diagram-gost/src/CustomPaletteModule.ts

import ElementFactory from "diagram-js/lib/core/ElementFactory";
import Palette from "diagram-js/lib/features/palette/Palette";
import LassoTool from "diagram-js/lib/features/lasso-tool/LassoTool";
import Create from "diagram-js/lib/features/create/Create";
import GlobalConnect from "diagram-js/lib/features/global-connect/GlobalConnect";

function PalettePlugin (create: Create,
                        elementFactory:ElementFactory,
                        globalConnect: GlobalConnect,
                        lassoTool: LassoTool,
                        palette: Palette) {
    palette.registerProvider({
        getPaletteEntries: () => ({
          'hand-tool': {
            group: 'tools',
            className: 'icon-hand-tool',
            title: 'Hand Tool',
            action: {
              click: function() {
                console.log("Hello");
              }
            }
          },
          'lasso-tool': {
            group: 'tools',
            className: 'icon-lasso-tool',
            title: 'Lasso Tool',
            action: {
              click: function(event) {
                lassoTool.activateSelection(event as MouseEvent);
              }
            }
          },
          'tool-separator': {
            group: 'tools',
            separator: true,
            action: {}
          },
          'create-shape': {
            group: 'create',
            className: 'icon-create-shape',
            title: 'Create Shape',
            action: {
              click: function() {
                var shape = elementFactory.createShape({
                  width: 100,
                  height: 80,
                  canStartConnection:true
                });
                console.log(shape.canStartConnection);
                create.start(event, shape);
              }
            }
          },
          'create-connection': {
            group: 'create',
            className: 'connection-create-shape',
            title: 'Create Connection',
            action: {
              click: (event) => {
                globalConnect.start(event, false);
              }
            }
          }
        })
      });
}

export default {
    __init__: [ 'palettePlugin' ],
      palettePlugin: [ 'type', PalettePlugin ]
 };