adds rendering of hierarchy indicator

plugins/com.minres.scviewer.database.ui.swt/src/com/minres/scviewer/database/ui/TrackEntry.java

@@ -11,12 +11,17 @@
 package com.minres.scviewer.database.ui;
 
 
+import java.util.ArrayList;
+import java.util.List;
+
+import com.minres.scviewer.database.EmptyWaveform;
 import com.minres.scviewer.database.IWaveform;
 
 public class TrackEntry {
+	public enum HierState { 
+		NONE, CLOSED, OPENED
+	}
 
-	IWaveformStyleProvider styleProvider;
-	
 	public enum ValueDisplay {
 		DEFAULT, BINARY, SIGNED, UNSIGNED
 
@@ -26,28 +31,45 @@ public class TrackEntry {
 		DEFAULT, STEP_WISE, CONTINOUS
 	}
 
+	IWaveformStyleProvider styleProvider = null;
+
 	final public IWaveform waveform;
 
-	public int vOffset;
+	public int vOffset=0;
 	
-	public int height;
+	public int height=0;
 
-	public boolean selected;
+	public boolean selected=false;
 	
+	public HierState hierState=HierState.NONE;
+
+	public List<TrackEntry> waveforms = new ArrayList<>();
+
 	public String currentValue="";
 	
 	public ValueDisplay valueDisplay = ValueDisplay.DEFAULT;
 	
 	public WaveDisplay waveDisplay = WaveDisplay.DEFAULT;
 	
+	public TrackEntry() {
+		this.waveform = null;
+		this.styleProvider=null;
+	}
+
 	public TrackEntry(IWaveform waveform, IWaveformStyleProvider styleProvider) {
 		this.waveform = waveform;
 		this.styleProvider=styleProvider;
-		vOffset=0;
-		height=0;
-		selected=false;
+		this.hierState = (waveform!=null && waveform.getChildNodes().size()>0)?HierState.CLOSED:HierState.NONE;
 	}
-	
+
+	public TrackEntry(TrackEntry[] waveform, IWaveformStyleProvider styleProvider) {
+		this(new EmptyWaveform(), styleProvider);
+		this.hierState = HierState.CLOSED;
+		for (TrackEntry iWaveform : waveform) {
+			waveforms.add(iWaveform);
+		}
+	}
+
 	@Override
     public boolean equals(Object obj) {
 		if(obj instanceof TrackEntry){
@@ -56,4 +78,5 @@ public class TrackEntry {
 		}
 		return false;
 	}
+	
 }