AboutBox.m

/*
 UnRarX, Mac OS X GUI for rar and par file extraction.
 Copyright © 2003  Peter Noriega

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 RAR and unRAR are copyright Eugene Roshal.

 THE UNRAR UTILITY ARE DISTRIBUTED "AS IS".  NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.  YOU USE AT YOUR OWN RISK.  THE AUTHORS WILL NOT BE LIABLE FOR DATA LOSS, DAMAGES, LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING OR MISUSING THIS SOFTWARE.

 Thanks for using UnRarX for Mac OS X.
 ________________________________________
 */

#import "AboutBox.h"

@implementation AboutBox


static AboutBox *sharedInstance = nil;
+ (AboutBox *)sharedInstance
{
    return sharedInstance ? sharedInstance : [[self alloc] init];
}

- (id)init
{
    if (sharedInstance) {
        [self dealloc];
    } else {
        sharedInstance = [super init];
    }
        return sharedInstance;
}

    - (IBAction)showPanel:(id)sender
{
    if (!appNameField)
    {
        NSWindow *theWindow;
        NSString *creditsPath;
        NSAttributedString *creditsString;
        NSString *appName;
        NSString *versionString;
        NSString *copyrightString;
        NSDictionary *infoDictionary;
        CFBundleRef localInfoBundle;
        NSDictionary *localInfoDict;
        if (![NSBundle loadNibNamed:@"AboutBox" owner:self])
        {
            // int NSRunCriticalAlertPanel(NSString *title,
            //NSString *msg, NSString *defaultButton,
            //NSString *alternateButton, NSString *otherButton, ...);
            //NSLog( @"Failed to load AboutBox.nib" );
            NSBeep();
            return;
        }
        theWindow = [appNameField window];
        // Get the info dictionary (Info.plist)
        infoDictionary = [[NSBundle mainBundle] infoDictionary];

        // Get the localized info dictionary (InfoPlist.strings)
        localInfoBundle = CFBundleGetMainBundle();
        localInfoDict = (NSDictionary *)
            CFBundleGetLocalInfoDictionary( localInfoBundle );

        // Setup the app name field
        appName = [localInfoDict objectForKey:@"CFBundleName"];
        [appNameField setStringValue:appName];
        // Set the about box window title
        [theWindow setTitle:[NSString stringWithFormat:@"About %@", appName]];
        // Setup the version field
        versionString = [infoDictionary objectForKey:@"CFBundleVersion"];
        [versionField setStringValue:[NSString stringWithFormat:@"Version %@",
            versionString]];
        // Setup our credits
        creditsPath = [[NSBundle mainBundle] pathForResource:@"Credits"
                                                      ofType:@"rtf"];
        creditsString = [[NSAttributedString alloc] initWithPath:creditsPath
                                                documentAttributes:nil];
        [creditsField replaceCharactersInRange:NSMakeRange( 0, 0 )
                                        withRTF:[creditsString RTFFromRange:
                                            NSMakeRange( 0, [creditsString length] )
                                                        documentAttributes:nil]];
        // Setup the copyright field
        copyrightString = [localInfoDict objectForKey:@"NSHumanReadableCopyright"];
        [copyrightField setStringValue:copyrightString];
        // Prepare some scroll info
        maxScrollHeight = [[creditsField string] length];
        // Setup the window
        [theWindow setExcludedFromWindowsMenu:YES];
        [theWindow setMenu:nil];
        [theWindow center];
        }
        if (![[appNameField window] isVisible])
        {
            currentPosition = 0;
            restartAtTop = NO;
            startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
            [creditsField scrollPoint:NSMakePoint( 0, 0 )];
        }
            // Show the window
        [[appNameField window] makeKeyAndOrderFront:nil];
}

/*- (void)windowDidBecomeKey:(NSNotification *)notification
{
    scrollTimer = [NSTimer scheduledTimerWithTimeInterval:3/4
                                                   target:self
                                                 selector:@selector(scrollCredits:)
                                                 userInfo:nil
                                                  repeats:YES];
}*/

- (void)windowDidResignKey:(NSNotification *)notification
{
    [scrollTimer invalidate];
}

- (void)scrollCredits:(NSTimer *)timer
{
    if ([NSDate timeIntervalSinceReferenceDate] >= startTime)
    {
        if (restartAtTop)
        {
            // Reset the startTime
            startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
            restartAtTop = NO;
                        // Set the position
            [creditsField scrollPoint:NSMakePoint( 0, 0 )];
                        return;
        }
        if (currentPosition >= maxScrollHeight)
        {
            // Reset the startTime
            startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
                        // Reset the position
            currentPosition = 0;
            restartAtTop = YES;
        }
        else
        {
            // Scroll to the position
            [creditsField scrollPoint:NSMakePoint( 0, currentPosition )];
                        // Increment the scroll position
            currentPosition += 0.01;
        }
    }
}

@end