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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.camera.panorama;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.RectF;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
class CaptureView extends View {
private static final String TAG = "CaptureView";
private Canvas mCanvas;
private Bitmap mCanvasBitmap;
private String mStatusText = "";
private int mStartAngle = 0;
private int mSweepAngle = 0;
private int mWidth;
private int mHeight;
private Bitmap mBitmap = null;
private Matrix mM = null;
private Matrix mMLast = null;
private final Paint mPaint = new Paint();
// Origin of the coordinate for appending a new alpha bitmap.
// mCanvasBitmap is 2000x2000, but the origin is set to (800, 800).
// All the alpha bitmaps grow from this origin.
float mAlphaOriginX;
float mAlphaOriginY;
public CaptureView(Context context, AttributeSet attrs) {
super(context, attrs);
mM = new Matrix();
mMLast = new Matrix();
mMLast.reset();
mPaint.setStyle(Paint.Style.FILL);
mPaint.setColor(Color.RED);
mPaint.setAntiAlias(true);
mPaint.setTextSize(40);
mPaint.setTypeface(Typeface.create((Typeface) null, Typeface.BOLD));
mPaint.setTextAlign(Align.CENTER);
}
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
if (mCanvasBitmap != null) {
mCanvasBitmap.recycle();
}
Log.v(TAG, "onSizeChanged: W = " + w + ", H = " + h);
// TODO: 2000x2000 is a temporary setting from SRI's code. Should be fixed once the code is
// refactored.
mCanvasBitmap = Bitmap.createBitmap(2000, 2000, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas();
mCanvas.setBitmap(mCanvasBitmap);
mAlphaOriginX = mCanvasBitmap.getWidth() * 0.4f;
mAlphaOriginY = mCanvasBitmap.getHeight() * 0.4f;
}
public void destroy() {
if (mCanvasBitmap != null) {
mCanvasBitmap.recycle();
}
}
public void setStartAngle(int angle) {
mStartAngle = angle;
}
public void setSweepAngle(int angle) {
mSweepAngle = angle;
}
public void setStatusText(String text) {
mStatusText = text;
}
public void setBitmap(Bitmap bitmap, Matrix m) {
mBitmap = bitmap;
mM = m;
}
public void setBitmap(Bitmap bitmap) {
mBitmap = bitmap;
}
@Override
protected void onDraw(Canvas canvas) {
mWidth = getWidth();
mHeight = getHeight();
// Draw bitmaps according to the calculated panorama transformation.
if (mBitmap != null) {
mM.postTranslate(mAlphaOriginX, mAlphaOriginY);
mCanvas.drawBitmap(mBitmap, mM, mPaint);
Matrix mInverse = mM;
mM.invert(mInverse);
mInverse.postTranslate(mWidth / 2 - mBitmap.getWidth() / 2,
mHeight / 2 - mBitmap.getHeight() / 2);
canvas.drawBitmap(mCanvasBitmap, mInverse, mPaint);
RectF rect = new RectF(mWidth / 2 - 100, 3 * mHeight / 4,
mWidth / 2 + 100, 3 * mHeight / 4 + 200);
canvas.drawText(mStatusText, mWidth / 2, mHeight / 2, mPaint);
canvas.drawArc(rect, -90 + mStartAngle, mSweepAngle, true, mPaint);
canvas.drawArc(rect, -90 - mStartAngle, mSweepAngle > 0 ? 2 : 0, true, mPaint);
}
}
}
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