refactor(combo-common): remove arg from deselect

Author: jackofdiamond5

projects/igniteui-angular/src/lib/combo/combo.common.ts

@@ -55,8 +55,7 @@ export interface IgxComboBase {
     isItemSelected(itemID: any): boolean;
     select(item: any): void;
     select(itemIDs: any[], clearSelection?: boolean, event?: Event): void;
-    deselect(item: any): void;
-    deselect(itemIDs: any[], event?: Event): void;
+    deselect(...args: [] | [itemIDs: any[], event?: Event]): void;
 }
 
 let NEXT_ID = 0;
@@ -1214,8 +1213,7 @@ export abstract class IgxComboBaseDirective extends DisplayDensityBase implement
     public abstract select(newItem: any): void;
     public abstract select(newItems: Array<any> | any, clearCurrentSelection?: boolean, event?: Event): void;
 
-    public abstract deselect(item: any): void;
-    public abstract deselect(items: Array<any>, event?: Event): void;
+    public abstract deselect(...args: [] | [items: Array<any>, event?: Event]): void;
 
     public abstract writeValue(value: any): void;
 

projects/igniteui-angular/src/lib/simple-combo/simple-combo.component.ts

@@ -79,7 +79,7 @@ export class IgxSimpleComboComponent extends IgxComboBaseDirective implements Co
     /** @hidden @internal */
     public composing = false;
 
-    private _updateInput = false;
+    private _updateInput = true;
 
     /** @hidden @internal */
     public get filteredData(): any[] | null {
@@ -121,18 +121,15 @@ export class IgxSimpleComboComponent extends IgxComboBaseDirective implements Co
     }
 
     /**
-     * Deselect a defined item
+     * Deselect the currently selected item
      *
      * @param item the items to be deselected
      * ```typescript
      * this.combo.deselect("New York");
      * ```
      */
-    public deselect(item: any): void {
-        if (item !== null && item !== undefined) {
-            const newSelection = this.selectionService.delete_items(this.id, item instanceof Array ? item : [item]);
-            this.setSelection(newSelection);
-        }
+    public deselect(): void {
+        this.clearSelection();
     }
 
     /** @hidden @internal */
@@ -225,7 +222,7 @@ export class IgxSimpleComboComponent extends IgxComboBaseDirective implements Co
         }
         this.clearSelection(true);
         if (this.collapsed) {
-            this.getEditElement().focus();
+            this.open();
         } else {
             this.focusSearchInput(true);
         }