/usr/lib/python2.7/dist-packages/ginga/web/bokehw/ImageViewBokeh.py is in python-ginga 2.6.1-2.
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# ImageViewBokeh.py -- classes implementing a ginga viewer backend for Bokeh
#
# This is open-source software licensed under a BSD license.
# Please see the file LICENSE.txt for details.
import sys, re
import numpy
import threading
import math
from io import BytesIO
# Bokeh imports
from bokeh.plotting import figure, show, curdoc
from bokeh.models import BoxSelectTool, TapTool, PanTool
#from bokeh.client import push_session
#from bokeh.io import push_notebook
from ginga import ImageView
from ginga import Mixins, Bindings, colors
from ginga.web.bokehw.CanvasRenderBokeh import CanvasRenderer
from ginga.util.heaptimer import TimerHeap
# TODO: is this the right place for this call?
#session = push_session(curdoc())
try:
# See if we have aggdraw module--best choice
from ginga.aggw.ImageViewAgg import ImageViewAgg as ImageViewSS, \
ImageViewAggError as ImageViewError
except ImportError:
try:
# No, hmm..ok, see if we have opencv module...
from ginga.cvw.ImageViewCv import ImageViewCv as ImageViewSS, \
ImageViewCvError as ImageViewError
except ImportError:
try:
# No dice. How about the PIL module?
from ginga.pilw.ImageViewPil import ImageViewPil as ImageViewSS, \
ImageViewPilError as ImageViewError
except ImportError:
# Fall back to mock--there will be no graphic overlays
from ginga.mockw.ImageViewMock import ImageViewMock as ImageViewSS, \
ImageViewMockError as ImageViewError
## class ImageViewBokehError(ImageView.ImageViewError):
## pass
class ImageViewBokehError(ImageViewError):
pass
class ImageViewBokeh2(ImageViewSS):
"""
This version does all the graphical overlays on the server side.
"""
def __init__(self, logger=None, rgbmap=None, settings=None):
ImageViewSS.__init__(self, logger=logger,
rgbmap=rgbmap,
settings=settings)
# Our Bokeh plot
self.figure = None
# Holds the image on the plot
self.bkimage = None
self._push_server = False
# NOTE: Bokeh manages it's Y coordinates by default with
# the origin at the bottom (see base class)
self._originUpper = False
# override, until we can get access to a timer
#self.defer_redraw = False
self.msgtask = None
# see reschedule_redraw() method
self._defer_task = None
def set_figure(self, figure):
"""Call this with the Bokeh figure object."""
self.figure = figure
self.bkimage = None
wd = figure.plot_width
ht = figure.plot_height
self.configure_window(wd, ht)
def get_figure(self):
return self.figure
def update_image(self):
if self.figure is None:
return
wd, ht = self.get_window_size()
# Get surface as a numpy array
surface = self.get_surface()
if isinstance(surface, numpy.ndarray):
arr8 = surface
else:
arr8 = numpy.fromstring(surface.tostring(), dtype=numpy.uint8)
arr8 = arr8.reshape((ht, wd, 4))
# Bokeh expects a 32-bit uint array type
view = arr8.view(dtype=numpy.uint32).reshape((ht, wd))
dst_x = dst_y = 0
# Create an Image_RGBA object in the plot
if self.bkimage is None:
self.bkimage = self.figure.image_rgba(image=[view],
x=[dst_x], y=[dst_y],
dw=[wd], dh=[ht])
d_src = self.bkimage.data_source
self._setup_handlers(d_src)
else:
# note: get the data source (a ColumnDataSource) and update
# the values
d_src = self.bkimage.data_source
d_src.data["image"] = [view]
d_src.data["x"] = [dst_x]
d_src.data["y"] = [dst_y]
d_src.data["dw"] = [wd]
d_src.data["dh"] = [ht]
if self._push_server:
try:
#self.bkimage.data_source.push_notebook()
#push_notebook()
cursession().store_objects(d_src)
except Exception as e:
self.logger.warning("Can't update bokeh plot: %s" % (str(e)))
def reschedule_redraw(self, time_sec):
if self.figure is not None:
## try:
## self.figure.after_cancel(self._defer_task)
## except:
## pass
time_ms = int(time_sec * 1000)
## self._defer_task = self.figure.after(time_ms,
## self.delayed_redraw)
def configure_window(self, width, height):
self.configure_surface(width, height)
def _setup_handlers(self, source):
pass
def set_cursor(self, cursor):
if self.figure is None:
return
def onscreen_message(self, text, delay=None):
if self.figure is None:
return
## if self.msgtask:
## try:
## self.figure.after_cancel(self.msgtask)
## except:
## pass
self.message = text
self.redraw(whence=3)
if delay:
ms = int(delay * 1000.0)
## self.msgtask = self.figure.after(ms,
## lambda: self.onscreen_message(None))
class ImageViewBokeh(ImageView.ImageViewBase):
"""
This version does all the graphical overlays on the client side.
