Demo/tkinter/matt/canvas-reading-tag-info.py

   1 from Tkinter import *
   2
   3
   4 class Test(Frame):
   5     def printit(self):
   6         print "hi"
   7
   8     def createWidgets(self):
   9         self.QUIT = Button(self, text='QUIT', foreground='red',
  10                            command=self.quit)
  11         self.QUIT.pack(side=BOTTOM, fill=BOTH)
  12
  13         self.drawing = Canvas(self, width="5i", height="5i")
  14
  15         # make a shape
  16         pgon = self.drawing.create_polygon(
  17             10, 10, 110, 10, 110, 110, 10 , 110,
  18             fill="red", tags=("weee", "foo", "groo"))
  19
  20         # this is how you query an object for its attributes
  21         # config options FOR CANVAS ITEMS always come back in tuples of length 5.
  22         # 0 attribute name
  23         # 1 BLANK
  24         # 2 BLANK
  25         # 3 default value
  26         # 4 current value
  27         # the blank spots are for consistency with the config command that
  28         # is used for widgets. (remember, this is for ITEMS drawn
  29         # on a canvas widget, not widgets)
  30         option_value = self.drawing.itemconfig(pgon, "stipple")
  31         print "pgon's current stipple value is -->", option_value[4], "<--"
  32         option_value = self.drawing.itemconfig(pgon,  "fill")
  33         print "pgon's current fill value is -->", option_value[4], "<--"
  34         print "  when he is usually colored -->", option_value[3], "<--"
  35
  36         ## here we print out all the tags associated with this object
  37         option_value = self.drawing.itemconfig(pgon,  "tags")
  38         print "pgon's tags are", option_value[4]
  39
  40         self.drawing.pack(side=LEFT)
  41
  42     def __init__(self, master=None):
  43         Frame.__init__(self, master)
  44         Pack.config(self)
  45         self.createWidgets()
  46
  47 test = Test()
  48
  49 test.mainloop()