From 86ac112844d0e7723c9aa930ff93e7db70bd93e1 Mon Sep 17 00:00:00 2001
From: Catouse <catouse@gmail.com>
Date: Wed, 2 Jul 2014 15:10:06 +0800
Subject: [PATCH]  + added draggable.js.

---
 src/js/draggable.js | 93 +++++++++++++++++++++++++++++++++++++++++++++
 src/js/zui.js       |  1 +
 2 files changed, 94 insertions(+)
 create mode 100644 src/js/draggable.js

diff --git a/src/js/draggable.js b/src/js/draggable.js
new file mode 100644
index 000000000..b4773c1ed
--- /dev/null
+++ b/src/js/draggable.js
@@ -0,0 +1,93 @@
+/* Draggable */
++function($, window, document, Math)
+{
+    "use strict";
+
+    var Draggable = function(element, options)
+    {
+        this.$         = $(element);
+        this.options   = this.getOptions(options);
+
+        this.init();
+    };
+
+    Draggable.DEFAULTS = {container: 'body'};
+
+    Draggable.prototype.getOptions = function (options)
+    {
+        options = $.extend({}, Draggable.DEFAULTS, this.$.data(), options);
+        return options;
+    };
+
+    Draggable.prototype.init = function()
+    {
+        this.handleMouseEvents();
+    }
+
+    Draggable.prototype.handleMouseEvents = function()
+    {
+        var $e      = this.$,
+            setting = this.options;
+
+        $e.mousedown(function(event)
+        {
+            if(setting.hasOwnProperty('before') && $.isFunction(setting['before']))
+            {
+                var isSure = setting['before']({event: event, element: $e});
+                if (isSure != undefined && (!isSure)) return;
+            }
+
+            var $container = $(setting.container),
+                pos = $e.offset();
+            var cPos = $container.offset(),
+                startOffset = {x: event.pageX - pos.left + cPos.left, y: event.pageY - pos.top + cPos.top};
+
+            $e.addClass('drag-ready');
+            $(document).bind('mousemove',mouseMove).bind('mouseup',mouseUp);
+            event.preventDefault();
+
+            function mouseMove(event)
+            {
+                var mX = event.pageX,
+                    mY = event.pageY;
+                var dragPos = {left: mX-startOffset.x, top: mY-startOffset.y};
+                    
+                $e.removeClass('drag-ready').addClass('dragging').css(dragPos);
+                
+                if(setting.hasOwnProperty('drag') && $.isFunction(setting['drag']))
+                {
+                    setting['drag']({event: event, element: $e, startOffset: startOffset, pos: dragPos});
+                }
+            }
+
+            function mouseUp(event)
+            {
+                var endPos = {left: event.pageX - startOffset.x, top: event.pageY - startOffset.y};
+                $e.css(endPos).removeClass('dragging');
+
+                $(document).unbind('mousemove', mouseMove).unbind('mouseup', mouseUp);
+                if(setting.hasOwnProperty('finish') && $.isFunction(setting['finish']))
+                {
+                    setting['finish']({event: event, target: target, element: $e, pos: endPos);
+                }
+                event.preventDefault();
+            }
+        });
+    }
+
+    $.fn.draggable = function(option)
+    {
+        return this.each(function()
+        {
+            var $this   = $(this);
+            var data    = $this.data('zui.draggable');
+            var options = typeof option == 'object' && option;
+
+            if (!data) $this.data('zui.draggable', (data = new Draggable(this, options)));
+
+            if (typeof option == 'string') data[option]();
+        })
+    };
+
+    $.fn.draggable.Constructor = Draggable;
+}(jQuery,window,document,Math);
diff --git a/src/js/zui.js b/src/js/zui.js
index 55845163c..35a27577c 100644
--- a/src/js/zui.js
+++ b/src/js/zui.js
@@ -22,6 +22,7 @@ if (typeof jQuery === "undefined") { throw new Error("ZUI requires jQuery") }
 // @koala-append "tab.js"
 // @koala-append "image.ready.js"
 // @koala-append "lightbox.js"
+// @koala-append "draggable.js"
 // @koala-append "droppable.js"
 // @koala-append "dashboard.js"
 // @koala-append "menu.js"
-- 
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