C++/Qt/QListWidgetItem

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Cloning QListWidgetItem

<source lang="cpp">

  1. 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.
*
*/
  1. include "listwidgetdialog.h"
  2. include <QListWidget>
  3. include <QPushButton>
  4. 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.
*
*/
  1. ifndef LISTWIDGETDIALOG_H
  2. define LISTWIDGETDIALOG_H
  3. include <QDialog>

class QListWidget; class ListWidgetDialog : public QDialog {

 Q_OBJECT
 

public:

 ListWidgetDialog();
 

public slots:

 void moveLeft();
 void moveRight();
 

private:

 QListWidget *leftList;
 QListWidget *rightList;

};

  1. 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.
*
*/
  1. include <QApplication>
  2. include "listwidgetdialog.h"

int main( int argc, char **argv ) {

 QApplication app( argc, argv );
 
 ListWidgetDialog dlg;
 dlg.show();
 
 return app.exec();

}


 </source>