198 lines
8.2 KiB
JavaScript
198 lines
8.2 KiB
JavaScript
var __extends = (this && this.__extends) || (function () {
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var extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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(function (factory) {
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if (typeof module === "object" && typeof module.exports === "object") {
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var v = factory(require, exports);
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if (v !== undefined) module.exports = v;
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}
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else if (typeof define === "function" && define.amd) {
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define(["require", "exports", "../release/go"], factory);
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}
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})(function (require, exports) {
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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/*
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* Copyright (C) 1998-2017 by Northwoods Software Corporation. All Rights Reserved.
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*/
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var go = require("../release/go");
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// A custom Tool for moving a label on a Link
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/**
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* @constructor
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* @extends Tool
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* @class
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* This tool only works when the Link has a label
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* that is positioned at the Link.midPoint plus some offset.
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* It does not work for labels that have a particular segmentIndex.
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*/
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var LinkLabelDraggingTool = /** @class */ (function (_super) {
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__extends(LinkLabelDraggingTool, _super);
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function LinkLabelDraggingTool() {
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var _this = _super !== null && _super.apply(this, arguments) || this;
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_this.name = "LinkLabelDragging";
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/** @type {GraphObject} */
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_this.label = null;
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/** @type {Point} */
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_this._offset = new go.Point(); // of the mouse relative to the center of the label object
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/** @type {Point} */
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_this._originalOffset = null;
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return _this;
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}
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/**
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* This tool can only start if the mouse has moved enough so that it is not a click,
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* and if the mouse down point is on a GraphObject "label" in a Link Panel,
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* as determined by findLabel().
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* @this {LinkLabelDraggingTool}
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* @return {boolean}
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*/
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LinkLabelDraggingTool.prototype.canStart = function () {
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if (!go.Tool.prototype.canStart.call(this))
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return false;
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var diagram = this.diagram;
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if (diagram === null)
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return false;
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// require left button & that it has moved far enough away from the mouse down point, so it isn't a click
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var e = diagram.lastInput;
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if (!e.left)
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return false;
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if (!this.isBeyondDragSize())
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return false;
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return this.findLabel() !== null;
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};
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/**
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* From the GraphObject at the mouse point, search up the visual tree until we get to
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* an object that is a label of a Link.
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* @this {LinkLabelDraggingTool}
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* @return {GraphObject} This returns null if no such label is at the mouse down point.
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*/
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LinkLabelDraggingTool.prototype.findLabel = function () {
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var diagram = this.diagram;
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var e = diagram.lastInput;
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var elt = diagram.findObjectAt(e.documentPoint, null, null);
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if (elt === null || !(elt.part instanceof go.Link))
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return null;
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while (elt.panel !== elt.part) {
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elt = elt.panel;
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}
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// If it's at an arrowhead segment index, don't consider it a label:
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if (elt.segmentIndex === 0 || elt.segmentIndex === -1)
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return null;
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return elt;
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};
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;
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/**
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* Start a transaction, call findLabel and remember it as the "label" property,
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* and remember the original value for the label's segmentOffset property.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doActivate = function () {
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this.startTransaction("Shifted Label");
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this.label = this.findLabel();
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if (this.label !== null) {
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// compute the offset of the mouse-down point relative to the center of the label
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this._offset = this.diagram.firstInput.documentPoint.copy().subtract(this.label.getDocumentPoint(go.Spot.Center));
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this._originalOffset = this.label.segmentOffset.copy();
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}
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go.Tool.prototype.doActivate.call(this);
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};
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/**
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* Stop any ongoing transaction.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doDeactivate = function () {
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go.Tool.prototype.doDeactivate.call(this);
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this.stopTransaction();
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};
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/**
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* Clear any reference to a label element.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doStop = function () {
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this.label = null;
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go.Tool.prototype.doStop.call(this);
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};
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/**
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* Restore the label's original value for GraphObject.segmentOffset.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doCancel = function () {
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if (this.label !== null) {
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this.label.segmentOffset = this._originalOffset;
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}
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go.Tool.prototype.doCancel.call(this);
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};
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/**
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* During the drag, call updateSegmentOffset in order to set
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* the GraphObject.segmentOffset of the label.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doMouseMove = function () {
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if (!this.isActive)
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return;
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this.updateSegmentOffset();
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};
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/**
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* At the end of the drag, update the segment offset of the label and finish the tool,
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* completing a transaction.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.doMouseUp = function () {
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if (!this.isActive)
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return;
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this.updateSegmentOffset();
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this.transactionResult = "Shifted Label";
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this.stopTool();
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};
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/**
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* Save the label's GraphObject.segmentOffset as a rotated offset from the midpoint of the
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* Link that the label is in.
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* @this {LinkLabelDraggingTool}
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*/
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LinkLabelDraggingTool.prototype.updateSegmentOffset = function () {
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var lab = this.label;
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if (lab === null)
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return;
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var link = lab.part;
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if (!(link instanceof go.Link))
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return;
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var last = this.diagram.lastInput.documentPoint;
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var idx = lab.segmentIndex;
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var numpts = link.pointsCount;
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// if the label is a "mid" label, assume it is positioned differently from a label at a particular segment
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if (idx < -numpts || idx >= numpts) {
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var mid = link.midPoint;
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// need to rotate this point to account for the angle of the link segment at the mid-point
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var p = new go.Point(last.x - this._offset.x - mid.x, last.y - this._offset.y - mid.y);
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lab.segmentOffset = p.rotate(-link.midAngle);
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}
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else {
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var frac = lab.segmentFraction;
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var a, b;
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if (idx >= 0) {
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a = link.getPoint(idx);
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b = (idx < numpts - 1) ? link.getPoint(idx + 1) : a;
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}
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else {
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var i = numpts + idx;
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a = link.getPoint(i);
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b = (i > 0) ? link.getPoint(i - 1) : a;
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}
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var labx = a.x + (b.x - a.x) * frac;
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var laby = a.y + (b.y - a.y) * frac;
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var p = new go.Point(last.x - this._offset.x - labx, last.y - this._offset.y - laby);
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var segangle = (idx >= 0) ? a.directionPoint(b) : b.directionPoint(a);
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lab.segmentOffset = p.rotate(-segangle);
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}
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};
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return LinkLabelDraggingTool;
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}(go.Tool));
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exports.LinkLabelDraggingTool = LinkLabelDraggingTool;
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});
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