Re: Need help in GTK3 Draw event

[cecashon aol com]

Hi Dhrubajyoti,

The textview widget has text tags built in that you can use to draw rectangles around text. If you want to 
draw a rectangle to block out text you can match the background and foreground colors. This code works on 
Ubuntu16.04, GTK3.18 and Python2.7. Give it a try and see if something similar will work for what you are 
working on.

Eric

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

class TextBox(Gtk.TextView):
    def __init__(self):
        Gtk.TextView.__init__(self)
        textbuffer = self.get_buffer() 
        textbuffer.set_text("Some text to tag.\nAnother line to tag.")
        start = textbuffer.get_start_iter()
        end = textbuffer.get_end_iter()
        tag = textbuffer.create_tag("blue_tag", background="blue", foreground="yellow")
        textbuffer.apply_tag(tag, start, end)
           
class MainWindow(Gtk.Window):
    def __init__(self):
        Gtk.Window.__init__(self, title="Text Tag")
        self.set_default_size(300, 100)
        self.tb = TextBox()
        self.tb.set_hexpand(True)
        self.tb.set_vexpand(True)
        self.grid = Gtk.Grid()
        self.grid.attach(self.tb, 0, 0, 1, 1)
        self.add(self.grid)

win = MainWindow()
win.connect("delete-event", Gtk.main_quit) 
win.show_all()
Gtk.main()