C++/Qt/Layout — различия между версиями
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Версия 14:21, 25 мая 2010
Содержание
Basic layout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
QT_BEGIN_NAMESPACE
class QAction;
class QDialogButtonBox;
class QGroupBox;
class QLabel;
class QLineEdit;
class QMenu;
class QMenuBar;
class QPushButton;
class QTextEdit;
QT_END_NAMESPACE
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog();
private:
void createMenu();
void createHorizontalGroupBox();
void createGridGroupBox();
void createFormGroupBox();
enum { NumGridRows = 3, NumButtons = 4 };
QMenuBar *menuBar;
QGroupBox *horizontalGroupBox;
QGroupBox *gridGroupBox;
QGroupBox *formGroupBox;
QTextEdit *smallEditor;
QTextEdit *bigEditor;
QLabel *labels[NumGridRows];
QLineEdit *lineEdits[NumGridRows];
QPushButton *buttons[NumButtons];
QDialogButtonBox *buttonBox;
QMenu *fileMenu;
QAction *exitAction;
};
#endif
#include <QtGui>
#include "dialog.h"
Dialog::Dialog()
{
createMenu();
createHorizontalGroupBox();
createGridGroupBox();
createFormGroupBox();
bigEditor = new QTextEdit;
bigEditor->setPlainText(tr("This widget takes up all the remaining space "
"in the top-level layout."));
buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
| QDialogButtonBox::Cancel);
connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->setMenuBar(menuBar);
mainLayout->addWidget(horizontalGroupBox);
mainLayout->addWidget(gridGroupBox);
mainLayout->addWidget(formGroupBox);
mainLayout->addWidget(bigEditor);
mainLayout->addWidget(buttonBox);
setLayout(mainLayout);
setWindowTitle(tr("Basic Layouts"));
}
void Dialog::createMenu()
{
menuBar = new QMenuBar;
fileMenu = new QMenu(tr("&File"), this);
exitAction = fileMenu->addAction(tr("E&xit"));
menuBar->addMenu(fileMenu);
connect(exitAction, SIGNAL(triggered()), this, SLOT(accept()));
}
void Dialog::createHorizontalGroupBox()
{
horizontalGroupBox = new QGroupBox(tr("Horizontal layout"));
QHBoxLayout *layout = new QHBoxLayout;
for (int i = 0; i < NumButtons; ++i) {
buttons[i] = new QPushButton(tr("Button %1").arg(i + 1));
layout->addWidget(buttons[i]);
}
horizontalGroupBox->setLayout(layout);
}
void Dialog::createGridGroupBox()
{
gridGroupBox = new QGroupBox(tr("Grid layout"));
QGridLayout *layout = new QGridLayout;
for (int i = 0; i < NumGridRows; ++i) {
labels[i] = new QLabel(tr("Line %1:").arg(i + 1));
lineEdits[i] = new QLineEdit;
layout->addWidget(labels[i], i + 1, 0);
layout->addWidget(lineEdits[i], i + 1, 1);
}
smallEditor = new QTextEdit;
smallEditor->setPlainText(tr("This widget takes up about two thirds of the "
"grid layout."));
layout->addWidget(smallEditor, 0, 2, 4, 1);
layout->setColumnStretch(1, 10);
layout->setColumnStretch(2, 20);
gridGroupBox->setLayout(layout);
}
void Dialog::createFormGroupBox()
{
formGroupBox = new QGroupBox(tr("Form layout"));
QFormLayout *layout = new QFormLayout;
layout->addRow(new QLabel(tr("Line 1:")), new QLineEdit);
layout->addRow(new QLabel(tr("Line 2, long text:")), new QComboBox);
layout->addRow(new QLabel(tr("Line 3:")), new QSpinBox);
formGroupBox->setLayout(layout);
}
#include <QApplication>
#include "dialog.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Dialog dialog;
return dialog.exec();
}
Dynamic layout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include <QQueue>
QT_BEGIN_NAMESPACE
class QComboBox;
class QDialogButtonBox;
class QGridLayout;
class QGroupBox;
class QLabel;
class QPushButton;
QT_END_NAMESPACE
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
private slots:
void buttonsOrientationChanged(int index);
void rotateWidgets();
void help();
private:
void createRotableGroupBox();
void createOptionsGroupBox();
void createButtonBox();
QGroupBox *rotableGroupBox;
QQueue<QWidget *> rotableWidgets;
QGroupBox *optionsGroupBox;
QLabel *buttonsOrientationLabel;
QComboBox *buttonsOrientationComboBox;
QDialogButtonBox *buttonBox;
QPushButton *closeButton;
QPushButton *helpButton;
QPushButton *rotateWidgetsButton;
QGridLayout *mainLayout;
QGridLayout *rotableLayout;
QGridLayout *optionsLayout;
};
#endif
#include <QtGui>
#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()));
