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openlp/openlp/core/lib/mediamanageritem.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) 2008-2013 Raoul Snyman #
# Portions copyright (c) 2008-2013 Tim Bentley, Gerald Britton, Jonathan #
# Corwin, Samuel Findlay, Michael Gorven, Scott Guerrieri, Matthias Hub, #
# Meinert Jordan, Armin Köhler, Erik Lundin, Edwin Lunando, Brian T. Meyer. #
# Joshua Miller, Stevan Pettit, Andreas Preikschat, Mattias Põldaru, #
# Christian Richter, Philip Ridout, Simon Scudder, Jeffrey Smith, #
# Maikel Stuivenberg, Martin Thompson, Jon Tibble, Dave Warnock, #
# Frode Woldsund, Martin Zibricky, Patrick Zimmermann #
# --------------------------------------------------------------------------- #
# 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 #
###############################################################################
"""
Provides the generic functions for interfacing plugins with the Media Manager.
"""
import logging
import os
import re
from PyQt4 import QtCore, QtGui
from openlp.core.lib import OpenLPToolbar, ServiceItem, StringContent, ListWidgetWithDnD, \
ServiceItemContext, Settings, Registry, UiStrings, translate
from openlp.core.lib.searchedit import SearchEdit
from openlp.core.lib.ui import create_widget_action, critical_error_message_box
log = logging.getLogger(__name__)
class MediaManagerItem(QtGui.QWidget):
"""
MediaManagerItem is a helper widget for plugins.
None of the following *need* to be used, feel free to override them completely in your plugin's implementation.
Alternatively, call them from your plugin before or after you've done extra things that you need to.
**Constructor Parameters**
``parent``
The parent widget. Usually this will be the *Media Manager* itself. This needs to be a class descended from
``QWidget``.
``plugin``
The plugin widget. Usually this will be the *Plugin* itself. This needs to be a class descended from ``Plugin``.
**Member Variables**
When creating a descendant class from this class for your plugin, the following member variables should be set.
``self.on_new_prompt``
Defaults to *'Select Image(s)'*.
``self.on_new_file_masks``
Defaults to *'Images (*.jpg *jpeg *.gif *.png *.bmp)'*. This assumes that the new action is to load a file. If
not, you need to override the ``OnNew`` method.
``self.PreviewFunction``
This must be a method which returns a QImage to represent the item (usually a preview). No scaling is required,
that is performed automatically by OpenLP when necessary. If this method is not defined, a default will be used
(treat the filename as an image).
"""
log.info(u'Media Item loaded')
def __init__(self, parent=None, plugin=None):
"""
Constructor to create the media manager item.
"""
QtGui.QWidget.__init__(self)
self.hide()
self.whitespace = re.compile(r'[\W_]+', re.UNICODE)
self.plugin = plugin
visible_title = self.plugin.get_string(StringContent.VisibleName)
self.title = unicode(visible_title[u'title'])
Registry().register(self.plugin.name, self)
self.settings_section = self.plugin.name
self.toolbar = None
self.remote_triggered = None
self.single_service_item = True
self.quick_preview_allowed = False
self.has_search = False
self.page_layout = QtGui.QVBoxLayout(self)
self.page_layout.setSpacing(0)
self.page_layout.setMargin(0)
self.required_icons()
self.setupUi()
self.retranslateUi()
self.auto_select_id = -1
Registry().register_function(u'%s_service_load' % self.plugin.name, self.service_load)
def required_icons(self):
"""
This method is called to define the icons for the plugin. It provides a default set and the plugin is able to
override the if required.
"""
self.has_import_icon = False
self.has_new_icon = True
self.has_edit_icon = True
self.has_file_icon = False
self.has_delete_icon = True
self.add_to_service_item = False
def retranslateUi(self):
"""
This method is called automatically to provide OpenLP with the opportunity to translate the ``MediaManagerItem``
to another language.
"""
pass
def add_toolbar(self):
"""
A method to help developers easily add a toolbar to the media manager item.
"""
if self.toolbar is None:
self.toolbar = OpenLPToolbar(self)
self.page_layout.addWidget(self.toolbar)
def setupUi(self):
"""
This method sets up the interface on the button. Plugin developers use this to add and create toolbars, and the
rest of the interface of the media manager item.
