bundles/org.simantics.graph.db/src/org/simantics/graph/db/TGStatusMonitor.java

   1 package org.simantics.graph.db;
   2
   3 public interface TGStatusMonitor {
   4
   5     void status(int percentage);
   6     boolean isCanceled();
   7
   8     public static class NullMonitor implements TGStatusMonitor {
   9         @Override
  10         public void status(int percentage) {
  11         }
  12         @Override
  13         public boolean isCanceled() {
  14             return false;
  15         }
  16     }
  17
  18     public static final TGStatusMonitor NULL_MONITOR = new NullMonitor();
  19
  20     public static class Updater {
  21         private final TGStatusMonitor monitor;
  22         private final int total;
  23         private int low;
  24         private int high;
  25         private int current;
  26         private int worked;
  27
  28         public Updater(TGStatusMonitor monitor, int lowPercentage, int highPercentage, int totalWork) {
  29             this.monitor = monitor;
  30             this.low = lowPercentage;
  31             this.high = highPercentage;
  32             this.total = totalWork;
  33         }
  34
  35         public int worked(int work) {
  36             worked += work;
  37             return current = updatePercentage(monitor, low, high, current, worked, total);
  38         }
  39     }
  40
  41     public static int updatePercentage(TGStatusMonitor monitor, int low, int high, int oldPercentage, int done, int total) {
  42         int range = high - low;
  43         int current = low + (range * done) / total;
  44         if (current != oldPercentage) {
  45             oldPercentage = current;
  46             if (monitor != null)
  47                 monitor.status(oldPercentage);
  48         }
  49         return oldPercentage;
  50     }
  51
  52 }