@nativescript-community/ui-zoomimage/index.android.js

Zoomable image view based on @nativescript-community/ui-image

export * from './index-common';
import { ZoomImageBase, maxZoomScaleProperty, minZoomScaleProperty, zoomScaleProperty } from './index-common';
export class ZoomImg extends ZoomImageBase {
    createNativeView() {
        return new com.nativescript.image.ZoomableMatrixImageView(this._context);
    }
    initNativeView() {
        super.initNativeView();
        // Set up TouchImageView zoom listener
        const owner = new WeakRef(this);
        // TouchImageView has setOnTouchImageViewListener
        this.nativeViewProtected.setOnZoomChangeListener(new com.nativescript.image.ZoomableMatrixImageView.OnZoomChangeListener({
            onZoomChanged(zoom) {
                const instance = owner.get();
                if (instance) {
                    instance.notifyZoomChanged(zoom);
                }
            }
        }));
    }
    disposeNativeView() {
        this.nativeViewProtected.setOnZoomChangeListener(null);
        // Clean up
        // if (this.nativeViewProtected) {
        //     this.nativeViewProtected.setOnTouchImageViewListener(null);
        // }
        super.disposeNativeView();
    }
    updateImageUri() {
        // Prevent zoom reset when updating image URI
        if (this.nativeViewProtected) {
            this.nativeViewProtected.setIgnoreNextReset(true);
        }
        return super.updateImageUri();
    }
    [zoomScaleProperty.setNative](scale) {
        this.nativeViewProtected?.zoomTo(scale, false);
    }
    setZoom(scale, animated = true, point = { x: 0, y: 0 }) {
        if (this.nativeViewProtected) {
            if (point.x === 0 && point.y === 0) {
                // Zoom to center
                this.nativeViewProtected.zoomTo(scale, animated);
            }
            else {
                // Zoom to specific point
                this.nativeViewProtected.zoomToPoint(scale, point.x, point.y, animated, null);
            }
        }
    }
    getZoom() {
        if (this.nativeViewProtected) {
            return this.nativeViewProtected.getZoom();
        }
        return 1.0;
    }
    [minZoomScaleProperty.setNative](scale) {
        if (this.nativeViewProtected) {
            this.nativeViewProtected.setMinZoom(scale);
        }
    }
    [maxZoomScaleProperty.setNative](scale) {
        if (this.nativeViewProtected) {
            this.nativeViewProtected.setMaxZoom(scale);
        }
    }
    notifyZoomChanged(scale) {
        const eventName = 'zoomChanged';
        if (this.hasListeners(eventName)) {
            this.notify({
                eventName,
                object: this,
                scale
            });
        }
    }
}
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