UserPresetsManager.java revision 0a24e52185c4e88dd52b8e072cf7cd1d04f74b0a 
1package com.android.gallery3d.filtershow.data;
2
3import android.os.Handler;
4import android.os.HandlerThread;
5import android.os.Message;
6import com.android.gallery3d.R;
7import com.android.gallery3d.filtershow.FilterShowActivity;
8import com.android.gallery3d.filtershow.filters.FilterUserPresetRepresentation;
9import com.android.gallery3d.filtershow.pipeline.ImagePreset;
10
11import java.util.ArrayList;
12
13public class UserPresetsManager implements Handler.Callback {
14
15    private static final String LOGTAG = "UserPresetsManager";
16
17    private FilterShowActivity mActivity;
18    private HandlerThread mHandlerThread = null;
19    private Handler mProcessingHandler = null;
20    private FilterStackSource mUserPresets;
21
22    private static final int LOAD = 1;
23    private static final int LOAD_RESULT = 2;
24    private static final int SAVE = 3;
25    private static final int DELETE = 4;
26    private static final int UPDATE = 5;
27
28    private ArrayList<FilterUserPresetRepresentation> mRepresentations;
29
30    private final Handler mResultHandler = new Handler() {
31        @Override
32        public void handleMessage(Message msg) {
33            switch (msg.what) {
34                case LOAD_RESULT:
35                    resultLoad(msg);
36                    break;
37            }
38        }
39    };
40
41    @Override
42    public boolean handleMessage(Message msg) {
43        switch (msg.what) {
44            case LOAD:
45                processLoad();
46                return true;
47            case SAVE:
48                processSave(msg);
49                return true;
50            case DELETE:
51                processDelete(msg);
52                return true;
53            case UPDATE:
54                processUpdate(msg);
55                return true;
56        }
57        return false;
58    }
59
60    public UserPresetsManager(FilterShowActivity context) {
61        mActivity = context;
62        mHandlerThread = new HandlerThread(LOGTAG,
63                android.os.Process.THREAD_PRIORITY_BACKGROUND);
64        mHandlerThread.start();
65        mProcessingHandler = new Handler(mHandlerThread.getLooper(), this);
66        mUserPresets = new FilterStackSource(mActivity);
67        mUserPresets.open();
68    }
69
70    public ArrayList<FilterUserPresetRepresentation> getRepresentations() {
71        return mRepresentations;
72    }
73
74    public void load() {
75        Message msg = mProcessingHandler.obtainMessage(LOAD);
76        mProcessingHandler.sendMessage(msg);
77    }
78
79    public void close() {
80        mUserPresets.close();
81        mHandlerThread.quit();
82    }
83
84    static class SaveOperation {
85        String json;
86        String name;
87    }
88
89    public void save(ImagePreset preset, String name) {
90        Message msg = mProcessingHandler.obtainMessage(SAVE);
91        SaveOperation op = new SaveOperation();
92        op.json = preset.getJsonString(mActivity.getString(R.string.saved));
93        op.name = name;
94        msg.obj = op;
95        mProcessingHandler.sendMessage(msg);
96    }
97
98    public void delete(int id) {
99        Message msg = mProcessingHandler.obtainMessage(DELETE);
100        msg.arg1 = id;
101        mProcessingHandler.sendMessage(msg);
102    }
103
104    static class UpdateOperation {
105        int id;
106        String name;
107    }
108
109    public void update(FilterUserPresetRepresentation representation) {
110        Message msg = mProcessingHandler.obtainMessage(UPDATE);
111        UpdateOperation op = new UpdateOperation();
112        op.id = representation.getId();
113        op.name = representation.getName();
114        msg.obj = op;
115        mProcessingHandler.sendMessage(msg);
116    }
117
118    private void processLoad() {
119        ArrayList<FilterUserPresetRepresentation> list = mUserPresets.getAllUserPresets();
120        Message msg = mResultHandler.obtainMessage(LOAD_RESULT);
121        msg.obj = list;
122        mResultHandler.sendMessage(msg);
123    }
124
125    private void resultLoad(Message msg) {
126        mRepresentations =
127                (ArrayList<FilterUserPresetRepresentation>) msg.obj;
128        mActivity.updateUserPresetsFromManager();
129    }
130
131    private void processSave(Message msg) {
132        SaveOperation op = (SaveOperation) msg.obj;
133        mUserPresets.insertStack(op.name, op.json.getBytes());
134        processLoad();
135    }
136
137    private void processDelete(Message msg) {
138        int id = msg.arg1;
139        mUserPresets.removeStack(id);
140        processLoad();
141    }
142
143    private void processUpdate(Message msg) {
144        UpdateOperation op = (UpdateOperation) msg.obj;
145        mUserPresets.updateStackName(op.id, op.name);
146        processLoad();
147    }
148
149}
150