/usr/lib/python2.7/dist-packages/ginga/rv/plugins/Thumbs.py is in python-ginga 2.6.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Thumbs.py -- Thumbs plugin for Ginga image viewer
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
#
import os
import threading
from ginga import GingaPlugin
from ginga.misc import Bunch
from ginga.util import iohelper
from ginga.gw import Widgets, Viewers
class Thumbs(GingaPlugin.GlobalPlugin):
def __init__(self, fv):
# superclass defines some variables for us, like logger
super(Thumbs, self).__init__(fv)
# For thumbnail pane
self.thumbDict = {}
self.thumbList = []
self.thumbRowList = []
self.thumbNumRows = 20
self.thumbNumCols = 1
self.thumbRowCount = 0
self.thumbColCount = 0
# distance in pixels between thumbs
self.thumbSep = 15
tt_keywords = ['OBJECT', 'FRAMEID', 'UT', 'DATE-OBS']
prefs = self.fv.get_preferences()
self.settings = prefs.createCategory('plugin_Thumbs')
self.settings.addDefaults(cache_thumbs=False,
cache_location='local',
auto_scroll=True,
rebuild_wait=4.0,
tt_keywords=tt_keywords,
mouseover_name_key='NAME',
thumb_length=192,
sort_order=None,
label_length=25,
label_cutoff='right',
highlight_tracks_keyboard_focus=True,
label_font_color='black',
label_bg_color='lightgreen')
self.settings.load(onError='silent')
# max length of thumb on the long side
self.thumbWidth = self.settings.get('thumb_length', 150)
self.thmbtask = fv.get_timer()
self.thmbtask.set_callback('expired', self.redo_delay_timer)
self.lagtime = self.settings.get('rebuild_wait', 4.0)
self.thmblock = threading.RLock()
# TODO: these maybe should be configurable by channel
# different instruments have different keywords of interest
self.keywords = self.settings.get('tt_keywords', tt_keywords)
self.keywords.insert(0, self.settings.get('mouseover_name_key', 'NAME'))
self.highlight_tracks_keyboard_focus = self.settings.get(
'highlight_tracks_keyboard_focus', True)
self._tkf_highlight = set([])
fv.set_callback('add-image', self.add_image_cb)
fv.set_callback('add-image-info', self.add_image_info_cb)
fv.set_callback('remove-image', self.remove_image_cb)
fv.set_callback('add-channel', self.add_channel_cb)
fv.set_callback('delete-channel', self.delete_channel_cb)
fv.add_callback('channel-change', self.focus_cb)
self.gui_up = False
def build_gui(self, container):
# width, height = 300, 300
# cm, im = self.fv.cm, self.fv.im
thumb_len = self.settings.get('thumb_length', 192)
tg = Viewers.ImageViewCanvas(logger=self.logger)
tg.configure_window(thumb_len, thumb_len)
tg.enable_autozoom('on')
tg.set_autocut_params('zscale')
tg.enable_autocuts('override')
tg.enable_auto_orient(True)
tg.defer_redraw = False
tg.set_bg(0.7, 0.7, 0.7)
self.thumb_generator = tg
sw = Widgets.ScrollArea()
sw.add_callback('configure', self.thumbpane_resized_cb)
# Create thumbnails pane
vbox = Widgets.GridBox()
vbox.set_margins(4, 4, 4, 4)
vbox.set_column_spacing(14)
self.w.thumbs = vbox
sw.set_widget(vbox)
self.w.thumbs_scroll = sw
container.add_widget(sw, stretch=1)
captions = (('Auto scroll', 'checkbutton', 'Clear', 'button'),)
w, b = Widgets.build_info(captions)
self.w.update(b)
b.auto_scroll.set_tooltip(
"Scroll the thumbs window when new images arrive")
b.clear.set_tooltip("Remove all current thumbnails")
b.clear.add_callback('activated', lambda w: self.clear())
auto_scroll = self.settings.get('auto_scroll', True)
b.auto_scroll.set_state(auto_scroll)
container.add_widget(w, stretch=0)
self.gui_up = True
def _get_thumb_key(self, chname, image):
path = image.get('path', None)
return self.get_thumb_key(chname, image.get('name'), path)
def get_thumb_key(self, chname, imname, path):
if path is not None:
path = os.path.abspath(path)
thumbkey = (chname, imname, path)
return thumbkey
def add_image_cb(self, viewer, chname, image, image_info):
if not self.gui_up:
return False
# image is flagged not to make a thumbnail?
nothumb = image.get('nothumb', False)
if nothumb:
return
# idx = image.get('idx', None)
# get image path
path = image_info.path
if path is not None:
path = os.path.abspath(path)
name = image_info.name
thumbname = name
self.logger.info("making thumb for %s" % (thumbname))
future = image_info.image_future
# Is there a preference set to avoid making thumbnails?
chinfo = self.fv.get_channel(chname)
prefs = chinfo.settings
if not prefs.get('genthumb', False):
