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1 package snow.utils.gui;
2
3 import javax.swing.*;
4 import javax.swing.event.*;
5 import javax.imageio.*;
6 import javax.swing.text.*;
7 import javax.swing.text.html.*;
8 import java.io.*;
9 import java.nio.*;
10 import java.awt.*;
11 import java.awt.geom.*;
12 import java.awt.event.*;
13 import java.awt.image.*;
14 import java.util.*;
15
16
18 public class ImageViewerPanel extends JPanel
19 {
20 ImagePanel ip = new ImagePanel();
21 Image im = null;
22 JScrollPane scrollPane = new JScrollPane(ip);
23
24 JPanel controlPanel = new JPanel(new FlowLayout(FlowLayout.LEFT,4,4));
25 JButton zoomPlus = new JButton("+");
26 JButton zoomMinus = new JButton("-");
27 JCheckBox limitToFrameDims = new JCheckBox("Limit to frame size", true);
28
29 double zoomFact = 1;
30 AffineTransform imTr = new AffineTransform(1,0,0,1,0,0);
31
32 private final ComponentAdapter resizeListener;
33
34 public ImageViewerPanel()
35 {
36 super(new BorderLayout());
37 add(scrollPane, BorderLayout.CENTER);
38 add(controlPanel, BorderLayout.NORTH);
39 controlPanel.add(zoomPlus);
40 zoomPlus.setMargin(new Insets(0,2,0,2));
41 zoomPlus.setFocusPainted(false);
42 controlPanel.add(zoomMinus);
43 zoomMinus.setMargin(new Insets(0,3,0,3));
44 zoomMinus.setFocusPainted(false);
45
46 controlPanel.add(limitToFrameDims);
47
48 zoomPlus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae)
49 {
50 zoomFact *= 1.1;
51 update();
52 }});
53
54 zoomMinus.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae)
55 {
56 zoomFact /= 1.1;
57 update();
58 }});
59
60 limitToFrameDims.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ae)
61 {
62 update();
63 }});
64
65
66 resizeListener = new ComponentAdapter()
67 {
68 @Override  public void componentResized(ComponentEvent ce)
69 {
70 if(limitToFrameDims.isSelected())
71 {
72 update();
73 }
74 }
75 };
76 ip.addComponentListener(resizeListener);
77
78 }
80 public void terminate()
81 {
82 ip.removeComponentListener(resizeListener);
83 this.im = null;
84 }
85
86 public JPanel getToolBar() { return controlPanel; }
87
88 public void setImage(Image im)
89 {
90 this.im = im;
91 this.zoomFact = 1.0;
92 update();
93 }
94
95 void update()
96 {
97 if(im!=null)
98 {
99 double imw = im.getWidth(this)+5;
100 double imh = im.getHeight(this)+5;
101 System.out.println(""+scrollPane.getWidth()+" "+this.scrollPane.getPreferredSize().getWidth());
102 System.out.println(""+this.getWidth()+" "+this.getPreferredSize().getWidth());
103
104 if(this.limitToFrameDims.isSelected())
105 {
106 double f = 1;
107
108 double wp = scrollPane.getWidth();
109 if(wp<=0) wp = this.getPreferredSize().getWidth();
110 if(wp < imw) f = wp / imw;
111
112 double hp = scrollPane.getHeight();
113 if(hp<=0) hp = this.getPreferredSize().getHeight();
114 if(hp < imh)
115 {
116 double f2 = hp / imh;
117 if(f2<f) f = f2;
118 }
119 this.zoomFact = f;
120
121 System.out.println("reduce "+zoomFact);
122 }
124 else
125 {
126 }
128
129 Dimension dim = new Dimension((int)(im.getWidth(this)*zoomFact), (int)(im.getHeight(this)*zoomFact));
130 ip.setSize( dim );
131 ip.setPreferredSize( dim );
133
134 }
135 else
136 {
137 ip.setPreferredSize(new Dimension(2,2));
138 }
139 repaint();
140 }
141
142
143 class ImagePanel extends JPanel
144 {
145 public ImagePanel()
146 {
147 super();
148 setBackground(Color.black);
149 }
150
151 @Override public void paintComponent(Graphics g)
152 {
153 super.paintComponent(g);
155 Graphics2D g2 = (Graphics2D) g;
156 imTr.setToScale( zoomFact, zoomFact);
157 g2.transform( imTr );
158 if(im!=null)
159 {
160 double x0 = 0;
161 double y0 = 0;
162 if(im.getWidth(this)*zoomFact < scrollPane.getWidth()) x0 = (scrollPane.getWidth()-im.getWidth(this)*zoomFact )/2.0;
163 if(im.getHeight(this)*zoomFact < scrollPane.getHeight()) y0 = (scrollPane.getHeight()-im.getHeight(this)*zoomFact )/2.0;
164 g.drawImage(im, (int) (x0/zoomFact), (int) (y0/zoomFact), ImageViewerPanel.this);
165 }
166 }
167 }
168
169
170 } |
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