Upgrade to ExtJS 3.0.0 - Released 07/06/2009

[extjs.git] / src / widgets / list / ColumnResizer.js

diff --git a/src/widgets/list/ColumnResizer.js b/src/widgets/list/ColumnResizer.js
new file mode 100644 (file)
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+++ b/src/widgets/list/ColumnResizer.js
@@ -0,0 +1,123 @@
+/*!
+ * Ext JS Library 3.0.0
+ * Copyright(c) 2006-2009 Ext JS, LLC
+ * licensing@extjs.com
+ * http://www.extjs.com/license
+ */
+/**\r
+ * @class Ext.ListView.ColumnResizer\r
+ * @extends Ext.util.Observable\r
+ * <p>Supporting Class for Ext.ListView.</p>\r
+ * @constructor\r
+ * @param {Object} config\r
+ */\r
+Ext.ListView.ColumnResizer = Ext.extend(Ext.util.Observable, {\r
+    /**\r
+     * @cfg {Number} minPct The minimum percentage to allot for any column (defaults to <tt>.05</tt>)\r
+     */\r
+    minPct: .05,\r
+\r
+    constructor: function(config){\r
+        Ext.apply(this, config);\r
+        Ext.ListView.ColumnResizer.superclass.constructor.call(this);\r
+    },\r
+    init : function(listView){\r
+        this.view = listView;\r
+        listView.on('render', this.initEvents, this);\r
+    },\r
+\r
+    initEvents : function(view){\r
+        view.mon(view.innerHd, 'mousemove', this.handleHdMove, this);\r
+        this.tracker = new Ext.dd.DragTracker({\r
+            onBeforeStart: this.onBeforeStart.createDelegate(this),\r
+            onStart: this.onStart.createDelegate(this),\r
+            onDrag: this.onDrag.createDelegate(this),\r
+            onEnd: this.onEnd.createDelegate(this),\r
+            tolerance: 3,\r
+            autoStart: 300\r
+        });\r
+        this.tracker.initEl(view.innerHd);\r
+        view.on('beforedestroy', this.tracker.destroy, this.tracker);\r
+    },\r
+\r
+    handleHdMove : function(e, t){\r
+        var hw = 5;\r
+        var x = e.getPageX();\r
+        var hd = e.getTarget('em', 3, true);\r
+        if(hd){\r
+            var r = hd.getRegion();\r
+            var ss = hd.dom.style;\r
+            var pn = hd.dom.parentNode;\r
+\r
+            if(x - r.left <= hw && pn != pn.parentNode.firstChild){\r
+                this.activeHd = Ext.get(pn.previousSibling.firstChild);\r
+                               ss.cursor = Ext.isWebKit ? 'e-resize' : 'col-resize';\r
+            } else if(r.right - x <= hw && pn != pn.parentNode.lastChild.previousSibling){\r
+                this.activeHd = hd;\r
+                               ss.cursor = Ext.isWebKit ? 'w-resize' : 'col-resize';\r
+            } else{\r
+                delete this.activeHd;\r
+                ss.cursor = '';\r
+            }\r
+        }\r
+    },\r
+\r
+    onBeforeStart : function(e){\r
+        this.dragHd = this.activeHd;\r
+        return !!this.dragHd;\r
+    },\r
+\r
+    onStart: function(e){\r
+        this.view.disableHeaders = true;\r
+        this.proxy = this.view.el.createChild({cls:'x-list-resizer'});\r
+        this.proxy.setHeight(this.view.el.getHeight());\r
+\r
+        var x = this.tracker.getXY()[0];\r
+        var w = this.view.innerHd.getWidth();\r
+\r
+        this.hdX = this.dragHd.getX();\r
+        this.hdIndex = this.view.findHeaderIndex(this.dragHd);\r
+\r
+        this.proxy.setX(this.hdX);\r
+        this.proxy.setWidth(x-this.hdX);\r
+\r
+        this.minWidth = w*this.minPct;\r
+        this.maxWidth = w - (this.minWidth*(this.view.columns.length-1-this.hdIndex));\r
+    },\r
+\r
+    onDrag: function(e){\r
+        var cursorX = this.tracker.getXY()[0];\r
+        this.proxy.setWidth((cursorX-this.hdX).constrain(this.minWidth, this.maxWidth));\r
+    },\r
+\r
+    onEnd: function(e){\r
+        var nw = this.proxy.getWidth();\r
+        this.proxy.remove();\r
+\r
+        var index = this.hdIndex;\r
+        var vw = this.view, cs = vw.columns, len = cs.length;\r
+        var w = this.view.innerHd.getWidth(), minPct = this.minPct * 100;\r
+\r
+        var pct = Math.ceil((nw*100) / w);\r
+        var diff = cs[index].width - pct;\r
+        var each = Math.floor(diff / (len-1-index));\r
+        var mod = diff - (each * (len-1-index));\r
+\r
+        for(var i = index+1; i < len; i++){\r
+            var cw = cs[i].width + each;\r
+            var ncw = Math.max(minPct, cw);\r
+            if(cw != ncw){\r
+                mod += cw - ncw;\r
+            }\r
+            cs[i].width = ncw;\r
+        }\r
+        cs[index].width = pct;\r
+        cs[index+1].width += mod;\r
+        delete this.dragHd;\r
+        this.view.setHdWidths();\r
+        this.view.refresh();\r
+        setTimeout(function(){\r
+            vw.disableHeaders = false;\r
+        }, 100);\r
+    }\r
+});
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