Upgrade to ExtJS 3.1.0 - Released 12/16/2009

[extjs.git] / examples / ux / treegrid / TreeGridColumnResizer.js

diff --git a/examples/ux/treegrid/TreeGridColumnResizer.js b/examples/ux/treegrid/TreeGridColumnResizer.js
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+++ b/examples/ux/treegrid/TreeGridColumnResizer.js
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+/*!
+ * Ext JS Library 3.1.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**
+ * @class Ext.tree.ColumnResizer
+ * @extends Ext.util.Observable
+ */
+Ext.tree.ColumnResizer = Ext.extend(Ext.util.Observable, {
+    /**
+     * @cfg {Number} minWidth The minimum width the column can be dragged to.
+     * Defaults to <tt>14</tt>.
+     */
+    minWidth: 14,
+
+    constructor: function(config){
+        Ext.apply(this, config);
+        Ext.tree.ColumnResizer.superclass.constructor.call(this);
+    },
+
+    init : function(tree){
+        this.tree = tree;
+        tree.on('render', this.initEvents, this);
+    },
+
+    initEvents : function(tree){
+        tree.mon(tree.innerHd, 'mousemove', this.handleHdMove, this);
+        this.tracker = new Ext.dd.DragTracker({
+            onBeforeStart: this.onBeforeStart.createDelegate(this),
+            onStart: this.onStart.createDelegate(this),
+            onDrag: this.onDrag.createDelegate(this),
+            onEnd: this.onEnd.createDelegate(this),
+            tolerance: 3,
+            autoStart: 300
+        });
+        this.tracker.initEl(tree.innerHd);
+        tree.on('beforedestroy', this.tracker.destroy, this.tracker);
+    },
+
+    handleHdMove : function(e, t){
+        var hw = 5,
+            x = e.getPageX(),
+            hd = e.getTarget('.x-treegrid-hd', 3, true);
+        
+        if(hd){                                 
+            var r = hd.getRegion(),
+                ss = hd.dom.style,
+                pn = hd.dom.parentNode;
+            
+            if(x - r.left <= hw && hd.dom !== pn.firstChild) {
+                var ps = hd.dom.previousSibling;
+                while(ps && Ext.fly(ps).hasClass('x-treegrid-hd-hidden')) {
+                    ps = ps.previousSibling;
+                }
+                if(ps) {                    
+                    this.activeHd = Ext.get(ps);
+                               ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';
+                }
+            } else if(r.right - x <= hw) {
+                var ns = hd.dom;
+                while(ns && Ext.fly(ns).hasClass('x-treegrid-hd-hidden')) {
+                    ns = ns.previousSibling;
+                }
+                if(ns) {
+                    this.activeHd = Ext.get(ns);
+                               ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';                    
+                }
+            } else{
+                delete this.activeHd;
+                ss.cursor = '';
+            }
+        }
+    },
+
+    onBeforeStart : function(e){
+        this.dragHd = this.activeHd;
+        return !!this.dragHd;
+    },
+
+    onStart : function(e){
+        this.tree.headersDisabled = true;
+        this.proxy = this.tree.body.createChild({cls:'x-treegrid-resizer'});
+        this.proxy.setHeight(this.tree.body.getHeight());
+
+        var x = this.tracker.getXY()[0];
+
+        this.hdX = this.dragHd.getX();
+        this.hdIndex = this.tree.findHeaderIndex(this.dragHd);
+
+        this.proxy.setX(this.hdX);
+        this.proxy.setWidth(x-this.hdX);
+
+        this.maxWidth = this.tree.outerCt.getWidth() - this.tree.innerBody.translatePoints(this.hdX).left;
+    },
+
+    onDrag : function(e){
+        var cursorX = this.tracker.getXY()[0];
+        this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));
+    },
+
+    onEnd : function(e){
+        var nw = this.proxy.getWidth(),
+            tree = this.tree;
+        
+        this.proxy.remove();
+        delete this.dragHd;
+        
+        tree.columns[this.hdIndex].width = nw;
+        tree.updateColumnWidths();
+        
+        setTimeout(function(){
+            tree.headersDisabled = false;
+        }, 100);
+    }
+});
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