X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/src/dd/DragTracker.js?ds=sidebyside
diff --git a/src/dd/DragTracker.js b/src/dd/DragTracker.js
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+++ b/src/dd/DragTracker.js
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+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**
+ * @class Ext.dd.DragTracker
+ * @extends Ext.util.Observable
+ */
+Ext.dd.DragTracker = function(config){
+ Ext.apply(this, config);
+ this.addEvents(
+ /**
+ * @event mousedown
+ * @param {Object} this
+ * @param {Object} e event object
+ */
+ 'mousedown',
+ /**
+ * @event mouseup
+ * @param {Object} this
+ * @param {Object} e event object
+ */
+ 'mouseup',
+ /**
+ * @event mousemove
+ * @param {Object} this
+ * @param {Object} e event object
+ */
+ 'mousemove',
+ /**
+ * @event dragstart
+ * @param {Object} this
+ * @param {Object} startXY the page coordinates of the event
+ */
+ 'dragstart',
+ /**
+ * @event dragend
+ * @param {Object} this
+ * @param {Object} e event object
+ */
+ 'dragend',
+ /**
+ * @event drag
+ * @param {Object} this
+ * @param {Object} e event object
+ */
+ 'drag'
+ );
+
+ this.dragRegion = new Ext.lib.Region(0,0,0,0);
+
+ if(this.el){
+ this.initEl(this.el);
+ }
+}
+
+Ext.extend(Ext.dd.DragTracker, Ext.util.Observable, {
+ /**
+ * @cfg {Boolean} active
+ * Defaults to false.
+ */
+ active: false,
+ /**
+ * @cfg {Number} tolerance
+ * Defaults to 5.
+ */
+ tolerance: 5,
+ /**
+ * @cfg {Boolean/Number} autoStart
+ * Defaults to false. Specify true to defer trigger start by 1000 ms.
+ * Specify a Number for the number of milliseconds to defer trigger start.
+ */
+ autoStart: false,
+
+ initEl: function(el){
+ this.el = Ext.get(el);
+ el.on('mousedown', this.onMouseDown, this,
+ this.delegate ? {delegate: this.delegate} : undefined);
+ },
+
+ destroy : function(){
+ this.el.un('mousedown', this.onMouseDown, this);
+ },
+
+ onMouseDown: function(e, target){
+ if(this.fireEvent('mousedown', this, e) !== false && this.onBeforeStart(e) !== false){
+ this.startXY = this.lastXY = e.getXY();
+ this.dragTarget = this.delegate ? target : this.el.dom;
+ if(this.preventDefault !== false){
+ e.preventDefault();
+ }
+ var doc = Ext.getDoc();
+ doc.on('mouseup', this.onMouseUp, this);
+ doc.on('mousemove', this.onMouseMove, this);
+ doc.on('selectstart', this.stopSelect, this);
+ if(this.autoStart){
+ this.timer = this.triggerStart.defer(this.autoStart === true ? 1000 : this.autoStart, this);
+ }
+ }
+ },
+
+ onMouseMove: function(e, target){
+ // HACK: IE hack to see if button was released outside of window. */
+ if(this.active && Ext.isIE && !e.browserEvent.button){
+ e.preventDefault();
+ this.onMouseUp(e);
+ return;
+ }
+
+ e.preventDefault();
+ var xy = e.getXY(), s = this.startXY;
+ this.lastXY = xy;
+ if(!this.active){
+ if(Math.abs(s[0]-xy[0]) > this.tolerance || Math.abs(s[1]-xy[1]) > this.tolerance){
+ this.triggerStart();
+ }else{
+ return;
+ }
+ }
+ this.fireEvent('mousemove', this, e);
+ this.onDrag(e);
+ this.fireEvent('drag', this, e);
+ },
+
+ onMouseUp: function(e){
+ var doc = Ext.getDoc();
+ doc.un('mousemove', this.onMouseMove, this);
+ doc.un('mouseup', this.onMouseUp, this);
+ doc.un('selectstart', this.stopSelect, this);
+ e.preventDefault();
+ this.clearStart();
+ var wasActive = this.active;
+ this.active = false;
+ delete this.elRegion;
+ this.fireEvent('mouseup', this, e);
+ if(wasActive){
+ this.onEnd(e);
+ this.fireEvent('dragend', this, e);
+ }
+ },
+
+ triggerStart: function(isTimer){
+ this.clearStart();
+ this.active = true;
+ this.onStart(this.startXY);
+ this.fireEvent('dragstart', this, this.startXY);
+ },
+
+ clearStart : function(){
+ if(this.timer){
+ clearTimeout(this.timer);
+ delete this.timer;
+ }
+ },
+
+ stopSelect : function(e){
+ e.stopEvent();
+ return false;
+ },
+
+ onBeforeStart : function(e){
+
+ },
+
+ onStart : function(xy){
+
+ },
+
+ onDrag : function(e){
+
+ },
+
+ onEnd : function(e){
+
+ },
+
+ getDragTarget : function(){
+ return this.dragTarget;
+ },
+
+ getDragCt : function(){
+ return this.el;
+ },
+
+ getXY : function(constrain){
+ return constrain ?
+ this.constrainModes[constrain].call(this, this.lastXY) : this.lastXY;
+ },
+
+ getOffset : function(constrain){
+ var xy = this.getXY(constrain);
+ var s = this.startXY;
+ return [s[0]-xy[0], s[1]-xy[1]];
+ },
+
+ constrainModes: {
+ 'point' : function(xy){
+
+ if(!this.elRegion){
+ this.elRegion = this.getDragCt().getRegion();
+ }
+
+ var dr = this.dragRegion;
+
+ dr.left = xy[0];
+ dr.top = xy[1];
+ dr.right = xy[0];
+ dr.bottom = xy[1];
+
+ dr.constrainTo(this.elRegion);
+
+ return [dr.left, dr.top];
+ }
+ }
+});
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