Positioning a Sheet after using beginSheet:modalForWindow:?

Question

I want to display a window as a sheet, which is perfectly running with the following code:

[NSApp beginSheet:mySheet
   modalForWindow:myWindow
    modalDelegate:nil 
   didEndSelector:NULL
      contextInfo:NULL];

However, there is ONE LITTLE PROBLEM:

• I'm using an implementation of Chromium Tabs, and - for some reason probably related to the inner logic of Chromium Tabs - the sheet seems to appear somewhat LOWER than where I'd want it to be... (Perhaps that's what is considered as the window "border", but anyway...)

What's wrong? How could I fix that?

Answer 1

Just found it :

In the window's delegate, we implement window:willPositionSheet:usingRect: like this

- (NSRect)window:(NSWindow *)window willPositionSheet:(NSWindow *)sheet 
       usingRect:(NSRect)rect 
{
    rect.origin.y += 11;  // or as much as we need
    return rect;
}