352 lines
11 KiB
TypeScript
352 lines
11 KiB
TypeScript
"use strict";
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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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import * as go from "../release/go";
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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 GeometryReshapingTool class allows for a Shape's Geometry to be modified by the user
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* via the dragging of tool handles.
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* This does not handle Links, whose routes should be reshaped by the LinkReshapingTool.
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* The {@link #reshapeObjectName} needs to identify the named {@link Shape} within the
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* selected {@link Part}.
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* If the shape cannot be found or if its {@link Shape#geometry} is not of type {@link Geometry#Path},
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* this will not show any GeometryReshaping {@link Adornment}.
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* At the current time this tool does not support adding or removing {@link PathSegment}s to the Geometry.
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*/
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export class GeometryReshapingTool extends go.Tool {
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/** @type {GraphObject} */
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private _handleArchetype: go.GraphObject;
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constructor()
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{
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super();
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const h: go.Shape = new go.Shape();
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h.figure = "Diamond";
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h.desiredSize = new go.Size(7, 7);
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h.fill = "lightblue";
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h.stroke = "dodgerblue";
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h.cursor = "move";
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this._handleArchetype = h;
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}
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public readonly name = "GeometryReshaping";
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/** @type {string} */
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private _reshapeObjectName = 'SHAPE'; //??? can't add Part.reshapeObjectName property
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// there's no Part.reshapeAdornmentTemplate either
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// internal state
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/** @type {GraphObject} */
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private _handle: go.GraphObject | null = null;
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/** @type {Shape} */
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private _adornedShape: go.Shape | null = null;
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/** @type {Geometry} */
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private _originalGeometry: go.Geometry | null = null; // in case the tool is cancelled and the UndoManager is not enabled
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/**
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* A small GraphObject used as a reshape handle for each segment.
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* The default GraphObject is a small blue diamond.
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* @name GeometryReshapingTool#handleArchetype
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* @function.
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* @return {GraphObject}
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*/
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get handleArchetype(): go.GraphObject { return this._handleArchetype }
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set handleArchetype(value: go.GraphObject) { this._handleArchetype = value }
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/**
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* The name of the GraphObject to be reshaped.
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* @name GeometryReshapingTool#reshapeObjectName
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* @function.
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* @return {string}
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*/
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get reshapeObjectName(): string { return this._reshapeObjectName }
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set reshapeObjectName(value: string) { this._reshapeObjectName = value }
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/**
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* This read-only property returns the {@link GraphObject} that is the tool handle being dragged by the user.
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* This will be contained by an {@link Adornment} whose category is "GeometryReshaping".
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* Its {@link Adornment#adornedObject} is the same as the {@link #adornedShape}.
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* @name GeometryReshapingTool#handle
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* @function.
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* @return {GraphObject}
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*/
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get handle(): go.GraphObject | null { return this._handle }
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/**
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* Gets the {@link Shape} that is being reshaped.
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* This must be contained within the selected Part.
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* @name GeometryReshapingTool#adornedShape
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* @function.
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* @return {Shape}
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*/
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get adornedShape(): go.Shape | null { return this._adornedShape }
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/**
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* This read-only property remembers the original value for {@link Shape#geometry},
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* so that it can be restored if this tool is cancelled.
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* @name GeometryReshapingTool#originalGeometry
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* @function.
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* @return {Geometry}
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*/
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get originalGeometry(): go.Geometry | null { return this._originalGeometry }
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/**
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* Show an {@link Adornment} with a reshape handle at each point of the geometry.
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* Don't show anything if {@link #reshapeObjectName} doesn't identify a {@link Shape}
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* that has a {@link Shape#geometry} of type {@link Geometry#Path}.
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* @this {GeometryReshapingTool}
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* @param {Part} part the part.
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*/
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public updateAdornments(part: go.Part) {
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if (part === null || part instanceof go.Link) return; // this tool never applies to Links
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if (part.isSelected && !this.diagram.isReadOnly) {
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var selelt = part.findObject(this.reshapeObjectName);
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if (selelt instanceof go.Shape && selelt.actualBounds.isReal() && selelt.isVisibleObject() &&
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part.canReshape() && part.actualBounds.isReal() && part.isVisible() &&
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selelt.geometry.type === go.Geometry.Path) {
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var adornment = part.findAdornment(this.name);
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if (adornment === null) {
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adornment = this.makeAdornment(selelt);
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}
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if (adornment !== null) {
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// update the position/alignment of each handle
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var geo = selelt.geometry;
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var b = geo.bounds;
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// update the size of the adornment
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adornment.findObject("BODY").desiredSize = b.size;
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adornment.elements.each(function (h: any) {
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if (h._typ === undefined) return;
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var fig = geo.figures.elt(h._fig);
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var seg = fig.segments.elt(h._seg);
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var x = 0;
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var y = 0;
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switch (h._typ) {
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case 0: x = fig.startX; y = fig.startY; break;
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case 1: x = seg.endX; y = seg.endY; break;
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case 2: x = seg.point1X; y = seg.point1Y; break;
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case 3: x = seg.point2X; y = seg.point2Y; break;
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}
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var bw = b.width;
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if (bw === 0) bw = 0.001;
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var bh = b.height;
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if (bh === 0) bh = 0.001;
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h.alignment = new go.Spot(Math.max(0, Math.min((x - b.x) / bw, 1)),
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Math.max(0, Math.min((y - b.y) / bh, 1)));
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});
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part.addAdornment(this.name, adornment);
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adornment.location = selelt.getDocumentPoint(go.Spot.TopLeft);
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adornment.angle = selelt.getDocumentAngle();
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return;
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}
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}
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}
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part.removeAdornment(this.name);
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public makeAdornment(selelt: go.Shape) {
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var adornment = new go.Adornment();
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adornment.type = go.Panel.Spot;
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adornment.locationObjectName = "BODY";
