import {
  JupyterFrontEnd,
  JupyterFrontEndPlugin
} from '@jupyterlab/application';

import {
  INotebookTracker
} from '@jupyterlab/notebook';

import {
  BoxPanel
} from '@lumino/widgets';

import {
  CreateAssignmentWidget
} from './create_assignment_extension';

/**
 * Initialization data for the create_assignment extension.
 */
export const create_assignment_extension: JupyterFrontEndPlugin<void> = {
  id: 'create-assignment',
  autoStart: true,
  requires: [INotebookTracker],
  activate: activate_extension
};

function activate_extension(app: JupyterFrontEnd, tracker: INotebookTracker) {
  console.log('Activating extension "create_assignment".');
  const panel = new BoxPanel();
  const createAssignmentWidget = new CreateAssignmentWidget(tracker);
  panel.addWidget(createAssignmentWidget);
  panel.id = 'nbgrader-create_assignemnt';
  panel.title.label = 'Create Assignment';
  panel.title.caption = 'nbgrader Create Assignment';
  app.shell.add(panel, 'right');
  console.log('Extension "create_assignment" activated.');
}

export default create_assignment_extension;

import {
  JupyterFrontEnd,
  JupyterFrontEndPlugin
} from '@jupyterlab/application';

import {
  INotebookTracker
} from '@jupyterlab/notebook';

import {
  Panel, PanelLayout
} from '@lumino/widgets';

import {
  CreateAssignmentWidget
} from './create_assignment_extension';

/**
 * Initialization data for the create_assignment extension.
 */
export const create_assignment_extension: JupyterFrontEndPlugin<void> = {
  id: 'create-assignment',
  autoStart: true,
  requires: [INotebookTracker],
  activate: activate_extension
};

function activate_extension(app: JupyterFrontEnd, tracker: INotebookTracker) {
  console.log('Activating extension "create_assignment".');
  const panel = new Panel({layout: new PanelLayout({fitPolicy: 'set-min-size'})});
  const createAssignmentWidget = new CreateAssignmentWidget(tracker);
  panel.addWidget(createAssignmentWidget);
  panel.id = 'nbgrader-create_assignemnt';
  panel.title.label = 'Create Assignment';
  panel.title.caption = 'nbgrader Create Assignment';
  app.shell.add(panel, 'right');
  console.log('Extension "create_assignment" activated.');
}

export default create_assignment_extension;

Change create assignment panel from 'BoxPanel' to 'Panel'. Using BoxPanel the min size was changed to 0px, and the panel does not seem to open
Change create assignment panel from 'BoxPanel' to 'Panel'. Using BoxPanel the min size was changed to 0px, and the panel does not seem to open
