mart/ev3/ex1/nl/ru/des/LCDPrinter.java

   1 package nl.ru.des;
   2
   3 import java.util.Deque;
   4 import java.util.Iterator;
   5 import java.util.LinkedList;
   6
   7 import lejos.hardware.lcd.Font;
   8 import lejos.hardware.lcd.GraphicsLCD;
   9 import lejos.utility.Delay;
  10
  11 public class LCDPrinter extends Thread {
  12         public static final int PRINTDELAY = 50;
  13
  14         private static Deque<String> buffer = new LinkedList<String>();
  15
  16         private GraphicsLCD glcd;
  17         private Font font;
  18         private Deque<String> lcdbuffer;
  19         private int charwidth;
  20
  21         public LCDPrinter(GraphicsLCD glcd, Font font) {
  22                 this.glcd = glcd;
  23                 this.font = font;
  24                 glcd.setFont(font);
  25                 lcdbuffer = new LinkedList<String>();
  26                 charwidth = glcd.getWidth()/font.width;
  27                 for(int i = 0; i<glcd.getHeight()/font.height; i++){
  28                         lcdbuffer.add("");
  29                 }
  30         }
  31
  32         public static void print(String s){
  33                 buffer.addLast(s);
  34         }
  35
  36         public void run() {
  37                 Iterator<String> it;
  38                 while (true) {
  39                         if (!buffer.isEmpty()) {
  40                                 String c = buffer.remove();
  41                                 lcdbuffer.removeLast();
  42                                 if(c.length() > charwidth){
  43                                         buffer.addFirst(c.substring(charwidth, c.length()));
  44                                         c = c.substring(0, charwidth);
  45                                 }
  46                                 lcdbuffer.addFirst(c);
  47                                 glcd.clear();
  48                                 it = lcdbuffer.descendingIterator();
  49                                 for(int i = 0; it.hasNext(); i++){
  50                                         glcd.drawString(it.next(), 0, i*font.height, font.getBaselinePosition());
  51                                 }
  52                         }
  53                         Delay.msDelay(PRINTDELAY);
  54                 }
  55         }
  56 }