ImageShow.java revision bf93da72576b28f4e9dfb27f8f3fef702c8ae82d 
1
2package com.android.gallery3d.filtershow.imageshow;
3
4import com.android.gallery3d.filtershow.FilterShowActivity;
5import com.android.gallery3d.filtershow.HistoryAdapter;
6import com.android.gallery3d.filtershow.ImageStateAdapter;
7import com.android.gallery3d.filtershow.cache.ImageLoader;
8import com.android.gallery3d.filtershow.filters.ImageFilter;
9import com.android.gallery3d.filtershow.presets.ImagePreset;
10import com.android.gallery3d.filtershow.ui.SliderListener;
11import com.android.gallery3d.filtershow.ui.SliderController;
12import com.android.gallery3d.R;
13import com.android.gallery3d.R.id;
14import com.android.gallery3d.R.layout;
15
16import android.content.Context;
17import android.graphics.Bitmap;
18import android.graphics.Canvas;
19import android.graphics.Paint;
20import android.graphics.Rect;
21import android.net.Uri;
22import android.os.Handler;
23import android.os.Message;
24import android.util.AttributeSet;
25import android.util.Log;
26import android.view.MotionEvent;
27import android.view.View;
28import android.view.View.MeasureSpec;
29import android.widget.ArrayAdapter;
30
31public class ImageShow extends View implements SliderListener {
32
33    private static final String LOGTAG = "ImageShow";
34
35    protected Paint mPaint = new Paint();
36    private static int mTextSize = 24;
37    private static int mTextPadding = 20;
38
39    protected ImagePreset mImagePreset = null;
40    protected ImageLoader mImageLoader = null;
41    private ImageFilter mCurrentFilter = null;
42
43    private Bitmap mBackgroundImage = null;
44    protected Bitmap mForegroundImage = null;
45    protected Bitmap mFilteredImage = null;
46
47    protected SliderController mSliderController = new SliderController();
48
49    private HistoryAdapter mHistoryAdapter = null;
50    private ImageStateAdapter mImageStateAdapter = null;
51
52    protected Rect mImageBounds = null;
53    protected float mImageRotation = 0;
54    protected float mImageRotationZoomFactor = 0;
55
56    private boolean mShowControls = false;
57    private boolean mShowOriginal = false;
58    private String mToast = null;
59    private boolean mShowToast = false;
60    private boolean mImportantToast = false;
61
62    private Handler mHandler = new Handler();
63
64    public void onNewValue(int value) {
65        if (mCurrentFilter != null) {
66            mCurrentFilter.setParameter(value);
67        }
68        if (mImagePreset != null) {
69            mImageLoader.resetImageForPreset(mImagePreset, this);
70            mImagePreset.fillImageStateAdapter(mImageStateAdapter);
71        }
72        invalidate();
73    }
74
75    public ImageShow(Context context, AttributeSet attrs) {
76        super(context, attrs);
77        mSliderController.setListener(this);
78        mHistoryAdapter = new HistoryAdapter(context, R.layout.filtershow_history_operation_row,
79                R.id.rowTextView);
80        mImageStateAdapter = new ImageStateAdapter(context,
81                R.layout.filtershow_imagestate_row);
82    }
83
84    public ImageShow(Context context) {
85        super(context);
86        mSliderController.setListener(this);
87        mHistoryAdapter = new HistoryAdapter(context, R.layout.filtershow_history_operation_row,
88                R.id.rowTextView);
89    }
90
91    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
92        int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
93        int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
94        setMeasuredDimension(parentWidth, parentHeight);
95        mSliderController.setWidth(parentWidth);
96        mSliderController.setHeight(parentHeight);
97    }
98
99    public void setCurrentFilter(ImageFilter filter) {
100        mCurrentFilter = filter;
101    }
102
103    public void setAdapter(HistoryAdapter adapter) {
104        mHistoryAdapter = adapter;
105    }
106
107    public void showToast(String text) {
108        showToast(text, false);
109    }
110
111    public void showToast(String text, boolean important) {
112        mToast = text;
113        mShowToast = true;
114        mImportantToast = important;
115        invalidate();
116
117        mHandler.postDelayed(new Runnable() {
118            @Override
119            public void run() {
120                mShowToast = false;
121                invalidate();
122            }
123        }, 400);
124    }
125
126    public ImagePreset getImagePreset() {
127        return mImagePreset;
128    }
129
130    public Bitmap getOriginalFrontBitmap() {
131        if (mImageLoader != null) {
132            return mImageLoader.getOriginalBitmapLarge();
133        }
134        return null;
135    }
136
137    public void drawToast(Canvas canvas) {
138        if (mShowToast && mToast != null) {
139            Paint paint = new Paint();
140            paint.setTextSize(128);
141            float textWidth = paint.measureText(mToast);
142            int toastX = (int) ((getWidth() - textWidth) / 2.0f);
143            int toastY = (int) (getHeight() / 3.0f);
144
145            paint.setARGB(255, 0, 0, 0);
146            canvas.drawText(mToast, toastX - 2, toastY - 2, paint);
147            canvas.drawText(mToast, toastX - 2, toastY, paint);
148            canvas.drawText(mToast, toastX, toastY - 2, paint);
149            canvas.drawText(mToast, toastX + 2, toastY + 2, paint);
150            canvas.drawText(mToast, toastX + 2, toastY, paint);
151            canvas.drawText(mToast, toastX, toastY + 2, paint);
152            if (mImportantToast) {
153                paint.setARGB(255, 200, 0, 0);
154            } else {
155                paint.setARGB(255, 255, 255, 255);
156            }
157            canvas.drawText(mToast, toastX, toastY, paint);
158        }
159    }
160
161    public void onDraw(Canvas canvas) {