return
# Is this thumbnail already in the list?
# NOTE: does not handle two separate images with the same path
# in the same channel
thumbkey = self.get_thumb_key(chname, name, path)
with self.thmblock:
if thumbkey in self.thumbDict:
return
# Get metadata for mouse-over tooltip
header = image.get_header()
metadata = {}
for kwd in self.keywords:
metadata[kwd] = header.get(kwd, 'N/A')
metadata[self.settings.get('mouseover_name_key', 'NAME')] = name
thumbpath = self.get_thumbpath(path)
with self.thmblock:
self.copy_attrs(chinfo.fitsimage)
thumb_np = image.get_thumbnail(self.thumbWidth)
self.thumb_generator.set_data(thumb_np)
imgwin = self.thumb_generator.get_plain_image_as_widget()
label_length = self.settings.get('label_length', None)
label_cutoff = self.settings.get('label_cutoff', 'right')
# Shorten thumbnail label, if requested
if label_length is not None:
thumbname = iohelper.shorten_name(thumbname, label_length,
side=label_cutoff)
self.insert_thumbnail(imgwin, thumbkey, thumbname, chname, name, path,
thumbpath, metadata, future)
def _add_image(self, viewer, chname, image):
chinfo = self.fv.get_channel(chname)
try:
info = chinfo.get_image_info(image.name)
except KeyError:
return
self.add_image_cb(viewer, chname, image, info)
def remove_image_cb(self, viewer, chname, name, path):
if not self.gui_up:
return
self.logger.info("removing thumb for %s" % (name))
try:
# Is this thumbnail already in the list?
thumbkey = self.get_thumb_key(chname, name, path)
self.remove_thumb(thumbkey)
except Exception as e:
self.logger.error("Error removing thumb for %s: %s" % (
name, str(e)))
def remove_thumb(self, thumbkey):
with self.thmblock:
if thumbkey not in self.thumbDict:
return
self.clear_widget()
del self.thumbDict[thumbkey]
self.thumbList.remove(thumbkey)
# Unhighlight
chname = thumbkey[0]
channel = self.fv.get_channel(chname)
self._tkf_highlight.discard(thumbkey)
channel.extdata.thumbs_old_highlight.discard(thumbkey)
self.reorder_thumbs()
def update_thumbs(self, nameList):
# Remove old thumbs that are not in the dataset
invalid = set(self.thumbList) - set(nameList)
if len(invalid) > 0:
with self.thmblock:
for thumbkey in invalid:
self.thumbList.remove(thumbkey)
del self.thumbDict[thumbkey]
self._tkf_highlight.discard(thumbkey)
self.reorder_thumbs()
def thumbpane_resized_cb(self, widget, width, height):
self.logger.info("reordering thumbs width=%d" % (width))
with self.thmblock:
cols = max(1, width // (self.thumbWidth + self.thumbSep))
if self.thumbNumCols == cols:
# If we have not actually changed the possible number of columns
# then don't do anything
return False
self.logger.info("column count is now %d" % (cols))
self.thumbNumCols = cols
self.reorder_thumbs()
return False
def load_file(self, thumbkey, chname, name, path, image_future):
self.logger.debug("loading image: %s" % (str(thumbkey)))
self.fv.switch_name(chname, name, path=path,
image_future=image_future)
def clear(self):
with self.thmblock:
self.clear_widget()
self.thumbList = []
self.thumbDict = {}
self._tkf_highlight = set([])
self.reorder_thumbs()
def add_channel_cb(self, viewer, chinfo):
"""Called when a channel is added from the main interface.
Parameter is chinfo (a bunch)."""
