sprotty
Version:
A next-gen framework for graphical views
45 lines • 2.53 kB
TypeScript
/********************************************************************************
* Copyright (c) 2019 TypeFox and others.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the Eclipse
* Public License v. 2.0 are satisfied: GNU General Public License, version 2
* with the GNU Classpath Exception which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
********************************************************************************/
import { Point } from "sprotty-protocol/lib/utils/geometry";
import { InstanceRegistry } from "../../utils/registry";
import { SConnectableElementImpl } from "./model";
export declare const DIAMOND_ANCHOR_KIND = "diamond";
export declare const ELLIPTIC_ANCHOR_KIND = "elliptic";
export declare const RECTANGULAR_ANCHOR_KIND = "rectangular";
export interface IAnchorComputer {
readonly kind: string;
/**
* Compute an anchor position for routing an edge towards this element.
*
* The default implementation returns the element's center point. If edges should be connected
* differently, e.g. to some point on the boundary of the element's view, the according computation
* should be implemented in a subclass by overriding this method.
*
* @param connectable The node or port an edge should be connected to.
* @param referencePoint The point from which the edge is routed towards this elemet, in the same
* coordintae system as the connectable.
* @param offset An optional offset value to be considered in the anchor computation;
* positive values should shift the anchor away from this element, negative values
* should shift the anchor more to the inside. Use this to adapt ot arrow heads.
*/
getAnchor(connectable: SConnectableElementImpl, referencePoint: Point, offset?: number): Point;
}
export declare class AnchorComputerRegistry extends InstanceRegistry<IAnchorComputer> {
constructor(anchors: IAnchorComputer[]);
protected get defaultAnchorKind(): string;
get(routerKind: string, anchorKind?: string): IAnchorComputer;
}
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