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| 1 <html> |
| 2 <head> |
| 3 <style> |
| 4 body { margin: 0; } |
| 5 #drag_div { |
| 6 width: 100%; |
| 7 height: 100%; |
| 8 background: blue; |
| 9 position: relative; |
| 10 } |
| 11 </style> |
| 12 <script> |
| 13 offsetX = 0; |
| 14 offsetY = 0; |
| 15 |
| 16 function drag(event) { |
| 17 d = document.getElementById('drag_div'); |
| 18 offsetX = event.clientX - d.offsetLeft; |
| 19 offsetY = event.clientY - d.offsetTop; |
| 20 } |
| 21 |
| 22 function drop(event) { |
| 23 d = document.getElementById('drag_div'); |
| 24 d.style.left = event.clientX - offsetX; |
| 25 d.style.top = event.clientY - offsetY; |
| 26 } |
| 27 |
| 28 function touchStart(event) { |
| 29 d = document.getElementById('drag_div'); |
| 30 offsetX = event.touches[0].clientX - d.offsetLeft; |
| 31 offsetY = event.touches[0].clientY - d.offsetTop; |
| 32 } |
| 33 |
| 34 function touchEnd(event) { |
| 35 d = document.getElementById('drag_div'); |
| 36 d.style.left = event.changedTouches[0].clientX - offsetX; |
| 37 d.style.top = event.changedTouches[0].clientY - offsetY; |
| 38 } |
| 39 |
| 40 </script> |
| 41 </head> |
| 42 |
| 43 <body id ="body"> |
| 44 <div id="drag_div"> </div> |
| 45 </body> |
| 46 <script> |
| 47 document.getElementById('body').addEventListener('mouseup', drop); |
| 48 document.getElementById('body').addEventListener('touchend', touchEnd); |
| 49 document.getElementById('drag_div').addEventListener('mousedown', drag); |
| 50 document.getElementById('drag_div').addEventListener('touchstart', touchStart)
; |
| 51 </script> |
| 52 </html> |
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