Add gesture editor (taken mostly from the SDK gesture editor)

2 files changed, 564 insertions, 0 deletions

diff --git a/src/us/minak/CreateGestureActivity.java b/src/us/minak/CreateGestureActivity.java
new file mode 100644
index 0000000..6844b36
--- /dev/null
+++ b/src/us/minak/CreateGestureActivity.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2009 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 us.minak;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.os.Environment;
+import android.view.View;
+import android.view.MotionEvent;
+import android.gesture.GestureOverlayView;
+import android.gesture.Gesture;
+import android.gesture.GestureLibrary;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.io.File;
+
+public class CreateGestureActivity extends Activity {
+    private static final float LENGTH_THRESHOLD = 120.0f;
+
+    private Gesture mGesture;
+    private View mDoneButton;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        
+        setContentView(R.layout.create_gesture);
+
+        mDoneButton = findViewById(R.id.done);
+
+        GestureOverlayView overlay = (GestureOverlayView) findViewById(R.id.gestures_overlay);
+        overlay.addOnGestureListener(new GesturesProcessor());
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        
+        if (mGesture != null) {
+            outState.putParcelable("gesture", mGesture);
+        }
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        
+        mGesture = savedInstanceState.getParcelable("gesture");
+        if (mGesture != null) {
+            final GestureOverlayView overlay =
+                    (GestureOverlayView) findViewById(R.id.gestures_overlay);
+            overlay.post(new Runnable() {
+                public void run() {
+                    overlay.setGesture(mGesture);
+                }
+            });
+
+            mDoneButton.setEnabled(true);
+        }
+    }
+
+    public void addGesture(View v) {
+        if (mGesture != null) {
+            final TextView input = (TextView) findViewById(R.id.gesture_name);
+            final CharSequence name = input.getText();
+            if (name.length() == 0) {
+                input.setError(getString(R.string.error_missing_name));
+                return;
+            }
+
+            final GestureLibrary store = SettingsActivity.getStore();
+            store.addGesture(name.toString(), mGesture);
+            store.save();
+
+            setResult(RESULT_OK);
+
+            final String path = new File(Environment.getExternalStorageDirectory(),
+                    "gestures").getAbsolutePath();
+            Toast.makeText(this, getString(R.string.save_success, path), Toast.LENGTH_LONG).show();
+        } else {
+            setResult(RESULT_CANCELED);
+        }
+
+        finish();
+        
+    }
+    
+    public void cancelGesture(View v) {
+        setResult(RESULT_CANCELED);
+        finish();
+    }
+    
+    private class GesturesProcessor implements GestureOverlayView.OnGestureListener {
+        public void onGestureStarted(GestureOverlayView overlay, MotionEvent event) {
+            mDoneButton.setEnabled(false);
+            mGesture = null;
+        }
+
+        public void onGesture(GestureOverlayView overlay, MotionEvent event) {
+        }
+
+        public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {
+            mGesture = overlay.getGesture();
+            if (mGesture.getLength() < LENGTH_THRESHOLD) {
+                overlay.clear(false);
+            }
+            mDoneButton.setEnabled(true);
+        }
+
+        public void onGestureCancelled(GestureOverlayView overlay, MotionEvent event) {
+        }
+    }
+}
diff --git a/src/us/minak/SettingsActivity.java b/src/us/minak/SettingsActivity.java
new file mode 100644
index 0000000..b366826
--- /dev/null
+++ b/src/us/minak/SettingsActivity.java
@@ -0,0 +1,436 @@
+/*
+ * Copyright (C) 2009 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 us.minak;
+
+import android.app.Dialog;
+import android.app.AlertDialog;
+import android.app.ListActivity;
+import android.os.Bundle;
+import android.os.AsyncTask;
+import android.os.Environment;
+import android.view.View;
+import android.view.ContextMenu;
+import android.view.MenuItem;
+import android.view.LayoutInflater;
+import android.view.ViewGroup;
+import android.gesture.GestureLibrary;
+import android.gesture.Gesture;
