content: /*
   * 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.graphics.drawable.Drawable;
  import android.util.AttributeSet;
  import android.view.View;
  
  import com.android.launcher3.R;
  import com.android.launcher3.Utilities;
  
  /**
   * 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 final int mBadgeMargin;
  
      private Bitmap mBitmap;
      private Drawable mBadge;
  
      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);
      }
  
      public void setBitmap(Bitmap bitmap, Drawable badge) {
          mBitmap = bitmap;
          mBadge = badge;
          invalidate();
      }
  
      public Bitmap getBitmap() {
          return mBitmap;
      }
  
      @Override
      protected void onDraw(Canvas canvas) {
          if (mBitmap != null) {
              updateDstRectF();
              canvas.drawBitmap(mBitmap, null, mDstRectF, mPaint);
  
              // Only draw the badge if a preview was drawn.
              if (mBadge != null) {
                  mBadge.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 = mBitmap.getWidth();
  
          final float scale = bitmapWidth > myWidth ? myWidth / bitmapWidth : 1;
          float scaledWidth = bitmapWidth * scale;
          float scaledHeight = mBitmap.getHeight() * 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;
          }
  
          if (mBadge != null) {
              Rect bounds = mBadge.getBounds();
              int left = Utilities.boundToRange(
                      (int) (mDstRectF.right + mBadgeMargin - bounds.width()),
                      mBadgeMargin, getWidth() - bounds.width());
              int top = Utilities.boundToRange(
                      (int) (mDstRectF.bottom + mBadgeMargin - bounds.height()),
                      mBadgeMargin, getHeight() - bounds.height());
              mBadge.setBounds(left, top, bounds.width() + left, bounds.height() + top);
          }
      }
  
      /**
       * @return the bounds where the image was drawn.
       */
      public Rect getBitmapBounds() {
          updateDstRectF();
          Rect rect = new Rect();
          mDstRectF.round(rect);
          return rect;
      }
  }
  