分享超轻量Swing仪表盘组件（带源码）
来源：互联网 发布：软件 一面 苹果 编辑：程序博客网 时间：2024/05/22 06:41
http://www.iteye.com/topic/1123249
XDoc发布了8.2.5版本，新版本中增加了扩展组件：刻度盘，用于动态图示化展示数据
现在将它封装成一个Swing组件与大家分享，大家可以稍做调整画出更漂亮的仪表盘
import java.awt.BasicStroke;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.Dimension;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.GridLayout;import java.awt.RenderingHints;import java.awt.geom.GeneralPath;import java.awt.geom.Line2D;import java.awt.geom.Rectangle2D;import javax.swing.JComponent;import javax.swing.JFrame;import javax.swing.JPanel;/** * 刻度盘 * @author xdoc */public class Tick extends JComponent { private static final int VALUE_FONT_SIZE = 18; private double from = 0; private double to = 10; private String type = "line"; private double major = 1; private double minor = 0.1; private String value = ""; private String unit = ""; public double getFrom() { return from; } public Tick() { super(); this.setPreferredSize(new Dimension(60, 60)); this.setBackground(Color.WHITE); } public void setFrom(double from) { this.from = from; } public double getMajor() { return major; } public void setMajor(double major) { this.major = major; } public double getMinor() { return minor; } public void setMinor(double minor) { this.minor = minor; } public double getTo() { return to; } public void setTo(double to) { this.to = to; } public String getType() { return type; } /** * 直尺 */ public static final String LINE = "line"; /** * 120度圆环 */ public static final String RING_120 = "ring120"; public static final String RING_180 = "ring180"; public static final String RING_240 = "ring240"; /** * 圆盘 */ public static final String CIRCLE = "circle"; public void setType(String type) { this.type = type; } public String getUnit() { return unit; } public void setUnit(String unit) { this.unit = unit; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } public void paintComponent(Graphics g) { double w = this.getWidth(); double h = this.getHeight(); Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setColor(this.getBackground()); g2.fillRect(0, 0, (int) w, (int) h); g2.setColor(this.getForeground()); g2.setStroke(new BasicStroke(1)); int fontSize = 14; g2.setFont(new Font(Font.SERIF, Font.PLAIN, fontSize)); if (major <= 0) { major = to - from; } if (to > from) { if (type.startsWith("ring") || type.equals("circle")) { double angle; double angleStart; if (type.equals("circle")) { angle = 360; angleStart = Math.PI / 2; } else { angle = toDouble(type.substring(4)); angleStart = (180 + (angle - 180) / 2) / 180 * Math.PI; } double r = angle <= 180 ? Math.min(w / 2, h) : Math.min(w / 2, h / 2); double voff = angle <= 180 ? 0 : r; double dunit = (angle / 180 * Math.PI) / (to - from); for (int i = 0; i <= (to - from) / major; i++) { g2.draw(new Line2D.Double(Math.cos(angleStart - i * major * dunit) * r + w / 2, h - voff - Math.sin(angleStart - i * major * dunit) * r, Math.cos(angleStart - i * major * dunit) * r * 0.75 + w / 2, h - voff - Math.sin(angleStart - i * major * dunit) * r * 0.75)); if (minor > 0 && i < (to - from) / major) { for (int j = 1; j < major / minor; j++) { if (i * major + j * minor < to - from) { g2.draw(new Line2D.Double(Math.cos(angleStart - (i * major + j * minor) * dunit) * r + w / 2, h - voff - Math.sin(angleStart - (i * major + j * minor) * dunit) * r, Math.cos(angleStart - (i * major + j * minor) * dunit) * r * 0.875 + w / 2, h - voff - Math.sin(angleStart - (i * major + j * minor) * dunit) * r * 0.875)); } } } } if (value.length() > 0) { double val = toDouble(value); GeneralPath p = new GeneralPath(); p.moveTo(Math.cos(angleStart - (val - from) * dunit) * r * 0.875 + w / 2, h - voff - Math.sin(angleStart - (val - from) * dunit) * r * 0.875); p.lineTo(Math.cos(angleStart - (val - from) * dunit + Math.PI * 0.5) * 2 + w / 2, h - voff - Math.sin(angleStart - (val - from) * dunit + Math.PI * 0.5) * 2); p.lineTo(Math.cos(angleStart - (val - from) * dunit - Math.PI * 0.5) * 2 + w / 2, h - voff - Math.sin(angleStart - (val - from) * dunit - Math.PI * 0.5) * 2); p.closePath(); g2.fill(p); } } else { if (w > h) { double dunit = w / (to - from); for (int i = 0; i <= (to - from) / major; i++) { g2.draw(new Line2D.Double(i * major * dunit, 0, i * major * dunit, h - fontSize)); if (i < (to - from) / major && minor > 0) { for (int j = 1; j < major / minor; j++) { g2.draw(new Line2D.Double((i * major + j * minor) * dunit, 0, (i * major + j * minor) * dunit, (h - fontSize) / 2)); } } } if (value.length() > 0) { double val = toDouble(value); GeneralPath p = new GeneralPath(); p.moveTo((val - from) * dunit, (h - fontSize) / 2); p.lineTo((val - from) * dunit - 4, h - fontSize); p.lineTo((val - from) * dunit + 4, h - fontSize); p.closePath(); g2.fill(p); } } else { int max = (int) Math.max(getStrBounds(g2, format(from)).getWidth(), getStrBounds(g2, format(to)).getWidth()); double dunit = h / (to - from); for (int i = 0; i <= (to - from) / major; i++) { g2.draw(new Line2D.Double(0, h - i * major * dunit, w - max, h - i * major * dunit)); if (i < (to - from) / major && minor > 0) { for (int j = 1; j < major / minor; j++) { g2.draw(new Line2D.Double(0, h - (i * major + j * minor) * dunit, (w - max) / 2, h - (i * major + j * minor) * dunit)); } } } if (value.length() > 0) { double val = toDouble(value); GeneralPath p = new GeneralPath(); p.moveTo((w - max) / 2, h - (val - from) * dunit); p.lineTo(w - max, h - (val - from) * dunit - 4); p.lineTo(w - max, h - (val - from) * dunit + 4); p.closePath(); g2.fill(p); } } } } if (to > from) { if (major > 0) { if (type.startsWith("ring") || type.equals("circle")) { double angle; double angleStart; if (type.equals("circle")) { angle = 360; angleStart = Math.PI / 2; } else { angle = toDouble(type.substring(4)); angleStart = (180 + (angle - 180) / 2) / 180 * Math.PI; } double r = angle <= 180 ? Math.min(w / 2, h) : Math.min(w / 2, h / 2); double voff = angle <= 180 ? 0 : r; double dunit = (angle / 180 * Math.PI) / (to - from); int xoff = 0; int yoff = 0; double strAngle; for (int i = type.equals("circle") ? 1 : 0; i <= (to - from) / major; i++) { String str; str = format(from + i * major); strAngle = (angleStart - i * major * dunit + Math.PI * 2) % (Math.PI * 2); xoff = 0; yoff = 0; if (strAngle >= 0 && strAngle < Math.PI * 0.25) { xoff = (int) -getStrBounds(g2, str).getWidth(); yoff = fontSize / 2; if (strAngle == 0 && angle == 180) { yoff = 0; } } else if (near(strAngle, Math.PI * 0.5)) { xoff = (int) -getStrBounds(g2, str).getWidth() / 2; yoff = fontSize; } else if (strAngle >= Math.PI * 0.25 && strAngle < Math.PI * 0.5) { xoff = (int) -getStrBounds(g2, str).getWidth(); yoff = fontSize; } else if (strAngle >= Math.PI * 0.5 && strAngle < Math.PI * 0.75) { yoff = fontSize; } else if (strAngle >= Math.PI * 0.75 && strAngle < Math.PI) { yoff = fontSize / 2; } else if (near(strAngle, Math.PI)) { xoff = 1; yoff = fontSize / 2; if (angle == 180) { yoff = 0; } } else if (strAngle >= Math.PI && strAngle < Math.PI * 1.25) { yoff = fontSize / 4; } else if (near(strAngle, Math.PI * 1.5)) { xoff = (int) -getStrBounds(g2, str).getWidth() / 2; } else if (strAngle >= Math.PI * 1.5 && strAngle < Math.PI * 2) { xoff = (int) -getStrBounds(g2, str).getWidth(); } g2.drawString(str, (int) (Math.cos(strAngle) * r * 0.75 + w / 2) + xoff, (int) (h - voff - Math.sin(strAngle) * r * 0.75) + yoff); } g2.setFont(new Font("", Font.BOLD, VALUE_FONT_SIZE)); if (value.length() > 0) { voff = angle <= 180 ? 