+import android.gesture.GestureLibraries;
+import android.widget.TextView;
+import android.widget.EditText;
+import android.widget.AdapterView;
+import android.widget.Toast;
+import android.widget.ArrayAdapter;
+import android.content.DialogInterface;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.text.TextUtils;
+import android.graphics.Bitmap;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.BitmapDrawable;
+
+import java.util.Map;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Comparator;
+import java.util.Set;
+import java.io.File;
+
+public class SettingsActivity extends ListActivity {
+    private static final int STATUS_SUCCESS = 0;
+    private static final int STATUS_CANCELLED = 1;
+    private static final int STATUS_NO_STORAGE = 2;
+    private static final int STATUS_NOT_LOADED = 3;
+
+    private static final int MENU_ID_RENAME = 1;
+    private static final int MENU_ID_REMOVE = 2;
+
+    private static final int DIALOG_RENAME_GESTURE = 1;
+
+    private static final int REQUEST_NEW_GESTURE = 1;
+    
+    // Type: long (id)
+    private static final String GESTURES_INFO_ID = "gestures.info_id";
+
+    private final File mStoreFile = new File(Environment.getExternalStorageDirectory(), "gestures");
+
+    private final Comparator<NamedGesture> mSorter = new Comparator<NamedGesture>() {
+        public int compare(NamedGesture object1, NamedGesture object2) {
+            return object1.name.compareTo(object2.name);
+        }
+    };
+
+    private static GestureLibrary sStore;
+
+    private GesturesAdapter mAdapter;
+    private GesturesLoadTask mTask;
+    private TextView mEmpty;
+
+    private Dialog mRenameDialog;
+    private EditText mInput;
+    private NamedGesture mCurrentRenameGesture;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.gestures_list);
+
+        mAdapter = new GesturesAdapter(this);
+        setListAdapter(mAdapter);
+
+        if (sStore == null) {
+            sStore = GestureLibraries.fromFile(mStoreFile);
+        }
+        mEmpty = (TextView) findViewById(android.R.id.empty);
+        loadGestures();
+
+        registerForContextMenu(getListView());
+    }
+
+    static GestureLibrary getStore() {
+        return sStore;
+    }
+
+    public void reloadGestures(View v) {
+        loadGestures();
+    }
+    
+    public void addGesture(View v) {
+        Intent intent = new Intent(this, CreateGestureActivity.class);
+        startActivityForResult(intent, REQUEST_NEW_GESTURE);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        
+        if (resultCode == RESULT_OK) {
+            switch (requestCode) {
+                case REQUEST_NEW_GESTURE:
+                    loadGestures();
+                    break;
+            }
+        }
+    }
+
+    private void loadGestures() {
+        if (mTask != null && mTask.getStatus() != GesturesLoadTask.Status.FINISHED) {
+            mTask.cancel(true);
+        }        
+        mTask = (GesturesLoadTask) new GesturesLoadTask().execute();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+
+        if (mTask != null && mTask.getStatus() != GesturesLoadTask.Status.FINISHED) {
+            mTask.cancel(true);
+            mTask = null;
+        }
+
+        cleanupRenameDialog();
+    }
+
+    private void checkForEmpty() {
+        if (mAdapter.getCount() == 0) {
+            mEmpty.setText(R.string.gestures_empty);
+        }
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+
+        if (mCurrentRenameGesture != null) {
+            outState.putLong(GESTURES_INFO_ID, mCurrentRenameGesture.gesture.getID());
+        }
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Bundle state) {
+        super.onRestoreInstanceState(state);
+
+        long id = state.getLong(GESTURES_INFO_ID, -1);
+        if (id != -1) {
+            final Set<String> entries = sStore.getGestureEntries();
+out:        for (String name : entries) {
+                for (Gesture gesture : sStore.getGestures(name)) {
+                    if (gesture.getID() == id) {
+                        mCurrentRenameGesture = new NamedGesture();
+                        mCurrentRenameGesture.name = name;
+                        mCurrentRenameGesture.gesture = gesture;
+                        break out;
+                    }
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v,
+            ContextMenu.ContextMenuInfo menuInfo) {
+
