chore(*): Recalc and apply new min widths based on paddings.

projects/igniteui-angular/src/lib/grids/columns/column.component.ts

@@ -63,6 +63,7 @@ const DEFAULT_DATE_FORMAT = 'mediumDate';
 const DEFAULT_TIME_FORMAT = 'mediumTime';
 const DEFAULT_DATE_TIME_FORMAT = 'medium';
 const DEFAULT_DIGITS_INFO = '1.0-3';
+const CELL_CONTENT_MIN = 32;
 
 /* blazorElement */
 /* contentParent: ColumnGroup */
@@ -1233,14 +1234,8 @@ export class IgxColumnComponent implements AfterContentInit, OnDestroy, ColumnTy
         if (!this.grid) {
             return '80';
         }
-        switch (this.grid.gridSize) {
-            case Size.Medium:
-                return '64';
-            case Size.Small:
-                return '56';
-            default:
-                return '80';
-        }
+        // the paddings + the min allowed cell content
+        return (this.grid.defaultHeaderGroupMinWidth + CELL_CONTENT_MIN).toString();
     }
     /**
      * Returns a reference to the `summaryTemplate`.

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -3196,7 +3196,7 @@ export abstract class IgxGridBaseDirective implements GridType,
     private overlayIDs = [];
     private _sortingStrategy: IGridSortingStrategy;
     private _pinning: IPinningConfig = { columns: ColumnPinningPosition.Start };
-    private _shouldRecalcRowHeight = false;
+    private _shouldRecalcDefaultSizes = false;
 
     private _hostWidth;
     private _advancedFilteringOverlayId: string;
@@ -3270,6 +3270,7 @@ export abstract class IgxGridBaseDirective implements GridType,
     private _sortDescendingHeaderIconTemplate: TemplateRef<IgxGridHeaderTemplateContext> = null;
     private _gridSize: Size = Size.Large;
     private _defaultRowHeight = 50;
+    private _defaultCellPadding = 48;
 
     /**
      * @hidden @internal
@@ -3688,7 +3689,7 @@ export abstract class IgxGridBaseDirective implements GridType,
                         if (this.shouldResize) {
                             // resizing occurs due to the change of --ig-size css var
                             this._gridSize = this.gridSize;
-                            this.updateDefaultRowHeight();
+                            this.updateDefaultSizes();
                             this._autoSize = this.isPercentHeight && this.calcHeight !== this.getDataBasedBodyHeight();
                             this.crudService.endEdit(false);
                             if (this._summaryRowHeight === 0) {
@@ -3924,7 +3925,7 @@ export abstract class IgxGridBaseDirective implements GridType,
      */
     public dataRebinding(event: IForOfDataChangeEventArgs) {
         if (event.state.chunkSize == 0) {
-            this._shouldRecalcRowHeight = true;
+            this._shouldRecalcDefaultSizes = true;
         }
         this.dataChanging.emit(event);
     }
@@ -3934,9 +3935,9 @@ export abstract class IgxGridBaseDirective implements GridType,
      */
     public dataRebound(event: IForOfDataChangeEventArgs) {
         this.selectionService.clearHeaderCBState();
-        if (this._shouldRecalcRowHeight) {
-            this._shouldRecalcRowHeight = false;
-            this.updateDefaultRowHeight();
+        if (this._shouldRecalcDefaultSizes) {
+            this._shouldRecalcDefaultSizes = false;
+            this.updateDefaultSizes();
         }
         this.dataChanged.emit(event);
     }
@@ -4368,14 +4369,7 @@ export abstract class IgxGridBaseDirective implements GridType,
      * The values below depend on the header cell default right/left padding values.
      */
     public get defaultHeaderGroupMinWidth(): number {
-        switch (this.gridSize) {
-            case Size.Medium:
-                return 32;
-            case Size.Small:
-                return 24;
-            default:
-                return 48;
-        }
+        return this._defaultCellPadding;
     }
 
     /** @hidden @internal */
@@ -7806,13 +7800,15 @@ export abstract class IgxGridBaseDirective implements GridType,
         this._lastSearchInfo.matchCount = this._lastSearchInfo.matchInfoCache.length;
     }
 
-    protected updateDefaultRowHeight() {
+    protected updateDefaultSizes() {
         if (this.dataRowList.length > 0 && this.dataRowList.first.cells && this.dataRowList.first.cells.length > 0) {
             const height = parseFloat(this.document.defaultView.getComputedStyle(this.dataRowList.first.cells.first.nativeElement)?.getPropertyValue('height'));
-            if (height) {
+            const padding = parseFloat(this.document.defaultView.getComputedStyle(this.dataRowList.first.cells.first.nativeElement)?.getPropertyValue('padding-left'));
+            if (height && padding) {
                 this._defaultRowHeight = height;
+                this._defaultCellPadding = padding * 2;
             } else {
-                this._shouldRecalcRowHeight = true;
+                this._shouldRecalcDefaultSizes = true;
             }
         }
     }

projects/igniteui-angular/src/lib/grids/grid/column-resizing.spec.ts

@@ -199,9 +199,10 @@ describe('IgxGrid - Deferred Column Resizing #grid', () => {
             fixture.detectChanges();
 
             expect(column.width).toEqual('80px');
-            setElementSize(grid.nativeElement, Size.Medium)
+            setElementSize(grid.nativeElement, Size.Medium);
             tick(16); // needed because of the throttleTime of the resize obserer
             fixture.detectChanges();
+            (grid as any).updateDefaultSizes();
 
             expect(column.defaultMinWidth).toBe('64');
             UIInteractions.simulateMouseEvent('mousedown', headerResArea, 80, 0);
@@ -214,9 +215,10 @@ describe('IgxGrid - Deferred Column Resizing #grid', () => {
             fixture.detectChanges();
 
             expect(column.width).toEqual('64px');
-            setElementSize(grid.nativeElement, Size.Small)
+            setElementSize(grid.nativeElement, Size.Small);
             tick(16); // needed because of the throttleTime of the resize obserer
             fixture.detectChanges();
+            (grid as any).updateDefaultSizes();
 
             expect(column.defaultMinWidth).toBe('56');
             UIInteractions.simulateMouseEvent('mousedown', headerResArea, 64, 0);

projects/igniteui-angular/src/lib/grids/pivot-grid/pivot-grid.component.ts

@@ -2514,8 +2514,8 @@ export class IgxPivotGridComponent extends IgxGridBaseDirective implements OnIni
             this.theadRow.nativeElement.offsetHeight;
     }
 
-    protected override updateDefaultRowHeight() {
-        super.updateDefaultRowHeight();
+    protected override updateDefaultSizes() {
+        super.updateDefaultSizes();
         if (this.hasHorizontalLayout) {
             // Trigger pipes to recalc heights for the horizontal layout mrl rows.
             this.regroupTrigger++;