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トップJavaに関する質問jlabelの"Nova Music Player"をグラデーションしたいのです！

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回答編集履歴

3

普通のクラス

2020/08/01 10:29

投稿

TN8001
TN8001

スコア9326

test CHANGED
@@ -217,3 +217,177 @@
217
217
  }
218
218
 
219
219
  ```
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+
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+
222
+
223
+ ---
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+
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+
226
+
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+ 追記 普通のクラス
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+
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+ ```Java
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+
231
+ import java.awt.Color;
232
+
233
+ import java.awt.EventQueue;
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+
235
+ import java.awt.Font;
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+
237
+ import java.awt.FontMetrics;
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+
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+ import java.awt.GradientPaint;
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+
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+ import java.awt.Graphics;
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+
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+ import java.awt.Graphics2D;
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+
245
+ import java.awt.Point;
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+
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+ import java.awt.Rectangle;
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+
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+ import java.awt.SystemColor;
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+
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+ import javax.swing.JFrame;
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+
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+ import javax.swing.JLabel;
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+
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+ import javax.swing.SwingUtilities;
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+
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+
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+
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+
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+
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+ // JFrameを継承してこのアプリ用にカスタマイズしたGUIクラスを作る
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+
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+ public class GUI extends JFrame {
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+
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+ public static void main(String[] args) {
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+
267
+ EventQueue.invokeLater(new Runnable() { // ここも匿名クラスです
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+
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+ public void run() {
270
+
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+ try {
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+
273
+ GUI window = new GUI();
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+
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+ window.setVisible(true);
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+
277
+ } catch (Exception e) {
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+
279
+ e.printStackTrace();
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+
281
+ }
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+
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+ }
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+
285
+ });
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+
287
+ }
288
+
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+
290
+
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+ public GUI() {
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+
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+ // このアプリ専用のいろんなカスタマイズ
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+
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+ setBackground(SystemColor.textHighlight);
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+
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+ setTitle("Nova Music Player");
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+
299
+ setBounds(100, 100, 854, 450);
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+
301
+ setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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+
303
+
304
+
305
+ // GradationLabelはJLabelの機能は当然全部持っているので、JLabel変数に入れても問題ない
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+
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+ JLabel lbl = new GradationLabel("Nova Music Player");
308
+
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+ lbl.setToolTipText("");
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+
311
+ lbl.setForeground(new Color(0, 255, 0));
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+
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+ lbl.setFont(new Font("源界明朝", Font.PLAIN, 80));
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+
315
+ lbl.setBackground(Color.WHITE);
316
+
317
+
318
+
319
+ add(lbl);
320
+
321
+ }
322
+
323
+ }
324
+
325
+
326
+
327
+ // JLabelを継承してグラデーションのテキストを表示するラベルに改造
328
+
329
+ // でもほとんどの機能はJLabelに任せる
330
+
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+ class GradationLabel extends JLabel {
332
+
333
+ public GradationLabel(String text) {
334
+
335
+ super(text);
336
+
337
+ }
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+
339
+
340
+
341
+ // paintComponent（表示するところ）だけをグラデーションするロジックに置き換える
342
+
343
+ @Override
344
+
345
+ public void paintComponent(Graphics g) {
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+
347
+ final Graphics2D g2 = (Graphics2D) g.create();
348
+
349
+ g2.setFont(getFont());
350
+
351
+
352
+
353
+ Rectangle viewR = new Rectangle();
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+
355
+ viewR.width = getSize().width;
356
+
357
+ viewR.height = getSize().height;
358
+
359
+ Rectangle iconR = new Rectangle();
360
+
361
+ Rectangle textR = new Rectangle();
362
+
363
+ SwingUtilities.layoutCompoundLabel(this, g2.getFontMetrics(),
364
+
365
+ getText(), getIcon(),
366
+
367
+ getVerticalAlignment(), getHorizontalAlignment(),
368
+
369
+ getVerticalTextPosition(), getHorizontalTextPosition(),
370
+
371
+ viewR, iconR, textR, getIconTextGap());
372
+
373
+
374
+
375
+ FontMetrics fm = g2.getFontMetrics();
376
+
377
+
378
+
379
+ g2.setPaint(new GradientPaint(new Point(textR.x, textR.y), Color.WHITE,
380
+
381
+ new Point(textR.x, textR.y + textR.height), Color.PINK.darker()));
382
+
383
+
384
+
385
+ g2.drawString(getText(), textR.x, textR.y + fm.getMaxAscent());
386
+
387
+ g2.dispose();
388
+
389
+ }
390
+
391
+ }
392
+
393
+ ```

