Graham,
Still pouring over your thesis .. in process, so let me ask just one thing
at a time, rather than chew here on the whole thing.
(1) learning about anonymous type = (id) .. I make this call within FC:
[iboCalculateSheetCtrl showSheetOnParentWindow:itsWindow
withDescription:nil
delegate:self
contextInfo:sCalculateSheetID];
The delegate here is FileController*, where the delegate received within
SC's showSheetOnParentWindow looks like:
- (void) showSheetOnParentWindow:(NSWindow*)parentWindow
withDescription:(NSString*)theDescription
delegate:(id)theTarget
contextInfo:(void*)contextInfo {
mFileSheetDelegate = theTarget;
// etc.
}
and at the very top:
@implementation CalculateSheetController
id *mFileSheetDelegate;
Within the implementation of showSheetOnParentWindow, I get "assignment from
incompatible pointer type" with:
mFileSheetDelegate = theTarget;
and later on within this SC's implementation:
- (void) sheetDidEnd:(NSWindow*)sheet
returnCode:(int)returnCode
contextInfo:(void*)contextInfo {
[mFileSheetDelegate doSheetSelection:sheet returnCode:returnCode
contextInfo:contextInfo];
}
I get: "warning:invalid receiver type 'id'" and
"no matching doSheetSelection:returnCode:contextInfo".
Based on the "invalid .." warning, I understand "no matching ..".
By the way my FC has the formal doSheetSelection:returnCode:contextInfo
selector or method .. one final thing on this item, I do not really
understand "informal protocols", so I have not yet tried to implement such.
John
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