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| |
| #include <QtWidgets> |
| |
| #include "dialog.h" |
| |
| Dialog::Dialog(QWidget *parent) |
| : QDialog(parent) |
| { |
| createRotatableGroupBox(); |
| createOptionsGroupBox(); |
| createButtonBox(); |
| |
| mainLayout = new QGridLayout; |
| mainLayout->addWidget(rotatableGroupBox, 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(rotatableWidgets.count() % 2 == 0); |
| |
| for (QWidget *widget : qAsConst(rotatableWidgets)) |
| rotatableLayout->removeWidget(widget); |
| |
| rotatableWidgets.enqueue(rotatableWidgets.dequeue()); |
| |
| const int n = rotatableWidgets.count(); |
| for (int i = 0; i < n / 2; ++i) { |
| rotatableLayout->addWidget(rotatableWidgets[n - i - 1], 0, i); |
| rotatableLayout->addWidget(rotatableWidgets[i], 1, i); |
| } |
| } |
| |
| void Dialog::help() |
| { |
| QMessageBox::information(this, tr("Dynamic Layouts Help"), |
| tr("This example shows how to change layouts " |
| "dynamically.")); |
| } |
| |
| void Dialog::createRotatableGroupBox() |
| { |
| rotatableGroupBox = new QGroupBox(tr("Rotatable Widgets")); |
| |
| rotatableWidgets.enqueue(new QSpinBox); |
| rotatableWidgets.enqueue(new QSlider); |
| rotatableWidgets.enqueue(new QDial); |
| rotatableWidgets.enqueue(new QProgressBar); |
| |
| int n = rotatableWidgets.count(); |
| for (int i = 0; i < n; ++i) { |
| connect(rotatableWidgets[i], SIGNAL(valueChanged(int)), |
| rotatableWidgets[(i + 1) % n], SLOT(setValue(int))); |
| } |
| |
| rotatableLayout = new QGridLayout; |
| rotatableGroupBox->setLayout(rotatableLayout); |
| |
| 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, |
| QOverload<int>::of(&QComboBox::currentIndexChanged), |
| this, |
| &Dialog::buttonsOrientationChanged); |
| |
| 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, &QPushButton::clicked, this, &Dialog::rotateWidgets); |
| connect(closeButton, &QPushButton::clicked, this, &Dialog::close); |
| connect(helpButton, &QPushButton::clicked, this, &Dialog::help); |
| } |
| |
| |