source: trunk/tools/designer/src/lib/shared/layoutinfo.cpp@ 561

Last change on this file since 561 was 561, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.1 sources.
File size: 10.0 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the Qt Designer of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this 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 have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "layoutinfo_p.h"
43
44#include <QtDesigner/QDesignerFormEditorInterface>
45#include <QtDesigner/QDesignerContainerExtension>
46#include <QtDesigner/QDesignerMetaDataBaseInterface>
47#include <QtDesigner/QExtensionManager>
48
49#include <QtGui/QHBoxLayout>
50#include <QtGui/QFormLayout>
51#include <QtGui/QSplitter>
52#include <QtCore/QDebug>
53#include <QtCore/QHash>
54#include <QtCore/QRect>
55
56QT_BEGIN_NAMESPACE
57
58namespace qdesigner_internal {
59/*!
60 \overload
61*/
62LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QLayout *layout)
63{
64 Q_UNUSED(core)
65 if (!layout)
66 return NoLayout;
67 else if (qobject_cast<const QHBoxLayout*>(layout))
68 return HBox;
69 else if (qobject_cast<const QVBoxLayout*>(layout))
70 return VBox;
71 else if (qobject_cast<const QGridLayout*>(layout))
72 return Grid;
73 else if (qobject_cast<const QFormLayout*>(layout))
74 return Form;
75 return UnknownLayout;
76}
77
78static const QHash<QString, LayoutInfo::Type> &layoutNameTypeMap()
79{
80 static QHash<QString, LayoutInfo::Type> nameTypeMap;
81 if (nameTypeMap.empty()) {
82 nameTypeMap.insert(QLatin1String("QVBoxLayout"), LayoutInfo::VBox);
83 nameTypeMap.insert(QLatin1String("QHBoxLayout"), LayoutInfo::HBox);
84 nameTypeMap.insert(QLatin1String("QGridLayout"), LayoutInfo::Grid);
85 nameTypeMap.insert(QLatin1String("QFormLayout"), LayoutInfo::Form);
86 }
87 return nameTypeMap;
88}
89
90LayoutInfo::Type LayoutInfo::layoutType(const QString &typeName)
91{
92 return layoutNameTypeMap().value(typeName, NoLayout);
93}
94
95QString LayoutInfo::layoutName(Type t)
96{
97 return layoutNameTypeMap().key(t);
98}
99
100/*!
101 \overload
102*/
103LayoutInfo::Type LayoutInfo::layoutType(const QDesignerFormEditorInterface *core, const QWidget *w)
104{
105 if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w))
106 return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
107 return layoutType(core, w->layout());
108}
109
110LayoutInfo::Type LayoutInfo::managedLayoutType(const QDesignerFormEditorInterface *core,
111 const QWidget *w,
112 QLayout **ptrToLayout)
113{
114 if (ptrToLayout)
115 *ptrToLayout = 0;
116 if (const QSplitter *splitter = qobject_cast<const QSplitter *>(w))
117 return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
118 QLayout *layout = managedLayout(core, w);
119 if (!layout)
120 return NoLayout;
121 if (ptrToLayout)
122 *ptrToLayout = layout;
123 return layoutType(core, layout);
124}
125
126QWidget *LayoutInfo::layoutParent(const QDesignerFormEditorInterface *core, QLayout *layout)
127{
128 Q_UNUSED(core)
129
130 QObject *o = layout;
131 while (o) {
132 if (QWidget *widget = qobject_cast<QWidget*>(o))
133 return widget;
134
135 o = o->parent();
136 }
137 return 0;
138}
139
140void LayoutInfo::deleteLayout(const QDesignerFormEditorInterface *core, QWidget *widget)
141{
142 if (QDesignerContainerExtension *container = qt_extension<QDesignerContainerExtension*>(core->extensionManager(), widget))
143 widget = container->widget(container->currentIndex());
144
145 Q_ASSERT(widget != 0);
146
147 QLayout *layout = managedLayout(core, widget);
148
149 if (layout == 0 || core->metaDataBase()->item(layout) != 0) {
150 delete layout;
151 widget->updateGeometry();
152 return;
153 }
154
155 qDebug() << "trying to delete an unmanaged layout:" << "widget:" << widget << "layout:" << layout;
156}
157
158LayoutInfo::Type LayoutInfo::laidoutWidgetType(const QDesignerFormEditorInterface *core,
159 QWidget *widget,
160 bool *isManaged,
161 QLayout **ptrToLayout)
162{
163 if (isManaged)
164 *isManaged = false;
165 if (ptrToLayout)
166 *ptrToLayout = 0;
167
168 QWidget *parent = widget->parentWidget();
169 if (!parent)
170 return NoLayout;
171
172 // 1) Splitter
