/*
 *  Copyright 1998-2025 by Northwoods Software Corporation. All Rights Reserved.
 */
/*
 * This is an extension and not part of the main GoJS library.
 * The source code for this is at extensionsJSM/OverviewResizingTool.ts.
 * 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 extensionsJSM folders.
 * See the Extensions intro page (https://gojs.net/latest/intro/extensions.html) for more information.
 */

/**
 * The OverviewResizingTool class lets the user resize the box within an overview.
 *
 * If you want to experiment with this extension, try the <a href="../../samples/OverviewResizing.html">Overview Resizing</a> sample.
 * @category Tool Extension
 */
class OverviewResizingTool extends go.ResizingTool {
    /**
     * Constructs an OverviewResizingTool and sets the name for the tool.
     */
    constructor(init) {
        super();
        this.name = 'OverviewResizing';
        this._handleSize = new go.Size(6, 6);
        if (init)
            Object.assign(this, init);
    }
    /**
     * @hidden @internal
     * @param resizeBox
     */
    makeAdornment(resizeBox) {
        this._handleSize.setTo(resizeBox.strokeWidth * 3, resizeBox.strokeWidth * 3);
        // Set up the resize adornment
        const ad = new go.Adornment();
        ad.type = go.Panel.Spot;
        ad.locationSpot = go.Spot.Center;
        const ph = new go.Placeholder();
        ph.isPanelMain = true;
        ad.add(ph);
        const hnd = new go.Shape();
        hnd.name = 'RSZHND';
        hnd.figure = 'Rectangle';
        hnd.desiredSize = this._handleSize;
        hnd.cursor = 'se-resize';
        hnd.alignment = go.Spot.BottomRight;
        hnd.alignmentFocus = go.Spot.Center;
        ad.add(hnd);
        ad.adornedObject = resizeBox;
        return ad;
    }
    /**
     * @hidden @internal
     * Keep the resize handle properly sized as the scale is changing.
     * This overrides an undocumented method on the ResizingTool.
     * @param elt
     * @param angle
     */
    updateResizeHandles(elt, angle) {
        if (elt === null)
            return;
        const handle = elt.findObject('RSZHND');
        const box = elt.adornedObject;
        this._handleSize.setTo(box.strokeWidth * 3, box.strokeWidth * 3);
        handle.desiredSize = this._handleSize;
    }
    /**
     * Overrides {@link go.ResizingTool.resize} to resize the overview box via setting the observed diagram's scale.
     * @param newr - the intended new rectangular bounds the overview box.
     */
    resize(newr) {
        const overview = this.diagram;
        const observed = overview.observed;
        if (observed === null)
            return;
        const oldr = observed.viewportBounds.copy();
        const oldscale = observed.scale;
        if (oldr.width !== newr.width || oldr.height !== newr.height) {
            if (newr.width > 0 && newr.height > 0) {
                observed.scale = Math.min((oldscale * oldr.width) / newr.width, (oldscale * oldr.height) / newr.height);
            }
        }
    }
}