X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/src/dd/ScrollManager.js diff --git a/src/dd/ScrollManager.js b/src/dd/ScrollManager.js new file mode 100644 index 00000000..c03aae79 --- /dev/null +++ b/src/dd/ScrollManager.js @@ -0,0 +1,201 @@ +/*! + * Ext JS Library 3.0.0 + * Copyright(c) 2006-2009 Ext JS, LLC + * licensing@extjs.com + * http://www.extjs.com/license + */ +/** + * @class Ext.dd.ScrollManager + *
Provides automatic scrolling of overflow regions in the page during drag operations.
+ *The ScrollManager configs will be used as the defaults for any scroll container registered with it, + * but you can also override most of the configs per scroll container by adding a + * ddScrollConfig object to the target element that contains these properties: {@link #hthresh}, + * {@link #vthresh}, {@link #increment} and {@link #frequency}. Example usage: + *
+var el = Ext.get('scroll-ct');
+el.ddScrollConfig = {
+ vthresh: 50,
+ hthresh: -1,
+ frequency: 100,
+ increment: 200
+};
+Ext.dd.ScrollManager.register(el);
+
+ * Note: This class uses "Point Mode" and is untested in "Intersect Mode".
+ * @singleton
+ */
+Ext.dd.ScrollManager = function(){
+ var ddm = Ext.dd.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 = Ext.dd.ScrollManager;
+ var inc = proc.el.ddScrollConfig ?
+ proc.el.ddScrollConfig.increment : dds.increment;
+ if(!dds.animate){
+ if(proc.el.scroll(proc.dir, inc)){
+ triggerRefresh();
+ }
+ }else{
+ proc.el.scroll(proc.dir, inc, 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;
+ var freq = (el.ddScrollConfig && el.ddScrollConfig.frequency) ?
+ el.ddScrollConfig.frequency : Ext.dd.ScrollManager.frequency;
+ proc.id = setInterval(doScroll, freq);
+ };
+
+ var onFire = function(e, isDrop){
+ if(isDrop || !ddm.dragCurrent){ return; }
+ var dds = Ext.dd.ScrollManager;
+ if(!dragEl || dragEl != ddm.dragCurrent){
+ dragEl = ddm.dragCurrent;
+ // refresh regions on drag start
+ dds.refreshCache();
+ }
+
+ var xy = Ext.lib.Event.getXY(e);
+ var pt = new Ext.lib.Point(xy[0], xy[1]);
+ for(var id in els){
+ var el = els[id], r = el._region;
+ var c = el.ddScrollConfig ? el.ddScrollConfig : dds;
+ if(r && r.contains(pt) && el.isScrollable()){
+ if(r.bottom - pt.y <= c.vthresh){
+ if(proc.el != el){
+ startProc(el, "down");
+ }
+ return;
+ }else if(r.right - pt.x <= c.hthresh){
+ if(proc.el != el){
+ startProc(el, "left");
+ }
+ return;
+ }else if(pt.y - r.top <= c.vthresh){
+ if(proc.el != el){
+ startProc(el, "up");
+ }
+ return;
+ }else if(pt.x - r.left <= c.hthresh){
+ 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 {Mixed/Array} el The id of or the element to be scrolled or an array of either
+ */
+ register : function(el){
+ if(Ext.isArray(el)){
+ for(var i = 0, len = el.length; i < len; i++) {
+ this.register(el[i]);
+ }
+ }else{
+ el = Ext.get(el);
+ els[el.id] = el;
+ }
+ },
+
+ /**
+ * Unregisters overflow element(s) so they are no longer scrolled
+ * @param {Mixed/Array} el The id of or the element to be removed or an array of either
+ */
+ unregister : function(el){
+ if(Ext.isArray(el)){
+ for(var i = 0, len = el.length; i < len; i++) {
+ this.unregister(el[i]);
+ }
+ }else{
+ el = Ext.get(el);
+ delete els[el.id];
+ }
+ },
+
+ /**
+ * The number of pixels from the top or bottom edge of a container the pointer needs to be to
+ * trigger scrolling (defaults to 25)
+ * @type Number
+ */
+ vthresh : 25,
+ /**
+ * The number of pixels from the right or left edge of a container the pointer needs to be to
+ * trigger scrolling (defaults to 25)
+ * @type Number
+ */
+ hthresh : 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 Ext.dd.ScrollManager.frequency! (defaults to .4)
+ * @type Number
+ */
+ animDuration: .4,
+
+ /**
+ * Manually trigger a cache refresh.
+ */
+ refreshCache : function(){
+ for(var id in els){
+ if(typeof els[id] == 'object'){ // for people extending the object prototype
+ els[id]._region = els[id].getRegion();
+ }
+ }
+ }
+ };
+}();
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