Find Visible Region in a Text Widget
April 29, 1999 | Fredrik Lundh
To get the index of the first visible character, use text.index(“@0,0”).
To get the index of the last visible character (the end of the last visible line), use text.index(“@0,%d” % text.winfo_height()).
Example:
from Tkinter import * root = Tk() # create a scrolled text widget frame = Frame(root, bd=2, relief=SUNKEN) scrollbar = Scrollbar(frame, orient=VERTICAL) scrollbar.pack(fill=Y, side=RIGHT) text = Text(frame, bd=0) text.pack() for i in range(1, 1000): text.insert(END, "line %s\n" % i) # attach scrollbar text.config(yscrollcommand=scrollbar.set) scrollbar.config(command=text.yview) frame.pack() label = Label(root) label.pack() def report_position(): # get (beginning of) first visible line top = text.index("@0,0") # get (end of) last visible line bottom = text.index("@0,%d" % text.winfo_height()) # update the label label.config(text="top: %s\nbottom: %s" % (top, bottom)) root.after(100, report_position) # update 10 times a second report_position() mainloop()
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