Mouse Event on Qlabel?

vasu_gupta

I have a button , a Qlabel and 4 double variables say x,y,width and height.

Now what i want is that once i click button and then go to the qlabel i can get the coordinated of the roi selected by mouse pressed and released event ?

For getting coordinate on Qlable I watched this Video:
https://www.youtube.com/watch?v=d0CDMtfefB4

But for some reason my Qlabel_mouseevent class(my_label in video) seems to be different when i create it.

#ifndef QLABEL_MOUSEEVENT_H
#define QLABEL_MOUSEEVENT_H

#include <QWidget>
class Qlabel_mouseevent : public QLabel
{
public:
    Qlabel_mouseevent();
};

#endif // QLABEL_MOUSEEVENT_H

mrjj

@vasu_gupta
Hi what you have is just new class.
You did not override mousepress

they look like
protected:
void mousePressEvent(QMouseEvent * event);
void mouseReleaseEvent(QMouseEvent * event);

please see this :)
https://wiki.qt.io/Clickable_QLabel

vasu_gupta

This post is deleted!

vasu_gupta

@mrjj I still don't get how to make mouse event on qlabel active only when a putton is pressed and once it gets the value of roi it again act as normal qlabel

mrjj

Hi
If you do not do
void ClickableLabel::mousePressEvent(QMouseEvent* event) {
emit clicked();
}

then it will be a normal label

so if only allowed to be clicked after some button pressed ( not toggle ?)

you need to tell it to stop emit.

You can try to set use setDisabled
void QWidget::setDisabled(bool disable)

when you set them back to "normal"

so they wont be clickable.