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pp_imageplayer.py
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pp_imageplayer.py
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# dec 2015 - !!!!!! bug in pause half corrected
# feb 2016 fix bug in pause properly
import os
from Tkinter import CENTER,NW
from PIL import Image
from PIL import ImageTk
from pp_utils import StopWatch, parse_rectangle,calculate_text_position
from pp_player import Player
class ImagePlayer(Player):
""" Displays an image on a canvas for a period of time. Image display can be paused and interrupted
__init_ just makes sure that all the things the player needs are available
load and unload loads and unloads the track
show shows the track,close closes the track after pause at end
input-pressed receives user input while the track is playing.
"""
def __init__(self,
show_id,
showlist,
root,
canvas,
show_params,
track_params ,
pp_dir,
pp_home,
pp_profile,
end_callback,
command_callback):
# initialise items common to all players
Player.__init__( self,
show_id,
showlist,
root,
canvas,
show_params,
track_params ,
pp_dir,
pp_home,
pp_profile,
end_callback,
command_callback)
# stopwatch for timing functions
StopWatch.global_enable=False
self.sw=StopWatch()
self.sw.off()
self.mon.trace(self,'')
# and initialise things for this player
# print 'imageplayer init'
# get duration from profile
if self.track_params['duration'] != '':
self.duration= int(self.track_params['duration'])
else:
self.duration= int(self.show_params['duration'])
# get image window from profile
if self.track_params['image-window'].strip() != '':
self.image_window= self.track_params['image-window'].strip()
else:
self.image_window= self.show_params['image-window'].strip()
# get image rotation from profile
if self.track_params['image-rotate'].strip() != '':
self.image_rotate = int(self.track_params['image-rotate'].strip())
else:
self.image_rotate= int(self.show_params['image-rotate'].strip())
if self.track_params['pause-timeout'] != '':
pause_timeout_text= self.track_params['pause-timeout']
else:
pause_timeout_text= self.show_params['pause-timeout']
if pause_timeout_text.isdigit():
self.pause_timeout= int(pause_timeout_text)
else:
self.pause_timeout=0
self.track_image_obj=None
self.tk_img=None
self.paused=False
self.pause_text_obj=None
self.pause_timer= None
# initialise the state machine
self.play_state='initialised'
# LOAD - loads the images and text
def load(self,track,loaded_callback,enable_menu):
# instantiate arguments
self.track=track
# print 'imageplayer load',self.track
self.loaded_callback=loaded_callback # callback when loaded
self.mon.trace(self,'')
Player.pre_load(self)
# parse the image_window
status,message,self.command,self.has_coords,self.window_x1,self.window_y1,self.window_x2,self.window_y2,self.image_filter=self.parse_window(self.image_window)
if status == 'error':
self.mon.err(self,'image window error, '+message+ ': '+self.image_window)
self.play_state='load-failed'
self.loaded_callback('error','image window error, '+message+ ': '+self.image_window)
return
# load the plugin, this may modify self.track and enable the plugin drawing to canvas
if self.track_params['plugin'] != '':
status,message=self.load_plugin()
if status == 'error':
self.mon.err(self,message)
self.play_state='load-failed'
self.loaded_callback('error',message)
return
# load the images and text
status,message=Player.load_x_content(self,enable_menu)
if status == 'error':
self.mon.err(self,message)
self.play_state='load-failed'
self.loaded_callback('error',message)
return
else:
self.play_state='loaded'
if self.loaded_callback is not None:
self.loaded_callback('loaded','image track loaded')
# UNLOAD - abort a load when sub-process is loading or loaded
def unload(self):
self.mon.trace(self,'')
# nothing to do for imageplayer
self.mon.log(self,">unload received from show Id: "+ str(self.show_id))