"""
# Add a toolbar
self.add_toolbar()
# Allow the plugin to define buttons at start of bar
self.add_start_header_bar()
# Add the middle of the tool bar (pre defined)
self.add_middle_header_bar()
# Allow the plugin to define buttons at end of bar
self.add_end_header_bar()
# Add the list view
self.add_list_view_to_toolbar()
def add_middle_header_bar(self):
"""
Create buttons for the media item toolbar
"""
toolbar_actions = []
## Import Button ##
if self.has_import_icon:
toolbar_actions.append([u'Import', StringContent.Import,
u':/general/general_import.png', self.on_import_click])
## Load Button ##
if self.has_file_icon:
toolbar_actions.append([u'Load', StringContent.Load, u':/general/general_open.png', self.on_file_click])
## New Button ##
if self.has_new_icon:
toolbar_actions.append([u'New', StringContent.New, u':/general/general_new.png', self.on_new_click])
## Edit Button ##
if self.has_edit_icon:
toolbar_actions.append([u'Edit', StringContent.Edit, u':/general/general_edit.png', self.on_edit_click])
## Delete Button ##
if self.has_delete_icon:
toolbar_actions.append([u'Delete', StringContent.Delete,
u':/general/general_delete.png', self.on_delete_click])
## Preview ##
toolbar_actions.append([u'Preview', StringContent.Preview,
u':/general/general_preview.png', self.on_preview_click])
## Live Button ##
toolbar_actions.append([u'Live', StringContent.Live, u':/general/general_live.png', self.on_live_click])
## Add to service Button ##
toolbar_actions.append([u'Service', StringContent.Service, u':/general/general_add.png', self.on_add_click])
for action in toolbar_actions:
if action[0] == StringContent.Preview:
self.toolbar.addSeparator()
self.toolbar.add_toolbar_action(u'%s%sAction' % (self.plugin.name, action[0]),
text=self.plugin.get_string(action[1])[u'title'], icon=action[2],
tooltip=self.plugin.get_string(action[1])[u'tooltip'],
triggers=action[3])
def add_list_view_to_toolbar(self):
"""
Creates the main widget for listing items the media item is tracking
"""
# Add the List widget
self.list_view = ListWidgetWithDnD(self, self.plugin.name)
self.list_view.setSpacing(1)
self.list_view.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
self.list_view.setAlternatingRowColors(True)
self.list_view.setObjectName(u'%sListView' % self.plugin.name)
# Add to page_layout
self.page_layout.addWidget(self.list_view)
# define and add the context menu
self.list_view.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
if self.has_edit_icon:
create_widget_action(self.list_view,
text=self.plugin.get_string(StringContent.Edit)[u'title'],
icon=u':/general/general_edit.png',
triggers=self.on_edit_click)
create_widget_action(self.list_view, separator=True)
if self.has_delete_icon:
create_widget_action(self.list_view,
u'listView%s%sItem' % (self.plugin.name.title(), StringContent.Delete.title()),
text=self.plugin.get_string(StringContent.Delete)[u'title'],
icon=u':/general/general_delete.png',
can_shortcuts=True, triggers=self.on_delete_click)
create_widget_action(self.list_view, separator=True)
create_widget_action(self.list_view,
u'listView%s%sItem' % (self.plugin.name.title(), StringContent.Preview.title()),
text=self.plugin.get_string(StringContent.Preview)[u'title'],
icon=u':/general/general_preview.png',
can_shortcuts=True,
triggers=self.on_preview_click)
create_widget_action(self.list_view,
u'listView%s%sItem' % (self.plugin.name.title(), StringContent.Live.title()),
text=self.plugin.get_string(StringContent.Live)[u'title'],
icon=u':/general/general_live.png',
can_shortcuts=True,
triggers=self.on_live_click)
create_widget_action(self.list_view,
u'listView%s%sItem' % (self.plugin.name.title(), StringContent.Service.title()),
can_shortcuts=True,
text=self.plugin.get_string(StringContent.Service)[u'title'],
icon=u':/general/general_add.png',
triggers=self.on_add_click)
if self.add_to_service_item:
create_widget_action(self.list_view, separator=True)
create_widget_action(self.list_view,
text=translate('OpenLP.MediaManagerItem', '&Add to selected Service Item'),
icon=u':/general/general_add.png',
triggers=self.on_add_edit_click)
self.add_custom_context_actions()
# Create the context menu and add all actions from the list_view.
self.menu = QtGui.QMenu()
self.menu.addActions(self.list_view.actions())
self.list_view.doubleClicked.connect(self.on_double_clicked)
self.list_view.itemSelectionChanged.connect(self.on_selection_change)
self.list_view.customContextMenuRequested.connect(self.context_menu)
def add_search_to_toolbar(self):
"""
Creates a search field with button and related signal handling.
