def badge_png(ds):
"""
make a badge image based on real data
>>> badge_png(test_dataset())[1:4]
'PNG'
"""
# This is for badge_png preview image:
try: import poppler
except:
err_missing('Python-poppler library not installed; can\'t generate preview.')
try: from gtk.gdk import Pixbuf,COLORSPACE_RGB
except: err_missing( 'Library not installed: gtk.gdk; can\'t generate preview.')
######
# get pdf
pdf = mkpdf(ds,sample=True)
# render pdf onto pixbuf
pixbuf = Pixbuf(COLORSPACE_RGB,False,8,286,225)
doc = poppler.document_new_from_data(pdf,len(pdf),password='')
page0=doc.get_page(0)
page0.render_to_pixbuf(0,0,8,11,1,0,pixbuf)
# save pixbuf as png
# There has to be a better way to get the image?
lst=[]
pixbuf.save_to_callback(lambda b,l: l.append(b), 'png', user_data=lst)
png=''.join(lst)
return png
def transform_pixbuf(p, dest_size, scale):
dest = Pixbuf(p.props.colorspace, p.props.has_alpha,
p.props.bits_per_sample, dest_size, dest_size)
dest.fill(0)
s = dest_size * scale / max(p.get_width(), p.get_height())
offset_x = int(round((dest_size - p.get_width() * s) / 2))
offset_y = int(round((dest_size - p.get_height() * s) / 2))
dest_width = int(round(min(dest_size-offset_x, s*p.get_width())))
dest_height = int(round(min(dest_size-offset_y, s*p.get_height())))
p.scale(dest, offset_x, offset_y, dest_width, dest_height, offset_x, offset_y, s, s, INTERP_HYPER)
return dest
def transform_pixbuf(p, dest_size, scale):
dest = Pixbuf(p.props.colorspace, p.props.has_alpha,
p.props.bits_per_sample, dest_size, dest_size)
dest.fill(0)
s = dest_size * scale / max(p.get_width(), p.get_height())
offset_x = int(round((dest_size - p.get_width() * s) / 2))
offset_y = int(round((dest_size - p.get_height() * s) / 2))
dest_width = int(round(min(dest_size - offset_x, s * p.get_width())))
dest_height = int(round(min(dest_size - offset_y, s * p.get_height())))
p.scale(dest, offset_x, offset_y, dest_width, dest_height, offset_x,
offset_y, s, s, INTERP_HYPER)
return dest
def motion_notify_event(self, win, event):
"""Mouse motion_notify_event handler"""
pixbuf = Pixbuf(COLORSPACE_RGB, False, 8, 1, 1)
root = get_default_root_window()
xcoord, ycoord = event.get_root_coords()
from_draw = pixbuf.get_from_drawable(root, root.get_colormap(),
int(xcoord), int(ycoord),
0, 0, 1, 1)
pixel = from_draw.get_pixels_array()[0][0]
self.rgb = (pixel[0], pixel[1], pixel[2])
self.draw_color()
self.label.set_label(rgb_to_string(self.rgb).upper())
def grab_to_file(self, filename):
'''
based on: http://stackoverflow.com/questions/69645/take-a-screenshot-via-a-python-script-linux
http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html
only "jpeg" or "png"
'''
w = get_default_root_window()
sz = w.get_size()
#print "The size of the window is %d x %d" % sz
pb = Pixbuf(COLORSPACE_RGB, False, 8, sz[0], sz[1]) # 24bit RGB
pb = pb.get_from_drawable(w, w.get_colormap(), 0, 0, 0, 0, sz[0], sz[1])
assert pb
type = "png"
if filename.endswith('.jpeg'):
type = "jpeg"
pb.save(filename, type)
def grab_to_file(self, filename):
'''
based on: http://stackoverflow.com/questions/69645/take-a-screenshot-via-a-python-script-linux
http://www.pygtk.org/docs/pygtk/class-gdkpixbuf.html
only "jpeg" or "png"
'''
w = get_default_root_window()
sz = w.get_size()
#print "The size of the window is %d x %d" % sz
pb = Pixbuf(COLORSPACE_RGB, False, 8, sz[0], sz[1]) # 24bit RGB
pb = pb.get_from_drawable(w, w.get_colormap(), 0, 0, 0, 0, sz[0],
sz[1])
assert pb
type = "png"
if filename.endswith('.jpeg'):
type = "jpeg"
pb.save(filename, type)
def setup_box(name, r = 0.0, g = 0.0, b = 1.0):
"""Does all the heavy lifting of setting up a box in a pix buffer."""
color_depth = 8
icon_width = 128
icon_height = 64
pixbuf = Pixbuf(gtk.gdk.COLORSPACE_RGB, # color space
True, # has alpha
color_depth, # color depth
icon_width, # width
icon_height) # height
# pixbuf = gtk.gdk.pixbuf_new_from_file_at_size("./images/slave_icon.png", 64, 128)
pix_data = pixbuf.get_pixels_array()
surface = cairo.ImageSurface.create_for_data(pix_data, \
cairo.FORMAT_RGB24, \
pixbuf.get_width(), \
pixbuf.get_height(), \
pixbuf.get_rowstride())
color = gtk.gdk.Color(0x0000, 0x0000, 0xFFFF) # Blue
cr = cairo.Context(surface)
cr.set_operator(cairo.OPERATOR_OVER)
cr.set_source_rgba(color16_to_cairo(b * 0xFFFF), \
color16_to_cairo(g * 0xFFFF), \
color16_to_cairo(r * 0xFFFF), \
1.0) # alpha = 1.0
cr.rectangle(0, 0, icon_width, icon_height)
cr.fill()
cr.set_source_rgb(0.0, 0.0, 0.0)
cr.rectangle(0, 0, icon_width, icon_height)
cr.set_line_width(5.0)
cr.stroke()
cr.set_source_rgba(0.0, 0.0, 0.0, 1.0)
cr.set_font_size(10)
x_bearing, y_bearing, twidth, theight = cr.text_extents(name)[:4]
text_x = 0.5 - twidth / 2 - x_bearing
text_y = 0.5 - theight / 2 - y_bearing
pos_x = 0 + (icon_width / 2.0) + text_x
pos_y = 0 + (icon_height / 2.0) + text_y
cr.move_to(pos_x, pos_y)
cr.show_text(name)
surface.flush()
surface.finish()
return pixbuf
def create_blank_pixbuf(size=16):
pix = Pixbuf(COLORSPACE_RGB, True, 8, size, size)
pix.fill(0x0)
return pix
def create_blank_pixbuf(size=16):
pix = Pixbuf(COLORSPACE_RGB, True, 8, size, size)
pix.fill(0x0)
return pix
