Adding an NSProgressIndicator to the dock icon

Question

I\'m creating an application which should show a progress bar in the dock icon. Currently I have this, but it\'s not working:

  NSProgressIndicator *progressIndi         


        

Answer 1

In the finish I had to use the following code as the contentView was null:

    docTile = [[NSApplication sharedApplication] dockTile];
    NSImageView *iv = [[NSImageView alloc] init];
    [iv setImage:[[NSApplication sharedApplication] applicationIconImage]];
    [docTile setContentView:iv];

    progressIndicator = [[NSProgressIndicator alloc]
                                              initWithFrame:NSMakeRect(0.0f, 0.0f, docTile.size.width, 10.)];
    [progressIndicator setStyle:NSProgressIndicatorBarStyle];
    [progressIndicator setIndeterminate:NO];
    [iv addSubview:progressIndicator];

    [progressIndicator setBezeled:YES];
    [progressIndicator setMinValue:0];
    [progressIndicator setMaxValue:1];
    [progressIndicator release];

    [self setProgress:[NSNumber numberWithFloat:-1]];
}

- (void)setProgress:(NSNumber *)fraction {
    if ( [fraction doubleValue] >= 0 ) {
        [progressIndicator setDoubleValue:[fraction doubleValue]];
        [progressIndicator setHidden:NO];
    }
    else
        [progressIndicator setHidden:YES];
    [docTile display];
}