forked from openlp/openlp
282 lines
11 KiB
Python
282 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=80 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) 2008-2009 Raoul Snyman #
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# Portions copyright (c) 2008-2009 Tim Bentley, Jonathan Corwin, Michael #
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# Gorven, Scott Guerrieri, Maikel Stuivenberg, Martin Thompson, Jon Tibble, #
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# Carsten Tinggaard #
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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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import logging
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from PyQt4 import QtGui, QtCore
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from renderer import Renderer
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from openlp.core.lib import ThemeLevel
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class RenderManager(object):
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"""
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Class to pull all Renderer interactions into one place. The plugins will
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call helper methods to do the rendering but this class will provide
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display defense code.
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``theme_manager``
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The ThemeManager instance, used to get the current theme details.
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``screen_list``
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The list of screens available.
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``screen_number``
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Defaults to *0*. The index of the output/display screen.
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"""
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global log
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log = logging.getLogger(u'RenderManager')
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log.info(u'RenderManager Loaded')
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def __init__(self, theme_manager, screen_list, screen_number=0):
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"""
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Initialise the render manager.
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"""
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log.debug(u'Initilisation started')
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self.screen_list = screen_list
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self.theme_manager = theme_manager
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self.displays = len(screen_list)
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if (screen_number + 1) > len(screen_list):
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self.current_display = 0
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else:
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self.current_display = screen_number
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self.renderer = Renderer()
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self.calculate_default(self.screen_list[self.current_display][u'size'])
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self.theme = u''
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self.service_theme = u''
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self.theme_level = u''
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self.override_background = None
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self.themedata = None
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self.save_bg_frame = None
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self.override_background_changed = False
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def update_display(self, screen_number):
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"""
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Updates the render manager's information about the current screen.
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``screen_number``
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The updated index of the output/display screen.
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"""
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log.debug(u'Update Display')
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if self.current_display != screen_number:
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self.current_display = screen_number
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self.calculate_default(
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self.screen_list[self.current_display][u'size'])
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def set_global_theme(self, global_theme, theme_level=ThemeLevel.Global):
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"""
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Set the global-level theme and the theme level.
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``global_theme``
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The global-level theme to be set.
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``theme_level``
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Defaults to *``ThemeLevel.Global``*. The theme level, can be
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``ThemeLevel.Global``, ``ThemeLevel.Service`` or
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``ThemeLevel.Song``.
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"""
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self.global_theme = global_theme
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self.theme_level = theme_level
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def set_service_theme(self, service_theme):
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"""
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Set the service-level theme.
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``service_theme``
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The service-level theme to be set.
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"""
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self.service_theme = service_theme
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def set_override_theme(self, theme):
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"""
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Set the appropriate theme depending on the theme level.
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``theme``
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The name of the song-level theme.
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"""
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log.debug(u'set override theme to %s', theme)
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if self.theme_level == ThemeLevel.Global:
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self.theme = self.global_theme
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elif self.theme_level == ThemeLevel.Service:
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if self.service_theme == u'':
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self.theme = self.global_theme
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else:
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self.theme = self.service_theme
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else:
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if theme:
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self.theme = theme
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elif self.theme_level == ThemeLevel.Song or \
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self.theme_level == ThemeLevel.Service:
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if self.service_theme == u'':
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self.theme = self.global_theme
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else:
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self.theme = self.service_theme
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else:
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self.theme = self.global_theme
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if self.theme != self.renderer.theme_name or self.themedata is None:
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log.debug(u'theme is now %s', self.theme)
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self.themedata = self.theme_manager.getThemeData(self.theme)
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self.calculate_default(
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self.screen_list[self.current_display][u'size'])
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self.renderer.set_theme(self.themedata)
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self.build_text_rectangle(self.themedata)
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#Replace the backgrount image from renderer with one from image
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if self.override_background:
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if self.save_bg_frame is None:
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self.save_bg_frame = self.renderer.bg_frame
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if self.override_background_changed:
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self.renderer.bg_frame = self.resize_image(
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self.override_background)
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self.override_background_changed = False
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else:
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if self.override_background_changed:
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self.renderer.bg_frame = self.resize_image(
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self.override_background)
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self.override_background_changed = False
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if self.save_bg_frame:
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self.renderer.bg_frame = self.save_bg_frame
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self.save_bg_frame = None
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def build_text_rectangle(self, theme):
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"""
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Builds a text block using the settings in ``theme``.
