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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Using Interaction Groups</title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts-min.css" />
<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="../../build/dragdrop/dragdrop-min.js"></script>
<!--begin custom header content for this example-->
<style type="text/css">
.slot { border:2px solid #aaaaaa; background-color:#dddddd; color:#666666; text-align:center; position: absolute; width:60px; height:60px; }
.player { border:2px solid #bbbbbb; color:#eeeeee; text-align:center; position: absolute; width:60px; height:60px; }
.target { border:2px solid #574188; background-color:#cccccc; text-align:center; position: absolute; width:60px; height:60px; }
#t1 { left: 10px; top: 0px; }
#t2 { left: 378px; top: 0px; }
#b1 { left: 84px; top: 50px; }
#b2 { left: 158px; top: 50px; }
#b3 { left: 232px; top: 50px; }
#b4 { left: 306px; top: 50px; }
#pt1 { background-color:#7E695E; left: 84px; top: 150px; }
#pt2 { background-color:#7E695E; left: 84px; top: 230px; }
#pb1 { background-color:#416153; left: 195px; top: 150px; }
#pb2 { background-color:#416153; left: 195px; top: 230px; }
#pboth1 { background-color:#552E37; left: 306px; top: 150px; }
#pboth2 { background-color:#552E37; left: 306px; top: 230px; }
#usercontrols {
top: -36px;
}
#workarea {
position: relative;
height: 300px;
}
</style>
<!--end custom header content for this example-->
</head>
<body class="yui-skin-sam">
<h1>Using Interaction Groups</h1>
<div class="exampleIntro">
<p>Using interaction groups, this example demonstrates how to
tie into the <a href="http://developer.yahoo.com/yui/dragdrop/">Drag & Drop Utility</a>'s interesting moments to provide visual
affordances for the current drag operation.</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="usercontrols">
Interaction Mode:
<select id="ddmode" >
<option value="0" selected>Point</option>
<option value="1">Intersect</option>
</select>
</div>
<div id="workarea">
<div class="slot" id="t1" >1</div>
<div class="slot" id="t2" >2</div>
<div class="slot" id="b1" >3</div>
<div class="slot" id="b2" >4</div>
<div class="slot" id="b3" >5</div>
<div class="slot" id="b4" >6</div>
<div class="player" id="pt1" >1</div>
<div class="player" id="pt2" >2</div>
<div class="player" id="pb1" >3</div>
<div class="player" id="pb2" >4</div>
<div class="player" id="pboth1" >5</div>
<div class="player" id="pboth2" >6</div>
</div>
<script type="text/javascript">
(function() {
YAHOO.example.DDPlayer = function(id, sGroup, config) {
YAHOO.example.DDPlayer.superclass.constructor.apply(this, arguments);
this.initPlayer(id, sGroup, config);
};
YAHOO.extend(YAHOO.example.DDPlayer, YAHOO.util.DDProxy, {
TYPE: "DDPlayer",
initPlayer: function(id, sGroup, config) {
if (!id) {
return;
}
var el = this.getDragEl()
YAHOO.util.Dom.setStyle(el, "borderColor", "transparent");
YAHOO.util.Dom.setStyle(el, "opacity", 0.76);
// specify that this is not currently a drop target
this.isTarget = false;
this.originalStyles = [];
this.type = YAHOO.example.DDPlayer.TYPE;
this.slot = null;
this.startPos = YAHOO.util.Dom.getXY( this.getEl() );
YAHOO.log(id + " startpos: " + this.startPos, "info", "example");
},
startDrag: function(x, y) {
YAHOO.log(this.id + " startDrag", "info", "example");
var Dom = YAHOO.util.Dom;
var dragEl = this.getDragEl();
var clickEl = this.getEl();
dragEl.innerHTML = clickEl.innerHTML;
dragEl.className = clickEl.className;
Dom.setStyle(dragEl, "color", Dom.getStyle(clickEl, "color"));
Dom.setStyle(dragEl, "backgroundColor", Dom.getStyle(clickEl, "backgroundColor"));
