Kernel: JavaFX tree viewer drag detection implemented.

Issue-Ref: 3921
Issue-Url: https://af3-developer.fortiss.org/issues/3907


Signed-off-by: Florian Hoelzl <hoelzl@fortiss.org>

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings

@@ -2,7 +2,7 @@ DynamicTreeContentProviderBase.java e801da995a1b6e5a1b757247c1638bafb6073e6d GRE
 DynamicTreeItem.java 75dc5534b119ffdb3c10a65810c2a0f330b7955e GREEN
 DynamicTreeTableUIProviderBase.java 7bfc1395283d3dc10026aff5e2e65df88d25f3a7 GREEN
 DynamicTreeTableViewer.java 43757359b3071192ae79710bcbc0e9577bb6f62d GREEN
-DynamicTreeUIProviderBase.java 56fe4df4577b35f1e5e6e4c4be189b706c852d52 GREEN
-DynamicTreeViewer.java 6fc80215348ddb8bb0f79f5b1b66bad1d73adace YELLOW
+DynamicTreeUIProviderBase.java 3f4a9f0e861ce1c8c122feb487388317464752a1 YELLOW
+DynamicTreeViewer.java 933021a9f4cfad90f85cabe3a1be278391851166 YELLOW
 DynamicTreeViewerBase.java 47124c847de322a0ae26eb7a114f85ce4bd02d7e GREEN
 IDoubleClickHandler.java 447f7769dead9a106b3ea3139ef0da51eb0b9a89 GREEN

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeUIProviderBase.java

@@ -15,10 +15,11 @@ package org.fortiss.tooling.common.ui.javafx.control.treetableview;
 
 import javafx.scene.Node;
 import javafx.scene.control.ContextMenu;
+import javafx.scene.input.MouseEvent;
 
 /**
  * This UI provider is responsible to return the label, the icon, and the context menu for each cell
- * in the {@link DynamicTreeViewer} based on the data object.
+ * in the {@link DynamicTreeViewer} based on the data object. It also handles drag start events.
  */
 public abstract class DynamicTreeUIProviderBase<T> {
 	/**
@@ -47,4 +48,14 @@ public abstract class DynamicTreeUIProviderBase<T> {
 	public ContextMenu createContextMenu(T element) {
 		return null;
 	}
+
+	/**
+	 * @param event
+	 *            the mouse event, which caused the drag detection
+	 * @param element
+	 *            the tree element, which was dragged
+	 */
+	public void dragDetected(MouseEvent event, T element) {
+		// ignored
+	}
 }

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeViewer.java

@@ -138,6 +138,9 @@ public final class DynamicTreeViewer<T> extends DynamicTreeViewerBase<T> {
 						this.setEventDispatcher(new DoubleClickEventDispatcher(original));
 						this.setText(uiProvider.getLabel(item));
 						this.setGraphic(uiProvider.getIconNode(item));
+						this.setOnDragDetected(evt -> {
+							uiProvider.dragDetected(evt, item);
+						});
 					} else {
 						this.setText(null);
 						this.setGraphic(null);

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/.ratings

@@ -5,7 +5,7 @@ LibraryViewDragSourceAdapter.java 56ef61b214ef5d6cb5b751791a92158bda0391ec GREEN
 LinkWithEditorPartListener.java c5ab74424378e7b158a805c4dd14fc03c8abeded GREEN
 MarkerViewContentProvider.java 4cb1192baebe21bca951c439c163d0c171512515 GREEN
 MarkerViewPart.java cbb650271b6877af205421b7cb11f930440a7ef9 GREEN
-ModelElementsViewFX.java 395402b845f6ce997ab8dac96a8fc70e715f88ab YELLOW
+ModelElementsViewFX.java f08b6ddb8aab338c3f2a53b899a8189e4e005d63 RED
 NavigatorNewMenu.java a35e391960d1dacbe7f77982e53e1891e9382d5a GREEN
 NavigatorTreeContentComparator.java d9f1354cfdff78b104b28887d2397e5ca0e9755b GREEN
 NavigatorTreeContentProvider.java 1fbe97bebf3805cc1af190cecd784fc1cfd12306 GREEN

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/ModelElementsViewFX.java

@@ -47,6 +47,7 @@ import org.fortiss.tooling.kernel.ui.service.IModelElementHandlerService;
 import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.TextField;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.BorderPane;
 
 /**
@@ -238,6 +239,12 @@ public final class ModelElementsViewFX extends FXViewPart {
 			}
 			return null;
 		}
+
+		/** {@inheritDoc} */
+		@Override
+		public void dragDetected(MouseEvent event, Object element) {
+			System.out.println("Detected drag on " + element.toString());
+		}
 	}
 
 	/** If an editor in a different Project is opened the Model is reinitialized */