forked from openlp/openlp
84 lines
3.5 KiB
Python
84 lines
3.5 KiB
Python
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# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2017 OpenLP Developers #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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"""
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Subclass of QWebEngineView. Adds some special eventhandling needed for screenshots/previews
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Heavily inspired by https://stackoverflow.com/questions/33467776/qt-qwebengine-render-after-scrolling/33576100#33576100
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"""
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import logging
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from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets
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LOG_LEVELS = {
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QtWebEngineWidgets.QWebEnginePage.InfoMessageLevel: logging.INFO,
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QtWebEngineWidgets.QWebEnginePage.WarningMessageLevel: logging.WARNING,
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QtWebEngineWidgets.QWebEnginePage.ErrorMessageLevel: logging.ERROR
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}
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log = logging.getLogger(__name__)
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class WebEnginePage(QtWebEngineWidgets.QWebEnginePage):
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"""
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A custom WebEngine page to capture Javascript console logging
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"""
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def javaScriptConsoleMessage(self, level, message, line_number, source_id):
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"""
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Override the parent method in order to log the messages in OpenLP
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"""
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log.log(LOG_LEVELS[level], message)
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class WebEngineView(QtWebEngineWidgets.QWebEngineView):
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"""
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A sub-classed QWebEngineView to handle paint events of OpenGL
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"""
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_child = None # QtWidgets.QOpenGLWidget
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delegatePaint = QtCore.pyqtSignal()
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def __init__(self, parent=None):
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"""
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Constructor
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"""
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super(WebEngineView, self).__init__(parent)
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self.setPage(WebEnginePage(self))
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def eventFilter(self, obj, ev):
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"""
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Emit delegatePaint on paint event of the last added QOpenGLWidget child
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"""
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if obj == self._child and ev.type() == QtCore.QEvent.Paint:
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self.delegatePaint.emit()
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return super(WebEngineView, self).eventFilter(obj, ev)
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def event(self, ev):
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"""
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Handle events
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"""
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if ev.type() == QtCore.QEvent.ChildAdded:
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# Only use QOpenGLWidget child
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w = ev.child()
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if w and isinstance(w, QtWidgets.QOpenGLWidget):
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self._child = w
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w.installEventFilter(self)
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return super(WebEngineView, self).event(ev)
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