C++/Qt/QTreeView
Содержание
ObjectTreeModel and QTreeView
Foundations of Qt Development\Chapter05\treemodel\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include <QApplication>
#include <QTreeView>
#include "objecttreemodel.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QObject root;
root.setObjectName( "root" );
QObject *child;
QObject *foo = new QObject( &root );
foo->setObjectName( "foo" );
child = new QObject( foo );
child->setObjectName( "Mark" );
child = new QObject( foo );
child->setObjectName( "Bob" );
child = new QObject( foo );
child->setObjectName( "Kent" );
QObject *bar = new QObject( &root );
bar->setObjectName( "bar" );
child = new QObject( bar );
child->setObjectName( "Ole" );
child = new QObject( bar );
child->setObjectName( "Trond" );
child = new QObject( bar );
child->setObjectName( "Kjetil" );
child = new QObject( bar );
child->setObjectName( "Lasse" );
QObject *baz = new QObject( &root );
baz->setObjectName( "baz" );
child = new QObject( baz );
child->setObjectName( "Bengt" );
child = new QObject( baz );
child->setObjectName( "Sven" );
ObjectTreeModel model( &root );
QTreeView tree;
tree.setModel( &model );
tree.show();
return app.exec();
}
Foundations of Qt Development\Chapter05\treemodel\objecttreemodel.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include <QMetaObject>
#include "objecttreemodel.h"
ObjectTreeModel::ObjectTreeModel( QObject *root, QObject *parent ) : QAbstractItemModel( parent )
{
m_root = root;
}
Qt::ItemFlags ObjectTreeModel::flags(const QModelIndex &index) const
{
return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}
QVariant ObjectTreeModel::data( const QModelIndex &index, int role) const
{
if( !index.isValid() )
return QVariant();
if( role == Qt::DisplayRole )
{
switch( index.column() )
{
case 0:
return static_cast<QObject*>( index.internalPointer() )->objectName();
case 1:
return static_cast<QObject*>( index.internalPointer() )->metaObject()->className();
default:
break;
}
}
else if( role == Qt::ToolTipRole )
{
switch( index.column() )
{
case 0:
return QString( "The name of the object." );
case 1:
return QString( "The name of the class." );
default:
break;
}
}
return QVariant();
}
QVariant ObjectTreeModel::headerData(int section, Qt::Orientation orientation, int role ) const
{
if( role != Qt::DisplayRole || orientation != Qt::Horizontal )
return QVariant();
switch( section )
{
case 0:
return QString( "Object" );
case 1:
return QString( "Class" );
default:
return QVariant();
}
}
int ObjectTreeModel::rowCount(const QModelIndex &parent ) const
{
QObject *parentObject;
if( !parent.isValid() )
parentObject = m_root;
else
parentObject = static_cast<QObject*>( parent.internalPointer() );
return parentObject->children().count();
}
int ObjectTreeModel::columnCount(const QModelIndex &parent ) const
{
return 2;
}
QModelIndex ObjectTreeModel::index(int row, int column, const QModelIndex &parent ) const
{
QObject *parentObject;
if( !parent.isValid() )
parentObject = m_root;
else
parentObject = static_cast<QObject*>( parent.internalPointer() );
if( row < parentObject->children().count() )
return createIndex( row, column, parentObject->children().at( row ) );
else
return QModelIndex();
}
QModelIndex ObjectTreeModel::parent(const QModelIndex &index) const
{
if( !index.isValid() )
return QModelIndex();
QObject *indexObject = static_cast<QObject*>( index.internalPointer() );
QObject *parentObject = indexObject->parent();
if( parentObject == m_root )
return QModelIndex();
QObject *grandParentObject = parentObject->parent();
return createIndex( grandParentObject->children().indexOf( parentObject ), 0, parentObject );
}
Foundations of Qt Development\Chapter05\treemodel\objecttreemodel.h
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#ifndef OBJECTTREEMODEL_H
#define OBJECTTREEMODEL_H
#include <QAbstractItemModel>
class ObjectTreeModel : public QAbstractItemModel
{
public:
ObjectTreeModel( QObject *root, QObject *parent = 0 );
Qt::ItemFlags flags( const QModelIndex &index ) const;
QVariant data( const QModelIndex &index, int role ) const;
QVariant headerData( int section, Qt::Orientation orientation, int role = Qt::DisplayRole ) const;
int rowCount( const QModelIndex &parent = QModelIndex() ) const;
int columnCount( const QModelIndex &parent = QModelIndex() ) const;
QModelIndex index( int row, int column, const QModelIndex &parent = QModelIndex() ) const;
QModelIndex parent( const QModelIndex &index ) const;
private:
QObject *m_root;
};
#endif // OBJECTTREEMODEL_H
QTableView demo and QStandardItem
Foundations of Qt Development\Chapter05\readonlyview\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include <QApplication>
#include <QSplitter>
#include <QTreeView>
#include <QListView>
#include <QTableView>
#include <QStandardItemModel>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QTreeView *tree = new QTreeView();
QListView *list = new QListView();
QTableView *table = new QTableView();
QSplitter splitter;
splitter.addWidget( tree );
splitter.addWidget( list );
splitter.addWidget( table );
QStandardItemModel model( 5, 2 );
for( int r=0; r<5; r++ )
for( int c=0; c<2; c++)
{
QStandardItem *item = new QStandardItem( QString("Row:%0, Column:%1").arg(r).arg(c) );
if( c == 0 )
for( int i=0; i<3; i++ )
{
QStandardItem *child = new QStandardItem( QString("Item %0").arg(i) );
child->setEditable( false );
item->appendRow( child );
}
model.setItem(r, c, item);
}
model.setHorizontalHeaderItem( 0, new QStandardItem( "Foo" ) );
model.setHorizontalHeaderItem( 1, new QStandardItem( "Bar-Baz" ) );
tree->setModel( &model );
list->setModel( &model );
table->setModel( &model );
list->setSelectionModel( tree->selectionModel() );
table->setSelectionModel( tree->selectionModel() );
table->setSelectionBehavior( QAbstractItemView::SelectRows );
table->setSelectionMode( QAbstractItemView::SingleSelection );
splitter.show();
return app.exec();
}
QTreeView demo and QStandardItem
Foundations of Qt Development\Chapter05\readonlyview\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* 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 APress 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.
*
*/
#include <QApplication>
#include <QSplitter>
#include <QTreeView>
#include <QListView>
#include <QTableView>
#include <QStandardItemModel>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QTreeView *tree = new QTreeView();
QListView *list = new QListView();
QTableView *table = new QTableView();
QSplitter splitter;
splitter.addWidget( tree );
splitter.addWidget( list );
splitter.addWidget( table );
QStandardItemModel model( 5, 2 );
for( int r=0; r<5; r++ )
for( int c=0; c<2; c++)
{
QStandardItem *item = new QStandardItem( QString("Row:%0, Column:%1").arg(r).arg(c) );
if( c == 0 )
for( int i=0; i<3; i++ )
{
QStandardItem *child = new QStandardItem( QString("Item %0").arg(i) );
child->setEditable( false );
item->appendRow( child );
}
model.setItem(r, c, item);
}
model.setHorizontalHeaderItem( 0, new QStandardItem( "Foo" ) );
model.setHorizontalHeaderItem( 1, new QStandardItem( "Bar-Baz" ) );
tree->setModel( &model );
list->setModel( &model );
table->setModel( &model );
list->setSelectionModel( tree->selectionModel() );
table->setSelectionModel( tree->selectionModel() );
table->setSelectionBehavior( QAbstractItemView::SelectRows );
table->setSelectionMode( QAbstractItemView::SingleSelection );
splitter.show();
return app.exec();
}
QTreeView drag and drop
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
/****************************************************************************
**
** 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 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
#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;
}
#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
/*
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;
}
#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
/*
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++;
}
}
#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QTreeView;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
private:
void setupItems();
QTreeView *treeView;
};
#endif
#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);
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->show();
return app.exec();
}
Some selections made using a table view
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QItemSelection>
#include <QMainWindow>
#include <QModelIndex>
#include <QWidget>
#include <QTableView>
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);
public slots:
void updateSelection(const QItemSelection &selected,
const QItemSelection &deselected);
void changeCurrent(const QModelIndex ¤t, const QModelIndex &previous);
private:
QAbstractItemModel *model;
QItemSelectionModel *selectionModel;
QTableView *table;
};
#endif
/*
window.cpp
A minimal subclass of QTableView with slots to allow the selection model
to be monitored.
