#Copyright (c) 2007-8, Playful Invention Company.
#Copyright (c) 2008-11, Walter Bender
#Copyright (c) 2011 Collabora Ltd.
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
import gtk
from math import sin, cos, atan, pi, sqrt
import pango
import cairo
import pangocairo
import base64
from gettext import gettext as _
from sprites import Sprite
from tasprite_factory import SVG
from tautils import image_to_base64, get_path, data_to_string, round_int, \
debug_output
from taconstants import CANVAS_LAYER, BLACK, WHITE
def wrap100(n):
""" A variant on mod... 101 -> 99; 199 -> 1 """
n = int(n)
n %= 200
if n > 99:
n = 199 - n
return n
def calc_poly_bounds(poly_points):
""" Calculate the minx, miny, width, height of polygon """
minx = poly_points[0][0]
miny = poly_points[0][1]
maxx, maxy = minx, miny
for p in poly_points:
if p[0] < minx:
minx = p[0]
elif p[0] > maxx:
maxx = p[0]
if p[1] < miny:
miny = p[1]
elif p[1] > maxy:
maxy = p[1]
return(minx, miny, maxx - minx, maxy - miny)
def calc_shade(c, s, invert=False):
""" Convert a color to the current shade (lightness/darkness). """
# Assumes 16 bit input values
if invert:
if s < 0:
return int(c / (1 + s * 0.8))
return int((c - 65536 * s * 0.9) / (1 - (s * 0.9)))
else:
if s < 0:
return int(c * (1 + s * 0.8))
return int(c + (65536 - c) * s * 0.9)
def calc_gray(c, g, invert=False):
""" Gray is a psuedo saturation calculation. """
# Assumes 16 bit input values
if g == 100:
return c
if invert:
if g == 0:
return c
else:
return int(((c * 100) - (32768 * (100 - g))) / g)
else:
return int(((c * g) + (32768 * (100 - g))) / 100)
colors = {}
DEGTOR = 2 * pi / 360
COLOR_TABLE = (
0xFF0000, 0xFF0D00, 0xFF1A00, 0xFF2600, 0xFF3300,
0xFF4000, 0xFF4D00, 0xFF5900, 0xFF6600, 0xFF7300,
0xFF8000, 0xFF8C00, 0xFF9900, 0xFFA600, 0xFFB300,
0xFFBF00, 0xFFCC00, 0xFFD900, 0xFFE600, 0xFFF200,
0xFFFF00, 0xE6FF00, 0xCCFF00, 0xB3FF00, 0x99FF00,
0x80FF00, 0x66FF00, 0x4DFF00, 0x33FF00, 0x1AFF00,
0x00FF00, 0x00FF0D, 0x00FF1A, 0x00FF26, 0x00FF33,
0x00FF40, 0x00FF4D, 0x00FF59, 0x00FF66, 0x00FF73,
0x00FF80, 0x00FF8C, 0x00FF99, 0x00FFA6, 0x00FFB3,
0x00FFBF, 0x00FFCC, 0x00FFD9, 0x00FFE6, 0x00FFF2,
0x00FFFF, 0x00F2FF, 0x00E6FF, 0x00D9FF, 0x00CCFF,
0x00BFFF, 0x00B3FF, 0x00A6FF, 0x0099FF, 0x008CFF,
0x0080FF, 0x0073FF, 0x0066FF, 0x0059FF, 0x004DFF,
0x0040FF, 0x0033FF, 0x0026FF, 0x001AFF, 0x000DFF,
0x0000FF, 0x0D00FF, 0x1A00FF, 0x2600FF, 0x3300FF,
0x4000FF, 0x4D00FF, 0x5900FF, 0x6600FF, 0x7300FF,
0x8000FF, 0x8C00FF, 0x9900FF, 0xA600FF, 0xB300FF,
0xBF00FF, 0xCC00FF, 0xD900FF, 0xE600FF, 0xF200FF,
0xFF00FF, 0xFF00E6, 0xFF00CC, 0xFF00B3, 0xFF0099,
0xFF0080, 0xFF0066, 0xFF004D, 0xFF0033, 0xFF001A)
class TurtleGraphics:
""" A class for the Turtle graphics canvas """
def __init__(self, tw, width, height):
""" Create a sprite to hold the canvas. """
self.tw = tw
self.width = width
self.height = height
print type(self.tw.turtle_canvas)
# Build a cairo.Context from a cairo.XlibSurface
self.canvas = cairo.Context(self.tw.turtle_canvas)
cr = gtk.gdk.CairoContext(self.canvas)
