#!/usr/bin/env python
# -*- coding: utf-8 -*-
# File: animation.py
#
# Copyright 2021 Vincent Schouten
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# DEALINGS IN THE SOFTWARE.
#
"""
Main code for transforming tkinter canvas items.
.. _Google Python Style Guide:
http://google.github.io/styleguide/pyguide.html
"""
__author__ = '''Vincent Schouten <powermole@protonmail.com>'''
__docformat__ = '''google'''
__date__ = '''28-02-2021'''
__copyright__ = '''Copyright 2021, Vincent Schouten'''
__credits__ = ["Vincent Schouten"]
__license__ = '''MIT'''
__maintainer__ = '''Vincent Schouten'''
__email__ = '''<powermole@protonmail.com>'''
__status__ = '''Development''' # "Prototype", "Development", "Production".
[docs]class AnimateItem:
"""Animates the canvas item by moving horizontally in one direction and loop."""
def __init__(self, main_window, canvas_item):
"""Instantiates the Animate object.
Args:
main_window (MainWindow): An instantiated MainWindow object.
canvas_item (CanvasItem): An instantiated CanvasItem object.
"""
self._status = main_window.main_frame.canvas_frame.canvas_status
self._canvas = main_window.main_frame.canvas_frame.canvas_landscape
self._terminate = False
self._canvas_item = canvas_item
self._canvas_item_width = canvas_item.total_width
self._distance = canvas_item.distance
self._distance_index = 0
# self._scale = 1 # IN DEVELOPMENT
[docs] def start(self):
"""Moves a TCP/IP packet from item to another item and loop."""
self._canvas_item.show()
def _animate_forward():
if not self._terminate:
self._canvas.move(self._canvas_item.item_tag, 10, 0)
self._distance_index += 10
if self._distance_index >= self._distance - self._canvas_item_width:
start_pos = self._distance - self._canvas_item_width
self._canvas.move(self._canvas_item.item_tag, start_pos * -1, 0)
self._distance_index = 0
self._canvas.after(25, _animate_forward)
_animate_forward() # note, the animation will be threaded, so after invoking this method, it continues directly
[docs] def stop(self):
"""Stop moving the TCP/IP packet and cleanup."""
self._terminate = True
self._canvas.delete(self._canvas_item.item_tag)
[docs] def pause(self):
"""Temporarily pause moving the TCP/IP package."""
self._canvas.itemconfig(self._canvas_item.item_tag, state='hidden')
[docs] def resume(self):
"""Resume moving the TCP/IP package."""
self._canvas.itemconfig(self._canvas_item.item_tag, state='normal')