self.play_state='unloaded'
# SHOW - show a track from its loaded state
def show(self,ready_callback,finished_callback,closed_callback):
# instantiate arguments
self.ready_callback=ready_callback # callback when ready to show an image -
self.finished_callback=finished_callback # callback when finished showing
self.closed_callback=closed_callback # callback when closed - not used by imageplayer
self.mon.trace(self,'')
# init state and signals
self.tick = 100 # tick time for image display (milliseconds)
self.dwell = 10*self.duration
self.dwell_counter=0
self.quit_signal=False
self.paused=False
self.pause_text_obj=None
# do common bits
Player.pre_show(self)
# start show state machine
self.start_dwell()
# CLOSE - nothing to do in imageplayer - x content is removed by ready callback and hide
def close(self,closed_callback):
self.mon.trace(self,'')
self.closed_callback=closed_callback
self.mon.log(self,">close received from show Id: "+ str(self.show_id))
if self.tick_timer!= None:
self.canvas.after_cancel(self.tick_timer)
self.play_state='closed'
if self.closed_callback is not None:
self.closed_callback('normal','imageplayer closed')
def input_pressed(self,symbol):
self.mon.trace(self,symbol)
if symbol == 'pause':
self.pause()
if symbol == 'pause-on':
self.pause_on()
if symbol == 'pause-off':
self.pause_off()
elif symbol == 'stop':
self.stop()
def pause(self):
if self.paused is False:
self.paused = True
if self.pause_timeout>0:
# kick off the pause teimeout timer
print "!!toggle pause on"
self.pause_timer=self.canvas.after(self.pause_timeout*1000,self.pause_timeout_callback)
else:
self.paused=False
# cancel the pause timer
if self.pause_timer != None:
print "!!toggle pause off"
self.canvas.after_cancel(self.pause_timer)
self.pause_timer=None
def pause_timeout_callback(self):
print "!!callback pause off"
self.pause_off()
self.pause_timer=None
def pause_on(self):
self.paused = True
print "!!pause on"
self.pause_timer=self.canvas.after(self.pause_timeout*1000,self.pause_timeout_callback)
def pause_off(self):
self.paused = False
print "!!pause off"
# cancel the pause timer
if self.pause_timer != None:
self.canvas.after_cancel(self.pause_timer)
self.pause_timer=None
def stop(self):
# cancel the pause timer
if self.pause_timer != None:
self.canvas.after_cancel(self.pause_timer)
self.pause_timer=None
self.quit_signal=True
# ******************************************
# Sequencing
# ********************************************
def start_dwell(self):
self.play_state='showing'
self.tick_timer=self.canvas.after(self.tick, self.do_dwell)
def do_dwell(self):
if self.quit_signal is True:
self.mon.log(self,"quit received")
if self.finished_callback is not None:
self.finished_callback('pause_at_end','user quit or duration exceeded')
# use finish so that the show will call close
else:
if self.paused is False:
self.dwell_counter=self.dwell_counter+1
# one time flipping of pause text
pause_text= self.track_params['pause-text']
if self.paused is True and self.pause_text_obj is None:
x,y,anchor,justify=calculate_text_position(self.track_params['pause-text-x'],self.track_params['pause-text-y'],
self.show_canvas_x1,self.show_canvas_y1,
self.show_canvas_centre_x,self.show_canvas_centre_y,
self.show_canvas_x2,self.show_canvas_y2,self.track_params['pause-text-justify'])
self.pause_text_obj=self.canvas.create_text(x,y, anchor=anchor,justify=justify,
text=pause_text,
fill=self.track_params['pause-text-colour'],
font=self.track_params['pause-text-font'])
self.canvas.update_idletasks( )
if self.paused is False and self.pause_text_obj is not None:
self.canvas.delete(self.pause_text_obj)
self.pause_text_obj=None
self.canvas.update_idletasks( )
if self.dwell != 0 and self.dwell_counter == self.dwell:
if self.finished_callback is not None:
self.finished_callback('pause_at_end','user quit or duration exceeded')
