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mejoras varias. mejor manejo de no-imágenes, archivos no encontrados, espacios en nombres, paths vacíos.

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Mauro Torrez 2010-10-14 00:00:28 -03:00
parent d874888f29
commit 20c65a331e
1 changed files with 82 additions and 73 deletions
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155
set_gdm_backgroud.py
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@ -23,6 +23,7 @@ pygtk.require('2.0')
import gtk import gtk
import commands import commands
import os
# Check for new pygtk: this is new class in PyGtk 2.4 # Check for new pygtk: this is new class in PyGtk 2.4
if gtk.pygtk_version < (2,3,90): if gtk.pygtk_version < (2,3,90):
@ -30,7 +31,7 @@ if gtk.pygtk_version < (2,3,90):
raise SystemExit raise SystemExit
class App: class App:
path = "/usr/share/images/desktop-base/moreblue-orbit-gdm.svg" path = None
disp = "stretched" disp = "stretched"
conffile = "/etc/gdm3/greeter.gconf-defaults" conffile = "/etc/gdm3/greeter.gconf-defaults"
image = gtk.Image() image = gtk.Image()
@ -41,112 +42,115 @@ class App:
def redraw(self): def redraw(self):
# new pixbuf from current path # new pixbuf from current path
readimg = gtk.gdk.pixbuf_new_from_file(self.path) try:
imgw = readimg.get_width() readimg = gtk.gdk.pixbuf_new_from_file(self.path)
imgh = readimg.get_height() except:
readimg = None
print "WARNING: Unable to load image."
# calculate selected image and screen proportions (width-to-height ratio) # create an pixbuf for the thumbnail and fill it with a background pattern
disp_ratio = float(self.screenw)/float(self.screenh)
img_ratio = float(imgw)/float(imgh)
# actual width of the image on the screen thumbnail
thumbw = -1
thumbh = -1
# create an pixbuf for the thumbn, and fill it with a "background" pattern
thumbpixbuf = gtk.gdk.Pixbuf( gtk.gdk.COLORSPACE_RGB, True, 8, thumbpixbuf = gtk.gdk.Pixbuf( gtk.gdk.COLORSPACE_RGB, True, 8,
int(self.screenw/4.0), int(self.screenw/4.0),
int(self.screenh/4.0) ) int(self.screenh/4.0) )
thumbpixbuf.fill(0x88888888) thumbpixbuf.fill(0x88888888)
thumbpixbuf.saturate_and_pixelate(thumbpixbuf, 0.0, True) thumbpixbuf.saturate_and_pixelate(thumbpixbuf, 0.0, True)
# switch between the different disposition styles
if self.disp == "zoom":
# if display wider than image, scale image to fit screen width if readimg is not None:
if disp_ratio > img_ratio: imgw = readimg.get_width()
thumbw = int(self.screenw/4.0) imgh = readimg.get_height()
thumbh = int(imgh*((self.screenw/4.0)/imgw))
# else scale image to fit screen height # calculate selected image and screen proportions (width-to-height ratio)
else: disp_ratio = float(self.screenw)/float(self.screenh)
thumbh = int(self.screenh/4.0) img_ratio = float(imgw)/float(imgh)
thumbw = int(imgw*((self.screenh/4.0)/imgh))
# scale previously loaded image and copy to the screen thumbnail pixbuf # switch between the different disposition styles
readimg = readimg.scale_simple(thumbw,thumbh,gtk.gdk.INTERP_BILINEAR) if self.disp == "zoom":
readimg.copy_area( int((thumbw-self.screenw/4.0)/2),
# if display wider than image, scale image to fit screen width
if disp_ratio > img_ratio:
thumbw = int(self.screenw/4.0)
thumbh = int(imgh*((self.screenw/4.0)/imgw))
# else scale image to fit screen height
else:
