Accessibility service specific settings.
This is the settings part of the change for adding
support for accessibility service specific settings.
1. Added the first cut of a SettingsCheckBoxPreference
that is a CheckBoxPreference that optionally takes
an intent to be lauched as settings of the item
represented by the preference.
2. Updated the AccessibilitySettigns to use the
SettingsCheckBoxPreference.
Change-Id: If44262b8965c65620c6b8c252f8ef356eb0d95cf
diff --git a/src/com/android/settings/SettingsCheckBoxPreference.java b/src/com/android/settings/SettingsCheckBoxPreference.java
new file mode 100644
index 0000000..6acdfe8
--- /dev/null
+++ b/src/com/android/settings/SettingsCheckBoxPreference.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2011 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;
+
+import android.content.Context;
+import android.content.Intent;
+import android.preference.CheckBoxPreference;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.CheckBox;
+import android.widget.ImageView;
+
+/**
+ * CheckBox preference that optionally shows an icon for launching a settings
+ * {@link android.app.Activity}. The settings activity, if intent for launching
+ * it was provided, can be stared only if the CheckBox in is checked.
+ */
+public class SettingsCheckBoxPreference extends CheckBoxPreference {
+
+ // Integer.MIN_VALUE means not initalized
+ private static int sDimAlpha = Integer.MIN_VALUE;
+
+ private final Intent mSettingsIntent;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param context Context for accessing resources.
+ * @param settingsIntent Intent to use as settings for the item represented by
+ * this preference. Pass <code>null</code> if there is no associated
+ * settings activity.
+ */
+ public SettingsCheckBoxPreference(Context context, Intent settingsIntent) {
+ super(context);
+
+ if (sDimAlpha == