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DEADBEEF last edited by DEADBEEF
I’m working with QT in order to create a selection path. But now I would like to invert it, like the photoshop tool you know.
I used the subtracted method to manage to get the invert selection BUT I got only one path. I would like to splite this path into small path/polygons since I use a personal class to print the selections.
I know the methods ToFillPolygons & ToSubpathPolygons exist but they don’t give me what I need.
Here is few drawing to understand what I need:
First, the selections the user do in black: First Selection
Then, in red, the result of the subtracted method: Inverted selection
And here is what I’m looking for: How can I get only the 2 red polygons like this
In a perfect world I would like to get 5 polygons because I cannot deal with hole inside my polygons for the moment, I mean I cannot remove the line which connect outer and inner polygons and I have something like this: ugly result.
Now you can understand why I cannot use ToFillPolygons & ToSubpathPolygons method which give me this following result
Thanks for your help
DEADBEEF last edited by
Nobody has an idea?
It's very important and this issue drives me crazy
You could use operator - like this:
QPainterPath p1; p1.addRect(0.0, 0.0, 100.0, 150.0); QVector<QPointF> points; points << QPointF(60.0, 30.0) << QPointF(100.0, 30.0) << QPointF(100.0, 90.0) << QPointF(0.0, 90.0) << QPointF(0.0, 60.0) << QPointF(60.0, 60.0) << QPointF(60.0, 30.0); QPainterPath p2; p2.addPolygon(points); p2.addRect(20.0, 110.0, 60.0, 20.0); QPainterPath p3 = p1 - p2;
Jagir last edited by
Sorry to disturb you but if you are free then please give me answer of below question
I am newbie to this Qt framework.