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/*
* 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.keyguard.clock;
import static com.android.systemui.doze.util.BurnInHelperKt.getBurnInOffset;
import android.content.Context;
import android.content.res.Resources;
import android.util.AttributeSet;
import android.util.MathUtils;
import android.view.View;
import android.widget.FrameLayout;
import com.android.systemui.R;
/**
* Positions clock faces (analog, digital, typographic) and handles pixel shifting
* to prevent screen burn-in.
*/
public class ClockLayout extends FrameLayout {
private static final int ANALOG_CLOCK_SHIFT_FACTOR = 3;
/**
* Clock face views.
*/
private View mAnalogClock;
/**
* Pixel shifting amplitudes used to prevent screen burn-in.
*/
private int mBurnInPreventionOffsetX;
private int mBurnInPreventionOffsetY;
private float mDarkAmount;
public ClockLayout(Context context) {
this(context, null);
}
public ClockLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ClockLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mAnalogClock = findViewById(R.id.analog_clock);
// Get pixel shifting X, Y amplitudes from resources.
Resources resources = getResources();
mBurnInPreventionOffsetX = resources.getDimensionPixelSize(
R.dimen.burn_in_prevention_offset_x);
mBurnInPreventionOffsetY = resources.getDimensionPixelSize(
R.dimen.burn_in_prevention_offset_y);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
positionChildren();
}
void onTimeChanged() {
positionChildren();
}
/**
* See {@link com.android.systemui.plugins.ClockPlugin#setDarkAmount(float)}.
*/
void setDarkAmount(float darkAmount) {
mDarkAmount = darkAmount;
positionChildren();
}
private void positionChildren() {
final float offsetX = MathUtils.lerp(0f,
getBurnInOffset(mBurnInPreventionOffsetX * 2, true) - mBurnInPreventionOffsetX,
mDarkAmount);
final float offsetY = MathUtils.lerp(0f,
getBurnInOffset(mBurnInPreventionOffsetY * 2, false)
- 0.5f * mBurnInPreventionOffsetY,
mDarkAmount);
// Put the analog clock in the middle of the screen.
if (mAnalogClock != null) {
mAnalogClock.setX(Math.max(0f, 0.5f * (getWidth() - mAnalogClock.getWidth()))
+ ANALOG_CLOCK_SHIFT_FACTOR * offsetX);
mAnalogClock.setY(Math.max(0f, 0.5f * (getHeight() - mAnalogClock.getHeight()))
+ ANALOG_CLOCK_SHIFT_FACTOR * offsetY);
}
}
}
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