- validateVisibleItems Called on window updates to validate the visible items.
actionThe receiver’s action.
targetThe receiver’s target.
- validateThis method is called by the receiver’s toolbar during validation.
Discussion 解説
NSToolbar only calls this method for image items.
If the receiver is the target for the actions of multiple toolbar items, it’s necessary to determine which toolbar item the refers to by testing the item.
-(BOOL)validateToolbarItem:(NSToolbarItem *)toolbarItem
{
BOOL enable = NO;
if ([[toolbarItem itemIdentifier] isEqual:SaveDocToolbarItemIdentifier]) {
// We will return YES (enable the save item)
// only when the document is dirty and needs saving
enable = [self isDocumentEdited];
} else if ([[toolbarItem itemIdentifier] isEqual:NSToolbarPrintItemIdentifier]) {
// always enable print for this window
enable = YES;
}
return enable;
}