NativeScript/nativescript-core/ui/layouts/absolute-layout/absolute-layout.android.ts

import { AbsoluteLayoutBase, View, leftProperty, topProperty, Length } from "./absolute-layout-common";

export * from "./absolute-layout-common";

function makeNativeSetter<T>(setter: (this: View, lp: org.nativescript.widgets.CommonLayoutParams, value: T) => void) {
    return function (this: View, value: T) {
        const nativeView: android.view.View = this.nativeViewProtected;
        const lp = nativeView.getLayoutParams() || new org.nativescript.widgets.CommonLayoutParams();
        if (lp instanceof org.nativescript.widgets.CommonLayoutParams) {
            setter.call(this, lp, value);
            nativeView.setLayoutParams(lp);
        }
    };
}

View.prototype[topProperty.setNative] = makeNativeSetter<number>(function (this: View, lp, value) { lp.top = Length.toDevicePixels(value, 0); });
View.prototype[leftProperty.setNative] = makeNativeSetter<number>(function (this: View, lp, value) { lp.left = Length.toDevicePixels(value, 0); });

export class AbsoluteLayout extends AbsoluteLayoutBase {
    nativeViewProtected: org.nativescript.widgets.AbsoluteLayout;

    public createNativeView() {
        return new org.nativescript.widgets.AbsoluteLayout(this._context);
    }
}