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# Copyright (C) IBM Corporation 2008
from gi.repository import Gtk
from gi.repository import Gdk
from gi.repository import GObject
from gi.repository import GdkPixbuf
import os
import cPickle
import logging
from Editable_Textbox import Editable_Textbox
from infoslicer.processing.Article_Data import *
from infoslicer.processing.Article import Article
import book
logger = logging.getLogger('infoslicer')
class Gallery_View( Gtk.HBox ):
"""
Created by Christopher Leonard
Drag-and-drop methods added by Jonathan Mace
The gallery view acts in the same was as the Reading_View
except instead of displaying the text of an article, it
displays the images associated with that article, in a scrollable display.
Drag-and-drop methods have been added to set up the images as a
drag source. The data returned by drag-data-get will be a list
containing an Image_Data object and a Sentence_Data object. These
correspond to the image and caption respectively.
"""
def __init__(self):
self.image_list = []
GObject.GObject.__init__(self)
self.set_size_request(int(Gdk.Screen.width() / 2), -1)
self.current_index = -1
left_button = Gtk.Button(label="\n\n << \n\n")
right_button = Gtk.Button(label="\n\n >> \n\n")
self.imagenumberlabel = Gtk.Label()
self.image = Gtk.Image()
self.imagebox = Gtk.EventBox()
self.imagebox.add(self.image)
self.imagebox.drag_source_set(Gdk.ModifierType.BUTTON1_MASK,
[],
Gdk.DragAction.COPY)
self.imagebox.drag_source_add_image_targets()
self.imagebox.connect("drag-begin", self.drag_begin_event, None)
logging.debug('##################### Gallery_View.connect')
self.imagebox.connect("drag-data-get", self.drag_data_get_event, None)
self.caption = Gtk.Label(label="")
self.caption.set_size_request(int(Gdk.Screen.width() / 3), -1)
self.caption.set_line_wrap(True)
self.caption.set_max_width_chars(40)
self.image_drag_container = Gtk.VBox()
self.image_drag_container.pack_start(self.imagenumberlabel, expand=False,
fill=False, padding=0)
self.image_drag_container.pack_start(self.imagebox, False, False, 0)
self.image_drag_container.pack_start(self.caption, False, False, 0)
image_container = Gtk.VBox()
image_container.pack_start(Gtk.Label(" "), True, True, 0)
image_container.pack_start(self.image_drag_container, False, True, 0)
image_container.pack_start(Gtk.Label(" "), True, True, 0)
left_button_container = Gtk.VBox()
left_button_container.pack_start(Gtk.Label(" "), True, True, 0)
left_button_container.pack_start(left_button, False, True, 0)
left_button_container.pack_start(Gtk.Label(" "), True, True, 0)
right_button_container = Gtk.VBox()
right_button_container.pack_start(Gtk.Label(" "), True, True, 0)
right_button_container.pack_start(right_button, False, True, 0)
right_button_container.pack_start(Gtk.Label(" "), True, True, 0)
self.pack_start(left_button_container, False, True, 0)
self.pack_start(image_container, True, True, 0)
self.pack_start(right_button_container, False, True, 0)
self._source_article = None
self.show_all()
right_button.connect("clicked", self.get_next_item, None)
left_button.connect("clicked", self.get_prev_item, None)
self.get_next_item(right_button, None)
self.source_article_id = 0
def get_next_item(self, button, param):
if self.image_list == []:
if self._source_article and self._source_article.article_title:
self.caption.set_text("This article does not have any images")
else:
self.caption.set_text("Please select a Wikipedia article from the menu above")
self.image.clear()
return
self.current_index += 1
if self.current_index == len(self.image_list):
self.current_index = 0
self.imagebuf = GdkPixbuf.Pixbuf.new_from_file(self.image_list[self.current_index][0])
self.image.set_from_pixbuf(self.imagebuf)
self.caption.set_text("\n" + self.image_list[self.current_index][1])
self.imagenumberlabel.set_text("(%d / %d)\n" % (self.current_index+1, len(self.image_list)))
def get_prev_item(self, button, param):
if self.image_list == []:
if self._source_article and self._source_article.article_title:
self.caption.set_text("This article does not have any images")
else:
self.caption.set_text("Please select a Wikipedia article from the menu above")
self.image.clear()
return
if self.current_index == 0:
self.current_index = len(self.image_list)
self.current_index -= 1
self.imagebuf = GdkPixbuf.Pixbuf.new_from_file(self.image_list[self.current_index][0])
self.image.set_from_pixbuf(self.imagebuf)
self.caption.set_text("\n" + self.image_list[self.current_index][1])
self.imagenumberlabel.set_text("(%d / %d)\n" % (self.current_index+1, len(self.image_list)))
def get_first_item(self):
if self.image_list == []:
if self._source_article and self._source_article.article_title:
self.caption.set_text("This article does not have any images")
else:
self.caption.set_text("Please select a Wikipedia article from the menu above")
self.image.clear()
return
self.current_index = 0
self.imagebuf = GdkPixbuf.Pixbuf.new_from_file(self.image_list[self.current_index][0])
self.image.set_from_pixbuf(self.imagebuf)
self.caption.set_text("\n" + self.image_list[self.current_index][1])
logger.debug("setting text to:")
logger.debug("(%d / %d)\n" %
(self.current_index+1, len(self.image_list)))
self.imagenumberlabel.set_text("(%d / %d)\n" % (self.current_index+1, len(self.image_list)))
def set_image_list(self, image_list):
logger.debug("validagting image list")
self.image_list = _validate_image_list(book.wiki.root, image_list)
logger.debug(self.image_list)
def drag_begin_event(self, widget, context, data):
logging.debug('########### Gallery_View.drag_begin_event called')
self.imagebox.drag_source_set_icon_pixbuf(self.imagebuf)
def drag_data_get_event(self, widget, context, selection_data, info, timestamp, data):
logger.debug('############# Gallery_View.drag_data_get_event')
atom = Gdk.atom_intern("section", only_if_exists=False)
imagedata = Picture_Data(self.source_article_id,
self.image_list[self.current_index][0],
self.image_list[self.current_index][2])
captiondata = Sentence_Data(0, self.source_article_id, 0, 0, 0, self.image_list[self.current_index][1])
paragraph1data = Paragraph_Data(0, self.source_article_id, 0, 0, [imagedata])
paragraph2data = Paragraph_Data(0, self.source_article_id, 0, 0, [captiondata])
sectionsdata = [Section_Data(0, self.source_article_id, 0, [paragraph1data, paragraph2data])]
string = cPickle.dumps(sectionsdata)
selection_data.set(atom, 8, string)
def _validate_image_list(root, image_list):
"""
provides a mechanism for validating image lists and expanding relative paths
@param image_list: list of images to validate
@return: list of images with corrected paths, and broken images removed
"""
for i in xrange(len(image_list)):
if not os.access(image_list[i][0], os.F_OK):
if os.access(os.path.join(root, image_list[i][0]), os.F_OK):
image_list[i] = (os.path.join(root, image_list[i][0]),
image_list[i][1], image_list[i][2])
else:
image = None
#removing during for loop was unreliable
while None in image_list:
image_list.remove(None)
return image_list
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