/gtk/prep-images

To get this branch, use:
bzr branch http://bzr.ed.am/gtk/prep-images
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
# main_window.py
#
# Copyright (C) 2011 Tim Marston <edam@waxworlds.org>
#
# This file is part of prep-images (hereafter referred to as "this program").
# See http://www.waxworlds.org/edam/software/gtk/prep-images for more
# information.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import sys
import os
import gobject
import pygtk
pygtk.require( '2.0' );
import gtk
from subprocess import call
from .preferences import *
from .prefs_dialog import *


class MainWindow:

	DRAWING_AREA_INIT_WIDTH = 550
	DRAWING_AREA_INIT_HEIGHT = 500
	IMAGEMAGICK_CONVERT_BIN = '/usr/bin/convert'

	def __init__( self, filename ):
		self.filename = filename

		# load preferences
		self.prefs = Preferences()

		# load main image and reset copyright image state to unloaded
		self.load_main_image()
		self.copyright_pic = None

		# init pos
		self.pos = "bottom-left";

		# work out the initial size of the drawing area so that the greatest of
		# the two dimensions is 450px
		scale = min( \
			float( self.DRAWING_AREA_INIT_WIDTH ) / self.pic.get_width(), \
			float( self.DRAWING_AREA_INIT_HEIGHT ) / self.pic.get_height() )
		init_width = int( round( scale * self.pic.get_width() ) )
		init_height = int( round( scale * self.pic.get_height() ) )

		# create window
		self.window = gtk.Window( gtk.WINDOW_TOPLEVEL )
		self.window.connect( "delete_event", self.delete_event )
		self.window.connect( "destroy", self.destroy )
		self.window.connect( "key-press-event", self.key_press_event )
		self.window.set_title( "Add Copyright to Images" );
		self.window.set_border_width( 10 )
		self.window.set_position( gtk.WIN_POS_CENTER )
		vbox = gtk.VBox( False, 10 )
		self.window.add( vbox )

		# create drawing area
		self.drawing_area = gtk.DrawingArea()
		self.drawing_area.set_size_request( init_width, init_height )
		self.drawing_area.add_events( gtk.gdk.POINTER_MOTION_MASK | \
			gtk.gdk.POINTER_MOTION_HINT_MASK | \
			gtk.gdk.BUTTON_PRESS_MASK )
		self.drawing_area.connect( "configure_event", \
			self.drawing_area_configure_event )
		self.drawing_area.connect( "expose_event", \
			self.drawing_area_expose_event )
		self.drawing_area.connect( "motion_notify_event", \
			self.motion_notify_event )
		self.drawing_area.connect( "button_press_event", \
			self.drawing_area_button_press_event )
		vbox.pack_start( self.drawing_area, True, True, 0 )

		# create buttons
		hbox = gtk.HBox( False, 10 )
		vbox.pack_end( hbox, False, False, 0 )
		left_button_box = gtk.HButtonBox()
		left_button_box.set_layout( gtk.BUTTONBOX_START )
		hbox.pack_start( left_button_box, True, True, 0 )
		button_box = gtk.HButtonBox()
		button_box.set_layout( gtk.BUTTONBOX_END )
		button_box.set_spacing( 10 )
		hbox.pack_end( button_box, True, True, 0 )
		prefs_button = gtk.Button( stock = gtk.STOCK_PREFERENCES )
		prefs_button.connect( "clicked", self.prefs_button_pressed )
		left_button_box.pack_start( prefs_button, True, True, 0 )
		cancel_button = gtk.Button( stock = gtk.STOCK_CANCEL )
		cancel_button.connect_object( "clicked", gtk.Widget.destroy, \
			self.window )
		button_box.pack_end( cancel_button, True, True, 0 )
		self.ok_button = gtk.Button( stock = gtk.STOCK_APPLY )
		self.ok_button.connect( "clicked", self.ok_button_pressed )
		button_box.pack_end( self.ok_button, True, True, 0 )
		self.ok_button.set_flags( gtk.CAN_DEFAULT )
		self.ok_button.grab_default()
		self.ok_button.grab_focus()

		# show it all
		self.window.show_all()

		# load copyright image
		self.load_copyright_image()

	def load_main_image( self ):

		# load image file
		try:
			self.pic = gtk.gdk.pixbuf_new_from_file( self.filename )
		except gobject.GError as e:
			dialog = gtk.MessageDialog( None, gtk.DIALOG_MODAL, \
				gtk.MESSAGE_ERROR, gtk.BUTTONS_CLOSE, e.message )
			dialog.run()
			dialog.destroy()
			exit( 1 )

		# scale it
		if self.prefs.resize:
			scale = min( \
				float( self.prefs.resize_width ) / self.pic.get_width(), \
				float( self.prefs.resize_height ) / self.pic.get_height() )
			self.pic = self.pic.scale_simple( \
				int( round( scale * self.pic.get_width() ) ), \
				int( round( scale * self.pic.get_height() ) ), \
				gtk.gdk.INTERP_BILINEAR )

	def load_copyright_image( self ):

