how to get uicontrol value inside a callback function?
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Hi, I have a have written a function which has several callback functions. My function acts on a figure. I have added a uicontrol button to my figure and this is where my problem starts.
I would like to get the value of the GUIbutton state while I am still inside another callback function.
%==another callback function===
button1 = uicontrol('Style','pushbutton', 'Value', f,'pos',...
[20 10 10 10],'string','text_here');
state=get(handles.button1, 'Value');
if state==1;%button is clicked
%do something
else
%do something else
end
%===another callback function====
this doesnt work, because the class handles is undefined, but unfortunately I am unable to understand how to fix it.
采纳的回答
Walter Roberson
2015-9-23
0 个投票
Functions cannot have callbacks. Objects (especially graphic objects) can have callbacks.
2 个评论
lou
2015-9-24
Walter Roberson
2015-9-24
编辑：Walter Roberson
2015-9-24
If you are using GUIDE, then you get() the Value property of the handles structure entry named the same thing as the Tag of the toggle button. For example,
get(handles.togglebutton1, 'Value')
If you are not using GUIDE or you are creating the toggle button dynamically then you need to use one of the techniques for sharing data from the link I posted.
更多回答（1 个）
The easiest way would be to use nested functions, then the variable handles is visible inside the callback workspaces as well, without needing to pass it explicitly:
function main
handles.cancelBut = ...
...
function callback_cancel_button
get(handles.cancelBut,'Value')
end
end
Otherwise you should read the documentation, which describes all of the ways to pass variables (e.g. your handles structure) between callbacks:
1 个评论
Walter Roberson
2015-9-24
If you are using GUIDE, then this is not the easiest way, as GUIDE historically does not terminate each function with a matching "end" statement as is required for all functions in the same file if you want to use nested functions.
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