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openlp/openlp/core/ui/maindisplay.py

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# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
###############################################################################
# OpenLP - Open Source Lyrics Projection #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2016 OpenLP Developers #
# --------------------------------------------------------------------------- #
# This program is free software; you can redistribute it and/or modify it #
# under the terms of the GNU General Public License as published by the Free #
# Software Foundation; version 2 of the License. #
# #
# This program is distributed in the hope that it will be useful, but WITHOUT #
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
# more details. #
# #
# You should have received a copy of the GNU General Public License along #
# with this program; if not, write to the Free Software Foundation, Inc., 59 #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
###############################################################################
"""
The :mod:`maindisplay` module provides the functionality to display screens and play multimedia within OpenLP.
Some of the code for this form is based on the examples at:
* `http://www.steveheffernan.com/html5-video-player/demo-video-player.html`_
* `http://html5demos.com/two-videos`_
"""
import html
import logging
from PyQt5 import QtCore, QtWidgets, QtWebKit, QtWebKitWidgets, QtOpenGL, QtGui, QtMultimedia
from openlp.core.common import Registry, RegistryProperties, OpenLPMixin, Settings, translate, is_macosx, is_win
from openlp.core.lib import ServiceItem, ImageSource, ScreenList, build_html, expand_tags, image_to_byte
from openlp.core.lib.theme import BackgroundType
from openlp.core.ui import HideMode, AlertLocation
if is_macosx():
from ctypes import pythonapi, c_void_p, c_char_p, py_object
from sip import voidptr
from objc import objc_object
from AppKit import NSMainMenuWindowLevel, NSWindowCollectionBehaviorManaged
log = logging.getLogger(__name__)
OPAQUE_STYLESHEET = """
QWidget {
border: 0px;
margin: 0px;
padding: 0px;
}
QGraphicsView {}
"""
TRANSPARENT_STYLESHEET = """
QWidget {
border: 0px;
margin: 0px;
padding: 0px;
}
QGraphicsView {
background: transparent;
border: 0px;
}
"""
class Display(QtWidgets.QGraphicsView):
"""
This is a general display screen class. Here the general display settings will done. It will be used as
specialized classes by Main Display and Preview display.
"""
def __init__(self, parent):
"""
Constructor
"""
self.is_live = False
if hasattr(parent, 'is_live') and parent.is_live:
self.is_live = True
if self.is_live:
self.parent = lambda: parent
super(Display, self).__init__()
self.controller = parent
self.screen = {}
# FIXME: On Mac OS X (tested on 10.7) the display screen is corrupt with
# OpenGL. Only white blank screen is shown on the 2nd monitor all the
# time. We need to investigate more how to use OpenGL properly on Mac OS
# X.
if not is_macosx() and not is_win():
self.setViewport(QtOpenGL.QGLWidget())
def setup(self):
"""
Set up and build the screen base
"""
self.setGeometry(self.screen['size'])
self.web_view = QtWebKitWidgets.QWebView(self)
self.web_view.setGeometry(0, 0, self.screen['size'].width(), self.screen['size'].height())
self.web_view.settings().setAttribute(QtWebKit.QWebSettings.PluginsEnabled, True)
palette = self.web_view.palette()
palette.setBrush(QtGui.QPalette.Base, QtCore.Qt.transparent)
self.web_view.page().setPalette(palette)
self.web_view.setAttribute(QtCore.Qt.WA_OpaquePaintEvent, False)
self.page = self.web_view.page()
self.frame = self.page.mainFrame()
if self.is_live and log.getEffectiveLevel() == logging.DEBUG:
self.web_view.settings().setAttribute(QtWebKit.QWebSettings.DeveloperExtrasEnabled, True)
self.web_view.loadFinished.connect(self.is_web_loaded)
self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.frame.setScrollBarPolicy(QtCore.Qt.Vertical, QtCore.Qt.ScrollBarAlwaysOff)
self.frame.setScrollBarPolicy(QtCore.Qt.Horizontal, QtCore.Qt.ScrollBarAlwaysOff)
def resizeEvent(self, event):
"""
React to resizing of this display
:param event: The event to be handled
"""
if hasattr(self, 'web_view'):
self.web_view.setGeometry(0, 0, self.width(), self.height())
def is_web_loaded(self, field=None):
"""
Called by webView event to show display is fully loaded
"""
self.web_loaded = True
class MainDisplay(OpenLPMixin, Display, RegistryProperties):
"""
This is the display screen as a specialized class from the Display class
"""
def __init__(self, parent):
"""
Constructor
"""
super(MainDisplay, self).__init__(parent)
self.screens = ScreenList()
self.rebuild_css = False
self.hide_mode = None
self.override = {}
self.retranslateUi()
self.media_object = None
if self.is_live:
self.audio_player = AudioPlayer(self)
else:
self.audio_player = None
self.first_time = True
self.web_loaded = True
self.setStyleSheet(OPAQUE_STYLESHEET)
window_flags = QtCore.Qt.FramelessWindowHint | QtCore.Qt.Tool | QtCore.Qt.WindowStaysOnTopHint
if Settings().value('advanced/x11 bypass wm'):
