Exception-like behavior in save panel used for file choose
Exception-like behavior in save panel used for file choose
- Subject: Exception-like behavior in save panel used for file choose
- From: Barry Press <email@hidden>
- Date: Fri, 31 Jul 2009 00:04:43 -0600
I've written a small app that, from a preferences panel, uses a
"Choose" button to open a save panel that's used to select the name of
the file to which the app will log periodic data. That is, the
preferences panel launches via this code:
// --------------------------------------------------------
showPreferencesPanel
- (IBAction)showPreferencesPanel: (id)sender
{
SettingsDialog *settingsMgr;
settingsMgr = [[SettingsDialog alloc] init];
[settingsMgr showSettingsPanel:self];
}
and from within the code for the settingsMgr, a button push invokes
this code to get the file name:
//--------------------------------------------------------
pushChooseButton ----
- (IBAction)pushChooseButton:(id)sender
{
// get pathname
// break into components
// if pathname is a file
// drop last one, make path from it
NSSavePanel *save = [NSSavePanel savePanel];
[save setAllowedFileTypes:[[NSArray alloc] initWithObjects:@"log",
@"txt", nil]];
[save setAllowsOtherFileTypes:YES];
[save setRequiredFileType:@"log"];
[save setMessage:@"Pick the file to which log messages will be
appended.\nFiles with the .log file type will open in console by
default."];
[save setNameFieldLabel:@"Log To:"];
[save setPrompt:@"Choose"];
[save setDelegate:self];
[save setTitle:@"Log"];
NSString *sFile = [textLogPath stringValue];; //
stringByStandardizingPath;
NSString *sFileWithoutLast = [sFile stringByDeletingLastPathComponent];
NSString *sFileOnly = [sFile substringFromIndex:[sFileWithoutLast
length]+1];
//NSLog(@"\nsFile: %@\nwithout last:%@\nLast: %@", sFile,
sFileWithoutLast, sFileOnly );
int result = [save runModalForDirectory:sFileWithoutLast
file:sFileOnly];
if (result == NSOKButton){
NSString *selectedFile = [[save filename] stringByStandardizingPath];
[textLogPath setStringValue:selectedFile];
}
}
This latter code works properly so long as the file that will be the
target of the append -- the target of the save panel -- does not
exist. In that event, the runModal comes back and I can extract the
name. If the file *does* exist, however, then a panel comes up that
asks if it's ok to replace the file, and if I agree to replace, not
only the choose panel closes, so does my settings panel - I'm dumped
all the way back to the app that invoked showPreferencePane.
I looked at the methods being fired, and nothing much interesting
comes up. I see
panel:directoryDidChange:
panel:userEnteredFilename:confirmed:
panel:isValidFilename:
and by then the windows are all closed. Any ideas on why the panel
closes around me?
(Side note: anyone who wants to critique my code for splitting a file
name off a path, please let her rip!)
Thanks
Barry Press
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