topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

professional-javascript-13-SimulatedDragAndDropExample4.htm / htm


  <html>
      <head>
          <title>Simulated Drag And Drop Example</title>
          <script type="text/javascript" src="eventutil.js"></script>
          <script type="text/javascript">
              
              var iDiffX = 0;
              var iDiffY = 0;
                     
              function handleMouseMove() {
                  var oEvent = EventUtil.getEvent();
                  var oDiv = document.getElementById("div1");
                  oDiv.style.left = oEvent.clientX - iDiffX;
                  oDiv.style.top = oEvent.clientY - iDiffY;
              }
                         
              function handleMouseDown() {
                  var oEvent = EventUtil.getEvent();
                  var oDiv = document.getElementById("div1");
                  iDiffX = oEvent.clientX - oDiv.offsetLeft;
                  iDiffY = oEvent.clientY - oDiv.offsetTop;
              
                  EventUtil.addEventHandler(document.body, "mousemove", handleMouseMove);
                  EventUtil.addEventHandler(document.body, "mouseup", handleMouseUp);
              }
              
              function handleMouseUp() {
                  var oEvent = EventUtil.getEvent();
                  EventUtil.removeEventHandler(document.body, "mousemove", handleMouseMove);
                  EventUtil.removeEventHandler(document.body, "mouseup", handleMouseUp);
                  
                  if (isOverDropTarget(oEvent.clientX,oEvent.clientY)) {
                      alert("dropped!");
                      var oDiv = document.getElementById("div1");
                      var oTarget = document.getElementById("divDropTarget");
                      oDiv.style.left = oTarget.offsetLeft;
                      oDiv.style.top = oTarget.offsetTop;
                  }                
              }
              
              function isOverDropTarget(iX, iY) {
                  var oTarget = document.getElementById("divDropTarget");
                  var iX1 = oTarget.offsetLeft;
                  var iX2 = iX1 + oTarget.offsetWidth;
                  var iY1 = oTarget.offsetTop;
                  var iY2 = iY1 + oTarget.offsetHeight;
                  
                  return (iX >= iX1 && iX <= iX2 && iY >= iY1 && iY <= iY2);
              }
              
          </script>
          <style type="text/css">
              #div1 {
                  background-color: red;
                  height: 100px;
                  width: 100px;
                  position: absolute;
                  z-index: 10;
              }
              
              #divDropTarget {
                  background-color: blue;
                  height: 200px;
                  width: 200px;
                  position: absolute;
                  left: 300px;
              }
          </style>
      </head>
      <body>
          <p>Try dragging the red square onto the blue square.</p>
          <div id="div1" onmousedown="handleMouseDown(event)"></div>
          <div id="divDropTarget"></div>
      </body>
  </html>

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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