packages/SystemUI/src/com/android/keyguard/LockIconView.java

/*
 * Copyright (C) 2020 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;

import android.content.Context;
import android.content.res.ColorStateList;
import android.graphics.PointF;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;

import androidx.annotation.NonNull;

import com.android.settingslib.Utils;
import com.android.systemui.Dumpable;
import com.android.systemui.R;

import java.io.FileDescriptor;
import java.io.PrintWriter;

/**
 * A view positioned under the notification shade.
 */
public class LockIconView extends FrameLayout implements Dumpable {
    @NonNull private final RectF mSensorRect;
    @NonNull private PointF mLockIconCenter = new PointF(0f, 0f);
    private int mRadius;

    private ImageView mLockIcon;
    private ImageView mBgView;

    private int mLockIconColor;

    public LockIconView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mSensorRect = new RectF();
    }

    @Override
    public void onFinishInflate() {
        super.onFinishInflate();
        mLockIcon = findViewById(R.id.lock_icon);
        mBgView = findViewById(R.id.lock_icon_bg);
    }

    void updateColorAndBackgroundVisibility(boolean useBackground) {
        if (useBackground && mLockIcon.getDrawable() != null) {
            mLockIconColor = Utils.getColorAttrDefaultColor(getContext(),
                    android.R.attr.textColorPrimary);
            mBgView.setBackground(getContext().getDrawable(R.drawable.fingerprint_bg));
            mBgView.setVisibility(View.VISIBLE);
        } else {
            mLockIconColor = Utils.getColorAttrDefaultColor(getContext(),
                    R.attr.wallpaperTextColorAccent);
            mBgView.setVisibility(View.GONE);
        }

        mLockIcon.setImageTintList(ColorStateList.valueOf(mLockIconColor));
    }

    void setImageDrawable(Drawable drawable) {
        mLockIcon.setImageDrawable(drawable);
        if (drawable == null) {
            mBgView.setVisibility(View.INVISIBLE);
        } else {
            mBgView.setVisibility(View.VISIBLE);
        }
    }

    public void setCenterLocation(@NonNull PointF center, int radius) {
        mLockIconCenter = center;
        mRadius = radius;

        // mSensorProps coordinates assume portrait mode which is OK b/c the keyguard is always in
        // portrait.
        mSensorRect.set(mLockIconCenter.x - mRadius,
                mLockIconCenter.y - mRadius,
                mLockIconCenter.x + mRadius,
                mLockIconCenter.y + mRadius);

        final FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
        lp.width = (int) (mSensorRect.right - mSensorRect.left);
        lp.height = (int) (mSensorRect.bottom - mSensorRect.top);
        lp.topMargin = (int) mSensorRect.top;
        lp.setMarginStart((int) mSensorRect.left);
        setLayoutParams(lp);
    }

    @Override
    public boolean hasOverlappingRendering() {
        return false;
    }

    float getLocationTop() {
        return mLockIconCenter.y - mRadius;
    }

    @Override
    public void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter pw, @NonNull String[] args) {
        pw.println("Center in px (x, y)= (" + mLockIconCenter.x + ", " + mLockIconCenter.y + ")");
        pw.println("Radius in pixels: " + mRadius);
        pw.println("topLeft= (" + getX() + ", " + getY() + ")");
    }
}