/*
* Copyright (c) 2014 OpenSilk Productions LLC
*
* 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.opensilk.common.ui.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.support.v4.util.LruCache;
import android.util.AttributeSet;
import android.widget.ImageButton;
import org.opensilk.common.core.util.VersionUtils;
import org.opensilk.common.ui.R;
/**
* Allows tinting drawables on API < 21
*
* Created by drew on 10/26/14.
*/
public class TintImageButton extends ImageButton {
private static final ColorFilterLruCache COLOR_FILTER_CACHE = new ColorFilterLruCache(6);
static final PorterDuff.Mode TINT_MODE = PorterDuff.Mode.SRC_IN;
public TintImageButton(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TintImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (VersionUtils.hasApi21()) return;
if (attrs == null) return;
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.TintImageButton, defStyleAttr, 0);
if (a == null) return;
if (a.hasValue(R.styleable.TintImageButton_tibTint)) {
final int color = a.getColor(R.styleable.TintImageButton_tibTint, 0);
if (color != 0) {
// XXX From AOSP see TintManager
// First, lets see if the cache already contains the color filter
PorterDuffColorFilter filter = COLOR_FILTER_CACHE.get(color, TINT_MODE);
if (filter == null) {
// Cache miss, so create a color filter and add it to the cache
filter = new PorterDuffColorFilter(color, TINT_MODE);
COLOR_FILTER_CACHE.put(color, TINT_MODE, filter);
}
// Finally set the color filter
getDrawable().mutate().setColorFilter(filter);
}
}
a.recycle();
}
private static class ColorFilterLruCache extends LruCache<Integer, PorterDuffColorFilter> {
public ColorFilterLruCache(int maxSize) {
super(maxSize);
}
PorterDuffColorFilter get(int color, PorterDuff.Mode mode) {
return get(generateCacheKey(color, mode));
}
PorterDuffColorFilter put(int color, PorterDuff.Mode mode, PorterDuffColorFilter filter) {
return put(generateCacheKey(color, mode), filter);
}
private static int generateCacheKey(int color, PorterDuff.Mode mode) {
int hashCode = 1;
hashCode = 31 * hashCode + color;
hashCode = 31 * hashCode + mode.hashCode();
return hashCode;
}
}
}