diff options
Diffstat (limited to 'doc/src/snippets/qtreeview-dnd')
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/dragdropmodel.cpp | 147 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/dragdropmodel.h | 73 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/main.cpp | 52 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/mainwindow.cpp | 91 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/mainwindow.h | 62 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/qtreeview-dnd.pro | 9 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/treeitem.cpp | 126 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/treeitem.h | 72 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/treemodel.cpp | 263 | ||||
| -rw-r--r-- | doc/src/snippets/qtreeview-dnd/treemodel.h | 80 |
10 files changed, 975 insertions, 0 deletions
diff --git a/doc/src/snippets/qtreeview-dnd/dragdropmodel.cpp b/doc/src/snippets/qtreeview-dnd/dragdropmodel.cpp new file mode 100644 index 0000000..a02f373 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/dragdropmodel.cpp @@ -0,0 +1,147 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of an example program for Qt. +** EDITIONS: NOLIMITS +** +****************************************************************************/ + +#include <QtGui> + +#include "dragdropmodel.h" + +DragDropModel::DragDropModel(const QStringList &strings, QObject *parent) + : TreeModel(strings, parent) +{ +} + +bool DragDropModel::dropMimeData(const QMimeData *data, + Qt::DropAction action, int row, int column, const QModelIndex &parent) +{ + if (action == Qt::IgnoreAction) + return true; + + if (!data->hasFormat("text/plain")) + return false; + + int beginRow; + + if (row != -1) + beginRow = row; + else if (parent.isValid()) + beginRow = 0; + else + beginRow = rowCount(QModelIndex()); + + QByteArray encodedData = data->data("text/plain"); + QDataStream stream(&encodedData, QIODevice::ReadOnly); + QHash<qint64, QMap<int,QHash<int,QString> > > newItems; + + while (!stream.atEnd()) { + qint64 id; + int row; + int column; + QString text; + stream >> id >> row >> column >> text; + newItems[id][row][column] = text; + } + int rows = newItems.count(); + + insertRows(beginRow, rows, parent); + QMap<int,QHash<int,QString> > childItems; + foreach (childItems, newItems.values()) { + QHash<int,QString> rowItems; + foreach (rowItems, childItems.values()) { + foreach (int column, rowItems.keys()) { + QModelIndex idx = index(beginRow, column, parent); + setData(idx, rowItems[column]); + } + ++beginRow; + } + } + + return true; +} + +Qt::ItemFlags DragDropModel::flags(const QModelIndex &index) const +{ + Qt::ItemFlags defaultFlags = TreeModel::flags(index); + + if (index.isValid()) + return Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled | defaultFlags; + else + return Qt::ItemIsDropEnabled | defaultFlags; +} + +QMimeData *DragDropModel::mimeData(const QModelIndexList &indexes) const +{ + QMimeData *mimeData = new QMimeData(); + QByteArray encodedData; + + QDataStream stream(&encodedData, QIODevice::WriteOnly); + + foreach (QModelIndex index, indexes) { + if (index.isValid()) { + QString text = data(index, Qt::DisplayRole).toString(); + stream << index.internalId() << index.row() << index.column() << text; + } + } + + mimeData->setData("text/plain", encodedData); + return mimeData; +} + +QStringList DragDropModel::mimeTypes() const +{ + QStringList types; + types << "text/plain"; + return types; +} + +Qt::DropActions DragDropModel::supportedDropActions() const +{ + return Qt::CopyAction | Qt::MoveAction; +} diff --git a/doc/src/snippets/qtreeview-dnd/dragdropmodel.h b/doc/src/snippets/qtreeview-dnd/dragdropmodel.h new file mode 100644 index 0000000..b8cef91 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/dragdropmodel.h @@ -0,0 +1,73 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of an example program for Qt. +** EDITIONS: NOLIMITS +** +****************************************************************************/ + +#ifndef DRAGDROPMODEL_H +#define DRAGDROPMODEL_H + +#include "treemodel.h" + +class DragDropModel : public TreeModel +{ + Q_OBJECT + +public: + DragDropModel(const QStringList &strings, QObject *parent = 0); + + Qt::ItemFlags flags(const QModelIndex &index) const; + + bool dropMimeData(const QMimeData *data, Qt::DropAction action, + int row, int column, const QModelIndex &parent); + QMimeData *mimeData(const QModelIndexList &indexes) const; + QStringList mimeTypes() const; + Qt::DropActions supportedDropActions() const; +}; + +#endif diff --git a/doc/src/snippets/qtreeview-dnd/main.cpp b/doc/src/snippets/qtreeview-dnd/main.cpp new file mode 100644 index 0000000..19c7c20 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/main.cpp @@ -0,0 +1,52 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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/src/snippets/qtreeview-dnd/mainwindow.cpp b/doc/src/snippets/qtreeview-dnd/mainwindow.cpp new file mode 100644 index 0000000..f98333f --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/mainwindow.cpp @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include "mainwindow.h" +#include "dragdropmodel.h" + +MainWindow::MainWindow() +{ + QMenu *fileMenu = new QMenu(tr("&File")); + + QAction *quitAction = fileMenu->addAction(tr("E&xit")); + quitAction->setShortcut(tr("Ctrl+Q")); + + menuBar()->addMenu(fileMenu); + +// For convenient quoting: + QTreeView *treeView = new QTreeView(this); + treeView->setSelectionMode(QAbstractItemView::ExtendedSelection); + treeView->setDragEnabled(true); + treeView->setAcceptDrops(true); + treeView->setDropIndicatorShown(true); + + this->treeView = treeView; + + connect(quitAction, SIGNAL(triggered()), this, SLOT(close())); + + setupItems(); + + setCentralWidget(treeView); + setWindowTitle(tr("Tree View")); +} + +void MainWindow::setupItems() +{ + QStringList items; + items << tr("Widgets\tUser interface objects used to create GUI applications.") + << tr(" QWidget\tThe basic building block for all other widgets.") + << tr(" QDialog\tThe base class for dialog windows.") + << tr("Tools\tUtilities and applications for Qt developers.") + << tr(" Qt Designer\tA GUI form designer for Qt applications.") + << tr(" Qt Assistant\tA documentation browser for Qt documentation."); + + DragDropModel *model = new DragDropModel(items, this); + QModelIndex index = model->index(0, 0, QModelIndex()); + model->insertRows(2, 3, index); + index = model->index(0, 0, QModelIndex()); + index = model->index(2, 0, index); + model->setData(index, QVariant("QFrame")); + model->removeRows(3, 2, index.parent()); + treeView->setModel(model); +} diff --git a/doc/src/snippets/qtreeview-dnd/mainwindow.h b/doc/src/snippets/qtreeview-dnd/mainwindow.h new file mode 100644 index 0000000..ca0d947 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/mainwindow.h @@ -0,0 +1,62 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef WINDOW_H +#define WINDOW_H + +#include <QMainWindow> + +class QTreeView; + +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(); + +private: + void setupItems(); + + QTreeView *treeView; +}; + +#endif diff --git a/doc/src/snippets/qtreeview-dnd/qtreeview-dnd.pro b/doc/src/snippets/qtreeview-dnd/qtreeview-dnd.pro new file mode 100644 index 0000000..5dfabfc --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/qtreeview-dnd.pro @@ -0,0 +1,9 @@ +SOURCES = dragdropmodel.cpp \ + main.cpp \ + mainwindow.cpp \ + treeitem.cpp \ + treemodel.cpp +HEADERS = dragdropmodel.h \ + mainwindow.h \ + treeitem.h \ + treemodel.h diff --git a/doc/src/snippets/qtreeview-dnd/treeitem.cpp b/doc/src/snippets/qtreeview-dnd/treeitem.cpp new file mode 100644 index 0000000..99ce09a --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/treeitem.cpp @@ -0,0 +1,126 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* + treeitem.cpp + + A container for items of data supplied by the simple tree model. +*/ + +#include <QStringList> + +#include "treeitem.h" + +TreeItem::TreeItem(const QList<QVariant> &data, TreeItem *parent) +{ + parentItem = parent; + itemData = data; +} + +TreeItem::~TreeItem() +{ + qDeleteAll(childItems); +} + +void TreeItem::appendChild(TreeItem *item) +{ + childItems.append(item); +} + +TreeItem *TreeItem::child(int row) +{ + return childItems.value(row); +} + +int TreeItem::childCount() const +{ + return childItems.count(); +} + +int TreeItem::columnCount() const +{ + return itemData.count(); +} + +QVariant TreeItem::data(int column) const +{ + return itemData.value(column); +} + +bool