Controller/BrowserWindowController.m

/*
     File: BrowserWindowController.m
 Abstract: Window Controller Class for CocoaSlides Browser Windows
 
  Version: 1.5
 
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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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 */
 
#import "BrowserWindowController.h"
#import "Asset.h"
#import "AssetCollection.h"
#import "AssetCollectionView.h"
 
@implementation BrowserWindowController
 
- (id)initWithPath:(NSString *)newPath {
    
    self = [super initWithWindowNibName:@"BrowserWindow"];
    if (self) {
        path = [newPath copy];
        sortKey = [@"filename" copy];
        sortsAscending = YES;
    }
    return self;
}
 
- (void)dealloc {
    
    [sortKey release];
    [assetCollection release];
    [path release];
    [super dealloc];
}
 
- (void)updateSortDescriptors {
    
    // Build a new NSSortDescriptor that we can use to order our image assets, according to the current "sortKey" and "sortsAscending" setting.
    NSString *effectiveSortKey = [[NSString alloc] initWithFormat:@"asset.%@", [self sortKey]];
    NSSortDescriptor *sortDescriptor = nil;
    if ([[self sortKey] isEqualToString:@"filename"]) {
        sortDescriptor = [[NSSortDescriptor alloc] initWithKey:effectiveSortKey ascending:[self sortsAscending] selector:@selector(caseInsensitiveCompare:)];
    } else {
        sortDescriptor = [[NSSortDescriptor alloc] initWithKey:effectiveSortKey ascending:[self sortsAscending]];
    }
 
    // Tell our AssetCollectionView to use the new sort descriptor.
    [assetCollectionView setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
    [sortDescriptor release];
    [effectiveSortKey release];
}
 
- (NSString *)sortKey {
    return sortKey;
}
 
- (void)setSortKey:(NSString *)newSortKey {
    
    if (sortKey != newSortKey) {
        id old = sortKey;
        sortKey = [newSortKey copy];
        [old release];
 
        [self updateSortDescriptors];
    }
}
 
- (BOOL)sortsAscending {
    return sortsAscending;
}
 
- (void)setSortsAscending:(BOOL)flag {
    
    if (sortsAscending != flag) {
        sortsAscending = flag;
 
        [self updateSortDescriptors];
    }
}
 
- (void)windowDidLoad {
    
    // Ask for assetCollectionView and all its descendants to be rendered and animated
    // using layers.  Note that this is the only part of this code sample that refers in
    // any way to the existence of layers. -- AppKit takes care of the implications of this
    // automatically!  Interface Builder 3.0 even allows the per-view "wantsLayer" flag to
    // be set in the .nib, which would allow removing these two lines of code.
    //
    [assetCollectionView setWantsLayer:YES];
 
    // Create an AssetCollection for browsing our assigned path.
    assetCollection = [[AssetCollection alloc] initWithRootURL:[NSURL fileURLWithPath:path]];
 
    // Set the window's title to the name of the folder we're browsing.
    [[assetCollectionView window] setTitle:[path lastPathComponent]];
 
    // Hook things up and start loading thumbnails.
    [self updateSortDescriptors];
    [assetCollectionView setAssetCollection:assetCollection];
    [assetCollection startRefresh];
}
 
- (void)windowDidBecomeKey:(NSNotification *)notification {
    // Rescan for filesystem changes each time window becomes key again.
    [assetCollection startRefresh];
}
 
- (void)refresh:(id)sender {
    // Ask our assetCollection to check for new, changed, and removed asset files.  Our assetCollectionView will be automatically notified of any changes to the assetCollection via KVO.
    [assetCollection startRefresh];
}
 
- (IBAction)showSlideshowWindow:(id)sender {
    
    [slideshowWindowController setAssetCollection:assetCollection];
    [slideshowWindowController showWindow:self];
}
 
@end