Adds overlay helper methods (see #272)

Update bigdataviewer selector

Author: NicoKiaru

pom.xml

@@ -120,7 +120,7 @@
 		<!-- <scijava.app.directory>C:/Users/nicol/Desktop/fiji-win64-bdv-playground/Fiji.app/</scijava.app.directory> -->
 
 		<!-- package version below are not present in the parent pom. A version is needed -->
-		<bigdataviewer-selector.version>0.2.7</bigdataviewer-selector.version>
+		<bigdataviewer-selector.version>0.2.8</bigdataviewer-selector.version>
 		<reflections.version>0.10.2</reflections.version> <!-- for test only -->
 
 		<!-- package version below are determined by the parent pom but need to be upgraded or temporarily fixed for bugs -->
@@ -159,7 +159,6 @@
 		<dependency>
 			<groupId>sc.fiji</groupId>
 			<artifactId>bigvolumeviewer</artifactId>
-			<version>${bigvolumeviewer.version}</version>
 		</dependency>
 
 		<dependency>
@@ -168,21 +167,13 @@
 		</dependency>
 
 		<dependency>
-			<groupId>net.imglib2</groupId>
+			<groupId>net.imglib2</groupId>do overlay helper!!!y
 			<artifactId>imglib2-realtransform</artifactId>
-			<version>${imglib2-realtransform.version}</version>
-		</dependency>
-
-		<dependency>
-			<groupId>sc.fiji</groupId>
-			<artifactId>spim_data</artifactId>
-			<version>${spim_data.version}</version>
 		</dependency>
 
 		<dependency>
 			<groupId>sc.fiji</groupId>
 			<artifactId>bigwarp_fiji</artifactId>
-			<version>${bigwarp_fiji.version}</version>
 		</dependency>
 
 		<!-- Test dependencies -->

src/main/java/sc/fiji/bdvpg/bdv/BdvHandleHelper.java

@@ -36,6 +36,7 @@
 import bdv.util.BdvHandlePanel;
 import bdv.util.BdvOptions;
 import bdv.util.BdvOverlay;
+import bdv.util.BdvOverlaySource;
 import bdv.viewer.Source;
 import net.imglib2.FinalInterval;
 import net.imglib2.FinalRealInterval;
@@ -581,4 +582,37 @@ public static void removeCard(BdvHandle bdvh, Object key) {
 		SwingUtilities.invokeLater(() -> bdvh.getCardPanel().removeCard(key));
 	}
 
+	/**
+	 * Helper function that maintains the number of timepoints of a bdv when addinf an overlay
+	 * see
+	 * @param bdvh
+	 * @param overlay
+	 * @param name
+	 * @return
+	 * @param <T>
+	 */
+	public static <T extends BdvOverlay> BdvOverlaySource<T> addOverlay(BdvHandle bdvh, T overlay, String name) {
+		// Store
+		int nTimepoints = bdvh.getViewerPanel().state().getNumTimepoints();
+		int currentTimePoint = bdvh.getViewerPanel().state().getCurrentTimepoint();
+		BdvOverlaySource<T> bos = BdvFunctions.showOverlay(overlay, name, BdvOptions.options().addTo(bdvh));
+		bdvh.getViewerPanel().state().setNumTimepoints(nTimepoints);
+		bdvh.getViewerPanel().state().setCurrentTimepoint(currentTimePoint);
+		return bos;
+	}
+
+	/**
+	 * Helper function that maintains the number of timepoints of a bdv when removing an overlay
+	 * @param overlay
+	 */
+	public static void removeOverlay(BdvOverlaySource<?> overlay) {
+		// Store
+		BdvHandle bdvh = overlay.getBdvHandle();
+		int nTimepoints = bdvh.getViewerPanel().state().getNumTimepoints();
+		int currentTimePoint = bdvh.getViewerPanel().state().getCurrentTimepoint();
+		overlay.removeFromBdv();
+		bdvh.getViewerPanel().state().setNumTimepoints(nTimepoints);
+		bdvh.getViewerPanel().state().setCurrentTimepoint(currentTimePoint);
+	}
+
 }