C H A P T E R 1 5

Controls

The stepper control is available in Interface Builder. To create one using Application Kit programming interfaces, use the NSStepper class.

Stepper Control Specifications

Control sizes: Stepper controls are available in regular, small, and mini sizes. The dimensions of the stepper control are fixed for each size.

Controlspacing: Use the following recommended spacing between the stepper and the text field it modifies:

■Regular size: 2 pixels.

■Small: 2 pixels.

■Mini: 1 pixel.

Figure 15-53 A regular-size stepper control

Placards

A placard is a small control at the bottom of a window used to display information, such as the current page number or the current magnification level.

Typically, placards are used in document windows as a way to quickly modify the view of the contents—for example, to change the current page or the magnification. The most familiar use of the placard is as a pop-up menu placed at the bottom of a window, to the left of the horizontal scroll bar, as shown in Figure 15-54.

Figure 15-54 A placard

If you need to offer a menu of commands that affect the contents of the window in ways other than magnification or number of pages per view, don’t add the commands to the placard’s menu. Instead, you should use an Action menu (see “Action Menus” (page 284) for more information on Action menus).

Placards are not available in Interface Builder. To create one using Application Kit programming interfaces, subclass NSScrollView (for an example of how to do this, see the Sketch sample code located in /Developer/Examples/AppKit when the Developer package is installed). A placard is 15 pixels high and text on it should be in either the small system font or the label font.

Selection Controls

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