我正在使用带有PyQt5和Python 3.6的QWebEngineView小部件。 页面加载时,我想显示进度。出于演示目的,我仅使用打印语句来完成此操作(以后,我想让进度条小部件出现,显示进度并在完成后消失)。
我已连接到loadStarted,loadProgress,loadFinished事件。
代码如下所示( self.browser 是QWebEngineView小部件):
def loadStartedHandler(self):
print(time.time(), ": load started")
def loadProgressHandler(self, prog):
print(time.time(), ":load progress", prog)
def loadFinishedHandler(self):
print(time.time(), ": load finished")
# ....
self.browser.loadStarted.connect(lambda: self.loadStartedHandler())
self.browser.loadProgress.connect(lambda: self.loadProgressHandler(42))
self.browser.loadFinished.connect(lambda: self.loadFinishedHandler())
当然,现在我希望获取loadProgress事件的实际进度值,而不是数字42。我怎么得到这个?
对不起,如果这个问题很愚蠢。我是一个新手,只是无法从C ++文档将其转换为Python。 (不幸的是,我找不到Qt的像样的Python文档。)
答案 0 :(得分:2)
不必传递Lambda,您可以使用new connection syntax直接将其连接:
def loadStartedHandler(self):
print(time.time(), ": load started")
def loadProgressHandler(self, prog):
print(time.time(), ":load progress", prog)
def loadFinishedHandler(self):
print(time.time(), ": load finished")
....
self.browser.loadStarted.connect(self.loadStartedHandler)
self.browser.loadProgress.connect(self.loadProgressHandler)
self.browser.loadFinished.connect(self.loadFinishedHandler)
示例:
import sys
import time
from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets
class Widget(QtWidgets.QWidget):
def __init__(self):
super(Widget, self).__init__()
lay = QtWidgets.QVBoxLayout(self)
self.browser = QtWebEngineWidgets.QWebEngineView()
lay.addWidget(self.browser)
self.browser.setUrl(QtCore.QUrl("https://www.google.com"))
self.browser.loadStarted.connect(self.loadStartedHandler)
self.browser.loadProgress.connect(self.loadProgressHandler)
self.browser.loadFinished.connect(self.loadFinishedHandler)
@QtCore.pyqtSlot()
def loadStartedHandler(self):
print(time.time(), ": load started")
@QtCore.pyqtSlot(int)
def loadProgressHandler(self, prog):
print(time.time(), ":load progress", prog)
@QtCore.pyqtSlot()
def loadFinishedHandler(self):
print(time.time(), ": load finished")
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
view = Widget()
view.show()
sys.exit(app.exec_())