10 : r - fontSize / 2; drawValue(g2, value + unit, (int) (w / 2 - getStrBounds(g2, value).getWidth() / 2), (int) (h - voff)); } } else { if (w > h) { double dunit = w / (to - from); int off = 0; String str; for (int i = 0; i <= (to - from) / major; i++) { str = format(from + i * major); if (i == 0) { str += unit; off = 0; } else if (i == (to - from) / major) { off = (int) -getStrBounds(g2, str).getWidth(); } else { off = (int) (-getStrBounds(g2, str).getWidth() / 2); } g2.drawString(str, (int) (i * major * dunit) + off, (int) (h - 2)); } if (value.length() > 0) { double val = toDouble(value); value = format(val); if (val == from) { off = 0; } else if (val == to) { off = (int) -getStrBounds(g2, value + unit).getWidth(); } else { off = (int) (-getStrBounds(g2, value + unit).getWidth() / 2); } if ((h - fontSize) / 2 >= fontSize) { drawValue(g2, value + unit, (int) ((val - from) * dunit) + off, (int) ((h - fontSize) / 2)); } else { drawValue(g2, value + unit, (int) ((val - from) * dunit) + off, fontSize); } } } else { double dunit = h / (to - from); int max = (int) Math.max(getStrBounds(g2, format(from)).getWidth(), getStrBounds(g2, format(to)).getWidth()); int off = 0; for (int i = 0; i <= (to - from) / major; i++) { if (i == 0) { off = 0; } else if (i == (to - from) / major) { off = fontSize; } else { off = fontSize / 2; } g2.drawString(format(from + i * major), (int) (w - max + 1), (int) (h - i * major * dunit) + off); } if (unit.length() > 0) { g2.drawString(unit, (int) ((w - max) / 2 + 1), (int) (h - fontSize)); } if (value.length() > 0) { double val = toDouble(value); value = format(val); if (val == 0) { off = 0; } else if (val == to) { off = VALUE_FONT_SIZE; } else { off = VALUE_FONT_SIZE / 2; } drawValue(g2, value + unit, (int) ((w - getStrBounds(g2, value + unit).getWidth()) / 2), (int) (h - (val - from) * dunit + off)); } } } } } } private void drawValue(Graphics2D g2, String value, int x, int y) { g2.setFont(new Font(Font.SERIF, Font.BOLD, VALUE_FONT_SIZE)); g2.drawString(value, x, y); } private String format(double d) { if ((int) d == d) { return String.valueOf((int) d); } else { return String.valueOf(d); } } private double toDouble(String string) { try { return Double.valueOf(string); } catch (Exception e) { return 0; } } private boolean near(double d1, double d2) { return Math.round(d1 * 1000000) == Math.round(d2 * 1000000); } private static Rectangle2D getStrBounds(Graphics2D g, String str) { Font f = g.getFont(); Rectangle2D rect = f.getStringBounds(str, g.getFontRenderContext()); if (rect.getHeight() < f.getSize()) { rect.setFrame(rect.getX(), rect.getY(), rect.getWidth(), f.getSize() + 1); } return rect; } public static void main(String[] args) { try { JFrame f = new JFrame("刻度盘测试"); Container p = f.getContentPane(); Tick tick; tick = new Tick(); tick.setType(Tick.LINE); tick.setValue("3"); tick.setUnit("CM"); p.add(tick, BorderLayout.NORTH); tick = new Tick(); tick.setType(Tick.LINE); p.add(tick, BorderLayout.WEST); JPanel panel = new JPanel(new GridLayout(2, 2)); tick = new Tick(); tick.setForeground(Color.BLUE); tick.setType(Tick.RING_120); tick.setValue("3.5"); tick.setUnit("A"); panel.add(tick); tick = new Tick(); tick.setType(Tick.RING_180); tick.setValue("6"); tick.setUnit("V"); panel.add(tick); tick = new Tick(); tick.setType(Tick.RING_240); tick.setValue("3"); tick.setUnit("Kg"); panel.add(tick); tick = new Tick(); tick.setType(Tick.CIRCLE); tick.setValue("3"); tick.setUnit("Kg"); tick.setBackground(Color.BLACK); tick.setForeground(Color.WHITE); panel.add(tick); p.add(panel, BorderLayout.CENTER); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setSize(640, 480); f.setVisible(true); } catch (Exception e) { e.printStackTrace(); } }}- 分享超轻量Swing仪表盘组件（带源码）
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