125 lines
3.8 KiB
JavaScript
125 lines
3.8 KiB
JavaScript
if (typeof Survey == "undefined") {
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var Survey = {};
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}
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var Dom = YAHOO.util.Dom;
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var Event = YAHOO.util.Event;
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var DDM = YAHOO.util.DragDropMgr;
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Survey.DDList = function(id, sGroup, config) {
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Survey.DDList.superclass.constructor.call(this, id, sGroup, config);
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this.logger = this.logger || YAHOO;
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var el = this.getDragEl();
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Dom.setStyle(el, "opacity", 0.67); // The proxy is slightly transparent
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this.goingUp = false;
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this.lastY = 0;
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};
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YAHOO.extend(Survey.DDList, YAHOO.util.DDProxy, {
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startDrag: function(x, y) {
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this.logger.log(this.id + " startDrag");
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// make the proxy look like the source element
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var dragEl = this.getDragEl();
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var clickEl = this.getEl();
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Dom.setStyle(clickEl, "visibility", "hidden");
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dragEl.innerHTML = clickEl.innerHTML;
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Dom.setStyle(dragEl, "color", Dom.getStyle(clickEl, "color"));
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Dom.setStyle(dragEl, "backgroundColor", Dom.getStyle(clickEl, "backgroundColor"));
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Dom.setStyle(dragEl, "border", "2px solid gray");
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},
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endDrag: function(e) {
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var srcEl = this.getEl();
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var proxy = this.getDragEl();
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// Show the proxy element and animate it to the src element's location
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Dom.setStyle(proxy, "visibility", "");
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var a = new YAHOO.util.Motion(
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proxy, {
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points: {
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to: Dom.getXY(srcEl)
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}
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},
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0.2,
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YAHOO.util.Easing.easeOut
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)
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var proxyid = proxy.id;
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var thisid = this.id;
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// Hide the proxy and show the source element when finished with the animation
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a.onComplete.subscribe(function() {
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Dom.setStyle(proxyid, "visibility", "hidden");
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Dom.setStyle(thisid, "visibility", "");
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});
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a.animate();
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},
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onDragDrop: function(e, id) {
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// If there is one drop interaction, the li was dropped either on the list,
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// or it was dropped on the current location of the source element.
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if (DDM.interactionInfo.drop.length === 1) {
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// The position of the cursor at the time of the drop (YAHOO.util.Point)
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var pt = DDM.interactionInfo.point;
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// The region occupied by the source element at the time of the drop
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var region = DDM.interactionInfo.sourceRegion;
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// Check to see if we are over the source element's location. We will
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// append to the bottom of the list once we are sure it was a drop in
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// the negative space (the area of the list without any list items)
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if (!region.intersect(pt)) {
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var destEl = Dom.get(id);
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var destDD = DDM.getDDById(id);
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destEl.appendChild(this.getEl());
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destDD.isEmpty = false;
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DDM.refreshCache();
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}
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}
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Survey.Data.dragDrop(this.getEl());
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},
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onDrag: function(e) {
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// Keep track of the direction of the drag for use during onDragOver
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var y = Event.getPageY(e);
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if (y < this.lastY) {
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this.goingUp = true;
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} else if (y > this.lastY) {
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this.goingUp = false;
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}
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this.lastY = y;
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},
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onDragOver: function(e, id) {
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var srcEl = this.getEl();
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var destEl = Dom.get(id);
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// We are only concerned with list items, we ignore the dragover
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// notifications for the list.
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if (destEl.nodeName.toLowerCase() == "li") {
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var orig_p = srcEl.parentNode;
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var p = destEl.parentNode;
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if (this.goingUp) {
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p.insertBefore(srcEl, destEl); // insert above
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} else {
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p.insertBefore(srcEl, destEl.nextSibling); // insert below
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}
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DDM.refreshCache();
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}
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}
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});
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