Diagram viewer: disabled grid by default

The grid in the background of diagram editors is disabled by default,
now. This also simplifies some AF3 classes (see respective branch
there).

Issue-ref: 4319
Issue-URL: af3#4319



Signed-off-by: Andreas Bayha <bayha@fortiss.org>

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/.ratings

@@ -2,7 +2,7 @@ DiagramCoordinate.java 6b00aec99054d4cd19003a72bd4e5e774ac6a641 GREEN
 DiagramLayers.java aa1f95dbae290c8b00202abe4385b01b8f36e5ab GREEN
 DiagramViewer.java 73c3c0af460ef0631f4fc8a9d674eb6ebc804ca8 YELLOW
 DiagramViewerDefaultTags.java 6230763252409c60009ab8887b4ef582cf883229 GREEN
-DiagramViewerFeatures.java 3dd78d9c117fc156924a151c6f8d770c53c103bc GREEN
+DiagramViewerFeatures.java 8909375b7116fbd7386eb7d6d8c6f0618a0673ec YELLOW
 DiagramViewerSelection.java e833f592543bc97077907d980a39b123fc4044e6 GREEN
 EDragGesture.java 5cfa098d3877db11981c2750e5e103156d62fc5e GREEN
 FeedbackChange.java b088fa89af648f1674f2f9c1f7f99d585ce801ca GREEN

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/DiagramViewerFeatures.java

@@ -51,7 +51,7 @@ public final class DiagramViewerFeatures {
 	/** The flag for drawing the outer border, which occupies the first grid row and lane. */
 	private boolean drawOuterBorder = true;
 	/** The indicator type. */
-	private IndicatorType indicatorType = IndicatorType.CROSS;
+	private IndicatorType indicatorType = IndicatorType.INVISIBLE;
 	/** The background color. */
 	private Color backgroundColor = LIGHTGRAY;
 	/** The help text for the diagram viewer in-place help */

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/.ratings

@@ -2,7 +2,7 @@ AnchorageContentControllerBase.java da56b10cbf2711b5da69f0b59f43eacbe54f4eea GRE
 ClickControllerBase.java 8e5861ed5f9318008ad0fdd5497ed320cd5bd647 GREEN
 ContentAnchorageMoveControllerBase.java c18e7915ce23e124757f5b736086ecc46694800a GREEN
 ControllerBase.java 9311521b252e46640e26d409610e527fd5ed6922 GREEN
-DefaultDiagramController.java 3f60229b2e0fe0b6ac40c617858cc5a0685a59eb GREEN
+DefaultDiagramController.java f0e8fbcf8201699cd6bf6ea79878d11f9ad62756 YELLOW
 DelegatingContentAnchorageController.java 1889628a346a2183082ffe213978f9d15a949494 GREEN
 DragControllerBase.java b15ff874304f679fe494d85f57cc8cbe4d0d1d15 GREEN
 DraggingUtils.java 95117e2ea4c36b6c6a31f8088bb95b484e0e6612 GREEN

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/DefaultDiagramController.java

@@ -83,11 +83,16 @@ public class DefaultDiagramController extends ControllerBase {
 	private MenuItem createGridMenuItem(DiagramViewerFeatures features) {
 		MenuItem gridMenuItem = null;
 		if(features.getIndicatorType() == IndicatorType.INVISIBLE) {
+			gridMenuItem = new MenuItem("Show Grid");
+
 			if(previousGridIndicatorType != null) {
-				gridMenuItem = new MenuItem("Show Grid");
 				gridMenuItem.setOnAction(evt -> {
 					features.setIndicatorType(previousGridIndicatorType);
 				});
+			} else {
+				gridMenuItem.setOnAction(evt -> {
+					features.setIndicatorType(IndicatorType.CROSS);
+				});
 			}
 		} else {
 			gridMenuItem = new MenuItem("Hide Grid");