Use fragment for gesture typing preference screen

Bug: 16522808
Change-Id: Ib8c2997466bb006c6b5d4e980344507b822d0023

java/res/xml/prefs.xml

@@ -33,35 +33,9 @@
         android:title="@string/settings_screen_multi_lingual"
         android:key="screen_multi_lingual" />
     <PreferenceScreen
+        android:fragment="com.android.inputmethod.latin.settings.GestureSettingsFragment"
         android:title="@string/settings_screen_gesture"
-        android:key="screen_gesture">
-        <CheckBoxPreference
-            android:key="gesture_input"
-            android:title="@string/gesture_input"
-            android:summary="@string/gesture_input_summary"
-            android:defaultValue="true"
-            android:persistent="true" />
-        <CheckBoxPreference
-            android:key="pref_gesture_floating_preview_text"
-            android:dependency="gesture_input"
-            android:title="@string/gesture_floating_preview_text"
-            android:summary="@string/gesture_floating_preview_text_summary"
-            android:defaultValue="true"
-            android:persistent="true" />
-        <CheckBoxPreference
-            android:key="pref_gesture_preview_trail"
-            android:dependency="gesture_input"
-            android:title="@string/gesture_preview_trail"
-            android:defaultValue="true"
-            android:persistent="true" />
-        <CheckBoxPreference
-            android:key="pref_gesture_space_aware"
-            android:dependency="gesture_input"
-            android:title="@string/gesture_space_aware"
-            android:summary="@string/gesture_space_aware_summary"
-            android:defaultValue="true"
-            android:persistent="true" />
-    </PreferenceScreen>
+        android:key="screen_gesture" />
     <PreferenceScreen
         android:title="@string/settings_screen_correction"
         android:key="screen_correction">

java/res/xml/prefs_screen_gesture.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 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.
+-->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:title="@string/settings_screen_gesture"
+    android:key="screen_gesture">
+    <CheckBoxPreference
+        android:key="gesture_input"
+        android:title="@string/gesture_input"
+        android:summary="@string/gesture_input_summary"
+        android:defaultValue="true"
+        android:persistent="true" />
+    <CheckBoxPreference
+        android:key="pref_gesture_floating_preview_text"
+        android:dependency="gesture_input"
+        android:title="@string/gesture_floating_preview_text"
+        android:summary="@string/gesture_floating_preview_text_summary"
+        android:defaultValue="true"
+        android:persistent="true" />
+    <CheckBoxPreference
+        android:key="pref_gesture_preview_trail"
+        android:dependency="gesture_input"
+        android:title="@string/gesture_preview_trail"
+        android:defaultValue="true"
+        android:persistent="true" />
+    <CheckBoxPreference
+        android:key="pref_gesture_space_aware"
+        android:dependency="gesture_input"
+        android:title="@string/gesture_space_aware"
+        android:summary="@string/gesture_space_aware_summary"
+        android:defaultValue="true"
+        android:persistent="true" />
+</PreferenceScreen>

java/src/com/android/inputmethod/latin/settings/GestureSettingsFragment.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2014 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 com.android.inputmethod.latin.settings;
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+
+import com.android.inputmethod.latin.R;
+
+/**
+ * "Gesture typing preferences" settings sub screen.
+ *
+ * This settings sub screen handles the following gesture typing preferences.
+ * - Enable gesture typing
+ * - Dynamic floating preview
+ * - Show gesture trail
+ * - Phrase gesture
+ */
+public final class GestureSettingsFragment extends SubScreenFragment {
+    @Override
+    public void onCreate(final Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.prefs_screen_gesture);
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(final SharedPreferences prefs, final String key) {
+        // Nothing to do here.
+    }
+}

java/src/com/android/inputmethod/latin/settings/SettingsFragment.java

@@ -117,8 +117,6 @@ public final class SettingsFragment extends InputMethodSettingsFragment
 
         ensureConsistencyOfAutoCorrectionSettings();
 
-        final PreferenceScreen gestureScreen =
-                (PreferenceScreen) findPreference(Settings.SCREEN_GESTURE);
         final PreferenceScreen correctionScreen =
                 (PreferenceScreen) findPreference(Settings.SCREEN_CORRECTION);
         final PreferenceScreen advancedScreen =
@@ -196,7 +194,7 @@ public final class SettingsFragment extends InputMethodSettingsFragment
         }
 
         if (!Settings.readFromBuildConfigIfGestureInputEnabled(res)) {
-            getPreferenceScreen().removePreference(gestureScreen);
+            getPreferenceScreen().removePreference(findPreference(Settings.SCREEN_GESTURE));
         }
 
         AdditionalFeaturesSettingUtils.addAdditionalFeaturesPreferences(context, this);
@@ -210,7 +208,6 @@ public final class SettingsFragment extends InputMethodSettingsFragment
     public void onResume() {
         super.onResume();
         final SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
-        final Resources res = getResources();
         final TwoStatePreference showSetupWizardIcon =
                 (TwoStatePreference)findPreference(Settings.PREF_SHOW_SETUP_WIZARD_ICON);
         if (showSetupWizardIcon != null) {

java/src/com/android/inputmethod/latin/utils/FragmentUtils.java

@@ -20,6 +20,7 @@ import com.android.inputmethod.dictionarypack.DictionarySettingsFragment;
 import com.android.inputmethod.latin.about.AboutPreferences;
 import com.android.inputmethod.latin.settings.CustomInputStyleSettingsFragment;
 import com.android.inputmethod.latin.settings.DebugSettings;
+import com.android.inputmethod.latin.settings.GestureSettingsFragment;
 import com.android.inputmethod.latin.settings.InputSettingsFragment;
 import com.android.inputmethod.latin.settings.MultiLingualSettingsFragment;
 import com.android.inputmethod.latin.settings.SettingsFragment;
@@ -39,6 +40,7 @@ public class FragmentUtils {
         sLatinImeFragments.add(InputSettingsFragment.class.getName());
         sLatinImeFragments.add(MultiLingualSettingsFragment.class.getName());
         sLatinImeFragments.add(CustomInputStyleSettingsFragment.class.getName());
+        sLatinImeFragments.add(GestureSettingsFragment.class.getName());
         sLatinImeFragments.add(DebugSettings.class.getName());
         sLatinImeFragments.add(SettingsFragment.class.getName());
         sLatinImeFragments.add(SpellCheckerSettingsFragment.class.getName());