MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuel d'utilisateur télécharger pdf (Page 268)

10 Examples of GUIDE GUIs

10-44

save(File,'Addresses')

handles.LastFile = File;

guidata(hObject, handles)

end

The Create New Menu

The Create New menu simply clears the Contact Name and Contact Phone #

text fields to facilitate adding a new name and number. After making the new

entries, the user must then save the address book with the

Save or Save As

menus. This callback sets the text

String properties to empty strings:

function New_Callback(hObject, eventdata, handles)

set(handles.Contact_Name,'String','')

set(handles.Contact_Phone,'String','')

The Address Book Resize Function

The address book defines its own resize function. To use this resize function,

you must set the

Application Options dialog Resize behavior to

User-specified, which in turn sets the figure’s ResizeFcn property to:

address_book('ResizeFcn',gcbo,[],guidata(gcbo))

Whenever the user resizes the figure, MATLAB calls the ResizeFcn

subfunction in the address book M-file (

address_book.m)

Behavior of the Resize Function

The resize function allows users to make the figure wider, to accommodate

long names and numbers, but does not allow the figure to be made narrower

than its original width. Also, users cannot change the height. These

restrictions do not limit the usefulness of the GUI and simplify the

resize

function, which must maintain the proper proportions between the figure size

and the components in the GUI.

When the user resizes the figure and releases the mouse, the resize function

executes. At that point, the resized figure’s dimensions are saved. The

following sections describe how the

resize function handles the various

possibilities.

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Manuel d'utilisateur Page 268