Source code for openlp.core.ui.thememanager

# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

# OpenLP - Open Source Lyrics Projection                                      #
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# Copyright (c) 2008-2017 OpenLP Developers                                   #
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# 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.                              #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for    #
# more details.                                                               #
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The Theme Manager manages adding, deleteing and modifying of themes.
import os
import zipfile
import shutil

from xml.etree.ElementTree import ElementTree, XML
from PyQt5 import QtCore, QtGui, QtWidgets

from openlp.core.common import Registry, RegistryProperties, AppLocation, Settings, OpenLPMixin, RegistryMixin, \
    check_directory_exists, UiStrings, translate, is_win, get_filesystem_encoding, delete_file
from openlp.core.lib import FileDialog, ImageSource, ValidationError, get_text_file_string, build_icon, \
    check_item_selected, create_thumb, validate_thumb
from openlp.core.lib.theme import ThemeXML, BackgroundType
from openlp.core.lib.ui import critical_error_message_box, create_widget_action
from openlp.core.ui import FileRenameForm, ThemeForm
from openlp.core.ui.lib import OpenLPToolbar
from openlp.core.common.languagemanager import get_locale_key

[docs]class Ui_ThemeManager(object): """ UI part of the Theme Manager """
[docs] def setup_ui(self, widget): """ Define the UI :param widget: The screen object the the dialog is to be attached to. """ # start with the layout self.layout = QtWidgets.QVBoxLayout(widget) self.layout.setSpacing(0) self.layout.setContentsMargins(0, 0, 0, 0) self.layout.setObjectName('layout') self.toolbar = OpenLPToolbar(widget) self.toolbar.setObjectName('toolbar') self.toolbar.add_toolbar_action('newTheme', text=UiStrings().NewTheme, icon=':/themes/theme_new.png', tooltip=translate('OpenLP.ThemeManager', 'Create a new theme.'), triggers=self.on_add_theme) self.toolbar.add_toolbar_action('editTheme', text=translate('OpenLP.ThemeManager', 'Edit Theme'), icon=':/themes/theme_edit.png', tooltip=translate('OpenLP.ThemeManager', 'Edit a theme.'), triggers=self.on_edit_theme) self.delete_toolbar_action = self.toolbar.add_toolbar_action('delete_theme', text=translate('OpenLP.ThemeManager', 'Delete Theme'), icon=':/general/general_delete.png', tooltip=translate('OpenLP.ThemeManager', 'Delete a theme.'), triggers=self.on_delete_theme) self.toolbar.addSeparator() self.toolbar.add_toolbar_action('importTheme', text=translate('OpenLP.ThemeManager', 'Import Theme'), icon=':/general/general_import.png', tooltip=translate('OpenLP.ThemeManager', 'Import a theme.'), triggers=self.on_import_theme) self.toolbar.add_toolbar_action('exportTheme', text=translate('OpenLP.ThemeManager', 'Export Theme'), icon=':/general/general_export.png', tooltip=translate('OpenLP.ThemeManager', 'Export a theme.'), triggers=self.on_export_theme) self.layout.addWidget(self.toolbar) self.theme_widget = QtWidgets.QWidgetAction(self.toolbar) self.theme_widget.setObjectName('theme_widget') # create theme manager list self.theme_list_widget = QtWidgets.QListWidget(widget) self.theme_list_widget.setAlternatingRowColors(True) self.theme_list_widget.setIconSize(QtCore.QSize(88, 50)) self.theme_list_widget.setContextMenuPolicy(QtCore.Qt.CustomContextMenu) self.theme_list_widget.setObjectName('theme_list_widget') self.layout.addWidget(self.theme_list_widget) self.theme_list_widget.customContextMenuRequested.connect(self.context_menu) # build the context menu = QtWidgets.QMenu() self.edit_action = create_widget_action(, text=translate('OpenLP.ThemeManager', '&Edit Theme'), icon=':/themes/theme_edit.png', triggers=self.on_edit_theme) self.copy_action = create_widget_action(, text=translate('OpenLP.ThemeManager', '&Copy Theme'), icon=':/themes/theme_edit.png', triggers=self.on_copy_theme) self.rename_action = create_widget_action(, text=translate('OpenLP.ThemeManager', '&Rename Theme'), icon=':/themes/theme_edit.png', triggers=self.on_rename_theme) self.delete_action = create_widget_action(, text=translate('OpenLP.ThemeManager', '&Delete Theme'), icon=':/general/general_delete.png', triggers=self.on_delete_theme) self.global_action = create_widget_action(, text=translate('OpenLP.ThemeManager', 'Set As &Global Default'), icon=':/general/general_export.png', triggers=self.change_global_from_screen) self.export_action = create_widget_action(, text=translate('OpenLP.ThemeManager', '&Export Theme'), icon=':/general/general_export.png', triggers=self.on_export_theme) # Signals self.theme_list_widget.doubleClicked.connect(self.change_global_from_screen) self.theme_list_widget.currentItemChanged.connect(self.check_list_state)
