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/*
* Copyright (C) 2011 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.android.launcher3.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
/**
* View that draws a bitmap horizontally centered. If the image width is greater than the view
* width, the image is scaled down appropriately.
*/
public class WidgetImageView extends View {
private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
private final RectF mDstRectF = new RectF();
private Bitmap mBitmap;
public WidgetImageView(Context context) {
super(context);
}
public WidgetImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public WidgetImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setBitmap(Bitmap bitmap) {
mBitmap = bitmap;
invalidate();
}
public Bitmap getBitmap() {
return mBitmap;
}
@Override
protected void onDraw(Canvas canvas) {
if (mBitmap != null) {
updateDstRectF();
canvas.drawBitmap(mBitmap, null, mDstRectF, mPaint);
}
}
/**
* Prevents the inefficient alpha view rendering.
*/
@Override
public boolean hasOverlappingRendering() {
return false;
}
private void updateDstRectF() {
if (mBitmap.getWidth() > getWidth()) {
float scale = ((float) getWidth()) / mBitmap.getWidth();
mDstRectF.set(0, 0, getWidth(), scale * mBitmap.getHeight());
} else {
mDstRectF.set(
(getWidth() - mBitmap.getWidth()) * 0.5f,
0,
(getWidth() + mBitmap.getWidth()) * 0.5f,
mBitmap.getHeight());
}
}
/**
* @return the bounds where the image was drawn.
*/
public Rect getBitmapBounds() {
updateDstRectF();
Rect rect = new Rect();
mDstRectF.round(rect);
return rect;
}
}
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