def scroll_smartly(self, max_scroll, backwards, axis_map, index=None):
""" Applies a "smart scrolling" step to the current viewport position.
If there are not enough Boxes to scroll to, the viewport is not moved
and an appropriate value is returned.
@param max_scroll: The maximum numbers of pixels to scroll in one step.
@param backwards: True for backwards scrolling, False otherwise.
@param axis_map: The index of the dimension to modify.
@param index: The index of the Box the scrolling step is related to,
or None to use the index of the current Box.
@return: The index of the current Box after scrolling, or -1 if there
were not enough Boxes to scroll backwards, or the number of Boxes if
there were not enough Boxes to scroll forwards. """
# TODO reconsider interface
if (index == None) or (not self.wrap_individually):
index = self.get_current_index()
if not self.wrap_individually:
wrapper_index = 0
else:
wrapper_index = index
o = tools.vector_opposite(self.orientation) if backwards \
else self.orientation
new_pos = self.scroller.scroll_smartly(self.wrapper_boxes[wrapper_index],
self.viewport_box, o, max_scroll, axis_map)
if new_pos == []:
if self.wrap_individually:
index += -1 if backwards else 1
n = len(self.get_content_boxes())
if (index < n) and (index >= 0):
self.scroll_to_predefined(tools.vector_opposite(o), index)
return index
else:
index = -1 if backwards else len(self.get_content_boxes())
return index
self.set_viewport_position(new_pos)
return index
def scroll_smartly(self, max_scroll, backwards, axis_map, index=None):
""" Applies a "smart scrolling" step to the current viewport position.
If there are not enough Boxes to scroll to, the viewport is not moved
and an appropriate value is returned.
@param max_scroll: The maximum numbers of pixels to scroll in one step.
@param backwards: True for backwards scrolling, False otherwise.
@param axis_map: The index of the dimension to modify.
@param index: The index of the Box the scrolling step is related to,
or None to use the index of the current Box.
@return: The index of the current Box after scrolling, or -1 if there
were not enough Boxes to scroll backwards, or the number of Boxes if
there were not enough Boxes to scroll forwards. """
# TODO reconsider interface
if (index == None) or (not self.wrap_individually):
index = self.get_current_index()
if not self.wrap_individually:
wrapper_index = 0
else:
wrapper_index = index
o = tools.vector_opposite(self.orientation) if backwards \
else self.orientation
new_pos = self.scroller.scroll_smartly(self.wrapper_boxes[wrapper_index],
self.viewport_box, o, max_scroll, axis_map)
if new_pos == []:
if self.wrap_individually:
index += -1 if backwards else 1
n = len(self.get_content_boxes())
if (index < n) and (index >= 0):
self.scroll_to_predefined(tools.vector_opposite(o), index)
return index
else:
index = -1 if backwards else len(self.get_content_boxes())
return index
self.set_viewport_position(new_pos)
return index
def _draw_image(self, scroll_to):
self._update_toggles_visibility()
self.osd.clear()
if not self.filehandler.file_loaded:
self._clear_main_area()
self._waiting_for_redraw = False
return False
if self.imagehandler.page_is_available():
distribution_axis = constants.DISTRIBUTION_AXIS
alignment_axis = constants.ALIGNMENT_AXIS
pixbuf_count = 2 if self.displayed_double(
) else 1 # XXX limited to at most 2 pages
pixbuf_list = list(self.imagehandler.get_pixbufs(pixbuf_count))
do_not_transform = [
image_tools.disable_transform(x) for x in pixbuf_list
]
size_list = [[pixbuf.get_width(),
pixbuf.get_height()] for pixbuf in pixbuf_list]
if self.is_manga_mode:
orientation = constants.MANGA_ORIENTATION
else:
orientation = constants.WESTERN_ORIENTATION
# Rotation handling:
# - apply Exif rotation on individual images
# - apply automatic rotation (size based) on whole page
# - apply manual rotation on whole page
if prefs['auto rotate from exif']:
rotation_list = [
image_tools.get_implied_rotation(pixbuf)