# print cr.get_current_point()
cr.set_line_cap(1) # Set the line cap to be round
self.tw.sprite_list.set_cairo_context(self.canvas)
self.cx = 0
self.cy = 0
self.fgrgb = [255, 0, 0]
self.bgrgb = [255, 248, 222]
self.textsize = 48 # deprecated
self.tw.active_turtle.show()
self.shade = 0
self.pendown = False
self.xcor = 0
self.ycor = 0
self.heading = 0
self.pensize = 5
self.color = 0
self.gray = 100
self.fill = False
self.poly_points = []
self.svg = SVG()
self.svg.set_fill_color('none')
self.tw.svg_string = ''
self.clearscreen(False)
def start_fill(self):
""" Start accumulating points of a polygon to fill. """
self.fill = True
self.poly_points = []
if self.tw.saving_svg:
self.tw.svg_string += ''
def stop_fill(self):
""" Fill the polygon. """
self.fill = False
if len(self.poly_points) == 0:
return
self.fill_polygon(self.poly_points)
if self.tw.sharing():
shared_poly_points = []
for p in self.poly_points:
shared_poly_points.append((self.screen_to_turtle_coordinates(
p[0], p[1])))
event = "F|%s" % (data_to_string([self._get_my_nick(),
shared_poly_points]))
self.tw.send_event(event)
self.poly_points = []
if self.tw.saving_svg:
self.tw.svg_string += ''
def fill_polygon(self, poly_points):
""" Draw the polygon... """
minx, miny, w, h = calc_poly_bounds(poly_points)
self.canvas.new_path()
for i, p in enumerate(poly_points):
if i == 0:
self.canvas.move_to(p[0], p[1])
else:
self.canvas.line_to(p[0], p[1])
self.canvas.close_path()
self.canvas.fill()
if self.tw.saving_svg and self.pendown:
self.svg.set_fill_color("#%02x%02x%02x" % (self.fgrgb[0],
self.fgrgb[1],
self.fgrgb[2]))
self.tw.svg_string += self.svg.new_path(poly_points[0][0],
poly_points[0][1])
for p in range(len(poly_points)):
if p > 0:
self.tw.svg_string += self.svg.line_to(poly_points[p][0],
poly_points[p][1])
self.tw.svg_string += "\"\n"
self.tw.svg_string += self.svg.style()
self.svg.set_fill_color('none')
def clearscreen(self, share=True):
"""Clear the canvas and reset most graphics attributes to defaults."""
self.canvas.move_to(0, 0)
self.canvas.set_source_rgb(self.bgrgb[0] / 255.,
self.bgrgb[1] / 255.,
self.bgrgb[2] / 255.)
self.canvas.rectangle(0, 0, self.width * 2, self.height * 2)
self.canvas.fill()
self.inval()
self.setpensize(5, share)
self.setgray(100, share)
self.setcolor(0, share)
self.setshade(50, share)
for turtle_key in iter(self.tw.turtles.dict):
# Don't reset remote turtles
if not self.tw.remote_turtle(turtle_key):
self.set_turtle(turtle_key)
self.tw.active_turtle.set_color(0)
self.tw.active_turtle.set_shade(50)
self.tw.active_turtle.set_gray(100)
self.tw.active_turtle.set_pen_size(5)
self.tw.active_turtle.reset_shapes()
self.seth(0, share)
self.setpen(False, share)
self.setxy(0, 0, share)
self.setpen(True, share)
self.tw.active_turtle.hide()
self.set_turtle(self.tw.default_turtle_name)
self.tw.svg_string = ''
self.svg.reset_min_max()
self.fill = False
self.poly_points = []
def forward(self, n, share=True):
""" Move the turtle forward."""
nn = n * self.tw.coord_scale
self.canvas.set_source_rgb(self.fgrgb[0] / 255., self.fgrgb[1] / 255.,
self.fgrgb[2] / 255.)
