implement preliminary position display

src/MapAct.scala

@@ -1,18 +1,84 @@
 package de.duenndns.aprsdroid
 
+import _root_.android.graphics.drawable.Drawable
 import _root_.android.os.Bundle
-import _root_.com.google.android.maps.{MapActivity, MapView}
+import _root_.android.util.Log
+import _root_.com.google.android.maps._
 
 class MapAct extends MapActivity {
 	val TAG = "MapAct"
 
 	lazy val mapview = findViewById(R.id.mapview).asInstanceOf[MapView]
+	lazy val pin = this.getResources().getDrawable(R.drawable.cross)
+	lazy val staoverlay = new StationOverlay(pin)
 
 	override def onCreate(savedInstanceState: Bundle) {
 		super.onCreate(savedInstanceState)
 		setContentView(R.layout.mapview)
 		mapview.setBuiltInZoomControls(true)
+		val w = pin.getIntrinsicWidth()
+		val h = pin.getIntrinsicHeight()
+		pin.setBounds(-w/2, -h/2, w/2, h/2)
+		staoverlay.loadDb(StorageDatabase.open(this))
+		mapview.getOverlays().add(staoverlay)
+
 	}
 
 	override def isRouteDisplayed() = false
 }
+
+class Station(point : GeoPoint, call : String, message : String)
+	extends OverlayItem(point, call, message) {
+
+
+}
+
+class StationOverlay(pin : Drawable) extends ItemizedOverlay[Station](pin) {
+
+	//lazy val calls = new scala.collection.mutable.HashMap[String, Boolean]()
+	lazy val stations = new java.util.ArrayList[Station]()
+
+	override def size() = stations.size()
+	override def createItem(idx : Int) : Station = stations.get(idx)
+
+	override def draw(c : Canvas, m : MapView, shadow : Boolean) = {
+		populate()
+		val p = new Point()
+		for (s <- stations) {
+			m.getProjection().toPixels(s, p)
+			c.drawText(s.)
+		}
+	}
+
+	def loadDb(db : StorageDatabase) {
+		val c = db.getPosts("TYPE = 0 OR TYPE = 3", null, "100")
+		c.moveToFirst()
+		while (!c.isAfterLast()) {
+			val msgidx = c.getColumnIndexOrThrow(StorageDatabase.Post.MESSAGE)
+			val message = c.getString(msgidx)
+			addStation(message)
+			c.moveToNext()
+		}
+		c.close()
+		Log.d("StationOverlay", "total %d items".format(size()))
+	}
+
+	def addStation(sta : Station) {
+		//if (calls.contains(sta.getTitle()))
+		//	return
+		//calls.add(sta.getTitle(), true)
+		stations.add(sta)
+		populate()
+	}
+
+	def addStation(post : String) {
+		try {
+			val (call, lat, lon, sym, comment) = AprsPacket.parseReport(post)
+			Log.d("StationOverlay", "got %s(%d, %d)%s -> %s".format(call, lat, lon, sym, comment))
+			addStation(new Station(new GeoPoint(lat, lon), call, comment))
+		} catch {
+		case e : Exception =>
+			Log.d("StationOverlay", "bad " + post)
+		}
+	}
+}