Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 4 - Window Manager / Window Manager Reference

Window Manager Routines / Maintaining the Update Region

EndUpdate

Use the EndUpdate procedure to finish updating a window.

PROCEDURE EndUpdate (theWindow: WindowPtr);

theWindow

A pointer to the window's window record.

DESCRIPTION

The EndUpdate procedure restores the normal visible region of a window's graphics port. When you receive an update event for a window, you call BeginUpdate, redraw the update region, and then call EndUpdate. Each call to BeginUpdate must be balanced by a subsequent call to EndUpdate.

SEE ALSO

See Figure 4-21 on page 4-49 for an illustration of how BeginUpdate and EndUpdate affect the visible region and update region. See Listing 4-10 on page 4-50 for an example that updates a window.

Main | Top of Section | What's New | Apple Computer, Inc. | Find It | Feedback | Help