oldx, oldy = self.xcor, self.ycor
try:
self.xcor += nn * sin(self.heading * DEGTOR)
self.ycor += nn * cos(self.heading * DEGTOR)
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
if self.pendown:
self.draw_line(oldx, oldy, self.xcor, self.ycor)
self.move_turtle()
if self.tw.sharing() and share:
event = "f|%s" % (data_to_string([self._get_my_nick(), int(n)]))
self.tw.send_event(event)
self.tw.window.queue_draw_area(0,
0,
self.width,
self.height)
def seth(self, n, share=True):
""" Set the turtle heading. """
try:
self.heading = n
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.heading %= 360
self.turn_turtle()
if self.tw.sharing() and share:
event = "r|%s" % (data_to_string([self._get_my_nick(),
round_int(self.heading)]))
self.tw.send_event(event)
def right(self, n, share=True):
""" Rotate turtle clockwise """
try:
self.heading += n
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.heading %= 360
self.turn_turtle()
if self.tw.sharing() and share:
event = "r|%s" % (data_to_string([self._get_my_nick(),
round_int(self.heading)]))
self.tw.send_event(event)
def arc(self, a, r, share=True):
""" Draw an arc """
self.canvas.set_source_rgb(self.fgrgb[0] / 255., self.fgrgb[1] / 255.,
self.fgrgb[2] / 255.)
rr = r * self.tw.coord_scale
try:
if a < 0:
self.larc(-a, rr)
else:
self.rarc(a, rr)
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.move_turtle()
if self.tw.sharing() and share:
event = "a|%s" % (data_to_string([self._get_my_nick(),
[round_int(a), round_int(r)]]))
self.tw.send_event(event)
def rarc(self, a, r):
""" draw a clockwise arc """
if r < 0:
r = -r
a = -a
s = 0
else:
s = 1
oldx, oldy = self.xcor, self.ycor
cx = self.xcor + r * cos(self.heading * DEGTOR)
cy = self.ycor - r * sin(self.heading * DEGTOR)
if self.pendown:
x, y = self.turtle_to_screen_coordinates(cx, cy)
self.canvas.arc(x, y, r,
(self.heading - 180) * DEGTOR,
(self.heading - 180 + a) * DEGTOR)
self.canvas.stroke()
self.inval()
self.right(a, False)
self.xcor = cx - r * cos(self.heading * DEGTOR)
self.ycor = cy + r * sin(self.heading * DEGTOR)
if self.tw.saving_svg and self.pendown:
x, y = self.turtle_to_screen_coordinates(oldx, oldy)
self.tw.svg_string += self.svg.new_path(x, y)
x, y = self.turtle_to_screen_coordinates(self.xcor, self.ycor)
self.tw.svg_string += self.svg.arc_to(x, y, r, a, 0, s)
self.tw.svg_string += '"\n'
self.tw.svg_string += self.svg.style()
def larc(self, a, r):
""" draw a counter-clockwise arc """
if r < 0:
r = -r
a = -a
s = 1
else:
s = 0
oldx, oldy = self.xcor, self.ycor
cx = self.xcor - r * cos(self.heading * DEGTOR)
cy = self.ycor + r * sin(self.heading * DEGTOR)
if self.pendown:
x, y = self.turtle_to_screen_coordinates(cx, cy)
self.canvas.arc_negative(x, y, r,
(self.heading) * DEGTOR,
(self.heading - a) * DEGTOR)
self.canvas.stroke()
self.inval()
self.right(-a, False)
self.xcor = cx + r * cos(self.heading * DEGTOR)
self.ycor = cy - r * sin(self.heading * DEGTOR)
if self.tw.saving_svg and self.pendown:
x, y = self.turtle_to_screen_coordinates(oldx, oldy)
self.tw.svg_string += self.svg.new_path(x, y)
x, y = self.turtle_to_screen_coordinates(self.xcor, self.ycor)
self.tw.svg_string += self.svg.arc_to(x, y, r, a, 0, s)
self.tw.svg_string += '"\n'
self.tw.svg_string += self.svg.style()
def setxy(self, x, y, share=True, pendown=True):
""" Move turtle to position x,y """
oldx, oldy = self.xcor, self.ycor
x *= self.tw.coord_scale
y *= self.tw.coord_scale
try:
self.xcor, self.ycor = x, y
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
if self.pendown and pendown:
self.canvas.set_source_rgb(self.fgrgb[0] / 255.,
self.fgrgb[1] / 255.,
self.fgrgb[2] / 255.)
