This example shows a simple drag interaction that doesn't require a drop interaction.
First we need to create the work area, players (drags) and slots (drops).
<div id="workarea">
<div class="slot" id="t1">1</div>
<div class="slot bottom" id="b1">3</div>
<div class="slot bottom" id="b2">4</div>
<div class="slot bottom" id="b3">5</div>
<div class="slot bottom" id="b4">6</div>
<div class="slot" id="t2">2</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>
Now we give them some CSS to make them visible.
.slot {
border: 2px solid #808080;
background-color: #CDCDCD;
color: #666666;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
z-index: 0;
}
.player {
border: 2px solid #808080;
color: #ffffff;
text-align: center;
position: relative;
float: left;
margin: 4px;
width: 60px;
height: 60px;
top: 150px;
z-index: 1;
cursor: move;
}
#pt1 {
clear: both;
}
.bottom {
top: 50px;
}
#pt1, #pt2 {
background-color: #71241A;
}
#pb1, #pb2 {
background-color: #004C6D;
}
#pboth1, #pboth2 {
background-color: #FFA928;
}
#workarea {
position: relative;
height: 300px;
width: 500px;
}
#workarea .yui3-dd-drop-active-valid {
border: 2px solid green;
}
#workarea .yui3-dd-drop-over {
background-color: green;
}
#workarea .yui3-dd-drop-active-invalid {
border: 2px solid red;
}
Now we need to create our YUI instance and tell it to load the dd-drop, dd-proxy and dd-constrain modules.
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain');
Now that we have a YUI instance with the requested modules, we are going to create our Drop Targets.
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
//Get all the nodes with the class of .slot under #workarea
var slots = Y.one('#workarea').all('.slot');
//Loop through them
Y.each(slots, function(v, k) {
var id = v.get('id'), groups = ['two'];
//Assign them to different groups
switch (id) {
case 't1':
case 't2':
groups = ['one'];
break;
}
//Create the Drop object
var drop = new Y.DD.Drop({
node: v,
//With the new groups array as a config option
groups: groups
});
});
});
Now we need to create the Drag Nodes and assign them to the proper group.
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
//Snipped
var players = Y.one('#workarea').all('.player');
Y.each(players, function(v, k) {
var id = v.get('id'), groups = ['one', 'two'];
switch (id) {
case 'pt1':
case 'pt2':
groups = ['one'];
break;
case 'pb1':
case 'pb2':
groups = ['two'];
break;
}
var drag = new Y.DD.Drag({
node: v,
//Assign the Groups
groups: groups,
//Use Intersect Mode for the Target Calculations
dragMode: 'intersect',
}).plug(Y.Plugin.DDProxy, {
//We don't want the node to move on end drag
moveOnEnd: false
}).plug(Y.Plugin.DDConstrained, {
//Keep me inside the workarea
constrain2node: '#workarea'
});
});
Now we are going to listen for the following Drag Events: drag:start, drag:end, drag:drophit, drag:dropmiss
drag.on('drag:start', function() {
//In this event we setup some styles to make the nodes look pretty
var p = this.get('dragNode'),
n = this.get('node');
n.setStyle('opacity', .25);
if (!this._playerStart) {
this._playerStart = this.nodeXY;
}
//Put the Drag's HTML inside the proxy
p.set('innerHTML', n.get('innerHTML'));
//set some styles on the proxy
p.setStyles({
backgroundColor: n.getStyle('backgroundColor'),
color: n.getStyle('color'),
opacity: .65
});
});
drag.on('drag:end', function() {
//Undo some of the styles from the start
var n = this.get('node');
n.setStyle('opacity', '1');
});
drag.on('drag:drophit', function(e) {
//If we drop on a target, move to its position
var xy = e.drop.get('node').getXY();
this.get('node').setXY(xy);
});
drag.on('drag:dropmiss', function(e) {
//If we miss a target, move back to our start position
if (this._playerStart) {
this.get('node').setXY(this._playerStart);
this._playerStart = null;
}
});
YUI().use('dd-drop', 'dd-proxy', 'dd-constrain', function(Y) {
var slots = Y.one('#workarea').all('.slot');
Y.each(slots, function(v, k) {
var id = v.get('id'), groups = ['two'];
switch (id) {
case 't1':
case 't2':
groups = ['one'];
break;
}
var drop = new Y.DD.Drop({
node: v,
groups: groups
});
});
var players = Y.one('#workarea').all('.player');
Y.each(players, function(v, k) {
var id = v.get('id'), groups = ['one', 'two'];
switch (id) {
case 'pt1':
case 'pt2':
groups = ['one'];
break;
case 'pb1':
case 'pb2':
groups = ['two'];
break;
}
var drag = new Y.DD.Drag({
node: v,
groups: groups
}).plug(Y.Plugin.DDProxy, {
moveOnEnd: false
}).plug(Y.Plugin.DDConstrained, {
constrain2node: '#workarea'
});
drag.on('drag:start', function() {
var p = this.get('dragNode'),
n = this.get('node');
n.setStyle('opacity', .25);
if (!this._playerStart) {
this._playerStart = this.nodeXY;
}
p.set('innerHTML', n.get('innerHTML'));
p.setStyles({
backgroundColor: n.getStyle('backgroundColor'),
color: n.getStyle('color'),
opacity: .65
});
});
drag.on('drag:end', function() {
var n = this.get('node');
n.setStyle('opacity', '1');
});
drag.on('drag:drophit', function(e) {
var xy = e.drop.get('node').getXY();
this.get('node').setXY(xy, Y.UA.ie);
});
drag.on('drag:dropmiss', function(e) {
if (this._playerStart) {
this.get('node').setXY(this._playerStart, Y.UA.ie);
this._playerStart = null;
}
});
});
});