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comparison examples/layouts/borderlayout/borderlayout.d @ 118:c28c0340fdf3

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add borderlayout example
author mandel
date Thu, 04 Jun 2009 21:29:08 +0000
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children 6aeaf24018d7
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117:670414f31f5f 118:c28c0340fdf3
1 /****************************************************************************
2 **
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: Qt Software Information (qt-info@nokia.com)
5 **
6 ** This file is part of the examples of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial Usage
10 ** Licensees holding valid Qt Commercial licenses may use this file in
11 ** accordance with the Qt Commercial License Agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Nokia.
14 **
15 ** GNU Lesser General Public License Usage
16 ** Alternatively, this file may be used under the terms of the GNU Lesser
17 ** General Public License version 2.1 as published by the Free Software
18 ** Foundation and appearing in the file LICENSE.LGPL included in the
19 ** packaging of this file. Please review the following information to
20 ** ensure the GNU Lesser General Public License version 2.1 requirements
21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22 **
23 ** In addition, as a special exception, Nokia gives you certain
24 ** additional rights. These rights are described in the Nokia Qt LGPL
25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26 ** package.
27 **
28 ** GNU General Public License Usage
29 ** Alternatively, this file may be used under the terms of the GNU
30 ** General Public License version 3.0 as published by the Free Software
31 ** Foundation and appearing in the file LICENSE.GPL included in the
32 ** packaging of this file. Please review the following information to
33 ** ensure the GNU General Public License version 3.0 requirements will be
34 ** met: http://www.gnu.org/copyleft/gpl.html.
35 **
36 ** If you are unsure which license is appropriate for your use, please
37 ** contact the sales department at qt-sales@nokia.com.
38 ** $QT_END_LICENSE$
39 **
40 ****************************************************************************/
41 module borderlayout;
42
43
44 import qt.gui.QLayout;
45 import qt.gui.QWidgetItem;
46 import qt.gui.QTextBrowser;
47 import qt.core.QSize;
48 import qt.core.QRect;
49
50
51 class BorderLayout : public QLayout
52 {
53 public:
54
55 enum Position { West, North, South, East, Center };
56
57 this(QWidget parent, int margin = 0, int spacing = -1)
58 {
59 super(parent);
60 setMargin(margin);
61 setWidgetSpacing(spacing);
62 }
63
64 this(int spacing = -1)
65 {
66 setWidgetSpacing(spacing);
67 }
68
69 ~this()
70 {
71 QLayoutItem l = takeAt(0);
72 while (l) {
73 delete l;
74 l = takeAt(0);
75 }
76 }
77
78 void addItem(IQLayoutItem item)
79 {
80 add(item, Position.West);
81 }
82
83 void addWidget(QWidget widget, Position position)
84 {
85 add(cast(IQLayoutItem) new QWidgetItem(widget), position);
86 }
87
88 int expandingDirections()
89 {
90 return Qt.Horizontal | Qt.Vertical;
91 }
92
93 bool hasHeightForWidth()
94 {
95 return false;
96 }
97
98 int count()
99 {
100 return list.length;
101 }
102
103 QLayoutItem itemAt(int index)
104 {
105 if(index >= 0 && index < list.length)
106 return list[index].item;
107 else
108 return null;
109 }
110
111 QSize minimumSize()
112 {
113 return calculateSize(SizeType.MinimumSize);
114 }
115
116 void setGeometry(QRect rect)
117 {
118 ItemWrapper center = null;
119 int eastWidth = 0;
120 int westWidth = 0;
121 int northHeight = 0;
122 int southHeight = 0;
123 int centerHeight = 0;
124 int i;
125
126 super.setGeometry(rect);
127
128 for (i = 0; i < list.length; ++i) {
129 ItemWrapper wrapper = list[i];
130 IQLayoutItem item = wrapper.item;
131 Position position = wrapper.position;
132
133 if (position == Position.North) {
134 item.setGeometry(QRect(rect.x(), northHeight, rect.width(),
135 item.sizeHint().height()));
136
137 northHeight += item.geometry().height() + widgetSpacing();
138 } else if (position == Position.South) {
139 item.setGeometry(QRect(item.geometry().x(),
140 item.geometry().y(), rect.width(),
141 item.sizeHint().height()));
142
143 southHeight += item.geometry().height() + widgetSpacing();
144
145 item.setGeometry(QRect(rect.x(),
146 rect.y() + rect.height() - southHeight + widgetSpacing(),
147 item.geometry().width(),
148 item.geometry().height()));
149 } else if (position == Position.Center) {
150 center = wrapper;
151 }
152 }
153
154 centerHeight = rect.height() - northHeight - southHeight;
155
156 for (i = 0; i < list.length; ++i) {
157 ItemWrapper wrapper = list[i];
158 IQLayoutItem item = wrapper.item;
159 Position position = wrapper.position;
160
161 if (position == Position.West) {
162 item.setGeometry(QRect(rect.x() + westWidth, northHeight,
163 item.sizeHint().width(), centerHeight));
164
165 westWidth += item.geometry().width() + widgetSpacing();
166 } else if (position == Position.East) {
167 item.setGeometry(QRect(item.geometry().x(), item.geometry().y(),
168 item.sizeHint().width(), centerHeight));
169
170 eastWidth += item.geometry().width() + widgetSpacing();
171
172 item.setGeometry(QRect(
173 rect.x() + rect.width() - eastWidth + widgetSpacing(),
174 northHeight, item.geometry().width(),
175 item.geometry().height()));
176 }
177 }
178
179 if (center)
180 center.item.setGeometry(QRect(westWidth, northHeight,
181 rect.width() - eastWidth - westWidth,
182 centerHeight));
183 }
184
185 QSize sizeHint()
186 {
187 return calculateSize(SizeType.SizeHint);
188 }
189
190 QLayoutItem takeAt(int index)
191 {
192 if (index >= 0 && index < list.length) {
193 ItemWrapper layoutStruct = list[index];
194 return layoutStruct.item;
195 }
196 return null;
197 }
198
199 void add(IQLayoutItem item, Position position)
200 {
201 list ~= new ItemWrapper(item, position);
202 }
203
204 private:
205
206 class ItemWrapper
207 {
208 this(IQLayoutItem i, Position p)
209 {
210 item = i;
211 position = p;
212 }
213
214 IQLayoutItem item;
215 Position position;
216 };
217
218 enum SizeType { MinimumSize, SizeHint };
219
220 QSize calculateSize(SizeType sizeType)
221 {
222 QSize totalSize;
223
224 for (int i = 0; i < list.length; ++i) {
225 ItemWrapper wrapper = list[i];
226 Position position = wrapper.position;
227 QSize itemSize;
228
229 if (sizeType == SizeType.MinimumSize)
230 itemSize = wrapper.item.minimumSize();
231 else // (sizeType == SizeHint)
232 itemSize = wrapper.item.sizeHint();
233
234 if (position == Position.North || position == Position.South || position == Position.Center)
235 totalSize.setHeight(totalSize.height + itemSize.height);
236
237 if (position == Position.West || position == Position.East || position == Position.Center)
238 totalSize.setWidth(totalSize.width + itemSize.width);
239 }
240 return totalSize;
241 }
242
243 ItemWrapper[] list;
244 }