gramps/src/DataViews/_MediaView.py

# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2001-2006  Donald N. Allingham
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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
#

# $Id$

"""
Media View
"""

__author__ = "Don Allingham"
__revision__ = "$Revision$"

#-------------------------------------------------------------------------
#
# Python modules
#
#-------------------------------------------------------------------------
from gettext import gettext as _
import urlparse
import os
import cPickle as pickle

#-------------------------------------------------------------------------
#
# GTK/Gnome modules
#
#-------------------------------------------------------------------------
import gtk

#-------------------------------------------------------------------------
#
# gramps modules
#
#-------------------------------------------------------------------------
import PageView
import DisplayModels
import ImgManip
import const
import Config
import Utils
import Bookmarks
import Mime
import RelLib

from Editors import EditMedia, DeleteMediaQuery
import Errors
from QuestionDialog import QuestionDialog, ErrorDialog
from Filters.SideBar import MediaSidebarFilter
from DdTargets import DdTargets

column_names = [
    _('Title'),
    _('ID'),
    _('Type'),
    _('Path'),
    _('Last Changed'),
    _('Date'),
    ]

#-------------------------------------------------------------------------
#
# MediaView
#
#-------------------------------------------------------------------------
class MediaView(PageView.ListView):
    
    ADD_MSG     = _("Add a new media object")
    EDIT_MSG    = _("Edit the selected media object")
    DEL_MSG     = _("Delete the selected media object")
    FILTER_TYPE = 'MediaObject'

    _DND_TYPE = DdTargets.URI_LIST
    
    def __init__(self, dbstate, uistate):

        signal_map = {
            'media-add'     : self.row_add,
            'media-update'  : self.row_update,
            'media-delete'  : self.row_delete,
            'media-rebuild' : self.build_tree,
            }

        PageView.ListView.__init__(
            self, _('Media'), dbstate, uistate,
            column_names,len(column_names), DisplayModels.MediaModel,
            signal_map, dbstate.db.get_media_bookmarks(),
            Bookmarks.MediaBookmarks, filter_class=MediaSidebarFilter)

        Config.client.notify_add("/apps/gramps/interface/filter",
                                 self.filter_toggle)

    def _set_dnd(self):
        """
        Sets up drag-n-drop. The source and destionation are set by calling .target()
        on the _DND_TYPE. Obviously, this means that there must be a _DND_TYPE
        variable defined that points to an entry in DdTargets.
        """

        dnd_types = [ self._DND_TYPE.target() ]

        self.list.drag_dest_set(gtk.DEST_DEFAULT_ALL, dnd_types,
                                gtk.gdk.ACTION_COPY)
        self.list.drag_source_set(gtk.gdk.BUTTON1_MASK,
                                  [self._DND_TYPE.target()],
                                  gtk.gdk.ACTION_COPY)
        self.list.connect('drag_data_get', self.drag_data_get)
        self.list.connect('drag_data_received', self.drag_data_received)

    def drag_data_get(self, widget, context, sel_data, info, time):
        """
        Provide the drag_data_get function, which passes a tuple consisting of:

           1) Drag type defined by the .drag_type field specfied by the value
              assigned to _DND_TYPE
           2) The id value of this object, used for the purpose of determining
              the source of the object. If the source of the object is the same
              as the object, we are doing a reorder instead of a normal drag
              and drop
           3) Pickled data. The pickled version of the selected object
           4) Source row. Used for a reorder to determine the original position
              of the object
        """

        selected_ids = self.selected_handles()
        if selected_ids:
            data = (self.drag_info().drag_type, id(self), selected_ids[0], 0)
            sel_data.set(sel_data.target, 8, pickle.dumps(data))

    def drag_info(self):
        return DdTargets.MEDIAOBJ

    def find_index(self, obj):
        """
        returns the index of the object within the associated data
        """
        return self.model.indexlist[obj]

    def drag_data_received(self, widget, context, x, y, sel_data, info, time):
        """
        Handle the standard gtk interface for drag_data_received.

        If the selection data is define, extract the value from sel_data.data,
        and decide if this is a move or a reorder.
        """

        if sel_data and sel_data.data:
            d = Utils.fix_encoding(sel_data.data.replace('\0',' ').strip())
            protocol, site, mfile, j, k, l = urlparse.urlparse(d)
            if protocol == "file":
                name = Utils.fix_encoding(mfile)
                mime = Mime.get_type(name)
                if not Mime.is_valid_type(mime):
                    return
                photo = RelLib.MediaObject()
                photo.set_path(name)
                photo.set_mime_type(mime)
                basename = os.path.basename(name)
                (root, ext) = os.path.splitext(basename)
                photo.set_description(root)
                trans = self.dbstate.db.transaction_begin()
                self.dbstate.db.add_object(photo, trans)
                self.dbstate.db.transaction_commit(trans,
                                                   _("Drag Media Object"))
        widget.emit_stop_by_name('drag_data_received')
                
    def get_bookmarks(self):
        return self.dbstate.db.get_media_bookmarks()

    def define_actions(self):
        PageView.ListView.define_actions(self)

