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50
51#include <QtWidgets>
52
53#include "dialog.h"
54
55Dialog::Dialog(QWidget *parent)
56 : QDialog(parent)
57{
58 createRotatableGroupBox();
59 createOptionsGroupBox();
60 createButtonBox();
61
62 mainLayout = new QGridLayout;
63 mainLayout->addWidget(rotatableGroupBox, 0, 0);
64 mainLayout->addWidget(optionsGroupBox, 1, 0);
65 mainLayout->addWidget(buttonBox, 2, 0);
66 setLayout(mainLayout);
67
68 mainLayout->setSizeConstraint(QLayout::SetMinimumSize);
69
70 setWindowTitle(tr("Dynamic Layouts"));
71}
72
73void Dialog::buttonsOrientationChanged(int index)
74{
75 mainLayout->setSizeConstraint(QLayout::SetNoConstraint);
76 setMinimumSize(0, 0);
77
78 Qt::Orientation orientation = Qt::Orientation(
79 buttonsOrientationComboBox->itemData(index).toInt());
80
81 if (orientation == buttonBox->orientation())
82 return;
83
84 mainLayout->removeWidget(buttonBox);
85
86 int spacing = mainLayout->spacing();
87
88 QSize oldSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
89 buttonBox->setOrientation(orientation);
90 QSize newSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
91
92 if (orientation == Qt::Horizontal) {
93 mainLayout->addWidget(buttonBox, 2, 0);
94 resize(size() + QSize(-oldSizeHint.width(), newSizeHint.height()));
95 } else {
96 mainLayout->addWidget(buttonBox, 0, 3, 2, 1);
97 resize(size() + QSize(newSizeHint.width(), -oldSizeHint.height()));
98 }
99
100 mainLayout->setSizeConstraint(QLayout::SetDefaultConstraint);
101}
102
103void Dialog::rotateWidgets()
104{
105 Q_ASSERT(rotatableWidgets.count() % 2 == 0);
106
107 for (QWidget *widget : qAsConst(rotatableWidgets))
108 rotatableLayout->removeWidget(widget);
109
110 rotatableWidgets.enqueue(rotatableWidgets.dequeue());
111
112 const int n = rotatableWidgets.count();
113 for (int i = 0; i < n / 2; ++i) {
114 rotatableLayout->addWidget(rotatableWidgets[n - i - 1], 0, i);
115 rotatableLayout->addWidget(rotatableWidgets[i], 1, i);
116 }
117}
118
119void Dialog::help()
120{
121 QMessageBox::information(this, tr("Dynamic Layouts Help"),
122 tr("This example shows how to change layouts "
123 "dynamically."));
124}
125
126void Dialog::createRotatableGroupBox()
127{
128 rotatableGroupBox = new QGroupBox(tr("Rotatable Widgets"));
129
130 rotatableWidgets.enqueue(new QSpinBox);
131 rotatableWidgets.enqueue(new QSlider);
132 rotatableWidgets.enqueue(new QDial);
133 rotatableWidgets.enqueue(new QProgressBar);
134
135 int n = rotatableWidgets.count();
136 for (int i = 0; i < n; ++i) {
137 connect(rotatableWidgets[i], SIGNAL(valueChanged(int)),
138 rotatableWidgets[(i + 1) % n], SLOT(setValue(int)));
139 }
140
141 rotatableLayout = new QGridLayout;
142 rotatableGroupBox->setLayout(rotatableLayout);
143
144 rotateWidgets();
145}
146
147void Dialog::createOptionsGroupBox()
148{
149 optionsGroupBox = new QGroupBox(tr("Options"));
150
151 buttonsOrientationLabel = new QLabel(tr("Orientation of buttons:"));
152
153 buttonsOrientationComboBox = new QComboBox;
154 buttonsOrientationComboBox->addItem(tr("Horizontal"), Qt::Horizontal);
155 buttonsOrientationComboBox->addItem(tr("Vertical"), Qt::Vertical);
156
157 connect(buttonsOrientationComboBox,
158 &QComboBox::currentIndexChanged,
159 this,
160 &Dialog::buttonsOrientationChanged);
161
162 optionsLayout = new QGridLayout;
163 optionsLayout->addWidget(buttonsOrientationLabel, 0, 0);
164 optionsLayout->addWidget(buttonsOrientationComboBox, 0, 1);
165 optionsLayout->setColumnStretch(2, 1);
166 optionsGroupBox->setLayout(optionsLayout);
167}
168
169void Dialog::createButtonBox()
170{
171 buttonBox = new QDialogButtonBox;
172
173 closeButton = buttonBox->addButton(QDialogButtonBox::Close);
174 helpButton = buttonBox->addButton(QDialogButtonBox::Help);
175 rotateWidgetsButton = buttonBox->addButton(tr("Rotate &Widgets"),
176 QDialogButtonBox::ActionRole);
177
178 connect(rotateWidgetsButton, &QPushButton::clicked, this, &Dialog::rotateWidgets);
179 connect(closeButton, &QPushButton::clicked, this, &Dialog::close);
180 connect(helpButton, &QPushButton::clicked, this, &Dialog::help);
181}
182
183
184