core/java/com/android/internal/widget/FaceUnlockView.java

/*
 * Copyright (C) 2012 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.internal.widget;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;

public class FaceUnlockView extends RelativeLayout {
    private static final String TAG = "FaceUnlockView";

    public FaceUnlockView(Context context) {
        this(context, null);
    }

    public FaceUnlockView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    private int resolveMeasured(int measureSpec, int desired)
    {
        int result = 0;
        int specSize = MeasureSpec.getSize(measureSpec);
        switch (MeasureSpec.getMode(measureSpec)) {
            case MeasureSpec.UNSPECIFIED:
                result = desired;
                break;
            case MeasureSpec.AT_MOST:
                result = Math.max(specSize, desired);
                break;
            case MeasureSpec.EXACTLY:
            default:
                result = specSize;
        }
        return result;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        final int minimumWidth = getSuggestedMinimumWidth();
        final int minimumHeight = getSuggestedMinimumHeight();
        int viewWidth = resolveMeasured(widthMeasureSpec, minimumWidth);
        int viewHeight = resolveMeasured(heightMeasureSpec, minimumHeight);

        final int chosenSize = Math.min(viewWidth, viewHeight);
        final int newWidthMeasureSpec =
                MeasureSpec.makeMeasureSpec(chosenSize, MeasureSpec.AT_MOST);
        final int newHeightMeasureSpec =
                MeasureSpec.makeMeasureSpec(chosenSize, MeasureSpec.AT_MOST);

        super.onMeasure(newWidthMeasureSpec, newHeightMeasureSpec);
    }
}