Diffstat (limited to 'frontend/beta/js/YUI-extensions/dd/ScrollManager.js') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | frontend/beta/js/YUI-extensions/dd/ScrollManager.js | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/frontend/beta/js/YUI-extensions/dd/ScrollManager.js b/frontend/beta/js/YUI-extensions/dd/ScrollManager.js new file mode 100644 index 0000000..615aadf --- a/dev/null +++ b/frontend/beta/js/YUI-extensions/dd/ScrollManager.js @@ -0,0 +1,171 @@ +// kill dependency issue
+if(YAHOO.util.DragDrop){
+/**
+ * @class YAHOO.ext.dd.ScrollManager
+ * Provides automatic scrolling of overflow regions in the page during drag operations.<br><br>
+ * <b>Note: This class uses "Point Mode" and is untested in "Intersect Mode".</b>
+ * @singleton
+ */
+YAHOO.ext.dd.ScrollManager = function(){
+ var ddm = YAHOO.util.DragDropMgr;
+ var els = {};
+ var dragEl = null;
+ var proc = {};
+
+ var onStop = function(e){
+ dragEl = null;
+ clearProc();
+ };
+
+ var triggerRefresh = function(){
+ if(ddm.dragCurrent){
+ ddm.refreshCache(ddm.dragCurrent.groups);
+ }
+ }
+
+ var doScroll = function(){
+ if(ddm.dragCurrent){
+ var dds = YAHOO.ext.dd.ScrollManager;
+ if(!dds.animate || !YAHOO.util.Scroll){
+ if(proc.el.scroll(proc.dir, dds.increment)){
+ triggerRefresh();
+ }
+ }else{
+ proc.el.scroll(proc.dir, dds.increment, true, dds.animDuration, triggerRefresh);
+ }
+ }
+ };
+
+ var clearProc = function(){
+ if(proc.id){
+ clearInterval(proc.id);
+ }
+ proc.id = 0;
+ proc.el = null;
+ proc.dir = '';
+ };
+
+ var startProc = function(el, dir){
+ clearProc();
+ proc.el = el;
+ proc.dir = dir;
+ proc.id = setInterval(doScroll, YAHOO.ext.dd.ScrollManager.frequency);
+ };
+
+ var onFire = function(e, isDrop){
+ if(isDrop || !ddm.dragCurrent){ return; }
+ var dds = YAHOO.ext.dd.ScrollManager;
+ if(!dragEl || dragEl != ddm.dragCurrent){
+ dragEl = ddm.dragCurrent;
+ // refresh regions on drag start
+ dds.refreshCache();
+ }
+
+ var xy = YAHOO.util.Event.getXY(e);
+ var pt = new YAHOO.util.Point(xy[0], xy[1]);
+ for(var id in els){
+ var el = els[id], r = el._region;
+ if(r.contains(pt) && el.isScrollable()){
+ if(r.bottom - pt.y <= dds.thresh){
+ if(proc.el != el){
+ startProc(el, 'down');
+ }
+ return;
+ }else if(r.right - pt.x <= dds.thresh){
+ if(proc.el != el){
+ startProc(el, 'left');
+ }
+ return;
+ }else if(pt.y - r.top <= dds.thresh){
+ if(proc.el != el){
+ startProc(el, 'up');
+ }
+ return;
+ }else if(pt.x - r.left <= dds.thresh){
+ if(proc.el != el){
+ startProc(el, 'right');
+ }
+ return;
+ }
+ }
+ }
+ clearProc();
+ };
+
+ ddm.fireEvents = ddm.fireEvents.createSequence(onFire, ddm);
+ ddm.stopDrag = ddm.stopDrag.createSequence(onStop, ddm);
+
+ return {
+ /**
+ * Registers new overflow element(s) to auto scroll
+ * @param {String/HTMLElement/Element/Array} el The id of or the element to be scrolled or an array of either
+ */
+ register : function(el){
+ if(el instanceof Array){
+ for(var i = 0, len = el.length; i < len; i++) {
+ this.register(el[i]);
+ }
+ }else{
+ el = getEl(el);
+ els[el.id] = el;
+ }
+ },
+
+ /**
+ * Unregisters overflow element(s) so they are no longer scrolled
+ * @param {String/HTMLElement/Element/Array} el The id of or the element to be removed or an array of either
+ */
+ unregister : function(el){
+ if(el instanceof Array){
+ for(var i = 0, len = el.length; i < len; i++) {
+ this.unregister(el[i]);
+ }
+ }else{
+ el = getEl(el);
+ delete els[el.id];
+ }
+ },
+
+ /**
+ * The number of pixels from the edge of a container the pointer needs to be to
+ * trigger scrolling (defaults to 25)
+ * @type Number
+ */
+ thresh : 25,
+
+ /**
+ * The number of pixels to scroll in each scroll increment (defaults to 50)
+ * @type Number
+ */
+ increment : 100,
+
+ /**
+ * The frequency of scrolls in milliseconds (defaults to 500)
+ * @type Number
+ */
+ frequency : 500,
+
+ /**
+ * True to animate the scroll (defaults to true)
+ * @type Boolean
+ */
+ animate: true,
+
+ /**
+ * The animation duration in seconds -
+ * MUST BE less than YAHOO.ext.dd.ScrollManager.frequency! (defaults to .4)
+ * @type Number
+ */
+ animDuration: .4,
+
+ /**
+ * Manually trigger a cache refresh.
+ */
+ refreshCache : function(){
+ for(var id in els){
+ els[id]._region = els[id].getRegion();
+ }
+ }
+ }
+}();
+} |