/*
弹出窗口定位到浏览器中间
1. show(options{
height:高度
width:宽度
speed:渐显时间 默认0
container:包含的html内容的jquery对象
model:是否是模态窗口，默认true，模态对话框就是在弹层下面在覆盖遮罩层，参考上篇文章Overlay实现
})
2. close(speed:淡出时间 默认0)
*/
Q.Panel = function() {
var self = this;
self._resetPosition = function() {
self._container.css("top", self._getTop());
self._container.css("left", self._getLeft());
};
self._getTop = function() {
return Q.bom.scrollY() + (Q.bom.windowHeight() - self._options.height) / 2;
};
self._getLeft = function() {
return (Q.dom.pageWidth() - self._options.width) / 2;
};
self.show = function(options) {
self._options = $.extend({
width: 350,
height: 200,
opacity: 0.5,
model: true,
speed: 0
}, options || {});
self._container = self._options.container;
var css = {
'width': self._options.width,
'height': self._options.height,
'z-index': Q.Overlay.zindex,
'position': 'absolute',
'left': self._getLeft(),
'top': self._getTop(),
'display': 'none'
};
self._container.css(css);
if (self._options.model) {
self._overlay = new Q.Overlay(self._options.opacity);
self._overlay.show();
}
$(window).scroll(self._resetPosition);
$(window).resize(self._resetPosition);
$(document.body).append(self._container);
self._container.fadeIn(self._options.speed);
Q.Overlay.zindex++; //没弹出一次就递增，防止多个弹层重叠
};
self.close = function(speed) {
$(window).unbind('resize', self._resetPosition);
$(window).unbind('scroll', self._resetPosition);
self._container.fadeOut(speed || 0, function() {
self._container.remove();
if (self._options.model) {
self._overlay.close();
}
});
};
};