40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
/**
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* Custom Rules for the DataObject - Rules allow you to prevent an
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* action from happening in the diagram, such as dropping an element
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* where it doesn't belong.
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*
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* Here we don't allow people to move a data object Reference
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* from one parent to another, as we can't move the data objects
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* from one parent to another.
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*
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*/
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import RuleProvider from 'diagram-js/lib/features/rules/RuleProvider';
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import inherits from 'inherits-browser';
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import { is } from 'bpmn-js/lib/util/ModelUtil';
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export default function DataObjectRules(eventBus) {
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RuleProvider.call(this, eventBus);
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}
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inherits(DataObjectRules, RuleProvider);
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const HIGH_PRIORITY = 1500;
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DataObjectRules.prototype.init = function() {
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this.addRule('elements.move', HIGH_PRIORITY,function(context) {
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let elements = context.shapes;
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let target = context.target;
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return canDrop(elements, target);
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});
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};
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function canDrop(elements, target) {
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for (let element of elements) {
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if (is(element, 'bpmn:DataObjectReference') && element.parent && target) {
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return target === element.parent;
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}
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// Intentionally returning null here to allow other rules to fire.
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}
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}
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DataObjectRules.prototype.canDrop = canDrop;
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DataObjectRules.$inject = [ 'eventBus' ];
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