By Matthew Scarpino

Protecting Eclipse's new strength for development graphical consumer interfaces with model 3.0, the traditional Widget Toolkit (SWT) and JFace, this consultant demonstrates how those award-winning instruments have bought wide aid for developing computer purposes. concept and functional examples show easy methods to construct GUIs that mix the feel and appear of local interfaces with the platform independence of Java. This advisor additionally exhibits how SWT uses the widgets supplied through the working process and describes how those parts might be linked to occasions, boxes, and snap shots. With this data, programmers can construct totally featured person interfaces that converse without delay with the underlying platform. JFace's skill to simplify and arrange the method of GUI layout is then tested, permitting builders to switch and adapt elements, and separate their details from their appearance.

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Additional info for SWT JFace in Action, Manning

Example text

For this reason, we need to investigate the Control class. 2 Working with Control objects As we mentioned in chapter 2, SWT/JFace uses widgets provided by the operating system to render its graphical applications. Since different platforms offer different sets of GUI components, SWT can fully support only a subset of these widgets. Objects in the Control class have a direct counterpart in the operating system that you can access through the class’s handle field. However, SWT still provides a number of widgets outside the Control class.

2 The Display class Although the Display class has no visible form, it keeps track of the GUI resources and manages communication with the operating system. That is, it concerns itself with how its windows are displayed, moved, and redrawn. It also ensures that events such as mouse clicks and keystroke actions are sent to the widgets that can handle them. Operation of the Display class Although the Display class may only appear in a few lines of your GUI code, it’s important to respect and understand its operation.

Since the only argument in HelloSWT’s Shell declaration is the display, it receives the default style for top-level windows, called SHELL_TRIM. CLOSE) the shell. BORDER), and the ability to be closed. Within your GUIs, you can set the style bits of the shell, or another widget, to whatever you prefer, and combine them with the | operator. In addition to the properties mentioned, you can also specify the shell’s modality, which restricts the user’s ability to alter the shell’s state. A modal dialog box commands the user’s attention by blocking all actions except those related to the dialog.

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