Get QRect of a widget using mouseevent

[aamer4yu]

Wont QRubberBandbe of some use to you

[toutarrive]

You got the idea,

Call update() in void theGui::mouseMoveEvent(QMouseEvent *event), not in theGui::drawRect(QPoint _s, QPoint, _e) (rename it drawRectSelection(QPoint _s, QPoint, _e) to avoid confusion QPainter:rawRect(etc...)) .
No need to calll drawRect(startPoint,event->pos()) in void theGui::mouseMoveEvent(QMouseEvent *event);
Use your flag in theGui:aintEvent(QPaintEvent *event) and do the painting of the selection rectangle in this function only.


Or you can use QRubberBand as suggested...

[arpspatel]

void theGui::mousePressEvent(QMouseEvent* event) {
        if (!rubberband)
                 rubberband = new QRubberBand(QRubberBand::Rectangle, this);
        startPoint = event->pos();
        rubberband->setGeometry(QRect(startPoint,QSize()));
        rubberband->show();
        rubberBandActive = true;
}
 
 
void theGui::mouseMoveEvent(QMouseEvent* event) {
    if(rubberBandActive){
            rubberband->setGeometry(QRect(startPoint,event->pos()).normalized());
    }
}
 
void theGui::mouseReleaseEvent(QMouseEvent* event) {
    if(rubberBandActive){
        endPoint = event->pos();
        rubberBandActive = false;
        rubberband->hide();
    }
}

void theGui::mousePressEvent(QMouseEvent* event) {
        if (!rubberband)
                 rubberband = new QRubberBand(QRubberBand::Rectangle, this);
        startPoint = event->pos();
        rubberband->setGeometry(QRect(startPoint,QSize()));
        rubberband->show();
        rubberBandActive = true;
}


void theGui::mouseMoveEvent(QMouseEvent* event) {
    if(rubberBandActive){
            rubberband->setGeometry(QRect(startPoint,event->pos()).normalized());
    }
}

void theGui::mouseReleaseEvent(QMouseEvent* event) {
    if(rubberBandActive){
        endPoint = event->pos();
        rubberBandActive = false;
        rubberband->hide();
    }
}

To copy to clipboard, switch view to plain text mode 

Thanks Guys... I tried the QRubberBand and it worked very well and on first try.. there is also an example in qt doc. I didnt even know there was a class like QRubberBand, so I have posted the code here just in case some one needs it.....

[aamer4yu]

I tried the QRubberBand and it worked very well and on first try.. there is also an example in qt doc. I didnt even know there was a class like QRubberBand

Thats cuteness of Cute(Qt) ! You think, and its probable its there !