TreeItem::insertChild(int row, TreeItem *item) +{ + if (row < 0 || row > childItems.count()) + return false; + + childItems.insert(row, item); + return true; +} + +TreeItem *TreeItem::parent() +{ + return parentItem; +} + +bool TreeItem::removeChild(int row) +{ + if (row < 0 || row >= childItems.count()) + return false; + + delete childItems.takeAt(row); + return true; +} + +int TreeItem::row() const +{ + if (parentItem) + return parentItem->childItems.indexOf(const_cast<TreeItem*>(this)); + + return 0; +} + +bool TreeItem::setData(int column, const QVariant &data) +{ + if (column < 0 || column >= itemData.count()) + return false; + + itemData.replace(column, data); + return true; +} diff --git a/doc/src/snippets/qtreeview-dnd/treeitem.h b/doc/src/snippets/qtreeview-dnd/treeitem.h new file mode 100644 index 0000000..84116ba --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/treeitem.h @@ -0,0 +1,72 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef TREEITEM_H +#define TREEITEM_H + +#include <QList> +#include <QVariant> + +class TreeItem +{ +public: + TreeItem(const QList<QVariant> &data, TreeItem *parent = 0); + ~TreeItem(); + + void appendChild(TreeItem *child); + + TreeItem *child(int row); + int childCount() const; + int columnCount() const; + QVariant data(int column) const; + bool insertChild(int row, TreeItem *item); + TreeItem *parent(); + bool removeChild(int row); + int row() const; + bool setData(int column, const QVariant &data); + +private: + QList<TreeItem*> childItems; + QList<QVariant> itemData; + TreeItem *parentItem; +}; + +#endif diff --git a/doc/src/snippets/qtreeview-dnd/treemodel.cpp b/doc/src/snippets/qtreeview-dnd/treemodel.cpp new file mode 100644 index 0000000..0fd0682 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/treemodel.cpp @@ -0,0 +1,263 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/* + treemodel.cpp + + Provides a simple tree model to show how to create and use hierarchical + models. +*/ + +#include <QtGui> + +#include "treeitem.h" +#include "treemodel.h" + +TreeModel::TreeModel(const QStringList &strings, QObject *parent) + : QAbstractItemModel(parent) +{ + QList<QVariant> rootData; + rootData << "Title" << "Summary"; + rootItem = new TreeItem(rootData); + setupModelData(strings, rootItem); +} + +TreeModel::~TreeModel() +{ + delete rootItem; +} + +int TreeModel::columnCount(const QModelIndex &parent) const +{ + if (parent.isValid()) + return static_cast<TreeItem*>(parent.internalPointer())->columnCount(); + else + return rootItem->columnCount(); +} + +QVariant TreeModel::data(const QModelIndex &index, int role) const +{ + if (!index.isValid()) + return QVariant(); + + if (role != Qt::DisplayRole) + return QVariant(); + + TreeItem *item = static_cast<TreeItem*>(index.internalPointer()); + + return item->data(index.column()); +} + +Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const +{ + if (!index.isValid()) + return Qt::ItemIsEnabled; + + return Qt::ItemIsEnabled | Qt::ItemIsSelectable; +} + +QVariant TreeModel::headerData(int section, Qt::Orientation orientation, + int role) const +{ + if (orientation == Qt::Horizontal && role == Qt::DisplayRole) + return rootItem->data(section); + + return QVariant(); +} + +QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) + const +{ + TreeItem *parentItem; + + if (!parent.isValid()) + parentItem = rootItem; + else + parentItem = static_cast<TreeItem*>(parent.internalPointer()); + + TreeItem *childItem = parentItem->child(row); + if (childItem) + return createIndex(row, column, childItem); + else + return QModelIndex(); +} + +bool TreeModel::insertRows(int position, int rows, const QModelIndex &parent) +{ + TreeItem *parentItem; + + if (!parent.isValid()) + parentItem = rootItem; + else + parentItem = static_cast<TreeItem*>(parent.internalPointer()); + + if (position < 0 || position > parentItem->childCount()) + return false; + + QList<QVariant> blankList; + for (int column = 0; column < columnCount(); ++column) + blankList << QVariant(""); + + beginInsertRows(parent, position, position + rows - 1); + + for (int row = 0; row < rows; ++row) { + TreeItem *newItem = new TreeItem(blankList, parentItem); + if (!parentItem->insertChild(position, newItem)) + break; + } + + endInsertRows(); + return