"""
def __init__(self, logger=None, rgbmap=None, settings=None):
ImageView.ImageViewBase.__init__(self, logger=logger,
rgbmap=rgbmap,
settings=settings)
# Our Bokeh plot
self.figure = None
# Holds the image on the plot
self.bkimage = None
self._push_server = False
self.defer_redraw = False
# NOTE: Bokeh manages it's Y coordinates by default with
# the origin at the bottom (see base class)
self._originUpper = False
self.img_fg = (1.0, 1.0, 1.0)
self.img_bg = (0.5, 0.5, 0.5)
self.message = None
# Bokeh expects RGBA data for color images
self._rgb_order = 'RGBA'
self.renderer = CanvasRenderer(self)
# cursors
self.cursor = {}
# For timing events
self._msg_timer = None
self._defer_timer = None
self.t_.setDefaults(show_pan_position=False,
onscreen_ff='Sans Serif')
def set_figure(self, figure):
"""Call this with the Bokeh figure object."""
self.figure = figure
self.bkimage = None
wd = figure.plot_width
ht = figure.plot_height
#figure.responsive = True
# set background color
#figure.background_fill = self.img_bg
self.configure_window(wd, ht)
#self._defer_timer = curdoc().add_periodic_callback(self.timer_cb, 50)
def get_figure(self):
return self.figure
def get_rgb_order(self):
return self._rgb_order
def render_image(self, rgbobj, dst_x, dst_y):
"""Render the image represented by (rgbobj) at dst_x, dst_y
in the pixel space.
NOTE: this version uses a Figure.FigImage to render the image.
"""
self.logger.debug("redraw surface")
if self.figure is None:
return
# Grab the RGB array for the current image and place it in the
# Bokeh image
data = self.getwin_array(order=self._rgb_order)
ht, wd = data.shape[:2]
# Bokeh expects a 32-bit uint array type
view = data.view(dtype=numpy.uint32).reshape((ht, wd))
dst_x = dst_y = 0
# Create an Image_RGBA object in the plot
if self.bkimage is None:
self.bkimage = self.figure.image_rgba(image=[view],
x=[dst_x], y=[dst_y],
dw=[wd], dh=[ht])
d_src = self.bkimage.data_source
self._setup_handlers(d_src)
else:
# note: get the data source (a ColumnDataSource) and update
# the values
d_src = self.bkimage.data_source
d_src.data["image"] = [view]
d_src.data["x"] = [dst_x]
d_src.data["y"] = [dst_y]
d_src.data["dw"] = [wd]
d_src.data["dh"] = [ht]
# Draw a cross in the center of the window in debug mode
if self.t_['show_pan_position']:
# size of cross is 4% of max window dimensions
size = int(max(ht, wd) * 0.04)
ctr_x, ctr_y = self.get_center()
self.figure.cross(x=[ctr_x], y=[ctr_y],
size=size, color='red', line_width=1)
# render message if there is one currently
if self.message:
y = (ht // 3) * 2
x = (wd // 2)
self.figure.text(x=[x], y=[y], text=[self.message],
text_font_size='24', text_baseline='middle',
text_color='white',
text_align='center')
if self._push_server:
# force an update of the figure
try:
cursession().store_objects(d_src)
