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351 lines
14 KiB
JavaScript
Executable File
351 lines
14 KiB
JavaScript
Executable File
/*
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* Copyright (C) 1998-2020 by Northwoods Software Corporation. All Rights Reserved.
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*/
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/*
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* This is an extension and not part of the main GoJS library.
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* Note that the API for this class may change with any version, even point releases.
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* If you intend to use an extension in production, you should copy the code to your own source directory.
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* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
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* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
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*/
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import * as go from '../release/go-module.js';
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/**
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* The 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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* If you want to experiment with this extension, try the <a href="../../extensionsTS/GeometryReshaping.html">Geometry Reshaping</a> sample.
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* @category Tool Extension
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*/
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export class GeometryReshapingTool extends go.Tool {
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/**
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* Constructs a GeometryReshapingTool and sets the handle and name of the tool.
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*/
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constructor() {
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super();
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this._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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this._handle = null;
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this._adornedShape = null;
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this._originalGeometry = null; // in case the tool is cancelled and the UndoManager is not enabled
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const h = 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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this.name = 'GeometryReshaping';
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}
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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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*/
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get handleArchetype() { return this._handleArchetype; }
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set handleArchetype(value) { this._handleArchetype = value; }
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/**
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* The name of the GraphObject to be reshaped.
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*/
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get reshapeObjectName() { return this._reshapeObjectName; }
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set reshapeObjectName(value) { 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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*/
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get handle() { 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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*/
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get adornedShape() { 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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*/
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get originalGeometry() { 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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*/
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updateAdornments(part) {
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if (part === null || part instanceof go.Link)
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return; // this tool never applies to Links
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if (part.isSelected && !this.diagram.isReadOnly) {
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const selelt = part.findObject(this.reshapeObjectName);
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if (selelt instanceof go.Shape && selelt.geometry !== null &&
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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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let 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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const geo = selelt.geometry;
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const b = geo.bounds;
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// update the size of the adornment
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const body = adornment.findObject('BODY');
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if (body !== null)
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body.desiredSize = b.size;
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adornment.elements.each(function (h) {
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if (h._typ === undefined)
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return;
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const fig = geo.figures.elt(h._fig);
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const seg = fig.segments.elt(h._seg);
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let x = 0;
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let y = 0;
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switch (h._typ) {
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case 0:
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x = fig.startX;
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y = fig.startY;
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break;
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case 1:
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x = seg.endX;
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y = seg.endY;
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break;
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case 2:
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x = seg.point1X;
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y = seg.point1Y;
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break;
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case 3:
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x = seg.point2X;
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y = seg.point2Y;
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break;
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}
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h.alignment = new go.Spot(0, 0, x - b.x, y - b.y);
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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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* @hidden @internal
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*/
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makeAdornment(selelt) {
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const 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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let h = 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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const geo = selelt.geometry;
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if (geo !== null) {
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// requires Path Geometry, checked above in updateAdornments
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for (let f = 0; f < geo.figures.count; f++) {
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const fig = geo.figures.elt(f);
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for (let g = 0; g < fig.segments.count; g++) {
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const seg = fig.segments.elt(g);
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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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}
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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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* @hidden @internal
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*/
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makeHandle(selelt, fig, seg) {
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const h = this.handleArchetype;
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if (h === null)
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return null;
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return h.copy();
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}
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/**
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* This tool may run when there is a mouse-down event on a reshape handle.
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*/
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canStart() {
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if (!this.isEnabled)
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return false;
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const diagram = this.diagram;
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if (diagram.isReadOnly)
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return false;
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if (!diagram.allowReshape)
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return false;
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if (!diagram.lastInput.left)
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return false;
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const 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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* Start reshaping, if {@link #findToolHandleAt} finds a reshape handle at the mouse down point.
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*
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* If successful this sets {@link #handle} to be the reshape handle that it finds
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* and {@link #adornedShape} to be the {@link Shape} being reshaped.
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* It also remembers the original geometry in case this tool is cancelled.
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* And it starts a transaction.
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*/
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doActivate() {
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const diagram = this.diagram;
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this._handle = this.findToolHandleAt(diagram.firstInput.documentPoint, this.name);
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if (this._handle === null)
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return;
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const shape = this._handle.part.adornedObject;
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if (!shape)
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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 stops the current reshaping operation with the Shape as it is.
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*/
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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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const diagram = this.diagram;
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diagram.isMouseCaptured = false;
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this.isActive = false;
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}
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/**
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* Restore the shape to be the original geometry and stop this tool.
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*/
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doCancel() {
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const 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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* Call {@link #reshape} with a new point determined by the mouse
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* to change the geometry of the {@link #adornedShape}.
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*/
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doMouseMove() {
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const diagram = this.diagram;
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if (this.isActive) {
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const 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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* Reshape the Shape's geometry with a point based on the most recent mouse point by calling {@link #reshape},
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* and then stop this tool.
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*/
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doMouseUp() {
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const diagram = this.diagram;
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if (this.isActive) {
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const 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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* Change the geometry of the {@link #adornedShape} by moving the point corresponding to the current
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* {@link #handle} to be at the given {@link Point}.
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* This is called by {@link #doMouseMove} and {@link #doMouseUp} with the result of calling
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* {@link #computeReshape} to constrain the input point.
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* @param {Point} newPoint the value of the call to {@link #computeReshape}.
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*/
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reshape(newPoint) {
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const shape = this.adornedShape;
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if (shape === null || shape.geometry === null)
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return;
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const locpt = shape.getLocalPoint(newPoint);
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const geo = shape.geometry.copy();
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const type = this.handle._typ;
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if (type === undefined)
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return;
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const fig = geo.figures.elt(this.handle._fig);
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const seg = fig.segments.elt(this.handle._seg);
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switch (type) {
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case 0:
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fig.startX = locpt.x;
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fig.startY = locpt.y;
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break;
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case 1:
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seg.endX = locpt.x;
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seg.endY = locpt.y;
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break;
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case 2:
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seg.point1X = locpt.x;
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seg.point1Y = locpt.y;
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break;
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case 3:
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seg.point2X = locpt.x;
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seg.point2Y = locpt.y;
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break;
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}
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const offset = geo.normalize(); // avoid any negative coordinates in the geometry
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shape.desiredSize = new go.Size(NaN, NaN); // clear the desiredSize so Geometry can determine size
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shape.geometry = geo; // modify the Shape
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const part = shape.part; // move the Part holding the Shape
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if (part === null)
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return;
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part.ensureBounds();
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if (part.locationObject !== shape && !part.locationSpot.equals(go.Spot.Center)) { // but only if the locationSpot isn't Center
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// support the whole Node being rotated
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part.move(part.position.copy().subtract(offset.rotate(part.angle)));
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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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* This is called by {@link #doMouseMove} and {@link #doMouseUp} to limit the input point
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* before calling {@link #reshape}.
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* By default, this doesn't limit the input point.
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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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computeReshape(p) {
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return p; // no constraints on the points
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}
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}
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