Class View

src/coord/View.ts:228–330

* [VIEW_COORD_SYS] * * @final [NOTICE] Inheritance of this class is not recommended. Use composition instead.

 * @final [NOTICE] Inheritance of this class is not recommended. Use composition instead.
 */
class View extends Transformable implements CoordinateSystemMaster, CoordinateSystem {

    readonly type: string = VIEW_COORD_SYS_TYPE;

    static dimensions = ['x', 'y'];
    readonly dimensions = ['x', 'y'];

    constructor(
        invertY?: boolean,
        legacyCenterBase?: ViewInner['lgCt'],
        legacyGeo?: Transformable
    ) {
        super();
        const viewInner = inner(this);

        viewInner.invertY = invertY;

        viewInner.lgCt = legacyCenterBase;
        viewInner.lgGeo = legacyGeo;

        const trans: ViewInner['trans'] = viewInner.trans = [];
        trans[VIEW_COORD_SYS_TRANS_RAW] = transformableCreate();
        trans[VIEW_COORD_SYS_TRANS_ROAM] = transformableCreate();
        trans[VIEW_COORD_SYS_TRANS_OVERALL] = transformableCreate();

        viewInner.mtRaw = matrixCreate();
        viewInner.mtRawInv = matrixCreate();
        viewInner.mtOverall = matrixCreate();
        viewInner.mtOverallInv = matrixCreate();

        viewInner.zoom = 1;
    }

    /**
     * @implements CoordinateSystem['getBoundingRect']
     * @see VIEW_COORD_SYS_TRANS_RAW
     *
     * This is a rect in data space.
     * For historicall reason, the name is `getBoundingRect` - preserve it for backward compatibility.
     */
    getBoundingRect(): BoundingRect {
        return viewCoordSysCopyBoundingRect(null, this);
    }

    /**
     * @implements CoordinateSystem['getViewRect']
     * @see VIEW_COORD_SYS_TRANS_RAW
     */
    getViewRect(): BoundingRect {
        return viewCoordSysCopyViewRect(null, this);
    }

    /**
     * @implements CoordinateSystem['getRoamTransform']
     */
    getRoamTransform(): MatrixArray {
        return transformableGetLocalTransform(inner(this).trans[VIEW_COORD_SYS_TRANS_ROAM]);
    }