self.connect(self.treeWidget_base, QtCore.SIGNAL('itemClicked(QTreeWidgetItem*, int)'), self.onClick)
def onClick(self):
# print self.treeWidget_base.currentItem().text(0)
if self.treeWidget_base.currentItem().text(0) == u'说明':
# #说明窗口textBrowser_1提升在最在前面
self.textBrowser_1.raise_()