| 1 |
|
| 2 |
|
| 3 |
|
| 4 |
|
| 5 | El.drag = function(handler, node, next, params) {
|
| 6 | var mouseStart, dragStart, topPos, leftPos
|
| 7 |
|
| 8 | if (typeof handler == "string") {
|
| 9 | handler = El.find(handler)
|
| 10 | }
|
| 11 | if (typeof node == "string") {
|
| 12 | node = El.find(node)
|
| 13 | }
|
| 14 |
|
| 15 | if (!node) node = handler
|
| 16 |
|
| 17 | var parent = node.parentNode
|
| 18 |
|
| 19 | Event.touchAsMouse(handler)
|
| 20 | El.on(handler, "mousedown", drag)
|
| 21 |
|
| 22 | function drag(e) {
|
| 23 | if (e.button) return
|
| 24 |
|
| 25 | var target = e.target || e.srcElement
|
| 26 | , tagName = target && target.tagName
|
| 27 | , top = node.style.top
|
| 28 |
|
| 29 | if (
|
| 30 | !tagName ||
|
| 31 | tagName === "INPUT" ||
|
| 32 | tagName === "TEXTAREA" ||
|
| 33 | tagName === "SELECT" ||
|
| 34 | El.hasClass(target, "no-drag")
|
| 35 | ){
|
| 36 | return
|
| 37 | }
|
| 38 |
|
| 39 | mouseStart = El.mouse(e)
|
| 40 |
|
| 41 | dragStart = {
|
| 42 | top: parseInt(top, 10) || 0,
|
| 43 | left: parseInt(node.style.left, 10) || 0
|
| 44 | }
|
| 45 | if (top && top.indexOf("%") > -1) {
|
| 46 | dragStart.top *= parent.offsetHeight / 100
|
| 47 | dragStart.left *= parent.offsetWidth / 100
|
| 48 | }
|
| 49 |
|
| 50 | El.on(document, "mouseup", dragEnd)
|
| 51 | El.on(document, "mousemove", dragMove)
|
| 52 | if (e.preventDefault) e.preventDefault()
|
| 53 | return false
|
| 54 | }
|
| 55 |
|
| 56 | function dragMove(e) {
|
| 57 | var mouse = El.mouse(e)
|
| 58 | , leftMax = parent.clientWidth >> 2
|
| 59 | , leftMin = leftMax - node.offsetWidth
|
| 60 | , topMax = parent.clientHeight >> 2
|
| 61 | , topMin = topMax - node.offsetHeight
|
| 62 | leftMax *= 3
|
| 63 | topMax *= 3
|
| 64 |
|
| 65 | leftPos = dragStart.left - mouseStart.left + mouse.left
|
| 66 | topPos = dragStart.top - mouseStart.top + mouse.top
|
| 67 |
|
| 68 | if (leftPos > leftMax) leftPos = leftMax
|
| 69 | else if (leftPos < leftMin) leftPos = leftMin
|
| 70 | if (topPos > topMax) topPos = topMax
|
| 71 | else if (topPos < topMin) topPos = topMin
|
| 72 |
|
| 73 | node.style.left = leftPos + "px"
|
| 74 | node.style.top = topPos + "px"
|
| 75 | return false
|
| 76 | }
|
| 77 |
|
| 78 | function dragEnd() {
|
| 79 | if (next && Math.abs(topPos - dragStart.top) + Math.abs(leftPos - dragStart.left) > 5) {
|
| 80 | next()
|
| 81 | }
|
| 82 | El.off(document, "mousemove", dragMove)
|
| 83 | El.off(document, "mouseup", dragEnd)
|
| 84 | return false
|
| 85 | }
|
| 86 | }
|
| 87 |
|
| 88 |
|