# TODO: if and when to use this?
#self.bkimage.data_source.push_notebook()
#push_notebook()
except Exception as e:
self.logger.warning("Can't update bokeh plot: %s" % (str(e)))
def configure_window(self, width, height):
self.configure(width, height)
def _setup_handlers(self, source):
pass
def _resize_cb(self, event):
wd, ht = event.width, event.height
self.logger.debug("canvas resized %dx%d" % (wd, ht))
self.configure_window(wd, ht)
def get_png_image_as_buffer(self, output=None):
ibuf = output
if ibuf is None:
ibuf = BytesIO()
qimg = self.figure.write_to_png(ibuf)
return ibuf
def update_image(self):
pass
def set_cursor(self, cursor):
pass
def define_cursor(self, ctype, cursor):
self.cursor[ctype] = cursor
def get_cursor(self, ctype):
return self.cursor[ctype]
def switch_cursor(self, ctype):
self.set_cursor(self.cursor[ctype])
def set_fg(self, r, g, b):
self.img_fg = (r, g, b)
self.redraw(whence=3)
def onscreen_message(self, text, delay=None):
## try:
## self._msg_timer.stop()
## except:
## pass
self.message = text
self.redraw(whence=3)
if delay:
time_ms = int(delay * 1000.0)
## self._msg_timer.interval = time_ms
## self._msg_timer.start()
def onscreen_message_off(self):
return self.onscreen_message(None)
def reschedule_redraw(self, time_sec):
if self._defer_timer is None:
self.delayed_redraw()
return
## try:
## self._defer_timer.stop()
## except:
## pass
time_ms = int(time_sec * 1000)
try:
self._defer_timer.interval = time_ms
self._defer_timer.start()
except Exception as e:
self.logger.warning("Exception starting timer: %s; "
"using unoptomized redraw" % (str(e)))
self.delayed_redraw()
def show_pan_mark(self, tf):
self.t_.set(show_pan_position=tf)
self.redraw(whence=3)
def timer_cb(self, *args):
self.logger.info("timer")
class ImageViewEvent(ImageViewBokeh):
def __init__(self, logger=None, rgbmap=None, settings=None):
ImageViewBokeh.__init__(self, logger=logger, rgbmap=rgbmap,
settings=settings)
# last known window mouse position
self.last_win_x = 0
self.last_win_y = 0
# last known data mouse position
self.last_data_x = 0
self.last_data_y = 0
# Does widget accept focus when mouse enters window
self.enter_focus = self.t_.get('enter_focus', True)
# @$%&^(_)*&^ gnome!!
self._keytbl = {
'shift': 'shift_l',
'control': 'control_l',
'alt': 'alt_l',
'win': 'super_l',
'`': 'backquote',
'"': 'doublequote',
"'": 'singlequote',
'\\': 'backslash',
' ': 'space',
# NOTE: not working
'escape': 'escape',
'enter': 'return',
# NOTE: not working
'tab': 'tab',
# NOTE: all Fn keys not working
'f1': 'f1',
'f2': 'f2',
'f3': 'f3',
'f4': 'f4',
'f5': 'f5',
'f6': 'f6',
'f7': 'f7',
'f8': 'f8',
'f9': 'f9',
'f10': 'f10',
'f11': 'f11',
'f12': 'f12',
}
# Define cursors for pick and pan
#hand = openHandCursor()
hand = 0
self.define_cursor('pan', hand)
#cross = thinCrossCursor('aquamarine')
cross = 1
self.define_cursor('pick', cross)
for name in ('motion', 'button-press', 'button-release',
'key-press', 'key-release', 'drag-drop',
'scroll', 'map', 'focus', 'enter', 'leave',
):
self.enable_callback(name)
def set_figure(self, figure):
super(ImageViewEvent, self).set_figure(figure)
def _setup_handlers(self, source):
#source.on_change('selected', self, 'select_event_cb')
source.on_change('selected', self.select_event_cb)
## self._box_select_tool = self.figure.select(dict(type=BoxSelectTool))
## self._box_select_tool.select_every_mousemove = True
self._pan_tool = self.figure.select(dict(type=PanTool))
#self._pan_tool.select_every_mousemove = True
## connect = figure.canvas.mpl_connect
## #connect("map_event", self.map_event)
## #connect("focus_in_event", self.focus_event, True)
## #connect("focus_out_event", self.focus_event, False)
## connect("figure_enter_event", self.enter_notify_event)
## connect("figure_leave_event", self.leave_notify_event)
## #connect("axes_enter_event", self.enter_notify_event)
## #connect("axes_leave_event", self.leave_notify_event)
## connect("motion_notify_event", self.motion_notify_event)
## connect("button_press_event", self.button_press_event)
## connect("button_release_event", self.button_release_event)
## connect("key_press_event", self.key_press_event)
## connect("key_release_event", self.key_release_event)
## connect("scroll_event", self.scroll_event)
# TODO: drag-drop event
pass
def transkey(self, keyname):
self.logger.debug("matplotlib keyname='%s'" % (keyname))
if keyname is None:
return keyname
try:
return self._keytbl[keyname.lower()]
except KeyError:
return keyname
def get_keyTable(self):
return self._keytbl
def set_enter_focus(self, tf):
self.enter_focus = tf
def focus_event(self, event, hasFocus):
return self.make_callback('focus', hasFocus)
def enter_notify_event(self, event):
if self.enter_focus:
self.focus_event(event, True)
return self.make_callback('enter')
def leave_notify_event(self, event):
self.logger.debug("leaving widget...")
