The Tor Browser / file comparison
comparison: mobile/android/base/widget/ThumbnailView.java
mobile/android/base/widget/ThumbnailView.java
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
equal
deleted
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replaced
| -1:000000000000 | 0:f5cd61bb4f2c |
|---|---|
| 1 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*- | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 4 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 package org.mozilla.gecko.widget; | |
| 7 | |
| 8 import android.content.Context; | |
| 9 import android.graphics.Canvas; | |
| 10 import android.graphics.Matrix; | |
| 11 import android.graphics.drawable.Drawable; | |
| 12 import android.util.AttributeSet; | |
| 13 import android.widget.ImageView; | |
| 14 | |
| 15 /* Special version of ImageView for thumbnails. Scales a thumbnail so that it maintains its aspect | |
| 16 * ratio and so that the images width and height are the same size or greater than the view size | |
| 17 */ | |
| 18 public class ThumbnailView extends ImageView { | |
| 19 private static final String LOGTAG = "GeckoThumbnailView"; | |
| 20 final private Matrix mMatrix; | |
| 21 private int mWidthSpec = -1; | |
| 22 private int mHeightSpec = -1; | |
| 23 private boolean mLayoutChanged; | |
| 24 | |
| 25 public ThumbnailView(Context context, AttributeSet attrs) { | |
| 26 super(context, attrs); | |
| 27 mMatrix = new Matrix(); | |
| 28 mLayoutChanged = true; | |
| 29 } | |
| 30 | |
| 31 @Override | |
| 32 public void onDraw(Canvas canvas) { | |
| 33 Drawable d = getDrawable(); | |
| 34 if (mLayoutChanged) { | |
| 35 int w1 = d.getIntrinsicWidth(); | |
| 36 int h1 = d.getIntrinsicHeight(); | |
| 37 int w2 = getWidth(); | |
| 38 int h2 = getHeight(); | |
| 39 | |
| 40 float scale = (w2/h2 < w1/h1) ? (float)h2/h1 : (float)w2/w1; | |
| 41 mMatrix.setScale(scale, scale); | |
| 42 } | |
| 43 | |
| 44 int saveCount = canvas.save(); | |
| 45 canvas.concat(mMatrix); | |
| 46 d.draw(canvas); | |
| 47 canvas.restoreToCount(saveCount); | |
| 48 } | |
| 49 | |
| 50 @Override | |
| 51 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { | |
| 52 // OnLayout.changed isn't a reliable measure of whether or not the size of this view has changed | |
| 53 // neither is onSizeChanged called often enough. Instead, we track changes in size ourselves, and | |
| 54 // only invalidate this matrix if we have a new width/height spec | |
| 55 if (widthMeasureSpec != mWidthSpec || heightMeasureSpec != mHeightSpec) { | |
| 56 mWidthSpec = widthMeasureSpec; | |
| 57 mHeightSpec = heightMeasureSpec; | |
| 58 mLayoutChanged = true; | |
| 59 } | |
| 60 super.onMeasure(widthMeasureSpec, heightMeasureSpec); | |
| 61 } | |
| 62 } |
