markgojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
176 lines (175 loc) • 7.44 kB
JavaScript
var __extends = (this && this.__extends) || (function () {
var extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define(["require", "exports", "../release/go"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/*
* Copyright (C) 1998-2019 by Northwoods Software Corporation. All Rights Reserved.
*/
var go = require("../release/go");
// A custom Tool for moving a label on a Link that keeps the label on the link's path.
/**
* @constructor
* @extends Tool
* @class
* This tool only works when the Link has a label marked by the "_isLinkLabel" property.
*/
var LinkLabelOnPathDraggingTool = /** @class */ (function (_super) {
__extends(LinkLabelOnPathDraggingTool, _super);
function LinkLabelOnPathDraggingTool() {
var _this = _super.call(this) || this;
/** @type {GraphObject} */
_this.label = null;
/** @type {number} */
_this._originalIndex = null;
/** @type {number} */
_this._originalFraction = null;
_this.name = "LinkLabelOnPathDragging";
return _this;
}
/**
* This tool can only start if the mouse has moved enough so that it is not a click,
* and if the mouse down point is on a GraphObject "label" in a Link Panel,
* as determined by findLabel().
* @this {LinkLabelOnPathDraggingTool}
* @return {boolean}
*/
LinkLabelOnPathDraggingTool.prototype.canStart = function () {
if (!go.Tool.prototype.canStart.call(this))
return false;
var diagram = this.diagram;
if (diagram === null)
return false;
// require left button & that it has moved far enough away from the mouse down point, so it isn't a click
var e = diagram.lastInput;
if (!e.left)
return false;
if (!this.isBeyondDragSize())
return false;
return this.findLabel() !== null;
};
/**
* From the GraphObject at the mouse point, search up the visual tree until we get to
* an object that has the "_isLinkLabel" property set to true and that is an immediate child of a Link Panel.
* @this {LinkLabelOnPathDraggingTool}
* @return {GraphObject} This returns null if no such label is at the mouse down point.
*/
LinkLabelOnPathDraggingTool.prototype.findLabel = function () {
var diagram = this.diagram;
var e = diagram.lastInput;
var elt = diagram.findObjectAt(e.documentPoint, null, null);
if (elt === null || !(elt.part instanceof go.Link))
return null;
while (elt.panel !== elt.part) {
elt = elt.panel;
}
// If it's not marked as "_isLinkLabel", don't consider it a label:
if (!elt["_isLinkLabel"])
return null;
return elt;
};
;
/**
* Start a transaction, call findLabel and remember it as the "label" property,
* and remember the original values for the label's segment properties.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doActivate = function () {
this.startTransaction("Shifted Label");
this.label = this.findLabel();
if (this.label !== null) {
this._originalIndex = this.label.segmentIndex;
this._originalFraction = this.label.segmentFraction;
}
go.Tool.prototype.doActivate.call(this);
};
/**
* Stop any ongoing transaction.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doDeactivate = function () {
go.Tool.prototype.doDeactivate.call(this);
this.stopTransaction();
};
/**
* Clear any reference to a label element.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doStop = function () {
this.label = null;
go.Tool.prototype.doStop.call(this);
};
/**
* Restore the label's original value for GraphObject.segment... properties.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doCancel = function () {
if (this.label !== null) {
this.label.segmentIndex = this._originalIndex;
this.label.segmentFraction = this._originalFraction;
}
go.Tool.prototype.doCancel.call(this);
};
/**
* During the drag, call updateSegmentOffset in order to set the segment... properties of the label.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doMouseMove = function () {
if (!this.isActive)
return;
this.updateSegmentOffset();
};
/**
* At the end of the drag, update the segment properties of the label and finish the tool,
* completing a transaction.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.doMouseUp = function () {
if (!this.isActive)
return;
this.updateSegmentOffset();
this.transactionResult = "Shifted Label";
this.stopTool();
};
/**
* Save the label's GraphObject.segmentIndex and segmentFraction at the closest point to the mouse.
* @this {LinkLabelOnPathDraggingTool}
*/
LinkLabelOnPathDraggingTool.prototype.updateSegmentOffset = function () {
var lab = this.label;
if (lab === null)
return;
var link = lab.part;
if (!(link instanceof go.Link))
return;
var last = this.diagram.lastInput.documentPoint;
var idx = link.findClosestSegment(last);
idx = Math.min(Math.max(link.firstPickIndex, idx), link.lastPickIndex - 1);
var p1 = link.getPoint(idx);
var p2 = link.getPoint(idx + 1);
var total = Math.sqrt(p1.distanceSquaredPoint(p2));
var p = last.copy().projectOntoLineSegmentPoint(p1, p2);
var frac = Math.sqrt(p1.distanceSquaredPoint(p)) / total;
lab.segmentIndex = idx;
lab.segmentFraction = frac;
};
return LinkLabelOnPathDraggingTool;
}(go.Tool));
exports.LinkLabelOnPathDraggingTool = LinkLabelOnPathDraggingTool;
});