186 lines
5.4 KiB
Java
186 lines
5.4 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.ui.widget;
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import android.animation.ValueAnimator;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.RectF;
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import android.support.annotation.Nullable;
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import android.util.AttributeSet;
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import android.view.View;
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public class ConnectionStatusView extends View {
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private static final int ARC_COUNT = 3;
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public static final int COLOR_CONNECTED = 0xff394baf;
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public static final int COLOR_DISCONNECTED = 0xffcccccc;
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private Arc[] arcs;
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private ValueAnimator[] animators;
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private boolean isConnected = false;
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public ConnectionStatusView(Context context) {
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super(context);
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}
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public ConnectionStatusView(Context context, @Nullable AttributeSet attrs) {
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super(context, attrs);
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}
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public ConnectionStatusView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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@Override
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protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
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super.onLayout(changed, left, top, right, bottom);
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initializeObjects();
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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final int measuredWidth = resolveSize(150, widthMeasureSpec);
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final int measuredHeight = resolveSize(150, heightMeasureSpec);
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setMeasuredDimension(measuredWidth, measuredHeight);
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}
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@Override
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public void onDraw(Canvas canvas) {
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for (int i = 0; i < ARC_COUNT; i++) {
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Arc arc = arcs[i];
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canvas.drawArc(arc.oval, 225, 90, false, arc.paint);
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}
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if (isConnected != isAnimationInitiated()) {
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resetAnimations();
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}
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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cancelAnimations();
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}
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public void setConnected(boolean isConnected) {
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this.isConnected = isConnected;
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if (arcs != null) {
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for (int i = 0; i < ARC_COUNT; i++) {
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arcs[i].paint.setColor(isConnected ? COLOR_CONNECTED : COLOR_DISCONNECTED);
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}
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}
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invalidate();
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}
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private void resetAnimations() {
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if (isConnected != isAnimationInitiated()) {
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post(new Runnable() {
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@Override
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public void run() {
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if (isConnected) {
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setupAnimations();
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} else {
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cancelAnimations();
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}
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}
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});
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}
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}
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private boolean isAnimationInitiated() {
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return animators != null;
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}
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private void setupAnimations() {
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if (isAnimationInitiated()) {
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return;
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}
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animators = new ValueAnimator[ARC_COUNT];
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for (int i = 0; i < ARC_COUNT; i++) {
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final int index = i;
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ValueAnimator animator = ValueAnimator.ofInt(100, 255, 100);
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animator.setRepeatCount(ValueAnimator.INFINITE);
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animator.setDuration(2000);
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animator.setStartDelay(i * 300);
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animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
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@Override
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public void onAnimationUpdate(ValueAnimator animation) {
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arcs[index].paint.setAlpha((int) animation.getAnimatedValue());
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invalidate();
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}
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});
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animator.start();
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animators[i] = animator;
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}
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}
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private void cancelAnimations() {
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if (!isAnimationInitiated()) {
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return;
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}
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for (int i = 0; i < ARC_COUNT; i++) {
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animators[i].cancel();
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}
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animators = null;
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}
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private void initializeObjects() {
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int width = getWidth();
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int height = getHeight();
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float centerX = width / 2.0f;
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float centerY = height / 2.0f;
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float r = Math.min(width, height) / 2f;
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arcs = new Arc[ARC_COUNT];
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for (int i = 0; i < ARC_COUNT; i++) {
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Paint paint = new Paint();
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paint.setAntiAlias(true);
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paint.setStyle(Paint.Style.STROKE);
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paint.setStrokeWidth(r / 10f);
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paint.setColor(isConnected ? COLOR_CONNECTED : COLOR_DISCONNECTED);
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float d = r / 4 + i * r / 4;
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RectF oval = new RectF(centerX - d, centerY - d + r / 3, centerX + d, centerY + d + r / 3);
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arcs[i] = new Arc(paint, oval);
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}
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}
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private static class Arc {
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private final Paint paint;
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private final RectF oval;
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Arc(Paint paint, RectF oval) {
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this.paint = paint;
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this.oval = oval;
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}
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}
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} |