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One is needed per slide
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``theme``
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The theme to build a text block for.
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"""
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log.debug(u'build_text_rectangle')
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main_rect = None
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footer_rect = None
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if not theme.font_main_override:
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main_rect = QtCore.QRect(10, 0, self.width - 1,
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self.footer_start - 20)
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else:
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main_rect = QtCore.QRect(theme.font_main_x, theme.font_main_y,
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theme.font_main_width - 1, theme.font_main_height - 1)
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if not theme.font_footer_override:
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footer_rect = QtCore.QRect(10, self.footer_start, self.width - 1,
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self.height-self.footer_start)
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else:
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footer_rect = QtCore.QRect(theme.font_footer_x,
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theme.font_footer_y, theme.font_footer_width - 1,
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theme.font_footer_height - 1)
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self.renderer.set_text_rectangle(main_rect, footer_rect)
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def generate_preview(self, themedata):
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"""
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Generate a preview of a theme.
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``themedata``
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The theme to generated a preview for.
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"""
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log.debug(u'generate preview')
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self.calculate_default(QtCore.QSize(1024, 768))
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self.renderer.set_theme(themedata)
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self.build_text_rectangle(themedata)
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self.renderer.set_frame_dest(self.width, self.height, True)
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verse = u'Amazing Grace!\n'\
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'How sweet the sound\n'\
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'To save a wretch like me;\n'\
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'I once was lost but now am found,\n'\
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'Was blind, but now I see.'
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footer = []
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footer.append(u'Amazing Grace (John Newton)' )
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footer.append(u'Public Domain')
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footer.append(u'CCLI 123456')
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formatted = self.renderer.format_slide(verse, False)
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return self.renderer.generate_frame_from_lines(formatted[0], footer)
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def format_slide(self, words):
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"""
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Calculate how much text can fit on a slide.
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``words``
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The words to go on the slides.
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"""
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log.debug(u'format slide')
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self.build_text_rectangle(self.themedata)
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return self.renderer.format_slide(words, False)
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def generate_slide(self, main_text, footer_text):
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"""
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Generate the actual slide image.
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``main_text``
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The text for the main area of the slide.
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``footer_text``
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The text for the slide footer.
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"""
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log.debug(u'generate slide')
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self.build_text_rectangle(self.themedata)
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self.renderer.set_frame_dest(self.width, self.height)
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return self.renderer.generate_frame_from_lines(main_text, footer_text)
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def resize_image(self, image, width=0, height=0):
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"""
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Resize an image to fit on the current screen.
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``image``
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The image to resize.
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"""
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preview = QtGui.QImage(image)
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if width == 0:
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w = self.width
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h = self.height
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else:
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w = width
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h = height
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preview = preview.scaled(w, h, QtCore.Qt.KeepAspectRatio,
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QtCore.Qt.SmoothTransformation)
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realw = preview.width();
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realh = preview.height()
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# and move it to the centre of the preview space
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newImage = QtGui.QImage(w, h, QtGui.QImage.Format_ARGB32_Premultiplied)
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newImage.fill(QtCore.Qt.black)
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painter = QtGui.QPainter(newImage)
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painter.drawImage((w - realw) / 2, (h - realh) / 2, preview)
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return newImage
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def calculate_default(self, screen):
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"""
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Calculate the default dimentions of the screen.
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``screen``
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The QWidget instance of the screen.
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"""
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log.debug(u'calculate default %s', screen)
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#size fixed so reflects the preview size.
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if self.current_display == 0:
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self.width = 1024
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self.height = 768
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else:
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self.width = screen.width()
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self.height = screen.height()
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self.screen_ratio = float(self.height) / float(self.width)
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log.debug(u'calculate default %d, %d, %f',
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self.width, self.height, self.screen_ratio )
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# 90% is start of footer
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self.footer_start = int(self.height * 0.90)
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