Resize child control width and height in a fixed ratio when windows form resize.

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I am developing a Windows form application. I set the dock Porperty of the child control to Fill, Now the control will resize automatically when I resize main dialog. But I want to resize my chld control to a fixed ratio. How I can do this in windows form application?

(Eg: 40 by 40 to 30 by 30, 20 by 20,50 by 50 etc when I resize my Docked Windows Form application)

Posted 24-Jan-16 23:35pm

Arun Kumar K S

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dan!sh 25-Jan-16 5:40am

So you want your form to be a square all the time?

Arun Kumar K S 25-Jan-16 5:44am

Not Form dialog. I want my child panel control square all the time and need to grow and shrink when I resize Form

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*dan!sh* · Answer 1 · 2016-01-24T23:57:00

Setting Dock to fill would mean that the child control will fill the parent completely. Now in your case, you are looking for a square panel. To achieve this, in the Form's resize event handler, ensure that you are making the panel a square. Something like this:

C#

void Form1_Resize(object sender, EventArgs e)
       {
           panel1.Height = panel1.Width;
       }

You might want to put in some logic as to which side should be retained, height or width. Note that this may result in some flickering.

OriginalGriff · Answer 2 · 2016-01-25T00:01:00

You can't do that automatically - the Anchor and Dock properties are both designed to flex the size of controls independently on the vertical and horizontal, and don't have an option for maintaining an aspect ratio.

You can do it - but you will have to handle the form Resize event and set the appropriate Width and Height of your control yourself.

Resize child control width and height in a fixed ratio when windows form resize.

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