Python-сообщество

# -*- coding: utf-8 -*-
import sys

from PyQt4 import QtCore, QtGui
from httpWidget import Ui_HttpWidget

class httpWidget(QtGui.QWidget):
	def __init__(self, parent=None):
		super(httpWidget, self).__init__(parent)
		self.ui = Ui_HttpWidget()
		self.ui.setupUi(self)
		
		# set margins
		l = self.layout()
		l.setMargin(0)
		self.ui.horizontalLayout.setMargin(5)
		
		# set the default page
		url = 'http://google.pl'
		self.ui.url.setText(url)
		
		# load page
		self.ui.webView.setUrl(QtCore.QUrl(url))
		
		# history buttons:
		self.ui.back.setEnabled(False)
		self.ui.next.setEnabled(False)
		
		QtCore.QObject.connect(self.ui.back,QtCore.SIGNAL("clicked()"), self.back)
		QtCore.QObject.connect(self.ui.next,QtCore.SIGNAL("clicked()"), self.next)
		QtCore.QObject.connect(self.ui.url,QtCore.SIGNAL("returnPressed()"), self.url_changed)
		QtCore.QObject.connect(self.ui.webView,QtCore.SIGNAL("linkClicked (const QUrl&)"), self.link_clicked)
		QtCore.QObject.connect(self.ui.webView,QtCore.SIGNAL("urlChanged (const QUrl&)"), self.link_clicked)
		QtCore.QObject.connect(self.ui.webView,QtCore.SIGNAL("loadProgress (int)"), self.load_progress)
		QtCore.QObject.connect(self.ui.webView,QtCore.SIGNAL("titleChanged (const QString&)"), self.title_changed)
		QtCore.QObject.connect(self.ui.reload,QtCore.SIGNAL("clicked()"), self.reload_page)
		QtCore.QObject.connect(self.ui.stop,QtCore.SIGNAL("clicked()"), self.stop_page)
		
		QtCore.QMetaObject.connectSlotsByName(self)
	
	def url_changed(self):
		"""
		Url have been changed by user
		"""
		page = self.ui.webView.page()
		history = page.history()
		if history.canGoBack():
			self.ui.back.setEnabled(True)
		else:
			self.ui.back.setEnabled(False)
		if history.canGoForward():
			self.ui.next.setEnabled(True)
		else:
			self.ui.next.setEnabled(False)
		
		url = self.ui.url.text()
		self.ui.webView.setUrl(QtCore.QUrl(url))
		
	def stop_page(self):
		"""
		Stop loading the page
		"""
		self.ui.webView.stop()
	
	def title_changed(self, title):
		"""
		Web page title changed - change the tab name
		"""
		self.setWindowTitle(title)
	
	def reload_page(self):
		"""
		Reload the web page
		"""
		self.ui.webView.setUrl(QtCore.QUrl(self.ui.url.text()))
	
	def link_clicked(self, url):
		"""
		Update the URL if a link on a web page is clicked
		"""
		page = self.ui.webView.page()
		history = page.history()
		if history.canGoBack():
			self.ui.back.setEnabled(True)
		else:
			self.ui.back.setEnabled(False)
		if history.canGoForward():
			self.ui.next.setEnabled(True)
		else:
			self.ui.next.setEnabled(False)
		
		self.ui.url.setText(url.toString())
	
	def load_progress(self, load):
		"""
		Page load progress
		"""
		if load == 100:
			self.ui.stop.setEnabled(False)
		else:
			self.ui.stop.setEnabled(True)
		
	def back(self):
		"""
		Back button clicked, go one page back
		"""
		page = self.ui.webView.page()
		history = page.history()
		history.back()
		if history.canGoBack():
			self.ui.back.setEnabled(True)
		else:
			self.ui.back.setEnabled(False)
	
	def next(self):
		"""
		Next button clicked, go to next page
		"""
		page = self.ui.webView.page()
		history = page.history()
		history.forward()
		if history.canGoForward():
			self.ui.next.setEnabled(True)
		else:
			self.ui.next.setEnabled(False)

if __name__ == "__main__":
	app = QtGui.QApplication(sys.argv)
	myapp = httpWidget()
	myapp.show()
	sys.exit(app.exec_())