Fix Column picker Ctrl+A issue

src/Providers/DataGrid/Wijmo/Features/ColumnPicker.ts

@@ -116,6 +116,7 @@ namespace Providers.DataGrid.Wijmo.Feature {
 		private _configureCheckbox(col: OSFramework.DataGrid.Column.IColumn, item: HTMLElement) {
 			if (col.config.canBeHidden === false) {
 				const checkbox = item.querySelector('input[type="checkbox"]');
+				wijmo.toggleClass(item, 'wj-state-disabled', true);
 				if (checkbox) {
 					checkbox.setAttribute('disabled', 'true');
 				}
@@ -168,6 +169,39 @@ namespace Providers.DataGrid.Wijmo.Feature {
 			);
 		}
 
+		// This code fixes WJM-34234
+		private _issueWorkaround(e) {
+			if (e.ctrlKey && e.code === 'KeyA') {
+				const checkedItems = [...this._theColumnPicker.checkedItems];
+				this._theColumnPicker._children.forEach((item, index) => {
+					const input = item.querySelector('input');
+
+					// If the checkbox item is disabled
+					if ((input && input.disabled) || item.classList.contains('wj-state-disabled')) {
+						const data = this._theColumnPicker.collectionView.items[index];
+						const isVisible = this._grid.getColumn(data.binding).config.visible;
+
+						// Then check if the column must be visible
+						// If it is NOT included in the checked items, let's add to it
+						if (isVisible && !checkedItems.includes(data)) {
+							checkedItems.push(data);
+						}
+						// If the column must NOT be visible
+						// And it is included in the checked items, let's remove it
+						else if (!isVisible && checkedItems.includes(data)) {
+							const indexToRemove = checkedItems.indexOf(data);
+							checkedItems.splice(indexToRemove, 1);
+						}
+					}
+				});
+
+				// Updated the checkedItems array
+				this._theColumnPicker.checkedItems = checkedItems;
+				this._grid.provider.invalidate(true);
+			}
+			e.preventDefault();
+		}
+
 		private _makeColumnPicker(): void {
 			const theGrid = this._grid.provider;
 			const picker = document.createElement('div');
@@ -232,6 +266,9 @@ namespace Providers.DataGrid.Wijmo.Feature {
 
 				e.preventDefault();
 			};
+
+			// This code fixes WJM-34234
+			this._theColumnPicker.hostElement.addEventListener('keydown', this._issueWorkaround.bind(this));
 		}
 
 		public build(): void {