TreeView: support selection by shift+arrows/home/end when showCheckBoxesMode='none' (#31279)

Author: pharret31

packages/devextreme/js/__internal/ui/tree_view/tree_view.base.ts

@@ -1971,7 +1971,7 @@ class TreeViewBase extends HierarchicalCollectionWidget<TreeViewBaseProperties,
   }
 
   _moveFocus(location: string, e: DxEvent<KeyboardEvent>): void {
-    const { rtlEnabled } = this.option();
+    const { rtlEnabled, selectByClick } = this.option();
 
     const FOCUS_UP = 'up';
     const FOCUS_DOWN = 'down';
@@ -1993,14 +1993,16 @@ class TreeViewBase extends HierarchicalCollectionWidget<TreeViewBaseProperties,
       return;
     }
 
+    const isSelectionByShiftAllowed = this._showCheckboxes() || selectByClick;
+
     switch (location) {
       case FOCUS_UP: {
         const $prevItem = this._prevItem($items);
         this.option('focusedElement', getPublicElement($prevItem));
 
         const prevItemElement = this._getNodeItemElement($prevItem);
         this.getScrollable().scrollToElement(prevItemElement);
-        if (e.shiftKey && this._showCheckboxes()) {
+        if (e.shiftKey && isSelectionByShiftAllowed) {
           this._updateItemSelection(true, prevItemElement);
         }
         break;
@@ -2011,14 +2013,14 @@ class TreeViewBase extends HierarchicalCollectionWidget<TreeViewBaseProperties,
 
         const nextItemElement = this._getNodeItemElement($nextItem);
         this.getScrollable().scrollToElement(nextItemElement);
-        if (e.shiftKey && this._showCheckboxes()) {
+        if (e.shiftKey && isSelectionByShiftAllowed) {
           this._updateItemSelection(true, nextItemElement);
         }
         break;
       }
       case FOCUS_FIRST: {
         const $firstItem = $items.first();
-        if (e.shiftKey && this._showCheckboxes()) {
+        if (e.shiftKey && isSelectionByShiftAllowed) {
           this._updateSelectionToFirstItem($items, $items.index(this._prevItem($items)));
         }
 
@@ -2029,7 +2031,7 @@ class TreeViewBase extends HierarchicalCollectionWidget<TreeViewBaseProperties,
       case FOCUS_LAST: {
         const $lastItem = $items.last();
 
-        if (e.shiftKey && this._showCheckboxes()) {
+        if (e.shiftKey && isSelectionByShiftAllowed) {
           this._updateSelectionToLastItem($items, $items.index(this._nextItem($items)));
         }