Your first custom menu item

Now that we have our map up and running, let's add some interactivity.

We can do this with a Menu Item! But what is a menu item?

Menu items exist inside the Context Menu, which can be opened by right clicking on a widget.

Clicking on a menu item performs a predetermined action.

To start our quest for interactivity, let's make a "Hello world" menu item from scratch.

Hello world menu item

• In the src folder, create a new file: pluginMenuItemFilterOnCountries.tsx
• Copy in the following code:

import { MenuItemPlugin } from "@activeviam/activeui-sdk";

import { MapWidgetState } from "./map.types";


function useFilterOnCountriesMenuItem() {
  return { label: "Filter dashboard on countries" };
}

export const pluginMenuItemFilterOnCountries: MenuItemPlugin<MapWidgetState> = {
  key: "filter-on-countries",
  useMenuItem: useFilterOnCountriesMenuItem,
};

…don't forget to internationalize it!

  import { MenuItemPlugin } from "@activeviam/activeui-sdk";
+ import { useIntl } from "react-intl";

  import { MapWidgetState } from "./map.types";

  function useFilterOnCountriesMenuItem() {
    return {
-      label: "Filter dashboard on countries"
+      label: formatMessage({
+        id: "aui.plugins.menu-item.filter-on-countries.caption",
+      }),
+    }
  }

  export const pluginMenuItemFilterOnCountries: MenuItemPlugin<MapWidgetState> = {
    key: "filter-on-countries",
    useMenuItem: useFilterOnCountriesMenuItem,
+   translations: {
+     "en-US": {
+       caption: "Filter dashboard on countries",
+     },
+   },
  };

As always, we have to wire this new plugin into plugins.tsx.

Since we are making a menu item, we will put it in the menuItemPlugins array:

+ import { pluginMenuItemFilterOnCountries } from "./pluginMenuItemFilterOnCountries";


  const menuItemPlugins: MenuItemPlugin<any, any>[] = [
+   pluginMenuItemFilterOnCountries,
    pluginMenuItemDuplicateWidget,


    ...


  ];

However, our new menu item won't show up when we right-click our map yet.

• Add its key to the map's list of context menu items.

plugins.tsx:

...

+  pluginWidgetMap.contextMenuItems = [ "filter-on-countries" ];


...

It worked!

The menu item now appears when we right-click the map!

But nothing happens when we click it.

Let's fix this!

pluginMenuItemFilterOnCountries.tsx:

const FilterOnCountriesMenuItem: FC<MenuItemProps<MapWidgetState>> = (props) => {

  const { formatMessage } = useIntl();

  function useFilterOnCountriesMenuItem() {

+   const handleClick = () => {
+     alert("hello world!");
+   };

    return {
      label: formatMessage({
        id: "aui.plugins.menu-item.filter-on-countries.caption",
      }),
+     onClick: handleClick,
    }
  }

      ...

};

Great! And that's all there is to it!

On the next page, we will give our new menu item some functionality! 🕺