How to reorder the Listbox data ?

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Lavanya
Lavanya on 7 Jul 2022
Commented: Kevin Holly on 14 Jul 2022
I have created GUI:
  • ListBox created, and Move up button in matlab as '.m' it is working
Code:
function moveUp(src,event,lbox)
index_move = ismember(1:length(lbox.Items),lbox.Value);
index_shift = circshift(index_move,-1);
position = 1:length(lbox.Items);
if isequal(lbox.Value,1)
position = circshift(position,-1);
else
value_up = position(index_move);
value_down = position(index_shift);
position(index_shift) = value_up;
position(index_move) = value_down;
end
set(lbox,'Items',lbox.Items(position));
set(lbox,'Value',find(index_shift));
end
  • But the same code is not working in Matlab app designer
Code:
index_move = ismember(1:length(app.ListBox.Items), size(app.ListBox.Value));
index_shift = circshift(index_move,-1);
position = 1:length(app.ListBox.Items);
if isequal(app.ListBox.Value,1)
position = circshift(position,-1);
else
value_up = position(index_move);
value_down = position(index_shift);
position(index_shift) = value_up;
position(index_move) = value_down;
end
set(app.ListBox.Items,app.ListBox.Items(position));
set(app.ListBox.Value,find(index_shift));
Kindly suggest a way for this?

Accepted Answer

Kevin Holly
Kevin Holly on 7 Jul 2022
The following code worked as a callback function for me.
index_move = ismember(app.ListBox.Items, app.ListBox.Value);
index_shift = circshift(index_move,-1);
position = 1:length(app.ListBox.Items);
if isequal(app.ListBox.Value,1)
position = circshift(position,-1);
else
value_up = position(index_move);
value_down = position(index_shift);
position(index_shift) = value_up;
position(index_move) = value_down;
end
set(app.ListBox,'Items',app.ListBox.Items(position));
set(app.ListBox,'Value',app.ListBox.Items(find(index_shift)));
  10 Comments
Lavanya
Lavanya on 13 Jul 2022
Edited: Lavanya on 13 Jul 2022
When we click the listbox, It has data i.e Image data & setup data in panel(read from '.dat ' file)
I have this function in main app and I wanted to execute 'move up' and 'move down ' operations in dialogapp. How to execute this function in 'dialogapp'? In this 'setup_' should update when move up and move down operations used
function updateRunOrder(app,orderconnection,newnames)
% update the order of all ListBoxes
temp_Items = app.ListBox.Items; % all List Boxes schould have the same items
for i=1:length(orderconnection)
% reorder:
app.ListBox.Items{i} = temp_Items{orderconnection(i)};
app.ListBoxGeometry.Items{i} = temp_Items{orderconnection(i)};
% rename:
app.ListBox.Items{i} = newnames{i};
app.ListBoxGeometry.Items{i} = newnames{i};
% change setup assignment:
setup_temp(i) = app.(strcat('setup_', string(i))); % save old setups
end
for i=1:length(orderconnection)
app.(strcat('setup_', string(i))) = setup_temp(orderconnection(i)); %assign saved, old setups to new order
end
% select the stup that is currently shown:
lastval = str2double(app.ListBox.Value{1}); % last shown setup
app.ListBox.Value{1} = num2str(orderconnection(lastval));
app.ListBoxGeometry.Value{1} = num2str(orderconnection(lastval));
end
Kevin Holly
Kevin Holly on 14 Jul 2022
If you are using the function in both apps, I would suggest saving the function as a file that is called from each app. You can change the input to the function based on what app you call from (e.g. updateRunOrder(app,orderconnection,newnames) or updateRunOrder(app.Callingapp,orderconnection,newnames)).

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