self.draw_line(oldx, oldy, self.xcor, self.ycor)
self.move_turtle()
if self.tw.sharing() and share:
event = "x|%s" % (data_to_string([self._get_my_nick(),
[round_int(x), round_int(y)]]))
self.tw.send_event(event)
def setpensize(self, ps, share=True):
""" Set the pen size """
try:
if ps < 0:
ps = 0
self.pensize = ps
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.tw.active_turtle.set_pen_size(ps)
self.canvas.set_line_width(ps)
self.svg.set_stroke_width(self.pensize)
if self.tw.sharing() and share:
event = "w|%s" % (data_to_string([self._get_my_nick(),
round_int(ps)]))
self.tw.send_event(event)
def setcolor(self, c, share=True):
""" Set the pen color """
try:
self.color = c
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.tw.active_turtle.set_color(c)
self.set_fgcolor()
if self.tw.sharing() and share:
event = "c|%s" % (data_to_string([self._get_my_nick(),
round_int(c)]))
self.tw.send_event(event)
def setgray(self, g, share=True):
""" Set the gray level """
try:
self.gray = g
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
if self.gray < 0:
self.gray = 0
if self.gray > 100:
self.gray = 100
self.set_fgcolor()
self.tw.active_turtle.set_gray(self.gray)
if self.tw.sharing() and share:
event = "g|%s" % (data_to_string([self._get_my_nick(),
round_int(self.gray)]))
self.tw.send_event(event)
def set_textcolor(self):
""" Deprecated: Set the text color to foreground color. """
return
def settextcolor(self, c): # deprecated
""" Set the text color """
return
def settextsize(self, c): # deprecated
""" Set the text size """
try:
self.tw.textsize = c
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
def setshade(self, s, share=True):
""" Set the color shade """
try:
self.shade = s
except TypeError, ValueError:
debug_output("bad value sent to %s" % (__name__),
self.tw.running_sugar)
return
self.tw.active_turtle.set_shade(s)
self.set_fgcolor()
if self.tw.sharing() and share:
event = "s|%s" % (data_to_string([self._get_my_nick(),
round_int(s)]))
self.tw.send_event(event)
def fillscreen(self, c, s):
""" Fill screen with color/shade and reset to defaults """
oldc, olds = self.color, self.shade
self.setcolor(c, False)
self.setshade(s, False)
self.canvas.set_source_rgb(self.fgrgb[0] / 255.,
self.fgrgb[1] / 255.,
self.fgrgb[2] / 255.)
self.bgrgb = self.fgrgb[:]
self.canvas.rectangle(0, 0, self.width * 2, self.height * 2)
self.canvas.fill()
self.inval()
self.setcolor(oldc, False)
self.setshade(olds, False)
self.tw.svg_string = ''
self.svg.reset_min_max()
self.fill = False
self.poly_points = []
def set_fgcolor(self):
""" Set the foreground color """
if self.color == WHITE or self.shade == WHITE:
r = 0xFF00
g = 0xFF00
b = 0xFF00
elif self.color == BLACK or self.shade == BLACK:
r = 0x0000
g = 0x0000
b = 0x0000
else:
sh = (wrap100(self.shade) - 50) / 50.0
rgb = COLOR_TABLE[wrap100(self.color)]
r = (rgb >> 8) & 0xff00
r = calc_gray(r, self.gray)
r = calc_shade(r, sh)
g = rgb & 0xff00
g = calc_gray(g, self.gray)
g = calc_shade(g, sh)
b = (rgb << 8) & 0xff00
b = calc_gray(b, self.gray)
b = calc_shade(b, sh)
self.fgrgb = [r >> 8, g >> 8, b >> 8]
self.svg.set_stroke_color("#%02x%02x%02x" % (self.fgrgb[0],
self.fgrgb[1],
self.fgrgb[2]))
def setpen(self, bool, share=True):
""" Lower or raise the pen """
self.pendown = bool
self.tw.active_turtle.set_pen_state(bool)
if self.tw.sharing() and share:
event = "p|%s" % (data_to_string([self._get_my_nick(), bool]))
self.tw.send_event(event)
def draw_pixbuf(self, pixbuf, a, b, x, y, w, h, path, share=True):
""" Draw a pixbuf """
'''
# Fix me: rotate image
r = sqrt(x*x + y*y)
if x != 0:
angle = atan(y/x) # initial angle relative to the origin
else:
angle = 0.
