1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.contacts.detail; 17 18 import android.content.Context; 19 import android.graphics.Canvas; 20 import android.graphics.Matrix; 21 import android.util.AttributeSet; 22 import android.widget.ImageView; 23 24 /** 25 * Extension to ImageView that handles cropping during resize animations. 26 */ 27 public class TransformableImageView extends ImageView { 28 29 public TransformableImageView(Context context) { 30 super(context); 31 } 32 33 public TransformableImageView(Context context, AttributeSet attrs) { 34 super(context, attrs); 35 } 36 37 public TransformableImageView(Context context, AttributeSet attrs, int defStyle) { 38 super(context, attrs, defStyle); 39 } 40 41 @Override 42 protected void onDraw(Canvas canvas) { 43 int saveCount = canvas.getSaveCount(); 44 canvas.save(); 45 canvas.translate(mPaddingLeft, mPaddingTop); 46 Matrix drawMatrix = new Matrix(); 47 int dwidth = getDrawable().getIntrinsicWidth(); 48 int dheight = getDrawable().getIntrinsicHeight(); 49 50 int vwidth = getWidth() - mPaddingLeft - mPaddingRight; 51 int vheight = getHeight() - mPaddingTop - mPaddingBottom; 52 float scale; 53 float dx = 0, dy = 0; 54 55 if (dwidth * vheight > vwidth * dheight) { 56 scale = (float) vheight / (float) dheight; 57 dx = (vwidth - dwidth * scale) * 0.5f; 58 } else { 59 scale = (float) vwidth / (float) dwidth; 60 dy = (vheight - dheight * scale) * 0.5f; 61 } 62 63 drawMatrix.setScale(scale, scale); 64 drawMatrix.postTranslate((int) (dx + 0.5f), (int) (dy + 0.5f)); 65 canvas.concat(drawMatrix); 66 getDrawable().draw(canvas); 67 canvas.restoreToCount(saveCount); 68 } 69 } 70
