| <?xml version="1.0" encoding="utf-8"?> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <title>Drag and drop and scrolling: dropping block element onto canvas inside scrollable container</title> |
| <style type="text/css"> |
| div[draggable] |
| {width:20px; |
| height:20px; |
| background-color:green;} |
| p + div |
| {height:100px; |
| width:100px; |
| overflow:scroll;} |
| canvas |
| {display:block; |
| margin:100px 0 0 100px;} |
| </style> |
| <script type="application/ecmascript"> |
| function paint(color) |
| {var canvas = document.querySelector('canvas'), |
| c = canvas.getContext('2d'); |
| c.fillStyle = color; |
| c.beginPath(); |
| c.moveTo(0,0); |
| c.lineTo(100,0); |
| c.lineTo(100,100); |
| c.lineTo(0,100); |
| c.closePath(); |
| c.fill();} |
| function start(event) |
| {event.dataTransfer.effectAllowed = 'copy'; |
| event.dataTransfer.setData('text/plain', 'green');} |
| </script> |
| </head> |
| <body onload="paint('gray')"> |
| <div draggable="true" ondragstart="start(event)"/> |
| <p>You should be able to drag green box above to the gray canvas in the right-bottom corner of the scrollable container (dragging towards the corner triggers scrolling). Canvas should be repainted to match dropped color.</p> |
| <div> |
| <canvas width="100" height="100" ondragenter="event.preventDefault()" ondragover="return false" ondrop="paint(event.dataTransfer.getData('text/plain'))">Canvas</canvas> |
| </div> |
| </body> |
| </html> |
