def __init__(self, parent=None):
QWidget.__init__(self, parent)
self.l = l = QVBoxLayout(self)
self.view = v = QWebEngineView(self)
v.loadStarted.connect(self.load_started)
v.loadProgress.connect(self.load_progress)
v.loadFinished.connect(self.load_finished)
l.addWidget(v)
self.h = h = QHBoxLayout()
l.addLayout(h)
self.download_progress = d = DownloadProgress(self)
h.addWidget(d)
self.home_button = b = QPushButton(_('Home'))
b.clicked.connect(self.home)
h.addWidget(b)
self.back_button = b = QPushButton(_('Back'))
b.clicked.connect(v.back)
h.addWidget(b)
self.forward_button = b = QPushButton(_('Forward'))
b.clicked.connect(v.forward)
h.addWidget(b)
self.progress_bar = b = QProgressBar(self)
h.addWidget(b)
self.reload_button = b = QPushButton(_('Reload'))
b.clicked.connect(v.reload)
h.addWidget(b)
def main(url):
# This function is run in a separate process and can do anything it likes,
# including use QWebEngine. Here it simply opens the passed in URL
# in a QWebEngineView
app = Application([])
w = QWebEngineView()
w.setUrl(QUrl(url))
w.show()
w.raise_()
app.exec_()
def show_devtools(self):
if not hasattr(self, '_devtools_page'):
self._devtools_page = QWebEnginePage()
self._devtools_view = QWebEngineView(self)
self._devtools_view.setPage(self._devtools_page)
self._page.setDevToolsPage(self._devtools_page)
self._devtools_dialog = d = QDialog(self)
d.setWindowTitle('Inspect Lookup page')
v = QVBoxLayout(d)
v.addWidget(self._devtools_view)
d.bb = QDialogButtonBox(QDialogButtonBox.StandardButton.Close)
d.bb.rejected.connect(d.reject)
v.addWidget(d.bb)
d.resize(QSize(800, 600))
d.setAttribute(Qt.WidgetAttribute.WA_DeleteOnClose, False)
self._devtools_dialog.show()
self._page.triggerAction(QWebEnginePage.WebAction.InspectElement)
prints(self.webengine_crash_message)
if self._last_reload_at is not None and monotonic() - self._last_reload_at < 2:
self.render_process_failed.emit()
prints('The Qt WebEngine Render process crashed too often')
else:
self._last_reload_at = monotonic()
self.render_process_restarted.emit()
prints('Restarting Qt WebEngine')
if __name__ == '__main__':
from calibre.gui2 import Application
from calibre.gui2.tweak_book.preview import WebPage
from qt.core import QMainWindow
app = Application([])
view = QWebEngineView()
page = WebPage(view)
view.setPage(page)
w = QMainWindow()
w.setCentralWidget(view)
class Test(Bridge):
s1 = from_js(object)
j1 = to_js()
t = Test(view.page())
t.s1.connect(print)
w.show()
view.setHtml('''
<p>hello</p>
''')
app.exec()
def visibility_changed(self, visible):
if visible and self.view is None:
self.view = QWebEngineView(self.view_to_debug)
self.view_to_debug.page().setDevToolsPage(self.view.page())
self.layout.addWidget(self.view)