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Creating a New Composer


A new composer file can be created by choosing one of the first seven items on the Create menu in the Simplicity IDE. These items are also on the Button Bar in the IDE.

Types of Composers

The seven composer types are

  1. Main Application
  2. Frame
  3. Window
  4. Dialog
  5. Panel
  6. Object
  7. Canvas

Each type of composer allows the user to create a different type of compound object. A Main Application Composer is used to create either a Java Applet (usually to be embedded in a web page) or the primary frame of a Java Application. The Frame, Window, and Dialog Composers are used to create secondary windows which can be launched from a Main Application. The Panel Composer is used to create compound parts which can be reused in other composers. The Object Composer is used to create non-graphical parts. The Canvas Composer is significantly different from the other composers and will be described in its own chapter.

Each composer will generate a single Java source file corresponding to a public class as well as any supporting inner classes.

When a Composer is opened from within the IDE, three windows appear (except in the case of an Object Composer). These three windows are the Composer window, the Object Palette, and the Working Model window.


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