select a particular area

[vishesh]

how to select a particular area in qwidget using mouseevents

[jpn]

Here's a one approach:

press event:
- store the event position

move event:
- draw a rectangle from press point to move event position

release event:
- apply the selection
- invalidate press point

[vishesh]

How to draw a rectangle in application

[jpn]

Use QPainter. Here's an example from the docs:

void SimpleExampleWidget::paintEvent()
    {
        QPainter paint( this );
        paint.setPen( Qt::blue );
        paint.drawText( rect(), AlignCenter, "The Text" );
    }

void SimpleExampleWidget::paintEvent()
    {
        QPainter paint( this );
        paint.setPen( Qt::blue );
        paint.drawText( rect(), AlignCenter, "The Text" );
    }

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Replace QPainter::drawText() with QPainter::drawRect()..

[vishesh]

thank you its working properly