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      1 /*
      2  * Copyright (C) 2013 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 
     17 package com.android.gallery3d.filtershow.imageshow;
     18 
     19 import android.content.Context;
     20 import android.graphics.Canvas;
     21 import android.graphics.Matrix;
     22 import android.util.AttributeSet;
     23 import android.util.Log;
     24 import android.view.MotionEvent;
     25 
     26 import com.android.gallery3d.filtershow.editors.EditorVignette;
     27 import com.android.gallery3d.filtershow.filters.FilterVignetteRepresentation;
     28 
     29 public class ImageVignette extends ImageShow {
     30     private static final String LOGTAG = "ImageVignette";
     31 
     32     private FilterVignetteRepresentation mVignetteRep;
     33     private EditorVignette mEditorVignette;
     34 
     35     private int mActiveHandle = -1;
     36 
     37     EclipseControl mElipse;
     38 
     39     public ImageVignette(Context context) {
     40         super(context);
     41         mElipse = new EclipseControl(context);
     42     }
     43 
     44     public ImageVignette(Context context, AttributeSet attrs) {
     45         super(context, attrs);
     46         mElipse = new EclipseControl(context);
     47     }
     48 
     49     @Override
     50     public boolean onTouchEvent(MotionEvent event) {
     51         int mask = event.getActionMasked();
     52         if (mActiveHandle == -1) {
     53             if (MotionEvent.ACTION_DOWN != mask) {
     54                 return super.onTouchEvent(event);
     55             }
     56             if (event.getPointerCount() == 1) {
     57                 mActiveHandle = mElipse.getCloseHandle(event.getX(), event.getY());
     58             }
     59             if (mActiveHandle == -1) {
     60                 return super.onTouchEvent(event);
     61             }
     62         } else {
     63             switch (mask) {
     64                 case MotionEvent.ACTION_UP:
     65                     mActiveHandle = -1;
     66                     break;
     67                 case MotionEvent.ACTION_DOWN:
     68                     break;
     69             }
     70         }
     71         float x = event.getX();
     72         float y = event.getY();
     73 
     74         mElipse.setScrToImageMatrix(getScreenToImageMatrix(true));
     75 
     76         boolean didComputeEllipses = false;
     77         switch (mask) {
     78             case (MotionEvent.ACTION_DOWN):
     79                 mElipse.actionDown(x, y, mVignetteRep);
     80                 break;
     81             case (MotionEvent.ACTION_UP):
     82             case (MotionEvent.ACTION_MOVE):
     83                 mElipse.actionMove(mActiveHandle, x, y, mVignetteRep);
     84                 setRepresentation(mVignetteRep);
     85                 didComputeEllipses = true;
     86                 break;
     87         }
     88         if (!didComputeEllipses) {
     89             computeEllipses();
     90         }
     91         invalidate();
     92         return true;
     93     }
     94 
     95     public void setRepresentation(FilterVignetteRepresentation vignetteRep) {
     96         mVignetteRep = vignetteRep;
     97         computeEllipses();
     98     }
     99 
    100     public void computeEllipses() {
    101         if (mVignetteRep == null) {
    102             return;
    103         }
    104         Matrix toImg = getScreenToImageMatrix(false);
    105         Matrix toScr = new Matrix();
    106         toImg.invert(toScr);
    107 
    108         float[] c = new float[] {
    109                 mVignetteRep.getCenterX(), mVignetteRep.getCenterY() };
    110         if (Float.isNaN(c[0])) {
    111             float cx = mImageLoader.getOriginalBounds().width() / 2;
    112             float cy = mImageLoader.getOriginalBounds().height() / 2;
    113             float rx = Math.min(cx, cy) * .8f;
    114             float ry = rx;
    115             mVignetteRep.setCenter(cx, cy);
    116             mVignetteRep.setRadius(rx, ry);
    117 
    118             c[0] = cx;
    119             c[1] = cy;
    120             toScr.mapPoints(c);
    121             if (getWidth() != 0) {
    122                 mElipse.setCenter(c[0], c[1]);
    123                 mElipse.setRadius(c[0] * 0.8f, c[1] * 0.8f);
    124             }
    125         } else {
    126 
    127             toScr.mapPoints(c);
    128 
    129             mElipse.setCenter(c[0], c[1]);
    130             mElipse.setRadius(toScr.mapRadius(mVignetteRep.getRadiusX()),
    131                     toScr.mapRadius(mVignetteRep.getRadiusY()));
    132         }
    133         mEditorVignette.commitLocalRepresentation();
    134     }
    135 
    136     public void setEditor(EditorVignette editorVignette) {
    137         mEditorVignette = editorVignette;
    138     }
    139 
    140     @Override
    141     public void onSizeChanged(int w, int h, int oldw, int oldh) {
    142         super.onSizeChanged(w,  h, oldw, oldh);
    143         computeEllipses();
    144     }
    145 
    146     @Override
    147     public void onDraw(Canvas canvas) {
    148         super.onDraw(canvas);
    149         if (mVignetteRep == null) {
    150             return;
    151         }
    152         Matrix toImg = getScreenToImageMatrix(false);
    153         Matrix toScr = new Matrix();
    154         toImg.invert(toScr);
    155         float[] c = new float[] {
    156                 mVignetteRep.getCenterX(), mVignetteRep.getCenterY() };
    157         toScr.mapPoints(c);
    158         mElipse.setCenter(c[0], c[1]);
    159         mElipse.setRadius(toScr.mapRadius(mVignetteRep.getRadiusX()),
    160                 toScr.mapRadius(mVignetteRep.getRadiusY()));
    161 
    162         mElipse.draw(canvas);
    163     }
    164 
    165 }
    166