		# reset state
		self.copyright_pic = None
		self.ok_button.set_sensitive( False )

		# check if we've got a copyright filename set
		if self.prefs.copyright_filename == '':
			dialog = gtk.MessageDialog( self.window, gtk.DIALOG_MODAL, \
				gtk.MESSAGE_INFO, gtk.BUTTONS_OK, \
				"No copyright image has been set. " + \
				"Please set one in the Preferences." )
			dialog.format_secondary_text( "While this issue persists, you " + \
				"can not proceed with this operation" )
			dialog.run()
			dialog.destroy()
			return

		# load copyright overlay image file
		try:
			self.copyright_pic = gtk.gdk.pixbuf_new_from_file( \
				os.path.expanduser( self.prefs.copyright_filename ) )
		except gobject.GError as e:
			dialog = gtk.MessageDialog( None, gtk.DIALOG_MODAL, \
				gtk.MESSAGE_ERROR, gtk.BUTTONS_OK, \
				"Unable to load copyright overlay image: " + \
				e.message )
			dialog.format_secondary_text( "While this issue persists, you " + \
				"can not proceed with this operation" )
			dialog.run()
			dialog.destroy()
			return

		# check the copyright overlay pic is smaller than the main pic
		if self.copyright_pic.get_width() > self.pic.get_width() or \
				self.copyright_pic.get_height() > self.pic.get_height():
			dialog = gtk.MessageDialog( None, gtk.DIALOG_MODAL, \
				gtk.MESSAGE_ERROR, gtk.BUTTONS_OK, \
				"The copyright overlay image is larger than the photo!" )
			dialog.format_secondary_text( "While this issue persists, you " + \
					"can not proceed with this operation" )
			dialog.run()
			dialog.destroy()
			self.copyright_pic = None
			return

		# enable the "ok" button and reconfigure the drawing area to generate
		# scaled puixbufs
		self.ok_button.set_sensitive( True )
		self.drawing_area.queue_resize()

	def main( self ):
		gtk.main()

	def ok_button_pressed( self, widget ):

		# calculate output filename
		pos = self.filename.rindex( '.' )
		if self.prefs.export_inplace:
			append = ".tmp"
		else:
			append = self.prefs.export_append
		out_filename = self.filename[ : self.filename.rindex( '.' ) ] + \
			append + self.filename[ self.filename.rindex( '.' ) : ]

		# calculate geometry
		top = 0 if self.pos.find( 'top' ) != -1 else \
			self.pic.get_height() - self.copyright_pic.get_height()
		left = 0 if self.pos.find( 'left' ) != -1 else \
			self.pic.get_width() - self.copyright_pic.get_width()

		infile = self.filename

		# calculate program args
		resize_geometry = str( self.prefs.resize_width ) + "x" + \
			str( self.prefs.resize_height )
		copyright_geometry = str( self.copyright_pic.get_width() ) + \
			"x" + str( self.copyright_pic.get_height() ) + "+" + \
			str( left ) + "+" + str( top )
		args = [ self.IMAGEMAGICK_CONVERT_BIN, \
			os.path.expanduser( self.prefs.copyright_filename ), \
			"-geometry", copyright_geometry, \
			"-compose", "screen", "-composite", \
			out_filename ]
		if( self.prefs.resize ):
			args[ 1 : 1 ] = [ "(", "-resize", resize_geometry, \
				self.filename, ")" ]
		else:
			args[ 1 : 1 ] = [ self.filename ]

		# call ImageMagick to do our dirtywork
		try:
			ret = call( args )
			if ret != 0:
				print >>sys.stderr, "ImageMagick failed, returned ", ret
				return
		except OSError as e:
			print >>sys.stderr, "Failed to execute ImageMagick: ", e
			return

		if self.prefs.export_inplace:
			# move original file out of the way
			try:
				os.rename( self.filename, self.filename + ".old" )
			except OSError as e:
				print >>sys.stderr, "Could not rename original image file: ", \
					e.strerror
				exit( 1 )

			# move new file in-place
			try:
				os.rename( out_filename, self.filename )
			except OSError as e:
				# try and put the original file back again
				try:
					os.rename( self.filename + ".old", self.filename )
				except OSError:
					pass
				print >>sys.stderr, e.strerror
				exit( 1 )

			# delete original
			try:
				os.unlink( self.filename + ".old" )
			except OSError as e:
				print >>sys.stderr, "Unable to remove original image file (it ", \
					"now has '.old' appended to it's name): ", e.strerror
				exit( 1 )

