Move accessibility settings to their own package

Change-Id: I5822bf4a81f5ade4ee0649ed30c2daa40d7e8fe2

src/com/android/settings/accessibility/ToggleFeaturePreferenceFragment.java

@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2013 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.settings.accessibility;
+
+import android.app.ActionBar;
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceScreen;
+import android.view.Gravity;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityManager;
+import android.widget.TextView;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+public abstract class ToggleFeaturePreferenceFragment
+        extends SettingsPreferenceFragment {
+
+    protected ToggleSwitch mToggleSwitch;
+
+    protected String mPreferenceKey;
+    protected Preference mSummaryPreference;
+
+    protected CharSequence mSettingsTitle;
+    protected Intent mSettingsIntent;
+
+    // TODO: Showing sub-sub fragment does not handle the activity title
+    // so we do it but this is wrong. Do a real fix when there is time.
+    private CharSequence mOldActivityTitle;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        PreferenceScreen preferenceScreen = getPreferenceManager().createPreferenceScreen(
+                getActivity());
+        setPreferenceScreen(preferenceScreen);
+        mSummaryPreference = new Preference(getActivity()) {
+                @Override
+            protected void onBindView(View view) {
+                super.onBindView(view);
+                TextView summaryView = (TextView) view.findViewById(R.id.summary);
+                summaryView.setText(getSummary());
+                sendAccessibilityEvent(summaryView);
+            }
+
+            private void sendAccessibilityEvent(View view) {
+                // Since the view is still not attached we create, populate,
+                // and send the event directly since we do not know when it
+                // will be attached and posting commands is not as clean.
+                AccessibilityManager accessibilityManager =
+                        AccessibilityManager.getInstance(getActivity());
+                if (accessibilityManager.isEnabled()) {
+                    AccessibilityEvent event = AccessibilityEvent.obtain();
+                    event.setEventType(AccessibilityEvent.TYPE_VIEW_FOCUSED);
+                    view.onInitializeAccessibilityEvent(event);
+                    view.dispatchPopulateAccessibilityEvent(event);
+                    accessibilityManager.sendAccessibilityEvent(event);
+                }
+            }
+        };
+        mSummaryPreference.setPersistent(false);
+        mSummaryPreference.setLayoutResource(R.layout.text_description_preference);
+        preferenceScreen.addPreference(mSummaryPreference);
+    }
+
+    @Override
+    public void onViewCreated(View view, Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        onInstallActionBarToggleSwitch();
+        onProcessArguments(getArguments());
+        // Set a transparent drawable to prevent use of the default one.
+        getListView().setSelector(new ColorDrawable(Color.TRANSPARENT));
+        getListView().setDivider(null);
+    }
+
+    @Override
+    public void onDestroyView() {
+        getActivity().getActionBar().setCustomView(null);
+        if (mOldActivityTitle != null) {
+            getActivity().getActionBar().setTitle(mOldActivityTitle);
+        }
+        mToggleSwitch.setOnBeforeCheckedChangeListener(null);
+        super.onDestroyView();
+    }
+
+    protected abstract void onPreferenceToggled(String preferenceKey, boolean enabled);
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
+        MenuItem menuItem = menu.add(mSettingsTitle);
+        menuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+        menuItem.setIntent(mSettingsIntent);
+    }
+
+    protected void onInstallActionBarToggleSwitch() {
+        mToggleSwitch = createAndAddActionBarToggleSwitch(getActivity());
+    }
+
+    private ToggleSwitch createAndAddActionBarToggleSwitch(Activity activity) {
+        ToggleSwitch toggleSwitch = new ToggleSwitch(activity);
+        final int padding = activity.getResources().getDimensionPixelSize(
+                R.dimen.action_bar_switch_padding);
+        toggleSwitch.setPaddingRelative(0, 0, padding, 0);
+        activity.getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM,
+                ActionBar.DISPLAY_SHOW_CUSTOM);
+        activity.getActionBar().setCustomView(toggleSwitch,
+                new ActionBar.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT,
+                        ActionBar.LayoutParams.WRAP_CONTENT,
+                                Gravity.CENTER_VERTICAL | Gravity.END));
+        return toggleSwitch;
+    }
+
+    protected void onProcessArguments(Bundle arguments) {
+        // Key.
+        mPreferenceKey = arguments.getString(AccessibilitySettings.EXTRA_PREFERENCE_KEY);
+        // Enabled.
+        final boolean enabled = arguments.getBoolean(AccessibilitySettings.EXTRA_CHECKED);
+        mToggleSwitch.setCheckedInternal(enabled);
+        // Title.
+        PreferenceActivity activity = (PreferenceActivity) getActivity();
+        if (!activity.onIsMultiPane() || activity.onIsHidingHeaders()) {
+            mOldActivityTitle = getActivity().getTitle();
+            String title = arguments.getString(AccessibilitySettings.EXTRA_TITLE);
+            getActivity().getActionBar().setTitle(title);
+        }
+        // Summary.
+        CharSequence summary = arguments.getCharSequence(AccessibilitySettings.EXTRA_SUMMARY);
+        mSummaryPreference.setSummary(summary);
+    }
+}