        self.add_action('ColumnEdit', gtk.STOCK_PROPERTIES,
                        _('_Column Editor'), callback=self.column_editor)
        self.add_action('FilterEdit', None, _('Media Filter Editor'),
                        callback=self.filter_editor)
        self.add_action('OpenMedia', 'gramps-viewmedia', _('View'),
                        callback=self.view_media)
                        
    def view_media(self, obj):
        mlist = []
        self.selection.selected_foreach(self.blist, mlist)

        for handle in mlist:
            ref_obj = self.dbstate.db.get_object_from_handle(handle)
            mime_type = ref_obj.get_mime_type()
            app = Mime.get_application(mime_type)
            if app:
                Utils.launch(app[0], ref_obj.get_path())
	    else:
		ErrorDialog(_("Cannot view %s") % ref_obj.get_path(),
			    _("GRAMPS cannot find an application that can view "
			      "a file type of %s.") % mime_type)

    def column_editor(self, obj):
        import ColumnOrder

        ColumnOrder.ColumnOrder(
            _('Select Media Columns'),
            self.uistate,
            self.dbstate.db.get_media_column_order(),
            column_names,
            self.set_column_order)

    def set_column_order(self, clist):
        self.dbstate.db.set_media_column_order(clist)
        self.build_columns()

    def column_order(self):
        return self.dbstate.db.get_media_column_order()

    def get_stock(self):
        return 'gramps-media'

    def build_widget(self):
        base = PageView.ListView.build_widget(self)
        vbox = gtk.VBox()
        vbox.set_border_width(0)
        vbox.set_spacing(4)

        self.image = gtk.Image()
        self.image.set_size_request(int(const.thumbScale),
                                    int(const.thumbScale))
        ebox = gtk.EventBox()
        ebox.add(self.image)
        ebox.connect('button-press-event', self.button_press_event)
        vbox.pack_start(ebox, False)
        vbox.pack_start(base, True)

        self.tt = gtk.Tooltips()
        self.tt.set_tip(ebox, 
			_('Double click image to view in an external viewer'))

        self.selection.connect('changed', self.row_change)
        self._set_dnd()
        return vbox

    def button_press_event(self, obj, event):
        if event.button == 1 and event.type == gtk.gdk._2BUTTON_PRESS:
            self.view_media(obj)

    def row_change(self, obj):
        handle = self.first_selected()
        if not handle:
            try:
                self.image.clear()
                self.tt.disable()
            except AttributeError:
                # Working around the older pygtk
                # that lacks clear() method for gtk.Image()
                self.image.set_from_file(None)
                self.tt.enable()
        else:
            obj = self.dbstate.db.get_object_from_handle(handle)
            pix = ImgManip.get_thumbnail_image(obj.get_path())
            self.image.set_from_pixbuf(pix)
            self.tt.enable()
    
    def ui_definition(self):
        return '''<ui>
          <menubar name="MenuBar">
            <menu action="EditMenu">
              <placeholder name="CommonEdit">
                <menuitem action="Add"/>
                <menuitem action="Edit"/>
                <menuitem action="Remove"/>
              </placeholder>
              <menuitem action="ColumnEdit"/>
              <menuitem action="FilterEdit"/>
            </menu>
            <menu action="BookMenu">
              <placeholder name="AddEditBook">
                <menuitem action="AddBook"/>
                <menuitem action="EditBook"/>
              </placeholder>
            </menu>
          </menubar>
          <toolbar name="ToolBar">
            <placeholder name="CommonEdit">
              <toolitem action="Add"/>
              <toolitem action="Edit"/>
              <toolitem action="Remove"/>
            </placeholder>
	    <separator/>
	    <toolitem action="OpenMedia"/>
          </toolbar>
          <popup name="Popup">
            <menuitem action="Add"/>
            <menuitem action="Edit"/>
            <menuitem action="OpenMedia"/>
            <menuitem action="Remove"/>
          </popup>
        </ui>'''

    def add(self, obj):
        """Add a new media object to the media list"""
        import AddMedia
        am = AddMedia.AddMediaObject(self.dbstate, self.uistate, [])
        am.run()

    def remove(self, obj):
        handle = self.first_selected()
        if not handle:
            return
        the_lists = Utils.get_media_referents(handle, self.dbstate.db)

        ans = DeleteMediaQuery(self.dbstate,self.uistate,handle,the_lists)
        if filter(None, the_lists): # quick test for non-emptiness
            msg = _('This media object is currently being used. '
                    'If you delete this object, it will be removed from '
                    'the database and from all records that reference it.')
        else:
            msg = _('Deleting media object will remove it from the database.')

        msg = "%s %s" % (msg, Utils.data_recover_msg)
        self.uistate.set_busy_cursor(1)
        QuestionDialog(_('Delete Media Object?'), msg,
                      _('_Delete Media Object'), ans.query_response)
        self.uistate.set_busy_cursor(0)

    def edit(self, obj):
        handle = self.first_selected()
        if not handle:
            return
        
        obj = self.dbstate.db.get_object_from_handle(handle)
        try:
            EditMedia(self.dbstate, self.uistate, [], obj)
        except Errors.WindowActiveError:
            pass