fitsimage = chinfo.fitsimage
fitssettings = fitsimage.get_settings()
for name in ['cuts']:
fitssettings.getSetting(name).add_callback(
'set', self.cutset_cb, fitsimage)
fitsimage.add_callback('transform', self.transform_cb)
rgbmap = fitsimage.get_rgbmap()
rgbmap.add_callback('changed', self.rgbmap_cb, fitsimage)
# add old highlight set to channel external data
chinfo.extdata.setdefault('thumbs_old_highlight', set([]))
def focus_cb(self, viewer, channel):
# Reflect transforms, colormap, etc.
fitsimage = channel.fitsimage
image = channel.get_current_image()
if image is not None:
chname = channel.name
thumbkey = self._get_thumb_key(chname, image)
new_highlight = set([thumbkey])
# TODO: already calculated thumbkey, use simpler test
if not self.have_thumbnail(fitsimage, image):
# No memory of this thumbnail, so regenerate it
self._add_image(viewer, chname, image)
return
# Else schedule an update of the thumbnail for changes to
# cut levels, etc.
self.redo_delay(fitsimage)
else:
# no image has the focus
new_highlight = set([])
if self.highlight_tracks_keyboard_focus:
self.update_highlights(self._tkf_highlight, new_highlight)
self._tkf_highlight = new_highlight
def transform_cb(self, fitsimage):
self.redo_delay(fitsimage)
return True
def cutset_cb(self, setting, value, fitsimage):
self.redo_delay(fitsimage)
return True
def rgbmap_cb(self, rgbmap, fitsimage):
# color mapping has changed in some way
self.redo_delay(fitsimage)
return True
def redo_delay(self, fitsimage):
# Delay regeneration of thumbnail until most changes have propagated
self.thmbtask.data.setvals(fitsimage=fitsimage)
self.thmbtask.set(self.lagtime)
return True
def redo_delay_timer(self, timer):
self.fv.gui_do(self.redo_thumbnail, timer.data.fitsimage)
def copy_attrs(self, fitsimage):
# Reflect transforms, colormap, etc.
fitsimage.copy_attributes(self.thumb_generator,
['transforms', 'cutlevels',
'rgbmap'])
def update_highlights(self, old_highlight_set, new_highlight_set):
"""Unhighlight the thumbnails represented by `old_highlight_set`
and highlight the ones represented by new_highlight_set.
Both are sets of thumbkeys.
"""
with self.thmblock:
un_hilite_set = old_highlight_set - new_highlight_set
re_hilite_set = new_highlight_set - old_highlight_set
# unhighlight thumb labels that should NOT be highlighted any more
for thumbkey in un_hilite_set:
if thumbkey in self.thumbDict:
namelbl = self.thumbDict[thumbkey].get('namelbl')
namelbl.set_color(bg=None, fg=None)
# highlight new labels that should be
bg = self.settings.get('label_bg_color', 'lightgreen')
fg = self.settings.get('label_font_color', 'black')
for thumbkey in re_hilite_set:
if thumbkey in self.thumbDict:
namelbl = self.thumbDict[thumbkey].get('namelbl')
namelbl.set_color(bg=bg, fg=fg)
def redo(self, channel, image):
"""This method is called when an image is set in a channel."""
self.logger.debug("image set")
chname = channel.name
# get old highlighted thumbs for this channel -- will be
# an empty set or one thumbkey
old_highlight = channel.extdata.thumbs_old_highlight
# calculate new highlight thumbkeys -- again, an empty set
# or one thumbkey
if image is not None:
thumbkey = self._get_thumb_key(chname, image)
new_highlight = set([thumbkey])
else:
# no image has the focus
new_highlight = set([])
# TODO: already calculated thumbkey, use simpler test
if not self.have_thumbnail(channel.fitsimage, image):
# No memory of this thumbnail, so regenerate it
self._add_image(self.fv, chname, image)
self.logger.debug("highlighting")
# Only highlights active image in the current channel
if self.highlight_tracks_keyboard_focus:
self.update_highlights(self._tkf_highlight, new_highlight)
self._tkf_highlight = new_highlight
# Highlight all active images in all channels
else:
self.update_highlights(old_highlight, new_highlight)
channel.extdata.thumbs_old_highlight = new_highlight
def have_thumbnail(self, fitsimage, image):
"""Returns True if we already have a thumbnail version of this image
cached, False otherwise.
"""
chname = self.fv.get_channel_name(fitsimage)
# Look up our version of the thumb
idx = image.get('idx', None)
path = image.get('path', None)
if path is not None:
path = os.path.abspath(path)
name = self.fv.name_image_from_path(path, idx=idx)
else:
name = 'NoName'
# get image name
name = image.get('name', name)
thumbkey = self.get_thumb_key(chname, name, path)
with self.thmblock:
return thumbkey in self.thumbDict
def redo_thumbnail(self, fitsimage, save_thumb=None):
self.logger.debug("redoing thumbnail...")