[docs]class ThemeManager(OpenLPMixin, RegistryMixin, QtWidgets.QWidget, Ui_ThemeManager, RegistryProperties): """ Manages the orders of Theme. """ def __init__(self, parent=None): """ Constructor """ super(ThemeManager, self).__init__(parent) self.settings_section = 'themes' # Variables self.theme_list = [] self.old_background_image = None
[docs] def bootstrap_initialise(self): """ process the bootstrap initialise setup request """ self.setup_ui(self) self.global_theme = Settings().value(self.settings_section + '/global theme') self.build_theme_path() self.load_first_time_themes()
[docs] def bootstrap_post_set_up(self): """ process the bootstrap post setup request """ self.theme_form = ThemeForm(self) self.theme_form.path = self.path self.file_rename_form = FileRenameForm() Registry().register_function('theme_update_global', self.change_global_from_tab) self.load_themes()
[docs] def build_theme_path(self): """ Set up the theme path variables """ self.path = AppLocation.get_section_data_path(self.settings_section) check_directory_exists(self.path) self.thumb_path = os.path.join(self.path, 'thumbnails') check_directory_exists(self.thumb_path)
[docs] def check_list_state(self, item, field=None): """ If Default theme selected remove delete button. Note for some reason a dummy field is required. Nothing is passed! :param field: :param item: Service Item to process """ if item is None: return real_theme_name = theme_name = item.text() # If default theme restrict actions if real_theme_name == theme_name: self.delete_toolbar_action.setVisible(True) else: self.delete_toolbar_action.setVisible(False)
[docs] def context_menu(self, point): """ Build the Right Click Context menu and set state depending on the type of theme. :param point: The position of the mouse so the correct item can be found. """ item = self.theme_list_widget.itemAt(point) if item is None: return real_theme_name = theme_name = str(item.text()) visible = real_theme_name == theme_name self.delete_action.setVisible(visible) self.rename_action.setVisible(visible) self.global_action.setVisible(visible)
[docs] def change_global_from_tab(self): """ Change the global theme when it is changed through the Themes settings tab """ self.global_theme = Settings().value(self.settings_section + '/global theme') self.log_debug('change_global_from_tab {text}'.format(text=self.global_theme)) for count in range(0, self.theme_list_widget.count()): # reset the old name item = self.theme_list_widget.item(count) old_name = item.text() new_name = if old_name != new_name: self.theme_list_widget.item(count).setText(new_name) # Set the new name if self.global_theme == new_name: name = translate('OpenLP.ThemeManager', '{text} (default)').format(text=new_name) self.theme_list_widget.item(count).setText(name) self.delete_toolbar_action.setVisible(item not in self.theme_list_widget.selectedItems())
[docs] def change_global_from_screen(self, index=-1): """ Change the global theme when a theme is double clicked upon in the Theme Manager list. :param index: """ selected_row = self.theme_list_widget.currentRow() for count in range(0, self.theme_list_widget.count()): item = self.theme_list_widget.item(count) old_name = item.text() # reset the old name if old_name != self.theme_list_widget.item(count).setText( # Set the new name if count == selected_row: self.global_theme = self.theme_list_widget.item(count).text() name = translate('OpenLP.ThemeManager', '{text} (default)').format(text=self.global_theme) self.theme_list_widget.item(count).setText(name) Settings().setValue(self.settings_section + '/global theme', self.global_theme) Registry().execute('theme_update_global') self._push_themes()
[docs] def on_add_theme(self, field=None): """ Loads a new theme with the default settings and then launches the theme editing form for the user to make their customisations. :param field: """ theme = ThemeXML() theme.set_default_header_footer() self.theme_form.theme = theme self.theme_form.exec() self.load_themes()
