Java實現一種個性化的CheckBox

Java實現一種個性化的CheckBox：

1. package com.han;
3. import java.awt.Dimension;
4. import java.awt.EventQueue;
5. import java.awt.Font;
6. import java.awt.FontMetrics;
7. import java.awt.Graphics;
8. import java.awt.Insets;
9. import java.awt.Rectangle;
10. import java.awt.event.WindowAdapter;
11. import java.awt.event.WindowEvent;
13. import javax.swing.AbstractButton;
14. import javax.swing.ButtonModel;
15. import javax.swing.Icon;
16. import javax.swing.JCheckBox;
17. import javax.swing.JComponent;
18. import javax.swing.JDialog;
19. import javax.swing.SwingUtilities;
20. import javax.swing.plaf.basic.BasicHTML;
21. import javax.swing.plaf.metal.MetalCheckBoxUI;
22. import javax.swing.plaf.metal.MetalLookAndFeel;
23. import javax.swing.text.View;
25. import sun.swing.SwingUtilities2;
27. /**
28. * 實現一種個性化的CheckBox
29. * @author HAN
30. *
31. */
32. public class CheckBoxCustomized extends JDialog {
34. /**
35. *
36. */
37. private static final long serialVersionUID = 5925267340818484608L;
39. /**
40. * Launch the application
41. * @param args
42. */
43. public static void main(String args[]) {
44. EventQueue.invokeLater(new Runnable() {
45. public void run() {
46. try {
47. CheckBoxCustomized dialog = new CheckBoxCustomized();
48. dialog.addWindowListener(new WindowAdapter() {
49. public void windowClosing(WindowEvent e) {
50. System.exit(0);
51. }
52. });
53. dialog.setVisible(true);
54. } catch (Exception e) {
55. e.printStackTrace();
56. }
57. }
58. });
59. }
61. /**
62. * Create the dialog
63. */
64. public CheckBoxCustomized() {
65. super();
66. getContentPane().setLayout(null);
67. setBounds(100, 100, 500, 375);
69. final JCheckBox checkBox = new JCheckBox();
70. checkBox.setText("New JCheckBox");
71. checkBox.setBounds(87, 57, 118, 26);
72. getContentPane().add(checkBox);
73. //
74. MetalCheckBoxUI ui = new MetalCheckBoxUI(){
76. public synchronized void paint(Graphics g, JComponent c) {
78. AbstractButton b = (AbstractButton) c;
79. ButtonModel model = b.getModel();
81. Dimension size = c.getSize();
83. Font f = c.getFont();
84. g.setFont(f);
85. FontMetrics fm = SwingUtilities2.getFontMetrics(c, g, f);
87. Rectangle viewRect = new Rectangle(size);
88. Rectangle iconRect = new Rectangle();
89. Rectangle textRect = new Rectangle();
91. Insets i = c.getInsets();
92. viewRect.x += i.left;
93. viewRect.y += i.top;
94. viewRect.width -= (i.right + viewRect.x);
95. viewRect.height -= (i.bottom + viewRect.y);
97. Icon altIcon = b.getIcon();
99. String text = SwingUtilities.layoutCompoundLabel(
100. c, fm, b.getText(), altIcon != null ? altIcon : getDefaultIcon(),
101. b.getVerticalAlignment(), b.getHorizontalAlignment(),
102. b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
103. viewRect, iconRect, textRect, b.getIconTextGap());
105. // fill background
106. if(c.isOpaque()) {
107. g.setColor(b.getBackground());
108. g.fillRect(0,0, size.width, size.height);
109. }
112. // Paint the radio button
113. if(altIcon != null) {
115. if(!model.isEnabled()) {
116. if(model.isSelected()) {
117. altIcon = b.getDisabledSelectedIcon();
118. } else {
119. altIcon = b.getDisabledIcon();
120. }
121. } else if(model.isPressed() && model.isArmed()) {
122. altIcon = b.getPressedIcon();
123. if(altIcon == null) {
124. // Use selected icon
125. altIcon = b.getSelectedIcon();
126. }
127. } else if(model.isSelected()) {
128. if(b.isRolloverEnabled() && model.isRollover()) {
129. altIcon = b.getRolloverSelectedIcon();
130. if (altIcon == null) {
131. altIcon = b.getSelectedIcon();
132. }
133. } else {
134. altIcon = b.getSelectedIcon();
135. }
136. } else if(b.isRolloverEnabled() && model.isRollover()) {
137. altIcon = b.getRolloverIcon();
138. }
140. if(altIcon == null) {
141. altIcon = b.getIcon();
142. }
144. altIcon.paintIcon(c, g, iconRect.x, iconRect.y);
146. } else {
147. System.out.println("here");
148. // paint the button icon by myself
149. if (model.isEnabled()) {
150. if (model.isPressed() && model.isArmed()) {
151. g.setColor(MetalLookAndFeel.getControlShadow());
152. g.fillRect(iconRect.x, iconRect.y, 13, 13);
153. }
154. g.setColor(c.getForeground());
155. } else {
156. g.setColor(MetalLookAndFeel.getControlShadow());
157. }
159. if (model.isSelected()) {
160. int controlSize = 13;
161. g.fillRect(iconRect.x + 3, iconRect.y + 5, 2,
162. controlSize - 8);
163. g.drawLine(iconRect.x + (controlSize - 4),
164. iconRect.y + 3, iconRect.x + 5, iconRect.y
165. + (controlSize - 6));
166. g.drawLine(iconRect.x + (controlSize - 4),
167. iconRect.y + 4, iconRect.x + 5, iconRect.y
168. + (controlSize - 5));
169. }
170. }
173. // Draw the Text
174. if(text != null) {
175. View v = (View) c.getClientProperty(BasicHTML.propertyKey);
176. if (v != null) {
177. v.paint(g, textRect);
178. } else {
179. int mnemIndex = b.getDisplayedMnemonicIndex();
180. if(model.isEnabled()) {
181. // *** paint the text normally
182. g.setColor(b.getForeground());
183. } else {
184. // *** paint the text disabled
185. g.setColor(getDisabledTextColor());
186. }
187. SwingUtilities2.drawStringUnderlineCharAt(c,g,text,
188. mnemIndex, textRect.x, textRect.y + fm.getAscent());
189. }
190. if(b.hasFocus() && b.isFocusPainted() &&
191. textRect.width > 0 && textRect.height > 0 ) {
192. paintFocus(g,textRect,size);
193. }
194. }
195. }
196. };
198. checkBox.setUI(ui);
199. System.out.println(checkBox.isFocusPainted());
200. checkBox.setFocusPainted(false); // this is optional
201. System.out.println();
202. }
204. }