window_flags |= QtCore.Qt.X11BypassWindowManagerHint
# TODO: The following combination of window_flags works correctly
# on Mac OS X. For next OpenLP version we should test it on other
# platforms. For OpenLP 2.0 keep it only for OS X to not cause any
# regressions on other platforms.
if is_macosx():
window_flags = QtCore.Qt.FramelessWindowHint | QtCore.Qt.Window
self.setWindowFlags(window_flags)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.set_transparency(False)
if is_macosx():
if self.is_live:
# Get a pointer to the underlying NSView
try:
nsview_pointer = self.winId().ascapsule()
except:
nsview_pointer = voidptr(self.winId()).ascapsule()
# Set PyCapsule name so pyobjc will accept it
pythonapi.PyCapsule_SetName.restype = c_void_p
pythonapi.PyCapsule_SetName.argtypes = [py_object, c_char_p]
pythonapi.PyCapsule_SetName(nsview_pointer, c_char_p(b"objc.__object__"))
# Covert the NSView pointer into a pyobjc NSView object
self.pyobjc_nsview = objc_object(cobject=nsview_pointer)
# Set the window level so that the MainDisplay is above the menu bar and dock
self.pyobjc_nsview.window().setLevel_(NSMainMenuWindowLevel + 2)
# Set the collection behavior so the window is visible when Mission Control is activated
self.pyobjc_nsview.window().setCollectionBehavior_(NSWindowCollectionBehaviorManaged)
if self.screens.current['primary']:
# Connect focusWindowChanged signal so we can change the window level when the display is not in
# focus on the primary screen
self.application.focusWindowChanged.connect(self.change_window_level)
if self.is_live:
Registry().register_function('live_display_hide', self.hide_display)
Registry().register_function('live_display_show', self.show_display)
Registry().register_function('update_display_css', self.css_changed)
self.close_display = False
def closeEvent(self, event):
"""
Catch the close event, and check that the close event is triggered by OpenLP closing the display.
On Windows this event can be triggered by pressing ALT+F4, which we want to ignore.
:param event: The triggered event
"""
if self.close_display:
super().closeEvent(event)
else:
event.ignore()
def close(self):
"""
Remove registered function on close.
"""
if self.is_live:
if is_macosx():
# Block signals so signal we are disconnecting can't get called while we disconnect it
self.blockSignals(True)
if self.screens.current['primary']:
self.application.focusWindowChanged.disconnect()
self.blockSignals(False)
Registry().remove_function('live_display_hide', self.hide_display)
Registry().remove_function('live_display_show', self.show_display)
Registry().remove_function('update_display_css', self.css_changed)
self.close_display = True
super().close()
def set_transparency(self, enabled):
"""
Set the transparency of the window
:param enabled: Is transparency enabled
"""
if enabled:
self.setAutoFillBackground(False)
self.setStyleSheet(TRANSPARENT_STYLESHEET)
else:
self.setAttribute(QtCore.Qt.WA_NoSystemBackground, False)
self.setStyleSheet(OPAQUE_STYLESHEET)
self.setAttribute(QtCore.Qt.WA_TranslucentBackground, enabled)
self.repaint()
def css_changed(self):
"""
We need to rebuild the CSS on the live display.
"""
for plugin in self.plugin_manager.plugins:
plugin.refresh_css(self.frame)
def retranslateUi(self):
"""
Setup the interface translation strings.
