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# LIDT
# Copyright (C) 2016 Karel Kočí
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import math
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Gdk
grid = None
grid_bot = None
step = 50
dia = 300
selectx = None
selecty = None
grid_h = 1
def __grid_draw(wd, cr):
w = wd.get_allocated_width()
h = wd.get_allocated_height()
if w < h:
s = w
else:
s = h
cr.set_source_rgb(0, 0, 0)
h = s / 2 # half of the size of drawing area
global grid_h
grid_h = h
st = (h / dia) * step
cr.rectangle(0, 0, s, s)
cr.fill()
cr.move_to(0, h)
cr.arc(h, h, h, 0, 2 * math.pi)
cr.set_source_rgb(1, 1, 1)
cr.fill()
cr.set_source_rgb(0, 0, 0)
i = 0
while i < h:
cr.move_to(h + i, 0)
cr.line_to(h + i, s)
cr.move_to(h - i, 0)
cr.line_to(h - i, s)
cr.move_to(0, h + i)
cr.line_to(s, h + i)
cr.move_to(0, h - i)
cr.line_to(s, h - i)
i = i + st
cr.set_line_width(1)
cr.stroke()
if selectx is not None:
slx = (h / dia) * selectx
sly = (h / dia) * selecty
cr.move_to(h +slx - 5, h + sly)
cr.arc(h + slx, h + sly, 5, 0, 2 * math.pi)
cr.set_source_rgb(0, 1, 0)
cr.fill()
def __grid_button(widg, button):
global selectx
global selecty
selectx = (button.x - grid_h) * (dia / grid_h)
selecty = (button.y - grid_h) * (dia / grid_h)
selectx = round(selectx / step) * step
selecty = round(selecty / step) * step
grid_bot.set_text(str(selectx) + ':' + str(selecty))
grid.queue_draw()
def test():
grid_render(None, 1, 1)
grid.connect("delete-event", Gtk.main_quit)
Gtk.main()
def grid_render(win, st, di):
global grid
if not grid is None:
grid.destroy()
global step
step = st
global dia
dia = di
global selectx
selectx = None
global selecty
selecty = None
grid = Gtk.Window()
grid.set_title("LIDT: Grid")
grid.set_attached_to(win)
grid.set_destroy_with_parent(True)
box = Gtk.Box(orientation = Gtk.Orientation.VERTICAL)
grid.add(box)
drawarea = Gtk.DrawingArea()
drawarea.set_size_request(512, 512)
drawarea.set_events(drawarea.get_events() | Gdk.EventMask.BUTTON_PRESS_MASK)
drawarea.connect('draw', __grid_draw)
drawarea.connect('button-press-event', __grid_button)
box.pack_start(drawarea, True, True, 0)
global grid_bot
grid_bot = Gtk.Label('')
box.pack_start(grid_bot, False, False, 0)
grid.show_all()
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