Add Grid.deselectAll() (#18339)

Change-Id: I5d5237fcc06ae184a884cb17fa9b6eee5c37179a

1 files changed, 26 insertions, 0 deletions

diff --git a/client/src/com/vaadin/client/widgets/Grid.java b/client/src/com/vaadin/client/widgets/Grid.java
index e01edcddd7..db7b25720e 100644
--- a/client/src/com/vaadin/client/widgets/Grid.java
+++ b/client/src/com/vaadin/client/widgets/Grid.java
@@ -151,6 +151,7 @@ import com.vaadin.client.widget.grid.selection.SelectionEvent;
 import com.vaadin.client.widget.grid.selection.SelectionHandler;
 import com.vaadin.client.widget.grid.selection.SelectionModel;
 import com.vaadin.client.widget.grid.selection.SelectionModel.Multi;
+import com.vaadin.client.widget.grid.selection.SelectionModel.Single;
 import com.vaadin.client.widget.grid.selection.SelectionModelMulti;
 import com.vaadin.client.widget.grid.selection.SelectionModelNone;
 import com.vaadin.client.widget.grid.selection.SelectionModelSingle;
@@ -7514,6 +7515,31 @@ public class Grid<T> extends ResizeComposite implements
     }
 
     /**
+     * Deselect all rows using the current selection model.
+     * 
+     * @param row
+     *            a row object
+     * @return <code>true</code> iff the current selection changed
+     * @throws IllegalStateException
+     *             if the current selection model is not an instance of
+     *             {@link SelectionModel.Single} or {@link SelectionModel.Multi}
+     */
+    public boolean deselectAll() {
+        if (selectionModel instanceof SelectionModel.Single<?>) {
+            Single<T> single = ((SelectionModel.Single<T>) selectionModel);
+            if (single.getSelectedRow() != null) {
+                return single.deselect(single.getSelectedRow());
+            } else {
+                return false;
+            }
+        } else if (selectionModel instanceof SelectionModel.Multi<?>) {
+            return ((SelectionModel.Multi<T>) selectionModel).deselectAll();
+        } else {
+            throw new IllegalStateException("Unsupported selection model");
+        }
+    }
+
+    /**
      * Gets last selected row from the current SelectionModel.
      * <p>
      * Only selection models implementing {@link SelectionModel.Single} are