MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Bedienungsanleitung PDF herunterladen (Seite 135)

Setting Tab Order

6-45

Setting Tab Order

A GUI’s tab order is the order in which components of the GUI are selected

when a user presses the

Tab key on the keyboard.

MATLAB figures maintain separate stacks that control tabbing for different

kinds of components:

• User interface controls such as buttons, sliders, and pop-up menus

• Panels, button groups (axes are in the same stack but cannot be tabbed)

• ActiveX controls (cannot be tabbed)

You can control the tab order of components only if those components are in the

same stack.

The tab order for each level is determined independently. The figure is the base

level, and each panel or button group establishes its own level. If, in tabbing

through the components at the figure level, a user tabs to a panel or button

group, then subsequent tabs sequence through the components of the panel or

button group before returning to the level from which the panel or button group

was reached.

When you create a GUI, GUIDE sets the tab order at each level to be the order

in which you add components to that level in the Layout Editor. This may not

be the best order for the user.

Note The tab order also affects the stacking order of components. If

components overlap, those that appear lower in the tabbing order, are drawn

on top of those that appear higher in the order. See “Front-to-Back

Positioning” on page 6-33 for more information.

The figure in the following GUI contains an axes, a slider, a panel, a static text,

and a pop-up menu. Of these, only the slider, the panel, and the pop-up menu

at the figure level can be tabbed. The panel contains three push buttons, which

can all be tabbed.

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Bedienungsanleitung Seite 135