*/
#include <QAbstractItemModel>
#include <QItemSelection>
#include <QItemSelectionModel>
#include <QStatusBar>
#include "model.h"
#include "window.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
setWindowTitle("Selected items in a table model");
model = new TableModel(8, 4, this);
table = new QTableView(this);
table->setModel(model);
selectionModel = table->selectionModel();
connect(selectionModel,
SIGNAL(selectionChanged(const QItemSelection &, const QItemSelection &)),
this, SLOT(updateSelection(const QItemSelection &, const QItemSelection &)));
connect(selectionModel,
SIGNAL(currentChanged(const QModelIndex &, const QModelIndex &)),
this, SLOT(changeCurrent(const QModelIndex &, const QModelIndex &)));
statusBar();
setCentralWidget(table);
}
void MainWindow::updateSelection(const QItemSelection &selected,
const QItemSelection &deselected)
{
QModelIndex index;
QModelIndexList items = selected.indexes();
foreach (index, items) {
QString text = QString("(%1,%2)").arg(index.row()).arg(index.column());
model->setData(index, text);
}
items = deselected.indexes();
foreach (index, items)
model->setData(index, "");
}
void MainWindow::changeCurrent(const QModelIndex ¤t,
const QModelIndex &previous)
{
statusBar()->showMessage(
tr("Moved from (%1,%2) to (%3,%4)")
.arg(previous.row()).arg(previous.column())
.arg(current.row()).arg(current.column()));
}
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MODEL_H
#define MODEL_H
#include <QAbstractTableModel>
#include <QStringList>
#include <QVariant>
class TableModel : public QAbstractTableModel
{
Q_OBJECT
public:
TableModel(int rows = 1, int columns = 1, QObject *parent = 0);
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(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 &parent = QModelIndex());
bool insertColumns(int position, int columns, const QModelIndex &parent = QModelIndex());
bool removeRows(int position, int rows, const QModelIndex &parent = QModelIndex());
bool removeColumns(int position, int columns, const QModelIndex &parent = QModelIndex());
private:
QList<QStringList> rowList;
};
#endif
/*
model.cpp
Provides a table model for use in various examples.
*/
#include <QtGui>
#include "model.h"
/*!
Constructs a table model with at least one row and one column.
*/
TableModel::TableModel(int rows, int columns, QObject *parent)
: QAbstractTableModel(parent)
{
QStringList newList;
for (int column = 0; column < qMax(1, columns); ++column) {
newList.append("");
}
for (int row = 0; row < qMax(1, rows); ++row) {
rowList.append(newList);
}
}
/*!
Returns the number of items in the row list as the number of rows
in the model.
*/
int TableModel::rowCount(const QModelIndex &/*parent*/) const
{
return rowList.size();
}
/*!
Returns the number of items in the first list item as the number of
columns in the model. All rows should have the same number of columns.
*/
int TableModel::columnCount(const QModelIndex &/*parent*/) const
{
return rowList[0].size();
}
/*!
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 for the display role; otherwise an invalid variant
is returned.
*/
QVariant TableModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (role == Qt::DisplayRole)
return rowList[index.row()][index.column()];
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 TableModel::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 TableModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::ItemIsEnabled;
return Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable;
}
/*!
Changes an item in the model, but only if the following conditions
are met:
* The index supplied is valid.
* The role associated with editing text is specified.
The dataChanged() signal is emitted if the item is changed.
*/
bool TableModel::setData(const QModelIndex &index,
const QVariant &value, int role)
{
if (!index.isValid() || role != Qt::EditRole)
return false;
rowList[index.row()][index.column()] = value.toString();
emit dataChanged(index, index);
return true;
}
/*!
Inserts a number of rows into the model at the specified position.
*/
bool TableModel::insertRows(int position, int rows, const QModelIndex &parent)
{
int columns = columnCount();
beginInsertRows(parent, position, position + rows - 1);
for (int row = 0; row < rows; ++row) {
QStringList items;
for (int column = 0; column < columns; ++column)
items.append("");
rowList.insert(position, items);
}
endInsertRows();
return true;
}
/*!
Inserts a number of columns into the model at the specified position.
Each entry in the list is extended in turn with the required number of
empty strings.
