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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.Canvas;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import com.android.launcher3.R;
/**
* 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 RectF mDstRectF = new RectF();
private final int mBadgeMargin;
private Drawable mDrawable;
public WidgetImageView(Context context) {
this(context, null);
}
public WidgetImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public WidgetImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mBadgeMargin = context.getResources()
.getDimensionPixelSize(R.dimen.profile_badge_margin);
}
/** Set the drawable to use for this view. */
public void setDrawable(Drawable drawable) {
mDrawable = drawable;
invalidate();
}
public Drawable getDrawable() {
return mDrawable;
}
@Override
protected void onDraw(Canvas canvas) {
if (mDrawable != null) {
updateDstRectF();
mDrawable.setBounds(getBitmapBounds());
mDrawable.draw(canvas);
}
}
/**
* Prevents the inefficient alpha view rendering.
*/
@Override
public boolean hasOverlappingRendering() {
return false;
}
private void updateDstRectF() {
float myWidth = getWidth();
float myHeight = getHeight();
float bitmapWidth = mDrawable.getIntrinsicWidth();
final float scale = bitmapWidth > myWidth ? myWidth / bitmapWidth : 1;
float scaledWidth = bitmapWidth * scale;
float scaledHeight = mDrawable.getIntrinsicHeight() * scale;
mDstRectF.left = (myWidth - scaledWidth) / 2;
mDstRectF.right = (myWidth + scaledWidth) / 2;
if (scaledHeight > myHeight) {
mDstRectF.top = 0;
mDstRectF.bottom = scaledHeight;
} else {
mDstRectF.top = (myHeight - scaledHeight) / 2;
mDstRectF.bottom = (myHeight + scaledHeight) / 2;
}
}
/**
* @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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