MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guide de l'utilisateur télécharger pdf (Page 111)

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GUI Options

GUIDE also adds a callback whenever you edit a callback routine from the

Layout Editor’s right-click context menu and when you add menus to the

GUI using the Menu E ditor.

See “Customizing Callbacks in GUIDE” on page 8-15 for general information

about callbacks.

Note This option is available only if you first select the Generate FIG-file

and MATLAB file option.

GUI Allows Only One Instance to Run (Singleton)

This option allows you to select between two behaviors for the GUI figure:

• Allow M ATLAB software to display only one instance of the GUI at a time.

• Allow MATLAB software to display multiple instances of the GUI.

If you allow only one instance, the software reus es the existing GU I figure

whenever the command to run the GUI is issued. If a GUI already exists, the

software brings it to the foreground rather than creating a new figure.

If you clear this option, the software creates a new GUI figure whenever you

issue the command to run the GUI.

Even if you allow only one instance of a GUI to run at once, initialization can

take place each time you invoke it from the command line. For example, the

code in an

OpeningFcn will run each time a GUIDE GUI runs unless you take

steps to p revent it from doing so. Adding a flag to the

handles structure is one

way to control such behavior. You can do this in the

OpeningFcn, which can

run initialization code if this flag doe sn ’t ye t exist and skip that code if it does.

Note This option is available only if you first select the Generate FIG-file

and MATLAB file option.

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