How to write your own angle / pen changes for NSWindow?

Question

How can I write my own angle / resize knob for NSWindow? I use a NSWindow subclass without a default resize angle, but I need this for my window.

Answer 1

Main circuit:

• Create a view.
• Place the drag and drop indicator corresponding to your window in the view.
• Ask the drag effect handler to resize the window so that this corner is now in the current position of the mouse.