2

全文

2020/08/01 10:29

投稿

TN8001
TN8001

スコア9326

test CHANGED
@@ -2,70 +2,218 @@
2
2
 
3
3
  ```Java
4
4
 
5
- lblNovaMusicPlayer = new JLabel("Nova Music Player") {
6
-
7
- @Override
8
-
9
- public void paintComponent(Graphics g) {
10
-
11
- final Graphics2D g2 = (Graphics2D) g.create();
12
-
13
- // g2.fillRect(0, 0, getWidth(), getHeight());
14
-
15
- g2.setFont(getFont());
16
-
17
-
18
-
19
- Rectangle viewR = new Rectangle();
20
-
21
- viewR.width = getSize().width;
22
-
23
- viewR.height = getSize().height;
24
-
25
- Rectangle iconR = new Rectangle();
26
-
27
- Rectangle textR = new Rectangle();
28
-
29
- SwingUtilities.layoutCompoundLabel(this, g2.getFontMetrics(),
30
-
31
- getText(), getIcon(),
32
-
33
- getVerticalAlignment(), getHorizontalAlignment(),
34
-
35
- getVerticalTextPosition(), getHorizontalTextPosition(),
36
-
37
- viewR, iconR, textR, getIconTextGap());
38
-
39
-
40
-
41
- FontMetrics fm = g2.getFontMetrics();
42
-
43
-
44
-
45
- // g2.setPaint(new GradientPaint(
46
-
47
- // new Point(0, 0),
48
-
49
- // Color.WHITE,
50
-
51
- // new Point(0, getHeight()),
52
-
53
- // Color.PINK.darker()));
54
-
55
- g2.setPaint(new GradientPaint(new Point(textR.x, textR.y), Color.WHITE,
56
-
57
- new Point(textR.x, textR.y + textR.height), Color.PINK.darker()));
58
-
59
-
60
-
61
- g2.drawString(getText(), textR.x, textR.y + fm.getMaxAscent());
62
-
63
- g2.dispose();
64
-
65
- // super.paintComponent(g);
5
+ package MusicPlayer;
6
+
7
+
8
+
9
+ import java.awt.BorderLayout;
10
+
11
+ import java.awt.Color;
12
+
13
+ import java.awt.EventQueue;
14
+
15
+ import java.awt.Font;
16
+
17
+ import java.awt.FontMetrics;
18
+
19
+ import java.awt.GradientPaint;
20
+
21
+ import java.awt.Graphics;
22
+
23
+ import java.awt.Graphics2D;
24
+
25
+ import java.awt.Point;
26
+
27
+ import java.awt.Rectangle;
28
+
29
+ import java.awt.SystemColor;
30
+
31
+ import javax.swing.JFrame;
32
+
33
+ import javax.swing.JLabel;
34
+
35
+ import javax.swing.JMenu;
36
+
37
+ import javax.swing.JMenuBar;
38
+
39
+ import javax.swing.JMenuItem;
40
+
41
+ import javax.swing.SwingUtilities;
42
+
43
+
44
+
45
+ public class GUI {
46
+
47
+
48
+
49
+ private JFrame frmNovaMusicPlayer;
50
+
51
+ private JLabel lblNovaMusicPlayer;
52
+
53
+ private JMenuBar menuBar;
54
+
55
+ private JMenu menu;
56
+
57
+ private JMenuItem menuItem;
58
+
59
+
60
+
61
+ /**
62
+
63
+ * Launch the application.
64
+
65
+ */
66
+
67
+ public static void main(String[] args) {
68
+
69
+ EventQueue.invokeLater(new Runnable() {
70
+
71
+ public void run() {
72
+
73
+ try {
74
+
75
+ GUI window = new GUI();
76
+
77
+ window.frmNovaMusicPlayer.setVisible(true);
78
+
79
+ } catch (Exception e) {
80
+
81
+ e.printStackTrace();
82
+
83
+ }
84
+
85
+ }
86
+
87
+ });
66
88
 
67
89
  }
68
90
 
91
+
92
+
93
+ /**
94
+
95
+ * Create the application.
96
+
97
+ */
98
+
99
+ public GUI() {
100
+
101
+ initialize();
102
+
103
+ }
104
+
105
+
106
+
107
+ /**
108
+
109
+ * Initialize the contents of the frame.
110
+
111
+ */
112
+
113
+ private void initialize() {
114
+
115
+ frmNovaMusicPlayer = new JFrame();
116
+
117
+ frmNovaMusicPlayer.setBackground(SystemColor.textHighlight);
118
+
119
+ frmNovaMusicPlayer.setTitle("Nova Music Player");
120
+
121
+ frmNovaMusicPlayer.setBounds(100, 100, 854, 450);
122
+
123
+ frmNovaMusicPlayer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
124
+
125
+ frmNovaMusicPlayer.getContentPane().setLayout(new BorderLayout(0, 0));
126
+
127
+
128
+
129
+ menuBar = new JMenuBar();
130
+
131
+ menuBar.setBorderPainted(false);
132
+
133
+ menuBar.setBackground(new Color(255, 255, 255));
134
+
135
+ menuBar.setFont(new Font("Yu Gothic UI", Font.PLAIN, 12));
136
+
137
+ frmNovaMusicPlayer.getContentPane().add(menuBar, BorderLayout.NORTH);
138
+
139
+
140
+
141
+ menu = new JMenu("ファイル");
142
+
143
+ menuBar.add(menu);
144
+
145
+
146
+
147
+ JMenuItem menuItem_1 = new JMenuItem("音楽ファイルを開く");
148
+
149
+ menu.add(menuItem_1);
150
+
151
+
152
+
153
+ lblNovaMusicPlayer = new JLabel("Nova Music Player") {
154
+
155
+ @Override
156
+
157
+ public void paintComponent(Graphics g) {
158
+
159
+ final Graphics2D g2 = (Graphics2D) g.create();
160
+
161
+ g2.setFont(getFont());
162
+
163
+
164
+
165
+ Rectangle viewR = new Rectangle();
166
+
167
+ viewR.width = getSize().width;
168
+
169
+ viewR.height = getSize().height;
170
+
171
+ Rectangle iconR = new Rectangle();
172
+
173
+ Rectangle textR = new Rectangle();
174
+
175
+ SwingUtilities.layoutCompoundLabel(this, g2.getFontMetrics(),
176
+
177
+ getText(), getIcon(),
178
+
179
+ getVerticalAlignment(), getHorizontalAlignment(),
180
+
181
+ getVerticalTextPosition(), getHorizontalTextPosition(),
182
+
183
+ viewR, iconR, textR, getIconTextGap());
184
+
185
+
186
+
187
+ FontMetrics fm = g2.getFontMetrics();
188
+
189
+
190
+
191
+ g2.setPaint(new GradientPaint(new Point(textR.x, textR.y), Color.WHITE,
192
+
193
+ new Point(textR.x, textR.y + textR.height), Color.PINK.darker()));
194
+
195
+
196
+
197
+ g2.drawString(getText(), textR.x, textR.y + fm.getMaxAscent());
198
+
199
+ g2.dispose();
200
+
201
+ }
202
+
69
- };
203
+ };
204
+
205
+ lblNovaMusicPlayer.setToolTipText("");
206
+
207
+ lblNovaMusicPlayer.setForeground(new Color(0, 255, 0));
208
+
209
+ lblNovaMusicPlayer.setFont(new Font("源界明朝", Font.PLAIN, 80));
210
+
211
+ lblNovaMusicPlayer.setBackground(Color.WHITE);
212
+
213
+ frmNovaMusicPlayer.getContentPane().add(lblNovaMusicPlayer);
214
+
215
+ }
216
+
217
+ }
70
218
 
71
219
  ```