# Get the thumbnail image
image = fitsimage.get_image()
if image is None:
return
if save_thumb is None:
save_thumb = self.settings.get('cache_thumbs', False)
chname = self.fv.get_channel_name(fitsimage)
# Get metadata for mouse-over tooltip
header = image.get_header()
metadata = {}
for kwd in self.keywords:
metadata[kwd] = header.get(kwd, 'N/A')
# Look up our version of the thumb
idx = image.get('idx', None)
path = image.get('path', None)
if path is not None:
path = os.path.abspath(path)
name = self.fv.name_image_from_path(path, idx=idx)
else:
name = 'NoName'
# get image name
name = image.get('name', name)
metadata[self.settings.get('mouseover_name_key', 'NAME')] = name
thumbkey = self.get_thumb_key(chname, name, path)
with self.thmblock:
if thumbkey not in self.thumbDict:
# No memory of this thumbnail, so regenerate it
self._add_image(self.fv, chname, image)
return
# Generate new thumbnail
fitsimage.copy_attributes(self.thumb_generator,
['transforms', 'cutlevels',
'rgbmap'])
thumb_np = image.get_thumbnail(self.thumbWidth)
self.thumb_generator.set_data(thumb_np)
# Save a thumbnail for future browsing
if save_thumb:
thumbpath = self.get_thumbpath(path)
if thumbpath is not None:
if os.path.exists(thumbpath):
os.remove(thumbpath)
self.thumb_generator.save_plain_image_as_file(thumbpath,
format='jpeg')
imgwin = self.thumb_generator.get_plain_image_as_widget()
self.update_thumbnail(thumbkey, imgwin, name, metadata)
def delete_channel_cb(self, viewer, chinfo):
"""Called when a channel is deleted from the main interface.
Parameter is chinfo (a bunch)."""
chname_del = chinfo.name
# TODO: delete thumbs for this channel!
self.logger.info("deleting thumbs for channel '%s'" % (chname_del))
with self.thmblock:
self.clear_widget()
newThumbList = []
un_hilite_set = set([])
for thumbkey in self.thumbList:
chname = thumbkey[0]
if chname != chname_del:
newThumbList.append(thumbkey)
else:
del self.thumbDict[thumbkey]
un_hilite_set.add(thumbkey)
self.thumbList = newThumbList
self._tkf_highlight -= un_hilite_set # Unhighlight
self.reorder_thumbs()
def _make_thumb(self, chname, image, name, path, thumbkey,
image_future, save_thumb=False, thumbpath=None):
# This is called by the make_thumbs() as a gui thread
with self.thmblock:
thumb_np = image.get_thumbnail(self.thumbWidth)
self.thumb_generator.set_data(thumb_np)
# Save a thumbnail for future browsing
if save_thumb and (thumbpath is not None):
self.thumb_generator.save_plain_image_as_file(thumbpath,
format='jpeg')
imgwin = self.thumb_generator.get_plain_image_as_widget()
# Get metadata for mouse-over tooltip
header = image.get_header()
metadata = {}
for kwd in self.keywords:
metadata[kwd] = header.get(kwd, 'N/A')
thumbname = name
self.insert_thumbnail(imgwin, thumbkey, thumbname,
chname, name, path, thumbpath, metadata,
image_future)
self.fv.update_pending(timeout=0.001)
def get_thumbpath(self, path, makedir=True):
if path is None:
return None
path = os.path.abspath(path)
dirpath, filename = os.path.split(path)
# Get thumb directory
cache_location = self.settings.get('cache_location', 'local')
if cache_location == 'ginga':
# thumbs in .ginga cache
prefs = self.fv.get_preferences()
thumbDir = os.path.join(prefs.get_baseFolder(), 'thumbs')
thumbdir = os.path.join(thumbDir, iohelper.gethex(dirpath))
else:
# thumbs in .thumbs subdirectory of image folder
thumbdir = os.path.join(dirpath, '.thumbs')
try:
thumbpath = iohelper.get_thumbpath(thumbdir, path,
makedir=makedir)
except Exception as e:
self.logger.debug("Error getting thumb path for '%s': %s" % (
path, str(e)))
thumbpath = None
return thumbpath
def insert_thumbnail(self, imgwin, thumbkey, thumbname, chname, name, path,
thumbpath, metadata, image_future):
# make a context menu
menu = self._mk_context_menu(thumbkey, chname, name, path, image_future)
thumbw = Widgets.Image(native_image=imgwin, menu=menu,
style='clickable')
thumbw.resize(self.thumbWidth, self.thumbWidth)
# set the load callback
thumbw.add_callback('activated',
lambda w: self.load_file(thumbkey, chname, name,
path, image_future))
# make a tool tip
text = self.query_thumb(thumbkey, name, metadata)
thumbw.set_tooltip(text)
vbox = Widgets.VBox()
vbox.set_margins(0, 0, 0, 0)
vbox.set_spacing(0)
namelbl = Widgets.Label(text=thumbname, halign='left')
vbox.add_widget(namelbl, stretch=0)
vbox.add_widget(thumbw, stretch=0)
# special hack for Qt widgets
vbox.cfg_expand(0, 0)
bnch = Bunch.Bunch(widget=vbox, image=thumbw,
name=name, imname=name, namelbl=namelbl,
chname=chname, path=path, thumbpath=thumbpath,
image_future=image_future)
with self.thmblock:
self.thumbDict[thumbkey] = bnch
self.thumbList.append(thumbkey)
sort_order = self.settings.get('sort_order', None)
if sort_order:
self.thumbList.sort()
self.reorder_thumbs()
return
self.w.thumbs.add_widget(vbox,
self.thumbRowCount, self.thumbColCount)
self.thumbColCount = (self.thumbColCount + 1) % self.thumbNumCols
if self.thumbColCount == 0:
self.thumbRowCount += 1
self._auto_scroll()
self.logger.debug("added thumb for %s" % (name))
def _auto_scroll(self):
# force scroll to bottom of thumbs, if checkbox is set
scrollp = self.w.auto_scroll.get_state()
if scrollp:
self.fv.update_pending()
self.w.thumbs_scroll.scroll_to_end()
def clear_widget(self):
"""
Clears the thumbnail display widget of all thumbnails, but does
not remove them from the thumbDict or thumbList.