# use finish so that the show will call close
else:
self.tick_timer=self.canvas.after(self.tick, self.do_dwell)
# *****************
# x content
# *****************
# called from Player, load_x_content
def load_track_content(self):
ppil_image=None # Keep landscape happy
# get the track to be displayed
if os.path.exists(self.track) is True:
try:
ppil_image=Image.open(self.track)
except:
ppil_image=None
self.tk_img=None
self.track_image_obj=None
return 'error','Not a recognised image format '+ self.track
else:
ppil_image=None
self.tk_img=None
self.track_image_obj=None
return 'error','Track file not found '+ self.track
# display track image
if ppil_image is not None:
#rotate the image
# print self.image_width,self.image_height
if self.image_rotate!=0:
ppil_image=ppil_image.rotate(self.image_rotate,expand=True)
self.image_width,self.image_height=ppil_image.size
# print self.image_width,self.image_height
if self.command == 'original':
# display image at its original size
if self.has_coords is False:
# load and display the unmodified image in centre
self.tk_img=ImageTk.PhotoImage(ppil_image)
del ppil_image
self.track_image_obj = self.canvas.create_image(self.show_canvas_centre_x+self.show_canvas_x1,
self.show_canvas_centre_y+self.show_canvas_y1,
image=self.tk_img, anchor=CENTER)
else:
# load and display the unmodified image at x1,y1
self.tk_img=ImageTk.PhotoImage(ppil_image)
del ppil_image
self.track_image_obj = self.canvas.create_image(self.window_x1+self.show_canvas_x1,
self.window_y1+self.show_canvas_y1,
image=self.tk_img, anchor=NW)
elif self.command in ('fit','shrink'):
# shrink fit the window or screen preserving aspect
if self.has_coords is True:
window_width=self.window_x2 - self.window_x1
window_height=self.window_y2 - self.window_y1
window_centre_x=(self.window_x2+self.window_x1)/2
window_centre_y= (self.window_y2+self.window_y1)/2
else:
window_width=self.show_canvas_width
window_height=self.show_canvas_height
window_centre_x=self.show_canvas_centre_x
window_centre_y=self.show_canvas_centre_y
if (self.image_width > window_width or self.image_height > window_height and self.command == 'fit') or (self.command == 'shrink') :
# print 'show canvas',self.show_canvas_x1,self.show_canvas_y1,self.show_canvas_x2,self.show_canvas_y2
# print 'canvas width/height/centre',self.show_canvas_width,self.show_canvas_height,self.show_canvas_centre_x,self.show_canvas_centre_y
# print 'window dimensions/centre',window_width,window_height,window_centre_x,window_centre_y
# print
# original image is larger or , shrink it to fit the screen preserving aspect
# print ppil_image.size
ppil_image.thumbnail((int(window_width),int(window_height)),eval(self.image_filter))
# print ppil_image.size
self.tk_img=ImageTk.PhotoImage(ppil_image)
del ppil_image
self.track_image_obj = self.canvas.create_image(window_centre_x + self.show_canvas_x1,
window_centre_y + self.show_canvas_y1,
image=self.tk_img, anchor=CENTER)
else:
# fitting and original image is smaller, expand it to fit the screen preserving aspect
prop_x = float(window_width) / self.image_width
prop_y = float(window_height) / self.image_height
if prop_x > prop_y:
prop=prop_y
else:
prop=prop_x
increased_width=int(self.image_width * prop)
increased_height=int(self.image_height * prop)
# print 'result',prop, increased_width,increased_height
ppil_image=ppil_image.resize((int(increased_width), int(increased_height)),eval(self.image_filter))
self.tk_img=ImageTk.PhotoImage(ppil_image)
del ppil_image
self.track_image_obj = self.canvas.create_image(window_centre_x + self.show_canvas_x1,
window_centre_y + self.show_canvas_y1,
image=self.tk_img, anchor=CENTER)
elif self.command in ('warp'):
# resize to window or screen without preserving aspect
if self.has_coords is True:
window_width=self.window_x2 - self.window_x1
window_height=self.window_y2 - self.window_y1
window_centre_x=(self.window_x2+self.window_x1)/2
