[PyQt] A Hopefully Silly Question from a Beginner

[Ryan Hanson]

On Mon, Sep 16, 2013 at 10:19 AM, Patrick Barrett <patrick at mkii.org> wrote:

> I'm trying to write a small app the generates a few QWebView windows and
> then rotates the page that is displayed on a set interval.
>
> Code: https://gist.github.com/Azdle/**6556433<https://gist.github.com/Azdle/6556433>
>
> I've run into an issue that I don't understand. When I try to generate a
> `PageWindow` (Class based on QWebView) from within my `MainWindow` class
> nothing appears. (See the code in 29-30) However, when I copy and paste
> that code outside of any classes the window appears as it should. (See the
> commented code in 56-57)
>
> Even when I can make the QWebView window appear, the QTimer object that I
> create in the `PageWindow` never seems to timeout. I think this is being
> caused by the same issue as the first problem.
>
> I'm not sure if the issues are me doing the python wrong or just not
> understanding something about how the Qt-specfic aspects work. I have this
> application already working in C++, but want to get it working in Python.
>
> Thanks
> --Patrick
>
>
Here you go Patrick, you want to move your timer into your main class and
then call your new page function on the instance of PageWindow that you
create inside that class.

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtWebKit import *

pages = [
      "https://portals.exosite.com/views/3819798770/3579834479",
      "https://portals.exosite.com/views/2562112089/4128069106",
      "https://portals.exosite.com/views/2060811893/1760385000",
      "https://exosite:AKYQhkDqj4@logs.exosite.com:444"
]

class MainWindow(QMainWindow):

    def __init__(self, *args):
        QMainWindow.__init__(self)

        self.quitButton = QPushButton("Quit")
        vbox = QVBoxLayout()
        vbox.addWidget(self.quitButton)
        centralWidget = QWidget()
        centralWidget.setLayout(vbox)
        self.setCentralWidget(centralWidget)

        self.quitButton.clicked.connect(self.close)

        self.pageView = PageWindow()
        self.pageView.show()

        self.pageTimer = QTimer()
        self.pageTimer.timeout.connect(self.pageView.nextPage)
        self.pageTimer.start(5000)

    def closeEvent(self, event):
        self.pageTimer.stop()
        self.pageView.close()
        event.accept()

class PageWindow(QWebView):
    def __init__(self):
        QWebView.__init__(self)

        self.pageIndex = 0
        self.nextPage()
        self.setGeometry(QApplication.desktop().screenGeometry(1))
        self.showFullScreen()

    def nextPage(self):
        print("Loading:"+pages[self.pageIndex])
        self.load(QUrl(pages[self.pageIndex]))
        self.pageIndex = self.pageIndex + 1
        if self.pageIndex >= len(pages):
            self.pageIndex = 0

def main(args):
    app = QApplication(args)
    win = MainWindow()
    win.show()
    app.connect(app, SIGNAL("lastWindowClosed()"),
                app, SLOT("quit()"))
    app.exec_()

if __name__=="__main__":
        main(sys.argv)
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