# all files / bpmn-js/lib/features/modeling/behavior/ ResizeBehavior.js

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    1×import { is } from '../../../util/ModelUtil';

    import { isExpanded } from '../../../util/DiUtil';

    import { getParticipantResizeConstraints } from './util/ResizeUtil';

    var HIGH_PRIORITY = 1500;

    var PARTICIPANT_MIN_DIMENSIONS = { width: 300, height: 150 },
        SUB_PROCESS_MIN_DIMENSIONS = { width: 140, height: 120 },
        TEXT_ANNOTATION_MIN_DIMENSIONS = { width: 50, height: 30 };

    /**
     * Set minimum bounds/resize constraints on resize.
     *
     * @param {EventBus} eventBus
     */
    export default function ResizeBehavior(eventBus) {
      eventBus.on('resize.start', HIGH_PRIORITY, function(event) {
        var context = event.context,
            shape = context.shape,
            direction = context.direction,
            balanced = context.balanced;

        if (is(shape, 'bpmn:Lane') || is(shape, 'bpmn:Participant')) {
          context.resizeConstraints = getParticipantResizeConstraints(shape, direction, balanced);
        }

        if (is(shape, 'bpmn:Participant')) {
          context.minDimensions = PARTICIPANT_MIN_DIMENSIONS;
        }

        if (is(shape, 'bpmn:SubProcess') && isExpanded(shape)) {
          context.minDimensions = SUB_PROCESS_MIN_DIMENSIONS;
        }

        if (is(shape, 'bpmn:TextAnnotation')) {
          context.minDimensions = TEXT_ANNOTATION_MIN_DIMENSIONS;
        }
      });
    }

    ResizeBehavior.$inject = [ 'eventBus' ];