MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Dokumentacja Pobierz pdf (Strona 192)

5 GUI Applications

5-26

end

set(handles.ResultsList,'String',ResultsStr);

% Store the new ResultsData

handles.ResultsData = ResultsData;

guidata(hObject, handles)

Removing Results from the List Box

The GUI 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 a user clicks on the Remove button, the callback

executes the following steps:

• Determines which list box items are selected when a user clicks on the

Remove button and removes these 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 sting 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));

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