"""
self.setWindowTitle(translate('OpenLP.MainDisplay', 'OpenLP Display'))
def setup(self):
"""
Set up and build the output screen
"""
self.log_debug('Start MainDisplay setup (live = %s)' % self.is_live)
self.screen = self.screens.current
self.setVisible(False)
Display.setup(self)
if self.is_live:
# Build the initial frame.
background_color = QtGui.QColor()
background_color.setNamedColor(Settings().value('advanced/default color'))
if not background_color.isValid():
background_color = QtCore.Qt.white
image_file = Settings().value('advanced/default image')
splash_image = QtGui.QImage(image_file)
self.initial_fame = QtGui.QImage(
self.screen['size'].width(),
self.screen['size'].height(),
QtGui.QImage.Format_ARGB32_Premultiplied)
painter_image = QtGui.QPainter()
painter_image.begin(self.initial_fame)
painter_image.fillRect(self.initial_fame.rect(), background_color)
painter_image.drawImage(
(self.screen['size'].width() - splash_image.width()) // 2,
(self.screen['size'].height() - splash_image.height()) // 2,
splash_image)
service_item = ServiceItem()
service_item.bg_image_bytes = image_to_byte(self.initial_fame)
self.web_view.setHtml(build_html(service_item, self.screen, self.is_live, None,
plugins=self.plugin_manager.plugins))
self._hide_mouse()
def text(self, slide, animate=True):
"""
Add the slide text from slideController
:param slide: The slide text to be displayed
:param animate: Perform transitions if applicable when setting the text
"""
# Wait for the webview to update before displaying text.
while not self.web_loaded:
self.application.process_events()
self.setGeometry(self.screen['size'])
if animate:
self.frame.evaluateJavaScript('show_text("%s")' % slide.replace('\\', '\\\\').replace('\"', '\\\"'))
else:
# This exists for https://bugs.launchpad.net/openlp/+bug/1016843
# For unknown reasons if evaluateJavaScript is called
# from the themewizard, then it causes a crash on
# Windows if there are many items in the service to re-render.
# Setting the div elements direct seems to solve the issue
self.frame.findFirstElement("#lyricsmain").setInnerXml(slide)
def alert(self, text, location):
"""
Display an alert.
:param text: The text to be displayed.
:param location: Where on the screen is the text to be displayed
"""
# First we convert <>& marks to html variants, then apply
# formattingtags, finally we double all backslashes for JavaScript.
text_prepared = expand_tags(html.escape(text)).replace('\\', '\\\\').replace('\"', '\\\"')
if self.height() != self.screen['size'].height() or not self.isVisible():
shrink = True
js = 'show_alert("%s", "%s")' % (text_prepared, 'top')
else:
shrink = False
js = 'show_alert("%s", "")' % text_prepared
height = self.frame.evaluateJavaScript(js)
if shrink:
if text:
alert_height = int(height)
self.resize(self.width(), alert_height)
self.setVisible(True)
if location == AlertLocation.Middle:
self.move(self.screen['size'].left(), (self.screen['size'].height() - alert_height) // 2)
elif location == AlertLocation.Bottom:
self.move(self.screen['size'].left(), self.screen['size'].height() - alert_height)
else:
self.setVisible(False)
self.setGeometry(self.screen['size'])
def direct_image(self, path, background):
"""
API for replacement backgrounds so Images are added directly to cache.
:param path: Path to Image
:param background: The background color
"""
self.image_manager.add_image(path, ImageSource.ImagePlugin, background)
if not hasattr(self, 'service_item'):
return False
self.override['image'] = path
self.override['theme'] = self.service_item.theme_data.background_filename
self.image(path)
# Update the preview frame.
if self.is_live:
self.live_controller.update_preview()
return True
def image(self, path):
"""
Add an image as the background. The image has already been added to the
cache.
:param path: The path to the image to be displayed. **Note**, the path is only passed to identify the image.
If the image has changed it has to be re-added to the image manager.
"""
image = self.image_manager.get_image_bytes(path, ImageSource.ImagePlugin)
self.controller.media_controller.media_reset(self.controller)
self.display_image(image)
def display_image(self, image):
"""
Display an image, as is.
:param image: The image to be displayed
"""
self.setGeometry(self.screen['size'])
if image:
js = 'show_image("data:image/png;base64,%s");' % image
else:
js = 'show_image("");'
self.frame.evaluateJavaScript(js)
def reset_image(self):
"""
Reset the background image to the service item image. Used after the image plugin has changed the background.