[docs] def on_rename_theme(self, field=None): """ Renames an existing theme to a new name :param field: """ # TODO: Check for delayed format() conversions if self._validate_theme_action(translate('OpenLP.ThemeManager', 'You must select a theme to rename.'), translate('OpenLP.ThemeManager', 'Rename Confirmation'), translate('OpenLP.ThemeManager', 'Rename %s theme?'), False, False): item = self.theme_list_widget.currentItem() old_theme_name = self.file_rename_form.file_name_edit.setText(old_theme_name) if self.file_rename_form.exec(): new_theme_name = self.file_rename_form.file_name_edit.text() if old_theme_name == new_theme_name: return if self.check_if_theme_exists(new_theme_name): old_theme_data = self.get_theme_data(old_theme_name) self.clone_theme_data(old_theme_data, new_theme_name) self.delete_theme(old_theme_name) for plugin in self.plugin_manager.plugins: if plugin.uses_theme(old_theme_name): plugin.rename_theme(old_theme_name, new_theme_name) self.renderer.update_theme(new_theme_name, old_theme_name) self.load_themes()
[docs] def on_copy_theme(self, field=None): """ Copies an existing theme to a new name :param field: """ item = self.theme_list_widget.currentItem() old_theme_name = self.file_rename_form.file_name_edit.setText(translate('OpenLP.ThemeManager', 'Copy of {name}', 'Copy of <theme name>').format(name=old_theme_name)) if self.file_rename_form.exec(True): new_theme_name = self.file_rename_form.file_name_edit.text() if self.check_if_theme_exists(new_theme_name): theme_data = self.get_theme_data(old_theme_name) self.clone_theme_data(theme_data, new_theme_name)
[docs] def clone_theme_data(self, theme_data, new_theme_name): """ Takes a theme and makes a new copy of it as well as saving it. :param theme_data: The theme to be used :param new_theme_name: The new theme name to save the data to """ save_to = None save_from = None if theme_data.background_type == 'image' or theme_data.background_type == 'video': save_to = os.path.join(self.path, new_theme_name, os.path.split(str(theme_data.background_filename))[1]) save_from = theme_data.background_filename theme_data.theme_name = new_theme_name theme_data.extend_image_filename(self.path) self.save_theme(theme_data, save_from, save_to) self.load_themes()
[docs] def on_edit_theme(self, field=None): """ Loads the settings for the theme that is to be edited and launches the theme editing form so the user can make their changes. :param field: """ if check_item_selected(self.theme_list_widget, translate('OpenLP.ThemeManager', 'You must select a theme to edit.')): item = self.theme_list_widget.currentItem() theme = self.get_theme_data( if theme.background_type == 'image' or theme.background_type == 'video': self.old_background_image = theme.background_filename self.theme_form.theme = theme self.theme_form.exec(True) self.old_background_image = None self.renderer.update_theme(theme.theme_name) self.load_themes()
[docs] def on_delete_theme(self, field=None): """ Delete a theme triggered by the UI. :param field: """ # TODO: Verify delayed format() conversions if self._validate_theme_action(translate('OpenLP.ThemeManager', 'You must select a theme to delete.'), translate('OpenLP.ThemeManager', 'Delete Confirmation'), translate('OpenLP.ThemeManager', 'Delete %s theme?')): item = self.theme_list_widget.currentItem() theme = item.text() row = self.theme_list_widget.row(item) self.theme_list_widget.takeItem(row) self.delete_theme(theme) self.renderer.update_theme(theme, only_delete=True) # As we do not reload the themes, push out the change. Reload the # list as the internal lists and events need to be triggered. self._push_themes()
[docs] def delete_theme(self, theme): """ Delete a theme. :param theme: The theme to delete. """ self.theme_list.remove(theme) thumb = '{name}.png'.format(name=theme) delete_file(os.path.join(self.path, thumb)) delete_file(os.path.join(self.thumb_path, thumb)) try: # Windows is always unicode, so no need to encode filenames if is_win(): shutil.rmtree(os.path.join(self.path, theme)) else: encoding = get_filesystem_encoding() shutil.rmtree(os.path.join(self.path, theme).encode(encoding)) except OSError as os_error: shutil.Error = os_error self.log_exception('Error deleting theme {name}'.format(name=theme))
[docs] def on_export_theme(self, field=None): """ Export the theme in a zip file :param field: """ item = self.theme_list_widget.currentItem() if item is None: critical_error_message_box(message=translate('OpenLP.ThemeManager', 'You have not selected a theme.')) return theme = path = QtWidgets.QFileDialog.getExistingDirectory(self, translate('OpenLP.ThemeManager', 'Save Theme - ({name})').format(name=theme), Settings().value(self.settings_section + '/last directory export')) self.application.set_busy_cursor() if path: Settings().setValue(self.settings_section + '/last directory export', path) if self._export_theme(path, theme): QtWidgets.QMessageBox.information(self, translate('OpenLP.ThemeManager', 'Theme Exported'), translate('OpenLP.ThemeManager', 'Your theme has been successfully exported.')) self.application.set_normal_cursor()
