CODEWITHSUNDEEP
c++qtqpainter
Mike Shaw
Mike Shaw

Reputation: 393

Qt drawing outside the Painter device

I created a subclass of QToolBar to make a context tool bar associate with QGraphicsItem.

What I want to add is a small triangle point to where my toolbar popped up. I know that QPainter can't draw outside the QToolBar. But is there a way to draw from pic 1 to pic 2

From this

To this

Sorry. My pics are awful. But you could understand.

Upvotes: 0

Views: 599

Answers (1)

Ferenc Deak
Ferenc Deak

Reputation: 35408

Maybe you should create a new widget (or a tiny frameless, borderless window), with only the small triangle and put it at the required position (ie: the x coordinate should be the mouseX - width_of_window/2 and the Y coordinate should be mouseX - height_of_window).

Make sure the widget (windows) is hidden when the scrollbar is not shown, and show it at the calculated global coordinates on a mouse action.

Upvotes: 3

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