[Gambas-user] Why is this code running twice?

[Fernando Cabral]

2017-08-02 7:05 GMT-03:00 Adrien Prokopowicz <adrien.prokopowicz at ...626...>:


Le Wed, 02 Aug 2017 03:38:33 +0200, Fernando Cabral <
> fernandojosecabral at ...626...> a écrit:
>
> Besides, I have a question: when a drawing area is created, it (0,0)
>> supposed to be the central point?
>>
>>
> No. Unlike math where the origin (0,0) is usually represented in the
> center,
> the origin of screen coordinates is always located in the top-left corner.
>
> If you want the actual center of your DrawingArea, you will have to use
> the following coordinates :
>
> x = DrawingArea.Width / 2
> y = DrawingArea.Height / 2
>

Problem is: this simple instruction "Paint.MoveTo(0, 0)" moves the cursor
to the center
of the drawing area.  I expected it to move it to the left superior corner.
I can't figure why.

Regards

- fernando


> Hope this helps. :-)
>
> Regards,
>
> [0] http://gambaswiki.org/wiki/comp/gb.qt4/drawingarea
> [1] http://gambaswiki.org/wiki/comp/gb.qt4/drawingarea/cached
> [2] http://gambaswiki.org/wiki/comp/gb.qt4/drawingarea/refresh
>
> --
> Adrien Prokopowicz
>



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