grafana/public/app/features/scenes/dashboard/DashboardScene.tsx

import { css } from '@emotion/css';
import React from 'react';

import { GrafanaTheme2, PageLayoutType } from '@grafana/data';
import { config, locationService } from '@grafana/runtime';
import {
  UrlSyncManager,
  SceneObjectBase,
  SceneComponentProps,
  SceneObject,
  SceneObjectStatePlain,
} from '@grafana/scenes';
import { PageToolbar, ToolbarButton, useStyles2 } from '@grafana/ui';
import { AppChromeUpdate } from 'app/core/components/AppChrome/AppChromeUpdate';
import { Page } from 'app/core/components/Page/Page';

interface DashboardSceneState extends SceneObjectStatePlain {
  title: string;
  uid?: string;
  body: SceneObject;
  actions?: SceneObject[];
  controls?: SceneObject[];
}

export class DashboardScene extends SceneObjectBase<DashboardSceneState> {
  public static Component = DashboardSceneRenderer;
  private urlSyncManager?: UrlSyncManager;

  public activate() {
    super.activate();
  }

  /**
   * It's better to do this before activate / mount to not trigger unnessary re-renders
   */
  public initUrlSync() {
    this.urlSyncManager = new UrlSyncManager(this);
    this.urlSyncManager.initSync();
  }

  public deactivate() {
    super.deactivate();

    if (this.urlSyncManager) {
      this.urlSyncManager!.cleanUp();
    }
  }
}

function DashboardSceneRenderer({ model }: SceneComponentProps<DashboardScene>) {
  const { title, body, actions = [], uid, controls } = model.useState();
  const styles = useStyles2(getStyles);

  const toolbarActions = (actions ?? []).map((action) => <action.Component key={action.state.key} model={action} />);

  toolbarActions.push(
    <ToolbarButton icon="apps" onClick={() => locationService.push(`/d/${uid}`)} tooltip="View as Dashboard" />
  );
  const pageToolbar = config.featureToggles.topnav ? (
    <AppChromeUpdate actions={toolbarActions} />
  ) : (
    <PageToolbar title={title}>{toolbarActions}</PageToolbar>
  );

  return (
    <Page navId="scenes" pageNav={{ text: title }} layout={PageLayoutType.Canvas} toolbar={pageToolbar}>
      {controls && (
        <div className={styles.controls}>
          {controls.map((control) => (
            <control.Component key={control.state.key} model={control} />
          ))}
        </div>
      )}
      <div className={styles.body}>
        <body.Component model={body} />
      </div>
    </Page>
  );
}

function getStyles(theme: GrafanaTheme2) {
  return {
    body: css({
      flexGrow: 1,
      display: 'flex',
      gap: '8px',
    }),
    controls: css({
      display: 'flex',
      paddingBottom: theme.spacing(2),
      flexWrap: 'wrap',
      alignItems: 'center',
      gap: theme.spacing(1),
    }),
  };
}