medsurf-draw/dist/lib/interactions/ZoomInteraction.js

Draw annotations on jpg/zoomify images, based on PIXI.js

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
import * as PIXI from "pixi.js-legacy";
import { BaseElementInteraction } from "../bases/interactions/BaseElementInteraction";
var ZoomInteraction = (function (_super) {
    __extends(ZoomInteraction, _super);
    function ZoomInteraction(element, active) {
        if (active === void 0) { active = true; }
        var _this = _super.call(this, element) || this;
        _this._zoomStep = 0.05;
        _this._active = active;
        return _this;
    }
    ZoomInteraction.prototype.reset = function () {
        this._spriteX = 0;
        this._spriteY = 0;
    };
    ZoomInteraction.prototype.getGraphCoordinates = function (x, y) {
        this._spriteX = x;
        this._spriteY = y;
        return PIXI.InteractionData.prototype.getLocalPosition.call({ global: { x: this._spriteX, y: this._spriteY } }, this.element);
    };
    ZoomInteraction.prototype.onZoom = function (event) {
        if (!this._active) {
            return;
        }
        var direction = (event.deltaY < 0) ? 1 : -1;
        var factor = (1 + direction * this._zoomStep);
        this.emit("onZoom", event, event.clientX, event.clientY, factor);
    };
    Object.defineProperty(ZoomInteraction.prototype, "active", {
        get: function () {
            return this._active;
        },
        set: function (value) {
            this._active = value;
        },
        enumerable: false,
        configurable: true
    });
    return ZoomInteraction;
}(BaseElementInteraction));
export { ZoomInteraction };
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