如何使用 target=“_blank"打开超链接在 PyQtWebEngine 中?

2022-01-12 00:00:00 python pyqt5 qwebengineview qtwebengine

问题描述

我使用 pyqt5 和 PyQtWebEngine 制作了一个 Web 浏览器.它工作正常，但是当我单击带有 target=_blank"的超链接时那么它不起作用，但我将如何解决它.您可以通过点击此链接查看其源代码 https://github.com/SaptakBhoumik/WebPlus.请检查我的代码并告诉我该怎么做

I have made a web browser using pyqt5 and PyQtWebEngine.It works fine but when I click on a hyperlink with target="_blank" then it does not work but how will I fix it. You can view its source code by clicking on this link https://github.com/SaptakBhoumik/WebPlus . Please review my code and tell me what to do

解决方案

如 文档:

_blank:通常是一个新标签页，但用户可以配置浏览器打开一个新窗口.

_blank: usually a new tab, but users can configure browsers to open a new window instead.

也就是说，目标不是重新加载页面，而是创建一个新选项卡，然后为了获得该请求，您必须重写 QWebEngineView(或 QWebEnginePage)的 createWindow 方法:

That is, the objective is not to reload the page but to create a new tab, and then to obtain that request you must override the createWindow method of QWebEngineView (or QWebEnginePage):

from functools import cached_property
import sys


from PyQt5 import QtCore, QtGui, QtWidgets, QtWebEngineWidgets


class WebView(QtWebEngineWidgets.QWebEngineView):
    def createWindow(self, type_):
        if not isinstance(self.window(), Browser):
            return

        if type_ == QtWebEngineWidgets.QWebEnginePage.WebBrowserTab:
            return self.window().tab_widget.create_tab()


class TabWidget(QtWidgets.QTabWidget):
    def create_tab(self):
        view = WebView()

        index = self.addTab(view, "(Untitled)")
        self.setTabIcon(index, view.icon())
        view.titleChanged.connect(
            lambda title, view=view: self.update_title(view, title)
        )
        view.iconChanged.connect(lambda icon, view=view: self.update_icon(view, icon))
        self.setCurrentWidget(view)
        return view

    def update_title(self, view, title):
        index = self.indexOf(view)
        self.setTabText(index, title)

    def update_icon(self, view, icon):
        index = self.indexOf(view)
        self.setTabIcon(index, icon)


class Browser(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setCentralWidget(self.tab_widget)

        view = self.tab_widget.create_tab()
        view.load(
            QtCore.QUrl(
                "https://www.w3schools.com/tags/tryit.asp?filename=tryhtml_a_target"
            )
        )

    @cached_property
    def tab_widget(self):
        return TabWidget()


def main():
    app = QtWidgets.QApplication(sys.argv)
    w = Browser()
    w.show()
    sys.exit(app.exec_())


if __name__ == "__main__":
    main()

注意:建议您查看官方示例:WebEngine Widgets 简单浏览器示例，以及在 PySide2 很容易翻译成 PyQt5 实现了这个功能和更多功能.

Note: I recommend that you review the official example: WebEngine Widgets Simple Browser Example, in addition to its implementation in PySide2 which is easily translatable to PyQt5 where this feature and many more are implemented.

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