JavaScript Tutorial/Drag Drop/Drag Drop Event — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 08:24, 26 мая 2010
Содержание
- 1 Drop target events fire now
- 2 Get drag and drop event type: dragenter
- 3 Get drag and drop event type: dragover
- 4 Get drag and drop event type: dragstart
- 5 Get drag and drop event type: drop
- 6 Get text object from dataTransfer defined the Drag and drop event
- 7 Get URL object from dataTransfer defined the Drag and drop event
- 8 No drop target events fire
Drop target events fire now
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropEvent(oEvent) {
var oTextbox = document.getElementById("txt1");
oTextbox.value += oEvent.type + "\n";
switch(oEvent.type) {
case "dragover":
case "dragenter":
oEvent.returnValue = false;
}
}
</script>
</head>
<body>
<P>Try dragging the text from the textbox to the red square.
Drop target events fire now.</p>
<P>drag me</p>
<div style="background-color: red; height: 100px; width: 100px"
ondragenter="handleDragDropEvent(event)"
ondragover="handleDragDropEvent(event)"
ondragleave="handleDragDropEvent(event)"
ondrop="handleDragDropEvent(event)"></div></p>
<P><textarea rows="10" cols="25" readonly="readonly" id="txt1"></textarea></p>
</body>
</html>
Get drag and drop event type: dragenter
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropoEvent(oEvent) {
switch(oEvent.type) {
case "dragenter":
oEvent.dataTransfer.dropEffect = "move";
break;
}
}
</script>
</head>
<body>
<P>Try dragging the text in the textbox to the right textbox.</p>
<P><input type="text" value="drag this text" ondragstart="handleDragDropoEvent(event)" />
<input ondragenter="handleDragDropoEvent(event)"
ondragover="handleDragDropoEvent(event)"
ondrop="handleDragDropoEvent(event)">
</input>
</p>
</body>
</html>
Get drag and drop event type: dragover
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropoEvent(oEvent) {
switch(oEvent.type) {
case "dragover":
oEvent.returnValue = false;
break;
}
}
</script>
</head>
<body>
<P>Try dragging the text in the textbox to the right textbox.</p>
<P><input type="text" value="drag this text" ondragstart="handleDragDropoEvent(event)" />
<input ondragenter="handleDragDropoEvent(event)"
ondragover="handleDragDropoEvent(event)"
ondrop="handleDragDropoEvent(event)">
</input>
</p>
</body>
</html>
Get drag and drop event type: dragstart
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropoEvent(oEvent) {
switch(oEvent.type) {
case "dragstart":
oEvent.dataTransfer.effectAllowed = "move";
alert("dragstart");
break;
}
}
</script>
</head>
<body>
<P>Try dragging the text in the textbox to the right textbox.</p>
<P><input type="text" value="drag this text" ondragstart="handleDragDropoEvent(event)" />
<input ondragenter="handleDragDropoEvent(event)"
ondragover="handleDragDropoEvent(event)"
ondrop="handleDragDropoEvent(event)">
</input>
</p>
</body>
</html>
Get drag and drop event type: drop
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropoEvent(oEvent) {
switch(oEvent.type) {
case "drop":
oEvent.returnValue = false;
oEvent.srcElement.innerHTML = oEvent.dataTransfer.getData("text");
}
}
</script>
</head>
<body>
<P>Try dragging the text in the textbox to the right textbox.</p>
<P><input type="text" value="drag this text" ondragstart="handleDragDropoEvent(event)" />
<input ondragenter="handleDragDropoEvent(event)"
ondragover="handleDragDropoEvent(event)"
ondrop="handleDragDropoEvent(event)">
</input>
</p>
</body>
</html>
Get text object from dataTransfer defined the Drag and drop event
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropEvent(oEvent) {
switch(oEvent.type) {
case "dragover":
case "dragenter":
oEvent.returnValue = false;
break;
case "drop":
alert(oEvent.dataTransfer.getData("text"));
}
}
</script>
</head>
<body>
<P>show you the selected text when dropped.</p>
<P><input type="text" value="drag this text" />
<input type="test"
ondragenter="handleDragDropEvent(event)"
ondragover="handleDragDropEvent(event)"
ondrop="handleDragDropEvent(event)"></input></p>
</body>
</html>
Get URL object from dataTransfer defined the Drag and drop event
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropEvent(oEvent) {
switch(oEvent.type) {
case "dragover":
case "dragenter":
oEvent.returnValue = false;
break;
case "drop":
alert(oEvent.dataTransfer.getData("URL"));
}
}
</script>
</head>
<body>
<P>Try dragging the link to the red square.
It will show you the URL when dropped.</p>
<P><a href="http://www.wbex.ru">www.wbex.ru</a>
<input type="text"
ondragenter="handleDragDropEvent(event)"
ondragover="handleDragDropEvent(event)"
ondrop="handleDragDropEvent(event)"></div></p>
</body>
</html>
No drop target events fire
<html>
<head>
<title>System Drag And Drop Example</title>
<script type="text/javascript">
function handleDragDropEvent(oEvent) {
var oTextbox = document.getElementById("txt1");
oTextbox.value += oEvent.type + "\n";
}
</script>
</head>
<body>
<P>Try dragging the text from the textbox to the red square.
No drop target events fire.</p>
<P>Drag me</p>
<div style="background-color: red; height: 100px; width: 100px"
ondragenter="handleDragDropEvent(event)"
ondragover="handleDragDropEvent(event)"
ondragleave="handleDragDropEvent(event)"
ondrop="handleDragDropEvent(event)"></div></p>
<P><textarea rows="10" cols="25" id="txt1"></textarea></p>
</body>
</html>