1ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin/* 2ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * Copyright (C) 2009 The Android Open Source Project 3ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * 4ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * Licensed under the Apache License, Version 2.0 (the "License"); 5ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * you may not use this file except in compliance with the License. 6ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * You may obtain a copy of the License at 7ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * 8ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * http://www.apache.org/licenses/LICENSE-2.0 9ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * 10ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * Unless required by applicable law or agreed to in writing, software 11ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * distributed under the License is distributed on an "AS IS" BASIS, 12ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * See the License for the specific language governing permissions and 14ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin * limitations under the License. 15ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin */ 16ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin 17ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Linpackage com.android.camera; 18ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin 19ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Linimport android.content.Context; 2064f9e54b860d158f8317bce7d4e8b6af5cbcfbabPin Tingimport android.content.res.Configuration; 21ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Linimport android.util.AttributeSet; 22892781804513066b68b4a2fa6f846e862dac252aOwen Linimport android.view.View; 2359ddc8c1add2fcffe523e3877baad1b6cc5ba2fbChung-yih Wangimport android.widget.RelativeLayout; 24ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang 25271b3095b9f763421c0547109da9de774795072dChih-Chung Chang/** 2602ec7c0880ded5863d73d6f173ef35ab5c888dcdWu-cheng Li * A layout which handles the preview aspect ratio. 27271b3095b9f763421c0547109da9de774795072dChih-Chung Chang */ 2859ddc8c1add2fcffe523e3877baad1b6cc5ba2fbChung-yih Wangpublic class PreviewFrameLayout extends RelativeLayout { 29271b3095b9f763421c0547109da9de774795072dChih-Chung Chang /** A callback to be invoked when the preview frame's size changes. */ 301f0564eb75f20943d496109928b5542902d3bd61Wei-Ta Chen public interface OnSizeChangedListener { 3114eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li public void onSizeChanged(int width, int height); 321f0564eb75f20943d496109928b5542902d3bd61Wei-Ta Chen } 331f0564eb75f20943d496109928b5542902d3bd61Wei-Ta Chen 344c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li private double mAspectRatio; 35ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang private View mBorder; 3614eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li private OnSizeChangedListener mListener; 376988d4e2ef8d14d8bf3ee81c8eb3175bbf1b88ecOwen Lin 38ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin public PreviewFrameLayout(Context context, AttributeSet attrs) { 39ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin super(context, attrs); 404c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li setAspectRatio(4.0 / 3.0); 41ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } 42ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin 43913f3784d368a5e11fee5d5db2c355ef832685daWu-cheng Li @Override 44ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang protected void onFinishInflate() { 45ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang mBorder = findViewById(R.id.preview_border); 46ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang } 47ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang 48ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin public void setAspectRatio(double ratio) { 49ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin if (ratio <= 0.0) throw new IllegalArgumentException(); 504c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li 5164f9e54b860d158f8317bce7d4e8b6af5cbcfbabPin Ting if (getResources().getConfiguration().orientation 5264f9e54b860d158f8317bce7d4e8b6af5cbcfbabPin Ting == Configuration.ORIENTATION_PORTRAIT) { 534c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li ratio = 1 / ratio; 544c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li } 554c7b291018e08dbb4bc1712d95117a294fa1416cWu-cheng Li 56ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin if (mAspectRatio != ratio) { 57ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin mAspectRatio = ratio; 58ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin requestLayout(); 59ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } 60ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } 61ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin 62db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang public void showBorder(boolean enabled) { 63ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang mBorder.setVisibility(enabled ? View.VISIBLE : View.INVISIBLE); 64ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang } 65ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang 66ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang public void fadeOutBorder() { 67ec38f8b0e662f945738ce31c7f70eb67300f960eakahuang Util.fadeOut(mBorder); 68db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang } 69db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang 70ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin @Override 71db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang protected void onMeasure(int widthSpec, int heightSpec) { 72db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang int previewWidth = MeasureSpec.getSize(widthSpec); 73db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang int previewHeight = MeasureSpec.getSize(heightSpec); 74db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang 75db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang // Get the padding of the border background. 76a432c550acb06d2fea9f1d1f33055d914e0ee2bdWu-cheng Li int hPadding = getPaddingLeft() + getPaddingRight(); 77a432c550acb06d2fea9f1d1f33055d914e0ee2bdWu-cheng Li int vPadding = getPaddingTop() + getPaddingBottom(); 78db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang 79db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang // Resize the preview frame with correct aspect ratio. 80db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang previewWidth -= hPadding; 81db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang previewHeight -= vPadding; 82ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin if (previewWidth > previewHeight * mAspectRatio) { 83ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin previewWidth = (int) (previewHeight * mAspectRatio + .5); 84ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } else { 85ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin previewHeight = (int) (previewWidth / mAspectRatio + .5); 86ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } 876988d4e2ef8d14d8bf3ee81c8eb3175bbf1b88ecOwen Lin 88db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang // Add the padding of the border. 89db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang previewWidth += hPadding; 90db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang previewHeight += vPadding; 91940b813c57c6c6eb66f55d968c9cb2b28e79b24bWu-cheng Li 92db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang // Ask children to follow the new preview dimension. 93db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang super.onMeasure(MeasureSpec.makeMeasureSpec(previewWidth, MeasureSpec.EXACTLY), 94db3556078a75be0bd4a08195d90f060724034e88Chung-yih Wang MeasureSpec.makeMeasureSpec(previewHeight, MeasureSpec.EXACTLY)); 95ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin } 9614eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li 9714eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li public void setOnSizeChangedListener(OnSizeChangedListener listener) { 9814eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li mListener = listener; 9914eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li } 10014eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li 10114eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li @Override 10214eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li protected void onSizeChanged(int w, int h, int oldw, int oldh) { 10314eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li if (mListener != null) mListener.onSizeChanged(w, h); 10414eb2f01892cfe3945ecc4d431a7c134ded6ec17Wu-cheng Li } 105ffcca7403c9a364403357d3c76a3ff256c63c786Cheng-Ru Lin} 106