Dom.setStyle(clickEl, "opacity", 0.1);
var targets = YAHOO.util.DDM.getRelated(this, true);
YAHOO.log(targets.length + " targets", "info", "example");
for (var i=0; i<targets.length; i++) {
var targetEl = this.getTargetDomRef(targets[i]);
if (!this.originalStyles[targetEl.id]) {
this.originalStyles[targetEl.id] = targetEl.className;
}
targetEl.className = "target";
}
},
getTargetDomRef: function(oDD) {
if (oDD.player) {
return oDD.player.getEl();
} else {
return oDD.getEl();
}
},
endDrag: function(e) {
// reset the linked element styles
YAHOO.util.Dom.setStyle(this.getEl(), "opacity", 1);
this.resetTargets();
},
resetTargets: function() {
// reset the target styles
var targets = YAHOO.util.DDM.getRelated(this, true);
for (var i=0; i<targets.length; i++) {
var targetEl = this.getTargetDomRef(targets[i]);
var oldStyle = this.originalStyles[targetEl.id];
if (oldStyle) {
targetEl.className = oldStyle;
}
}
},
onDragDrop: function(e, id) {
// get the drag and drop object that was targeted
var oDD;
if ("string" == typeof id) {
oDD = YAHOO.util.DDM.getDDById(id);
} else {
oDD = YAHOO.util.DDM.getBestMatch(id);
}
var el = this.getEl();
// check if the slot has a player in it already
if (oDD.player) {
// check if the dragged player was already in a slot
if (this.slot) {
// check to see if the player that is already in the
// slot can go to the slot the dragged player is in
// YAHOO.util.DDM.isLegalTarget is a new method
if ( YAHOO.util.DDM.isLegalTarget(oDD.player, this.slot) ) {
YAHOO.log("swapping player positions", "info", "example");
YAHOO.util.DDM.moveToEl(oDD.player.getEl(), el);
this.slot.player = oDD.player;
oDD.player.slot = this.slot;
} else {
YAHOO.log("moving player in slot back to start", "info", "example");
YAHOO.util.Dom.setXY(oDD.player.getEl(), oDD.player.startPos);
this.slot.player = null;
oDD.player.slot = null
}
} else {
// the player in the slot will be moved to the dragged
// players start position
oDD.player.slot = null;
YAHOO.util.DDM.moveToEl(oDD.player.getEl(), el);
}
} else {
// Move the player into the emply slot
// I may be moving off a slot so I need to clear the player ref
if (this.slot) {
this.slot.player = null;
}
}
YAHOO.util.DDM.moveToEl(el, oDD.getEl());
this.resetTargets();
this.slot = oDD;
this.slot.player = this;
},
swap: function(el1, el2) {
var Dom = YAHOO.util.Dom;
var pos1 = Dom.getXY(el1);
var pos2 = Dom.getXY(el2);
Dom.setXY(el1, pos2);
Dom.setXY(el2, pos1);
},
onDragOver: function(e, id) {
},
onDrag: function(e, id) {
}
});
var slots = [], players = [],
Event = YAHOO.util.Event, DDM = YAHOO.util.DDM;
Event.onDOMReady(function() {
// slots
slots[0] = new YAHOO.util.DDTarget("t1", "topslots");
slots[1] = new YAHOO.util.DDTarget("t2", "topslots");
slots[2] = new YAHOO.util.DDTarget("b1", "bottomslots");
slots[3] = new YAHOO.util.DDTarget("b2", "bottomslots");
slots[4] = new YAHOO.util.DDTarget("b3", "bottomslots");
slots[5] = new YAHOO.util.DDTarget("b4", "bottomslots");
// players
players[0] = new YAHOO.example.DDPlayer("pt1", "topslots");
players[1] = new YAHOO.example.DDPlayer("pt2", "topslots");
players[2] = new YAHOO.example.DDPlayer("pb1", "bottomslots");
players[3] = new YAHOO.example.DDPlayer("pb2", "bottomslots");
players[4] = new YAHOO.example.DDPlayer("pboth1", "topslots");
players[4].addToGroup("bottomslots");
players[5] = new YAHOO.example.DDPlayer("pboth2", "topslots");
players[5].addToGroup("bottomslots");
DDM.mode = document.getElementById("ddmode").selectedIndex;
Event.on("ddmode", "change", function(e) {
YAHOO.util.DDM.mode = this.selectedIndex;
});
});
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</body>
</html>
|
