pyqt 发射接收信号

翻页控件：

一、定义并发射信号：

 #!/usr/bin/python
 # #coding=utf-8
 # __author__=''

 from PyQt4.QtCore import *
 from PyQt4.QtGui import *

 import pageItem_ui

 class pageItem(QWidget):
     # 定义信号
     emit_page_changed = pyqtSignal(int, int)

     def __init__(self, parent=None):
         QWidget.__init__(self, parent)
         self.ui = pageItem_ui.Ui_Form()

         self.page_num = 1
         self.page_rows = 50
         self.total_page = 0
         self.init_ui()
         self.init_ui_data()

     def init_ui(self):
         self.setObjectName('pageItem')
         self.ui.setupUi(self)
         self.setStyleSheet("QComboBox QAbstractItemView::item{height:25px;}")
         self.ui.comboBox_show_page_num.setView(QListView())

         regExp = QRegExp('^[1-9][0-9]*$')
         self.ui.comboBox_show_page_num.setValidator(QIntValidator(1, 999, self))
         self.ui.lineEdit_jump_page.setValidator(QRegExpValidator(regExp, self))

         self.connect(self.ui.pushButton_jump, SIGNAL('clicked()'), self.slot_pushButton_jump_clicked)
         self.connect(self.ui.pushButton_per_page, SIGNAL('clicked()'), self.slot_pushButton_per_clicked)
         self.connect(self.ui.pushButton_next_page, SIGNAL('clicked()'), self.slot_pushButton_next_clicked)

     def init_ui_data(self):
         self.setPageNum(1)

     def slot_pushButton_jump_clicked(self):
         # 获取跳转数据
         try:
             page_jump_num = self.ui.lineEdit_jump_page.text().toInt()[0]
             if page_jump_num > self.total_page or page_jump_num < 1:
                 return
             self.setPageNum(page_jump_num)
             self.emit_page_changed.emit(self.pageRows(), self.pageNum())
         except Exception,e:
             print str(e)

     def slot_pushButton_per_clicked(self):
         '''
         上一页
         :return:
         '''

         pageNum = self.pageNum() - 1

         if pageNum < 0:
             return

         self.setPageNum(pageNum)

         self.emit_page_changed.emit(self.pageRows(), self.pageNum())

     def slot_pushButton_next_clicked(self):
         '''
         下一页
         :return:
         '''
         pageNum = self.pageNum() + 1
         if pageNum > self.total_page:
             return
         self.setPageNum(pageNum)

         self.emit_page_changed.emit(self.pageRows(), self.pageNum())

     def pageRows(self):
         '''
         获取当前每页显示行数
         :return 行数:
         '''
         pageRows = self.ui.comboBox_show_page_num.currentText().toInt()[0]
         if pageRows <= 0:
             pageRows = 50
         self.page_rows = pageRows
         return pageRows

     def pageNum(self):
         '''
         获取当前显示页数
         :return:
         '''
         return self.page_num

     def setPageNum(self, pageNum):
         '''
         设置页数
         :param pageNum:
         :return:
         '''
         if pageNum <= 0:
             pageNum = 1
         self.page_num = pageNum
         self.ui.lineEdit_jump_page.setText(QString.number(pageNum))

     def setTotalRows(self, total):
         '''
         设置总行数
         :param total:
         :return:
         '''

         if total < 0:
             total = 0

         pagetotal = total/self.page_rows
         if (total%self.page_rows) != 0:
             pagetotal += 1

         self.total_page = pagetotal

         strPageNum = QString.number(pagetotal)
         self.ui.label_total_page_num.setText(strPageNum)
 if __name__ == '__main__':
     print QString.number(1888)

一、接收信号：

# 接收信号
self.ui.widget_page.emit_page_changed.connect(self.slot_pageChanged)
self.ui.widget_list_page.emit_page_changed.connect(self.slot_list_pageChanged)