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2010-05-25T14:21:06Z

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==Cloning QListWidgetItem==

<source lang="cpp">
#include <QtGui>
int main(int argc, char* argv[])
{
QApplication app(argc, argv);
QListWidget listWidget;
QListWidgetItem *proto=new QListWidgetItem;
proto->setFont(QFont("Times"));
proto->setTextColor(Qt::blue);
proto->setBackgroundColor(Qt::yellow);
QListWidgetItem *name = proto->clone();
name->setText("Antje");
listWidget.insertItem(0,name);
name = proto->clone();
name->setText("Daniel");
listWidget.insertItem(0,name);
name = proto;
name->setText("Barbara");
listWidget.insertItem(0,name);
listWidget.sortItems();
listWidget.show();
return app.exec();
}

</source>

==Get QListWidgetItem from QListWidget==

<source lang="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 "listwidgetdialog.h"
#include <QListWidget>
#include <QPushButton>
#include <QGridLayout>
ListWidgetDialog::ListWidgetDialog() : QDialog(0)
{
QPushButton *left, *right;
QGridLayout *layout = new QGridLayout( this );
layout->addWidget( left = new QPushButton( "<<" ), 0, 1 );
layout->addWidget( right = new QPushButton( ">>" ), 1, 1 );
layout->addWidget( leftList = new QListWidget(), 0, 0, 3, 1 );
layout->addWidget( rightList = new QListWidget(), 0, 2, 3, 1 );

connect( left, SIGNAL(clicked()), this, SLOT(moveLeft()) );
connect( right, SIGNAL(clicked()), this, SLOT(moveRight()) );
QStringList items;
items << "Argentine" << "Brazilian" << "South African"
<< "USA West" << "Monaco" << "Belgian" << "Spanish"
<< "Swedish" << "French" << "British" << "German"
<< "Austrian" << "Dutch" << "Italian" << "USA East"
<< "Canadian";
leftList->addItems( items );
}

void ListWidgetDialog::moveLeft()
{
if( rightList->selectedItems().count() != 1 )
return;

QListWidgetItem *item = rightList->takeItem( rightList->currentRow() );
leftList->addItem( item );
}
void ListWidgetDialog::moveRight()
{
if( leftList->selectedItems().count() != 1 )
return;

QListWidgetItem *item = leftList->takeItem( leftList->currentRow() );
rightList->addItem( item );
}

Chapter03\listwidget\listwidgetdialog.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 LISTWIDGETDIALOG_H
#define LISTWIDGETDIALOG_H
#include <QDialog>
class QListWidget;
class ListWidgetDialog : public QDialog
{
Q_OBJECT

public:
ListWidgetDialog();

public slots:
void moveLeft();
void moveRight();

private:
QListWidget *leftList;
QListWidget *rightList;
};
#endif // LISTWIDGETDIALOG_H

Chapter03\listwidget\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 "listwidgetdialog.h"
int main( int argc, char **argv )
{
QApplication app( argc, argv );

ListWidgetDialog dlg;
dlg.show();

return app.exec();
}

</source>

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