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Diffstat (limited to 'doc/codesnippets/doc/src/snippets/qlistview-using')
6 files changed, 526 insertions, 0 deletions
diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/main.cpp b/doc/codesnippets/doc/src/snippets/qlistview-using/main.cpp new file mode 100644 index 000000000..af1e7d5ac --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/main.cpp @@ -0,0 +1,52 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "mainwindow.h" + +int main(int argc, char *argv[]) +{ + QApplication app(argc, argv); + MainWindow *window = new MainWindow; + window->show(); + return app.exec(); +} diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.cpp b/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.cpp new file mode 100644 index 000000000..108547b34 --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.cpp @@ -0,0 +1,138 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "mainwindow.h" +#include "model.h" + +MainWindow::MainWindow() +{ + QMenu *fileMenu = new QMenu(tr("&File")); + + QAction *quitAction = fileMenu->addAction(tr("E&xit")); + quitAction->setShortcut(tr("Ctrl+Q")); + + QMenu *itemsMenu = new QMenu(tr("&Items")); + + insertAction = itemsMenu->addAction(tr("&Insert Item")); + removeAction = itemsMenu->addAction(tr("&Remove Item")); + QAction *ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order")); + QAction *descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order")); + + menuBar()->addMenu(fileMenu); + menuBar()->addMenu(itemsMenu); + + QStringList strings; + strings << tr("Oak") << tr("Fir") << tr("Pine") << tr("Birch") + << tr("Hazel") << tr("Redwood") << tr("Sycamore") << tr("Chestnut"); + model = new StringListModel(strings, this); +/* For convenient quoting: + QListView *listView = new QListView(this); +*/ + listView = new QListView(this); + listView->setModel(model); + listView->setSelectionMode(QAbstractItemView::SingleSelection); + + connect(quitAction, SIGNAL(triggered()), this, SLOT(close())); + connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending())); + connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending())); + connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem())); + connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem())); + connect(listView->selectionModel(), + SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)), + this, SLOT(updateMenus(const QModelIndex &))); + + updateMenus(listView->selectionModel()->currentIndex()); + + setCentralWidget(listView); + setWindowTitle(tr("List View")); +} + +void MainWindow::sortAscending() +{ + model->sort(0, Qt::AscendingOrder); +} + +void MainWindow::sortDescending() +{ + model->sort(0, Qt::DescendingOrder); +} + +void MainWindow::insertItem() +{ + QModelIndex currentIndex = listView->currentIndex(); + if (!currentIndex.isValid()) + return; + + QString itemText = QInputDialog::getText(this, tr("Insert Item"), + tr("Input text for the new item:")); + + if (itemText.isNull()) + return; + + if (model->insertRow(currentIndex.row(), QModelIndex())) { + QModelIndex newIndex = model->index(currentIndex.row(), 0, QModelIndex()); + model->setData(newIndex, itemText, Qt::EditRole); + + QString toolTipText = tr("Tooltip:") + itemText; + QString statusTipText = tr("Status tip:") + itemText; + QString whatsThisText = tr("What's This?:") + itemText; + model->setData(newIndex, toolTipText, Qt::ToolTipRole); + model->setData(newIndex, toolTipText, Qt::StatusTipRole); + model->setData(newIndex, whatsThisText, Qt::WhatsThisRole); + } +} + +void MainWindow::removeItem() +{ + QModelIndex currentIndex = listView->currentIndex(); + if (!currentIndex.isValid()) + return; + + model->removeRow(currentIndex.row(), QModelIndex()); +} + +void MainWindow::updateMenus(const QModelIndex ¤t) +{ + insertAction->setEnabled(current.isValid()); + removeAction->setEnabled(current.isValid()); +} diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.h b/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.h new file mode 100644 index 000000000..9333a0e18 --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/mainwindow.h @@ -0,0 +1,73 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef WINDOW_H +#define WINDOW_H + +#include <QMainWindow> +#include <QModelIndex> + +class QAction; +class QListView; +class StringListModel; + +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(); + +public slots: + void insertItem(); + void removeItem(); + void sortAscending(); + void sortDescending(); + void updateMenus(const QModelIndex ¤t); + +private: + QAction *insertAction; + QAction *removeAction; + QListView *listView; + StringListModel *model; +}; + +#endif diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/model.cpp b/doc/codesnippets/doc/src/snippets/qlistview-using/model.cpp new file mode 100644 index 000000000..7344b5142 --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/model.cpp @@ -0,0 +1,175 