Adjust NSWindow height from bottom?

Question

Suppose I have a window named mWindow. To increase the height I would do this to the frame:

NSRect windowFrame = [mWindow frame]; 
windowFrame.size.height += 100.0f;
[mWindow setFrame:windowFrame];

However, this increase the height of the top of the window, not the bottom. How can I make it add more window at the bottom instead of the top?

Answer 1

Because of the way coordinates work in Cocoa, you'll have to do some extra steps to make this work:

NSRect windowFrame = [mWindow frame];
windowFrame.size.height += 100;
windowFrame.origin.y -= 100;
[mWindow setFrame:windowFrame display:YES];

Alternatively, you can use the setFrameOrigin: or setFrameTopLeftPoint: methods of NSWindow.

Answer 2

You can always adjust the origin accordingly, i.e. make it higher and move it downwards.