thumbh = int(self.screenh/4.0)
thumbw = int(imgw*((self.screenh/4.0)/imgh))
# scale previously loaded image and copy to the screen thumbnail pixbuf
readimg = readimg.scale_simple(thumbw,thumbh,gtk.gdk.INTERP_BILINEAR)
readimg.copy_area( int((thumbw-self.screenw/4.0)/2),
int((thumbh-self.screenh/4.0)/2), int((thumbh-self.screenh/4.0)/2),
int(self.screenw/4), int(self.screenh/4), int(self.screenw/4), int(self.screenh/4),
thumbpixbuf, 0, 0) thumbpixbuf, 0, 0)
elif self.disp == "scaled": elif self.disp == "scaled":
# with the "scaled" disposition, image is scaled # with the "scaled" disposition, image is scaled
# so that it fits entirely onscreen # so that it fits entirely onscreen
xscale = (self.screenw/4.0)/imgw xscale = (self.screenw/4.0)/imgw
yscale = (self.screenh/4.0)/imgh yscale = (self.screenh/4.0)/imgh
thumbw = int(imgw*min(xscale, yscale)) thumbw = int(imgw*min(xscale, yscale))
thumbh = int(imgh*min(yscale, yscale)) thumbh = int(imgh*min(yscale, yscale))
readimg = readimg.scale_simple(thumbw,thumbh,gtk.gdk.INTERP_BILINEAR) readimg = readimg.scale_simple(thumbw,thumbh,gtk.gdk.INTERP_BILINEAR)
readimg.copy_area( 0, 0, thumbw, thumbh, thumbpixbuf, readimg.copy_area( 0, 0, thumbw, thumbh, thumbpixbuf,
int((self.screenw/4-thumbw)/2), int((self.screenw/4-thumbw)/2),
int((self.screenh/4-thumbh)/2)) int((self.screenh/4-thumbh)/2))
elif self.disp == "centered": elif self.disp == "centered":
# scale image to 1/4 its original size # scale image to 1/4 its original size
# (the screen thumbnail is 1/4 of the real screen size) # (the screen thumbnail is 1/4 of the real screen size)
readimg = readimg.scale_simple( int(imgw/4), int(imgh/4), readimg = readimg.scale_simple( int(imgw/4), int(imgh/4),
gtk.gdk.INTERP_BILINEAR) gtk.gdk.INTERP_BILINEAR)
# the visible area coordinates of the image # the visible area coordinates of the image
# (if negative, the image is bigger than the screen) # (if negative, the image is bigger than the screen)
x0 = int((self.screenw-imgw)/8) x0 = int((self.screenw-imgw)/8)
y0 = int((self.screenh-imgh)/8) y0 = int((self.screenh-imgh)/8)
readimg.copy_area( max(-x0,0), max(-y0,0), readimg.copy_area( max(-x0,0), max(-y0,0),
int(min(self.screenw/4,imgw/4)), int(min(self.screenw/4,imgw/4)),
int(min(self.screenh/4,imgh/4)), int(min(self.screenh/4,imgh/4)),
thumbpixbuf, max(x0,0), max(y0,0)) thumbpixbuf, max(x0,0), max(y0,0))
elif self.disp == "stretched": elif self.disp == "stretched":
# in this case, simply stretch image so that both width and height # in this case, simply stretch image so that both width and height
# are the same as the screen's # are the same as the screen's
readimg = readimg.scale_simple( int(self.screenw/4), readimg = readimg.scale_simple( int(self.screenw/4),
int(self.screenh/4), int(self.screenh/4),
gtk.gdk.INTERP_BILINEAR) gtk.gdk.INTERP_BILINEAR)
readimg.copy_area( 0, 0, int(self.screenw/4), int(self.screenh/4), readimg.copy_area( 0, 0, int(self.screenw/4), int(self.screenh/4),
thumbpixbuf, 0, 0) thumbpixbuf, 0, 0)
elif self.disp == "wallpaper": elif self.disp == "wallpaper":
# scale image to 1/4 as in centered # scale image to 1/4 as in centered
readimg = readimg.scale_simple( int(imgw/4), readimg = readimg.scale_simple( int(imgw/4),
int(imgh/4), int(imgh/4),
