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我正在使用 GUIDE 在 Matlab 中制作 GUI 应用程序。我有轴，我在按钮上绘制一些点。现在我想使用动画线在相同的轴上绘制线。添加到动画线的数据点来自事件。所以我需要在事件监听器中添加数据点。我想知道如何做到这一点，因为该事件侦听器无法访问动画线。以下是到目前为止的代码。

单击按钮时调用此函数-

function startButton_Callback(~, ~, handles)
    x = randi(100, 20);
    y = randi(100, 20);
    plot(x, y, 'o');
    la = newClass;
    addlistener(la,'statusAnnouncement',@StatusListener);

这是事件中调用的函数

function StatusListener(obj, eventData)
    h = animatedline;
    addpoints(h,eventData.coordinate(1),eventData.coordinate(2));
    drawnow

仅显示使用 plot 绘制的点。如何显示动画线？另外，我在命令窗口上没有收到任何错误。

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1 回答 1

0

有几种方法可以让侦听器访问animtedline对象。

  1. 您可以定义StatusListener为startButton_Callback

    function startButton_Callback(~, ~, handles)

    h = animatedline;

    la = newClass;
    addlistener(la,'statusAnnouncement',@StatusListener);

    %// This as a subfunction so it can "see" h
    function StatusListener(src, evnt)
        h.addpoints(evnt.coordinate(1), evnt.coordinate(2));
    end
end

  2. 通过匿名函数将animtedline对象传递给回调函数

    function startButton_Callback(~, ~, handles)
    h = animatedline;

    la = newClass;

    %// Use the callback but add h as an additional input argument
    addlistener(la, 'statusAnnouncement', @(s,e)StatusListener(s,e,h))
end

%// Note the additional input argument here
function StatusListener(obj, evnt, h)
    h.addpoints(evnt.coordinate(1), evnt.coordinate(2))
end

  3. 更新匿名函数的animatedline 内部

    function startButton_Callback(~, ~, handles)
    h = animatedline;

    la = newClass;

    %// Don't define a separate function and just do the update here
    addlistener(la, 'statusAnnouncement', @(s,e)h.addpoints(e.coordinate(1), e.coordinate(2)))
end

  4. 将animatedline对象存储在图形的guidataof中。appdata

    function startButton_Callback(~, ~, handles)

    h = animatedline;

    %// Store the handle within the appdata of the figure
    setappdata(gcbf, 'MyAnimatedLine', h)

    la = newClass;
    addlistener(la,'statusAnnouncement',@StatusListener);
end

function StatusListener(obj, evnt)
    %// Get the handle from the appdata of the figure
    h = getappdata(gcbf, 'MyAnimatedLine');
    h.addpoints(evnt.coordinate(1), evnt.coordinate(2))
end
于 2016-04-16T15:22:27.123 回答