How to create a drop down list with fixed title?

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Nipurn Gulgulia 2018-2-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/382640-how-to-create-a-drop-down-list-with-fixed-title

评论： Rik 2018-2-15

采纳的回答： Rik

image.png

I want a drop box with title 'Math' under which basic mathematical operations will be there-

BasicOperation = uicontrol(parent, 'Style', 'popup', 'Units', 'normalized', 'ToolTipString', 'Add/Subtract', 'String',{' = ',' + ',' - ',' * ',' / '} );

Like in this image - Title 'MATLAB Central' under which some options are there!

Thanks!

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Adam 2018-2-14

A dropdown list in a panel with a title, or simply with a text box above it would be the simplest option.

Nipurn Gulgulia 2018-2-15

编辑：Nipurn Gulgulia 2018-2-15

@Adam I am doing it in panel only, but i have 5-6 different drop down button. I can't give a single title. Is there any other type of button which i can use?

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采纳的回答

Rik 2018-2-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/382640-how-to-create-a-drop-down-list-with-fixed-title#answer_305107

在 MATLAB Online 中打开

The code below stores the chosen option in handles.BasicOperationString and resets the value back to the first option. You need to add something somewhere to control for the case that the user selects the first option (i.e. the explanatory text).

handles.BasicOperation = uicontrol(...
    'Parent',parent,...
    'Style', 'popup',...
    'Units', 'normalized',...
    'ToolTipString', 'Add/Subtract',...
    'String',{'Basic operations',' = ',' + ',' - ',' * ',' / '},...
    'Callback',@(hObject,eventdata) BasicOperationCallback(hObject,eventdata,guidata(hObject)));
function BasicOperationCallback(hObject,eventdata,handles)%#ok
val=get(hObject,'Value');
str=get(hObject,'String');
handles.BasicOperationString=str{val};
guidata(hObject,handles)%update handle struct
set(hObject,'Value',1);%reset to text
end

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Nipurn Gulgulia 2018-2-15

编辑：Nipurn Gulgulia 2018-2-15

Thanks for your suggestions, I tried to run your code but i am getting error "Undefined function 'BasicOperationCallback' for input arguments of type 'double'."