86 lines
2.1 KiB
JavaScript
86 lines
2.1 KiB
JavaScript
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/**
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*
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* Crossbrowser Drag Handler
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* http://www.webtoolkit.info/
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*
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* Modified by Erik Youngren to move parent node
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**/
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var DragHandler = {
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// private property.
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_oElem : null,
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// public method. Attach drag handler to an element.
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attach : function(oElem) {
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oElem.onmousedown = DragHandler._dragBegin;
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// callbacks
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oElem.dragBegin = new Function();
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oElem.drag = new Function();
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oElem.dragEnd = new Function();
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return oElem;
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},
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// private method. Begin drag process.
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_dragBegin : function(e) {
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var oElem = DragHandler._oElem = this;
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if (isNaN(parseInt(oElem.parentNode.style.left))) { oElem.parentNode.style.left = '0px'; }
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if (isNaN(parseInt(oElem.parentNode.style.top))) { oElem.parentNode.style.top = '0px'; }
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var x = parseInt(oElem.parentNode.style.left);
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var y = parseInt(oElem.parentNode.style.top);
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e = e ? e : window.event;
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oElem.mouseX = e.clientX;
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oElem.mouseY = e.clientY;
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oElem.dragBegin(oElem, x, y);
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document.onmousemove = DragHandler._drag;
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document.onmouseup = DragHandler._dragEnd;
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return false;
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},
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// private method. Drag (move) element.
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_drag : function(e) {
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var oElem = DragHandler._oElem;
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var x = parseInt(oElem.parentNode.style.left);
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var y = parseInt(oElem.parentNode.style.top);
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e = e ? e : window.event;
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oElem.parentNode.style.left = x + (e.clientX - oElem.mouseX) + 'px';
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oElem.parentNode.style.top = y + (e.clientY - oElem.mouseY) + 'px';
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oElem.mouseX = e.clientX;
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oElem.mouseY = e.clientY;
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oElem.drag(oElem, x, y);
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return false;
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},
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// private method. Stop drag process.
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_dragEnd : function() {
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var oElem = DragHandler._oElem;
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var x = parseInt(oElem.parentNode.style.left);
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var y = parseInt(oElem.parentNode.style.top);
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oElem.dragEnd(oElem, x, y);
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document.onmousemove = null;
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document.onmouseup = null;
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DragHandler._oElem = null;
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}
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}
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