gdk-screen-layout-tester

gdk-screen-layout-tester.py

#!/usr/bin/env python
# Draws the layout of the current GdkScreen.
# CC0 1.0 2014-12-15 Andrew Chadwick, all rights waived
# https://creativecommons.org/publicdomain/zero/1.0/

import logging

from gi.repository import Gtk
from gi.repository import Gdk


APP_NAME = "mypaint-usertest-gdk-screens"

logger = logging.getLogger(APP_NAME)


class Tester (object):

    MARGIN = 20

    def __init__(self):
        super(Tester, self).__init__()
        w = Gtk.Window()
        w.set_title(APP_NAME)
        w.connect("destroy", self._destroy_cb)
        d = Gtk.DrawingArea()
        d.set_size_request(600, 500)
        d.connect("draw", self._draw_cb)
        w.add(d)
        self._main_window = w
        self._drawing_area = d
        screen = d.get_screen()
        screen.connect("size-changed", self._screen_size_changed)
        screen.connect("monitors-changed", self._screen_monitors_changed)

    def run(self):
        self._main_window.show_all()
        Gtk.main()

    def _destroy_cb(self, win):
        Gtk.main_quit()

    def _draw_cb(self, da, cr):
        cr.set_source_rgb(1,1,1)
        cr.paint()
        dw = da.get_allocated_width()
        dh = da.get_allocated_height()
        cr.translate(self.MARGIN, self.MARGIN)
        ew = dw - 2.0*self.MARGIN
        eh = dh - 2.0*self.MARGIN
        cr.translate(ew/2, eh/2)
        screen = da.get_screen()
        sw = screen.get_width()
        sh = screen.get_height()
        scale = min(ew/sw, eh/sh)
        cr.scale(scale, scale)
        cr.translate(-sw/2, -sh/2)
        cr.set_source_rgba(0, 0, 0, 0.05)
        cr.rectangle(0, 0, sw, sh)
        cr.fill()
        mpn = screen.get_primary_monitor()
        for mn in range(screen.get_n_monitors()):
            geom = screen.get_monitor_geometry(mn)
            mx = geom.x
            my = geom.y
            mw = geom.width
            mh = geom.height
            cr.rectangle(mx, my, mw, mh)
            if mn == mpn:
                cr.set_source_rgba(0.8, 0, 0, 0.1)
                cr.fill_preserve()
                cr.set_source_rgb(0.8,0,0)
                cr.set_line_width(5)
                cr.stroke()
            else:
                cr.set_source_rgba(0, 0, 0, 0.05)
                cr.fill_preserve()
                cr.set_source_rgb(0,0,0)
                cr.set_line_width(1)
                cr.stroke()

    def _screen_size_changed(self, *a):
        self._drawing_area.queue_draw()

    def _screen_monitors_changed(self, *a):
        self._drawing_area.queue_draw()


if __name__ == '__main__':
    logging.basicConfig(level=logging.DEBUG)
    app = Tester()
    app.run()