How to use QGraphicsProxyWidget in Qt

Comments

17 Sep
2009

Article Review by nayan_trivedi (20090917)

This article illustrate the all information about the QGraphicsProxyWidget class Which copies the state from the widget into the proxy.This article useful for getting informations of different Things.

code snippet shown in article in which there are plenty of informations are shown in the box->addItem that all informations you can get by using scroll Bar shown in screen shot.QGroupBox class used for this operation.

This article is useful for intermediate.This article can also useful in different application.

Log in or Join to leave comments.

Article Metadata

---

Tested with

Devices(s): S60 Emulator

---

Compatibility

Platform(s): Qt

---

Platform Security

Signing Required: Self-Signed

Capabilities: None

---

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