*/
bool TableModel::insertColumns(int position, int columns, const QModelIndex &parent)
{
int rows = rowCount();
beginInsertColumns(parent, position, position + columns - 1);
for (int row = 0; row < rows; ++row) {
for (int column = position; column < columns; ++column) {
rowList[row].insert(position, "");
}
}
endInsertColumns();
return true;
}
/*!
Removes a number of rows from the model at the specified position.
*/
bool TableModel::removeRows(int position, int rows, const QModelIndex &parent)
{
beginRemoveRows(parent, position, position + rows - 1);
for (int row = 0; row < rows; ++row) {
rowList.removeAt(position);
}
endRemoveRows();
return true;
}
/*!
Removes a number of columns from the model at the specified position.
Each row is shortened by the number of columns specified.
*/
bool TableModel::removeColumns(int position, int columns, const QModelIndex &parent)
{
int rows = rowCount();
beginRemoveColumns(parent, position, position + columns - 1);
for (int row = 0; row < rows; ++row) {
for (int column = 0; column < columns; ++column) {
rowList[row].removeAt(position);
}
}
endRemoveColumns();
return true;
}
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
/*
main.cpp
A simple example that shows how selections can be used directly on a model.
It shows the result of some selections made using a table view.
*/
#include <QApplication>
#include "window.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QMainWindow *window = new MainWindow;
window->show();
window->resize(640, 480);
return app.exec();
}
Using QTreeView
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef WINDOW_H
#define WINDOW_H
#include <QMainWindow>
class QAction;
class QTreeWidget;
class QTreeWidgetItem;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void findItems();
void insertItem();
void removeItem();
void sortAscending();
void sortDescending();
void updateMenus(QTreeWidgetItem *current);
void updateSortItems();
private:
void setupTreeItems();
QAction *ascendingAction;
QAction *autoSortAction;
QAction *descendingAction;
QAction *insertAction;
QAction *removeAction;
QTreeWidget *treeWidget;
};
#endif
#include <QtGui>
#include "mainwindow.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"));
removeAction->setEnabled(false);
itemsMenu->addSeparator();
ascendingAction = itemsMenu->addAction(tr("Sort in &Ascending Order"));
descendingAction = itemsMenu->addAction(tr("Sort in &Descending Order"));
autoSortAction = itemsMenu->addAction(tr("&Automatically Sort Items"));
autoSortAction->setCheckable(true);
itemsMenu->addSeparator();
QAction *findItemsAction = itemsMenu->addAction(tr("&Find Items"));
findItemsAction->setShortcut(tr("Ctrl+F"));
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(itemsMenu);
/* For convenient quoting:
QTreeWidget *treeWidget = new QTreeWidget(this);
*/
treeWidget = new QTreeWidget(this);
treeWidget->setColumnCount(2);
QStringList headers;
headers << tr("Subject") << tr("Default");
treeWidget->setHeaderLabels(headers);
connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
connect(ascendingAction, SIGNAL(triggered()), this, SLOT(sortAscending()));
connect(autoSortAction, SIGNAL(triggered()), this, SLOT(updateSortItems()));
connect(descendingAction, SIGNAL(triggered()), this, SLOT(sortDescending()));
connect(findItemsAction, SIGNAL(triggered()), this, SLOT(findItems()));
connect(insertAction, SIGNAL(triggered()), this, SLOT(insertItem()));
connect(removeAction, SIGNAL(triggered()), this, SLOT(removeItem()));
connect(treeWidget,
SIGNAL(currentItemChanged(QTreeWidgetItem *, QTreeWidgetItem *)),
this, SLOT(updateMenus(QTreeWidgetItem *)));
setupTreeItems();
updateMenus(treeWidget->currentItem());
setCentralWidget(treeWidget);
setWindowTitle(tr("Tree Widget"));
}
void MainWindow::setupTreeItems()
{
QTreeWidgetItem *cities = new QTreeWidgetItem(treeWidget);
cities->setText(0, tr("Cities"));
QTreeWidgetItem *osloItem = new QTreeWidgetItem(cities);