"""
self.search_widget = QtGui.QWidget(self)
self.search_widget.setObjectName(u'search_widget')
self.search_layout = QtGui.QVBoxLayout(self.search_widget)
self.search_layout.setObjectName(u'search_layout')
self.search_text_layout = QtGui.QFormLayout()
self.search_text_layout.setObjectName(u'search_text_layout')
self.search_text_label = QtGui.QLabel(self.search_widget)
self.search_text_label.setObjectName(u'search_text_label')
self.search_text_edit = SearchEdit(self.search_widget)
self.search_text_edit.setObjectName(u'search_text_edit')
self.search_text_label.setBuddy(self.search_text_edit)
self.search_text_layout.addRow(self.search_text_label, self.search_text_edit)
self.search_layout.addLayout(self.search_text_layout)
self.search_button_layout = QtGui.QHBoxLayout()
self.search_button_layout.setObjectName(u'search_button_layout')
self.search_button_layout.addStretch()
self.search_text_button = QtGui.QPushButton(self.search_widget)
self.search_text_button.setObjectName(u'search_text_button')
self.search_button_layout.addWidget(self.search_text_button)
self.search_layout.addLayout(self.search_button_layout)
self.page_layout.addWidget(self.search_widget)
# Signals and slots
self.search_text_edit.returnPressed.connect(self.on_search_text_button_clicked)
self.search_text_button.clicked.connect(self.on_search_text_button_clicked)
self.search_text_edit.textChanged.connect(self.on_search_text_edit_changed)
def add_custom_context_actions(self):
"""
Implement this method in your descendent media manager item to
add any context menu items. This method is called automatically.
"""
pass
def initialise(self):
"""
Implement this method in your descendent media manager item to
do any UI or other initialisation. This method is called automatically.
"""
pass
def add_start_header_bar(self):
"""
Slot at start of toolbar for plugin to addwidgets
"""
pass
def add_end_header_bar(self):
"""
Slot at end of toolbar for plugin to add widgets
"""
pass
def on_file_click(self):
"""
Add a file to the list widget to make it available for showing
"""
files = QtGui.QFileDialog.getOpenFileNames(self, self.on_new_prompt,
Settings().value(self.settings_section + u'/last directory'), self.on_new_file_masks)
log.info(u'New files(s) %s', files)
if files:
self.application.set_busy_cursor()
self.validate_and_load(files)
self.application.set_normal_cursor()
def load_file(self, data):
"""
Turn file from Drag and Drop into an array so the Validate code can run it.
``data``
A dictionary containing the list of files to be loaded and the target
"""
new_files = []
error_shown = False
for file_name in data['files']:
file_type = file_name.split(u'.')[-1]
if file_type.lower() not in self.on_new_file_masks:
if not error_shown:
critical_error_message_box(translate('OpenLP.MediaManagerItem', 'Invalid File Type'),
translate('OpenLP.MediaManagerItem', 'Invalid File %s.\nSuffix not supported') % file_name)
error_shown = True
else:
new_files.append(file_name)
if new_files:
self.validate_and_load(new_files, data['target'])
def dnd_move_internal(self, target):
"""
Handle internal moving of media manager items
``target``
The target of the DnD action
"""
pass
def validate_and_load(self, files, target_group=None):
"""
Process a list for files either from the File Dialog or from Drag and
Drop
``files``
The files to be loaded.
``target_group``
The QTreeWidgetItem of the group that will be the parent of the added files
"""
names = []
full_list = []
for count in range(self.list_view.count()):
names.append(self.list_view.item(count).text())
full_list.append(self.list_view.item(count).data(QtCore.Qt.UserRole))
duplicates_found = False
files_added = False
for file_path in files:
filename = os.path.split(unicode(file_path))[1]
if filename in names:
duplicates_found = True
else:
files_added = True
full_list.append(file_path)
if full_list and files_added:
if target_group is None:
self.list_view.clear()
self.load_list(full_list, target_group)
last_dir = os.path.split(unicode(files[0]))[0]
Settings().setValue(self.settings_section + u'/last directory', last_dir)
Settings().setValue(u'%s/%s files' % (self.settings_section, self.settings_section), self.get_file_list())
if duplicates_found:
critical_error_message_box(UiStrings().Duplicate,
translate('OpenLP.MediaManagerItem', 'Duplicate files were found on import and were ignored.'))
def context_menu(self, point):
"""
Display a context menu
"""
item = self.list_view.itemAt(point)
# Decide if we have to show the context menu or not.
if item is None:
return
if not item.flags() & QtCore.Qt.ItemIsSelectable:
return
self.menu.exec_(self.list_view.mapToGlobal(point))
def get_file_list(self):
"""
Return the current list of files
"""
file_list = []
for index in xrange(self.list_view.count()):
bitem = self.list_view.item(index)
filename = bitem.data(QtCore.Qt.UserRole)
file_list.append(filename)
return file_list
def load_list(self, list, target_group):
"""
Load a list. Needs to be implemented by the plugin.
