 top = true;
167 x -= rightSize.x;
168 right.setBounds(x, y, rightSize.x, topHeight);
169 x -= form.horizontalSpacing;
170 }
171 if (center !is null && !center.isDisposed()) {
172 top = true;
173 x -= centerSize.x;
174 center.setBounds(x, y, centerSize.x, topHeight);
175 x -= form.horizontalSpacing;
176 }
177 if (left !is null && !left.isDisposed()) {
178 top = true;
179 Rectangle trim = left instanceof Composite ? ((Composite)left).computeTrim(0, 0, 0, 0) : new Rectangle(0, 0, 0, 0);
180 int w = x - rect.x - form.marginWidth - form.highlight - trim.width;
181 int h = topHeight - trim.height;
182 leftSize = computeChildSize(left, w, h, false);
183 left.setBounds(rect.x + form.marginWidth + form.highlight, y, leftSize.x, topHeight);
184 }
185 if (top)y += topHeight + form.verticalSpacing;
186 }
187 int oldSeperator = form.separator;
188 form.separator = -1;
189 if (content !is null && !content.isDisposed()) {
190 if (left !is null || right!= null || center !is null){
191 form.separator = y;
192 y++;
193 }
194 content.setBounds(rect.x + form.marginWidth + form.highlight, y, rect.width - 2 * form.marginWidth - 2*form.highlight, rect.y + rect.height - y - form.marginHeight - form.highlight);
195 }
196 if (oldSeperator !is -1 && form.separator !is -1) {
197 int t = Math.min(form.separator, oldSeperator);
198 int b = Math.max(form.separator, oldSeperator);
199 form.redraw(form.borderLeft, t, form.getSize().x - form.borderLeft - form.borderRight, b - t, false);
200 }
201 }
202 }