| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.ui; |
| 17 | |
| 18 | /** |
| 19 | * States of the user interface. This effects which elements are enabled/disabled. |
| 20 | * |
| 21 | * @author Thomas Aglassinger |
| 22 | */ |
| 23 | final class UIStates |
| 24 | { |
| 25 | |
| 26 | /** |
| 27 | * Inidcates that no comic is viewed. |
| 28 | */ |
| 29 | static final String EMPTY = "closed"; |
| 30 | |
| 31 | /** |
| 32 | * Indicates that we are opening (or exporting) a comic. |
| 33 | */ |
| 34 | static final String OPENING = "opening"; |
| 35 | |
| 36 | /** |
| 37 | * Indicates that a comic has been opened, and the user is viewing it. |
| 38 | */ |
| 39 | static final String VIEWING = "viewing"; |
| 40 | |
| 41 | private UIStates() { |
| 42 | super(); |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Is <code>state</code> a valid UIState? |
| 47 | */ |
| 48 | static boolean isValidState(String state) { |
| 49 | assert state != null; |
| 50 | return state.equals(EMPTY) || state.equals(OPENING) || state.equals(VIEWING); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Assert that <code>state</code> a valid UIState. |
| 55 | */ |
| 56 | static void assertValidState(String state) { |
| 57 | assert isValidState(state) : "state=" + state; |
| 58 | } |
| 59 | } |