}
#include <QApplication>
#include "dialog.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Dialog dialog;
return dialog.exec();
}
Grid Layout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
{
QWidget *window = new QWidget;
QPushButton *button1 = new QPushButton("One");
QPushButton *button2 = new QPushButton("Two");
QPushButton *button3 = new QPushButton("Three");
QPushButton *button4 = new QPushButton("Four");
QPushButton *button5 = new QPushButton("Five");
QGridLayout *layout = new QGridLayout;
layout->addWidget(button1, 0, 0);
layout->addWidget(button2, 0, 1);
layout->addWidget(button3, 1, 0, 1, 2);
layout->addWidget(button4, 2, 0);
layout->addWidget(button5, 2, 1);
window->setLayout(layout);
window->show();
}
return app.exec();
}
Horizontal BoxLayout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
{
QWidget *window = new QWidget;
QPushButton *button1 = new QPushButton("One");
QPushButton *button2 = new QPushButton("Two");
QPushButton *button3 = new QPushButton("Three");
QPushButton *button4 = new QPushButton("Four");
QPushButton *button5 = new QPushButton("Five");
QHBoxLayout *layout = new QHBoxLayout;
layout->addWidget(button1);
layout->addWidget(button2);
layout->addWidget(button3);
layout->addWidget(button4);
layout->addWidget(button5);
window->setLayout(layout);
window->show();
}
return app.exec();
}
Layout two labels
#include <QApplication>
#include <QVBoxLayout>
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget window;
QVBoxLayout* mainLayout = new QVBoxLayout(&window);
QLabel* label1 = new QLabel("One");
QLabel* label2 = new QLabel("Two");
mainLayout->addWidget(label1);
mainLayout->addWidget(label2);
window.show();
return a.exec();
}
Nested layout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWidget *window = new QWidget();
//! [create, lay out widgets and show]
QLabel *queryLabel = new QLabel(tr("Query:"));
QLineEdit *queryEdit = new QLineEdit();
QTableView *resultView = new QTableView();
QHBoxLayout *queryLayout = new QHBoxLayout();
queryLayout->addWidget(queryLabel);
queryLayout->addWidget(queryEdit);
QVBoxLayout *mainLayout = new QVBoxLayout();
mainLayout->addLayout(queryLayout);
mainLayout->addWidget(resultView);
window->setLayout(mainLayout);
//! [create, lay out widgets and show]
QStandardItemModel model;
model.setHorizontalHeaderLabels(QStringList() << tr("Name") << tr("Office"));
QList<QStringList> rows = QList<QStringList>()
<< (QStringList() << "Verne Nilsen" << "123")
<< (QStringList() << "Carlos Tang" << "77")
<< (QStringList() << "Bronwyn Hawcroft" << "119")
<< (QStringList() << "Alessandro Hanssen" << "32")
<< (QStringList() << "Andrew John Bakken" << "54")
<< (QStringList() << "Vanessa Weatherley" << "85")
<< (QStringList() << "Rebecca Dickens" << "17")
<< (QStringList() << "David Bradley" << "42")
<< (QStringList() << "Knut Walters" << "25")
<< (QStringList() << "Andrea Jones" << "34");
foreach (QStringList row, rows) {
QList<QStandardItem *> items;
foreach (QString text, row)
items.append(new QStandardItem(text));
model.appendRow(items);
}
resultView->setModel(&model);
resultView->verticalHeader()->hide();
resultView->horizontalHeader()->setStretchLastSection(true);
window->setWindowTitle(tr("Nested layouts"));
window->show();
return app.exec();
}
Pass window pointer to a Layout manager
Layout two labels
#include <QApplication>
#include <QVBoxLayout>
#include <QLabel>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget window;
QVBoxLayout* mainLayout = new QVBoxLayout(&window);
QLabel* label1 = new QLabel("One");
QLabel* label2 = new QLabel("Two");
mainLayout->addWidget(label1);
mainLayout->addWidget(label2);
window.show();
return a.exec();
}
Window layout
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWidget *window = new QWidget();
//! [create, lay out widgets and show]
QLabel *label = new QLabel(tr("Name:"));
QLineEdit *lineEdit = new QLineEdit();
QHBoxLayout *layout = new QHBoxLayout();
layout->addWidget(label);
layout->addWidget(lineEdit);
window->setLayout(layout);
//! [create, lay out widgets and show]
window->setWindowTitle(tr("Window layout"));
window->show();
return app.exec();
}