NSOpenPanel Performance the Second Time
NSOpenPanel Performance the Second Time
- Subject: NSOpenPanel Performance the Second Time
- From: Thomas Wetmore <email@hidden>
- Date: Thu, 08 Oct 2009 02:01:52 -0400
I use the following function to show an open panel and get the path to
a file. I have inserted three NSLog calls.
This first time I call this function the panel opens immediately and
the three log messages follow each other immediately.
The second and every later time I call this function, performance is
terrible -- there is about two or three seconds between the first two
log messages though the third follows immediately after the second.
The evidence is that [NSOpenPanel openPanel] is the culprit. Is there
something I need to do (i.e., close) to the open panel before I return
from this function? I tried making the openPanel static and only
creating it once, but this caused a crash.
Thanks very much for any advice.
Tom Wetmore
// Use a NSOpenPanel to choose the name of a Gedcom file to read.
//----------------------------------------------------------------------------------------------------------------------
NSString* openFile (NSString* title)
{
NSLog(@"openFile called"); // TODO: Remove.
NSOpenPanel* oPanel = [NSOpenPanel openPanel]; <<<<<-------
PERFORMANCE SUFFERS HERE---------<<<<
NSLog(@"back from openening panel"); // TODO: Remove.
[oPanel setCanChooseDirectories: NO];
[oPanel setCanChooseFiles: YES];
[oPanel setCanCreateDirectories: NO];
[oPanel setAllowsMultipleSelection: NO];
[oPanel setAlphaValue: 0.99];
[oPanel setTitle: title];
NSArray* fileTypes = [NSArray arrayWithObjects: @"txt", @"ged",
@"gedcom", nil];
[oPanel setAllowedFileTypes: fileTypes];
NSLog(@"about to runModal"); // TODO: Remove
if ([oPanel runModal] != NSOKButton) return @"";
// Return the file name.
NSArray* files = [oPanel filenames];
if ([files count] == 0) return @"";
NSString* filePath = [files objectAtIndex:0];
return filePath;
}
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