"""
if hasattr(self, 'service_item'):
self.display_image(self.service_item.bg_image_bytes)
else:
self.display_image(None)
# Update the preview frame.
if self.is_live:
self.live_controller.update_preview()
# clear the cache
self.override = {}
def preview(self):
"""
Generates a preview of the image displayed.
"""
was_visible = self.isVisible()
self.application.process_events()
# We must have a service item to preview.
if self.is_live and hasattr(self, 'service_item'):
# Wait for the fade to finish before geting the preview.
# Important otherwise preview will have incorrect text if at all!
if self.service_item.theme_data and self.service_item.theme_data.display_slide_transition:
while not self.frame.evaluateJavaScript('show_text_completed()'):
self.application.process_events()
# Wait for the webview to update before getting the preview.
# Important otherwise first preview will miss the background !
while not self.web_loaded:
self.application.process_events()
# if was hidden keep it hidden
if self.is_live:
if self.hide_mode:
self.hide_display(self.hide_mode)
# Only continue if the visibility wasn't changed during method call.
elif was_visible == self.isVisible():
# Single screen active
if self.screens.display_count == 1:
# Only make visible if setting enabled.
if Settings().value('core/display on monitor'):
self.setVisible(True)
else:
self.setVisible(True)
return self.grab()
def build_html(self, service_item, image_path=''):
"""
Store the service_item and build the new HTML from it. Add the HTML to the display
:param service_item: The Service item to be used
:param image_path: Where the image resides.
"""
self.web_loaded = False
self.initial_fame = None
self.service_item = service_item
background = None
# We have an image override so keep the image till the theme changes.
if self.override:
# We have an video override so allow it to be stopped.
if 'video' in self.override:
Registry().execute('video_background_replaced')
self.override = {}
# We have a different theme.
elif self.override['theme'] != service_item.theme_data.background_filename:
Registry().execute('live_theme_changed')
self.override = {}
else:
# replace the background
background = self.image_manager.get_image_bytes(self.override['image'], ImageSource.ImagePlugin)
self.set_transparency(self.service_item.theme_data.background_type ==
BackgroundType.to_string(BackgroundType.Transparent))
if self.service_item.theme_data.background_filename:
self.service_item.bg_image_bytes = self.image_manager.get_image_bytes(
self.service_item.theme_data.background_filename, ImageSource.Theme)
if image_path:
image_bytes = self.image_manager.get_image_bytes(image_path, ImageSource.ImagePlugin)
else:
image_bytes = None
html = build_html(self.service_item, self.screen, self.is_live, background, image_bytes,
plugins=self.plugin_manager.plugins)
self.web_view.setHtml(html)
if service_item.foot_text:
self.footer(service_item.foot_text)
# if was hidden keep it hidden
if self.hide_mode and self.is_live and not service_item.is_media():
if Settings().value('core/auto unblank'):
Registry().execute('slidecontroller_live_unblank')
else:
self.hide_display(self.hide_mode)
self._hide_mouse()
def footer(self, text):
"""
Display the Footer
:param text: footer text to be displayed
"""
js = 'show_footer(\'' + text.replace('\\', '\\\\').replace('\'', '\\\'') + '\')'
self.frame.evaluateJavaScript(js)
def hide_display(self, mode=HideMode.Screen):
"""
Hide the display by making all layers transparent Store the images so they can be replaced when required
:param mode: How the screen is to be hidden
"""
self.log_debug('hide_display mode = %d' % mode)
if self.screens.display_count == 1:
# Only make visible if setting enabled.
if not Settings().value('core/display on monitor'):
return
if mode == HideMode.Screen:
self.frame.evaluateJavaScript('show_blank("desktop");')
self.setVisible(False)
elif mode == HideMode.Blank or self.initial_fame:
self.frame.evaluateJavaScript('show_blank("black");')
else:
self.frame.evaluateJavaScript('show_blank("theme");')
if mode != HideMode.Screen:
if self.isHidden():
self.setVisible(True)
self.web_view.setVisible(True)
self.hide_mode = mode
def show_display(self):
"""
Show the stored layers so the screen reappears as it was originally.
Make the stored images None to release memory.
