initial

golnaz.py

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+#!/usr/bin/python
+
+'''
+ZetCode PyCairo tutorial 
+
+This code example draws a circle
+using the PyCairo library.
+
+Author: Jan Bodnar
+Website: zetcode.com 
+Last edited: April 2016
+'''
+
+from gi.repository import Gtk
+import cairo
+import math
+
+
+class Example(Gtk.Window):
+
+    def __init__(self):
+        super(Example, self).__init__()
+        
+        self.init_ui()
+        
+        
+    def init_ui(self):    
+
+        darea = Gtk.DrawingArea()
+        darea.connect("draw", self.on_draw)
+        self.add(darea)
+
+        self.set_title("Fill & stroke")
+        self.resize(3000, 2000)
+        self.set_position(Gtk.WindowPosition.CENTER)
+        self.connect("delete-event", Gtk.main_quit)
+        self.show_all()
+        
+    
+    def on_draw(self, wid, cr):
+        stroke_size = 8
+        line_factor = 1/8
+        iterations = 1000
+        w, h = self.get_size()      
+
+        cr.set_line_width(stroke_size)
+        cr.set_source_rgb(1, 0, 0)
+         
+
+        cr.translate(0, h/2)
+        cr.move_to(0,0)
+        cr.line_to(w,0)
+        cr.stroke() 
+        cr.save()
+        
+
+        #prima linea nera sotto
+        cr.translate(0, stroke_size/2)
+        stroke_size = 1
+        cr.set_line_width(1)
+        cr.set_source_rgb(0, 0, 0)
+        #qui il for delle linee sopra
+        drawLines(cr, w, h,1, iterations)
+        cr.restore()
+        stroke_size =8 
+          #prima linea nera sotto
+        cr.translate(0, -stroke_size/2)
+        stroke_size = 1
+        cr.set_line_width(1)
+        cr.set_source_rgb(0, 0, 0)
+        drawLines(cr, w, h, -1, iterations)
+
+def drawLines(cr,w, h, direction, iterations):
+    print(direction)
+    for l in range(0,iterations):
+        cr.translate(0, direction * 1.05**l)   
+        cr.move_to(0,0)
+        cr.line_to(w,0)
+        cr.stroke() 
+ 
+
+         
+def main():
+    
+    app = Example()
+    Gtk.main()
+        
+        
+if __name__ == "__main__":    
+    main()