de.vanita5.twittnuker.view.ProfileImageBannerLayout.java Source code

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Here is the source code for de.vanita5.twittnuker.view.ProfileImageBannerLayout.java

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/*
 * Twittnuker - Twitter client for Android
 *
 * Copyright (C) 2013-2014 vanita5 <mail@vanita5.de>
 *
 * This program incorporates a modified version of Twidere.
 * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.vanita5.twittnuker.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.FrameLayout;
import android.widget.ImageView;

public class ProfileImageBannerLayout extends ExtendedFrameLayout {

    public static final int VIEW_ID_PROFILE_IMAGE = 0x10000001;
    public static final int VIEW_ID_PROFILE_BANNER = 0x10000002;

    private static final double PROFILE_IMAGE_WIDTH_FACTOR = 0.1425;
    private static final double PROFILE_IMAGE_TOP_MARGIN_FACTOR = 0.0875;

    private final int mBorderWidth;
    private final ImageView mProfileBannerImageView;
    private final ProfileImageView mProfileImageView;

    public ProfileImageBannerLayout(final Context context) {
        this(context, null);
    }

    public ProfileImageBannerLayout(final Context context, final AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ProfileImageBannerLayout(final Context context, final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);
        mBorderWidth = (int) (getResources().getDisplayMetrics().density * 2);
        mProfileBannerImageView = new ProfileBannerImageView(context);
        mProfileBannerImageView.setId(VIEW_ID_PROFILE_BANNER);
        addView(mProfileBannerImageView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
        mProfileImageView = new ProfileImageViewInternal(context, mBorderWidth);
        mProfileImageView.setId(VIEW_ID_PROFILE_IMAGE);
        addView(mProfileImageView,
                new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER_HORIZONTAL));
    }

    public ImageView getProfileBannerImageView() {
        return mProfileBannerImageView;
    }

    public ProfileImageView getProfileImageView() {
        return mProfileImageView;
    }

    @Override
    protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
        final int width = MeasureSpec.getSize(widthMeasureSpec), height = width / 2;
        setMeasuredDimension(width, height);
        super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
        if (width > 0) {
            final int profile_size = (int) (width * PROFILE_IMAGE_WIDTH_FACTOR);
            final LayoutParams profile_lp = (FrameLayout.LayoutParams) mProfileImageView.getLayoutParams();
            profile_lp.width = profile_size + mBorderWidth * 2;
            profile_lp.height = profile_size + mBorderWidth * 2;
            profile_lp.gravity = Gravity.TOP | Gravity.CENTER_HORIZONTAL;
            profile_lp.topMargin = (int) (height * PROFILE_IMAGE_TOP_MARGIN_FACTOR) - mBorderWidth;
            mProfileImageView.setLayoutParams(profile_lp);
        }
    }

    private static class ProfileImageViewInternal extends ProfileImageView {

        private final Paint mWhitePaint, mBlackPaint;
        private final int mPaddings;

        private ProfileImageViewInternal(final Context context, final int padding) {
            super(context, null, 0);
            ViewCompat.setLayerType(this, LAYER_TYPE_SOFTWARE, null);
            mWhitePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
            mWhitePaint.setColor(Color.WHITE);
            mBlackPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
            mBlackPaint.setColor(Color.BLACK);
            mPaddings = padding;
            setPadding(padding, padding, padding, padding);
        }

        @Override
        protected void onDraw(final Canvas canvas) {
            canvas.drawColor(Color.WHITE);
            final int width = getWidth(), height = getHeight();
            if (width > 0 && height > 0) {
                canvas.drawRect(mPaddings, mPaddings, width - mPaddings, height - mPaddings, mBlackPaint);
                canvas.drawRect(mPaddings / 2, mPaddings / 2, width - mPaddings / 2, height - mPaddings / 2,
                        mWhitePaint);
            }
            super.onDraw(canvas);
        }
    }
}