| 1 |
# -*- coding: utf-8 -*- |
| 2 |
# See the file "LICENSE" for the full license governing this code. |
| 3 |
import logging |
| 4 |
logger = logging.getLogger(__name__) |
| 5 |
logging.basicConfig(level=logging.DEBUG) |
| 6 |
|
| 7 |
from PySide import QtCore, QtWebKit |
| 8 |
|
| 9 |
|
| 10 |
class MxSignaler(QtCore.QObject): |
| 11 |
"""Signal-slot mechanism between WebViews and Python backend. |
| 12 |
|
| 13 |
This JavaScript object proxy is an alternative for QML, |
| 14 |
this works on at least Qt 4.6 and can evaluateJavaScript. |
| 15 |
This is slower that it ought to be. |
| 16 |
|
| 17 |
QML would provide a better and simpler mechanism, is *faster*, |
| 18 |
and the JavaScript console.log would be connected readily to stdout. |
| 19 |
What is missing is a way to inject JavaScript into QDeclarativeWebView. |
| 20 |
!!! It may exist but is undocumented !!! :] |
| 21 |
""" |
| 22 |
|
| 23 |
def __init__(self,webView): |
| 24 |
QtCore.QObject.__init__(self) |
| 25 |
self.webView = webView |
| 26 |
|
| 27 |
@QtCore.Slot() |
| 28 |
def addObjects(self): |
| 29 |
"""Injects the signaler into the mainFrame.""" |
| 30 |
logger.debug("adding JavaScript objects to page") |
| 31 |
page = self.webView.page() |
| 32 |
logger.debug(page) |
| 33 |
page.mainFrame().addToJavaScriptWindowObject("qml", self) |
| 34 |
|
| 35 |
# signal from remoteControl webView |
| 36 |
buttonPress = QtCore.Signal('QString') |
| 37 |
|
| 38 |
# slot for remoteControl webView |
| 39 |
@QtCore.Slot('QString') |
| 40 |
def selectState(self,state): |
| 41 |
"""Updates the remote control UI by calling "window.selectState(state)" function.""" |
| 42 |
logger.debug('select '+state) |
| 43 |
page = self.webView.page() |
| 44 |
page.mainFrame().evaluateJavaScript("window.selectState('%s');" % state) |
| 45 |
|
| 46 |
# slot for remoteControl webView |
| 47 |
@QtCore.Slot('QString') |
| 48 |
def unselectState(self,state): |
| 49 |
"""Updates the remote control UI by calling "window.selectState(state)" function.""" |
| 50 |
logger.debug('unselect '+state) |
| 51 |
page = self.webView.page() |
| 52 |
page.mainFrame().evaluateJavaScript("window.unselectState('%s');" % state) |
| 53 |
|
| 54 |
# slot for screen webView |
| 55 |
@QtCore.Slot('QString') |
| 56 |
def updateScreen(self,url): |
| 57 |
"""Updates the image url by calling "window.updateScreen(url)" function.""" |
| 58 |
logger.debug("updating screen with: "+url) |
| 59 |
page = self.webView.page() |
| 60 |
page.mainFrame().evaluateJavaScript("window.updateScreen('%s');" % url) |
