MATLAB: GUI pop up menu

matlab gui

Gui pop up menu that i created is not having memory of the past selection…

eg: say popup has 2 options in the order: red blue

if the user has selected blue first time, then second time, since by default, popup shows red….user (who wants to now select red), leaves it untouched…but gui actually works with the memory of blue's selection…

I have tried some techniques to solve this but nothing seems to work.. Any suggestions….?

Best Answer

The popup will not automagically change from blue to red - you must have told it to in code, or the user changed it to red. It will not change by itself from blue (which the user just selected) to red.

If the GUI uses "blue" but the popup actually displays "red" then you're not getting the value of the popup when you need to use it. Get it like this

selectedItem = get(handles.popup1, 'Value');

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MATLAB: Linking a pushbutton to two dropdown menus in GUIDE

vedesh - in the pushbutton callback, you would use the handles structure to get the selections from the two dropdown menus. Your code could look something like the following

function pushbutton1_Callback(hObject, eventdata, handles) 
% get the selection from the first drop down menu
popup1List = get(handles.popup1,'String'); % get the list of items of popup1
popup1Index = get(handles.popup1,'Value'); % get the index of the selected item of popup1
popup1Value = popup1List{idx};             % get the value of the selected item of popup1
% get the selection from the second drop down menu
popup2List = get(handles.popup2,'String'); % get the list of items of popup2
popup2Index = get(handles.popup2,'Value'); % get the index of the selected item of popup2
popup2Value = popup2List{idx};             % get the value of the selected item of popup2
% note that popup1Value and popup2Value are strings so you may need to convert to numbers is
% applicable
% do whatever work you need to and draw line on axes

MATLAB: Need help understanding the popup menu in GUI.

Matt - use the Value property of the pop-up menu control to set and get the index of the selected item. For example, to default the menu to the second item in the list, copy the following into the OpeningFcn of your GUI (I'm assuming that you are using GUIDE to create your GUI)

 set(handles.popupmenu1,'Value',2);

So now, when the GUI is launched, the second item will be selected. Now, to get the index of the item that has been selected, do the following (in whatever callback that is appropriate)

 idx = get(handles.popupmenu1,'Value');

Try the above and see what happens!

Best Answer

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