Creating Graphical User Interfaces

Application Allows Only One Instance to Run

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

• Allow MATLAB to display only one instance of the GUI at a time.
• Allow MATLAB to display multiple instances of the GUI.

If you allow only one instance, MATLAB reuses the existing GUI figure whenever the command to launch the GUI is issued. If a GUI already exists, MATLAB brings it to the foreground rather than creating a new figure.

If you uncheck this option, MATLAB creates a new GUI figure whenever the command to launch the GUI is issued.

Code in the Application M-File

GUIDE implements this feature by generating code in the application M-file that uses the openfig command. The reuse or new string specifies one instance or multiple instances of the GUI figure.

fig = openfig(mfilename,'reuse');

or

fig = openfig(mfilename,'new');

Note    Ensure that you have only one occurrence of openfig in your application M-file, including in commented lines.

Generating Callback Function Prototypes

Using the System Background Colors