I have the following code:
HTML + JavaScript
<style type="text/css">
.color1{
color: #3D8BD0;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<body>
<div id="mensagem">Mensage</div>
<script>
$("#mensagem").click(function( event ) {
printer.text('Hello');
});
</script>
</body>
And the .py file:
# -*- coding:utf-8 -*-
import sys
from PySide.QtCore import Slot, QObject, QUrl
from PySide.QtGui import QApplication
from PySide.QtWebKit import QWebView
from threading import Timer
class Dac(QObject):
def __init__(self, parent=None):
super(Dac, self).__init__(parent)
self.defultMsg = "default"
self.app = QApplication(sys.argv)
self.view = QWebView()
self.view.resize(445, 791)
self.view.load(QUrl("./page.html"))
self.frame = self.view.page().mainFrame()
self.frame.addToJavaScriptWindowObject('printer', self)
self.view.show()
self.app.exec_()
sys.exit(self.app.exec_())
def changeText(self, mensagem):
print mensagem
self.frame.evaluateJavaScript(mensagem)
@Slot(str)
def text(self, message):
print message
strm = '$("#mensagem").html("'+message+'").addClass("color1");'
self.changeText(strm) #this change the text
t = Timer(6.5, self.timeoff)
t.start()
def timeoff(self):
strm = '$("#mensagem").html("'+self.defultMsg+'").removeClass("color1");'
self.changeText(strm) #this don't change
print "debug"
dac = Dac()
When I run the Python file, the window opens and shows me the HTML page, then when I click in the div "mensagem" the text just changes one time.
So I think my problem is that the statement self.frame.evaluateJavaScript(mensagem) only works on the first time.
Is there anyone else with the same problem?
The callback you provide to
threading.Timerwill not be executed by the main thread. SinceQWebViewinherits fromQWidget, you have to interact with it from the main thread:You can fix this by using
PySide.QtCore.QTimerand replacing this code:With:
QTimerworks with Qt's event loop and therefore stays in the same thread.