if self.enter_focus:
self.focus_event(event, False)
return self.make_callback('leave')
def key_press_event(self, event):
keyname = event.key
keyname = self.transkey(keyname)
if keyname is not None:
self.logger.debug("key press event, key=%s" % (keyname))
return self.make_ui_callback('key-press', keyname)
def key_release_event(self, event):
keyname = event.key
keyname = self.transkey(keyname)
if keyname is not None:
self.logger.debug("key release event, key=%s" % (keyname))
return self.make_ui_callback('key-release', keyname)
def button_press_event(self, event):
x, y = event.x, event.y
button = 0
if event.button in (1, 2, 3):
button |= 0x1 << (event.button - 1)
self.logger.debug("button event at %dx%d, button=%x" % (x, y, button))
data_x, data_y = self.get_data_xy(x, y)
return self.make_ui_callback('button-press', button, data_x, data_y)
def button_release_event(self, event):
x, y = event.x, event.y
button = 0
if event.button in (1, 2, 3):
button |= 0x1 << (event.button - 1)
self.logger.debug("button release at %dx%d button=%x" % (x, y, button))
data_x, data_y = self.get_data_xy(x, y)
return self.make_ui_callback('button-release', button, data_x, data_y)
def select_event_cb(self, attrname, old_val, new_val):
print("select cb: %s <-- %s" % (attrname, str(new_val)))
self.logger.info("select cb: %s <-- %s" % (attrname, str(new_val)))
def get_last_win_xy(self):
return (self.last_win_x, self.last_win_y)
def get_last_data_xy(self):
return (self.last_data_x, self.last_data_y)
def motion_notify_event(self, event):
button = 0
x, y = event.x, event.y
self.last_win_x, self.last_win_y = x, y
if event.button in (1, 2, 3):
button |= 0x1 << (event.button - 1)
self.logger.debug("motion event at %dx%d, button=%x" % (x, y, button))
data_x, data_y = self.get_data_xy(x, y)
self.last_data_x, self.last_data_y = data_x, data_y
self.logger.debug("motion event at DATA %dx%d" % (data_x, data_y))
return self.make_ui_callback('motion', button, data_x, data_y)
def scroll_event(self, event):
x, y = event.x, event.y
# Matplotlib only gives us the number of steps of the scroll,
# positive for up and negative for down. No horizontal scrolling.
direction = None
if event.step > 0:
direction = 0.0
elif event.step < 0:
direction = 180.0
amount = abs(event.step) * 15.0
self.logger.debug("scroll deg=%f direction=%f" % (
amount, direction))
data_x, data_y = self.get_data_xy(x, y)
self.last_data_x, self.last_data_y = data_x, data_y
return self.make_ui_callback('scroll', direction, amount,
data_x, data_y)
class ImageViewZoom(Mixins.UIMixin, ImageViewEvent):
# class variables for binding map and bindings can be set
bindmapClass = Bindings.BindingMapper
bindingsClass = Bindings.ImageViewBindings
@classmethod
def set_bindingsClass(cls, klass):
cls.bindingsClass = klass
@classmethod
def set_bindmapClass(cls, klass):
cls.bindmapClass = klass
def __init__(self, logger=None, rgbmap=None, settings=None,
bindmap=None, bindings=None):
ImageViewEvent.__init__(self, logger=logger, rgbmap=rgbmap,
settings=settings)
Mixins.UIMixin.__init__(self)
self.ui_setActive(True)
if bindmap is None:
bindmap = ImageViewZoom.bindmapClass(self.logger)
self.bindmap = bindmap
bindmap.register_for_events(self)
if bindings is None:
bindings = ImageViewZoom.bindingsClass(self.logger)
self.set_bindings(bindings)
def get_bindmap(self):
return self.bindmap
def get_bindings(self):
return self.bindings
def set_bindings(self, bindings):
self.bindings = bindings
bindings.set_bindings(self)
class CanvasView(ImageViewZoom):
def __init__(self, logger=None, settings=None, rgbmap=None,
bindmap=None, bindings=None):
ImageViewZoom.__init__(self, logger=logger, settings=settings,
rgbmap=rgbmap,
bindmap=bindmap, bindings=bindings)
# Needed for UIMixin to propagate events correctly
self.objects = [self.private_canvas]
def set_canvas(self, canvas, private_canvas=None):
super(CanvasView, self).set_canvas(canvas,
private_canvas=private_canvas)
self.objects[0] = self.private_canvas
#END
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