Python如何使用Pyqt5實(shí)現(xiàn)簡(jiǎn)易瀏覽器

pip3 install QtWebEngineWidgets

# 創(chuàng)建瀏覽器，重寫(xiě)重寫(xiě)createwindow方法實(shí)現(xiàn)頁(yè)面連接的點(diǎn)擊跳轉(zhuǎn)
class WebEngineView(QWebEngineView):

  def __init__(self, mainwindow, parent=None):
    super(WebEngineView, self).__init__(parent)
    self.mainwindow = mainwindow

  # 重寫(xiě)createwindow()
  def createWindow(self, QWebEnginePage_WebWindowType):
    new_webview = WebEngineView(self.mainwindow)
    self.mainwindow.create_tab(new_webview)
    return new_webview

# -*- coding: utf-8 -*-
# @Author: dshj
# @Date : 2020/04/26

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWebEngineWidgets import QWebEngineView


# 創(chuàng)建主窗口
class MainWindow(QMainWindow):
  def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    # 設(shè)置窗口標(biāo)題
    self.setWindowTitle('簡(jiǎn)易瀏覽器')
    # 設(shè)置窗口大小900*600
    self.resize(1300, 700)
    self.show()

    # 創(chuàng)建tabwidget（多標(biāo)簽頁(yè)面）
    self.tabWidget = QTabWidget()
    self.tabWidget.setTabShape(QTabWidget.Triangular)
    self.tabWidget.setDocumentMode(True)
    self.tabWidget.setMovable(True)
    self.tabWidget.setTabsClosable(True)
    self.tabWidget.tabCloseRequested.connect(self.close_Tab)
    self.setCentralWidget(self.tabWidget)

    # 第一個(gè)tab頁(yè)面
    self.webview = WebEngineView(self) # self必須要有，是將主窗口作為參數(shù)，傳給瀏覽器
    self.webview.load(QUrl("http://www.baidu.com"))
    self.create_tab(self.webview)

    # 使用QToolBar創(chuàng)建導(dǎo)航欄，并使用QAction創(chuàng)建按鈕
    # 添加導(dǎo)航欄
    navigation_bar = QToolBar('Navigation')
    # 設(shè)定圖標(biāo)的大小
    navigation_bar.setIconSize(QSize(16, 16))
    # 添加導(dǎo)航欄到窗口中
    self.addToolBar(navigation_bar)

    # QAction類提供了抽象的用戶界面action，這些action可以被放置在窗口部件中
    # 添加前進(jìn)、后退、停止加載和刷新的按鈕
    back_button = QAction(QIcon('icons/houtui.png'), 'Back', self)
    next_button = QAction(QIcon('icons/qianjin.png'), 'Forward', self)
    stop_button = QAction(QIcon('icons/close.png'), 'stop', self)
    reload_button = QAction(QIcon('icons/shuaxin.png'), 'reload', self)

    # 綁定事件
    back_button.triggered.connect(self.webview.back)
    next_button.triggered.connect(self.webview.forward)
    stop_button.triggered.connect(self.webview.stop)
    reload_button.triggered.connect(self.webview.reload)

    # 將按鈕添加到導(dǎo)航欄上
    navigation_bar.addAction(back_button)
    navigation_bar.addAction(next_button)
    navigation_bar.addAction(stop_button)
    navigation_bar.addAction(reload_button)

    # 添加URL地址欄
    self.urlbar = QLineEdit()
    # 讓地址欄能響應(yīng)回車(chē)按鍵信號(hào)
    self.urlbar.returnPressed.connect(self.navigate_to_url)

    navigation_bar.addSeparator()
    navigation_bar.addWidget(self.urlbar)

    # 讓瀏覽器相應(yīng)url地址的變化
    self.webview.urlChanged.connect(self.renew_urlbar)

  # 顯示地址
  def navigate_to_url(self):
    q = QUrl(self.urlbar.text())
    if q.scheme() == '':
      q.setScheme('http')
    self.webview.setUrl(q)

  # 響應(yīng)輸入的地址
  def renew_urlbar(self, q):
    # 將當(dāng)前網(wǎng)頁(yè)的鏈接更新到地址欄
    self.urlbar.setText(q.toString())
    self.urlbar.setCursorPosition(0)

  # 創(chuàng)建tab頁(yè)面
  def create_tab(self, webview):
    self.tab = QWidget()
    self.tabWidget.addTab(self.tab, "新建頁(yè)面")
    self.tabWidget.setCurrentWidget(self.tab)

    # 渲染到頁(yè)面
    self.Layout = QHBoxLayout(self.tab)
    self.Layout.setContentsMargins(0, 0, 0, 0)
    self.Layout.addWidget(webview)

  # 關(guān)閉tab頁(yè)面
  def close_Tab(self, index):
    if self.tabWidget.count() > 1:
      self.tabWidget.removeTab(index)
    else:
      self.close() # 當(dāng)只有1個(gè)tab時(shí)，關(guān)閉主窗口


# 創(chuàng)建瀏覽器，重寫(xiě)重寫(xiě)createwindow方法實(shí)現(xiàn)頁(yè)面連接的點(diǎn)擊跳轉(zhuǎn)
class WebEngineView(QWebEngineView):

  def __init__(self, mainwindow, parent=None):
    super(WebEngineView, self).__init__(parent)
    self.mainwindow = mainwindow

  # 重寫(xiě)createwindow()
  def createWindow(self, QWebEnginePage_WebWindowType):
    new_webview = WebEngineView(self.mainwindow)
    self.mainwindow.create_tab(new_webview)
    return new_webview


# 程序入口
if __name__ == "__main__":
  app = QApplication(sys.argv)
  # 創(chuàng)建主窗口
  browser = MainWindow()
  browser.show()
  # 運(yùn)行應(yīng)用，并監(jiān)聽(tīng)事件
  sys.exit(app.exec_())