MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 222)

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8 Programming a GUIDE UI

8-6

If you decide to change the Tag value after saving the UI, then GUIDE updates the

following items (assuming that all components have unique Tag values).

• Component's callback function definition

• Component’s callback property value

• References in the code file to the corresponding field in the handles structure

To rename a callback function without changing the component’s Tag property:

Change the name in the callback function definition.

Update the component’s callback property by changing the first argument passed

to the anonymous function. For example, the original callback property for a push

button might look like this:

@(hObject,eventdata)myui('pushbutton1_Callback',...

hObject,eventdata,guidata(hObject))

In this example, you must change the string, 'pushbutton1_Callback' to the new

function name.

Change all other references to the old function name to the new function name in the

UI code file.

Deleting Callbacks

You can delete a callback function when you want to remove or change the function that

executes when the end user performs a specific action. To delete a callback function:

Search and replace all instances that refer to the callback function in your code.

Open the UI in GUIDE and replace all instances that refer to the callback function

in the Property Inspector.

Delete the callback function.

More About

• “Anonymous Functions”

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