/*
* 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 com.hippo.drawable;
import android.annotation.TargetApi;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Outline;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.NonNull;
/**
* Very simple drawable that draws a rounded rectangle background with arbitrary corners and also
* reports proper outline for L.
* <p>
* Simpler and uses less resources compared to GradientDrawable or ShapeDrawable.
*/
public class RoundRectDrawable extends Drawable {
private float mRadius;
private final Paint mPaint;
private final RectF mBoundsF;
private final Rect mBoundsI;
public RoundRectDrawable(int backgroundColor, float radius) {
mRadius = radius;
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
mPaint.setColor(backgroundColor);
mBoundsF = new RectF();
mBoundsI = new Rect();
}
@Override
public void draw(Canvas canvas) {
canvas.drawRoundRect(mBoundsF, mRadius, mRadius, mPaint);
}
private void updateBounds(Rect bounds) {
if (bounds == null) {
bounds = getBounds();
}
mBoundsF.set(bounds.left, bounds.top, bounds.right, bounds.bottom);
mBoundsI.set(bounds);
}
@Override
protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
updateBounds(bounds);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
public void getOutline(@NonNull Outline outline) {
outline.setRoundRect(mBoundsI, mRadius);
}
void setRadius(float radius) {
if (radius == mRadius) {
return;
}
mRadius = radius;
updateBounds(null);
invalidateSelf();
}
@Override
public void setAlpha(int alpha) {
// not supported because older versions do not support
}
@Override
public void setColorFilter(ColorFilter cf) {
// not supported because older versions do not support
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
public float getRadius() {
return mRadius;
}
public void setColor(int color) {
mPaint.setColor(color);
invalidateSelf();
}
}