CODEWITHSUNDEEP
pythonuser-interfacetkinter
lokesh
lokesh

Reputation: 330

how to print tags or id in tkinter used in python

I am using tkinter to generate a gui.

from Tkinter import *
root = Tk()
root.title("explorer")
f=Canvas(root, width=1200, height=768)
f.grid()
main_line = f.create_line(200,300,300,300, tags="main_line_tag", width=5)
mainloop()

in the above sample i want to print tag and id beside the line. how can i do it.

Update

main_line = f.create_line(200,300,300,300, tags="main_line_tag", width=5)
tags_text = ', '.join(f.gettags(main_line))
line_text = "%s: %s" % (main_line, tags_text)
f.create_text(220,320, text=line_text)

solution working but my actual requirement is 

f=Canvas(root, width=1200, height=768)
f.grid()
class Create:
      def __init__(self,xy,t):
          self.xy=self.xy
          self.t=t
          for i in range(1, self.t+1):
              exec 'main_line%d = f.create_line(200,300,300,300, tags="main_line_tag%d")' %(i,i)
    #end of class Create
def update(t,newxy):
    for i in range(1,t+1):
         exec'f.coord(main_line%d, *newxy)'%i
mainloop()

in the above sample code iam trying to update coordinates of the line when i run the code i am getting main_line1 not defined.. even for tags also. how to resolve this.

Thanks

Upvotes: 0

Views: 2524

Answers (1)

A. Rodas
A. Rodas

Reputation: 20679

Just draw a text item, and use the ID and the gettags Canvas method to create your text.

main_line = f.create_line(200,300,300,300, tags="main_line_tag", width=5)
tags_text = ', '.join(f.gettags(main_line))
line_text = "%s: %s" % (main_line, tags_text)
f.create_text(220,320, text=line_text)

Update

The problem with exec 'main_line%d = ... is that you are creating the line, but not storing the reference. However, using exec is a non recommendable solution and there are another ways to do the same as you want with a simple list:

lines = []
def update(t, newxy):
    for line in lines:
        f.coord(line, *newxy)

class Create:
    def __init__(self, xy, t):
        self.xy = xy
        self.t = t
        for i in xrange(self.t):
            new_line = f.create_line(200,300,300,300, tags="main_line_tag%d" % (i+1))
            lines.append(new_line)

Upvotes: 1

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