ImageVignette.java revision fc7d46515db7a3a50f7416c2462030609391cf95 
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
17package com.android.gallery3d.filtershow.imageshow;
18
19import android.content.Context;
20import android.graphics.Canvas;
21import android.graphics.Matrix;
22import android.util.AttributeSet;
23import android.util.Log;
24import android.view.MotionEvent;
25
26import com.android.gallery3d.filtershow.editors.EditorVignette;
27import com.android.gallery3d.filtershow.filters.FilterVignetteRepresentation;
28
29public 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                    if (event.getPointerCount() == 1) {
69                        Log.v(LOGTAG, "################### ACTION_DOWN odd " + mActiveHandle
70                                + " touches=1");
71                    }
72                    break;
73            }
74        }
75        float x = event.getX();
76        float y = event.getY();
77
78        mElipse.setScrToImageMatrix(getScreenToImageMatrix(true));
79
80        switch (mask) {
81            case (MotionEvent.ACTION_DOWN):
82                mElipse.actionDown(x, y, mVignetteRep);
83                break;
84            case (MotionEvent.ACTION_UP):
85            case (MotionEvent.ACTION_MOVE):
86
87                mElipse.actionMove(mActiveHandle, x, y, mVignetteRep);
88                setRepresentation(mVignetteRep);
89                break;
90        }
91        computeEllipses();
92        invalidate();
93        return true;
94    }
95
96    public void setRepresentation(FilterVignetteRepresentation vignetteRep) {
97        mVignetteRep = vignetteRep;
98        computeEllipses();
99    }
100
101    public void computeEllipses() {
102        if (mVignetteRep == null) {
103            return;
104        }
105        Matrix toImg = getScreenToImageMatrix(false);
106        Matrix toScr = new Matrix();
107        toImg.invert(toScr);
108
109        float[] c = new float[] {
110                mVignetteRep.getCenterX(), mVignetteRep.getCenterY() };
111        if (Float.isNaN(c[0])) {
112            float cx = mImageLoader.getOriginalBounds().width() / 2;
113            float cy = mImageLoader.getOriginalBounds().height() / 2;
114            float rx = Math.min(cx, cy) * .8f;
115            float ry = rx;
116            mVignetteRep.setCenter(cx, cy);
117            mVignetteRep.setRadius(rx, ry);
118
119            c[0] = cx;
120            c[1] = cy;
121            toScr.mapPoints(c);
122            if (getWidth() != 0) {
123                mElipse.setCenter(c[0], c[1]);
124                mElipse.setRadius(c[0] * 0.8f, c[1] * 0.8f);
125            }
126        } else {
127
128            toScr.mapPoints(c);
129
130            mElipse.setCenter(c[0], c[1]);
131            mElipse.setRadius(toScr.mapRadius(mVignetteRep.getRadiusX()),
132                    toScr.mapRadius(mVignetteRep.getRadiusY()));
133        }
134        mEditorVignette.commitLocalRepresentation();
135    }
136
137    public void setEditor(EditorVignette editorVignette) {
138        mEditorVignette = editorVignette;
139    }
140
141    @Override
142    public void onSizeChanged(int w, int h, int oldw, int oldh) {
143        super.onSizeChanged(w,  h, oldw, oldh);
144        computeEllipses();
145    }
146
147    @Override
148    public void onDraw(Canvas canvas) {
149        super.onDraw(canvas);
150        if (mVignetteRep == null) {
151            return;
152        }
153        Matrix toImg = getScreenToImageMatrix(false);
154        Matrix toScr = new Matrix();
155        toImg.invert(toScr);
156        float[] c = new float[] {
157                mVignetteRep.getCenterX(), mVignetteRep.getCenterY() };
158        toScr.mapPoints(c);
159        mElipse.setCenter(c[0], c[1]);
160        mElipse.setRadius(toScr.mapRadius(mVignetteRep.getRadiusX()),
161                toScr.mapRadius(mVignetteRep.getRadiusY()));
162
163        mElipse.draw(canvas);
164    }
165
166}
167