April 2004
Intermediate to advanced
480 pages
8h 29m
English
Content preview from COCOA PROGRAMMING FOR MAC OS X SECOND EDITIONBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 22. Sheets
A sheet is simply an instance of NSWindow that is attached to another window. The sheet comes down over the window, and the window stops getting events until the sheet is dismissed. Typically, you will compose a sheet as an off-screen window in your nib file.
NSApplication has several methods that make sheets possible:
// Start a sheet - (void)beginSheet:(NSWindow *)sheet modalForWindow:(NSWindow *)docWindow modalDelegate:(id)modalDelegate didEndSelector:(SEL)didEndSelector contextInfo:(void *)contextInfo; // End the sheet - (void)endSheet:(NSWindow *)sheet returnCode:(int)returnCode;
Besides the sheet window and the window to which it is attached, you supply a modal delegate, a selector, and a pointer when you start the sheet. ...
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