How do i add search functionality into my drop down menu in my GUI?

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I have a GUI that loads data and plots it. I have drop down menus for selecting the parameters to plot. I wanted to add search functionality to the drop down menu. Any suggestions?

Answers (2)

Arsalan jamialahmadi
Arsalan jamialahmadi on 13 Feb 2019
You can add en uieditfield called MyEditField to your app and for that apply a "ValueChanging" callback to be able to search your MyDropDown:
changingValue = event.Value;
List=[];
if ~isempty(app.MyEditField)
for i=1:length(app.OriginalList)
if contains(app.OriginalList{i},changingValue)
List=[List,app.OriginalList(i)];
end
end
end
if isempty(app.MyEditField)
List=app.OriginalList;
end
if ~isempty(List)
app.MyDropDown.Items=List;
end
if isempty(event.Value)
app.MyDropDown.Items=app.OriginalList;
end
if ~isempty(event.Value) && isempty(List)
app.MyDropDown.Items={};
end

Bereketab Gulai
Bereketab Gulai on 25 May 2020
Here is much Modified of Arsalan jamialahmadi
% Value changing function: TestTypeSearchEditField
function TestTypeSearchEditFieldValueChanging(app, event)
persistent originalTestTypeList; % save the original list
if isempty(originalTestTypeList)
originalTestTypeList = app.TestTypeDropDown.Items;
pause(0.5); % sync value (in case...)
end
changingValue = event.Value;
Utility.filterDropdownList(app.TestTypeDropDown, originalTestTypeList, changingValue);
end
In Utility Class (You can create this)
function filterDropdownList(uidropdownControl, originalList, changingValue)
List=[];
if ~isempty(changingValue)
for c = 1:length(originalList)
if contains(originalList{c},changingValue, "IgnoreCase",true)
List = [List,originalList(c)];
end
end
end
if ~isempty(List) % Something is found
uidropdownControl.Items = List;
elseif ~isempty(changingValue) && isempty(List) % Nothing is found
uidropdownControl.Items = {};
else % Restore otherwise
uidropdownControl.Items = originalList;
if isempty(uidropdownControl.ItemsData)
uidropdownControl.Value = originalList{1};
else
if isnumeric(uidropdownControl.ItemsData)
uidropdownControl.Value = uidropdownControl.ItemsData(1);
else
uidropdownControl.Value = uidropdownControl.ItemsData{1};
end
end
end
end

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