Add observeVisible()

* As replacement for the now deprecated
  SWTObservables.observeVisible()

Issue-Ref: 3569
Issue-Url: https://af3-developer.fortiss.org/issues/3569



Signed-off-by: Simon Barner <barner@fortiss.org>

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/util/.ratings

 ActionUtils.java 4553e487264e3d1f86f4767da4a7400cce4b9a5d GREEN
 ConstraintsUIUtils.java 69d5e08bbf768baf2790380e36f1020ef826a33e GREEN
 CopyPasteUtils.java bbc5cf9c9dc03ebf8dc75d42c919fe6eb60b388e GREEN
-DataBindingUtils.java 3a51d9b5681762dd40751e477aa4862baaed4052 YELLOW
+DataBindingUtils.java 631c47881caa13fc567679a7e4416eb777af0713 YELLOW
 DragAndDropUtils.java 7aab91518aa12d76533a345bf6ed0be9ac7ff0e5 GREEN
 EObjectSelectionUtils.java 128cf8f96c6b9478171dff3deda662d5934f5f44 GREEN
 HierarchicalNameViewerComparator.java 199d82e392d4e437810cc65c0fc521dab52038e0 GREEN

org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/util/DataBindingUtils.java

@@ -234,6 +234,19 @@ public final class DataBindingUtils {
 		return WidgetProperties.selection().observe(widget);
 	}
 
+	/**
+	 * Returns an observable value tracking the visible state of the given
+	 * {@link Control}.
+	 *
+	 * @param control
+	 *            the {@link Control}
+	 * @return an observable value tracking the visible state of the given
+	 *         {@link Control}.
+	 */
+	public static ISWTObservableValue observeVisible(Control control) {
+		return WidgetProperties.visible().observe(control);
+	}
+
 	/**
 	 * Performs a complex binding of a cell editor control to a model element. The
 	 * validation is performed on modification (i.e. always), while model