зеркало из https://github.com/mozilla/gecko-dev.git
125 строки
3.9 KiB
Objective-C
125 строки
3.9 KiB
Objective-C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Mozilla browser.
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*
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* The Initial Developer of the Original Code is Matt Judy.
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*
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* Contributor(s):
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* Matt Judy (Original Author)
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* David Hyatt <hyatt@netscape.com>
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*/
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#import "CHAboutBox.h"
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@implementation CHAboutBox
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static CHAboutBox *sharedInstance = nil;
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+ (CHAboutBox *)sharedInstance
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{
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return sharedInstance ? sharedInstance : [[self alloc] init];
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}
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- (id)init
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{
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if (sharedInstance) {
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[self dealloc];
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} else {
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sharedInstance = [super init];
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}
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return sharedInstance;
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}
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- (IBAction)showPanel:(id)sender
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{
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if (!creditsField) {
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NSString *creditsPath;
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NSAttributedString *creditsString;
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float fieldHeight;
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float containerHeight;
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if (![NSBundle loadNibNamed:@"AboutBox" owner:self]) {
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NSLog( @"Failed to load AboutBox.nib" );
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NSBeep();
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return;
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}
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[window setTitle:@"About Navigator"];
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creditsPath = [[NSBundle mainBundle] pathForResource:@"Credits" ofType:@"rtf"];
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creditsString = [[NSAttributedString alloc] initWithPath:creditsPath documentAttributes:nil];
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[creditsField replaceCharactersInRange:NSMakeRange( 0, 0 )
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withRTF:[creditsString RTFFromRange:
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NSMakeRange( 0, [creditsString length] )
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documentAttributes:nil]];
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fieldHeight = [creditsField frame].size.height;
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(void)[[creditsField layoutManager] glyphRangeForTextContainer:[creditsField textContainer]];
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containerHeight = [[creditsField layoutManager] usedRectForTextContainer:
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[creditsField textContainer]].size.height;
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maxScrollHeight = containerHeight - fieldHeight;
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[window setExcludedFromWindowsMenu:YES];
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[window setMenu:nil];
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[window center];
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}
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if (![window isVisible]) {
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currentPosition = 0;
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restartAtTop = NO;
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startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
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[creditsField scrollPoint:NSMakePoint( 0, 0 )];
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}
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[window makeKeyAndOrderFront:nil];
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}
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- (void)windowDidBecomeKey:(NSNotification *)notification
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{
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scrollTimer = [NSTimer scheduledTimerWithTimeInterval:1/4
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target:self
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selector:@selector(scrollCredits:)
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userInfo:nil
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repeats:YES];
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}
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- (void)windowDidResignKey:(NSNotification *)notification
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{
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[scrollTimer invalidate];
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}
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- (void)scrollCredits:(NSTimer *)timer
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{
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if ([NSDate timeIntervalSinceReferenceDate] >= startTime) {
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if (restartAtTop) {
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startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
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restartAtTop = NO;
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[creditsField scrollPoint:NSMakePoint( 0, 0 )];
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return;
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}
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if (currentPosition >= maxScrollHeight) {
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startTime = [NSDate timeIntervalSinceReferenceDate] + 3.0;
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currentPosition = 0;
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restartAtTop = YES;
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} else {
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[creditsField scrollPoint:NSMakePoint( 0, currentPosition )];
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currentPosition += 0.01;
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}
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}
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}
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@end
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