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+This example shows a simple drag interaction that doesn't require a drop interaction.
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+Setting up the Work Area
+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;
+}
+
+
+Setting up the YUI Instance
+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');
+
+
+Setting up the Drop Targets
+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
+ });
+ });
+});
+
+
+Setting up the Drag Nodes
+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'
+ });
+});
+
+
+Handling the Drops and Moments
+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;
+ }
+});
+
+
+Full Javascript Code
+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;
+ }
+ });
+ });
+});
+
+