Mega Code Archive
ObjectTreeModel and QTreeView
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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
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