QTransform | CSS Transforms for jQuery

I'm trying to apply a zoom example that I've found on this site but it uses a QGraphicsScene and a QGraphicsView while I should use a simple QLabel. This is the code but it does not work. Can I zoom on a Qlabel or is it impossible? The zoom should work with ctrl++ / ctrl+- shortcut.

I am doing an Image Viewer that allow user to browse their folder and show the first image in the folder. By scrolling the mouse wheel, user is able to zoom in and out the image. However, the image pan up and down too as the scroll feature of the mouse wheel is still there. I try scrollbaralwaysoff but it doestn work too. May I know how to disable the scroll feature while remaining my zooming feature?

I'm new to Qt, and specially to PyQt5. I'm trying to develop a GUI using QGraphicsView, QGraphicsScene and QGraphicsPixmapItem. My objective is to add items to the scene when the user clicks on the scene (achieved using mousePressedEvent() in a QGraphicsScene subclass) and, using mouseMoveEvent(), I was able to move the element.

Then, I discovered that, with my implementation, the items could be moved like "pushing" them from outside the bounding rect. So, in order to fix it, after some searching, I decided to implement a subclass of QGraphicsPixmapItem to implement its own event functions.

Nevertheless, I found out that my item does not recognize mousePressed nor mouseMove events, but the ones from QGraphicsScene. My questions are:

1. What is the most efficient way to move elements without having the first problem I encountered?
2. Is it possible to combine both scene and item event handlers? I have not understood event propagation completely.

To make it more clear, I leave my code down below for the moving problem:

I'm having a lot of issues to have a simple working app that load a light mesh in Qt3D, nothing shows up on screen.

Here's some code I put together to have a have striped down to show.

You'll notice that it's a shorter version of this Qt example

• You won't see it in this example but in my actual project I already tried loading it with
  • qrc and
  • localfile QUrl
• Qt3DExtras::QTorusMesh work without an issue.
• I tried to watch the loading status of the mesh, on my actual project it does go from None though Loading to Loaded
• Also, I have no trouble loading the file su.obj using a Qt QML example, so it's not the file that is corrupted. The file being a simple Suzanne from Blender, exported.
• I used Qt5 and 6.
• Finally, I know the question has been asked a few times, but nothing helped.

I am making a custom scene that will print the item at mouse position in qgraphicsscene. But, I get an error when I run the code using the cmd.

Here is the full Traceback

Combining two QTransform map operators gives me a result that is not what I expected. Could anyone possibly point out the problem? Thanks.

I am trying to move my QGraphicsScene rectangle using a animation to get the impression that it moves smoothly. But I don't know how to do it works. Could some one help me? I would like to konow if its possible to animate a Qtransform instance. if it is, how can I do that?

Issues:

1 - How animate the translate function, which moves my scene rectangle. I want to animate it, because I want that it looks smooth.

2 - It's possible to animate a Qtransform instance?

here is my code:

I'm trying to make a sort of image viewer in which I put a background image ("Affichage du mur" button) and then I load images with the "Importer l'oeuvre" button (you can load as many images you want). It works fine but I would like that we could delete the images ... in fact I would like the image that we delete is the image selected by the user. I can't get the selected image to be deleted with the "Suppression de l'oeuvre" button ... it seems that there is a selectedItems() method but I don't know how to use it in my code. Can you help me please ? Here is a very simplified code of what I am doing :

I am trying to make a simple speedometer using PyQt5 and Qt Designer. I have a problem due to the rotation of the speedometer arrow self.arrow.
This is the code: