@kitware/vtk.js/Widgets/Widgets3D/LineWidget.js

Visualization Toolkit for the Web

import { f as distance2BetweenPoints } from '../../Common/Core/Math/index.js';
import { m as macro } from '../../macros2.js';
import generateState from './LineWidget/state.js';
import vtkAbstractWidgetFactory from '../Core/AbstractWidgetFactory.js';
import vtkArrowHandleRepresentation from '../Representations/ArrowHandleRepresentation.js';
import vtkPlaneManipulator from '../Manipulators/PlaneManipulator.js';
import vtkPolyLineRepresentation from '../Representations/PolyLineRepresentation.js';
import widgetBehavior from './LineWidget/behavior.js';
import { Behavior } from '../Representations/WidgetRepresentation/Constants.js';
import { ViewTypes } from '../Core/WidgetManager/Constants.js';
import { getPoint, updateTextPosition } from './LineWidget/helpers.js';

// ----------------------------------------------------------------------------
// Factory
// ----------------------------------------------------------------------------

function vtkLineWidget(publicAPI, model) {
  model.classHierarchy.push('vtkLineWidget');
  const superClass = {
    ...publicAPI
  };

  // --- Widget Requirement ---------------------------------------------------

  model.methodsToLink = ['activeScaleFactor', 'activeColor', 'useActiveColor', 'glyphResolution', 'defaultScale', 'scaleInPixels'];
  publicAPI.getRepresentationsForViewType = viewType => {
    switch (viewType) {
      case ViewTypes.DEFAULT:
      case ViewTypes.GEOMETRY:
      case ViewTypes.SLICE:
      case ViewTypes.VOLUME:
      default:
        return [{
          builder: vtkArrowHandleRepresentation,
          labels: ['handle1'],
          initialValues: {
            /*
             * This table sets the visibility of the handles' actors
             * 1st actor is a displayActor, which hides a rendered object on the HTML layer.
             * operating on its value allows to hide a handle to the user while still being
             * able to detect its presence, so the user can move it. 2nd actor is a classic VTK
             * actor which renders the object on the VTK scene
             */
            visibilityFlagArray: [false, false],
            coincidentTopologyParameters: {
              Point: {
                factor: -1.0,
                offset: -1.0
              },
              Line: {
                factor: -1.0,
                offset: -1.0
              },
              Polygon: {
                factor: -3.0,
                offset: -3.0
              }
            }
          }
        }, {
          builder: vtkArrowHandleRepresentation,
          labels: ['handle2'],
          initialValues: {
            /*
             * This table sets the visibility of the handles' actors
             * 1st actor is a displayActor, which hides a rendered object on the HTML layer.
             * operating on its value allows to hide a handle to the user while still being
             * able to detect its presence, so the user can move it. 2nd actor is a classic VTK
             * actor which renders the object on the VTK scene
             */
            visibilityFlagArray: [false, false],
            coincidentTopologyParameters: {
              Point: {
                factor: -1.0,
                offset: -1.0
              },
              Line: {
                factor: -1.0,
                offset: -1.0
              },
              Polygon: {
                factor: -3.0,
                offset: -3.0
              }
            }
          }
        }, {
          builder: vtkArrowHandleRepresentation,
          labels: ['moveHandle'],
          initialValues: {
            visibilityFlagArray: [false, false],
            coincidentTopologyParameters: {
              Point: {
                factor: -1.0,
                offset: -1.0
              },
              Line: {
                factor: -1.0,
                offset: -1.0
              },
              Polygon: {
                factor: -3.0,
                offset: -3.0
              }
            }
          }
        }, {
          builder: vtkPolyLineRepresentation,
          labels: ['handle1', 'handle2', 'moveHandle'],
          initialValues: {
            behavior: Behavior.HANDLE,
            pickable: true
          }
        }];
    }
  };

  // --- Public methods -------------------------------------------------------

  publicAPI.getDistance = () => {
    const p1 = getPoint(0, model.widgetState);
    const p2 = getPoint(1, model.widgetState);
    return p1 && p2 ? Math.sqrt(distance2BetweenPoints(p1, p2)) : 0;
  };
  publicAPI.setManipulator = manipulator => {
    superClass.setManipulator(manipulator);
    model.widgetState.getMoveHandle().setManipulator(manipulator);
    model.widgetState.getHandle1().setManipulator(manipulator);
    model.widgetState.getHandle2().setManipulator(manipulator);
  };

  // --------------------------------------------------------------------------
  // initialization
  // --------------------------------------------------------------------------

  /**
   * TBD: Why setting the move handle ?
   */
  model.widgetState.onBoundsChange(bounds => {
    const center = [(bounds[0] + bounds[1]) * 0.5, (bounds[2] + bounds[3]) * 0.5, (bounds[4] + bounds[5]) * 0.5];
    model.widgetState.getMoveHandle().setOrigin(center);
  });
  let linePosSub = model.widgetState.getPositionOnLine().onModified(() => {
    updateTextPosition(model);
  });

  // Default manipulator
  publicAPI.setManipulator(model.manipulator || vtkPlaneManipulator.newInstance({
    useCameraNormal: true
  }));
  publicAPI.delete = macro.chain(publicAPI.delete, () => {
    linePosSub.unsubscribe();
    linePosSub = null;
  });
}

// ----------------------------------------------------------------------------

const defaultValues = initialValues => ({
  // manipulator: null,
  behavior: widgetBehavior,
  widgetState: generateState(),
  ...initialValues
});

// ----------------------------------------------------------------------------

function extend(publicAPI, model, initialValues = {}) {
  Object.assign(model, defaultValues(initialValues));
  vtkAbstractWidgetFactory.extend(publicAPI, model, initialValues);
  macro.setGet(publicAPI, model, ['manipulator']);
  vtkLineWidget(publicAPI, model);
}

// ----------------------------------------------------------------------------

const newInstance = macro.newInstance(extend, 'vtkLineWidget');

// ----------------------------------------------------------------------------

var vtkLineWidget$1 = {
  newInstance,
  extend
};

export { vtkLineWidget$1 as default, extend, newInstance };