How to change cordinate sistem in QGraphicsItem

[ugo_]

I want to plot my custom item inside a chart.
The cordinates of the components inside the object are in the chart's cordinate system, not the scene.
How do I make this conversion? The example of my problem can be found in this link: https://stackoverflow.com/questions/75573360/qt-change-of-cordinates-for-qgraphicsitem

[Pl45m4]

@ugo_

mapToScene(Point)
mapFromScene(Point)
mapToGlobal(Point)
mapFromGlobal(Point)

or the basic mapTo(someWidget, Point) / mapFrom(someWidget, Point)

• https://doc.qt.io/qt-5/qgraphicsview.html#mapToScene

Edit:
After looking at your code, dont map your boundingRect to scene. It's in item coordinates.

What do you get and what do you expect?

[ugo_]

@Pl45m4 I wanted to create my custom object to be displayed on the chart, and later possibly implementing a custom series for that object, messing with these conversion functions eventually made my code work, but I wanted an all rounded solution.

[Pl45m4]

Either I haven't figured out, what you are doing or it's complete nonsense (esp. the boundingRect)
Maybe you can add the rest of your code and a screenshot of how your result looks.

@ugo_ said in How to change cordinate sistem in QGraphicsItem:

I want to plot my custom item inside a chart.

Are you talking about QChart? So you have a QChart and want your item in your chart?!