NativeScript/nativescript-core/ui/activity-indicator/index.android.ts

import {
	ActivityIndicatorBase,
	busyProperty,
} from "./activity-indicator-common";
import {
	colorProperty,
	visibilityProperty,
	Visibility,
} from "../styling/style-properties";
import { Color } from "../../color";

export * from "./activity-indicator-common";

export class ActivityIndicator extends ActivityIndicatorBase {
	nativeViewProtected: android.widget.ProgressBar;

	public createNativeView() {
		const progressBar = new android.widget.ProgressBar(this._context);
		progressBar.setVisibility(android.view.View.INVISIBLE);
		progressBar.setIndeterminate(true);

		return progressBar;
	}

	[busyProperty.getDefault](): boolean {
		return false;
	}
	[busyProperty.setNative](value: boolean) {
		if (this.visibility === Visibility.VISIBLE) {
			this.nativeViewProtected.setVisibility(
				value ? android.view.View.VISIBLE : android.view.View.INVISIBLE
			);
		}
	}

	[visibilityProperty.getDefault](): Visibility {
		return Visibility.HIDDEN;
	}
	[visibilityProperty.setNative](value: Visibility) {
		switch (value) {
			case Visibility.VISIBLE:
				this.nativeViewProtected.setVisibility(
					this.busy
						? android.view.View.VISIBLE
						: android.view.View.INVISIBLE
				);
				break;
			case Visibility.HIDDEN:
				this.nativeViewProtected.setVisibility(
					android.view.View.INVISIBLE
				);
				break;
			case Visibility.COLLAPSE:
				this.nativeViewProtected.setVisibility(android.view.View.GONE);
				break;
			default:
				throw new Error(
					`Invalid visibility value: ${value}. Valid values are: "${Visibility.VISIBLE}", "${Visibility.HIDDEN}", "${Visibility.COLLAPSE}".`
				);
		}
	}

	[colorProperty.getDefault](): number {
		return -1;
	}
	[colorProperty.setNative](value: number | Color) {
		if (value instanceof Color) {
			this.nativeViewProtected
				.getIndeterminateDrawable()
				.setColorFilter(
					value.android,
					android.graphics.PorterDuff.Mode.SRC_IN
				);
		} else {
			this.nativeViewProtected
				.getIndeterminateDrawable()
				.clearColorFilter();
		}
	}
}