1

絶対もっと簡単にできると思う^^;

2020/07/31 16:30

投稿

TN8001
TN8001

スコア9326

test CHANGED
@@ -1,6 +1,4 @@
1
- こういうことですか？
1
+ 絶対もっと簡単にできると思う^^;
2
-
3
-
4
2
 
5
3
  ```Java
6
4
 
@@ -12,23 +10,59 @@
12
10
 
13
11
  final Graphics2D g2 = (Graphics2D) g.create();
14
12
 
15
- g2.setPaint(new GradientPaint(
13
+ // g2.fillRect(0, 0, getWidth(), getHeight());
16
14
 
17
- new Point(0, 0),
15
+ g2.setFont(getFont());
18
16
 
19
- Color.WHITE,
20
17
 
21
- new Point(0, getHeight()),
22
18
 
23
- Color.PINK.darker()));
19
+ Rectangle viewR = new Rectangle();
24
20
 
21
+ viewR.width = getSize().width;
22
+
23
+ viewR.height = getSize().height;
24
+
25
+ Rectangle iconR = new Rectangle();
26
+
27
+ Rectangle textR = new Rectangle();
28
+
29
+ SwingUtilities.layoutCompoundLabel(this, g2.getFontMetrics(),
30
+
31
+ getText(), getIcon(),
32
+
33
+ getVerticalAlignment(), getHorizontalAlignment(),
34
+
35
+ getVerticalTextPosition(), getHorizontalTextPosition(),
36
+
37
+ viewR, iconR, textR, getIconTextGap());
38
+
39
+
40
+
41
+ FontMetrics fm = g2.getFontMetrics();
42
+
43
+
44
+
45
+ // g2.setPaint(new GradientPaint(
46
+
47
+ // new Point(0, 0),
48
+
49
+ // Color.WHITE,
50
+
25
- g2.fillRect(0, 0, getWidth(), getHeight());
51
+ // new Point(0, getHeight()),
52
+
53
+ // Color.PINK.darker()));
54
+
55
+ g2.setPaint(new GradientPaint(new Point(textR.x, textR.y), Color.WHITE,
56
+
57
+ new Point(textR.x, textR.y + textR.height), Color.PINK.darker()));
58
+
59
+
60
+
61
+ g2.drawString(getText(), textR.x, textR.y + fm.getMaxAscent());
26
62
 
27
63
  g2.dispose();
28
64
 
29
-
30
-
31
- super.paintComponent(g);
65
+ // super.paintComponent(g);
32
66
 
33
67
  }
34
68