/** $Id: domTT_drag.js 794 2003-09-17 16:53:36Z jrust $ */
var domTT_dragStickyTips = true;
var domTT_currentDragTarget;
var domTT_dragMouseDown;
var domTT_dragOffsetLeft;
var domTT_dragOffsetTop;
// {{{ domTT_dragStart()

function domTT_dragStart(in_this, in_event)
{
	if (typeof(in_event) == 'undefined')
	{
		in_event = event;
	}

	var eventButton = in_event[domLib_eventButton];
	if (eventButton != 1 && !domLib_isKonq)
	{
		return;
	}

	domTT_currentDragTarget = in_this;
	in_this.style.cursor = 'move';

	// upgrade our z-index
	in_this.style.zIndex = ++domLib_zIndex;

	var eventPosition = domLib_getEventPosition(in_event);

	var targetPosition = domLib_getOffsets(in_this);
	domTT_dragOffsetLeft = eventPosition.get('x') - targetPosition.get('left');
	domTT_dragOffsetTop = eventPosition.get('y') - targetPosition.get('top');
	domTT_dragMouseDown = true;
}

// }}}
// {{{ domTT_dragUpdate()

function domTT_dragUpdate(in_event)
{
	if (domTT_dragMouseDown)
	{
		if (domLib_isGecko)
		{
			window.getSelection().removeAllRanges()
		}

		if (domTT_useGlobalMousePosition)
		{
			var eventPosition = domTT_mousePosition;
		}
		else
		{
			if (typeof(in_event) == 'undefined')
			{
				in_event = event;
			}

			var eventPosition = domLib_getEventPosition(in_event);
		}

		domTT_currentDragTarget.style.left = (eventPosition.get('x') - domTT_dragOffsetLeft) + 'px';
		domTT_currentDragTarget.style.top = (eventPosition.get('y') - domTT_dragOffsetTop) + 'px';

		// update the collision detection
		domLib_detectCollisions(domTT_currentDragTarget);
	}
}

// }}}
// {{{ domTT_dragStop()

function domTT_dragStop()
{
	if (domTT_dragMouseDown) {
		domTT_dragMouseDown = false; 
		domTT_currentDragTarget.style.cursor = 'default';
		domTT_currentDragTarget = null;
		if (domLib_isGecko)
		{
			window.getSelection().removeAllRanges()
		}
	}
}

// }}}