"""
with self.thmblock:
self.w.thumbs.remove_all()
def reorder_thumbs(self):
self.logger.debug("Reordering thumb grid")
with self.thmblock:
self.clear_widget()
# Add thumbs back in by rows
self.thumbColCount = 0
self.thumbRowCount = 0
for thumbkey in self.thumbList:
bnch = self.thumbDict[thumbkey]
self.w.thumbs.add_widget(bnch.widget,
self.thumbRowCount, self.thumbColCount)
self.thumbColCount = ((self.thumbColCount + 1) %
self.thumbNumCols)
if self.thumbColCount == 0:
self.thumbRowCount += 1
self._auto_scroll()
self.logger.debug("Reordering done")
def query_thumb(self, thumbkey, name, metadata):
result = []
for kwd in self.keywords:
try:
text = kwd + ': ' + str(metadata[kwd])
except Exception as e:
self.logger.warning("Couldn't determine %s name: %s" % (
kwd, str(e)))
text = "%s: N/A" % (kwd)
result.append(text)
return '\n'.join(result)
def _mk_context_menu(self, thumbkey, chname, name, path, image_future):
menu = Widgets.Menu()
item = menu.add_name("Display")
item.add_callback('activated',
lambda w: self.load_file(
thumbkey, chname, name, path, image_future))
menu.add_separator()
item = menu.add_name("Remove")
item.add_callback('activated',
lambda w: self.fv.remove_image_by_name(
chname, name, impath=path))
return menu
def update_thumbnail(self, thumbkey, imgwin, name, metadata):
with self.thmblock:
try:
bnch = self.thumbDict[thumbkey]
except KeyError:
self.logger.debug("No thumb found for %s; not updating "
"thumbs" % (str(thumbkey)))
return
self.logger.info("updating thumbnail '%s'" % (name))
bnch.image._set_image(imgwin)
self.logger.debug("update finished.")
def add_image_info_cb(self, viewer, channel, info):
save_thumb = self.settings.get('cache_thumbs', False)
# Do we already have this thumb loaded?
chname = channel.name
thumbkey = self.get_thumb_key(chname, info.name, info.path)
thumbpath = self.get_thumbpath(info.path)
with self.thmblock:
try:
bnch = self.thumbDict[thumbkey]
# if these are not equal then the mtime must have
# changed on the file, better reload and regenerate
if bnch.thumbpath == thumbpath:
return
except KeyError:
pass
# Is there a cached thumbnail image on disk we can use?
image = None
if (thumbpath is not None) and os.path.exists(thumbpath):
save_thumb = False
try:
# try to load the thumbnail image
image = self.fv.load_image(thumbpath)
except Exception as e:
pass
try:
if image is None:
if info.path is None:
# No way to generate a thumbnail for this image
return
# no luck loading thumbnail, try to load the full image
image = info.image_loader(info.path)
# make sure name is consistent
image.set(name=info.name)
self.fv.gui_do(self._make_thumb, chname, image, info.name,
info.path, thumbkey, info.image_future,
save_thumb=save_thumb,
thumbpath=thumbpath)
except Exception as e:
self.logger.error("Error generating thumbnail for '%s': %s" % (
info.path, str(e)))
# TODO: generate "broken thumb"?
def __str__(self):
return 'thumbs'
#END
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