true; +} + +QModelIndex TreeModel::parent(const QModelIndex &index) const +{ + if (!index.isValid()) + return QModelIndex(); + + TreeItem *childItem = static_cast<TreeItem*>(index.internalPointer()); + TreeItem *parentItem = childItem->parent(); + + if (parentItem == rootItem) + return QModelIndex(); + + return createIndex(parentItem->row(), 0, parentItem); +} + +bool TreeModel::removeRows(int position, int rows, const QModelIndex &parent) +{ + TreeItem *parentItem; + + if (!parent.isValid()) + parentItem = rootItem; + else + parentItem = static_cast<TreeItem*>(parent.internalPointer()); + + if (position < 0 || position > parentItem->childCount()) + return false; + + beginRemoveRows(parent, position, position + rows - 1); + + for (int row = 0; row < rows; ++row) { + if (!parentItem->removeChild(position)) + break; + } + + endRemoveRows(); + return true; +} + +int TreeModel::rowCount(const QModelIndex &parent) const +{ + TreeItem *parentItem; + + if (!parent.isValid()) + parentItem = rootItem; + else + parentItem = static_cast<TreeItem*>(parent.internalPointer()); + + return parentItem->childCount(); +} + +bool TreeModel::setData(const QModelIndex &index, + const QVariant &value, int role) +{ + if (!index.isValid() || role != Qt::EditRole) + return false; + + TreeItem *item = static_cast<TreeItem*>(index.internalPointer()); + + if (item->setData(index.column(), value)) + emit dataChanged(index, index); + else + return false; + + return true; +} + +void TreeModel::setupModelData(const QStringList &lines, TreeItem *parent) +{ + QList<TreeItem*> parents; + QList<int> indentations; + parents << parent; + indentations << 0; + + int number = 0; + + while (number < lines.count()) { + int position = 0; + while (position < lines[number].length()) { + if (lines[number].mid(position, 1) != " ") + break; + position++; + } + + QString lineData = lines[number].mid(position).trimmed(); + + if (!lineData.isEmpty()) { + // Read the column data from the rest of the line. + QStringList columnStrings = lineData.split("\t", QString::SkipEmptyParts); + QList<QVariant> columnData; + for (int column = 0; column < columnStrings.count(); ++column) + columnData << columnStrings[column]; + + if (position > indentations.last()) { + // The last child of the current parent is now the new parent + // unless the current parent has no children. + + if (parents.last()->childCount() > 0) { + parents << parents.last()->child(parents.last()->childCount()-1); + indentations << position; + } + } else { + while (position < indentations.last() && parents.count() > 0) { + parents.pop_back(); + indentations.pop_back(); + } + } + + // Append a new item to the current parent's list of children. + parents.last()->appendChild(new TreeItem(columnData, parents.last())); + } + + number++; + } +} diff --git a/doc/src/snippets/qtreeview-dnd/treemodel.h b/doc/src/snippets/qtreeview-dnd/treemodel.h new file mode 100644 index 0000000..e0a45b3 --- /dev/null +++ b/doc/src/snippets/qtreeview-dnd/treemodel.h @@ -0,0 +1,80 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef TREEMODEL_H +#define TREEMODEL_H + +#include <QAbstractItemModel> +#include <QModelIndex> +#include <QVariant> + +class TreeItem; + +class TreeModel : public QAbstractItemModel +{ + Q_OBJECT + +public: + TreeModel(const QStringList &strings, QObject *parent = 0); + ~TreeModel(); + + QVariant data(const QModelIndex &index, int role) const; + Qt::ItemFlags flags(const QModelIndex &index) const; + QVariant headerData(int section, Qt::Orientation orientation, + int role = Qt::DisplayRole) const; + QModelIndex index(int row, int column, + const QModelIndex &parent = QModelIndex()) const; + QModelIndex parent(const QModelIndex &index) const; + int rowCount(const QModelIndex &parent = QModelIndex()) const; + int columnCount(const QModelIndex &parent = QModelIndex()) const; + + bool insertRows(int position, int rows, const QModelIndex &parent = QModelIndex()); + bool removeRows(int position, int rows, const QModelIndex &parent = QModelIndex()); + bool setData(const QModelIndex &index, const QVariant &value, + int role = Qt::EditRole); + +private: + void setupModelData(const QStringList &lines, TreeItem *parent); + + TreeItem *rootItem; +}; + +#endif |