/*
* Copyright (C) 2014 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 android.support.v7.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Shader;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ClipDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.RoundRectShape;
import android.graphics.drawable.shapes.Shape;
import android.support.v4.graphics.drawable.DrawableWrapper;
import android.support.v4.view.ViewCompat;
import android.support.v7.appcompat.R;
import android.support.v7.internal.widget.TintManager;
import android.support.v7.internal.widget.TintTypedArray;
import android.util.AttributeSet;
import android.view.Gravity;
import android.widget.RatingBar;
/**
* A {@link RatingBar} which supports compatible features on older version of the platform.
*
* <p>This will automatically be used when you use {@link RatingBar} in your layouts.
* You should only need to manually use this class when writing custom views.</p>
*/
public class AppCompatRatingBar extends RatingBar {
private static final int[] TINT_ATTRS = {
android.R.attr.indeterminateDrawable,
android.R.attr.progressDrawable
};
private Bitmap mSampleTile;
public AppCompatRatingBar(Context context) {
this(context, null);
}
public AppCompatRatingBar(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.ratingBarStyle);
}
public AppCompatRatingBar(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (TintManager.SHOULD_BE_USED) {
TintTypedArray a = TintTypedArray.obtainStyledAttributes(getContext(), attrs,
TINT_ATTRS, defStyleAttr, 0);
Drawable drawable = a.getDrawableIfKnown(0);
if (drawable != null) {
setIndeterminateDrawable(tileifyIndeterminate(drawable));
}
drawable = a.getDrawableIfKnown(1);
if (drawable != null) {
setProgressDrawable(tileify(drawable, false));
}
a.recycle();
}
}
/**
* Converts a drawable to a tiled version of itself. It will recursively
* traverse layer and state list drawables.
*/
private Drawable tileify(Drawable drawable, boolean clip) {
if (drawable instanceof DrawableWrapper) {
Drawable inner = ((DrawableWrapper) drawable).getWrappedDrawable();
if (inner != null) {
inner = tileify(inner, clip);
((DrawableWrapper) drawable).setWrappedDrawable(inner);
}
} else if (drawable instanceof LayerDrawable) {
LayerDrawable background = (LayerDrawable) drawable;
final int N = background.getNumberOfLayers();
Drawable[] outDrawables = new Drawable[N];
for (int i = 0; i < N; i++) {
int id = background.getId(i);
outDrawables[i] = tileify(background.getDrawable(i),
(id == android.R.id.progress || id == android.R.id.secondaryProgress));
}
LayerDrawable newBg = new LayerDrawable(outDrawables);
for (int i = 0; i < N; i++) {
newBg.setId(i, background.getId(i));
}
return newBg;
} else if (drawable instanceof BitmapDrawable) {
final Bitmap tileBitmap = ((BitmapDrawable) drawable).getBitmap();
if (mSampleTile == null) {
mSampleTile = tileBitmap;
}
final ShapeDrawable shapeDrawable = new ShapeDrawable(getDrawableShape());
final BitmapShader bitmapShader = new BitmapShader(tileBitmap,
Shader.TileMode.REPEAT, Shader.TileMode.CLAMP);
shapeDrawable.getPaint().setShader(bitmapShader);
return (clip) ? new ClipDrawable(shapeDrawable, Gravity.LEFT,
ClipDrawable.HORIZONTAL) : shapeDrawable;
}
return drawable;
}
/**
* Convert a AnimationDrawable for use as a barberpole animation.
* Each frame of the animation is wrapped in a ClipDrawable and
* given a tiling BitmapShader.
*/
private Drawable tileifyIndeterminate(Drawable drawable) {
if (drawable instanceof AnimationDrawable) {
AnimationDrawable background = (AnimationDrawable) drawable;
final int N = background.getNumberOfFrames();
AnimationDrawable newBg = new AnimationDrawable();
newBg.setOneShot(background.isOneShot());
for (int i = 0; i < N; i++) {
Drawable frame = tileify(background.getFrame(i), true);
frame.setLevel(10000);
newBg.addFrame(frame, background.getDuration(i));
}
newBg.setLevel(10000);
drawable = newBg;
}
return drawable;
}
private Shape getDrawableShape() {
final float[] roundedCorners = new float[] { 5, 5, 5, 5, 5, 5, 5, 5 };
return new RoundRectShape(roundedCorners, null, null);
}
@Override
protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (mSampleTile != null) {
final int width = mSampleTile.getWidth() * getNumStars();
setMeasuredDimension(ViewCompat.resolveSizeAndState(width, widthMeasureSpec, 0),
getMeasuredHeight());
}
}
}