|
1
19
20 package org.netbeans.paint;
21
22 import java.awt.BasicStroke  ;
23 import java.awt.Color ;
24 import java.awt.Dimension ;
25 import java.awt.Graphics ;
26 import java.awt.Graphics2D ;
27 import java.awt.Paint ;
28 import java.awt.Point ;
29 import java.awt.RenderingHints ;
30 import java.awt.event.MouseEvent ;
31 import java.awt.event.MouseListener ;
32 import java.awt.event.MouseMotionListener ;
33 import java.awt.geom.AffineTransform ;
34 import java.awt.image.BufferedImage ;
35 import javax.swing.JComponent ;
36
37
40 public class PaintCanvas extends JComponent implements MouseListener , MouseMotionListener {
41
42 private int diam = 10;
43 private Paint paint = Color.BLUE;
44 private BufferedImage backingImage;
45 private Point last;
46
47 public PaintCanvas() {
48 addMouseListener(this);
49 addMouseMotionListener(this);
50 setBackground(Color.WHITE);
51 }
52
53 public void setBrush(int diam) {
54 this.diam = diam;
55 }
56
57 public void setDiam(int val) {
58 this.diam = val;
59 }
60
61 public int getDiam() {
62 return diam;
63 }
64
65 public void setPaint(Paint c) {
66 this.paint = c;
67 }
68
69 public Paint getPaint() {
70 return paint;
71 }
72
73 public Color getColor() {
74 if (paint instanceof Color ) {
75 return (Color ) paint;
76 } else {
77 return Color.BLACK;
78 }
79 }
80
81 public void clear() {
82 backingImage = null;
83 repaint();
84 }
85
86 public BufferedImage getImage() {
87 int width = Math.min(getWidth(), 1600);
88 int height = Math.min(getHeight(),1200);
89 if (backingImage == null || backingImage.getWidth() != width || backingImage.getHeight() != height) {
90 BufferedImage old = backingImage;
91 backingImage = new BufferedImage (width, height, BufferedImage.TYPE_INT_ARGB_PRE);
92 Graphics g = backingImage.getGraphics();
93 g.setColor(Color.WHITE);
94 g.fillRect(0, 0, width, height);
95 if (old != null) {
96 ((Graphics2D ) backingImage.getGraphics()).drawRenderedImage(old,
97 AffineTransform.getTranslateInstance(0, 0));
98 }
99 }
100 return backingImage;
101 }
102
103 public void paint(Graphics g) {
104 Graphics2D g2d = (Graphics2D ) g;
105 g2d.drawRenderedImage(getImage(), AffineTransform.getTranslateInstance(0,0));
106 }
107
108 public void mouseClicked(MouseEvent e) {
109 Point p = e.getPoint();
110 Graphics2D g = getImage().createGraphics();
111 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
112 g.setPaint(getPaint());
113 g.setStroke(new BasicStroke (diam, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
114 if (last == null) {
115 last = p;
116 }
117 g.drawLine(last.x, last.y, p.x, p.y);
118 repaint(Math.min(last.x, p.x) - diam / 2 - 1,
119 Math.min(last.y, p.y) - diam / 2 - 1,
120 Math.abs(last.x - p.x) + diam + 2,
121 Math.abs(last.y - p.y) + diam + 2);
122 last = p;
123 }
124
125 public void mousePressed(MouseEvent e) {
126 }
127
128 public void mouseReleased(MouseEvent e) {
129 }
130
131 public void mouseEntered(MouseEvent e) {
132 }
133
134 public void mouseExited(MouseEvent e) {
135 }
136
137 public void mouseDragged(MouseEvent e) {
138 mouseClicked(e);
139 }
140
141 public void mouseMoved(MouseEvent e) {
142 last = null;
143 }
144
145 JComponent createBrushSizeView() {
146 return new BrushSizeView();
147 }
148
149
150 private class BrushSizeView extends JComponent {
151
152 public boolean isOpaque() {
153 return true;
154 }
155
156 public void paint(Graphics g) {
157 ((Graphics2D ) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
158 g.setColor(getBackground());
159 g.fillRect(0,0,getWidth(),getHeight());
160 Point p = new Point (getWidth() / 2, getHeight() / 2);
161 int half = getDiam() / 2;
162 int diam = getDiam();
163 g.setColor(getColor());
164 g.fillOval(p.x - half, p.y - half, diam, diam);
165 }
166
167 public Dimension getPreferredSize() {
168 return new Dimension (32, 32);
169 }
170
171 public Dimension getMinimumSize() {
172 return getPreferredSize();
173 }
174
175 }
176
177 }
178 |
Popular Tags |
Java API By Example, From Geeks To Geeks.