MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Uživatelský manuál stáhnout pdf (Strana 310)

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101

9 Examples of GUIDE UIs

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% Store the new ResultsData

handles.ResultsData = ResultsData;

guidata(hObject, handles)

Remove Results from List Box

The Remove button callback deletes any selected item from the Resultslist list box. It

also deletes the corresponding run data from the handles structure. When you click the

Remove button, the callback performs these tasks:

• Determines which list box items are selected when you click the Remove button and

remove those items from the list box String property by setting each item to the

empty matrix [].

• Removes the deleted data from the handles structure.

• Displays the string <empty> and disables the Remove and Plot buttons (using the

Enable property), if all the items in the list box are removed.

• Save the changes to the handles structure (guidata).

Here is the Remove button callback:

function RemoveButton_Callback(hObject, eventdata, handles)

currentVal = get(handles.ResultsList,'Value');

resultsStr = get(handles.ResultsList,'String');

numResults = size(resultsStr,1);

% Remove the data and list entry for the selected value

resultsStr(currentVal) =[];

handles.ResultsData(currentVal)=[];

% If there are no other entries, disable the Remove and Plot

button

% and change the list string to <empty>

if isequal(numResults,length(currentVal)),

resultsStr = {'<empty>'};

currentVal = 1;

set([handles.RemoveButton,handles.PlotButton],'Enable','off')

end

% Ensure that list box Value is valid, then reset Value and String

currentVal = min(currentVal,size(resultsStr,1));

set(handles.ResultsList,'Value',currentVal,'String',resultsStr)

% Store the new ResultsData

guidata(hObject, handles)

Plot Results Data

The Plot button callback creates a plot of the run data and adds a legend. The data to

plot is passed to the callback in the handles structure, which also contains the gain

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