I would like to be able to draw a sqaure grid that I could plot points of a line using a mouse.
The line will be drawn from the leftmost part of the grid to the rightmost point of the grid at anytime there is 2 or more points. If there is more than 2 points drawn the line will follow straight paths to each point from left to right until it connects to the rightmost point.
I would like to limit the points to be able to be placed ONLY on the intercection of the gridlines AND one point PER VERTICAL COLUMN (If a point is attempted to be created on the same column the old point will disapper and the new one will take its place on the column).
I will award 500 points for the best answer that works.
I have included a sample of a grid I would like to be able to match (except I would like the gridlines to be spaced equally - vertically as well as horizontally - so that the grid is squared)