EXAMPLE: FLASHING CLOCKS in Font

Painting Data Matrix in Font EXAMPLE: FLASHING CLOCKS

Image panelmage = getPaneImage(); setPreferredSize(new Dimension(imageWidth, imageHeight)); } //////////////////////////////////////////////// // Font //////////////////////////////////////////////// private private private private private final final final final final static static static static static String DEFAULT_FONT_NAME = "Lucida Console"; int DEFAULT_TIME_FONT_SIZE = 48; int DEFAULT_DATE_FONT_SIZE = 18; int DEFAULT_SECOND_BLOCK_HEIGHT = 8; int DEFAULT_SECOND_BLOCK_FONT_SIZE = 10;

private Font timeFont = null; private Font dateFont = null; private Font secondFont = null; private Font getFont(Graphics g, int size) { Font font = new Font(DEFAULT_FONT_NAME, Font.PLAIN, size); if (font != null) return font; return g.getFont(); } private Font getTimeFont(Graphics g) { if (timeFont == null) timeFont = getFont(g, DEFAULT_TIME_FONT_SIZE); return timeFont; } private Font getDateFont(Graphics g) { if (dateFont == null) dateFont = getFont(g, DEFAULT_DATE_FONT_SIZE); return dateFont; } private Font getSecondFont(Graphics g) { if (secondFont == null) secondFont = getFont(g, DEFAULT_SECOND_BLOCK_FONT_SIZE); return secondFont; }

//////////////////////////////////////////////// // paint //////////////////////////////////////////////// private void drawClockInfo(Graphics g) { int winWidth = getWidth(); int winHeight = getHeight(); boolean valid = false; try { valid = clockDev.isValidTime(); } catch(RemoteException e) { // valid is already false } if (valid) { g.setColor(Color.BLACK); } else { if (lastBlink == Color.WHITE) { g.setColor(Color.BLACK); lastBlink = Color.BLACK; } else { g.setColor(Color.WHITE); lastBlink = Color.WHITE; } } //// Time String //// Date now = null; try { now = clockDev.getTime(); } catch(RemoteException e) { now = new Date(0); } String timeStr = dateFormat.format(now); Font timeFont = getTimeFont(g); g.setFont(timeFont); FontMetrics timeFontMetric = g.getFontMetrics(); Rectangle2D timeStrBounds = timeFontMetric.getStringBounds(timeStr, g); int int int int int timeStrWidth = (int)timeStrBounds.getWidth(); timeStrHeight = (int)timeStrBounds.getHeight(); timeStrX = (winWidth-timeStrWidth)/2; timeStrY = (winHeight+timeStrHeight)/2; timeStrOffset = timeStrHeight/8/2;

g.drawString( timeStr, timeStrX, timeStrY); //// Date String //// String dateStr = "Time"; Font dateFont = getDateFont(g); g.setFont(dateFont); FontMetrics dateFontMetric = g.getFontMetrics(); Rectangle2D dateStrBounds = dateFontMetric.getStringBounds(dateStr, g); g.drawString( dateStr, (winWidth-(int)dateStrBounds.getWidth())/2, timeStrY-timeStrHeight-timeStrOffset); } private void clear(Graphics g) { g.setColor(Color.GRAY); g.clearRect(0, 0, getWidth(), getHeight()); }

private void drawPanelImage(Graphics g) { if (getPaneImage() == null) { return; } g.drawImage(getPaneImage(), 0, 0, null); } public void paint(Graphics g) { clear(g); drawPanelImage(g); drawClockInfo(g); } }

Here s a clock frame: /** * Copyright (C) Satoshi Konno 2002-2003 * Minor changes Jan Newmarch */ package clock.clock; import clock.device.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ClockFrame extends JFrame implements Runnable, WindowListener { private final static String DEFAULT_TITLE = "Sample Clock"; private ClockDevice clockDev; private ClockPane clockPane; public ClockFrame(ClockDevice clockDev) { this(clockDev, DEFAULT_TITLE); } public ClockFrame(ClockDevice clockDev, String title) { super(title); this.clockDev = clockDev; getContentPane().setLayout(new BorderLayout()); clockPane = new ClockPane(clockDev); getContentPane().add(clockPane, BorderLayout.CENTER); addWindowListener(this); pack(); setVisible(true); } public ClockPane getClockPanel() { return clockPane; } public ClockDevice getClockDevice() { return clockDev; } //////////////////////////////////////////////// // run ////////////////////////////////////////////////

private Thread timerThread = null; public void run() { Thread thisThread = Thread.currentThread(); while (timerThread == thisThread) { // getClockDevice().update(); getClockPanel().repaint(); try { Thread.sleep(1000); } catch(InterruptedException e) {} } } public void start() { // clockDev.start(); timerThread = new Thread(this); timerThread.start(); } public void stop() { // clockDev.stop(); timerThread = null; } //////////////////////////////////////////////// // main //////////////////////////////////////////////// public void windowActivated(WindowEvent e) { } public void windowClosed(WindowEvent e) { } public void windowClosing(WindowEvent e) { stop(); System.exit(0); }

public void windowDeactivated(WindowEvent e) { } public void windowDeiconified(WindowEvent e) { } public void windowIconified(WindowEvent e) { } public void windowOpened(WindowEvent e) { } }

A driver for the ticker timer in the preceding frame is as follows: package clock.clock; import clock.device.*; import clock.service.*; public class TickerClock { public static void main(String args[]) { ClockDevice clockDev = new ClockDevice(); clockDev.setTimer(new TickerTimer()); ClockFrame clock; if (args.length > 0) { clock= new ClockFrame(clockDev, args[0]); } else { clock = new ClockFrame(clockDev); } clock.start(); } } This driver can be run with the following: java clock.clock.TickerClock "Ticking Clock"

A driver for the computer timer in the preceding frame is as follows: package clock.clock; import clock.device.*; import clock.service.*; public class ComputerClock { public static void main(String args[]) { ClockDevice clockDev = new ClockDevice(); clockDev.setTimer(new ComputerTimer()); ClockFrame clock; if (args.length > 0) { clock= new ClockFrame(clockDev, args[0]); } else { clock = new ClockFrame(clockDev); } clock.start(); } } This driver can be run with the following: java clock.clock.ComputerClock "Computer Clock"