gtk.gdk.INTERP_BILINEAR) gtk.gdk.INTERP_BILINEAR)
# copy image as tiles until we fill the entire screen # copy image as tiles until we fill the entire screen
x0=0 x0=0
while( x0 < self.screenw ): while( x0 < self.screenw ):
y0=0 y0=0
while( y0 < self.screenh): while( y0 < self.screenh):
readimg.copy_area( 0, 0, readimg.copy_area( 0, 0,
int(min(self.screenw/4-x0,imgw/4)), int(min(self.screenw/4-x0,imgw/4)),
int(min(self.screenh/4-y0,imgh/4)), int(min(self.screenh/4-y0,imgh/4)),
thumbpixbuf, x0, y0) thumbpixbuf, x0, y0)
y0 += imgh/4 y0 += imgh/4
x0 += imgw/4 x0 += imgw/4
# finally draw the gtk.Image from the pixbuf # finally draw the gtk.Image from the pixbuf
self.image.set_from_pixbuf(thumbpixbuf) self.image.set_from_pixbuf(thumbpixbuf)
# read GDM3 configuration file, and set correspondig variables # read GDM3 configuration file, and set correspondig variables
def read_config( self ): def read_config( self ):
@ -154,12 +158,16 @@ class App:
with open( self.conffile, 'r') as conf: with open( self.conffile, 'r') as conf:
for line in conf: for line in conf:
m1 = re.match(r"\s*/desktop/gnome/background/picture_filename\s+((?:\S*(?:(?<=\\)\s)*)+)", line) m1 = re.match(r"^\s*/desktop/gnome/background/picture_filename\s+(\S.*)$", line)
m2 = re.match(r"\s*/desktop/gnome/background/picture_options\s+(\w+)", line) m2 = re.match(r"^\s*/desktop/gnome/background/picture_options\s+(\w+)", line)
if m1: if m1:
print "Image file option read: " + m1.group(1) if os.path.isfile( m1.group(1)):
self.path = m1.group(1) print "Image file option read: " + m1.group(1)
self.path = m1.group(1)
else:
print "Image file not found"
self.path = None
elif m2: elif m2:
print "Image disposition option read: " + m2.group(1) print "Image disposition option read: " + m2.group(1)
@ -172,19 +180,19 @@ class App:
out = "" out = ""
for line in conf: for line in conf:
m1 = re.match(r"\s*/desktop/gnome/background/picture_filename\s+((?:\S*(?:(?<=\\)\s)*)+)", line) m1 = re.match(r"^\s*/desktop/gnome/background/picture_filename", line)
m2 = re.match(r"\s*/desktop/gnome/background/picture_options\s+(\w+)", line) m2 = re.match(r"^\s*/desktop/gnome/background/picture_options", line)
# if the current line matchs the picture_filename option, replace # if the current line matchs the picture_filename option, replace
# it with a new one containing the current value of path # it with a new one containing the current value of path
if m1: if m1:
out += "/desktop/gnome/background/picture_filename " \ out += "/desktop/gnome/background/picture_filename " \
+ self.path + "\n" + self.path + "\n"
# else if it macthes the picture_options option, put the # else if it macthes the picture_options option, put the
# value of disp instead # value of disp instead
elif m2: elif m2:
out += "/desktop/gnome/background/picture_options "\ out += "/desktop/gnome/background/picture_options "\
+ self.disp + "\n" + self.disp + "\n"
# else copy the line as-is # else copy the line as-is
@ -273,8 +281,9 @@ class App:
while self.combo.get_active_text() != self.disp: while self.combo.get_active_text() != self.disp:
i+=1 i+=1
self.combo.set_active( i ) self.combo.set_active( i )
self.filedialog.set_filename(self.path) if self.path is not None:
self.filedialog.set_filename(self.path)
#self.window.set_border_width(4) #self.window.set_border_width(4)