angle += self.heading * DEGTOR # add in heading
nx = cos(angle) * r
ny = sin(angle) * r
'''
# Build a gtk.gdk.CairoContext from a cairo.Context to access
# the set_source_pixbuf attribute.
cr = gtk.gdk.CairoContext(self.canvas)
cr.save()
# cr.translate(-x, -y)
# cr.rotate(self.heading * DEGTOR)
# cr.translate(nx, ny)
cr.set_source_pixbuf(pixbuf, x, y)
# To do: reposition rectangle based on angle of rotation
cr.rectangle(x, y, w, h)
cr.fill()
cr.restore()
self.inval()
if self.tw.saving_svg:
if self.tw.running_sugar:
# In Sugar, we need to embed the images inside the SVG
self.tw.svg_string += self.svg.image(x - self.width / 2,
y, w, h, path, image_to_base64(pixbuf,
get_path(self.tw.activity, 'instance')))
else:
# Outside of Sugar, we save a path
self.tw.svg_string += self.svg.image(x - self.width / 2,
y, w, h, path)
if self.tw.sharing() and share:
if self.tw.running_sugar:
tmp_path = get_path(self.tw.activity, 'instance')
else:
tmp_path = '/tmp'
data = image_to_base64(pixbuf, tmp_path)
height = pixbuf.get_height()
width = pixbuf.get_width()
x, y = self.screen_to_turtle_coordinates(x, y)
event = "P|%s" % (data_to_string([self._get_my_nick(),
[round_int(a), round_int(b),
round_int(x), round_int(y),
round_int(w), round_int(h),
round_int(width),
round_int(height),
data]]))
self.tw.send_event(event)
def draw_text(self, label, x, y, size, w, share=True):
""" Draw text """
w *= self.tw.coord_scale
cr = pangocairo.CairoContext(self.canvas)
pl = cr.create_layout()
fd = pango.FontDescription('Sans')
fd.set_size(int(size * self.tw.coord_scale) * pango.SCALE)
pl.set_font_description(fd)
if type(label) == str or type(label) == unicode:
pl.set_text(label.replace('\0', ' '))
elif type(label) == float or type(label) == int:
pl.set_text(str(label))
else:
pl.set_text(str(label))
pl.set_width(int(w) * pango.SCALE)
cr.save()
cr.translate(x, y)
cr.rotate(self.heading * DEGTOR)
self.canvas.set_source_rgb(self.fgrgb[0] / 255.,
self.fgrgb[1] / 255.,
self.fgrgb[2] / 255.)
cr.update_layout(pl)
cr.show_layout(pl)
cr.restore()
self.inval()
if self.tw.saving_svg: # and self.pendown:
self.tw.svg_string += self.svg.text(x, # - self.width / 2,
y + size, size, w, label)
if self.tw.sharing() and share:
event = "W|%s" % (data_to_string([self._get_my_nick(),
[label, round_int(x),
round_int(y), round_int(size),
round_int(w)]]))
self.tw.send_event(event)
def turtle_to_screen_coordinates(self, x, y):
""" The origin of turtle coordinates is the center of the screen """
return self.width / 2. + x, self.invert_y_coordinate(y)
def screen_to_turtle_coordinates(self, x, y):
""" The origin of the screen coordinates is the upper left corner """
return x - self.width / 2., self.invert_y_coordinate(y)
def invert_y_coordinate(self, y):
""" Positive y goes up in turtle coordinates, down in sceeen
coordinates """
return self.height / 2. - y
def draw_line(self, x1, y1, x2, y2):
""" Draw a line """
x1, y1 = self.turtle_to_screen_coordinates(x1, y1)
x2, y2 = self.turtle_to_screen_coordinates(x2, y2)
if x1 < x2:
minx, maxx = int(x1), int(x2)
else:
minx, maxx = int(x2), int(x1)
if y1 < y2:
miny, maxy = int(y1), int(y2)
else:
miny, maxy = int(y2), int(y1)
w, h = maxx - minx, maxy - miny
self.canvas.move_to(x1, y1)
self.canvas.line_to(x2, y2)
self.canvas.stroke()
if self.fill and self.poly_points == []:
self.poly_points.append((int(x1), int(y1)))
if self.fill:
self.poly_points.append((int(x2), int(y2)))
if self.tw.saving_svg and self.pendown:
self.tw.svg_string += self.svg.new_path(x1, y1)
self.tw.svg_string += self.svg.line_to(x2, y2)
self.tw.svg_string += "\"\n"
self.tw.svg_string += self.svg.style()
def turn_turtle(self):
""" Change the orientation of the turtle """
self.tw.active_turtle.set_heading(self.heading)
def move_turtle(self):
""" Move the turtle """
x, y = self.turtle_to_screen_coordinates(self.xcor, self.ycor)
self.tw.active_turtle.move(
(int(self.cx + x - self.tw.active_turtle.spr.rect.width / 2.),
int(self.cy + y - self.tw.active_turtle.spr.rect.height / 2.)))