osloItem->setText(0, tr("Oslo"));
osloItem->setText(1, tr("Yes"));
(new QTreeWidgetItem(cities))->setText(0, tr("Stockholm"));
(new QTreeWidgetItem(cities))->setText(0, tr("Helsinki"));
(new QTreeWidgetItem(cities))->setText(0, tr("Copenhagen"));
QTreeWidgetItem *planets = new QTreeWidgetItem(treeWidget, cities);
planets->setText(0, tr("Planets"));
(new QTreeWidgetItem(planets))->setText(0, tr("Mercury"));
(new QTreeWidgetItem(planets))->setText(0, tr("Venus"));
QTreeWidgetItem *earthItem = new QTreeWidgetItem(planets);
earthItem->setText(0, tr("Earth"));
earthItem->setText(1, tr("Yes"));
(new QTreeWidgetItem(planets))->setText(0, tr("Mars"));
(new QTreeWidgetItem(planets))->setText(0, tr("Jupiter"));
(new QTreeWidgetItem(planets))->setText(0, tr("Saturn"));
(new QTreeWidgetItem(planets))->setText(0, tr("Uranus"));
(new QTreeWidgetItem(planets))->setText(0, tr("Neptune"));
(new QTreeWidgetItem(planets))->setText(0, tr("Pluto"));
}
void MainWindow::findItems()
{
QString itemText = QInputDialog::getText(this, tr("Find Items"),
tr("Text to find (including wildcards):"));
if (itemText.isEmpty())
return;
QTreeWidgetItem *item;
foreach (item, treeWidget->selectedItems())
treeWidget->setItemSelected(item, false);
QList<QTreeWidgetItem *> found = treeWidget->findItems(
itemText, Qt::MatchWildcard);
foreach (item, found) {
treeWidget->setItemSelected(item, true);
// Show the item->text(0) for each item.
}
}
void MainWindow::insertItem()
{
QTreeWidgetItem *currentItem = treeWidget->currentItem();
if (!currentItem)
return;
QString itemText = QInputDialog::getText(this, tr("Insert Item"),
tr("Input text for the new item:"));
if (itemText.isEmpty())
return;
QTreeWidgetItem *parent = currentItem->parent();
QTreeWidgetItem *newItem;
if (parent)
newItem = new QTreeWidgetItem(parent, treeWidget->currentItem());
else
newItem = new QTreeWidgetItem(treeWidget, treeWidget->currentItem());
newItem->setText(0, itemText);
}
void MainWindow::removeItem()
{
QTreeWidgetItem *currentItem = treeWidget->currentItem();
if (!currentItem)
return;
QTreeWidgetItem *parent = currentItem->parent();
int index;
if (parent) {
index = parent->indexOfChild(treeWidget->currentItem());
delete parent->takeChild(index);
} else {
index = treeWidget->indexOfTopLevelItem(treeWidget->currentItem());
delete treeWidget->takeTopLevelItem(index);
}
}
void MainWindow::sortAscending()
{
treeWidget->sortItems(0, Qt::AscendingOrder);
}
void MainWindow::sortDescending()
{
treeWidget->sortItems(0, Qt::DescendingOrder);
}
void MainWindow::updateMenus(QTreeWidgetItem *current)
{
insertAction->setEnabled(current != 0);
removeAction->setEnabled(current != 0);
}
void MainWindow::updateSortItems()
{
ascendingAction->setEnabled(!autoSortAction->isChecked());
descendingAction->setEnabled(!autoSortAction->isChecked());
treeWidget->setSortingEnabled(autoSortAction->isChecked());
}
#include <QtGui>
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->show();
return app.exec();
}
/****************************************************************************
**
** 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.
** $QT_END_LICENSE$
**
****************************************************************************/
/*
main.cpp
A simple example of how to view a model in several views, and share a
selection model.
*/
#include <QtGui>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QSplitter *splitter = new QSplitter;
QDirModel *model = new QDirModel;
QTreeView *tree = new QTreeView(splitter);
tree->setModel(model);
tree->setRootIndex(model->index(QDir::currentPath()));
QListView *list = new QListView(splitter);
list->setModel(model);
list->setRootIndex(model->index(QDir::currentPath()));
QItemSelectionModel *selection = new QItemSelectionModel(model);
tree->setSelectionModel(selection);
list->setSelectionModel(selection);
splitter->setWindowTitle("Two views onto the same directory model");
splitter->show();
return app.exec();
}