Coordinates in a Windows Form Component

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Hi everyone, I want to know if there is a way to put the point (0,0) to the center of the component, because the coordinates origin is on the top left of the component, is there any possible way of do that?, thanks...

Posted 25-Feb-15 4:40am

Cesar Bretana Gonzalez

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Sergey Alexandrovich Kryukov 25-Feb-15 11:44am

Which component? Of which UI library (WPF, Forms, something else?)?
—SA

3 solutions

Solution 1

The coordinate system assumes (0, 0) is the top left corner of the drawing surface. ~~You can't change that. You'll have to do the math to effect any custom transformation.~~

Correction: I was wrong. Please see Sergey's solution.

/ravi

Posted 25-Feb-15 4:46am

Ravi Bhavnani

Updated 25-Feb-15 6:12am

v2

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Cesar Bretana Gonzalez 25-Feb-15 11:01am

already done that, the equation to that is simple: r = (px + cw/2 ; py + ch/2), beeing cw: Component Weight and ch: Component Height, but now, when I'm add a point, is keeping using the 4th Quadrant, how can I solve this?

Ravi Bhavnani 25-Feb-15 11:09am

I suspect your math may not be correct.

/ravi

Sergey Alexandrovich Kryukov 25-Feb-15 11:50am

Sorry, what you said is just not true. Please see Solution 3. You advice still can be used, but it does not answer correctly.
—SA

Ravi Bhavnani 25-Feb-15 12:12pm

Thanks for the correction, SA. +5d.

/ravi

Sergey Alexandrovich Kryukov 25-Feb-15 12:59pm

Thank you, Ravi.
—SA

Solution 2

This is the way: (pX + x / 2), (y / 2 - pY)

Posted 25-Feb-15 5:27am

Cesar Bretana Gonzalez

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Sergey Alexandrovich Kryukov · Accepted Answer · 2015-02-25T05:48:00

It is quite possible for certain aspects with certain UI or graphics libraries. You did not specify what you want to use — please see my comment to the question.

With System.Drawing.Graphics:
https://msdn.microsoft.com/en-us/library/system.drawing.graphics.transform%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.drawing.drawing2d.matrix%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/system.drawing.graphics%28v=vs.110%29.aspx[^].

WPF: https://msdn.microsoft.com/en-us/library/ms750596%28v=vs.110%29.aspx[^].

Anything else? You just have to ask, but ask providing sufficient information.

—SA