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adornment.locationSpot = new go.Spot(0, 0, -selelt.strokeWidth / 2, -selelt.strokeWidth / 2);
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var h: any = new go.Shape();
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h.name = "BODY";
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h.fill = null;
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h.stroke = null;
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h.strokeWidth = 0;
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adornment.add(h);
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var geo = selelt.geometry;
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// requires Path Geometry, checked above in updateAdornments
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for (var f = 0; f < geo.figures.count; f++) {
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var fig = geo.figures.elt(f);
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for (var g = 0; g < fig.segments.count; g++) {
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var seg = fig.segments.elt(g);
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var h;
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if (g === 0) {
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h = this.makeHandle(selelt, fig, seg);
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if (h !== null) {
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h._typ = 0;
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h._fig = f;
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h._seg = g;
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adornment.add(h);
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}
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}
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h = this.makeHandle(selelt, fig, seg);
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if (h !== null) {
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h._typ = 1;
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h._fig = f;
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h._seg = g;
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adornment.add(h);
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}
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if (seg.type === go.PathSegment.QuadraticBezier || seg.type === go.PathSegment.Bezier) {
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h = this.makeHandle(selelt, fig, seg);
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if (h !== null) {
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h._typ = 2;
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h._fig = f;
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h._seg = g;
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adornment.add(h);
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}
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if (seg.type === go.PathSegment.Bezier) {
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h = this.makeHandle(selelt, fig, seg);
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if (h !== null) {
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h._typ = 3;
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h._fig = f;
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h._seg = g;
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adornment.add(h);
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}
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}
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}
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}
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}
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adornment.category = this.name;
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adornment.adornedObject = selelt;
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return adornment;
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public makeHandle(selelt: go.GraphObject, fig: go.PathFigure, seg: go.PathSegment) {
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var h = this.handleArchetype;
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if (h === null) return null;
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return h.copy();
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public canStart(): boolean {
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if (!this.isEnabled) return false;
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var diagram = this.diagram;
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if (diagram === null || diagram.isReadOnly) return false;
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if (!diagram.allowReshape) return false;
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if (!diagram.lastInput.left) return false;
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var h = this.findToolHandleAt(diagram.firstInput.documentPoint, this.name);
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return (h !== null);
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public doActivate() {
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var diagram = this.diagram;
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if (diagram === null) return;
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this._handle = this.findToolHandleAt(diagram.firstInput.documentPoint, this.name);
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if (this._handle === null) return;
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var shape = (this.handle.part as go.Adornment).adornedObject as go.Shape;
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if (!shape) return;
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this._adornedShape = shape;
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diagram.isMouseCaptured = true;
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this.startTransaction(this.name);
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this._originalGeometry = shape.geometry;
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this.isActive = true;
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public doDeactivate() {
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this.stopTransaction();
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this._handle = null;
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this._adornedShape = null;
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var diagram = this.diagram;
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if (diagram !== null) diagram.isMouseCaptured = false;
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this.isActive = false;
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public doCancel() {
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var shape = this._adornedShape;
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if (shape !== null) {
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// explicitly restore the original route, in case !UndoManager.isEnabled
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shape.geometry = this._originalGeometry;
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}
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this.stopTool();
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public doMouseMove() {
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var diagram = this.diagram;
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if (this.isActive && diagram !== null) {
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var newpt = this.computeReshape(diagram.lastInput.documentPoint);
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this.reshape(newpt);
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}
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};
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/**
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* @this {GeometryReshapingTool}
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*/
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public doMouseUp() {
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var diagram = this.diagram;
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if (this.isActive && diagram !== null) {
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var newpt = this.computeReshape(diagram.lastInput.documentPoint);
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this.reshape(newpt);
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this.transactionResult = this.name; // success
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}
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this.stopTool();
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};
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/**
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* @expose
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* @this {GeometryReshapingTool}
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* @param {Point} newPoint the value of the call to {@link #computeReshape}.
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*/
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public reshape(newPoint: go.Point) {
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var shape = this.adornedShape;
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var locpt = shape.getLocalPoint(newPoint);
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var geo = shape.geometry.copy();
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shape.desiredSize = new go.Size(NaN, NaN); // set the desiredSize once we've gotten our Geometry so we don't clobber
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var type = (this.handle as any)._typ;
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if (type === undefined) return;
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var fig = geo.figures.elt((this.handle as any)._fig);
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var seg = fig.segments.elt((this.handle as any)._seg);
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switch (type) {
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case 0: fig.startX = locpt.x; fig.startY = locpt.y; break;
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case 1: seg.endX = locpt.x; seg.endY = locpt.y; break;
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case 2: seg.point1X = locpt.x; seg.point1Y = locpt.y; break;
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case 3: seg.point2X = locpt.x; seg.point2Y = locpt.y; break;
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}
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var offset = geo.normalize(); // avoid any negative coordinates in the geometry
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shape.geometry = geo; // modify the Shape
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var part = shape.part; // move the Part holding the Shape
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if (!part.locationSpot.equals(go.Spot.Center)) { // but only if the locationSpot isn't Center
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part.move(part.position.copy().subtract(offset));
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}
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this.updateAdornments(part); // update any Adornments of the Part
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this.diagram.maybeUpdate(); // force more frequent drawing for smoother looking behavior
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};
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/**
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* @expose
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* @this {GeometryReshapingTool}
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* @param {Point} p the point where the handle is being dragged.
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* @return {Point}
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*/
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public computeReshape(p: go.Point) {
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return p; // no constraints on the points
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};
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}
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