Demo/tkinter/matt/canvas-with-scrollbars.py

   1 from Tkinter import *
   2
   3 # This example program creates a scroling canvas, and demonstrates
   4 # how to tie scrollbars and canvses together. The mechanism
   5 # is analogus for listboxes and other widgets with
   6 # "xscroll" and "yscroll" configuration options.
   7
   8 class Test(Frame):
   9     def printit(self):
  10         print "hi"
  11
  12     def createWidgets(self):
  13         self.question = Label(self, text="Can Find The BLUE Square??????")
  14         self.question.pack()
  15
  16         self.QUIT = Button(self, text='QUIT', background='red',
  17                            height=3, command=self.quit)
  18         self.QUIT.pack(side=BOTTOM, fill=BOTH)
  19         spacer = Frame(self, height="0.25i")
  20         spacer.pack(side=BOTTOM)
  21
  22         # notice that the scroll region (20" x 20") is larger than
  23         # displayed size of the widget (5" x 5")
  24         self.draw = Canvas(self, width="5i", height="5i",
  25                            background="white",
  26                            scrollregion=(0, 0, "20i", "20i"))
  27
  28         self.draw.scrollX = Scrollbar(self, orient=HORIZONTAL)
  29         self.draw.scrollY = Scrollbar(self, orient=VERTICAL)
  30
  31         # now tie the three together. This is standard boilerplate text
  32         self.draw['xscrollcommand'] = self.draw.scrollX.set
  33         self.draw['yscrollcommand'] = self.draw.scrollY.set
  34         self.draw.scrollX['command'] = self.draw.xview
  35         self.draw.scrollY['command'] = self.draw.yview
  36
  37         # draw something. Note that the first square
  38         # is visible, but you need to scroll to see the second one.
  39         self.draw.create_rectangle(0, 0, "3.5i", "3.5i", fill="black")
  40         self.draw.create_rectangle("10i", "10i", "13.5i", "13.5i", fill="blue")
  41
  42         # pack 'em up
  43         self.draw.scrollX.pack(side=BOTTOM, fill=X)
  44         self.draw.scrollY.pack(side=RIGHT, fill=Y)
  45         self.draw.pack(side=LEFT)
  46
  47
  48     def scrollCanvasX(self, *args):
  49         print "scrolling", args
  50         print self.draw.scrollX.get()
  51
  52
  53     def __init__(self, master=None):
  54         Frame.__init__(self, master)
  55         Pack.config(self)
  56         self.createWidgets()
  57
  58 test = Test()
  59
  60 test.mainloop()