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import cairo
import pango
from math import *
from fringwalker import sum_list
import os
class Hotspot:
def __init__(self, minpos, maxpos, folder):
self.minx,self.miny = minpos
self.maxx,self.maxy = maxpos
self.folder = folder
class FringRenderer:
def __init__(self):
self.MAX_LEVEL = 1
self.WIDTH, HEIGHT = 1024, 768
self.WIDTH, HEIGHT = 1024, 768
self.INNER_RADIUS = 100
self.RING_RADIUS = 60
self.RING_SPACE = 0
self.RINGS_MAX = 4
self.LINE_WIDTH = .5
self.LEG_LINE_WIDTH = 1
self.LABEL_UNTIL_RING = 0
self.hotspots = []
def prepare_layouts(self,ctx):
self.linklayout = ctx.create_layout()
self.linklayout.set_font_description(pango.FontDescription("sans 10"))
def draw_segment(self,ctx, ring, start_angle, end_angle, start_hue, end_hue, data, previouspath=""):
assert isinstance(data, sum_list)
CENTERX, CENTERY = self.WIDTH/2, self.HEIGHT/2
ctx.move_to(CENTERX, CENTERY)
if ring == 0:
self._draw_centered_text(ctx, self._pretty_size(data.the_sum))
n = len(data.data)
i = 0
accumulated = 0
last = start_angle
for fn, d in data.data:
start = last
value = self._list_value(d)
accumulated += value
end = start_angle+(end_angle - start_angle)*1.0*accumulated/data.the_sum
if end-start >= .01:
v = start_hue + (end_hue-start_hue)*1.0*i/n
color = self._choose_color(start_hue + (end_hue-start_hue)*1.0*i/n, ring)
r = self.INNER_RADIUS + ring * (self.RING_RADIUS + self.RING_SPACE)
ctx.move_to(CENTERX+r*cos(start*2*pi), CENTERY+r*sin(start*2*pi))
ctx.arc(CENTERX, CENTERY, r+self.RING_RADIUS, start*2*pi, end*2*pi)
ctx.arc_negative(CENTERX, CENTERY, r, end*2*pi, start*2*pi)
ctx.close_path()
ctx.set_line_width(self.LINE_WIDTH)
ctx.set_source_rgb(*color)
ctx.fill_preserve()
ctx.set_source_rgb(0, 0, 0)
ctx.stroke()
if isinstance(d, sum_list) and ring+1 < self.RINGS_MAX:
self.draw_segment(ctx, ring+1, start, end, v,
start_hue + (end_hue-start_hue)*1.0*(i+1)/n, d,
previouspath+os.sep+fn)
r += self.RING_RADIUS/2
middle = CENTERX+r*cos((start+end)*pi), CENTERY+r*sin((start+end)*pi)
if ring <= 0:
ctx.move_to(*middle)
leg_radius = self.INNER_RADIUS + (self.RINGS_MAX+1) * (self.RING_RADIUS + self.RING_SPACE)
leg_radius -= (self.RING_RADIUS + self.RING_SPACE) / 2
ctx.line_to(CENTERX+leg_radius*cos((start+end)*pi), CENTERY+leg_radius*sin((start+end)*pi))
if cos((start+end)*pi) >= 0:
x = self.WIDTH/2 + leg_radius
align_x = 1
else:
x = self.WIDTH/2 - leg_radius
align_x = 0
# get line target point
y = CENTERY+leg_radius*sin((start+end)*pi)
xmod = 2*(align_x*2-1)
# draw line
ctx.line_to(x, y)
ctx.set_source_rgb(.5, .5, .5)
ctx.set_line_width(self.LEG_LINE_WIDTH)
ctx.stroke()
# write folder name and register a hotspot
ctx.move_to(x+xmod,y)
# register a hotspot ONLY if directory
if isinstance(d, sum_list):
ctx.set_source_rgb(0,0,1)
width,height = self._draw_centered_text(ctx, fn, align_x)
link = previouspath+os.sep+fn
if align_x == 0: width *= -1
self.__register_hotspot(link,x,y+(height/2),x+(width),y-(height/2))
else:
ctx.set_source_rgb(0.5,0.5,0.5)
width,height = self._draw_centered_text(ctx, fn, align_x)
if ring <= self.LABEL_UNTIL_RING:
ctx.move_to(*middle)
ctx.set_source_rgb(0, 0, 0)
# write relative and absolute disk usage
self._draw_centered_text2(ctx, "%.0f%%" % ((end-start)*100), self._pretty_size(value))
last = end
i += 1
def get_hotspot_at(self,x,y):
for h in self.hotspots:
if x >= h.minx and x <= h.maxx and \
y >= h.miny and y <= h.maxy:
return h.folder
def __register_hotspot(self,folder,x0,y0,x1,y1):
if x1 < x0: x0,x1 = x1,x0 # swap
if y1 < y0: y0,y1 = y1,y0
self.hotspots.append(Hotspot( (x0,y0), (x1,y1), folder ))
def hsv2rgb(self,h,s,v):
if s<=0:
return 255*v,255*v,255*v
h=6.0*(h%1.0)
f=h-int(h)
p=int(255*v*(1.0-s))
q=int(255*v*(1.0-(s*f)))
t=int(255*v*(1.0-(s*(1.0-f))))
v=int(255*v)
return ((v,t,p),
(q,v,p),
(p,v,t),
(p,q,v),
(t,p,v),
(v,p,q))[int(h)]
def _list_value(self,l):
if isinstance(l, sum_list):
return l.the_sum
return l
def _pretty_size(self,size):
if size >= 1024*1024*1024:
return "%.1f GiB" % round(size/1024/1024/1024.0)
elif size >= 1024*1024:
return "%.1f MiB" % round(size/1024/1024.0)
elif size >= 1024:
return "%.1f KiB" % round(size/1024.0)
else:
return "%u B" % size
def _choose_color(self,v, ring):
color = self.hsv2rgb(v, .61, 1-ring*0.1)
return color[0]/256.0, color[1]/256.0, color[2]/256.0,
def _draw_centered_text(self,ctx, text, align_x = .5, align_y = .5):
try: text = unicode(text)
except: return
self.linklayout.set_text(text)
width,height = self.linklayout.get_pixel_size()
ctx.rel_move_to(-width*(1-align_x), -height*align_y)
ctx.show_layout(self.linklayout)
return width,height
def _draw_centered_text2(self,ctx, text1, text2):
try:
text1 = unicode(text1)
text2 = unicode(text2)
except: return
extents1 = ctx.text_extents(text1)
extents2 = ctx.text_extents(text2)
h = max((extents1[3], extents2[3]))
p = ctx.get_current_point()
ctx.rel_move_to(-extents1[2]/2, -1)
ctx.show_text(text1)
ctx.move_to(*p)
ctx.rel_move_to(-extents2[2]/2, h+1)
ctx.show_text(text2)
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