Overlaying Picture with heat map

tiegert

Hi, i would like to draw a raster in a window and lay a picture on top. It should be possible to resize the picture by dragging and afterr resizing then getting the size of the picture relativ to the raster. In addition i would like to overlay the picture afterwards with a heatmap.

Has anyone got an idea on where to go? Is QML/Qt-Quick the way to go?
Right now i do just need a place to start.

Just to get an idea of what i want:

qt-picture heatmap.png

Pl45m4

@tiegert said in Overlaying Picture with heat map:

Has anyone got an idea on where to go? Is QML/Qt-Quick the way to go?

You could use the GraphicsView Framework

https://doc.qt.io/qt-5/graphicsview.html

or you paint everything manually

https://doc.qt.io/qt-5/qtwidgets-widgets-scribble-example.html

tiegert

Ok, thanks i will have a look at the GraphicsView Framework at first, because painting everything manually sounds like a lot of work!

mrjj

@tiegert
Hi
Its not so much to avoid manual drawing but the GraphicsView Framework gives
z order / selection handling and zoom/scrolling and panning out of the box where
as QPainter is just the actual painting.