canv2.plot( [ux0,ux0,ux1,ux1,ux0],[uy0,uy1,uy1,uy0,uy0],
color_rgba=(1,0,0,1))
# test the with statement (not using as)
with canv.set_user_coords(device_rect, user_rect,
transform=transform):
for pt in pts:
canv.scatter( [pt[0]], [pt[1]], radius=0.5,
color_rgba=(0.2,0.2,0.6,0.5) )
if 1:
# draw boundary of above coord system
canv.plot( [device_rect[0],device_rect[0],
device_rect[0]+device_rect[2],
device_rect[0]+device_rect[2],
device_rect[0],],
[device_rect[1],device_rect[1]+device_rect[3],
device_rect[1]+device_rect[3],device_rect[1],
device_rect[1],],
color_rgba=(0,0.5,0,1) ) # dark green
# draw blue star
canv.poly( [0,50,100,0,100,0], [100,0,100,50,50,100], color_rgba=(0,0,1,1),
edgewidth=5 )
for pt in pts:
x,y = canv.get_transformed_point(pt[0],pt[1],device_rect,user_rect,
transform=transform)
canv.text( '%s, %s'%(pt[0],pt[1]), x,y )
canv.save()
actual_out_w, actual_out_h = negotiate_panel_size(panels)
tmp_fname = tempfile.mktemp('.png')
canv = Canvas(tmp_fname,actual_out_w,actual_out_h)
canv.poly([0,0,actual_out_w,actual_out_w,0],[0,actual_out_h,actual_out_h,0,0], color_rgba=(0,0,0,1))
#big lena
p = panels["lena"]
device_rect,user_rect = get_panel_rects(p)
with canv.set_user_coords(device_rect, user_rect):
canv.imshow(lena, 0,0, filter='best' )
#in pixel coordinates!
xpx = np.arange(50,150)
ypx = (np.sin(xpx)*100) + 150
canv.plot(xpx,ypx, color_rgba=(1,0,0,1))
#draw 1/4 size lena in bottom left
device_rect = (
0,
actual_out_h-(ih//4),
iw//4,
ih//4
)
user_rect = (0,0,ilena.shape[1], ilena.shape[0])
with canv.set_user_coords(device_rect, user_rect):
canv.imshow(ilena, 0,0, filter='best' )
#in pixel coordinates
col = 20; row = 80
canv.scatter([col], [row], color_rgba=(0.4,0,0.6,0.8), radius=6, markeredgewidth=5 )
