48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
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(function ($) {
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$.fn.draggable = function (controlelement) {
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var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
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var elmnt = $(this), ce = controlelement instanceof jQuery ? controlelement : elmnt.find(controlelement);
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function dragMouseDown(e) {
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e.stopPropagation();
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e.preventDefault();
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// get the mouse cursor position at startup:
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pos3 = e.clientX;
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pos4 = e.clientY;
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document.onmouseup = closeDragElement;
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// call a function whenever the cursor moves:
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document.onmousemove = elementDrag;
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}
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function elementDrag(e) {
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e = e || window.event;
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e.preventDefault();
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// calculate the new cursor position:
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pos1 = pos3 - e.clientX;
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pos2 = pos4 - e.clientY;
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pos3 = e.clientX;
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pos4 = e.clientY;
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// set the element's new position:
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elmnt.css('top', (elmnt.offset().top - pos2) + 'px');
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elmnt.css('left', (elmnt.offset().left - pos1) + 'px');
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}
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function closeDragElement() {
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// stop moving when mouse button is released:
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document.onmouseup = null;
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document.onmousemove = null;
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}
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if (typeof controlelement !== 'undefined' && ce.length > 0) {
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ce.mousedown(dragMouseDown).addClass('dctrl');
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} else {
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elmnt.mousedown(dragMouseDown).addClass('dctrl');
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}
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return $(this);
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}
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})(jQuery); |