plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/tables/mi/RowHighlighter.java

   1 package net.mograsim.plugin.tables.mi;
   2
   3 import java.util.Optional;
   4 import java.util.concurrent.atomic.AtomicBoolean;
   5
   6 import org.eclipse.swt.widgets.Display;
   7 import org.eclipse.swt.widgets.Table;
   8
   9 import net.mograsim.plugin.tables.LazyTableViewer;
  10
  11 public class RowHighlighter
  12 {
  13         private int highlighted = -1, toHighlight;
  14         private LazyTableViewer viewer;
  15         private AtomicBoolean waiting = new AtomicBoolean();
  16         private ColorProvider cProv;
  17
  18         public RowHighlighter(LazyTableViewer viewer, ColorProvider cProv)
  19         {
  20                 this.viewer = viewer;
  21                 this.cProv = cProv;
  22         }
  23
  24         public void highlight(int row)
  25         {
  26                 synchronized (waiting)
  27                 {
  28                         toHighlight = row;
  29                         if (!waiting.get())
  30                         {
  31                                 waiting.set(true);
  32                                 Display.getDefault().asyncExec(() ->
  33                                 {
  34                                         synchronized (waiting)
  35                                         {
  36                                                 waiting.set(false);
  37                                                 if (!viewer.getTable().isDisposed())
  38                                                         innerHighlight(toHighlight);
  39                                         }
  40                                 });
  41                         }
  42                 }
  43         }
  44
  45         private void innerHighlight(int row)
  46         {
  47                 Table table = viewer.getTable();
  48                 cProv.highlight(row);
  49                 if (row != -1)
  50                 {
  51                         table.showItem(table.getItem(Math.min(table.getItemCount(), row + 2)));
  52                         table.showItem(table.getItem(row));
  53                         Optional.of(table.getItem(row).getData()).ifPresent(d -> viewer.update(d, null));
  54                 }
  55                 if (highlighted != -1)
  56                         Optional.of(table.getItem(highlighted).getData()).ifPresent(d -> viewer.update(d, null));
  57                 highlighted = row;
  58         }
  59 }