User`s guide

8 Programming a GUIDE GUI
@(hObject,eventdata)mygui('pushbutton1_Callback',hObject,eventdata,guidata(hObject))
The syntax @(hObject,eventdata) indicates that this is a n anonymous
function. The signature enables MATLAB to execute the right callback when
the user clicks this push button by providing the following information.
• The name of the file in which the callback function resides (
'mygui')
• Thenameofthecallbackfunctionwithinthefile(
'pushbutton1_Callback')
• The argument list to pass to the callback function:
1 hObject — The handle of the component issuing the callback (a push
button, in this case)
2 eventdat a — A structure containing event data generated by the
component (for push buttons and o ther components that generate no
event d ata, this argument contains an empty matrix)
3 guidata( hObject) — The “handles Structure” on page 8-22 for the GUI,
used to communicate component handles between callbacks
The fo llowing figure illustrates how these elements relate to one another.
8-18