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of an example program for Qt. +** EDITIONS: NOLIMITS +** +****************************************************************************/ + +/* + model.cpp + + A simple model that uses a QStringList as its data source. +*/ + +#include "model.h" + +/*! + Returns the number of items in the string list as the number of rows + in the model. +*/ + +int StringListModel::rowCount(const QModelIndex &parent) const +{ + return stringList.count(); +} + +/*! + Returns an appropriate value for the requested data. + If the view requests an invalid index, an invalid variant is returned. + Any valid index that corresponds to a string in the list causes that + string to be returned. +*/ + +QVariant StringListModel::data(const QModelIndex &index, int role) const +{ + if (!index.isValid()) + return QVariant(); + + if (index.row() >= stringList.size()) + return QVariant(); + + if (role == Qt::DisplayRole) + return stringList.at(index.row()); + else + return QVariant(); +} + +/*! + Returns the appropriate header string depending on the orientation of + the header and the section. If anything other than the display role is + requested, we return an invalid variant. +*/ + +QVariant StringListModel::headerData(int section, Qt::Orientation orientation, + int role) const +{ + if (role != Qt::DisplayRole) + return QVariant(); + + if (orientation == Qt::Horizontal) + return QString("Column %1").arg(section); + else + return QString("Row %1").arg(section); +} + +/*! + Returns an appropriate value for the item's flags. Valid items are + enabled, selectable, and editable. +*/ + +Qt::ItemFlags StringListModel::flags(const QModelIndex &index) const +{ + if (!index.isValid()) + return Qt::ItemIsEnabled; + + return QAbstractItemModel::flags(index) | Qt::ItemIsEditable; +} + +/*! + Changes an item in the string list, but only if the following conditions + are met: + + * The index supplied is valid. + * The index corresponds to an item to be shown in a view. + * The role associated with editing text is specified. + + The dataChanged() signal is emitted if the item is changed. +*/ + +bool StringListModel::setData(const QModelIndex &index, + const QVariant &value, int role) +{ + if (index.isValid() && role == Qt::EditRole) { + + stringList.replace(index.row(), value.toString()); + emit dataChanged(index, index); + return true; + } + return false; +} + +/*! + Inserts a number of rows into the model at the specified position. +*/ + +bool StringListModel::insertRows(int position, int rows, const QModelIndex &parent) +{ + beginInsertRows(QModelIndex(), position, position+rows-1); + + for (int row = 0; row < rows; ++row) { + stringList.insert(position, ""); + } + + endInsertRows(); + return true; +} + +/*! + Removes a number of rows from the model at the specified position. +*/ + +bool StringListModel::removeRows(int position, int rows, const QModelIndex &parent) +{ + beginRemoveRows(QModelIndex(), position, position+rows-1); + + for (int row = 0; row < rows; ++row) { + stringList.removeAt(position); + } + + endRemoveRows(); + return true; +} diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/model.h b/doc/codesnippets/doc/src/snippets/qlistview-using/model.h new file mode 100644 index 000000000..9f5818c6c --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/model.h @@ -0,0 +1,83 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 1.0, 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 are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of an example program for Qt. +** EDITIONS: NOLIMITS +** +****************************************************************************/ + +#ifndef MODEL_H +#define MODEL_H + +#include <QAbstractListModel> +#include <QObject> +#include <QStringList> + +class StringListModel : public QAbstractListModel +{ + Q_OBJECT + +public: + StringListModel(const QStringList &strings, QObject *parent = 0) + : QAbstractListModel(parent), stringList(strings) {} + + int rowCount(const QModelIndex &parent = QModelIndex()) const; + QVariant data(const QModelIndex &index, int role) const; + QVariant headerData(int section, Qt::Orientation orientation, + int role = Qt::DisplayRole) const; + + Qt::ItemFlags flags(const QModelIndex &index) const; + bool setData(const QModelIndex &index, const QVariant &value, + int role = Qt::EditRole); + + bool insertRows(int position, int rows, const QModelIndex &index = QModelIndex()); + bool removeRows(int position, int rows, const QModelIndex &index = QModelIndex()); + +private: + QStringList stringList; +}; + +#endif diff --git a/doc/codesnippets/doc/src/snippets/qlistview-using/qlistview-using.pro b/doc/codesnippets/doc/src/snippets/qlistview-using/qlistview-using.pro new file mode 100644 index 000000000..71fa273a6 --- /dev/null +++ b/doc/codesnippets/doc/src/snippets/qlistview-using/qlistview-using.pro @@ -0,0 +1,5 @@ +SOURCES = main.cpp \ + mainwindow.cpp \ + model.cpp +HEADERS = mainwindow.h \ + model.h |