How to keep the application contents dimensions the same on OS with different window chrome

In an AIR application the stage is supposed to take all the space in the window.

Apparently everything else that takes up space out of the NativeWindow's bounds is the window's chrome. (Or alsmost everything)

Here's a short code that'll help you keep the size of your window consistent in windows with different chrome.

            resizeWindowTo(200,200);
           
            function resizeWindowTo(initWidth, initHeight){
                //hide the window
                window.nativeWindow.visible = false;
               
                //give some margin to windows
                if (air.Capabilities.os.match(/windows/))
                    initHeight += 5;
               
                //set the window dimensions
                window.nativeWindow.width = initWidth;
                window.nativeWindow.height = initHeight;
               
                //now resize the window to dimensinos to fit the chrome
                window.nativeWindow.height = initHeight + (window.nativeWindow.height - window.nativeWindow.stage.stageHeight);
                window.nativeWindow.width = initWidth + (window.nativeWindow.width - window.nativeWindow.stage.stageWidth);
               
                //show the window
                window.nativeWindow.visible = true;
            }


You might prefer to set your application to open it's window invisible at first and then run the resizeWindowTo function to resize it and show it.

As you can see there's a not very elegant solution which adds 5px margin on Windows, well .. after some testing it seems that there are few pixels coming from something which is not the chrome or the stage on Windows ... 5px will keep you safe on Windows XP default theme, which is (in my humble opinion) the biggest chrome an OS should have at all.

If you find a better solution for the Windows issue - please post it online