MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Instrukcja Użytkownika Pobierz pdf (Strona 320)

12 Examples of GUIs Created Programmatically

12-42

% different platforms

prepareLayout(hMainFigure);

prepareLayout

first uses findall to retrieve the handles of all objects

contained in the figure. The list of retrieved handles includes the

colorPalette, which is embedded in the iconEditor, and its children. The

figure’s handle is passed to

prepareLayout as the input argument

topContainer.

allObjects = findall(topContainer);

prepareLayout then sets the HandleVisibility properties of all those objects

that have one to

Callback.

% Make GUI objects available to callbacks so that they cannot

% be changed accidentally by other MATLAB commands

set(allObjects(isprop(allObjects,'HandleVisibility')),...

'HandleVisibility','Callback');

Setting HandleVisibility to Callback causes the GUI handles to be visible

from within callback routines or functions invoked by callback routines, but not

from within functions invoked from the command line. This ensures that

command-line users cannot inadvertently alter the GUI when it is the current

figure.

Running a GUI on Multiple Platforms

The prepareLayout utility function sets various properties of all the GUI

components to enable the GUI to retain the correct look and feel on multiple

platforms. The iconEditor calls

prepareLayout with the handle of the main

figure, in the initialization section of the M-file.

% Make changes needed for proper look and feel and running on

% different platforms

prepareLayout(hMainFigure);

First, prepareLayout uses findall to retrieve the handles of all objects

contained in the figure. The list of retrieved handles also includes the

colorPalette, which is embedded in the iconEditor, and its children. The

figure’s handle is passed to

findall as the input argument topContainer.

function prepareLayout(topContainer)

...

allObjects = findall(topContainer);

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Instrukcja Użytkownika Strona 320