How to account for the size of a window's peripheries when resizing

How to account for the size of a window's peripheries when resizing

Brett208 29 Jul 2016 09:25

When resizing a window in XNA, I use

graphicsDeviceManager.PreferredBackBufferWidth = width;
graphicsDeviceManager.PreferredBackBufferHeight = height;

However if the game is not in full screen mode on a PC monitor, this code sets the size of the content within the window. This doesn't account for the size of the window's peripheries (like the minimize/exit button on the top and the slim borders around the window. So what I really want is to set the total size of the window or subtract the size of the window's borders when setting the size of the content within the window. Does anyone know how to do this?

Re: How to account for the size of a window's peripheries when resizing

PiscesMike 31 Jul 2016 08:13

Seems like I was reading about this somewhere. If I recall correctly, what you want is the 'client area' - that is, the area inside of the frame. Anyways, don't remember all the details, but this might help:

https://social.msdn.microsoft.com/Forums/vstudio/en-US/a3740821-a45a-444b-bc06-1ef871e3f032/window-and-client-area-properties-workaround?forum=xnaframework

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"May the mercy of His Divine Shadow fall upon you." - Stanley H. Tweedle, Security Guard class IV, The League of 20,000 planets

Re: How to account for the size of a window's peripheries when resizing

Brett208 01 Aug 2016 01:59

@PiscesMike,

Thank you for the great tip! That link contained exactly what I needed. XNA doesn't appear to have a built in way to handle the size of the window itself, just the client area within a window. By referencing System.Windows.Forms and System.Drawing, I am able to use the following code to get the needed info:

System.Drawing.Size borderSize = SystemInformation.FrameBorderSize;
int titleBarHeight = SystemInformation.CaptionHeight;

• FrameBorderSize is the thickness in pixels of the resizing border around the window. (8 pixels per border for standard Windows 7 theme.)
• CaptionHeight is the height in pixels of the window's title bar. (22 pixels for standard Windows 7 theme).

After finding these two values, it is just a matter of doing the math to determine how big to set the client area in order to get the desired total window size.

Last edited on 01 Aug 2016 03:13 by Brett208 Show more

Re: How to account for the size of a window's peripheries when resizing

PiscesMike 02 Aug 2016 05:00

You're quite welcome! Glad I could be of help!

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"May the mercy of His Divine Shadow fall upon you." - Stanley H. Tweedle, Security Guard class IV, The League of 20,000 planets