Ivor Horton's Beginning Java™ 2, JDK™ 5th Edition

20.6. Summary

In this chapter you've learned how to use dialogs to manage data input. You have also learned how to implement context menus, which can bring a professional feel to the GUI in your applications. You have applied scrollbars to varying data values as well as scrolled a window, so you should be in a position to use them in whatever context you need.

The important points I have covered in this chapter are:

• A modal dialog blocks input from other windows in the same application as long as it is displayed.

• A non-modal dialog does not block input to other windows. You can switch the focus between a non-modal dialog and other windows in the application whenever necessary.

• The JOptionPane class provides static methods for creating simple dialogs.

• A pop-up menu is a menu that can be displayed at any point within the coordinate system of a component.

• A context menu is a pop-up menu that is specific to what lies at the point where the menu is displayed—so the contents of the menu depend on the context.

• A context menu is displayed as a result of a pop-up trigger, which is usually a right mouse-button click for a right-handed mouse setup.

• The AffineTransform class defines an affine transformation that can be applied to a graphics context and to a Shape object.

• A Graphic2D object always contains an AffineTransform object, and the default transform leaves coordinates unchanged.

• The transform for a graphics context is applied immediately before user coordinates for a shape are converted to ...