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Thread: View,Scene and RectItem

  1. #1
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    Default View,Scene and RectItem

    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 ,
    Qt Code:
    1. aWidget::aWidget(QWidget *parent)
    2. : QWidget(parent)
    3. {
    4.  
    5. ....
    6. matrixScene = new QGraphicsScene();
    7. matrixView = new QGraphicsView(matrixScene);
    8. DrawMatrix();
    9. ..
    10. }
    11. void aWidget::DrawMatrix()
    12. {
    13. squares.setRect(1000,1000,50,50);
    14. //squares = new QGraphicsRectItem();
    15. //squares = matrixScene.addRect(QRectF(10,50,100,100));
    16. matrixScene->addItem(&squares);
    17. matrixView->setScene(matrixScene);
    18. }
    19. #include <QtGui>
    20. #include <QWidget>
    21. #include "ui_ninesilicawidget.h"
    22.  
    23. class aWidget : public QWidget
    24. {
    25. Q_OBJECT
    26. ...
    27. QGraphicsView *matrixView;
    28. QGraphicsScene *matrixScene;
    29. Ui::NineSilicaWidgetClass ui;
    30. ..
    31. ...
    32. };
    33.  
    34. #endif // NINESILICAWIDGET_H
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  2. #2
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    Default Re: View,Scene and RectItem

    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 ???

  3. #3
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    Default Re: View,Scene and RectItem

    Is your sceneRect set properly ?
    More likely the problem is about this issue..

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