/*

    Copyright (C) 2015 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    This is the application delegate implementation.

*/

#import "AAPLAppDelegate.h"

#import "AAPLBrowserWindowController.h"

@implementation AAPLAppDelegate

/*

    Given a file:// URL that points to a folder, opens a new browser window that

    displays the image files in that folder.

*/

- (void)openBrowserWindowForFolderURL:(NSURL *)folderURL {

    AAPLBrowserWindowController *browserWindowController = [[AAPLBrowserWindowController alloc] initWithRootURL:folderURL];

    if (browserWindowController) {

        [browserWindowController showWindow:self];

        /*

            Add browserWindowController to browserWindowControllers, to keep it

            alive.

        */

        if (browserWindowControllers == nil) {

            browserWindowControllers = [[NSMutableSet alloc] init];

        }

        [browserWindowControllers addObject:browserWindowController];

        /*

            Watch for the window to be closed, so we can let it and its

            controller go.

        */

        NSWindow *browserWindow = [browserWindowController window];

        if (browserWindow) {

            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(browserWindowWillClose:) name:NSWindowWillCloseNotification object:browserWindow];

        }

    }

}

/*

    Action method invoked by the "File" -> "Open Browser..." menu command.

    Prompts the user to choose a folder, using a standard Open panel, then opens

    a browser window for that folder using the method above.

*/

- (IBAction)openBrowserWindow:(id)sender {

    NSOpenPanel *openPanel = [NSOpenPanel openPanel];

    openPanel.prompt = @"Choose";

    openPanel.message = @"Choose a directory containing images:";

    openPanel.title = @"Choose Directory";

    openPanel.canChooseDirectories = YES;

    openPanel.canChooseFiles = NO;

    NSArray *pictureDirectories = NSSearchPathForDirectoriesInDomains(NSPicturesDirectory, NSUserDomainMask, YES);

    openPanel.directoryURL = [NSURL fileURLWithPath:pictureDirectories[0]];

    [openPanel beginWithCompletionHandler:^(NSInteger result) {

        if (result == NSModalResponseOK) {

            [self openBrowserWindowForFolderURL:openPanel.URLs[0]];

        }

    }];

}

// When a browser window is closed, release its BrowserWindowController.

- (void)browserWindowWillClose:(NSNotification *)notification {

    NSWindow *browserWindow = (NSWindow *)(notification.object);

    [browserWindowControllers removeObject:browserWindow.delegate];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowWillCloseNotification object:browserWindow];

}

#pragma mark NSApplicationDelegate Methods

// Browse a default folder on launch.

- (void)applicationDidFinishLaunching:(NSNotification *)notification {

    [self openBrowserWindowForFolderURL:[NSURL fileURLWithPath:@"/Library/Desktop Pictures"]];

}

@end