173 if (QSplitter *splitter = qobject_cast<QSplitter*>(parent)) {
174 if (isManaged)
175 *isManaged = core->metaDataBase()->item(splitter);
176 return splitter->orientation() == Qt::Horizontal ? HSplitter : VSplitter;
177 }
178
179 // 2) Layout of parent
180 QLayout *parentLayout = parent->layout();
181 if (!parentLayout)
182 return NoLayout;
183
184 if (parentLayout->indexOf(widget) != -1) {
185 if (isManaged)
186 *isManaged = core->metaDataBase()->item(parentLayout);
187 if (ptrToLayout)
188 *ptrToLayout = parentLayout;
189 return layoutType(core, parentLayout);
190 }
191
192 // 3) Some child layout (see below comment about Q3GroupBox)
193 const QList<QLayout*> childLayouts = qFindChildren<QLayout*>(parentLayout);
194 if (childLayouts.empty())
195 return NoLayout;
196 const QList<QLayout*>::const_iterator lcend = childLayouts.constEnd();
197 for (QList<QLayout*>::const_iterator it = childLayouts.constBegin(); it != lcend; ++it) {
198 QLayout *layout = *it;
199 if (layout->indexOf(widget) != -1) {
200 if (isManaged)
201 *isManaged = core->metaDataBase()->item(layout);
202 if (ptrToLayout)
203 *ptrToLayout = layout;
204 return layoutType(core, layout);
205 }
206 }
207
208 return NoLayout;
209}
210
211QLayout *LayoutInfo::internalLayout(const QWidget *widget)
212{
213 QLayout *widgetLayout = widget->layout();
214 if (widgetLayout && widget->inherits("Q3GroupBox")) {
215 if (widgetLayout->count()) {
216 widgetLayout = widgetLayout->itemAt(0)->layout();
217 } else {
218 widgetLayout = 0;
219 }
220 }
221 return widgetLayout;
222}
223
224
225QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, const QWidget *widget)
226{
227 if (widget == 0)
228 return 0;
229
230 QLayout *layout = widget->layout();
231 if (!layout)
232 return 0;
233
234 return managedLayout(core, layout);
235}
236
237QLayout *LayoutInfo::managedLayout(const QDesignerFormEditorInterface *core, QLayout *layout)
238{
239 QDesignerMetaDataBaseInterface *metaDataBase = core->metaDataBase();
240
241 if (!metaDataBase)
242 return layout;
243 /* This code exists mainly for the Q3GroupBox class, for which
244 * widget->layout() returns an internal VBoxLayout. */
245 const QDesignerMetaDataBaseItemInterface *item = metaDataBase->item(layout);
246 if (item == 0) {
247 layout = qFindChild<QLayout*>(layout);
248 item = metaDataBase->item(layout);
249 }
250 if (!item)
251 return 0;
252 return layout;
253}
254
255// Is it a a dummy grid placeholder created by Designer?
256bool LayoutInfo::isEmptyItem(QLayoutItem *item)
257{
258 if (item == 0) {
259 qDebug() << "** WARNING Zero-item passed on to isEmptyItem(). This indicates a layout inconsistency.";
260 return true;
261 }
262 return item->spacerItem() != 0;
263}
264
265QDESIGNER_SHARED_EXPORT void getFormLayoutItemPosition(const QFormLayout *formLayout, int index, int *rowPtr, int *columnPtr, int *rowspanPtr, int *colspanPtr)
266{
267 int row;
268 QFormLayout::ItemRole role;
269 formLayout->getItemPosition(index, &row, &role);
270 const int columnspan = role == QFormLayout::SpanningRole ? 2 : 1;
271 const int column = (columnspan > 1 || role == QFormLayout::LabelRole) ? 0 : 1;
272 if (rowPtr)
273 *rowPtr = row;
274 if (columnPtr)
275 *columnPtr = column;
276 if (rowspanPtr)
277 *rowspanPtr = 1;
278 if (colspanPtr)
279 *colspanPtr = columnspan;
280}
281
282static inline QFormLayout::ItemRole formLayoutRole(int column, int colspan)
283{
284 if (colspan > 1)
285 return QFormLayout::SpanningRole;
286 return column == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole;
287}
288
289QDESIGNER_SHARED_EXPORT void formLayoutAddWidget(QFormLayout *formLayout, QWidget *w, const QRect &r, bool insert)
290{
291 // Consistent API galore...
292 if (insert) {
293 const bool spanning = r.width() > 1;
294 if (spanning) {
295 formLayout->insertRow(r.y(), w);
296 } else {
297 QWidget *label = 0, *field = 0;
298 if (r.x() == 0) {
299 label = w;
300 } else {
301 field = w;
302 }
303 formLayout->insertRow(r.y(), label, field);
304 }
305 } else {
306 formLayout->setWidget(r.y(), formLayoutRole(r.x(), r.width()), w);
307 }
308}
309
310} // namespace qdesigner_internal
311
312QT_END_NAMESPACE
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