mouseePress / mouseEvent , cursor coordinates & zoom issue

[Qtdigitex]

Hi ,

i'm a beginner in PyQt and i want to know please : what's the difference between mousePressEvent() and mouseReleaseEvent() ?

also i've another issue : i showed an image on a QgraphicsView like this : QImage ( path ) ==> convert to QPixmap ==> set On the QGraphicsView's Scene



is it possible to have the cursor coordinates Inside the image without clicking on any mouse or keybord button ? just navigating Inside the image and showing image pixel coordinates on the status bar ?


i'd like also to code a zoom function usine wheelEvent or comboBox :

i used the QImage instance and apply scale(current.width * zoom_factor, current.height() * zoom_factor) function , the problem i want the zoom to be centered around the current position of the cursor.

using , my method i have to use scroll bars each time i zoom to see the region i wanted to see ... and that's not cool

Thanks for reading ,

[anda_skoa]

i'm a beginner in PyQt and i want to know please : what's the difference between mousePressEvent() and mouseReleaseEvent() ?

As their names say, one is called when a mouse button is pressed, the other one when a mouse button is released.

is it possible to have the cursor coordinates Inside the image without clicking on any mouse or keybord button ? just navigating Inside the image and showing image pixel coordinates on the status bar ?

You probably need to enable mouse tracking on the view and then implement mouseMoveEvent()

i'd like also to code a zoom function usine wheelEvent or comboBox :

i used the QImage instance and apply scale(current.width * zoom_factor, current.height() * zoom_factor) function , the problem i want the zoom to be centered around the current position of the cursor.

using , my method i have to use scroll bars each time i zoom to see the region i wanted to see ... and that's not cool

Do you want to zoom or do you want to scale the elements?
For zooming you can just call scale() on the view and set the transformation anchor to view center.

Cheers,
_