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/* Copyright (c) 2005 Tim Taylor Consulting (see LICENSE.txt) */
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ToolMan._dragsortFactory = {
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makeSortable : function(item) {
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var group = ToolMan.drag().createSimpleGroup(item)
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group.register('dragstart', this._onDragStart)
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group.register('dragmove', this._onDragMove)
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group.register('dragend', this._onDragEnd)
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return group
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},
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/**
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* Iterates over a list's items, making them sortable, applying
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* optional functions to each item.
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*
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* example: makeListSortable(myList, myFunc1, myFunc2, ... , myFuncN)
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*/
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makeListSortable : function(list) {
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var helpers = ToolMan.helpers()
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var coordinates = ToolMan.coordinates()
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var items = list.getElementsByTagName("li")
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helpers.map(items, function(item) {
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var dragGroup = dragsort.makeSortable(item)
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dragGroup.setThreshold(4)
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var min, max
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dragGroup.addTransform(function(coordinate, dragEvent) {
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return coordinate.constrainTo(min, max)
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})
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dragGroup.register('dragstart', function() {
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var items = list.getElementsByTagName("li")
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min = max = coordinates.topLeftOffset(items[0])
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for (var i = 1, n = items.length; i < n; i++) {
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var offset = coordinates.topLeftOffset(items[i])
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min = min.min(offset)
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max = max.max(offset)
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}
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})
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})
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for (var i = 1, n = arguments.length; i < n; i++)
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helpers.map(items, arguments[i])
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},
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_onDragStart : function(dragEvent) {
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},
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_onDragMove : function(dragEvent) {
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var helpers = ToolMan.helpers()
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var coordinates = ToolMan.coordinates()
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var item = dragEvent.group.element
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var xmouse = dragEvent.transformedMouseOffset
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var moveTo = null
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var previous = helpers.previousItem(item, item.nodeName)
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while (previous != null) {
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var bottomRight = coordinates.bottomRightOffset(previous)
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if (xmouse.y <= bottomRight.y && xmouse.x <= bottomRight.x) {
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moveTo = previous
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}
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previous = helpers.previousItem(previous, item.nodeName)
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}
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if (moveTo != null) {
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helpers.moveBefore(item, moveTo)
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return
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}
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var next = helpers.nextItem(item, item.nodeName)
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while (next != null) {
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var topLeft = coordinates.topLeftOffset(next)
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if (topLeft.y <= xmouse.y && topLeft.x <= xmouse.x) {
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moveTo = next
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}
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next = helpers.nextItem(next, item.nodeName)
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}
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if (moveTo != null) {
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helpers.moveBefore(item, helpers.nextItem(moveTo, item.nodeName))
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return
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}
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},
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_onDragEnd : function(dragEvent) {
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ToolMan.coordinates().create(0, 0).reposition(dragEvent.group.element)
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}
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}
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