gistfile1.m

@implementation LEToolbar : CPView
{
   CPView _toolbarPart;
   CPView _stackPart;

   LEAnimation _toolbarOpenAnimation;
   LEAnimation _toolbarCloseAnimation;
   LEAnimation _stackOpenAnimation;
   LEAnimation _stackCloseAnimation;
}

- (void)openToolbar:(int)width
{
    if(!_toolbarOpenAnimation)
    {
        _toolbarOpenAnimation = [[LEPropertyAnimation alloc] initWithView:self property:@"width"];
        [_toolbarOpenAnimation setStart:[CPNumber numberWithInt:85]];
        [_toolbarOpenAnimation setDuration:0.6];
        [_toolbarOpenAnimation setAnimationCurve:CPAnimationEaseInOut];
    }
    
    [_toolbarOpenAnimation setEnd:[CPNumber numberWithInt:width]];
    [_toolbarOpenAnimation startAnimation];
}

- (void)closeToolbar:(int)width
{
    if(!_toolbarCloseAnimation)
    {
        _toolbarCloseAnimation = [[LEPropertyAnimation alloc] initWithView:self property:@"width"];
        [_toolbarCloseAnimation setEnd:[CPNumber numberWithInt:85]];
        [_toolbarCloseAnimation setDuration:0.6];
        [_toolbarCloseAnimation setAnimationCurve:CPAnimationEaseInOut];
    }
    
    [_toolbarCloseAnimation setStart:[CPNumber numberWithInt:width]];
    [_toolbarCloseAnimation startAnimation];
}

- (void)openStack:(int)height
{
    if(!_stackOpenAnimation)
    {
        _stackOpenAnimation = [[LEPropertyAnimation alloc] initWithView:self property:@"height"];
        [_stackOpenAnimation setStart:[CPNumber numberWithInt:230]];
        [_stackOpenAnimation setDuration:0.6];
        [_stackOpenAnimation setAnimationCurve:CPAnimationEaseInOut];
    }
    
    [_stackOpenAnimation setEnd:[CPNumber numberWithInt:height]];
    [_stackOpenAnimation startAnimation];
}

- (void)closeStack:(int)height
{
    if(!_stackCloseAnimation)
    {
        _stackCloseAnimation = [[LEPropertyAnimation alloc] initWithView:self property:@"height"];
        [_stackCloseAnimation setEnd:[CPNumber numberWithInt:230]];
        [_stackCloseAnimation setDuration:0.6];
        [_stackCloseAnimation setAnimationCurve:CPAnimationEaseInOut];
    }
    
    [_stackCloseAnimation setStart:[CPNumber numberWithInt:height]];
    [_stackCloseAnimation startAnimation];
}

- (int)width
{
    return CGRectGetWidth([_toolbarPart frame]);
}

- (void)setWidth:(int)width
{
    [_toolbarPart setFrameSize:CGSizeMake(width,CGRectGetHeight([_toolbarPart frame]))];
}

- (int)height
{
    return CGRectGetHeight([_stackPart frame]);
}

- (void)setHeight:(int)height
{
    [_stackPart setFrameSize:CGSizeMake(CGRectGetWidth([_stackPart frame]),height)];
}

@end

gistfile2.m

//Calling the animations:

- (void)openToolbar:(id)sender
{
    
    [[LEToolbar defaultToolbar] openStack:800];
    [[LEToolbar defaultToolbar] openToolbar:500];
}

gistfile3.m

@implementation LEPropertyAnimation : CPAnimation
{
	CPView _view;
	CPString _getPath;
	CPString _setPath;
	
	CPValue _start;
	CPValue _end;
}

- (LEAnimation)initWithView:(CPView)aView property:(NSString)keyPath
{
	self = [super initWithDuration:1.0 animationCurve:CPAnimationLinear];
	if(self)
	{
		if([aView respondsToSelector:keyPath]){
			_view = aView;
			_keyPath = keyPath;
		} else {
			return null;
		}
	}
	
	return self;
}

- (void)setCurrentProgress:(float)progress
{
	[super setCurrentProgress:progress];
	
	if(_keyPath == 'width' || _keyPath == 'height')
        progress = (progress * ([_end intValue] - [_start intValue])) + [_start intValue];
	[_view setValue:progress forKey:_keyPath];
}

- (void)setStart:(id)aValue
{
	_start = aValue;
}

- (id)start
{
	return _start;
}

- (void)setEnd:(id)aValue
{
	_end = aValue;
}

- (id)end
{
	return _end;
}

@end