Calling a pushbutton inside a GUI

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Paul
Paul 2011-9-13
I have a fairly large program I have been working on for my masters project.
There is a pushbutton called braking that does some calculations and at the end I have this below to store the calculated values into two handles.
handles.break_dis=gdist;
handles.break_vel=gvel;
guidata(hObject,handles)
Then in a separate pushbutton called start I have
braking_Callback(hObject, [], handles);
values=handles.break_dis
If I click on the braking button then the start button it works.
If i click directly on the start button it runs the code in the braking button but when it gets to the values=handles.break_dis line it says "Reference to non-existent field 'break_dis'"
I'm not sure what is happening.

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采纳的回答

Walter Roberson
Walter Roberson 2011-9-13
After your line
braking_Callback(hObject, [], handles);
you need to add
handles = guidata(hObject);
You got a local copy of the handles structure, so when the handles structure was updated elsewhere in the program, your local copy was not updated. You need to fetch the updated version.

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