1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Designer of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL-EXCEPT$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 as published by the Free Software
20** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
21** included in the packaging of this file. Please review the following
22** information to ensure the GNU General Public License requirements will
23** be met: https://www.gnu.org/licenses/gpl-3.0.html.
24**
25** $QT_END_LICENSE$
26**
27****************************************************************************/
28
29#include "formwindow_widgetstack.h"
30#include <QtDesigner/abstractformwindowtool.h>
31
32#include <QtWidgets/qwidget.h>
33#include <QtGui/qevent.h>
34#include <QtWidgets/qaction.h>
35#include <QtWidgets/qstackedlayout.h>
36#include <QtWidgets/qboxlayout.h>
37
38#include <QtCore/qdebug.h>
39
40QT_BEGIN_NAMESPACE
41
42using namespace qdesigner_internal;
43
44FormWindowWidgetStack::FormWindowWidgetStack(QObject *parent) :
45 QObject(parent),
46 m_formContainer(new QWidget),
47 m_formContainerLayout(new QStackedLayout),
48 m_layout(new QStackedLayout)
49{
50 m_layout->setContentsMargins(QMargins());
51 m_layout->setSpacing(0);
52 m_layout->setStackingMode(QStackedLayout::StackAll);
53
54 // We choose a QStackedLayout as immediate layout for
55 // the form windows as it ignores the sizePolicy of
56 // its child (for example, Fixed would cause undesired side effects).
57 m_formContainerLayout->setContentsMargins(QMargins());
58 m_formContainer->setObjectName(QStringLiteral("formContainer"));
59 m_formContainer->setLayout(m_formContainerLayout);
60 m_formContainerLayout->setStackingMode(QStackedLayout::StackAll);
61 // System settings might have different background colors, autofill them
62 // (affects for example mainwindow status bars)
63 m_formContainer->setAutoFillBackground(true);
64}
65
66FormWindowWidgetStack::~FormWindowWidgetStack() = default;
67
68int FormWindowWidgetStack::count() const
69{
70 return m_tools.count();
71}
72
73QDesignerFormWindowToolInterface *FormWindowWidgetStack::currentTool() const
74{
75 return tool(index: currentIndex());
76}
77
78void FormWindowWidgetStack::setCurrentTool(int index)
79{
80 const int cnt = count();
81 if (index < 0 || index >= cnt) {
82 qDebug(msg: "FormWindowWidgetStack::setCurrentTool(): invalid index: %d", index);
83 return;
84 }
85
86 const int cur = currentIndex();
87 if (index == cur)
88 return;
89
90 if (cur != -1)
91 m_tools.at(i: cur)->deactivated();
92
93
94 m_layout->setCurrentIndex(index);
95 // Show the widget editor and the current tool
96 for (int i = 0; i < cnt; i++)
97 m_tools.at(i)->editor()->setVisible(i == 0 || i == index);
98
99 QDesignerFormWindowToolInterface *tool = m_tools.at(i: index);
100 tool->activated();
101
102 emit currentToolChanged(index);
103}
104
105void FormWindowWidgetStack::setSenderAsCurrentTool()
106{
107 QDesignerFormWindowToolInterface *tool = nullptr;
108 QAction *action = qobject_cast<QAction*>(object: sender());
109 if (action == nullptr) {
110 qDebug(msg: "FormWindowWidgetStack::setSenderAsCurrentTool(): sender is not a QAction");
111 return;
112 }
113
114 for (QDesignerFormWindowToolInterface *t : qAsConst(t&: m_tools)) {
115 if (action == t->action()) {
116 tool = t;
117 break;
118 }
119 }
120
121 if (tool == nullptr) {
122 qDebug(msg: "FormWindowWidgetStack::setSenderAsCurrentTool(): unknown tool");
123 return;
124 }
125
126 setCurrentTool(tool);
127}
128
129int FormWindowWidgetStack::indexOf(QDesignerFormWindowToolInterface *tool) const
130{
131 return m_tools.indexOf(t: tool);
132}
133
134void FormWindowWidgetStack::setCurrentTool(QDesignerFormWindowToolInterface *tool)
135{
136 int index = indexOf(tool);
137 if (index == -1) {
138 qDebug(msg: "FormWindowWidgetStack::setCurrentTool(): unknown tool");
139 return;
140 }
141
142 setCurrentTool(index);
143}
144
145void FormWindowWidgetStack::setMainContainer(QWidget *w)
146{
147 // This code is triggered once by the formwindow and
148 // by integrations doing "revert to saved". Anything changing?
149 const int previousCount = m_formContainerLayout->count();
150 QWidget *previousMainContainer = previousCount
151 ? m_formContainerLayout->itemAt(0)->widget() : nullptr;
152 if (previousMainContainer == w)
153 return;
154 // Swap
155 if (previousCount)
156 delete m_formContainerLayout->takeAt(0);
157 if (w)
158 m_formContainerLayout->addWidget(w);
159}
160
161void FormWindowWidgetStack::addTool(QDesignerFormWindowToolInterface *tool)
162{
163 if (QWidget *w = tool->editor()) {
164 w->setVisible(m_layout->count() == 0); // Initially only form editor is visible
165 m_layout->addWidget(w);
166 } else {
167 // The form editor might not have a tool initially, use dummy. Assert on anything else
168 Q_ASSERT(m_tools.isEmpty());
169 m_layout->addWidget(w: m_formContainer);
170 }
171
172 m_tools.append(t: tool);
173
174 connect(sender: tool->action(), signal: &QAction::triggered,
175 receiver: this, slot: &FormWindowWidgetStack::setSenderAsCurrentTool);
176}
177
178QDesignerFormWindowToolInterface *FormWindowWidgetStack::tool(int index) const
179{
180 if (index < 0 || index >= count())
181 return nullptr;
182
183 return m_tools.at(i: index);
184}
185
186int FormWindowWidgetStack::currentIndex() const
187{
188 return m_layout->currentIndex();
189}
190
191QWidget *FormWindowWidgetStack::defaultEditor() const
192{
193 if (m_tools.isEmpty())
194 return nullptr;
195
196 return m_tools.at(i: 0)->editor();
197}
198
199QLayout *FormWindowWidgetStack::layout() const
200{
201 return m_layout;
202}
203
204QT_END_NAMESPACE
205

source code of qttools/src/designer/src/components/formeditor/formwindow_widgetstack.cpp