def get_color_index(self, r, g, b, a=0):
""" Find the closest palette entry to the rgb triplet """
if self.shade != 50 or self.gray != 100:
r <<= 8
g <<= 8
b <<= 8
if self.shade != 50:
sh = (wrap100(self.shade) - 50) / 50.
r = calc_shade(r, sh, True)
g = calc_shade(g, sh, True)
b = calc_shade(b, sh, True)
if self.gray != 100:
r = calc_gray(r, self.gray, True)
g = calc_gray(g, self.gray, True)
b = calc_gray(b, self.gray, True)
r >>= 8
g >>= 8
b >>= 8
min_distance = 1000000
closest_color = -1
for i, c in enumerate(COLOR_TABLE):
cr = int((c & 0xff0000) >> 16)
cg = int((c & 0x00ff00) >> 8)
cb = int((c & 0x0000ff))
distance_squared = \
((cr - r) ** 2) + ((cg - g) ** 2) + ((cb - b) ** 2)
if distance_squared == 0:
return i
if distance_squared < min_distance:
min_distance = distance_squared
closest_color = i
return closest_color
def get_pixel(self):
""" Read the pixel at x, y """
# FIX ME: broken for Cairo
if self.tw.interactive_mode:
x, y = self.turtle_to_screen_coordinates(self.xcor, self.ycor)
return self.canvas.get_pixel((int(x), int(y)), 0,
self.tw.color_mode)
else:
return(-1, -1, -1, -1)
def set_turtle(self, k, colors=None):
""" Select the current turtle and associated pen status """
if k not in self.tw.turtles.dict:
# if it is a new turtle, start it in the center of the screen
self.tw.active_turtle = self.tw.turtles.get_turtle(k, True, colors)
self.seth(0, False)
self.setxy(0, 0, False, pendown=False)
self.tw.active_turtle.set_pen_state(True)
elif colors is not None:
self.tw.active_turtle = self.tw.turtles.get_turtle(k, False)
self.tw.active_turtle.set_turtle_colors(colors)
else:
self.tw.active_turtle = self.tw.turtles.get_turtle(k, False)
self.tw.active_turtle.show()
tx, ty = self.tw.active_turtle.get_xy()
self.xcor, self.ycor = self.screen_to_turtle_coordinates(tx, ty)
self.xcor += self.tw.active_turtle.spr.rect.width / 2.
self.ycor -= self.tw.active_turtle.spr.rect.height / 2.
self.heading = self.tw.active_turtle.get_heading()
self.setcolor(self.tw.active_turtle.get_color(), False)
self.setgray(self.tw.active_turtle.get_gray(), False)
self.setshade(self.tw.active_turtle.get_shade(), False)
self.setpensize(self.tw.active_turtle.get_pen_size(), False)
self.setpen(self.tw.active_turtle.get_pen_state(), False)
def svg_close(self):
""" Close current SVG graphic """
if self.tw.svg_string == '':
return
self.svg.calc_w_h(False)
self.tw.svg_string = "%s%s%s%s" % (self.svg.header(True),
self.svg.background("#%02x%02x%02x" % \
(self.bgrgb[0], self.bgrgb[1], self.bgrgb[2])),
self.tw.svg_string, self.svg.footer())
def _get_my_nick(self):
return self.tw.nick
def inval(self):
''' Invalidate a region for gtk '''
self.tw.window.queue_draw_area(0, 0, self.width, self.height)