Button Down fcn for Listbox

Hey Guys,

I want to enable the buttondownfcn for my Listbox.Due to the fact that this code works only for the RightMouseButton, i guess the LeftMouseButton has already another fcn.

The Question: Is there a way to "delete" the listbox Callback,so i can use my Callback for every MouseButton ?

function ArithmeticalMeanButton_Callback(hObject, eventdata, handles)

       Data = findobj('tag','PlotedShotsListbox');
              set(Data,'buttondownfcn',@ClickToChose);

      function ClickToChose(gcbo,evendata,handles);
               ListboxContent = get(gcbo,'String');
               ListboxLine = get(gcbo,'Value');
               ChosenLine = ListboxContent(ListboxLine);

Answer 1

[Yu Jiang]

Hi Max

In MATLAB GUI, a left mouse click triggers the execution of the listbox's Callback function and a right mouse click triggers ButtonDownFcn.

Therefore, if you would like to execute the same callback function from either the left or the right mouse button click, you may need to assign your function ClickToChose to both the 'ButtonDownFcn' and the 'calllback'.

That is to say, in the function ArithmeticalMeanButton_Callback, you may need to add the following line

set(Data,'callback',@ClickToChose);

More details of the ListBox component can be found here

http://www.mathworks.com/help/matlab/creating_guis/add-code-for-components-in-callbacks.html#f10-1001494

A good example showing how to use ListBox can be seen via the following link

http://www.mathworks.com/help/matlab/creating_guis/interactive-list-box-in-a-guide-gui.html

In addition, I have noiced that you use findobj to get the handle of 'PlotedShotsListBox'. Have you considered directly obtain that from handles structure? For example, you may change the line

Data = findobj('tag','PlotedShotsListbox');

to

Data = handles.PlotedShotsListbox;

This might be able to improve the efficiency of your code.

-Yu

[Max Müller]

i dont know what to say.....this is a perfect answer. Thanks so much. I will read the links to improve my matlab skills.

I hope I dont annoy u if I ask for one more favor. I need to learn more about matlab handles.....do u know any side where I can find a good comparison ?

[Yu Jiang]

You are welcome and please free feel to post more questions, if any.

You can find the detailed documentation regarding MATLAB handle classes via the following link

http://www.mathworks.com/help/matlab/handle-classes.html

I would suggest you go through the examples on that webpage.

Since the handle class is part of the Object-Oriented Design in MATLAB, you may want to read the introduction to it at the following address

http://www.mathworks.com/help/matlab/object-oriented-design-with-matlab.html

You can also find a good tutorial video there.

-Yu Jiang

[Max Müller]

Boom...that stuff is gold worth...thank...