for pixbuf in pixbuf_list
]
else:
rotation_list = [0] * len(pixbuf_list)
virtual_size = [0, 0]
for i in range(pixbuf_count):
if rotation_list[i] in (90, 270):
size_list[i].reverse()
size = size_list[i]
virtual_size[distribution_axis] += size[distribution_axis]
virtual_size[alignment_axis] = max(
virtual_size[alignment_axis], size[alignment_axis])
rotation = self._get_size_rotation(*virtual_size)
rotation = (rotation + prefs['rotation']) % 360
if rotation in (90, 270):
distribution_axis, alignment_axis = alignment_axis, distribution_axis
orientation = list(orientation)
orientation.reverse()
for i in range(pixbuf_count):
size_list[i].reverse()
if rotation in (180, 270):
orientation = tools.vector_opposite(orientation)
for i in range(pixbuf_count):
rotation_list[i] = (rotation_list[i] + rotation) % 360
if prefs['vertical flip'] and rotation in (90, 270):
orientation = tools.vector_opposite(orientation)
if prefs['horizontal flip'] and rotation in (0, 180):
orientation = tools.vector_opposite(orientation)
viewport_size = () # dummy
expand_area = False
scrollbar_requests = [False] * len(self._scroll)
# Visible area size is recomputed depending on scrollbar visibility
while True:
self._show_scrollbars(scrollbar_requests)
new_viewport_size = self.get_visible_area_size()
if new_viewport_size == viewport_size:
break
viewport_size = new_viewport_size
zoom_dummy_size = list(viewport_size)
dasize = zoom_dummy_size[distribution_axis] - \
self._spacing * (pixbuf_count - 1)
if dasize <= 0:
dasize = 1
zoom_dummy_size[distribution_axis] = dasize
scaled_sizes = self.zoom.get_zoomed_size(
size_list, zoom_dummy_size, distribution_axis,
do_not_transform)
self.layout = layout.FiniteLayout(scaled_sizes, viewport_size,
orientation, self._spacing,
expand_area,
distribution_axis,
alignment_axis)
union_scaled_size = self.layout.get_union_box().get_size()
scrollbar_requests = [(old or new) for old, new in zip(
scrollbar_requests,
tools.smaller(viewport_size, union_scaled_size))]
if len(tuple(filter(
None, scrollbar_requests))) > 1 and not expand_area:
expand_area = True
viewport_size = () # start anew
for i in range(pixbuf_count):
pixbuf_list[i] = image_tools.fit_pixbuf_to_rectangle(
pixbuf_list[i], scaled_sizes[i], rotation_list[i])
for i in range(pixbuf_count):
pixbuf_list[i] = image_tools.trans_pixbuf(
pixbuf_list[i],
flip=prefs['vertical flip'],
flop=prefs['horizontal flip'])
pixbuf_list[i] = self.enhancer.enhance(pixbuf_list[i])
for i in range(pixbuf_count):
image_tools.set_from_pixbuf(self.images[i], pixbuf_list[i])
resolutions = [
(*size, scaled_size[0] / size[0])
for scaled_size, size in zip(scaled_sizes, size_list)
]
if self.is_manga_mode:
resolutions.reverse()
self.statusbar.set_resolution(resolutions)
self.statusbar.update()
smartbg = prefs['smart bg']
smartthumbbg = prefs['show thumbnails'] and prefs['smart thumb bg']
if smartbg or smartthumbbg:
bg_color = self.imagehandler.get_pixbuf_auto_background(
pixbuf_count)
if smartbg:
self.set_bg_color(bg_color)
if smartthumbbg:
self.thumbnailsidebar.change_thumbnail_background_color(
bg_color)
self._main_layout.get_bin_window().freeze_updates()
self._main_layout.set_size(*union_scaled_size)
content_boxes = self.layout.get_content_boxes()
for i in range(pixbuf_count):
self._main_layout.move(self.images[i],
*content_boxes[i].get_position())
for i in range(pixbuf_count):
self.images[i].show()
for i in range(pixbuf_count, len(self.images)):
self.images[i].hide()
# Reset orientation so scrolling behaviour is sane.
if self.is_manga_mode:
self.layout.set_orientation(constants.MANGA_ORIENTATION)
else:
self.layout.set_orientation(constants.WESTERN_ORIENTATION)
if scroll_to is not None:
destination = (scroll_to, ) * 2
if constants.SCROLL_TO_START == scroll_to:
index = constants.FIRST_INDEX
elif constants.SCROLL_TO_END == scroll_to:
index = constants.LAST_INDEX
else:
index = None
self.scroll_to_predefined(destination, index)
self._main_layout.get_bin_window().thaw_updates()
else:
# Save scroll destination for when the page becomes available.
self._last_scroll_destination = scroll_to
# If the pixbuf for the current page(s) isn't available,
# hide all images to clear any old pixbufs.
# XXX How about calling self._clear_main_area?
for i in range(len(self.images)):
self.images[i].hide()
self._show_scrollbars([False] * len(self._scroll))
self._waiting_for_redraw = False
return False
def _draw_image(self, scroll_to):
self._update_toggles_visibility()
if not self.filehandler.file_loaded:
self._clear_main_area()
self._waiting_for_redraw = False
return False
if self.imagehandler.page_is_available():
distribution_axis = constants.DISTRIBUTION_AXIS
alignment_axis = constants.ALIGNMENT_AXIS
pixbuf_count = 2 if self.displayed_double() else 1 # XXX limited to at most 2 pages
pixbuf_list = list(self.imagehandler.get_pixbufs(pixbuf_count))
size_list = [[pixbuf.get_width(), pixbuf.get_height()]
for pixbuf in pixbuf_list]
if self.is_manga_mode:
orientation = constants.MANGA_ORIENTATION
else:
orientation = constants.WESTERN_ORIENTATION
# Rotation handling:
# - apply Exif rotation on individual images
# - apply automatic rotation (size based) on whole page
# - apply manual rotation on whole page
if prefs['auto rotate from exif']:
rotation_list = [image_tools.get_implied_rotation(pixbuf)
for pixbuf in pixbuf_list]
else:
rotation_list = [0] * len(pixbuf_list)
virtual_size = [0, 0]
for i in range(pixbuf_count):
if rotation_list[i] in (90, 270):
size_list[i].reverse()
size = size_list[i]
virtual_size[distribution_axis] += size[distribution_axis]
virtual_size[alignment_axis] = max(virtual_size[alignment_axis],
size[alignment_axis])
rotation = self._get_size_rotation(*virtual_size)
rotation = (rotation + prefs['rotation']) % 360
if rotation in (90, 270):
distribution_axis, alignment_axis = alignment_axis, distribution_axis
orientation = list(orientation)
orientation.reverse()
for i in range(pixbuf_count):
size_list[i].reverse()
if rotation in (180, 270):
orientation = tools.vector_opposite(orientation)
for i in range(pixbuf_count):
rotation_list[i] = (rotation_list[i] + rotation) % 360
if prefs['vertical flip'] and rotation in (90, 270):
orientation = tools.vector_opposite(orientation)
if prefs['horizontal flip'] and rotation in (0, 180):
orientation = tools.vector_opposite(orientation)
viewport_size = () # dummy
expand_area = False
scrollbar_requests = [False] * len(self._scroll)
# Visible area size is recomputed depending on scrollbar visibility
while True:
self._show_scrollbars(scrollbar_requests)
new_viewport_size = self.get_visible_area_size()
if new_viewport_size == viewport_size:
break
viewport_size = new_viewport_size
zoom_dummy_size = list(viewport_size)
dasize = zoom_dummy_size[distribution_axis] - \
self._spacing * (pixbuf_count - 1)
if dasize <= 0:
dasize = 1
zoom_dummy_size[distribution_axis] = dasize
scaled_sizes = self.zoom.get_zoomed_size(size_list, zoom_dummy_size,
distribution_axis)
self.layout = layout.FiniteLayout(scaled_sizes,
viewport_size,
orientation,
self._spacing,
expand_area,
distribution_axis,
alignment_axis)
union_scaled_size = self.layout.get_union_box().get_size()
scrollbar_requests = map(operator.or_, scrollbar_requests,
tools.smaller(viewport_size, union_scaled_size))
if len(filter(None, scrollbar_requests)) > 1 and not expand_area:
expand_area = True
viewport_size = () # start anew
for i in range(pixbuf_count):
pixbuf_list[i] = image_tools.fit_pixbuf_to_rectangle(
pixbuf_list[i], scaled_sizes[i], rotation_list[i])
for i in range(pixbuf_count):
if prefs['horizontal flip']:
pixbuf_list[i] = pixbuf_list[i].flip(horizontal=True)
if prefs['vertical flip']:
pixbuf_list[i] = pixbuf_list[i].flip(horizontal=False)
pixbuf_list[i] = self.enhancer.enhance(pixbuf_list[i])
for i in range(pixbuf_count):
image_tools.set_from_pixbuf(self.images[i], pixbuf_list[i])
scales = tuple(map(lambda x, y: math.sqrt(tools.div(
tools.volume(x), tools.volume(y))), scaled_sizes, size_list))
resolutions = tuple(map(lambda x, y: x + [y,], size_list, scales))
if self.is_manga_mode:
resolutions = tuple(reversed(resolutions))
self.statusbar.set_resolution(resolutions)
self.statusbar.update()
smartbg = prefs['smart bg']
smartthumbbg = prefs['smart thumb bg'] and prefs['show thumbnails']
if smartbg or smartthumbbg:
bg_colour = self.imagehandler.get_pixbuf_auto_background(pixbuf_count)
if smartbg:
self.set_bg_colour(bg_colour)
if smartthumbbg:
self.thumbnailsidebar.change_thumbnail_background_color(bg_colour)
self._main_layout.window.freeze_updates()
self._main_layout.set_size(*union_scaled_size)
content_boxes = self.layout.get_content_boxes()
for i in range(pixbuf_count):
self._main_layout.move(self.images[i],
*content_boxes[i].get_position())
for i in range(pixbuf_count):
self.images[i].show()
for i in range(pixbuf_count, len(self.images)):
self.images[i].hide()
# Reset orientation so scrolling behaviour is sane.
if self.is_manga_mode:
self.layout.set_orientation(constants.MANGA_ORIENTATION)
else:
self.layout.set_orientation(constants.WESTERN_ORIENTATION)
if scroll_to is not None:
destination = (scroll_to,) * 2
if constants.SCROLL_TO_START == scroll_to:
index = constants.FIRST_INDEX
elif constants.SCROLL_TO_END == scroll_to:
index = constants.LAST_INDEX
else:
index = None
self.scroll_to_predefined(destination, index)
self._main_layout.window.thaw_updates()
else:
# Save scroll destination for when the page becomes available.
self._last_scroll_destination = scroll_to
# If the pixbuf for the current page(s) isn't available,
# hide all images to clear any old pixbufs.
# XXX How about calling self._clear_main_area?
for i in range(len(self.images)):
self.images[i].hide()
self._show_scrollbars([False] * len(self._scroll))
self._waiting_for_redraw = False
return False