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ClickPane

represents a clickable pane that displays as image and applies func to the

coordinates of each click within the pane.

specifies the range of coordinates to use.

For a Graphics object g, ClickPane by default takes the range of coordinates supplied to func to be the range of graphics coordinates corresponding to PlotRange in g.

For a general expression, ClickPane takes the range of coordinates to be 0 to 1 in each direction.

Move the point to where the "click" occurred:

Center the disk on mouse clicks:

Move the point to where the "click" occurred:

Out[1]=

Center the disk on mouse clicks:

Out[1]=

Visualize solutions to a linear system of differential equations

Keep track of all solutions as you go:

Create a circle from three points :

Detect whether you are inside or outside a disk:

Make a plot where the arrow "snaps" to the curve when you click inside the pane:

Make a plot where the arrow "snaps" to one of the extrema:

ClickPane is a special case of EventHandler:

For a "click" to register, you must press and release the mouse at the same point:

Use EventHandler to get additional flexibility in registering actions with events: