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Diffstat (limited to 'examples/widgets/layouts/dynamiclayouts/dialog.cpp')
| -rw-r--r-- | examples/widgets/layouts/dynamiclayouts/dialog.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/examples/widgets/layouts/dynamiclayouts/dialog.cpp b/examples/widgets/layouts/dynamiclayouts/dialog.cpp new file mode 100644 index 0000000000..e3ebb66944 --- /dev/null +++ b/examples/widgets/layouts/dynamiclayouts/dialog.cpp @@ -0,0 +1,169 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> + +#include "dialog.h" + +Dialog::Dialog(QWidget *parent) + : QDialog(parent) +{ + createRotableGroupBox(); + createOptionsGroupBox(); + createButtonBox(); + + mainLayout = new QGridLayout; + mainLayout->addWidget(rotableGroupBox, 0, 0); + mainLayout->addWidget(optionsGroupBox, 1, 0); + mainLayout->addWidget(buttonBox, 2, 0); + setLayout(mainLayout); + + mainLayout->setSizeConstraint(QLayout::SetMinimumSize); + + setWindowTitle(tr("Dynamic Layouts")); +} + +void Dialog::buttonsOrientationChanged(int index) +{ + mainLayout->setSizeConstraint(QLayout::SetNoConstraint); + setMinimumSize(0, 0); + + Qt::Orientation orientation = Qt::Orientation( + buttonsOrientationComboBox->itemData(index).toInt()); + + if (orientation == buttonBox->orientation()) + return; + + mainLayout->removeWidget(buttonBox); + + int spacing = mainLayout->spacing(); + + QSize oldSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing); + buttonBox->setOrientation(orientation); + QSize newSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing); + + if (orientation == Qt::Horizontal) { + mainLayout->addWidget(buttonBox, 2, 0); + resize(size() + QSize(-oldSizeHint.width(), newSizeHint.height())); + } else { + mainLayout->addWidget(buttonBox, 0, 3, 2, 1); + resize(size() + QSize(newSizeHint.width(), -oldSizeHint.height())); + } + + mainLayout->setSizeConstraint(QLayout::SetDefaultConstraint); +} + +void Dialog::rotateWidgets() +{ + Q_ASSERT(rotableWidgets.count() % 2 == 0); + + foreach (QWidget *widget, rotableWidgets) + rotableLayout->removeWidget(widget); + + rotableWidgets.enqueue(rotableWidgets.dequeue()); + + const int n = rotableWidgets.count(); + for (int i = 0; i < n / 2; ++i) { + rotableLayout->addWidget(rotableWidgets[n - i - 1], 0, i); + rotableLayout->addWidget(rotableWidgets[i], 1, i); + } +} + +void Dialog::help() +{ + QMessageBox::information(this, tr("Dynamic Layouts Help"), + tr("This example shows how to change layouts " + "dynamically.")); +} + +void Dialog::createRotableGroupBox() +{ + rotableGroupBox = new QGroupBox(tr("Rotable Widgets")); + + rotableWidgets.enqueue(new QSpinBox); + rotableWidgets.enqueue(new QSlider); + rotableWidgets.enqueue(new QDial); + rotableWidgets.enqueue(new QProgressBar); + + int n = rotableWidgets.count(); + for (int i = 0; i < n; ++i) { + connect(rotableWidgets[i], SIGNAL(valueChanged(int)), + rotableWidgets[(i + 1) % n], SLOT(setValue(int))); + } + + rotableLayout = new QGridLayout; + rotableGroupBox->setLayout(rotableLayout); + + rotateWidgets(); +} + +void Dialog::createOptionsGroupBox() +{ + optionsGroupBox = new QGroupBox(tr("Options")); + + buttonsOrientationLabel = new QLabel(tr("Orientation of buttons:")); + + buttonsOrientationComboBox = new QComboBox; + buttonsOrientationComboBox->addItem(tr("Horizontal"), Qt::Horizontal); + buttonsOrientationComboBox->addItem(tr("Vertical"), Qt::Vertical); + + connect(buttonsOrientationComboBox, SIGNAL(currentIndexChanged(int)), + this, SLOT(buttonsOrientationChanged(int))); + + optionsLayout = new QGridLayout; + optionsLayout->addWidget(buttonsOrientationLabel, 0, 0); + optionsLayout->addWidget(buttonsOrientationComboBox, 0, 1); + optionsLayout->setColumnStretch(2, 1); + optionsGroupBox->setLayout(optionsLayout); +} + +void Dialog::createButtonBox() +{ + buttonBox = new QDialogButtonBox; + + closeButton = buttonBox->addButton(QDialogButtonBox::Close); + helpButton = buttonBox->addButton(QDialogButtonBox::Help); + rotateWidgetsButton = buttonBox->addButton(tr("Rotate &Widgets"), + QDialogButtonBox::ActionRole); + + connect(rotateWidgetsButton, SIGNAL(clicked()), this, SLOT(rotateWidgets())); + connect(closeButton, SIGNAL(clicked()), this, SLOT(close())); + connect(helpButton, SIGNAL(clicked()), this, SLOT(help())); +} |