Created
December 17, 2013 22:59
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element dragging with jscript
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| <html> | |
| <head> | |
| <script src="lib/moving.js"></script> | |
| <script> | |
| function getID(eName) { | |
| return document.getElementById(eName); | |
| } | |
| addEventListener("load", function() { | |
| var o1 = getID("1"), o2 = getID("2"); | |
| var o3 = getID("3"), o4 = getID("4"); | |
| Moving.plugIn(moveSupport, o1); | |
| Moving.plugIn(moveSupport, o2); | |
| Moving.plugIn(moveSupport, o3); | |
| Moving.plugIn(moveSupport, o4); | |
| }); | |
| </script> | |
| <style> | |
| .nr { | |
| width: 16px; /* a shape is a 16px square */ | |
| position: fixed; | |
| right: 5px; | |
| top: 5px; | |
| } | |
| .shape { | |
| width: 14px; | |
| height: 14px; | |
| border: 1px dashed black; | |
| } | |
| .red { | |
| background: red; | |
| } | |
| .blue { | |
| background: blue; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="nr"> | |
| <div class="shape red" id="1"></div> | |
| <div class="shape blue" id="2"></div> | |
| <div class="shape red" id="3"></div> | |
| <div class="shape blue" id="4"></div> | |
| </div> | |
| </body> | |
| </html> |
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| var Moving = { | |
| plugIn: function(listener, elm) { | |
| elm.addEventListener("mousedown", listener); | |
| } | |
| } | |
| function moveSupport(event) { | |
| var element = event.target; | |
| var moveListener; | |
| var releaseListener; | |
| var insideElmOffsetX; | |
| var insideElmOffsetY; | |
| insideElmOffsetX = Math.abs(element.offsetLeft - event.pageX); | |
| insideElmOffsetY = Math.abs(element.offsetTop - event.pageY); | |
| element.style.zIndex = 1; | |
| element.style.cursor = "-moz-grabbing"; | |
| if (! element.moved) { | |
| element.moved = true; | |
| element.style.position = "absolute"; | |
| element.style.left = event.pageX - insideElmOffsetX; | |
| element.style.top = event.pageY - insideElmOffsetY; | |
| } | |
| moveListener = function(event) { | |
| element.style.left = event.pageX - insideElmOffsetX; | |
| element.style.top = event.pageY - insideElmOffsetY; | |
| } | |
| releaseListener = function(event) { | |
| element.style.zIndex = "auto"; | |
| element.style.cursor = "-moz-grab"; | |
| document.removeEventListener("mousemove", moveListener); | |
| document.removeEventListener("mouseup", releaseListener); | |
| } | |
| document.addEventListener("mousemove", moveListener); | |
| document.addEventListener("mouseup", releaseListener); | |
| } |
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