2020-09-29 08:51:34 +02:00
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#!/usr/bin/python
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'''
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ZetCode PyCairo tutorial
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This code example draws a circle
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using the PyCairo library.
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Author: Jan Bodnar
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Website: zetcode.com
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Last edited: April 2016
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'''
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from gi.repository import Gtk
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import cairo
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import math
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2020-09-29 17:57:50 +02:00
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import random
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2020-09-29 08:51:34 +02:00
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class Example(Gtk.Window):
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def __init__(self):
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super(Example, self).__init__()
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self.init_ui()
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def init_ui(self):
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darea = Gtk.DrawingArea()
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darea.connect("draw", self.on_draw)
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self.add(darea)
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self.set_title("Fill & stroke")
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self.resize(3000, 2000)
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self.set_position(Gtk.WindowPosition.CENTER)
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self.connect("delete-event", Gtk.main_quit)
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self.show_all()
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def on_draw(self, wid, cr):
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stroke_size = 8
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line_factor = 1/8
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iterations = 1000
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w, h = self.get_size()
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cr.set_line_width(stroke_size)
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cr.set_source_rgb(1, 0, 0)
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cr.translate(0, h/2)
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cr.move_to(0,0)
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cr.line_to(w,0)
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cr.stroke()
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cr.save()
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2020-09-29 17:57:50 +02:00
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cr.set_source_rgb(0, 0, 0)
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2020-09-29 08:51:34 +02:00
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#prima linea nera sotto
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cr.translate(0, stroke_size/2)
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stroke_size = 1
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cr.set_line_width(1)
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2020-09-29 17:57:50 +02:00
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#qui il for delle linee sopr
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drawBlackArea(cr,w,1,10)
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2020-09-29 08:51:34 +02:00
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drawLines(cr, w, h,1, iterations)
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cr.restore()
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2020-09-29 17:57:50 +02:00
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cr.set_source_rgb(0, 0, 0)
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2020-09-29 08:51:34 +02:00
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stroke_size =8
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#prima linea nera sotto
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cr.translate(0, -stroke_size/2)
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stroke_size = 1
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cr.set_line_width(1)
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2020-09-29 17:57:50 +02:00
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drawBlackArea(cr,w,-1,10)
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2020-09-29 08:51:34 +02:00
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drawLines(cr, w, h, -1, iterations)
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def drawLines(cr,w, h, direction, iterations):
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for l in range(0,iterations):
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cr.translate(0, direction * 1.05**l)
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cr.move_to(0,0)
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2020-09-29 17:57:50 +02:00
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# cr.line_to(w,0)
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drawSegmentedLine(cr,w,l)
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cr.stroke()
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def drawBlackArea(cr,w, direction, iterations):
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for l in range(0,iterations):
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cr.translate(0, direction * 1)
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cr.move_to(0,0)
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2020-09-29 08:51:34 +02:00
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cr.line_to(w,0)
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cr.stroke()
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2020-09-29 17:57:50 +02:00
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def drawSegmentedLine(cr,w,currIt):
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print("segmented line")
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cr.save()
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rv = int(random.uniform(10,30))
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wresiduo=w
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for l in range(rv,0, -1):
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lw = wresiduo/l
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lw = lw + random.uniform(-5,5)
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deltaY = random.uniform(-currIt,currIt)
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cr.move_to(0,0)
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cr.line_to(lw,deltaY)
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cr.stroke()
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2020-09-29 23:49:47 +02:00
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cr.translate(lw,deltaY)
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2020-09-29 17:57:50 +02:00
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#cr.arc(0, 0, 5, 0, 2*math.pi)
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#cr.fill()
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wresiduo=wresiduo-lw
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cr.line_to(wresiduo,0)
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cr.stroke()
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cr.restore()
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2020-09-29 08:51:34 +02:00
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def main():
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app = Example()
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Gtk.main()
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if __name__ == "__main__":
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main()
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