window_centre_y= (self.window_y2+self.window_y1)/2
else:
window_width=self.show_canvas_width
window_height=self.show_canvas_height
window_centre_x=self.show_canvas_centre_x
window_centre_y=self.show_canvas_centre_y
# print 'window',window_width,window_height,window_centre_x,window_centre_y,self.show_canvas_x1,self.show_canvas_y1,'\n'
ppil_image=ppil_image.resize((int(window_width), int(window_height)),eval(self.image_filter))
self.tk_img=ImageTk.PhotoImage(ppil_image)
del ppil_image
self.track_image_obj = self.canvas.create_image(window_centre_x+ self.show_canvas_x1,
window_centre_y+ self.show_canvas_y1,
image=self.tk_img, anchor=CENTER)
self.canvas.itemconfig(self.track_image_obj,state='hidden')
return 'normal','track content loaded';
def show_track_content(self):
self.canvas.itemconfig(self.track_image_obj,state='normal')
def hide_track_content(self):
if self.pause_text_obj is not None:
self.canvas.delete(self.pause_text_obj)
self.pause_text_obj=None
# self.canvas.update_idletasks( )
self.canvas.itemconfig(self.track_image_obj,state='hidden')
self.canvas.delete(self.track_image_obj)
self.tk_img=None
def parse_window(self,line):
fields = line.split()
# check there is a command field
if len(fields) < 1:
return 'error','No command field','',False,0,0,0,0,''
# deal with original whch has 0 or 2 arguments
image_filter=''
if fields[0] == 'original':
if len(fields) not in (1,3):
return 'error','Original has wrong number of arguments','',False,0,0,0,0,''
# deal with window coordinates
if len(fields) == 3:
# window is specified
if not (fields[1].isdigit() and fields[2].isdigit()):
return 'error','coordinates are not numbers','',False,0,0,0,0,''
has_window=True
return 'normal','',fields[0],has_window,float(fields[1]),float(fields[2]),0,0,image_filter
else:
# no window
has_window=False
return 'normal','',fields[0],has_window,0,0,0,0,image_filter
# deal with remainder which has 1, 2, 5 or 6arguments
# check basic syntax
if fields[0] not in ('shrink','fit','warp'):
return 'error','illegal command'+fields[0],'',False,0,0,0,0,''
if len(fields) not in (1,2,3,5,6):
return 'error','wrong number of fields' + str(len(fields)),'',False,0,0,0,0,''
if len(fields) == 6 and fields[5] not in ('NEAREST','BILINEAR','BICUBIC','ANTIALIAS'):
return 'error','wrong filter or params'+ fields[5],'',False,0,0,0,0,''
if len(fields) == 2 and (fields[1] not in ('NEAREST','BILINEAR','BICUBIC','ANTIALIAS') and '*' not in fields[1]):
return 'error','wrong filter or params'+ fields[1],'',False,0,0,0,0,''
if len(fields) == 3 and fields[2] not in ('NEAREST','BILINEAR','BICUBIC','ANTIALIAS'):
return 'error','wrong filter or params'+ fields[2],'',False,0,0,0,0,''
# deal with no window coordinates and no
if len(fields) == 1:
has_window=False
return 'normal','',fields[0],has_window,0,0,0,0,'Image.NEAREST'
# deal with window coordinates in +* format with optional filter
if len(fields) in (2,3) and '*' in fields[1]:
status,message,x1,y1,x2,y2 = parse_rectangle(fields[1])
if status=='error':
return 'error',message,'',False,0,0,0,0,''
else:
has_window=True
if len(fields) == 3:
image_filter='Image.'+fields[2]
else:
image_filter='Image.NEAREST'
return 'normal','',fields[0],has_window,x1,y1,x2,y2,image_filter
if len(fields) in (5,6):
# window is specified in x1 y1 x2 y2
if not (fields[1].isdigit() and fields[2].isdigit() and fields[3].isdigit() and fields[4].isdigit()):
return 'error','coords are not numbers','',False,0,0,0,0,''
has_window=True
if len(fields) == 6:
image_filter='Image.'+fields[5]
else:
image_filter='Image.NEAREST'
return 'normal','',fields[0],has_window,float(fields[1]),float(fields[2]),float(fields[3]),float(fields[4]),image_filter
else:
# no window
has_window=False
if len(fields) == 2:
image_filter='Image.'+fields[1]
else:
image_filter='Image.NEAREST'
return 'normal','',fields[0],has_window,0,0,0,0,image_filter