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double-click on "uilistbox" App designer

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joe
joe on 11 Jul 2019
Hallop everyone,
How can I execute a double-click on ListBox in App Designer?
Thank you in Advance

Answers (2)

Kevin Chng
Kevin Chng on 23 Jan 2020
Edited: Kevin Chng on 23 Jan 2020
Up to R2019b, app designer dont have this feature,
It is because if you click on the selected item, no event will be triggered. Therefore, we could say only single click is allowed under this limitaion.
You can use button to replace list box. [toggle button group will behave same as list box, so you could not use this], use the 'normal' button for this.
For example :
Step 1 : For example : 3 selection: Create 3 button
1.jpg
Step 2 : Create callback function for each of them (it is a bit tedious, I have 3 button, then I have 3 callback function)
2.jpg
Step 3: Create private function click
3.jpg
Step 4 : here you go:
(Single Click the button, it turns blue)
4.jpg
(Double Click the button, it turns red)
5.jpg
You might have further question about ‘howand where could you put your algorithm:
You could put your algorithm in the click function
6.jpg

Chidvi Modala
Chidvi Modala on 18 Jul 2019
In guide, To make the double-click work you only need to write the code below in List box callback
function listbox_Callback(hObject, eventdata, handles)
if strcmp(get(gcf,'selectiontype'),'open')
% here you write write code, which you wanna be executed afer double-click
end
In App designer, associate the below function with ValueChangedFcn callback of the List Box.
function clickcallback(obj,evt)
persistent chk
if isempty(chk)
chk = 1;
pause(0.5); %Add a delay to distinguish single click from a double click
if chk == 1
fprintf(1,'\nI am doing a single-click.\n\n');
chk = [];
end
else
chk = [];
fprintf(1,'\nI am doing a double-click.\n\n');
end
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