User-draw table
Foundations of Qt Development\Chapter05\editdelegate\bardelegate.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 <QPainter>
#include <QSlider>
#include <QModelIndex>
#include "bardelegate.h"
BarDelegate::BarDelegate( QObject *parent ) : QAbstractItemDelegate( parent ) { }
void BarDelegate::paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
if( option.state & QStyle::State_Selected )
painter->fillRect( option.rect, option.palette.highlight() );
int value = index.model()->data( index, Qt::DisplayRole ).toInt();
double factor = double(value)/100.0;
painter->save();
if( factor > 1 )
{
painter->setBrush( Qt::red );
factor = 1;
}
else
painter->setBrush( QColor( 0, int(factor*255), 255-int(factor*255) ) );
painter->setPen( Qt::black );
painter->drawRect( option.rect.x()+2, option.rect.y()+2, int(factor*(option.rect.width()-5)), option.rect.height()-5 );
painter->restore();
}
QSize BarDelegate::sizeHint( const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
return QSize( 45, 15 );
}
QWidget *BarDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
QSlider *slider = new QSlider( parent );
slider->setAutoFillBackground( true );
slider->setOrientation( Qt::Horizontal );
slider->setRange( 0, 100 );
slider->installEventFilter( const_cast<BarDelegate*>(this) );
return slider;
}
void BarDelegate::updateEditorGeometry( QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
editor->setGeometry( option.rect );
}
void BarDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
{
int value = index.model()->data( index, Qt::DisplayRole ).toInt();
static_cast<QSlider*>( editor )->setValue( value );
}
void BarDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
{
model->setData( index, static_cast<QSlider*>( editor )->value() );
}
Foundations of Qt Development\Chapter05\editdelegate\bardelegate.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 BARDELEGATE_H
#define BARDELEGATE_H
#include <QAbstractItemDelegate>
class BarDelegate : public QAbstractItemDelegate
{
public:
BarDelegate( QObject *parent = 0 );
void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const;
QSize sizeHint( const QStyleOptionViewItem &option, const QModelIndex &index ) const;
QWidget *createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const;
void setEditorData( QWidget *editor, const QModelIndex &index ) const;
void setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const;
void updateEditorGeometry( QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index ) const;
};
#endif // BARDELEGATE_H
Foundations of Qt Development\Chapter05\editdelegate\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 <QTableView>
#include <QStandardItemModel>
#include "bardelegate.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QTableView table;
QStandardItemModel model( 10, 2 );
for( int r=0; r<10; ++r )
{
QStandardItem *item = new QStandardItem( QString("Row %1").arg(r+1) );
item->setEditable( false );
model.setItem( r, 0, item );
model.setItem( r, 1, new QStandardItem( QString::number((r*30)%100 )) );
}
table.setModel( &model );
BarDelegate delegate;
table.setItemDelegateForColumn( 1, &delegate );
table.show();
return app.exec();
}
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