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daa4106c | 1 | /* |
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2 | * Jexer - Java Text User Interface |
3 | * | |
e16dda65 | 4 | * The MIT License (MIT) |
30d336cc | 5 | * |
e16dda65 | 6 | * Copyright (C) 2016 Kevin Lamonte |
30d336cc | 7 | * |
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8 | * Permission is hereby granted, free of charge, to any person obtaining a |
9 | * copy of this software and associated documentation files (the "Software"), | |
10 | * to deal in the Software without restriction, including without limitation | |
11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
12 | * and/or sell copies of the Software, and to permit persons to whom the | |
13 | * Software is furnished to do so, subject to the following conditions: | |
30d336cc | 14 | * |
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15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
30d336cc | 17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
24 | * DEALINGS IN THE SOFTWARE. | |
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25 | * |
26 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
27 | * @version 1 | |
28 | */ | |
29 | package jexer; | |
30 | ||
31 | import jexer.bits.CellAttributes; | |
32 | import jexer.bits.Color; | |
33 | import jexer.bits.GraphicsChars; | |
34 | import jexer.bits.MnemonicString; | |
35 | import jexer.event.TKeypressEvent; | |
36 | import jexer.event.TMouseEvent; | |
37 | import static jexer.TKeypress.*; | |
38 | ||
39 | /** | |
40 | * TButton implements a simple button. To make the button do something, pass | |
41 | * a TAction class to its constructor. | |
42 | * | |
43 | * @see TAction#DO() | |
44 | */ | |
45 | public final class TButton extends TWidget { | |
46 | ||
47 | /** | |
48 | * The shortcut and button text. | |
49 | */ | |
50 | private MnemonicString mnemonic; | |
51 | ||
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52 | /** |
53 | * Get the mnemonic string for this button. | |
54 | * | |
55 | * @return mnemonic string | |
56 | */ | |
329fd62e | 57 | public MnemonicString getMnemonic() { |
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58 | return mnemonic; |
59 | } | |
60 | ||
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61 | /** |
62 | * Remember mouse state. | |
63 | */ | |
64 | private TMouseEvent mouse; | |
65 | ||
66 | /** | |
67 | * True when the button is being pressed and held down. | |
68 | */ | |
69 | private boolean inButtonPress = false; | |
70 | ||
71 | /** | |
72 | * The action to perform when the button is clicked. | |
73 | */ | |
74 | private TAction action; | |
75 | ||
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76 | /** |
77 | * Act as though the button was pressed. This is useful for other UI | |
78 | * elements to get the same action as if the user clicked the button. | |
79 | */ | |
80 | public void dispatch() { | |
81 | if (action != null) { | |
82 | action.DO(); | |
83 | } | |
84 | } | |
85 | ||
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86 | /** |
87 | * Private constructor. | |
88 | * | |
89 | * @param parent parent widget | |
90 | * @param text label on the button | |
91 | * @param x column relative to parent | |
92 | * @param y row relative to parent | |
93 | */ | |
94 | private TButton(final TWidget parent, final String text, | |
95 | final int x, final int y) { | |
96 | ||
97 | // Set parent and window | |
98 | super(parent); | |
99 | ||
100 | mnemonic = new MnemonicString(text); | |
101 | ||
102 | setX(x); | |
103 | setY(y); | |
104 | setHeight(2); | |
105 | setWidth(mnemonic.getRawLabel().length() + 3); | |
106 | } | |
107 | ||
108 | /** | |
109 | * Public constructor. | |
110 | * | |
111 | * @param parent parent widget | |
112 | * @param text label on the button | |
113 | * @param x column relative to parent | |
114 | * @param y row relative to parent | |
115 | * @param action to call when button is pressed | |
116 | */ | |
117 | public TButton(final TWidget parent, final String text, | |
118 | final int x, final int y, final TAction action) { | |
119 | ||
120 | this(parent, text, x, y); | |
121 | this.action = action; | |
122 | } | |
123 | ||
124 | /** | |
125 | * Returns true if the mouse is currently on the button. | |
126 | * | |
127 | * @return if true the mouse is currently on the button | |
128 | */ | |
129 | private boolean mouseOnButton() { | |
130 | int rightEdge = getWidth() - 1; | |
