How can i access elements of popup menu and use it in Push Button callbacks?

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ANURAG DEEPAK 2019-9-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480555-how-can-i-access-elements-of-popup-menu-and-use-it-in-push-button-callbacks

评论： ANURAG DEEPAK 2019-9-16

function popupmenu1_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
popchoice1 = contents(get(hObject,'Value'));
if (strcmp(popchoice1,'choice 1'))
    pop1val=10;
elseif (strcmp(popchoice1,'choice 2'))
    pop1val=20;
elseif(strcmp(popchoice1,'choice 3'))
    pop1val=30;
end
set(handles.popupmenu1,'UserData',pop1val);
assignin('base','pop1val',pop1val);
function popupmenu2_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
popchoice2= contents(get(hObject,'Value'));
if (strcmp(popchoice2,'a'))
    pop2val=40;
elseif(strcmp(popchoice2,'b'))
    pop2val=50;
elseif(strcmp(popchoice2,'c'))
    pop2val=60;
end
set(handles.popupmenu2,'UserData',pop2val);
assignin('base','pop2val',pop2val);
function pushbutton1_Callback(hObject, eventdata, handles)
pop1val=get(handles.popupmenu1,'UserData');
pop2val=get(handles.popupmenu2,'UserData');
c=pop1val*pop2val;
set(handles.edit1,'Value',str2double(c));

In the above probelm i need to calculate mutiplication of two numbers based on choices of two popup menu data and need to access that data in push button callback to calculate the mutiplication.

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Adam 2019-9-16

https://uk.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html

gives details of the various ways to share data between callbacks in a GUI. Personally I use the guidata approach when working with a GUIDE GUI.

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Answer 1

Ankit 2019-9-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480555-how-can-i-access-elements-of-popup-menu-and-use-it-in-push-button-callbacks#answer_392065

在 MATLAB Online 中打开

Hello Anurag,

You can use either of the following solutions:

Solution.1: As you are assigning the values to the workspace you can read it by using evalin command.

function pushbutton1_Callback(hObject, eventdata, handles)
pop1val=evalin('base','pop1val');
pop2val=evalin('base','pop2val');
c=pop1val*pop2val;
set(handles.edit1,'string',c); % here you don't have to convert as the value already in double.

Solution.2:

assignin('base','pop1val',pop1val) This statement you don't require in your code. As you already setting the value of 'UserData' for popupmenu (set(handles.popupmenu1,'UserData',pop1val);)

This is how your code looks now:

function popupmenu1_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
popchoice1 = contents(get(hObject,'Value'));
if (strcmp(popchoice1,'choice 1'))
    pop1val=10;
elseif (strcmp(popchoice1,'choice 2'))
    pop1val=20;
elseif(strcmp(popchoice1,'choice 3'))
    pop1val=30;
end
set(handles.popupmenu1,'UserData',pop1val);
function popupmenu2_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
popchoice2= contents(get(hObject,'Value'));
if (strcmp(popchoice2,'a'))
    pop2val=40;
elseif(strcmp(popchoice2,'b'))
    pop2val=50;
elseif(strcmp(popchoice2,'c'))
    pop2val=60;
end
set(handles.popupmenu2,'UserData',pop2val);
function pushbutton1_Callback(hObject, eventdata, handles)
pop1val=get(handles.popupmenu1,'UserData');
pop2val=get(handles.popupmenu2,'UserData');
c=pop1val*pop2val;
set(handles.edit1,'string',c);