Window Content Size Avail Content Region GetContentRegionAvail Content Region x window system device context mouse CursorPosition position calculation area GetContentRegionAvail

 https://www.codeproject.com/Articles/1944/Guide-to-WIN32-Regions

 https://github.com/ocornut/imgui/issues/1281

https://github.com/ocornut/imgui

Content Region shape windows MS rgn GetWindowRgn 

GetContentRegionMaxAbs / GetContentRegionAvail

https://github.com/ocornut/imgui/issues/1490

https://en.wikipedia.org/wiki/Pick%27s_theorem

shape Content Region Coordinates in the graph Position area Region Avail Using pgfplots to make economic graphs

shape Region graph area Region Avail make economic graphs Find Area Between Curves Graphs

How to Translate a Shape on a Coordinate Grid Using a Vector

whether two shapes overlap window MS  shapes are overlapping

https://www.geeksforgeeks.org/find-two-rectangles-overlap/

Retrieving Raw Mouse Input with GLFW