Twidere-App-Android-Twitter-Mastodon/twidere/src/main/java/org/mariotaku/twidere/view/HomeActionButton.java

/*
 * 				Twidere - Twitter client for Android
 * 
 *  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 org.mariotaku.twidere.view;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Build;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.util.Property;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;

import org.mariotaku.twidere.R;
import org.mariotaku.twidere.activity.iface.IThemedActivity;
import org.mariotaku.twidere.util.ThemeUtils;
import org.mariotaku.twidere.util.support.ViewSupport;
import org.mariotaku.twidere.util.support.graphics.OutlineCompat;
import org.mariotaku.twidere.util.support.view.ViewOutlineProviderCompat;
import org.mariotaku.twidere.view.iface.IHomeActionButton;

import me.uucky.colorpicker.internal.EffectViewHelper;

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class HomeActionButton extends FrameLayout implements IHomeActionButton {

    private static class PressElevationProperty extends Property<View, Float> {
        private final float mElevation;

        public PressElevationProperty(float elevation) {
            super(Float.TYPE, null);
            mElevation = elevation;
        }

        @Override
        public void set(View object, Float value) {
            ViewCompat.setTranslationZ(object, mElevation * value);
        }

        @Override
        public Float get(View object) {
            return ViewCompat.getTranslationZ(object) / mElevation;
        }
    }

    private final EffectViewHelper mHelper;
    private final ImageView mIconView;

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

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

    public HomeActionButton(final Context context, final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);
        final Resources resources = context.getResources();
        final float elevation = resources.getDisplayMetrics().density * 4;
        mHelper = new EffectViewHelper(this, new PressElevationProperty(elevation), 200);
        if (isInEditMode()) {
            inflate(context, R.layout.action_item_home_actions, this);
        } else if (context instanceof IThemedActivity) {
            int themeResourceId = ((IThemedActivity) context).getCurrentThemeResourceId();
            int themeColor = ((IThemedActivity) context).getCurrentThemeColor();
            inflate(ThemeUtils.getActionBarThemedContext(context, themeResourceId, themeColor),
                    R.layout.action_item_home_actions, this);
        } else {
            inflate(ThemeUtils.getActionBarThemedContext(context), R.layout.action_item_home_actions,
                    this);
        }
        mIconView = (ImageView) findViewById(android.R.id.icon);
        ViewSupport.setOutlineProvider(this, new HomeActionButtonOutlineProvider());
        setClipToOutline(true);
        setButtonColor(Color.WHITE);
    }

    @Override
    public void setButtonColor(int color) {
        if (isInEditMode()) {
            final ShapeDrawable sd = new ShapeDrawable(new OvalShape());
            sd.getPaint().setColor(color);
            ViewSupport.setBackground(this, sd);
        } else {
            ViewSupport.setBackground(this, new ColorDrawable(color));
        }
    }

    @Override
    public void setIcon(final Bitmap bm) {
        mIconView.setImageBitmap(bm);
    }

    @Override
    public void setIcon(final Drawable drawable) {
        mIconView.setImageDrawable(drawable);
    }

    @Override
    public void setIcon(final int resId) {
        mIconView.setImageResource(resId);
    }

    @Override
    public void setIconColor(int color, Mode mode) {
        mIconView.setColorFilter(color, mode);
    }

    @Override
    public void setTitle(final CharSequence title) {
        setContentDescription(title);
    }

    @Override
    public void setTitle(final int title) {
        setTitle(getResources().getText(title));
    }

    @Override
    public void setPressed(boolean pressed) {
        super.setPressed(pressed);
        mHelper.setState(pressed);
    }

    private static class HomeActionButtonOutlineProvider extends ViewOutlineProviderCompat {

        @Override
        public void getOutline(View view, OutlineCompat outline) {
            final int width = view.getWidth(), height = view.getHeight();
            final int size = Math.min(width, height);
            final int left = (width - size) / 2, top = (height - size) / 2;
            outline.setOval(left, top, left + size, top + size);
        }
    }


}