Java Reference
In-Depth Information
5.
Add a toolbar button to switch highlighting on and off. The same button should turn it on
when it is off and vice versa, so you need to change the button label appropriately.
6.
Add a
Scale
menu item to the element context menu that will allow an element to be scaled
by dragging the mouse cursor.
7.
Implement a main menu item and a toolbar button for choosing a custom color.
