/* 何问起 hovertree.com */
(function($)   {   //code here   })(jQuery);   

/* 何问起 hovertree.com */
var defaultSettings = {   mode            : 'Pencil',   lineWidthMin    : '0',   lineWidthMax    : '10',   lineWidth       : '2'
};   settings = $.extend({}, defaultSettings, settings || {});   

$.fn.wPaint = function(settings)   {   return this.each(function()   {   var elem = $(this);   //run some code here    何问起 hovertree.com
    }
}   

var defaultSettings = {   mode            : 'Pencil',   lineWidthMin    : '0',   lineWidthMax    : '10',   lineWidth       : '2'
};   $.fn.wPaint = function(settings)
{   settings = $.extend({}, defaultSettings, settings || {});   return this.each(function()   {   var elem = $(this);   //run some code here 何问起 hovertree.com
     }
}   

/* 何问起 hovertree.com */
function Canvas(settings)
{   this.settings = settings;   this.draw = false;   this.canvas = null;         this.ctx = null;   return this;
}   

/* 何问起 hovertree.com */
Canvas.prototype =
{   generate: function()   {   //generate code
  }
}   

Canvas.prototype =
{   generate: function()   {   //some code   var $this = this;   var buton = //...some code
    button.click(function(){   //using this will not be found since it has it's own this   //use $this instead.
    $this.someFunc($this);   });   },   someFunc: function($this)   {   //won't know what "this" is.   //use $this instead passed from the click event
    }
}   /* 何问起 hovertree.com */

function Canvas(settings)
{   this.settings = settings;   return this;
}
/* 何问起 hovertree.com */

generate()
appendColors()
colorSelect()
colorHoverOn()
colorHoverOff()
appendToElement()
showPalette()
hidePalette()   

return this.each(function()
{   var elem = $(this);   var canvas = new Canvas(settings);   //run some code here
    elem.data("_wPaint_canvas", canvas);
}
//下面的代码明确了我们究竟要做什么：
$.fn.wPaint = function(option, settings)
{   if(typeof option === 'object')   {   settings = option;   }   else if(typeof option === 'string')   {   if(   this.data('_wPaint_canvas') &&   defaultSettings[option] !== undefined   ){   var canvas = this.data('_wPaint_canvas');   if(settings)   {   canvas.settings[option] = settings;   return true;   }   else  {   return canvas.settings[option];   }   }   else  return false;   }   return this.each(function()   {   //run some code here
    }
}   /* 何问起 hovertree.com */