162        if (mBackgroundImage == null) {
163            mBackgroundImage = mImageLoader.getBackgroundBitmap(getResources());
164        }
165        if (mBackgroundImage != null) {
166            Rect s = new Rect(0, 0, mBackgroundImage.getWidth(),
167                    mBackgroundImage.getHeight());
168            Rect d = new Rect(0, 0, getWidth(), getHeight());
169            canvas.drawBitmap(mBackgroundImage, s, d, mPaint);
170        }
171
172        Bitmap filteredImage = null;
173        if (mImageLoader != null) {
174            filteredImage = mImageLoader.getImageForPreset(this,
175                    getImagePreset(), showHires());
176        }
177
178        if (filteredImage == null) {
179            // if no image for the current preset, use the previous one
180            filteredImage = mFilteredImage;
181        } else {
182            mFilteredImage = filteredImage;
183        }
184
185        if (mShowOriginal || mFilteredImage == null) {
186            mFilteredImage = mForegroundImage;
187        }
188
189        if (mFilteredImage != null) {
190            Rect s = new Rect(0, 0, mFilteredImage.getWidth(),
191                    mFilteredImage.getHeight());
192            float ratio = mFilteredImage.getWidth()
193                    / (float) mFilteredImage.getHeight();
194            float w = getWidth();
195            float h = w / ratio;
196            float ty = (getHeight() - h) / 2.0f;
197            float tx = 0;
198            // t = 0;
199            if (ratio < 1.0f) { // portrait image
200                h = getHeight();
201                w = h * ratio;
202                tx = (getWidth() - w) / 2.0f;
203                ty = 0;
204            }
205            Rect d = new Rect((int) tx, (int) ty, (int) (w + tx),
206                    (int) (h + ty));
207            mImageBounds = d;
208
209            canvas.drawBitmap(mFilteredImage, s, d, mPaint);
210        }
211
212        if (showTitle() && getImagePreset() != null) {
213            mPaint.setARGB(200, 0, 0, 0);
214            mPaint.setTextSize(mTextSize);
215
216            Rect textRect = new Rect(0, 0, getWidth(), mTextSize + mTextPadding);
217            canvas.drawRect(textRect, mPaint);
218            mPaint.setARGB(255, 200, 200, 200);
219            canvas.drawText(getImagePreset().name(), mTextPadding,
220                    10 + mTextPadding, mPaint);
221        }
222        mPaint.setARGB(255, 150, 150, 150);
223        mPaint.setStrokeWidth(4);
224        canvas.drawLine(0, 0, getWidth(), 0, mPaint);
225
226        if (showControls()) {
227            mSliderController.onDraw(canvas);
228        }
229
230        drawToast(canvas);
231    }
232
233    public void setShowControls(boolean value) {
234        mShowControls = value;
235    }
236
237    public boolean showControls() {
238        return mShowControls;
239    }
240
241    public boolean showHires() {
242        return true;
243    }
244
245    public boolean showTitle() {
246        return false;
247    }
248
249    public void setImagePreset(ImagePreset preset) {
250        setImagePreset(preset, true);
251    }
252
253    public void setImagePreset(ImagePreset preset, boolean addToHistory) {
254        mImagePreset = preset;
255        if (getImagePreset() != null) {
256            if (addToHistory) {
257                mHistoryAdapter.insert(getImagePreset(), 0);
258            }
259            getImagePreset().setEndpoint(this);
260            updateImage();
261        }
262        mImagePreset.fillImageStateAdapter(mImageStateAdapter);
263        invalidate();
264    }
265
266    public void setImageLoader(ImageLoader loader) {
267        mImageLoader = loader;
268        if (mImageLoader != null) {
269            mImageLoader.addListener(this);
270        }
271    }
272
273    public void updateImage() {
274        mForegroundImage = getOriginalFrontBitmap();
275        /*
276         * if (mImageLoader != null) {
277         * mImageLoader.resetImageForPreset(getImagePreset(), this); }
278         */
279
280        /*
281         * if (mForegroundImage != null) { Bitmap filteredImage =
282         * mForegroundImage.copy(mConfig, true);
283         * getImagePreset().apply(filteredImage); invalidate(); }
284         */
285    }
286
287    public void updateFilteredImage(Bitmap bitmap) {
288        mFilteredImage = bitmap;
289    }
290
291    public void saveImage(FilterShowActivity filterShowActivity) {
292        mImageLoader.saveImage(getImagePreset(), filterShowActivity);
293    }
294
295    public boolean onTouchEvent(MotionEvent event) {
296        super.onTouchEvent(event);
297        mSliderController.onTouchEvent(event);
298        invalidate();
299        return true;
300    }
301
302    // listview stuff
303
304    public ArrayAdapter getHistoryAdapter() {
305        return mHistoryAdapter;
306    }
307
308    public ArrayAdapter getImageStateAdapter() {
309        return mImageStateAdapter;
310    }
311
312    public void onItemClick(int position) {
313        setImagePreset(new ImagePreset(mHistoryAdapter.getItem(position)), false);
314        // we need a copy from the history
315        mHistoryAdapter.setCurrentPreset(position);
316    }
317
318    public void showOriginal(boolean show) {
319        mShowOriginal = show;
320        invalidate();
321    }
322
323    public float getImageRotation() {
324        return mImageRotation;
325    }
326
327    public float getImageRotationZoomFactor() {
328        return mImageRotationZoomFactor;
329    }
330
331    public void setImageRotation(float imageRotation,
332            float imageRotationZoomFactor) {
333        if (imageRotation != mImageRotation) {
334            invalidate();
335        }
336        mImageRotation = imageRotation;
337        mImageRotationZoomFactor = imageRotationZoomFactor;
338    }
339}
340