How to merge the waitbar into UIcontrol GUI

John Michell answered . 2025-07-14 13:47:23

Statisticalbeginner - rather than using a slider to record your progress, consider using an axes object which you would then draw an image representing the progress completed. For example, your GUI may have an axes for  plotting something, a push button to kick-off the processing, and another axes to record progress. If you give your GUI a unique Tag (see the properties inspector for your GUI) and set its HandleVisibility property to on, then your main program can look for this GUI and update the axes that has been designated as the wait (or progress) bar.

 

 function updateWaitBar
        % find the GUI whose tag is GuiWaitBarExample (GUI HandleVisibility
        % property must be set to on)
        hGui = findobj('Tag','GuiWaitBarExample');
        if ~isempty(hGui)

            % get the GUI handles structure
            handles = guidata(hGui);

            % axes2 is the waitbar
            if ~isempty(handles) && isfield(handles,'axes2')

                % if the waitBarImg doesn't exist, then create it and the
                % image graphics object
                if ~isfield(handles,'waitBarImg')
                    handles.waitBarImg  = uint8(ones(1,maxIters,3)*255);
                    handles.hWaitBarImg = image(handles.waitBarImg,'Parent',handles.axes2);
                end

                % reset to a white background
                if k == 1
                    handles.waitBarImg(:,:,:) = 255;
                end

                % set the progress complete portion of the wait bar
                handles.waitBarImg(:,k,1) = 255;  % red
                handles.waitBarImg(:,k,2) = 0;    % green
                handles.waitBarImg(:,k,3) = 0;    % blue

                % update the "drawn" image graphic object with the new data
                set(handles.hWaitBarImg,'CData',handles.waitBarImg);

                % ensure that the axes and ticks are hidden
                bgClr = get(handles.GuiWaitBarExample, 'Color');
                set(handles.axes2,'XTick',[],'YTick',[],'XTickLabe',[],'YTickLabel',[],'XColor',bgClr,'YColor',bgClr);

                % save the updated handles structure
                guidata(hGui,handles);
            end
        end
    end
 end

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