You will be implementing a simple drawing program we call ``Scribbler.'' A sample of what your program's interface might look like is shown below.
The Scribbler program has three modes: Draw mode, Move mode, and Color mode. The modes behave as follows:
- Draw mode:
- As the user drags the mouse around in the canvas, the program will draw lines following the path of the mouse.
- Move mode:
- In the mode, the user can reposition a scribble by pressing the mouse while touching some part of the scribble and then dragging the scribble to its new location.
- Color mode:
- Clicking on any scribble while in this mode should change its color to that selected in the color menu.
The program also has an ``Erase Last'' button that will erase the most recently drawn scribble. Pressing the button repeatedly will erase scribbles in the reverse order of which they were drawn.