_onKeyDown()

in modules/core/src/controllers/controller.js [422:483]

• 61 lines of code
• 14 McCabe index (conditional complexity)

  _onKeyDown(event) {
    if (!this.keyboard) {
      return false;
    }
    const funcKey = this.isFunctionKeyPressed(event);
    const {controllerState} = this;
    let newControllerState;
    const interactionState = {};

    switch (event.srcEvent.code) {
      case 'Minus':
        newControllerState = funcKey
          ? controllerState.zoomOut().zoomOut()
          : controllerState.zoomOut();
        interactionState.isZooming = true;
        break;
      case 'Equal':
        newControllerState = funcKey ? controllerState.zoomIn().zoomIn() : controllerState.zoomIn();
        interactionState.isZooming = true;
        break;
      case 'ArrowLeft':
        if (funcKey) {
          newControllerState = controllerState.rotateLeft();
          interactionState.isRotating = true;
        } else {
          newControllerState = controllerState.moveLeft();
          interactionState.isPanning = true;
        }
        break;
      case 'ArrowRight':
        if (funcKey) {
          newControllerState = controllerState.rotateRight();
          interactionState.isRotating = true;
        } else {
          newControllerState = controllerState.moveRight();
          interactionState.isPanning = true;
        }
        break;
      case 'ArrowUp':
        if (funcKey) {
          newControllerState = controllerState.rotateUp();
          interactionState.isRotating = true;
        } else {
          newControllerState = controllerState.moveUp();
          interactionState.isPanning = true;
        }
        break;
      case 'ArrowDown':
        if (funcKey) {
          newControllerState = controllerState.rotateDown();
          interactionState.isRotating = true;
        } else {
          newControllerState = controllerState.moveDown();
          interactionState.isPanning = true;
        }
        break;
      default:
        return false;
    }
    this.updateViewport(newControllerState, this._getTransitionProps(), interactionState);
    return true;
  }