131 | if (inButtonPress) { | |
132 | rightEdge++; | |
133 | } | |
134 | if ((mouse != null) | |
135 | && (mouse.getY() == 0) | |
136 | && (mouse.getX() >= 0) | |
137 | && (mouse.getX() < rightEdge) | |
138 | ) { | |
139 | return true; | |
140 | } | |
141 | return false; | |
142 | } | |
143 | ||
144 | /** | |
145 | * Draw a button with a shadow. | |
146 | */ | |
147 | @Override | |
148 | public void draw() { | |
149 | CellAttributes buttonColor; | |
150 | CellAttributes menuMnemonicColor; | |
151 | CellAttributes shadowColor = new CellAttributes(); | |
152 | shadowColor.setTo(getWindow().getBackground()); | |
153 | shadowColor.setForeColor(Color.BLACK); | |
154 | shadowColor.setBold(false); | |
155 | ||
7c870d89 | 156 | if (!isEnabled()) { |
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157 | buttonColor = getTheme().getColor("tbutton.disabled"); |
158 | menuMnemonicColor = getTheme().getColor("tbutton.disabled"); | |
7c870d89 | 159 | } else if (isAbsoluteActive()) { |
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160 | buttonColor = getTheme().getColor("tbutton.active"); |
161 | menuMnemonicColor = getTheme().getColor("tbutton.mnemonic.highlighted"); | |
162 | } else { | |
163 | buttonColor = getTheme().getColor("tbutton.inactive"); | |
164 | menuMnemonicColor = getTheme().getColor("tbutton.mnemonic"); | |
165 | } | |
166 | ||
167 | if (inButtonPress) { | |
168 | getScreen().putCharXY(1, 0, ' ', buttonColor); | |
0d47c546 | 169 | getScreen().putStringXY(2, 0, mnemonic.getRawLabel(), buttonColor); |
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170 | getScreen().putCharXY(getWidth() - 1, 0, ' ', buttonColor); |
171 | } else { | |
172 | getScreen().putCharXY(0, 0, ' ', buttonColor); | |
0d47c546 | 173 | getScreen().putStringXY(1, 0, mnemonic.getRawLabel(), buttonColor); |
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174 | getScreen().putCharXY(getWidth() - 2, 0, ' ', buttonColor); |
175 | ||
176 | getScreen().putCharXY(getWidth() - 1, 0, | |
177 | GraphicsChars.CP437[0xDC], shadowColor); | |
178 | getScreen().hLineXY(1, 1, getWidth() - 1, | |
179 | GraphicsChars.CP437[0xDF], shadowColor); | |
180 | } | |
181 | if (mnemonic.getShortcutIdx() >= 0) { | |
182 | if (inButtonPress) { | |
183 | getScreen().putCharXY(2 + mnemonic.getShortcutIdx(), 0, | |
184 | mnemonic.getShortcut(), menuMnemonicColor); | |
185 | } else { | |
186 | getScreen().putCharXY(1 + mnemonic.getShortcutIdx(), 0, | |
187 | mnemonic.getShortcut(), menuMnemonicColor); | |
188 | } | |
189 | ||
190 | } | |
191 | } | |
192 | ||
193 | /** | |
194 | * Handle mouse button presses. | |
195 | * | |
196 | * @param mouse mouse button event | |
197 | */ | |
198 | @Override | |
199 | public void onMouseDown(final TMouseEvent mouse) { | |
200 | this.mouse = mouse; | |
201 | ||
7c870d89 | 202 | if ((mouseOnButton()) && (mouse.isMouse1())) { |
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203 | // Begin button press |
204 | inButtonPress = true; | |
205 | } | |
206 | } | |
207 | ||
208 | /** | |
209 | * Handle mouse button releases. | |
210 | * | |
211 | * @param mouse mouse button release event | |
212 | */ | |
213 | @Override | |
214 | public void onMouseUp(final TMouseEvent mouse) { | |
215 | this.mouse = mouse; | |
216 | ||
7c870d89 | 217 | if (inButtonPress && mouse.isMouse1()) { |
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218 | inButtonPress = false; |
219 | // Dispatch the event | |
220 | if (action != null) { | |
221 | action.DO(); | |
222 | } | |
223 | } | |
224 | ||
225 | } | |
226 | ||
227 | /** | |
228 | * Handle mouse movements. | |
229 | * | |
230 | * @param mouse mouse motion event | |
231 | */ | |
232 | @Override | |
233 | public void onMouseMotion(final TMouseEvent mouse) { | |
234 | this.mouse = mouse; | |
235 | ||
236 | if (!mouseOnButton()) { | |
237 | inButtonPress = false; | |
238 | } | |
239 | } | |
240 | ||
241 | /** | |
242 | * Handle keystrokes. | |
243 | * | |
244 | * @param keypress keystroke event | |
245 | */ | |
246 | @Override | |
247 | public void onKeypress(final TKeypressEvent keypress) { | |
248 | if (keypress.equals(kbEnter) | |
249 | || keypress.equals(kbSpace) | |
250 | ) { | |
251 | // Dispatch | |
252 | if (action != null) { | |
253 | action.DO(); | |
254 | } | |
255 | return; | |
256 | } | |
257 | ||
258 | // Pass to parent for the things we don't care about. | |
259 | super.onKeypress(keypress); | |
260 | } | |
261 | ||
262 | } |