"""
raise NotImplementedError(u'MediaManagerItem.loadList needs to be defined by the plugin')
def on_new_click(self):
"""
Hook for plugins to define behaviour for adding new items.
"""
pass
def on_edit_click(self):
"""
Hook for plugins to define behaviour for editing items.
"""
pass
def on_delete_click(self):
"""
Delete an item. Needs to be implemented by the plugin.
"""
raise NotImplementedError(u'MediaManagerItem.on_delete_click needs to be defined by the plugin')
def onFocus(self):
"""
Run when a tab in the media manager gains focus. This gives the media
item a chance to focus any elements it wants to.
"""
pass
def generate_slide_data(self, service_item, item=None, xml_version=False, remote=False,
context=ServiceItemContext.Live):
"""
Generate the slide data. Needs to be implemented by the plugin.
"""
raise NotImplementedError(u'MediaManagerItem.generate_slide_data needs to be defined by the plugin')
def on_double_clicked(self):
"""
Allows the list click action to be determined dynamically
"""
if Settings().value(u'advanced/double click live'):
self.on_live_click()
else:
self.on_preview_click()
def on_selection_change(self):
"""
Allows the change of current item in the list to be actioned
"""
if Settings().value(u'advanced/single click preview') and self.quick_preview_allowed \
and self.list_view.selectedIndexes() and self.auto_select_id == -1:
self.on_preview_click(True)
def on_preview_click(self, keep_focus=False):
"""
Preview an item by building a service item then adding that service item to the preview slide controller.
"""
if not self.list_view.selectedIndexes() and not self.remote_triggered:
QtGui.QMessageBox.information(self, UiStrings().NISp,
translate('OpenLP.MediaManagerItem', 'You must select one or more items to preview.'))
else:
log.debug(u'%s Preview requested', self.plugin.name)
service_item = self.build_service_item()
if service_item:
service_item.from_plugin = True
self.preview_controller.add_service_item(service_item)
if keep_focus:
self.list_view.setFocus()
def on_live_click(self):
"""
Send an item live by building a service item then adding that service item to the live slide controller.
"""
if not self.list_view.selectedIndexes():
QtGui.QMessageBox.information(self, UiStrings().NISp,
translate('OpenLP.MediaManagerItem', 'You must select one or more items to send live.'))
else:
self.go_live()
def go_live(self, item_id=None, remote=False):
"""
Make the currently selected item go live.
"""
log.debug(u'%s Live requested', self.plugin.name)
item = None
if item_id:
item = self.create_item_from_id(item_id)
service_item = self.build_service_item(item, remote=remote)
if service_item:
if not item_id:
service_item.from_plugin = True
if remote:
service_item.will_auto_start = True
self.live_controller.add_service_item(service_item)
def create_item_from_id(self, item_id):
"""
Create a media item from an item id.
"""
item = QtGui.QListWidgetItem()
item.setData(QtCore.Qt.UserRole, item_id)
return item
def on_add_click(self):
"""
Add a selected item to the current service
"""
if not self.list_view.selectedIndexes():
QtGui.QMessageBox.information(self, UiStrings().NISp,
translate('OpenLP.MediaManagerItem', 'You must select one or more items to add.'))
else:
# Is it possible to process multiple list items to generate
# multiple service items?
if self.single_service_item:
log.debug(u'%s Add requested', self.plugin.name)
self.add_to_service(replace=self.remote_triggered)
else:
items = self.list_view.selectedIndexes()
for item in items:
self.add_to_service(item)
def add_to_service(self, item=None, replace=None, remote=False):
"""
Add this item to the current service.
"""
service_item = self.build_service_item(item, True, remote=remote, context=ServiceItemContext.Service)
if service_item:
service_item.from_plugin = False
self.service_manager.add_service_item(service_item, replace=replace)
def on_add_edit_click(self):
"""
Add a selected item to an existing item in the current service.