+        super.onCreateContextMenu(menu, v, menuInfo);
+
+        AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo;
+        menu.setHeaderTitle(((TextView) info.targetView).getText());
+
+        menu.add(0, MENU_ID_RENAME, 0, R.string.gestures_rename);
+        menu.add(0, MENU_ID_REMOVE, 0, R.string.gestures_delete);
+    }
+
+    @Override
+    public boolean onContextItemSelected(MenuItem item) {
+        final AdapterView.AdapterContextMenuInfo menuInfo = (AdapterView.AdapterContextMenuInfo)
+                item.getMenuInfo();
+        final NamedGesture gesture = (NamedGesture) menuInfo.targetView.getTag();
+
+        switch (item.getItemId()) {
+            case MENU_ID_RENAME:
+                renameGesture(gesture);
+                return true;
+            case MENU_ID_REMOVE:
+                deleteGesture(gesture);
+                return true;
+        }
+
+        return super.onContextItemSelected(item);
+    }
+
+    private void renameGesture(NamedGesture gesture) {
+        mCurrentRenameGesture = gesture;
+        showDialog(DIALOG_RENAME_GESTURE);
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        if (id == DIALOG_RENAME_GESTURE) {
+            return createRenameDialog();
+        }
+        return super.onCreateDialog(id);
+    }
+
+    @Override
+    protected void onPrepareDialog(int id, Dialog dialog) {
+        super.onPrepareDialog(id, dialog);
+        if (id == DIALOG_RENAME_GESTURE) {
+            mInput.setText(mCurrentRenameGesture.name);
+        }
+    }
+
+    private Dialog createRenameDialog() {
+        final View layout = View.inflate(this, R.layout.dialog_rename, null);
+        mInput = (EditText) layout.findViewById(R.id.name);
+        ((TextView) layout.findViewById(R.id.label)).setText(R.string.gestures_rename_label);
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
+        builder.setIcon(0);
+        builder.setTitle(getString(R.string.gestures_rename_title));
+        builder.setCancelable(true);
+        builder.setOnCancelListener(new Dialog.OnCancelListener() {
+            public void onCancel(DialogInterface dialog) {
+                cleanupRenameDialog();
+            }
+        });
+        builder.setNegativeButton(getString(R.string.cancel_action),
+            new Dialog.OnClickListener() {
+                public void onClick(DialogInterface dialog, int which) {
+                    cleanupRenameDialog();
+                }
+            }
+        );
+        builder.setPositiveButton(getString(R.string.rename_action),
+            new Dialog.OnClickListener() {
+                public void onClick(DialogInterface dialog, int which) {
+                    changeGestureName();
+                }
+            }
+        );
+        builder.setView(layout);
+        return builder.create();
+    }
+
+    private void changeGestureName() {
+        final String name = mInput.getText().toString();
+        if (!TextUtils.isEmpty(name)) {
+            final NamedGesture renameGesture = mCurrentRenameGesture;
+            final GesturesAdapter adapter = mAdapter;
+            final int count = adapter.getCount();
+
+            // Simple linear search, there should not be enough items to warrant
+            // a more sophisticated search
+            for (int i = 0; i < count; i++) {
+                final NamedGesture gesture = adapter.getItem(i);
+                if (gesture.gesture.getID() == renameGesture.gesture.getID()) {
+                    sStore.removeGesture(gesture.name, gesture.gesture);
+                    gesture.name = mInput.getText().toString();
+                    sStore.addGesture(gesture.name, gesture.gesture);
+                    break;
+                }
+            }
+
+            adapter.notifyDataSetChanged();
+        }
+        mCurrentRenameGesture = null;
+    }
+
+    private void cleanupRenameDialog() {
+        if (mRenameDialog != null) {
+            mRenameDialog.dismiss();
+            mRenameDialog = null;
+        }
+        mCurrentRenameGesture = null;
+    }
+
+    private void deleteGesture(NamedGesture gesture) {
+        sStore.removeGesture(gesture.name, gesture.gesture);
+        sStore.save();
+
+        final GesturesAdapter adapter = mAdapter;
+        adapter.setNotifyOnChange(false);
+        adapter.remove(gesture);
+        adapter.sort(mSorter);
+        checkForEmpty();
+        adapter.notifyDataSetChanged();
+
