View,Scene and RectItem

[salmanmanekia]

i have a very basic problem ,i am trying to draw a rectangle in my widget at a certain position but it wont draw ,below is the code ,

aWidget::aWidget(QWidget *parent)
    : QWidget(parent)
{
 
	....
	matrixScene = new QGraphicsScene();
	matrixView = new QGraphicsView(matrixScene);
	DrawMatrix();
..
}
void aWidget::DrawMatrix()
{	
	squares.setRect(1000,1000,50,50);
	//squares = new QGraphicsRectItem();
	//squares = matrixScene.addRect(QRectF(10,50,100,100));
	matrixScene->addItem(&squares);
	matrixView->setScene(matrixScene);
}
#include <QtGui>
#include <QWidget>
#include "ui_ninesilicawidget.h"
 
class aWidget : public QWidget
{
    Q_OBJECT
...
QGraphicsView *matrixView;
QGraphicsScene *matrixScene;
QGraphicsRectItem squares;
 Ui::NineSilicaWidgetClass ui;
..
...
};
 
#endif // NINESILICAWIDGET_H

aWidget::aWidget(QWidget *parent)
    : QWidget(parent)
{

	....
	matrixScene = new QGraphicsScene();
	matrixView = new QGraphicsView(matrixScene);
	DrawMatrix();
..
}
void aWidget::DrawMatrix()
{	
	squares.setRect(1000,1000,50,50);
	//squares = new QGraphicsRectItem();
	//squares = matrixScene.addRect(QRectF(10,50,100,100));
	matrixScene->addItem(&squares);
	matrixView->setScene(matrixScene);
}
#include <QtGui>
#include <QWidget>
#include "ui_ninesilicawidget.h"

class aWidget : public QWidget
{
    Q_OBJECT
...
QGraphicsView *matrixView;
QGraphicsScene *matrixScene;
QGraphicsRectItem squares;
 Ui::NineSilicaWidgetClass ui;
..
...
};

#endif // NINESILICAWIDGET_H

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[aamer4yu]

Is your sceneRect set properly ? May be the item is too far away and its not being drawn ?
Also about the design, why dont you inherit from QGraphicsView itself ?

Ohh wait.. where did you show the view ???

[zgulser]

Is your sceneRect set properly ?

More likely the problem is about this issue..