"""
if self.screens.display_count == 1:
# Only make visible if setting enabled.
if not Settings().value('core/display on monitor'):
return
self.frame.evaluateJavaScript('show_blank("show");')
if self.isHidden():
self.setVisible(True)
self.hide_mode = None
# Trigger actions when display is active again.
if self.is_live:
Registry().execute('live_display_active')
def _hide_mouse(self):
"""
Hide mouse cursor when moved over display.
"""
if Settings().value('advanced/hide mouse'):
self.setCursor(QtCore.Qt.BlankCursor)
self.frame.evaluateJavaScript('document.body.style.cursor = "none"')
else:
self.setCursor(QtCore.Qt.ArrowCursor)
self.frame.evaluateJavaScript('document.body.style.cursor = "auto"')
def change_window_level(self, window):
"""
Changes the display window level on Mac OS X so that the main window can be brought into focus but still allow
the main display to be above the menu bar and dock when it in focus.
:param window: Window from our application that focus changed to or None if outside our application
"""
if is_macosx():
if window:
# Get different window ids' as int's
try:
window_id = window.winId().__int__()
main_window_id = self.main_window.winId().__int__()
self_id = self.winId().__int__()
except:
return
# If the passed window has the same id as our window make sure the display has the proper level and
# collection behavior.
if window_id == self_id:
self.pyobjc_nsview.window().setLevel_(NSMainMenuWindowLevel + 2)
self.pyobjc_nsview.window().setCollectionBehavior_(NSWindowCollectionBehaviorManaged)
# Else set the displays window level back to normal since we are trying to focus a window other than
# the display.
else:
self.pyobjc_nsview.window().setLevel_(0)
self.pyobjc_nsview.window().setCollectionBehavior_(NSWindowCollectionBehaviorManaged)
# If we are trying to focus the main window raise it now to complete the focus change.
if window_id == main_window_id:
self.main_window.raise_()
def shake_web_view(self):
"""
Resizes the web_view a bit to force an update. Workaround for bug #1531319, should not be needed with PyQt 5.6.
"""
self.web_view.setGeometry(0, 0, self.width(), self.height()-1)
self.web_view.setGeometry(0, 0, self.width(), self.height())
class AudioPlayer(OpenLPMixin, QtCore.QObject):
"""
This Class will play audio only allowing components to work with a soundtrack independent of the user interface.
"""
position_changed = QtCore.pyqtSignal(int)
def __init__(self, parent):
"""
The constructor for the display form.
:param parent: The parent widget.
"""
super(AudioPlayer, self).__init__(parent)
self.player = QtMultimedia.QMediaPlayer()
self.playlist = QtMultimedia.QMediaPlaylist(self.player)
self.volume_slider = None
self.player.setPlaylist(self.playlist)
self.player.positionChanged.connect(self._on_position_changed)
def __del__(self):
"""
Shutting down so clean up connections
"""
self.stop()
def _on_position_changed(self, position):
"""
Emit a signal when the position of the media player updates
"""
self.position_changed.emit(position)
def set_volume_slider(self, slider):
"""
Connect the volume slider to the media player
:param slider:
"""
self.volume_slider = slider
self.volume_slider.setMinimum(0)
self.volume_slider.setMaximum(100)
self.volume_slider.setValue(self.player.volume())
self.volume_slider.valueChanged.connect(self.set_volume)
def set_volume(self, volume):
"""
Set the volume of the media player
:param volume:
"""
self.player.setVolume(volume)
def reset(self):
"""
Reset the audio player, clearing the playlist and the queue.
"""
self.stop()
self.playlist.clear()
def play(self):
"""
We want to play the file so start it
"""
self.player.play()
def pause(self):
"""
Pause the Audio
"""
self.player.pause()
def stop(self):
"""
Stop the Audio and clean up
"""
self.player.stop()
def add_to_playlist(self, file_names):
"""
Add another file to the playlist.
:param file_names: A list with files to be added to the playlist.
"""
if not isinstance(file_names, list):
file_names = [file_names]
for file_name in file_names:
self.playlist.addMedia(QtMultimedia.QMediaContent(QtCore.QUrl.fromLocalFile(file_name)))
def next(self):
"""
Skip forward to the next track in the list
"""
self.player.next()
def go_to(self, index):
"""
Go to a particular track in the list
:param index: The track to go to
"""
self.playlist.setCurrentIndex(index)
if self.player.state() == QtMultimedia.QMediaPlayer.PlayingState:
self.player.play()
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