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2010-05-25T14:21:06Z

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==Int model for QListView==

<source lang="cpp">
Foundations of Qt Development\Chapter05\editmodel\intmodel.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 "intmodel.h"
IntModel::IntModel( int count, QObject *parent )
{
for( int i=0; i<count; ++i )
m_values << i+1;
}
Qt::ItemFlags IntModel::flags( const QModelIndex &index ) const
{
return Qt::ItemIsSelectable | Qt::ItemIsEditable | Qt::ItemIsEnabled;
}
QVariant IntModel::data( const QModelIndex &index, int role ) const
{
if( role != Qt::DisplayRole && role != Qt::EditRole )
return QVariant();

if( index.column() == 0 && index.row() < m_values.count() )
return m_values.at( index.row() );
else
return QVariant();
}
int IntModel::rowCount( const QModelIndex &parent ) const
{
return m_values.count();
}
bool IntModel::setData( const QModelIndex &index, const QVariant &value, int role )
{
if( role != Qt::EditRole || index.column() != 0 || index.row() >= m_values.count() )
return false;

if( value.toInt() == m_values.at( index.row() ) )
return false;
m_values[ index.row() ] = value.toInt();

emit dataChanged( index, index );
return true;
}

Foundations of Qt Development\Chapter05\editmodel\intmodel.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 INTMODEL_H
#define INTMODEL_H
#include <QAbstractListModel>
#include <QList>
class IntModel : public QAbstractListModel
{
public:
IntModel( int count, QObject *parent = 0 );

Qt::ItemFlags flags( const QModelIndex &index ) const;
QVariant data( const QModelIndex &index, int role = Qt::DisplayRole ) const;
int rowCount( const QModelIndex &parent = QModelIndex() ) const;
bool setData( const QModelIndex &index, const QVariant &value, int role = Qt::EditRole );
private:
QList<int> m_values;
};
#endif // INTMODEL_H

Foundations of Qt Development\Chapter05\editmodel\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 <QListView>
#include "intmodel.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );

IntModel model( 25 );

QListView list;
list.setModel( &model );
list.show();

return app.exec();
}

</source>

==QListView demo and QStandardItem==

<source lang="cpp">
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();
}

</source>

==QStringListModel and QStringList==

<source lang="cpp">

Foundations of Qt Development\Chapter05\stringlist\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 <QListView>
#include <QStringListModel>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QListView list;
QStringListModel model;
QStringList strings;

strings << "foo" << "bar" << "baz";

model.setStringList( strings );
list.setModel( &model );
list.show();

return app.exec();
}

</source>

==Set view mode for QListView==

<source lang="cpp">

#include <QtGui>
int main(int argc, char* argv[]){
QApplication app(argc, argv);
QDirModel dirModel;
QWidgetw;
w.setWindowTitle(QObject::tr("Four directory views using one model"));
QGridLayout *lay = new QGridLayout(&w);
QListView *lv =new QListView;
lay->addWidget(lv, 0, 0);
lv->setModel(&dirModel);
QListView *lvi = new QListView;
lay->addWidget(lvi, 0, 1);
lvi->setViewMode(QListView::IconMode);
lvi->setModel(&dirModel);
QTreeView *trv =new QTreeView;
lay->addWidget(trv, 1, 0);
trv->setModel(&dirModel);
QTableView *tav =new QTableView;
tav->setModel(&dirModel);
lay->addWidget(tav, 1, 1);
QModelIndex cwdIndex = dirModel.index(QDir::currentPath());
lv->setRootIndex(cwdIndex);
lvi->setRootIndex(cwdIndex);
trv->setRootIndex(cwdIndex);
tav->setRootIndex(cwdIndex);
w.show();
return app.exec();
}

</source>

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