"""
if not self.list_view.selectedIndexes() and not self.remote_triggered:
QtGui.QMessageBox.information(self, UiStrings().NISp,
translate('OpenLP.MediaManagerItem', 'You must select one or more items.'))
else:
log.debug(u'%s Add requested', self.plugin.name)
service_item = self.service_manager.get_service_item()
if not service_item:
QtGui.QMessageBox.information(self, UiStrings().NISs,
translate('OpenLP.MediaManagerItem', 'You must select an existing service item to add to.'))
elif self.plugin.name == service_item.name:
self.generate_slide_data(service_item)
self.service_manager.add_service_item(service_item, replace=True)
else:
# Turn off the remote edit update message indicator
QtGui.QMessageBox.information(self, translate('OpenLP.MediaManagerItem', 'Invalid Service Item'),
translate('OpenLP.MediaManagerItem', 'You must select a %s service item.') % self.title)
def build_service_item(self, item=None, xml_version=False, remote=False, context=ServiceItemContext.Live):
"""
Common method for generating a service item
"""
service_item = ServiceItem(self.plugin)
service_item.add_icon(self.plugin.icon_path)
if self.generate_slide_data(service_item, item, xml_version, remote, context):
return service_item
else:
return None
def service_load(self, message):
"""
Method to add processing when a service has been loaded and individual service items need to be processed by the
plugins.
"""
pass
def check_search_result(self):
"""
Checks if the list_view is empty and adds a "No Search Results" item.
"""
if self.list_view.count():
return
message = translate('OpenLP.MediaManagerItem', 'No Search Results')
item = QtGui.QListWidgetItem(message)
item.setFlags(QtCore.Qt.NoItemFlags)
font = QtGui.QFont()
font.setItalic(True)
item.setFont(font)
self.list_view.addItem(item)
def _get_id_of_item_to_generate(self, item, remote_item):
"""
Utility method to check items being submitted for slide generation.
``item``
The item to check.
``remote_item``
The id to assign if the slide generation was remotely triggered.
"""
if item is None:
if self.remote_triggered is None:
item = self.list_view.currentItem()
if item is None:
return False
item_id = item.data(QtCore.Qt.UserRole)
else:
item_id = remote_item
else:
item_id = item.data(QtCore.Qt.UserRole)
return item_id
def save_auto_select_id(self):
"""
Sorts out, what item to select after loading a list.
"""
# The item to select has not been set.
if self.auto_select_id == -1:
item = self.list_view.currentItem()
if item:
self.auto_select_id = item.data(QtCore.Qt.UserRole)
def search(self, string, show_error=True):
"""
Performs a plugin specific search for items containing ``string``
"""
raise NotImplementedError(u'Plugin.search needs to be defined by the plugin')
def _get_main_window(self):
"""
Adds the main window to the class dynamically
"""
if not hasattr(self, u'_main_window'):
self._main_window = Registry().get(u'main_window')
return self._main_window
main_window = property(_get_main_window)
def _get_renderer(self):
"""
Adds the Renderer to the class dynamically
"""
if not hasattr(self, u'_renderer'):
self._renderer = Registry().get(u'renderer')
return self._renderer
renderer = property(_get_renderer)
def _get_live_controller(self):
"""
Adds the live controller to the class dynamically
"""
if not hasattr(self, u'_live_controller'):
self._live_controller = Registry().get(u'live_controller')
return self._live_controller
live_controller = property(_get_live_controller)
def _get_preview_controller(self):
"""
Adds the preview controller to the class dynamically
"""
if not hasattr(self, u'_preview_controller'):
self._preview_controller = Registry().get(u'preview_controller')
return self._preview_controller
preview_controller = property(_get_preview_controller)
def _get_plugin_manager(self):
"""
Adds the plugin manager to the class dynamically
"""
if not hasattr(self, u'_plugin_manager'):
self._plugin_manager = Registry().get(u'plugin_manager')
return self._plugin_manager
plugin_manager = property(_get_plugin_manager)
def _get_media_controller(self):
"""
Adds the media controller to the class dynamically
"""
if not hasattr(self, u'_media_controller'):
self._media_controller = Registry().get(u'media_controller')
return self._media_controller
media_controller = property(_get_media_controller)
def _get_service_manager(self):
"""
Adds the service manager to the class dynamically
"""
if not hasattr(self, u'_service_manager'):
self._service_manager = Registry().get(u'service_manager')
return self._service_manager
service_manager = property(_get_service_manager)
def _get_theme_manager(self):
"""
Adds the theme manager to the class dynamically
"""
if not hasattr(self, u'_theme_manager'):
self._theme_manager = Registry().get(u'theme_manager')
return self._theme_manager
theme_manager = property(_get_theme_manager)
def _get_application(self):
"""
Adds the openlp to the class dynamically
"""
if not hasattr(self, u'_application'):
self._application = Registry().get(u'application')
return self._application
application = property(_get_application)
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