		# close this window
		self.window.destroy()

	def prefs_button_pressed( self, widget ):
		PreferencesDialog( self.window ).main()
		self.prefs = Preferences()
		self.load_main_image()
		self.load_copyright_image()
		self.drawing_area.queue_resize()
		self.drawing_area.queue_draw()

	def key_press_event( self, widget, event ):
		if event.keyval == gtk.keysyms.Escape:
			self.window.destroy()
		elif event.keyval == gtk.keysyms.Up:
			self.move_pos( "bottom", "top" )
		elif event.keyval == gtk.keysyms.Down:
			self.move_pos( "top", "bottom" )
		elif event.keyval == gtk.keysyms.Left:
			self.move_pos( "right", "left" )
		elif event.keyval == gtk.keysyms.Right:
			self.move_pos( "left", "right" )
		else:
			return False

		return True

	def delete_event( self, widget, event, data = None ):
		return False

	def destroy( self, widget, data = None ):
		gtk.main_quit()

	def motion_notify_event( self, widget, event ):
		x, y, width, height = widget.get_allocation()

		# get mouse position
		if event.is_hint:
			x, y, state = event.window.get_pointer()
		else:
			x = event.x
			y = event.y
			state = event.state

		# calculate copyright overlay pos
		pos = ( "top" if y <= height / 2 else "bottom" ) + "-" + \
			( "left" if x <= width / 2 else "right" )

		# redraw if necessary
		if getattr( self, "pos", None ) != pos:
			self.pos = pos
			self.generate_pixmap()
			widget.queue_draw()

		return True

	def drawing_area_button_press_event( self, widget, event ):
		if self.ok_button.get_property( "sensitive" ):
			self.ok_button.clicked()

	def drawing_area_configure_event( self, widget, event ):
		x, y, width, height = widget.get_allocation()

		# work out minimum scale required to fit pic_orig in to the widget area
		scale = min( float( width ) / self.pic.get_width(),
			float( height ) / self.pic.get_height() )

		# scale the images
		self.pic_scale = self.pic.scale_simple( \
			int( round( scale * self.pic.get_width() ) ), \
			int( round( scale * self.pic.get_height() ) ), \
			gtk.gdk.INTERP_BILINEAR )
		if self.copyright_pic != None:
			self.copyright_pic_scale = self.copyright_pic.scale_simple( \
				int( round( scale * self.copyright_pic.get_width() ) ), \
				int( round( scale * self.copyright_pic.get_height() ) ), \
				gtk.gdk.INTERP_BILINEAR )

		# recreate the pixmap to render to the screen
		self.generate_pixmap()

	def generate_pixmap( self ):
		widget = self.drawing_area
		x, y, width, height = widget.get_allocation()

		# calculate offsets to centre pic in drawing area
		pre_width = ( width - self.pic_scale.get_width() ) / 2
		pre_height = ( height - self.pic_scale.get_height() ) / 2
		post_width = width - self.pic_scale.get_width() - pre_width
		post_height = height - self.pic_scale.get_height() - pre_height

		# create pixmap
		self.pixmap = gtk.gdk.Pixmap( widget.window, width, height )

		# create composite pixbuf containing the main image
		pixbuf = self.pic_scale.copy()

		if self.copyright_pic != None and \
			getattr( self, "copyright_pic_scale", None ) != None:

			# work out position of copyright overlay
			if self.pos == "top-left" or self.pos == "bottom-left":
				x = 0
			if self.pos == "top-right" or self.pos == "bottom-right":
				x = self.pic_scale.get_width() - \
					self.copyright_pic_scale.get_width()
			if self.pos == "top-left" or self.pos == "top-right":
				y = 0
			if self.pos == "bottom-left" or self.pos == "bottom-right":
				y = self.pic_scale.get_height() - \
					self.copyright_pic_scale.get_height()

			# draw copyright
			self.copyright_pic_scale.composite( pixbuf, x, y, \
				self.copyright_pic_scale.get_width(), \
				self.copyright_pic_scale.get_height(), \
				x, y, 1, 1, gtk.gdk.INTERP_NEAREST, 255 )

		# draw composite pixbuf to the off-screen pixmap
		self.pixmap.draw_pixbuf( widget.get_style().white_gc, \
			pixbuf, 0, 0, pre_width, pre_height, \
			pixbuf.get_width(), pixbuf.get_height() )

		# draw black rectangles if the pic is being centred
		if pre_width > 0 or pre_height > 0:
			self.pixmap.draw_rectangle( widget.get_style().black_gc, True, \
				0, 0, \
				pre_width if pre_width > 0 else width, \
				pre_height if pre_height > 0 else height )
		if post_width > 0 or post_height > 0:
			self.pixmap.draw_rectangle( widget.get_style().black_gc, True, \
				width - post_width if post_width > 0 else 0, \
				height - post_height if post_height > 0 else 0, \
				post_width if post_width > 0 else width, \
				post_height if post_height > 0 else height )

	def move_pos( self, tok_from, tok_to ):

		# calculate copyright overlay pos
		pos = self.pos.replace( tok_from, tok_to, 1 )

		# redraw if necessary
		if self.pos != pos:
			self.pos = pos
			self.generate_pixmap()
			self.drawing_area.queue_draw()

	def drawing_area_expose_event( self, widget, event ):
		x, y, width, height = event.area
		widget.window.draw_drawable( \
			widget.get_style().fg_gc[ gtk.STATE_NORMAL ], \
			self.pixmap, x, y, x, y, width, height )
		return False