The user wants visual feedback when spawning lines or rectangles (if Choose size of rectangle by clicking to points
#55 has been done already) after the initial click to keep track of how the newly spawned element will affect the canvas.
This could be done by attaching the second point to the mouse after the initial click, so that the elements get drawn continously until the second click, when the element finally gets placed for good
The user wants visual feedback when spawning lines or rectangles (if Choose size of rectangle by clicking to points #55 has been done already) after the initial click to keep track of how the newly spawned element will affect the canvas. This could be done by attaching the second point to the mouse after the initial click, so that the elements get drawn continously until the second click, when the element finally gets placed for good