Windows Excel like behavior for grid column filtering

desktop/cmp/grid/impl/filter/headerfilter/values/ValuesTab.scss

@@ -1,4 +1,17 @@
 .xh-values-filter-tab {
+  .store-filter-header {
+    padding: 5px 7px;
+    border-bottom: 1px solid var(--xh-grid-header-border-color);
+    row-gap: 5px;
+    .bp5-control-indicator {
+      font-size: 1em;
+    }
+    span {
+      font-size: var(--xh-grid-compact-header-font-size-px);
+      color: var(--xh-grid-header-text-color);
+    }
+  }
+
   &__hidden-values-message {
     display: flex;
     padding: var(--xh-pad-half-px);

desktop/cmp/grid/impl/filter/headerfilter/values/ValuesTab.ts

@@ -5,10 +5,11 @@
  * Copyright © 2025 Extremely Heavy Industries Inc.
  */
 import {grid} from '@xh/hoist/cmp/grid';
-import {div, placeholder, vframe} from '@xh/hoist/cmp/layout';
+import {div, hframe, placeholder, span, vbox, vframe} from '@xh/hoist/cmp/layout';
 import {storeFilterField} from '@xh/hoist/cmp/store';
 import {hoistCmp, uses} from '@xh/hoist/core';
 import {button} from '@xh/hoist/desktop/cmp/button';
+import {checkbox} from '@xh/hoist/desktop/cmp/input';
 import {panel} from '@xh/hoist/desktop/cmp/panel';
 import {toolbar} from '@xh/hoist/desktop/cmp/toolbar';
 import {Icon} from '@xh/hoist/icon';
@@ -47,7 +48,33 @@ const tbar = hoistCmp.factory(() => {
 const body = hoistCmp.factory<ValuesTabModel>(({model}) => {
     const {isCustomFilter} = model.headerFilterModel;
     if (isCustomFilter) return customFilterPlaceholder();
-    return vframe(grid(), hiddenValuesMessage());
+    return vframe(storeFilterSelect(), grid(), hiddenValuesMessage());
+});
+
+const storeFilterSelect = hoistCmp.factory<ValuesTabModel>(({model}) => {
+    const {gridModel, allVisibleRecsChecked, filterText, headerFilterModel} = model,
+        {store} = gridModel;
+    return vbox({
+        className: 'store-filter-header',
+        items: [
+            hframe(
+                checkbox({
+                    disabled: store.empty,
+                    displayUnsetState: true,
+                    value: allVisibleRecsChecked,
+                    onChange: () => model.toggleAllRecsChecked()
+                }),
+                span(`(Select All${filterText ? ' Search Results' : ''})`)
+            ),
+            hframe({
+                omit: !filterText || store.empty || headerFilterModel.commitOnChange,
+                items: [
+                    checkbox({bind: 'combineCurrentFilters'}),
+                    span(`Add current selection to filter`)
+                ]
+            })
+        ]
+    });
 });
 
 const customFilterPlaceholder = hoistCmp.factory<ValuesTabModel>(({model}) => {

desktop/cmp/grid/impl/filter/headerfilter/values/ValuesTabModel.ts

@@ -10,7 +10,7 @@ import {FieldFilterSpec} from '@xh/hoist/data';
 import {HeaderFilterModel} from '../HeaderFilterModel';
 import {checkbox} from '@xh/hoist/desktop/cmp/input';
 import {action, bindable, computed, makeObservable, observable} from '@xh/hoist/mobx';
-import {castArray, difference, isEmpty, partition, uniq, without} from 'lodash';
+import {castArray, difference, flatten, isEmpty, map, partition, uniq, without} from 'lodash';
 
 export class ValuesTabModel extends HoistModel {
     override xhImpl = true;
@@ -26,6 +26,10 @@ export class ValuesTabModel extends HoistModel {
     /** Bound search term for `StoreFilterField` */
     @bindable filterText: string = null;
 
+    /** Available only when commit on change is false merge
+     * current filter with pendingValues on commit*/
+    @bindable combineCurrentFilters: boolean = false;
+
     /** FieldFilter output by this model. */
     @computed.struct
     get filter(): FieldFilterSpec {
@@ -81,11 +85,18 @@ export class ValuesTabModel extends HoistModel {
         this.headerFilterModel = headerFilterModel;
         this.gridModel = this.createGridModel();
 
-        this.addReaction({
-            track: () => this.pendingValues,
-            run: () => this.syncGrid(),
-            fireImmediately: true
-        });
+        this.addReaction(
+            {
+                track: () => this.pendingValues,
+                run: () => this.syncGrid(),
+                fireImmediately: true
+            },
+            {
+                track: () => [this.filterText, this.combineCurrentFilters],
+                run: () => this.setPendingValues(),
+                debounce: 300
+            }
+        );
     }
 
     syncWithFilter() {
@@ -115,6 +126,23 @@ export class ValuesTabModel extends HoistModel {
     //-------------------
     // Implementation
     //-------------------
+    @action
+    setPendingValues() {
+        if (!this.filterText) {
+            this.doSyncWithFilter();
+            this.syncGrid();
+            return;
+        }
+
+        const {records} = this.gridModel.store,
+            currentFilterValues = flatten(map(this.columnFilters, 'value')),
+            values = map(records, it => it.get('value'));
+
+        this.pendingValues = uniq(
+            this.combineCurrentFilters ? [...currentFilterValues, ...values] : values
+        );
+    }
+
     private getFilter() {
         const {gridFilterModel, pendingValues, values, valueCount, field} = this,
             included = pendingValues.map(it => gridFilterModel.fromDisplayValue(it)),
@@ -217,17 +245,10 @@ export class ValuesTabModel extends HoistModel {
             onRowClicked: ({data: record}) => {
                 this.setRecsChecked(!record.get('isChecked'), record.get('value'));
             },
+            hideHeaders: true,
             columns: [
                 {
                     field: 'isChecked',
-                    headerName: ({gridModel}) => {
-                        return checkbox({
-                            disabled: gridModel.store.empty,
-                            displayUnsetState: true,
-                            value: this.allVisibleRecsChecked,
-                            onChange: () => this.toggleAllRecsChecked()
-                        });
-                    },
                     width: 28,
                     autosizable: false,
                     pinned: true,
@@ -245,7 +266,6 @@ export class ValuesTabModel extends HoistModel {
                 },
                 {
                     field: 'value',
-                    displayName: '(Select All)',
                     align: 'left',
                     comparator: (v1, v2, sortDir, abs, {defaultComparator}) => {
                         const mul = sortDir === 'desc' ? -1 : 1;