Creating a new Composer

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A new Composer file can be created by selecting one of the menu items on the Create menu in the Simplicity Professional IDE. These items are also on the Button Bar in the IDE.

Types of Composers

The Composer types include

1. Main Application
2. Frame
3. Window
4. Dialog
5. Panel
6. 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 Canvas Composer, used to create new graphical reusable components, is significantly different from the other Composers and is desbribed in the Canvas Composer 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. These three windows are the Composer window, the Object Palette, and the Working Model window.