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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 | * |
a2018e99 | 6 | * Copyright (C) 2017 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) { | |
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82 | action.DO(); |
83 | inButtonPress = false; | |
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84 | } |
85 | } | |
86 | ||
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87 | /** |
88 | * Private constructor. | |
89 | * | |
90 | * @param parent parent widget | |
91 | * @param text label on the button | |
92 | * @param x column relative to parent | |
93 | * @param y row relative to parent | |
94 | */ | |
95 | private TButton(final TWidget parent, final String text, | |
96 | final int x, final int y) { | |
97 | ||
98 | // Set parent and window | |
99 | super(parent); | |
100 | ||
101 | mnemonic = new MnemonicString(text); | |
102 | ||
103 | setX(x); | |
104 | setY(y); | |
105 | setHeight(2); | |
106 | setWidth(mnemonic.getRawLabel().length() + 3); | |
107 | } | |
108 | ||
109 | /** | |
110 | * Public constructor. | |
111 | * | |
112 | * @param parent parent widget | |
113 | * @param text label on the button | |
114 | * @param x column relative to parent | |
115 | * @param y row relative to parent | |
116 | * @param action to call when button is pressed | |
117 | */ | |
118 | public TButton(final TWidget parent, final String text, | |
119 | final int x, final int y, final TAction action) { | |
120 | ||
121 | this(parent, text, x, y); | |
122 | this.action = action; | |
123 | } | |
124 | ||
125 | /** | |
126 | * Returns true if the mouse is currently on the button. | |
127 | * | |
128 | * @return if true the mouse is currently on the button | |
129 | */ | |
130 | private boolean mouseOnButton() { | |
131 | int rightEdge = getWidth() - 1; | |
132 | if (inButtonPress) { | |
133 | rightEdge++; | |
134 | } | |
135 | if ((mouse != null) | |
136 | && (mouse.getY() == 0) | |
137 | && (mouse.getX() >= 0) | |
138 | && (mouse.getX() < rightEdge) | |
139 | ) { | |
140 | return true; | |
141 | } | |
142 | return false; | |
143 | } | |
144 | ||
145 | /** | |
146 | * Draw a button with a shadow. | |
147 | */ | |
148 | @Override | |
149 | public void draw() { | |
150 | CellAttributes buttonColor; | |
151 | CellAttributes menuMnemonicColor; | |
152 | CellAttributes shadowColor = new CellAttributes(); | |
153 | shadowColor.setTo(getWindow().getBackground()); | |
154 | shadowColor.setForeColor(Color.BLACK); | |
155 | shadowColor.setBold(false); | |
156 | ||
7c870d89 | 157 | if (!isEnabled()) { |
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158 | buttonColor = getTheme().getColor("tbutton.disabled"); |
159 | menuMnemonicColor = getTheme().getColor("tbutton.disabled"); | |
7c870d89 | 160 | } else if (isAbsoluteActive()) { |
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161 | buttonColor = getTheme().getColor("tbutton.active"); |
162 | menuMnemonicColor = getTheme().getColor("tbutton.mnemonic.highlighted"); | |
163 | } else { | |
164 | buttonColor = getTheme().getColor("tbutton.inactive"); | |
165 | menuMnemonicColor = getTheme().getColor("tbutton.mnemonic"); | |
166 | } | |
167 | ||
339652cc | 168 | if (inButtonPress) { |
30d336cc | 169 | getScreen().putCharXY(1, 0, ' ', buttonColor); |
0d47c546 | 170 | getScreen().putStringXY(2, 0, mnemonic.getRawLabel(), buttonColor); |
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171 | getScreen().putCharXY(getWidth() - 1, 0, ' ', buttonColor); |
172 | } else { | |
173 | getScreen().putCharXY(0, 0, ' ', buttonColor); | |
0d47c546 | 174 | getScreen().putStringXY(1, 0, mnemonic.getRawLabel(), buttonColor); |
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175 | getScreen().putCharXY(getWidth() - 2, 0, ' ', buttonColor); |
176 | ||
177 | getScreen().putCharXY(getWidth() - 1, 0, | |
178 | GraphicsChars.CP437[0xDC], shadowColor); | |
179 | getScreen().hLineXY(1, 1, getWidth() - 1, | |
180 | GraphicsChars.CP437[0xDF], shadowColor); | |
181 | } | |
182 | if (mnemonic.getShortcutIdx() >= 0) { | |
339652cc | 183 | if (inButtonPress) { |
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184 | getScreen().putCharXY(2 + mnemonic.getShortcutIdx(), 0, |
185 | mnemonic.getShortcut(), menuMnemonicColor); | |
186 | } else { | |
187 | getScreen().putCharXY(1 + mnemonic.getShortcutIdx(), 0, | |
188 | mnemonic.getShortcut(), menuMnemonicColor); | |
189 | } | |
190 | ||
191 | } | |
192 | } | |
193 | ||
194 | /** | |
195 | * Handle mouse button presses. | |
196 | * | |
197 | * @param mouse mouse button event | |
198 | */ | |
199 | @Override | |
200 | public void onMouseDown(final TMouseEvent mouse) { | |
201 | this.mouse = mouse; | |
202 | ||
7c870d89 | 203 | if ((mouseOnButton()) && (mouse.isMouse1())) { |
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204 | // Begin button press |
205 | inButtonPress = true; | |
206 | } | |
207 | } | |
208 | ||
209 | /** | |
210 | * Handle mouse button releases. | |
211 | * | |
212 | * @param mouse mouse button release event | |
213 | */ | |
214 | @Override | |
215 | public void onMouseUp(final TMouseEvent mouse) { | |
216 | this.mouse = mouse; | |
217 | ||
7c870d89 | 218 | if (inButtonPress && mouse.isMouse1()) { |
30d336cc | 219 | // Dispatch the event |
a325f111 | 220 | dispatch(); |
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221 | } |
222 | ||
223 | } | |
224 | ||
225 | /** | |
226 | * Handle mouse movements. | |
227 | * | |
228 | * @param mouse mouse motion event | |
229 | */ | |
230 | @Override | |
231 | public void onMouseMotion(final TMouseEvent mouse) { | |
232 | this.mouse = mouse; | |
233 | ||
234 | if (!mouseOnButton()) { | |
235 | inButtonPress = false; | |
236 | } | |
237 | } | |
238 | ||
239 | /** | |
240 | * Handle keystrokes. | |
241 | * | |
242 | * @param keypress keystroke event | |
243 | */ | |
244 | @Override | |
245 | public void onKeypress(final TKeypressEvent keypress) { | |
246 | if (keypress.equals(kbEnter) | |
247 | || keypress.equals(kbSpace) | |
248 | ) { | |
249 | // Dispatch | |
a325f111 | 250 | dispatch(); |
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251 | return; |
252 | } | |
253 | ||
254 | // Pass to parent for the things we don't care about. | |
255 | super.onKeypress(keypress); | |
256 | } | |
257 | ||
258 | } |