Fixed issue 494.

Do not draw new map when it is already drawing and there is only
rotation change.

OsmAnd/src/net/osmand/plus/AsyncLoadingThread.java

@@ -4,22 +4,21 @@ import java.io.File;
 import java.util.List;
 import java.util.Stack;
 
-import org.apache.commons.logging.Log;
-
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Looper;
-
 import net.osmand.Algoritms;
 import net.osmand.LogUtil;
 import net.osmand.ResultMatcher;
 import net.osmand.data.Amenity;
 import net.osmand.data.MapTileDownloader;
-import net.osmand.data.TransportStop;
 import net.osmand.data.MapTileDownloader.DownloadRequest;
 import net.osmand.data.MapTileDownloader.IMapDownloaderCallback;
+import net.osmand.data.TransportStop;
 import net.osmand.map.ITileSource;
 
+import org.apache.commons.logging.Log;
+
+import android.os.Handler;
+import android.os.HandlerThread;
+
 /**
  * Thread to load map objects (POI, transport stops )async
  */

OsmAnd/src/net/osmand/plus/RotatedTileBox.java

@@ -13,6 +13,9 @@ public class RotatedTileBox {
 	private int zoom;
 	private float rotateCos;
 	private float rotateSin;
+	private RectF latLon;
+	private boolean rendering;
+	private RotatedTileBox parent;
 
 	public RotatedTileBox(float leftTileX, float topTileY, float tileWidth, float tileHeight, float rotate, int zoom) {
 		set(leftTileX, topTileY, tileWidth, tileHeight, rotate, zoom);
@@ -20,6 +23,9 @@ public class RotatedTileBox {
 	
 	public RotatedTileBox(RotatedTileBox r){
 		set(r.leftTileX, r.topTileY, r.tileWidth, r.tileHeight, r.rotate, r.zoom);
+		this.latLon = r.latLon;
+		this.rendering = r.rendering;
+		this.parent = r;
 	}
 
 	private void init() {
@@ -166,6 +172,61 @@ public class RotatedTileBox {
 		return calcPointTileY(tileWidth, tileHeight);
 	}
 
-	
+	/**
+	 * the lat lon bounds
+	 * @param latLonBounds
+	 */
+	public void setLatLon(RectF latLonBounds) {
+		//on new latLonBounds reset rendering info and latLonBounds....
+		if (!latLonBounds.equals(this.latLon)) {
+			this.rendering = false;
+			this.latLon = latLonBounds;
+		}
+	}
+
+	/**
+	 * @return true if rendering is in progress
+	 */
+	public boolean isRendering() {
+		return rendering;
+	}
+
+	/**
+	 * Say we are rendering this box
+	 */
+	public void rendering() {
+		rendering = true;
+		if (parent != null) {
+			parent.rendering(latLon);
+		}
+	}
+
+	/**
+	 * Say we are rendering this box for this coordinates
+	 * 
+	 * @param aLatLon
+	 */
+	private void rendering(RectF aLatLon) {
+		if (aLatLon.equals(latLon)) {
+			rendering = true;
+		}
+	}
+
+	/**
+	 * all if rendering was interrupted
+	 */
+	public void renderingInterrupted() {
+		rendered();
+	}
+
+	/**
+	 * Call if rendering is finished
+	 */
+	public void rendered() {
+		rendering = false;
+		if (parent != null) {
+			parent.rendered();
+		}
+	}
 
 }

OsmAnd/src/net/osmand/plus/render/MapRenderRepositories.java

@@ -196,6 +196,9 @@ public class MapRenderRepositories {
 	}
 	
 	public void interruptLoadingMap(){
+		if (requestedBox != null) {
+			requestedBox.renderingInterrupted();
+		}
 		interrupted = true;
 		if(currentRenderingContext != null){
 			currentRenderingContext.interrupted = true;
@@ -207,6 +210,9 @@ public class MapRenderRepositories {
 	
 	private boolean checkWhetherInterrupted(){
 		if(interrupted || (currentRenderingContext != null && currentRenderingContext.interrupted)){
+			if (requestedBox != null) {
+				requestedBox.renderingInterrupted();
+			}
 			requestedBox = bmpLocation;
 			return true;
 		}
@@ -356,6 +362,10 @@ public class MapRenderRepositories {
 			currentRenderingContext = null;
 		}
 		try {
+			// prevent editing
+			requestedBox = new RotatedTileBox(tileRect);
+			requestedBox.rendering();
+			
 			// find selected rendering type
 			OsmandApplication app = ((OsmandApplication)context.getApplicationContext());
 			Boolean renderDay = app.getDaynightHelper().getDayNightRenderer();
@@ -363,9 +373,6 @@ public class MapRenderRepositories {
 			// boolean moreDetail = prefs.SHOW_MORE_MAP_DETAIL.get();
 			BaseOsmandRender renderingType = app.getRendererRegistry().getCurrentSelectedRenderer();
 			
-			// prevent editing
-			requestedBox = new RotatedTileBox(tileRect);
-
 			// calculate data box
 			RectF dataBox = requestedBox.calculateLatLonBox(new RectF());
 			long now = System.currentTimeMillis();
@@ -419,7 +426,6 @@ public class MapRenderRepositories {
 			}
 			
 			
-			
 			renderer.generateNewBitmap(currentRenderingContext, cObjects, bmp, 
 					prefs.USE_ENGLISH_NAMES.get(), renderingType, stepByStep ? notifyList : null);
 			String renderingDebugInfo = currentRenderingContext.renderingDebugInfo;
@@ -468,9 +474,11 @@ public class MapRenderRepositories {
 					Toast.makeText(context, R.string.rendering_out_of_memory, Toast.LENGTH_SHORT).show();
 				}
 			});
-			
+		} finally {
+			if (requestedBox != null) {
+				requestedBox.rendered();
+			}
 		}
-		
 	}
 	
 	public Bitmap getBitmap() {

OsmAnd/src/net/osmand/plus/render/MapVectorLayer.java

@@ -93,10 +93,11 @@ public class MapVectorLayer extends BaseMapLayer {
 			tileLayer.drawTileMap(canvas, tilesRect);
 			resourceManager.getRenderer().interruptLoadingMap();
 		} else {
+			rotatedTileBox.setLatLon(latLonBounds);
 			if (!view.isZooming()) {
 				pixRect.set(0, 0, view.getWidth(), view.getHeight());
 				updateRotatedTileBox();
-				if (resourceManager.updateRenderedMapNeeded(rotatedTileBox)) {
+				if (!rotatedTileBox.isRendering() && resourceManager.updateRenderedMapNeeded(rotatedTileBox)) {
 					// pixRect.set(-view.getWidth(), -view.getHeight() / 2, 2 * view.getWidth(), 3 * view.getHeight() / 2);
 					pixRect.set(-view.getWidth() / 3, -view.getHeight() / 4, 4 * view.getWidth() / 3, 5 * view.getHeight() / 4);
 					updateRotatedTileBox();