gojs/extensionsJSM/ResizeMultipleTool.js

/*
*  Copyright (C) 1998-2021 by Northwoods Software Corporation. All Rights Reserved.
*/
/*
* This is an extension and not part of the main GoJS library.
* Note that the API for this class may change with any version, even point releases.
* If you intend to use an extension in production, you should copy the code to your own source directory.
* Extensions can be found in the GoJS kit under the extensions or extensionsTS folders.
* See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
*/
import * as go from '../release/go-module.js';
/**
 * The ResizeMultipleTool class lets the user resize multiple objects at once.
 *
 * If you want to experiment with this extension, try the <a href="../../extensionsJSM/ResizeMultiple.html">Resize Multiple</a> sample.
 * @category Tool Extension
 */
export class ResizeMultipleTool extends go.ResizingTool {
    /**
     * Constructs a ResizeMultipleTool and sets the name for the tool.
     */
    constructor() {
        super();
        this.name = 'ResizeMultiple';
    }
    /**
     * Overrides {@link ResizingTool#resize} to resize all selected objects to the same size.
     * @param {Rect} newr the intended new rectangular bounds for each Part's {@link Part#resizeObject}.
     */
    resize(newr) {
        const diagram = this.diagram;
        diagram.selection.each(function (part) {
            if (part instanceof go.Link)
                return; // only Nodes and simple Parts
            const obj = part.resizeObject;
            // calculate new location
            const pos = part.position.copy();
            const angle = obj.getDocumentAngle();
            const sc = obj.getDocumentScale();
            const radAngle = Math.PI * angle / 180;
            const angleCos = Math.cos(radAngle);
            const angleSin = Math.sin(radAngle);
            const deltaWidth = newr.width - obj.naturalBounds.width;
            const deltaHeight = newr.height - obj.naturalBounds.height;
            const angleRight = (angle > 270 || angle < 90) ? 1 : 0;
            const angleBottom = (angle > 0 && angle < 180) ? 1 : 0;
            const angleLeft = (angle > 90 && angle < 270) ? 1 : 0;
            const angleTop = (angle > 180 && angle < 360) ? 1 : 0;
            pos.x += sc * ((newr.x + deltaWidth * angleLeft) * angleCos - (newr.y + deltaHeight * angleBottom) * angleSin);
            pos.y += sc * ((newr.x + deltaWidth * angleTop) * angleSin + (newr.y + deltaHeight * angleLeft) * angleCos);
            obj.desiredSize = newr.size;
            part.position = pos;
        });
    }
}