How can I have 'dropdown' in an individual cell of a table in App Designer ?

Hello,

with reference to this previous resolved question, I would like to apply a drop down list to a single cell of the table and not to the whole column.

https://www.mathworks.com/matlabcentral/answers/452199-how-can-i-have-dropdown-in-every-cell-of-a-table-in-app-designer

Is it possible by using table or can you suggest a better implementation?

app.UITable.Data = {'female';'male';'male'}; % have 3 rows of gender information.
app.UITable.ColumnFormat = {{'male', 'female'}}; % have option cell array within ColumnFormat property to indicate the 1st column is using dropdown menus.
app.UITable.ColumnEditable = true;

Answer 1

[gaoyi guo]

I have solved it perfectly! Please adopt my answer if it is helpful!

My version is 2021a.

I used the 'categorical' function:

fig = uifigure;
a = categorical({'Blue','Red'}); % define a categorical type of variable a
col1 = {a(1);200}; % the recipe is quote an element in a!!!!
col2 = [400;'x'];
tdata = table(col1,col2); % define a table using the above columns
uit = uitable(fig,'Data',tdata,'ColumnEditable',true);

[xiao yu]

Hi,

I am inspired by your approach and added a callback function.

Once a value changed in the first column, the corresponding row of the second column (not the whole column) will be changed to the corresponding category.

fig = uifigure;
channelNames=cell(10,1);
LabelNames=cell(10,1);

for i=1:10
    if i<10
    channelNames{i}=['channel 10' num2str(i)];
    LabelNames{i}=['channel 10' num2str(i)];
    else
    channelNames{i}=['channel 1' num2str(i)];
    LabelNames{i}=['channel 1' num2str(i)];
    end    
end

Meas={'Voltage';'Thermocoupler'};
TypesV= {'DC';'AC'};
TypesT= {'J';'Y'};

Meas=categorical(Meas); 
TypesV=categorical(TypesV);
TypesT=categorical(TypesT);

Meas1={Meas(1);Meas(1);Meas(1);Meas(1);Meas(1);Meas(1);Meas(1);Meas(1);Meas(1);Meas(1)};
Type1={TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1);TypesV(1)};

tdata = table(Meas1,Type1,LabelNames,'VariableNames',{'Mea','Type','Label'}); % define a table using the above columns
uit = uitable(fig,'Data',tdata,'ColumnEditable',true,...
      'CellEditCallback',@(hObject,event)updateTable(hObject,event,TypesV,TypesT));
uit.UserData=tdata;

%%

function updateTable(hObject,event,TypesV,TypesT)
    idx=event.Indices;
    newData=event.NewData;
    olddata=hObject.UserData;
    tdata=hObject.Data;

    row=idx(1);    
    col=idx(2);
     
   if  olddata.Mea{row}~=string(newData) && col==1
       % consider only changes in the first column
       if contains(string(newData),'Voltage')
            tdata.Type{row}=TypesV(1);
       elseif contains(string(newData),'Thermocoupler')
            tdata.Type{row}=TypesT(1);
       end
       hObject.Data=tdata;
       hObject.UserData=tdata;

   end
end

Answer 2

[Sahithi Kanumarlapudi]

Hi,

'uidropdown' is normally used to create a dropdown in MATLAB. But, it's parent can only be 'Figure object (default) | Panel object | Tab object | ButtonGroup object | GridLayout object' as per the documentation here as of now.

Hope this helps!