使用事件侦听器和 MATLAB GUI 查看 Simulink 信号研究

% Create a panel for operations that can be performed
    hop = uipanel('Parent',hf,...
        'Units','normalized',...
        'Position',[0.02 0.1 0.21 0.27],...
        'Title','Operations',...
        'BackgroundColor',get(hf,'Color'),...
        'HandleVisibility','callback',...
        'Tag','tunePanel');
    strings = {'Build','Start','Stop'};
    positions = [0.7 0.45 0.2];
    tags = {'buildpb','startpb','stoppb'};
    callbacks = {@localBuildPressed, @localStartPressed, @localStopPressed};
    enabled ={'off','on','off'};
    for idx = 1:length(strings)
        uicontrol('Parent',hop,...
            'Style','pushbutton',...
            'Units','normalized',...
            'Position',[0.15 positions(idx) 0.7 0.2],...
            'BackgroundColor',get(hf,'Color'),...
            'String',strings{idx},...
            'Enable',enabled{idx},...
            'Callback',callbacks{idx},...
            'HandleVisibility','callback',...
            'Tag',tags{idx});
    end
    % Create some application data storing the UI handles and various
    % pieces of information about the model's original state.
    % Can only do the following if a Simulink License is available
    simulinkLicenceAvailable = license('test','Simulink');
    if simulinkLicenceAvailable
        try
            % Load the simulink model
            ad = localLoadModel(modelName);
            % The gain value needs to be poked into the UI
            set(hte,'String',ad.gainValue);
            % Put an empty line on the axes for each signal that will be
            % monitored
            % Save the line handles, which will be useful to have in an
            % array during the graphics updating routine.
            nlines = length(ad.viewing);
            hl = nan(1,nlines);
            colourOrder = get(ha,'ColorOrder');
            for idx = 1:nlines
                hl(idx) = line('Parent',ha,...
                    'XData',[],...
                    'YData',[],...
                    'Color',colourOrder(mod(idx-1,size(colourOrder,1))+1,:),...
                    'EraseMode','xor',...
                    'Tag',sprintf('signalLine%d',idx));
            end
            ad.lineHandles = hl;
        catch ME %#ok
            simulinkLicenceAvailable = false;
        end
    end
    if ~simulinkLicenceAvailable
        % If no Simulink license available then disable all UI controls
        % Not all uicomponents (e.g. figure, axes,...) have an Enable
        % property so do this in a loop.  The loop catches those widgets
        % without an Enable property and does nothing for them.
        allHandles = findall(hf);
        arrayfun(@(h)set(h,'Enable','off'),allHandles,...
            'ErrorHandler',@(obj,evt)disp(''));
        % For the UI to be closed there needs to be a modelName field in
        % appdata so just create a dummy one
        ad.modelName = modelName;
        % Also pop-up a dialog telling the user what's happening
        str = sprintf('%s\n%s\n%s\n%s',...
            'A Simulink license isn''t available, or cannot be',...
            'checked out.  The UI is being rendered however all ',...
            'functionality is being disabled.  Check for an available',...
            'license then try again.');
        hedlg = errordlg(str,'Simulink License Error','modal');
        uiwait(hedlg);
    end