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

 1from Tkinter import *
 2
 3
 4class 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
47test = Test()
48
49test.mainloop()