I'm trying to use a QPushButton to call a function that opens a new instance of QWebView. Works but as soon as the window opens it closes again. I've read this - PyQt window closes immediately after opening but I don't understand how to reference the window to keep it open.
import sys
from PyQt4 import QtCore, QtGui, QtWebKit
from PyQt4.QtWebKit import QWebSettings
from PyQt4.QtNetwork import QNetworkAccessManager
from PyQt4.QtNetwork import *
UA_STRING = """Test Test Test"""
vidurl = ("empty")
def web1():
class YWebPage(QtWebKit.QWebPage):
def __init__(self):
super(QtWebKit.QWebPage, self).__init__()
def userAgentForUrl(self, url):
return UA_STRING
class Browser(QtGui.QMainWindow): # "Browser" window
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.resize(800,600) # Viewport size
self.centralwidget = QtGui.QWidget(self)
self.html = QtWebKit.QWebView()
def browse(self):
self.webView = QtWebKit.QWebView()
self.yPage = YWebPage()
self.webView.setPage(self.yPage)
self.webView.load(QtCore.QUrl(vidurl)) # Video URL
self.webView.settings().setAttribute(QtWebKit.QWebSettings.PluginsEnabled,True) # Enables flash player
self.webView.show()
x = Browser()
# QNetworkProxy.setApplicationProxy(QNetworkProxy(QNetworkProxy.HttpProxy, "proxy.example.com", 8080)) # Proxy setting
x.browse()
def main(): # Dialog window
app = QtGui.QApplication(sys.argv)
w = QtGui.QWidget()
w.resize(200, 450)
w.setFixedSize(200, 350)
w.move(300, 300)
w.setWindowTitle('U-bot 0.1')
# Setup GUI
# Start Button
w.__button = QtGui.QPushButton(w)
w.__button.clicked.connect(lambda: web1())
# Text area
w.__qle = QtGui.QLineEdit(w)
w.__qle.setText ("http://")
vidurl = w.__qle.text # Get video url from user
# Images
pixmap1 = QtGui.QPixmap("ubot.png")
lbl1 = QtGui.QLabel(w)
lbl1.resize(200, 150)
lbl1.setPixmap(pixmap1)
lbl1.setScaledContents(True)
w.__button.setText('Start')
layout = QtGui.QVBoxLayout()
layout.addStretch(1)
layout.addWidget(w.__qle)
layout.addWidget(w.__button)
w.setLayout(layout)
w.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
app.exec_()
To keep a reference to a QObject, you can either keep the variable in scope, or add it as the child of another QObject which variable already stays in scope.
And for QWidget, the parent should also be a QWidget, so, in your case, you'd want to make w as the parent of all your QMainWindows.
def web1(parent):
...
class Browser(QtGui.QMainWindow): # "Browser" window
def __init__(self, parent):
QtGui.QMainWindow.__init__(self, parent)
...
def main():
...
w.__button.clicked.connect(lambda: web1(w))
This also avoid maintaining manually a list of opened windows, since the object hierarchy can do that for you.
PS: The child windows are shown as toplevel windows and not inside the w window, because QMainWindow (and QDialog) has the Qt::Window flag set by default.
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