def _export_theme(self, path, theme): """ Create the zipfile with the theme contents. :param path: Location where the zip file will be placed :param theme: The name of the theme to be exported """ theme_path = os.path.join(path, theme + '.otz') theme_zip = None try: theme_zip = zipfile.ZipFile(theme_path, 'w') source = os.path.join(self.path, theme) for files in os.walk(source): for name in files[2]: theme_zip.write(os.path.join(source, name), os.path.join(theme, name)) theme_zip.close() return True except OSError as ose: self.log_exception('Export Theme Failed') critical_error_message_box(translate('OpenLP.ThemeManager', 'Theme Export Failed'), translate('OpenLP.ThemeManager', 'The theme export failed because this error ' 'occurred: {err}').format(err=ose.strerror)) if theme_zip: theme_zip.close() shutil.rmtree(theme_path, True) return False
[docs] def on_import_theme(self, field=None): """ Opens a file dialog to select the theme file(s) to import before attempting to extract OpenLP themes from those files. This process will only load version 2 themes. :param field: """ files = FileDialog.getOpenFileNames(self, translate('OpenLP.ThemeManager', 'Select Theme Import File'), Settings().value(self.settings_section + '/last directory import'), translate('OpenLP.ThemeManager', 'OpenLP Themes (*.otz)')) self.log_info('New Themes {name}'.format(name=str(files))) if not files: return self.application.set_busy_cursor() for file_name in files: Settings().setValue(self.settings_section + '/last directory import', str(file_name)) self.unzip_theme(file_name, self.path) self.load_themes() self.application.set_normal_cursor()
[docs] def load_first_time_themes(self): """ Imports any themes on start up and makes sure there is at least one theme """ self.application.set_busy_cursor() files = AppLocation.get_files(self.settings_section, '.otz') for theme_file in files: theme_file = os.path.join(self.path, theme_file) self.unzip_theme(theme_file, self.path) delete_file(theme_file) files = AppLocation.get_files(self.settings_section, '.png') # No themes have been found so create one if not files: theme = ThemeXML() theme.theme_name = UiStrings().Default self._write_theme(theme, None, None) Settings().setValue(self.settings_section + '/global theme', theme.theme_name) self.application.set_normal_cursor()
[docs] def load_themes(self): """ Loads the theme lists and triggers updates across the whole system using direct calls or core functions and events for the plugins. The plugins will call back in to get the real list if they want it. """ self.theme_list = [] self.theme_list_widget.clear() files = AppLocation.get_files(self.settings_section, '.png') # Sort the themes by its name considering language specific files.sort(key=lambda file_name: get_locale_key(str(file_name))) # now process the file list of png files for name in files: # check to see file is in theme root directory theme = os.path.join(self.path, name) if os.path.exists(theme): text_name = os.path.splitext(name)[0] if text_name == self.global_theme: name = translate('OpenLP.ThemeManager', '{name} (default)').format(name=text_name) else: name = text_name thumb = os.path.join(self.thumb_path, '{name}.png'.format(name=text_name)) item_name = QtWidgets.QListWidgetItem(name) if validate_thumb(theme, thumb): icon = build_icon(thumb) else: icon = create_thumb(theme, thumb) item_name.setIcon(icon) item_name.setData(QtCore.Qt.UserRole, text_name) self.theme_list_widget.addItem(item_name) self.theme_list.append(text_name) self._push_themes()
def _push_themes(self): """ Notify listeners that the theme list has been updated """ Registry().execute('theme_update_list', self.get_themes())
[docs] def get_themes(self): """ Return the list of loaded themes """ return self.theme_list
[docs] def get_theme_data(self, theme_name): """ Returns a theme object from an XML file :param theme_name: Name of the theme to load from file :return: The theme object. """ self.log_debug('get theme data for theme {name}'.format(name=theme_name)) xml_file = os.path.join(self.path, str(theme_name), str(theme_name) + '.xml') xml = get_text_file_string(xml_file) if not xml: self.log_debug('No theme data - using default theme') return ThemeXML() else: return self._create_theme_from_xml(xml, self.path)
