Any number of points

[xiuda]

The privazy_zones app should be able to handle any number of points (3 or more) to define a zone. The current is hard-coded to 4, but as long as the user keeps clicking it should allow new points to be created. This involves a number of enhancements:

• Addition of points should come with the deletion of unwanted points
• The marker/line indicators auto-complete a shape after 4 markers are placed. How can we have it auto-complete when there is an indefinite number of points to be added?
• We must maintain that points are placed in a clockwise/ccw pattern. (No skipping around)
• If the order of points is not maintained, we must develop a solution to order them cw/ccw before converting them to a QPolygonF object
• Regardless of the number of points, it must be a closed shape (the first and last points in the list are the same point)
• Originally, after 4 points are placed clicking again edits the first point. How can we handle the editing of points if clicking again creates a new point instead of editing them?

[lbowenbiggs]

A point may be edited by dragging it (issue #6). Similar to the map_registration, a point could be deleted by right-clicking. This would keep consistency between the applications.

If we draw a line from the most recently clicked point to the cursor, and a line from the cursor to the first point, I think it should be clear enough to force going in order. Selection tools in GIMP and Photoshop work similarly. To finish the shape you could have a button for "Save Shape" and include a keyboard shortcut (eg, ESC).