Bug: 146004827 Test: make RunSettingsRoboTests ROBOTEST_FILTER=BackGestureIndicatorViewTest Change-Id: Id8c01bf047138a1721237f368f269c6def964515
162 lines
5.1 KiB
Java
162 lines
5.1 KiB
Java
/*
|
|
* Copyright (C) 2019 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.android.settings.gestures;
|
|
|
|
import android.animation.TimeAnimator;
|
|
import android.annotation.IntRange;
|
|
import android.annotation.NonNull;
|
|
import android.annotation.Nullable;
|
|
import android.content.Context;
|
|
import android.graphics.Canvas;
|
|
import android.graphics.ColorFilter;
|
|
import android.graphics.Paint;
|
|
import android.graphics.Rect;
|
|
import android.graphics.drawable.Drawable;
|
|
import android.os.Handler;
|
|
import android.os.Looper;
|
|
import android.os.Message;
|
|
|
|
import com.android.internal.annotations.VisibleForTesting;
|
|
import com.android.settings.R;
|
|
|
|
/** A drawable to animate the inset back gesture in both edges of the screen */
|
|
public class BackGestureIndicatorDrawable extends Drawable {
|
|
|
|
private static final String TAG = "BackGestureIndicatorDrawable";
|
|
|
|
private static final int MSG_SET_INDICATOR_WIDTH = 1;
|
|
private static final int MSG_HIDE_INDICATOR = 3;
|
|
|
|
private static final long ANIMATION_DURATION_MS = 200L;
|
|
private static final long HIDE_DELAY_MS = 700L;
|
|
|
|
private static final int ALPHA_MAX = 64;
|
|
|
|
private Context mContext;
|
|
|
|
private Paint mPaint = new Paint();
|
|
private boolean mReversed;
|
|
|
|
private float mFinalWidth;
|
|
private float mCurrentWidth;
|
|
private float mWidthChangePerMs;
|
|
|
|
private TimeAnimator mTimeAnimator = new TimeAnimator();
|
|
|
|
private final Handler mHandler = new Handler(Looper.getMainLooper()) {
|
|
@Override
|
|
public void handleMessage(Message msg) {
|
|
switch(msg.what) {
|
|
case MSG_SET_INDICATOR_WIDTH:
|
|
mTimeAnimator.end();
|
|
mFinalWidth = msg.arg1;
|
|
mWidthChangePerMs = Math.abs(mCurrentWidth - mFinalWidth)
|
|
/ ANIMATION_DURATION_MS;
|
|
mTimeAnimator.start();
|
|
break;
|
|
case MSG_HIDE_INDICATOR:
|
|
mCurrentWidth = mFinalWidth;
|
|
removeMessages(MSG_SET_INDICATOR_WIDTH);
|
|
sendMessageDelayed(obtainMessage(MSG_SET_INDICATOR_WIDTH, 0, 0), HIDE_DELAY_MS);
|
|
invalidateSelf();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Creates an indicator drawable that responds to back gesture inset size change
|
|
* @param reversed If false, indicator will expand right. If true, indicator will expand left
|
|
*/
|
|
public BackGestureIndicatorDrawable(Context context, boolean reversed) {
|
|
mContext = context;
|
|
mReversed = reversed;
|
|
|
|
// Restart the timer whenever a change is detected, so we can shrink/fade the indicators
|
|
mTimeAnimator.setTimeListener((TimeAnimator animation, long totalTime, long deltaTime) -> {
|
|
updateCurrentWidth(totalTime, deltaTime);
|
|
invalidateSelf();
|
|
});
|
|
}
|
|
|
|
private void updateCurrentWidth(long totalTime, long deltaTime) {
|
|
synchronized (mTimeAnimator) {
|
|
float step = deltaTime * mWidthChangePerMs;
|
|
if (totalTime >= ANIMATION_DURATION_MS
|
|
|| step >= Math.abs(mFinalWidth - mCurrentWidth)) {
|
|
mCurrentWidth = mFinalWidth;
|
|
mTimeAnimator.end();
|
|
} else {
|
|
float direction = mCurrentWidth < mFinalWidth ? 1 : -1;
|
|
mCurrentWidth += direction * step;
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void draw(@NonNull Canvas canvas) {
|
|
|
|
mPaint.setAntiAlias(true);
|
|
mPaint.setColor(mContext.getResources().getColor(R.color.back_gesture_indicator));
|
|
mPaint.setAlpha(ALPHA_MAX);
|
|
|
|
final int top = 0;
|
|
final int bottom = canvas.getHeight();
|
|
final int width = (int) mCurrentWidth;
|
|
|
|
Rect rect = new Rect(0, top, width, bottom);
|
|
if (mReversed) {
|
|
rect.offset(canvas.getWidth() - width, 0);
|
|
}
|
|
|
|
canvas.drawRect(rect, mPaint);
|
|
}
|
|
|
|
@Override
|
|
public void setAlpha(@IntRange(from = 0, to = 255) int alpha) {
|
|
|
|
}
|
|
|
|
@Override
|
|
public void setColorFilter(@Nullable ColorFilter colorFilter) {
|
|
|
|
}
|
|
|
|
@Override
|
|
public int getOpacity() {
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Sets the visible width of the indicator in pixels.
|
|
*/
|
|
public void setWidth(int width) {
|
|
if (width == 0) {
|
|
mHandler.sendEmptyMessage(MSG_HIDE_INDICATOR);
|
|
} else {
|
|
mHandler.sendMessage(mHandler.obtainMessage(MSG_SET_INDICATOR_WIDTH, width, 0));
|
|
}
|
|
}
|
|
|
|
@VisibleForTesting
|
|
public int getWidth() {
|
|
return (int) mFinalWidth;
|
|
}
|
|
}
|