[docs] def over_write_message_box(self, theme_name): """ Display a warning box to the user that a theme already exists :param theme_name: Name of the theme. :return: Confirm if the theme is to be overwritten. """ ret = QtWidgets.QMessageBox.question(self, translate('OpenLP.ThemeManager', 'Theme Already Exists'), translate('OpenLP.ThemeManager', 'Theme {name} already exists. ' 'Do you want to replace it?').format(name=theme_name), QtWidgets.QMessageBox.StandardButtons(QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No), QtWidgets.QMessageBox.No) return ret == QtWidgets.QMessageBox.Yes
[docs] def unzip_theme(self, file_name, directory): """ Unzip the theme, remove the preview file if stored. Generate a new preview file. Check the XML theme version and upgrade if necessary. :param file_name: :param directory: """ self.log_debug('Unzipping theme {name}'.format(name=file_name)) theme_zip = None out_file = None file_xml = None abort_import = True try: theme_zip = zipfile.ZipFile(file_name) xml_file = [name for name in theme_zip.namelist() if os.path.splitext(name)[1].lower() == '.xml'] if len(xml_file) != 1: self.log_error('Theme contains "{val:d}" XML files'.format(val=len(xml_file))) raise ValidationError xml_tree = ElementTree(element=XML([0]))).getroot() theme_version = xml_tree.get('version', default=None) if not theme_version or float(theme_version) < 2.0: self.log_error('Theme version is less than 2.0') raise ValidationError theme_name = xml_tree.find('name').text.strip() theme_folder = os.path.join(directory, theme_name) theme_exists = os.path.exists(theme_folder) if theme_exists and not self.over_write_message_box(theme_name): abort_import = True return else: abort_import = False for name in theme_zip.namelist(): out_name = name.replace('/', os.path.sep) split_name = out_name.split(os.path.sep) if split_name[-1] == '' or len(split_name) == 1: # is directory or preview file continue full_name = os.path.join(directory, out_name) check_directory_exists(os.path.dirname(full_name)) if os.path.splitext(name)[1].lower() == '.xml': file_xml = str(, 'utf-8') out_file = open(full_name, 'w', encoding='utf-8') out_file.write(file_xml) else: out_file = open(full_name, 'wb') out_file.write( out_file.close() except (IOError, zipfile.BadZipfile): self.log_exception('Importing theme from zip failed {name}'.format(name=file_name)) raise ValidationError except ValidationError: critical_error_message_box(translate('OpenLP.ThemeManager', 'Validation Error'), translate('OpenLP.ThemeManager', 'File is not a valid theme.')) finally: # Close the files, to be able to continue creating the theme. if theme_zip: theme_zip.close() if out_file: out_file.close() if not abort_import: # As all files are closed, we can create the Theme. if file_xml: theme = self._create_theme_from_xml(file_xml, self.path) self.generate_and_save_image(theme_name, theme) # Only show the error message, when IOError was not raised (in # this case the error message has already been shown). elif theme_zip is not None: critical_error_message_box( translate('OpenLP.ThemeManager', 'Validation Error'), translate('OpenLP.ThemeManager', 'File is not a valid theme.')) self.log_error('Theme file does not contain XML data {name}'.format(name=file_name))
[docs] def check_if_theme_exists(self, theme_name): """ Check if theme already exists and displays error message :param theme_name: Name of the Theme to test :return: True or False if theme exists """ theme_dir = os.path.join(self.path, theme_name) if os.path.exists(theme_dir): critical_error_message_box( translate('OpenLP.ThemeManager', 'Validation Error'), translate('OpenLP.ThemeManager', 'A theme with this name already exists.')) return False return True
[docs] def save_theme(self, theme, image_from, image_to): """ Called by theme maintenance Dialog to save the theme and to trigger the reload of the theme list :param theme: The theme data object. :param image_from: Where the theme image is currently located. :param image_to: Where the Theme Image is to be saved to """ self._write_theme(theme, image_from, image_to) if theme.background_type == BackgroundType.to_string(BackgroundType.Image): self.image_manager.update_image_border(theme.background_filename, ImageSource.Theme, QtGui.QColor(theme.background_border_color)) self.image_manager.process_updates()
