How to move an animation with a slider in app designer?

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MSolano 2021-7-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/886619-how-to-move-an-animation-with-a-slider-in-app-designer

评论： Adam Danz 2021-7-27

I made a simple animation of an analog clock in app designer with a while loop and a timer. I have pause and resume buttons and a slider that indicates the simulation time. So far everything works fine but I want to give control to the slider too, just as in a video, where you can drag the slider indicator forwards or backward to the exact time one wants to see.

I would really appreciate any idea. Thank you!

    properties (Access = public)            
        PauseTime = 0; % stores total time paused
        PauseHandle = tic; % stores the handle to the tic to track the time
    end
  
    % Callbacks that handle component events
    methods (Access = private)
        % Button pushed function: StartButton
        function StartButtonPushed(app, event)
            
            close all
            set(app.StartButton,'Text','Restart')
            cla(app.UIAxes);
            
            time = 60;  
            R = 65;  
            ang=linspace(0,2*pi,50);              
            xp=R*cos(ang);                        
            yp=R*sin(ang);  
                                    
                % Animation
                
                % Draw outter circle
                patch(app.UIAxes,xp,yp,'w')
                hold(app.UIAxes,'on');
                axis(app.UIAxes, 'equal');
                f = 0.016;
                
                % Clock hand
                rho1 = 55; 
                line = plot(app.UIAxes,NaN,NaN,'-*', 'LineWidth', 5, 'MarkerSize', 5, 'color', 'r');
               
                t_h=tic;
                app.PauseTime=0;
                while   (toc(t_h)-app.PauseTime) < time
                
                % Clock hand
                t1=toc(t_h)-app.PauseTime;
                f1 = f*360;
                line.XData = [0 rho1*cosd(f1*t1)] ;
                line.YData = [0 rho1*sind(f1*t1)] ;
                
                % Slider 
                t2=toc(t_h)-app.PauseTime;
                app.Slider.Value = t2; 
                
                drawnow
                
                end
        end
        % Button pushed function: PauseButton
        function PauseButtonPushed(app, event)
            app.PauseHandle = tic;
            uiwait(app.animation)
        end
        % Button pushed function: ResumeButton
        function ResumeButtonPushed(app, event)
                        
             app.PauseTime = app.PauseTime + toc(app.PauseHandle);
             uiresume(app.animation)
        end
    end