+        Toast.makeText(this, R.string.gestures_delete_success, Toast.LENGTH_SHORT).show();
+    }
+
+    private class GesturesLoadTask extends AsyncTask<Void, NamedGesture, Integer> {
+        private int mThumbnailSize;
+        private int mThumbnailInset;
+        private int mPathColor;
+
+        @Override
+        protected void onPreExecute() {
+            super.onPreExecute();
+
+            final Resources resources = getResources();
+            mPathColor = resources.getColor(R.color.gesture_color);
+            mThumbnailInset = (int) resources.getDimension(R.dimen.gesture_thumbnail_inset);
+            mThumbnailSize = (int) resources.getDimension(R.dimen.gesture_thumbnail_size);
+
+            findViewById(R.id.addButton).setEnabled(false);
+            findViewById(R.id.reloadButton).setEnabled(false);
+            
+            mAdapter.setNotifyOnChange(false);            
+            mAdapter.clear();
+        }
+
+        @Override
+        protected Integer doInBackground(Void... params) {
+            if (isCancelled()) return STATUS_CANCELLED;
+            if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
+                return STATUS_NO_STORAGE;
+            }
+
+            final GestureLibrary store = sStore;
+
+            if (store.load()) {
+                for (String name : store.getGestureEntries()) {
+                    if (isCancelled()) break;
+
+                    for (Gesture gesture : store.getGestures(name)) {
+                        final Bitmap bitmap = gesture.toBitmap(mThumbnailSize, mThumbnailSize,
+                                mThumbnailInset, mPathColor);
+                        final NamedGesture namedGesture = new NamedGesture();
+                        namedGesture.gesture = gesture;
+                        namedGesture.name = name;
+
+                        mAdapter.addBitmap(namedGesture.gesture.getID(), bitmap);
+                        publishProgress(namedGesture);
+                    }
+                }
+
+                return STATUS_SUCCESS;
+            }
+
+            return STATUS_NOT_LOADED;
+        }
+
+        @Override
+        protected void onProgressUpdate(NamedGesture... values) {
+            super.onProgressUpdate(values);
+
+            final GesturesAdapter adapter = mAdapter;
+            adapter.setNotifyOnChange(false);
+
+            for (NamedGesture gesture : values) {
+                adapter.add(gesture);
+            }
+
+            adapter.sort(mSorter);
+            adapter.notifyDataSetChanged();
+        }
+
+        @Override
+        protected void onPostExecute(Integer result) {
+            super.onPostExecute(result);
+
+            if (result == STATUS_NO_STORAGE) {
+                getListView().setVisibility(View.GONE);
+                mEmpty.setVisibility(View.VISIBLE);
+                mEmpty.setText(getString(R.string.gestures_error_loading,
+                        mStoreFile.getAbsolutePath()));
+            } else {
+                findViewById(R.id.addButton).setEnabled(true);
+                findViewById(R.id.reloadButton).setEnabled(true);
+                checkForEmpty();
+            }
+        }
+    }
+
+    static class NamedGesture {
+        String name;
+        Gesture gesture;
+    }
+
+    private class GesturesAdapter extends ArrayAdapter<NamedGesture> {
+        private final LayoutInflater mInflater;
+        private final Map<Long, Drawable> mThumbnails = Collections.synchronizedMap(
+                new HashMap<Long, Drawable>());
+
+        public GesturesAdapter(Context context) {
+            super(context, 0);
+            mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        }
+
+        void addBitmap(Long id, Bitmap bitmap) {
+            mThumbnails.put(id, new BitmapDrawable(bitmap));
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            if (convertView == null) {
+                convertView = mInflater.inflate(R.layout.gestures_item, parent, false);
+            }
+
+            final NamedGesture gesture = getItem(position);
+            final TextView label = (TextView) convertView;
+
+            label.setTag(gesture);
+            label.setText(gesture.name);
+            label.setCompoundDrawablesWithIntrinsicBounds(mThumbnails.get(gesture.gesture.getID()),
+                    null, null, null);
+
+            return convertView;
+        }
+    }
+}