src/org/lineageos/eleven/widgets/AudioButton.java


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package com.cyanogenmod.eleven.widgets;

import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.ImageButton;

import com.cyanogenmod.eleven.R;
import com.cyanogenmod.eleven.utils.ApolloUtils;

public abstract class AudioButton extends ImageButton implements OnClickListener, OnLongClickListener {
    public static float ACTIVE_ALPHA = 1.0f;
    public static float INACTIVE_ALPHA = 0.4f;

    @SuppressWarnings("deprecation")
    public AudioButton(final Context context, final AttributeSet attrs) {
        super(context, attrs);
        setPadding(0, 0, 0, 0);
        setBackground(getResources().getDrawable(R.drawable.selectable_background));
        // Control playback (cycle shuffle)
        setOnClickListener(this);
        // Show the cheat sheet
        setOnLongClickListener(this);
    }

    @Override
    public boolean onLongClick(final View view) {
        if (TextUtils.isEmpty(view.getContentDescription())) {
            return false;
        } else {
            ApolloUtils.showCheatSheet(view);
            return true;
        }
    }
}