def _write_theme(self, theme, image_from, image_to): """ Writes the theme to the disk and handles the background image if necessary :param theme: The theme data object. :param image_from: Where the theme image is currently located. :param image_to: Where the Theme Image is to be saved to """ name = theme.theme_name theme_pretty_xml = theme.extract_formatted_xml() theme_dir = os.path.join(self.path, name) check_directory_exists(theme_dir) theme_file = os.path.join(theme_dir, name + '.xml') if self.old_background_image and image_to != self.old_background_image: delete_file(self.old_background_image) out_file = None try: out_file = open(theme_file, 'w', encoding='utf-8') out_file.write(theme_pretty_xml.decode('utf-8')) except IOError: self.log_exception('Saving theme to file failed') finally: if out_file: out_file.close() if image_from and os.path.abspath(image_from) != os.path.abspath(image_to): try: # Windows is always unicode, so no need to encode filenames if is_win(): shutil.copyfile(image_from, image_to) else: encoding = get_filesystem_encoding() shutil.copyfile(image_from.encode(encoding), image_to.encode(encoding)) except IOError as xxx_todo_changeme: shutil.Error = xxx_todo_changeme self.log_exception('Failed to save theme image') self.generate_and_save_image(name, theme)
[docs] def generate_and_save_image(self, name, theme): """ Generate and save a preview image :param name: The name of the theme. :param theme: The theme data object. """ frame = self.generate_image(theme) sample_path_name = os.path.join(self.path, name + '.png') if os.path.exists(sample_path_name): os.unlink(sample_path_name), 'png') thumb = os.path.join(self.thumb_path, '{name}.png'.format(name=name)) create_thumb(sample_path_name, thumb, False)
[docs] def update_preview_images(self): """ Called to update the themes' preview images. """ self.main_window.display_progress_bar(len(self.theme_list)) for theme in self.theme_list: self.main_window.increment_progress_bar() self.generate_and_save_image(theme, self.get_theme_data(theme)) self.main_window.finished_progress_bar() self.load_themes()
[docs] def generate_image(self, theme_data, force_page=False): """ Call the renderer to build a Sample Image :param theme_data: The theme to generated a preview for. :param force_page: Flag to tell message lines per page need to be generated. """ return self.renderer.generate_preview(theme_data, force_page)
[docs] def get_preview_image(self, theme): """ Return an image representing the look of the theme :param theme: The theme to return the image for. """ return os.path.join(self.path, theme + '.png')
def _create_theme_from_xml(self, theme_xml, image_path): """ Return a theme object using information parsed from XML :param theme_xml: The Theme data object. :param image_path: Where the theme image is stored :return: Theme data. """ theme = ThemeXML() theme.parse(theme_xml) theme.extend_image_filename(image_path) return theme def _validate_theme_action(self, select_text, confirm_title, confirm_text, test_plugin=True, confirm=True): """ Check to see if theme has been selected and the destructive action is allowed. :param select_text: Text for message box if no item selected. :param confirm_title: Confirm message title to be displayed. :param confirm_text: Confirm message text to be displayed. :param test_plugin: Do we check the plugins for theme usage. :param confirm: Do we display a confirm box before run checks. :return: True or False depending on the validity. """ self.global_theme = Settings().value(self.settings_section + '/global theme') if check_item_selected(self.theme_list_widget, select_text): item = self.theme_list_widget.currentItem() theme = item.text() # confirm deletion if confirm: answer = QtWidgets.QMessageBox.question( self, confirm_title, confirm_text % theme, QtWidgets.QMessageBox.StandardButtons(QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No), QtWidgets.QMessageBox.No) if answer == QtWidgets.QMessageBox.No: return False # should be the same unless default if theme != critical_error_message_box( message=translate('OpenLP.ThemeManager', 'You are unable to delete the default theme.')) return False # check for use in the system else where. if test_plugin: plugin_usage = "" for plugin in self.plugin_manager.plugins: used_count = plugin.uses_theme(theme) if used_count: plugin_usage = "{plug}{text}".format(plug=plugin_usage, text=(translate('OpenLP.ThemeManager', '{count} time(s) by {plugin}' ).format(name=used_count, plugin_usage = "{text}\n".format(text=plugin_usage) if plugin_usage: critical_error_message_box(translate('OpenLP.ThemeManager', 'Unable to delete theme'), translate('OpenLP.ThemeManager', 'Theme is currently used \n\n{text}' ).format(text=plugin_usage)) return False return True return False