The Pie Chart Widget

In this lesson we will plan and implement a Pie Chart widget.

We will

• Decide how the Pie Chart should look
• Decide what properties the Pie Chart should have
• Decide what messages the Pie Chart should send
• Implement the Pie Chart widget in steps
  • Define the Properties
  • Implement OnCreate
  • Implement OnPaint
  • Implement OnGeometryChanged
  • Implement OnSave
  • Implement OnLoad
  • Respond to mouse events
• Document the widget
• Package and install the widget