#!/usr/bin/python

import sys
import cairo
import pygtk
pygtk.require('2.0')
import gtk
import gtk.gdk
import pango
import gobject

class CairoView(gtk.Window):
    def __init__(self, family="", slant=0, weight=0, size=18, text="The Quick Brown Fox Jumps Over The Lazy Dog!"):
        gtk.Widget.__init__ (self)

	self.family = family
	if slant == "italic":
	    self.slant = cairo.FONT_SLANT_ITALIC
	elif slant == "oblique":
	    self.slant = cairo.FONT_SLANT_OBLIQUE
	else:
	    self.slant = cairo.FONT_SLANT_NORMAL
	if weight == "bold":
	    self.weight = cairo.FONT_WEIGHT_BOLD
	else:
	    self.weight = cairo.FONT_WEIGHT_NORMAL
	self.size = float (size)
	self.text = text

    def do_realize(self):
        self.set_flags(self.flags() | gtk.REALIZED)

        self.window = gtk.gdk.Window(
            self.get_parent_window(),
            width=self.allocation.width,
            height=self.allocation.height,
            window_type=gtk.gdk.WINDOW_CHILD,
            wclass=gtk.gdk.INPUT_OUTPUT,
            event_mask=self.get_events() | gtk.gdk.EXPOSURE_MASK)

        self.window.set_user_data(self)

        self.style.attach(self.window)

        self.style.set_background(self.window, gtk.STATE_NORMAL)

	self.width, self.height = self.draw ()
        self.window.move_resize(0, 0, self.width, self.height)

    def do_unrealize(self):
        self.window.destroy()

    def do_expose_event(self, event):
    	self.draw (event)

        return False

    def draw(self, event = None):

        cr = self.window.cairo_create()
	if event:
		cr.rectangle(event.area.x, event.area.y,
			     event.area.width, event.area.height)
		cr.clip()

    	cr.set_source_rgb (1, 1, 1)
	cr.paint ()

	cr.select_font_face (self.family, self.slant, self.weight)
	cr.set_font_size (self.size)

	PAD = 30

        extents = cr.text_extents (self.text)
	cr.translate (PAD-extents[0], PAD-extents[1])

	font_extents = cr.font_extents ()
	cr.rectangle (0, -font_extents[0], extents[4], font_extents[2])
	cr.move_to (-PAD, 0)
	cr.line_to (extents[2]+PAD, 0)
	cr.set_source_rgba (1, 0, 0, .7)
	cr.stroke ()

	cr.rectangle (*extents[:4])
	cr.set_source_rgba (0, 1, 0, .7)
	cr.stroke ()

	cr.move_to (0, 0)
        cr.set_source_rgb (0, 0, 0)
        cr.show_text (self.text)

	return int (extents[2]) + 2 * PAD, int (extents[3]) + 2 * PAD

    def run(self):

	self.props.allow_shrink = True
        self.connect("destroy", gtk.main_quit)
        self.show()

        gtk.main()

gobject.type_register(CairoView)

def main(args):

    if len (args) == 1:
	print "usage: cairo-view family [slant [weight [size [text]]]]"
	sys.exit (1)
    cv= CairoView (*args[1:])
    cv.run()

if __name__ == "__main__":
    main(sys.argv)