| 1 | /*
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| 2 | * Copyright (C) 1998-2021 by Northwoods Software Corporation. All Rights Reserved.
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| 3 | */
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| 4 | /*
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| 5 | * This is an extension and not part of the main GoJS library.
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| 6 | * Note that the API for this class may change with any version, even point releases.
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| 7 | * If you intend to use an extension in production, you should copy the code to your own source directory.
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| 8 | * Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
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| 9 | * See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
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| 10 | */
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| 11 | import * as go from '../release/go-module.js';
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| 12 | /**
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| 13 | * The OverviewResizingTool class lets the user resize the box within an overview.
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| 14 | *
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| 15 | * If you want to experiment with this extension, try the <a href="../../extensionsJSM/OverviewResizing.html">Overview Resizing</a> sample.
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| 16 | * @category Tool Extension
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| 17 | */
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| 18 | export class OverviewResizingTool extends go.ResizingTool {
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| 19 | /**
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| 20 | * Constructs an OverviewResizingTool and sets the name for the tool.
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| 21 | */
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| 22 | constructor() {
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| 23 | super();
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| 24 | this.name = 'OverviewResizing';
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| 25 | this._handleSize = new go.Size(6, 6);
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| 26 | }
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| 27 | /**
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| 28 | * @hidden @internal
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| 29 | * @param {Shape} resizeBox
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| 30 | * @return {Adornment}
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| 31 | */
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| 32 | makeAdornment(resizeBox) {
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| 33 | this._handleSize.setTo(resizeBox.strokeWidth * 3, resizeBox.strokeWidth * 3);
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| 34 | // Set up the resize adornment
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| 35 | const ad = new go.Adornment();
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| 36 | ad.type = go.Panel.Spot;
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| 37 | ad.locationSpot = go.Spot.Center;
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| 38 | const ph = new go.Placeholder();
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| 39 | ph.isPanelMain = true;
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| 40 | ad.add(ph);
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| 41 | const hnd = new go.Shape();
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| 42 | hnd.name = 'RSZHND';
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| 43 | hnd.figure = 'Rectangle';
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| 44 | hnd.desiredSize = this._handleSize;
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| 45 | hnd.cursor = 'se-resize';
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| 46 | hnd.alignment = go.Spot.BottomRight;
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| 47 | hnd.alignmentFocus = go.Spot.Center;
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| 48 | ad.add(hnd);
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| 49 | ad.adornedObject = resizeBox;
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| 50 | return ad;
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| 51 | }
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| 52 | /**
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| 53 | * @hidden @internal
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| 54 | * Keep the resize handle properly sized as the scale is changing.
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| 55 | * This overrides an undocumented method on the ResizingTool.
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| 56 | * @param {Adornment} elt
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| 57 | * @param {number} angle
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| 58 | */
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| 59 | updateResizeHandles(elt, angle) {
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| 60 | if (elt === null)
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| 61 | return;
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| 62 | const handle = elt.findObject('RSZHND');
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| 63 | const box = elt.adornedObject;
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| 64 | this._handleSize.setTo(box.strokeWidth * 3, box.strokeWidth * 3);
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| 65 | handle.desiredSize = this._handleSize;
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| 66 | }
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| 67 | /**
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| 68 | * Overrides {@link ResizingTool#resize} to resize the overview box via setting the observed diagram's scale.
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| 69 | * @param {Rect} newr the intended new rectangular bounds the overview box.
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| 70 | */
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| 71 | resize(newr) {
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| 72 | const overview = this.diagram;
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| 73 | const observed = overview.observed;
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| 74 | if (observed === null)
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| 75 | return;
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| 76 | const oldr = observed.viewportBounds.copy();
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| 77 | const oldscale = observed.scale;
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| 78 | if (oldr.width !== newr.width || oldr.height !== newr.height) {
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| 79 | if (newr.width > 0 && newr.height > 0) {
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| 80 | observed.scale = Math.min(oldscale * oldr.width / newr.width, oldscale * oldr.height / newr.height);
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| 81 | }
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| 82 | }
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| 83 | }
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| 84 | }
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