How to use QGraphicsProxyWidget in Qt

Article Metadata

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Tested with

Devices(s): S60 Emulator

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Compatibility

Platform(s): Qt

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Platform Security

Signing Required: Self-Signed

Capabilities: None

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Article

Keywords: QGraphicsProxyWidget,QGraphicsScene,QGraphicsView,QLineEdit,QLabel

Created: mind_freak (10 Apr 2009)

Last edited: hamishwillee (11 Oct 2012)

Introduction

The QGraphicsProxyWidget class provides a proxy layer for embedding a QWidget in a QGraphicsScene. QGraphicsProxyWidget embeds QWidget-based widgets, for example, a QPushButton, QFontComboBox, or even QFileDialog, into QGraphicsScene. It forwards events between the two objects and translates between QWidget's integer-based geometry and QGraphicsWidget's qreal-based geometry.

QGraphicsProxyWidget takes care of automatically embedding popup children of embedded widgets through creating a child proxy for each popup.

Souce Code

Main.cpp

#include "proxywidget.h"
 
#include <QtGui>
#include <QApplication>
#include<QGroupBox>
#include<QFormLayout>
#include<QLabel>
#include<QLineEdit>
#include<QGraphicsScene>
#include<QGraphicsProxyWidget>
#include<QGraphicsView>
#include<QPushButton>
#include<QComboBox>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
     QGroupBox *groupBox = new QGroupBox("Contact Details",this);
     QLabel *numberLabel = new QLabel("Telephone number",this);
     QLineEdit *numberEdit = new QLineEdit(this);
     QPushButton *but=new QPushButton("Helloooo",this);
     QFormLayout *layout = new QFormLayout;
     QComboBox *box=new QComboBox(this);
     box->addItem("Nokia");
     box->addItem("Qt");
     box->addItem("Widget");
     box->addItem("N96");
     box->addItem("London");
     box->addItem("Finland");
     box->addItem("NewYork");
     box->addItem("Symbian");
     box->addItem("Paris");
     box->addItem("Budapest");
     layout->addRow(numberLabel, numberEdit);
     layout->addRow(but);
     layout->addRow(box);
     groupBox->setLayout(layout);
 
     QGraphicsScene scene;
     QGraphicsProxyWidget *proxy = scene.addWidget(groupBox);
     QGraphicsView view(&scene);
     view.show();
    return a.exec();
}

ScreenShot

Before Clicking The ComboBox

Note the changes in the scrollBar of the widget

More about QGraphicProxyWidget