Uitable very slow updating displayed data

Question

claudio 2021-6-25

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/865075-uitable-very-slow-updating-displayed-data

回答： leila sa 2022-6-14

Hi all

I create a small GUI where three uitable are implemented to display some data. Interactively data can be modified or completely changed. In this second situation the data change become very slow (~50 seconds for displaying 20x20 data, double type). To speed up the process I used the 'setValueAt()' method taking the control of the proper java handle related to the uitable. But without any improvement. What is the hidden bottle neck?

the following code show the callback used to set the data

function setDataToTable(dataTable)
% dataTable = struct with array of doubles
% table = handle of table
        
%         profile on
        
        fcn = table.DataChangedCallback;                                           
        table.DataChangedCallback = [];                                     % disable for a while to avoid refresh for each value
        kk = 0;  jj = 0;        
        if isfield(dataTable,'newData')                                     
            for kk = 1:size(dataTable.newData,2)
                for jj = 1:size(dataTable.newData.value,1)
                    table.setValueAt( ...
                        dataTable.newData(jj,kk),jj - 1,kk - 1);
                end
            end
        end
        
        table.DataChangedCallback = fcn;                                    % restore callback
        
                
%         profile off
%         profile viewer
        
    end