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1 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg 2 # 3 # This file is part of Timeline. 4 # 5 # Timeline is free software: you can redistribute it and/or modify 6 # it under the terms of the GNU General Public License as published by 7 # the Free Software Foundation, either version 3 of the License, or 8 # (at your option) any later version. 9 # 10 # Timeline is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU General Public License for more details. 14 # 15 # You should have received a copy of the GNU General Public License 16 # along with Timeline. If not, see <http://www.gnu.org/licenses/>. 17 18 19 """ 20 A representation of the keyboard and it's control key states. 21 """25 26 CTRL = 4 27 SHIFT = 2 28 ALT = 1 29 NONE = 0 30 35 36 @property 39 40 @property 43 44 @property 47 48 @property5950 """ 51 This function returns a unique integer value for each combination 52 of control keys. It may seem a little odd to use the if statements 53 but that has been proven to be the most efficient way of converting 54 a boolean to an int. 55 """ 56 return ((Keyboard.CTRL if self._ctrl else 0) + 57 (Keyboard.SHIFT if self._shift else 0) + 58 (Keyboard.ALT if self._alt else 0))
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