feat: add overlay api methods to show/hide overlays

BBjGridExWidget.bbj

@@ -2455,6 +2455,24 @@ class public BBjGridExWidget extends BBjWidget implements BBjGridExWidgetColumns
             methodret rows!
     methodend
     rem /**
+    rem  * Show loading overlay
+    rem  */
+    method public void showLoadingOverlay()
+        #executeScript("gw_showLoadingOverlay('" + #GRIDID$ + "')")
+    methodend
+    rem /**
+    rem  * Show 'no rows' overlay
+    rem  */
+    method public void showNoRowsOverlay()
+        #executeScript("gw_showNoRowsOverlay('" + #GRIDID$ + "')")
+    methodend
+    rem /**
+    rem  * Clear all overlays
+    rem  */
+    method public void hideOverlay()
+        #executeScript("gw_hideOverlay('" + #GRIDID$ + "')")
+    methodend         
+    rem /**
     rem  * Excute script
     rem  *
     rem  * Excute a javascript code on the client

client/src/api/index.js

@@ -13,5 +13,6 @@ export * from './cells.js';
 export * from './state.js';
 export * from './toolpanel.js';
 export * from './statusbar.js';
+export * from './overlays.js';
 export * from './context.js';
 export * from './jss.js';

client/src/api/overlays.js

@@ -0,0 +1,51 @@
+/*
+* This file is part of the BBjGridExWidget plugin.
+* (c) Basis Europe <eu@basis.com>
+*
+* For the full copyright and license information, please view the LICENSE
+* file that was distributed with this source code.
+*/
+
+import { gw_getGrid } from "./utilities";
+
+/**
+ * Show loading overlay
+ * 
+ * @param {String} id the grid id
+ */
+export function gw_showLoadingOverlay(id) {
+  const grid = gw_getGrid(id);
+
+  if (grid) {
+    const options = gw_getGrid(id).options;
+    options.api.showLoadingOverlay()
+  }
+}
+
+/**
+ * Show 'no rows' overlay
+ * 
+ * @param {String} id the grid id
+ */
+export function gw_showNoRowsOverlay(id) {
+  const grid = gw_getGrid(id);
+
+  if (grid) {
+    const options = gw_getGrid(id).options;
+    options.api.showNoRowsOverlay()
+  }
+}
+
+/**
+ * Clear all overlays
+ * 
+ * @param {String} id the grid id
+ */
+export function gw_hideOverlay(id) {
+  const grid = gw_getGrid(id);
+
+  if (grid) {
+    const options = gw_getGrid(id).options;
+    options.api.hideOverlay()
+  }
+}