Chapter 20. Extending the GUI
In this chapter you'll investigate how you can improve the graphical user interface (GUI) for Sketcher. After adding a status bar, you'll be creating dialogs and exploring how you can use them to communicate with the user and manage input. Another GUI capability you'll be looking at is context menus, which are pop-up menus that vary depending on the context in which they are displayed. You'll be using context menus to enhance the functionality of the Sketcher application. All of this will give you a lot more practice in implementing event listeners, and much more besides.
In this chapter you'll learn:
How to create a status bar
How to create a dialog
What a modal dialog is and how it differs from a non-modal dialog
How to create a message box dialog
How you can use components in a dialog to receive input
What a pop-up menu is
How you can apply and use transformations to the user coordinate system when drawing on a component
What context menus are and how you can implement them
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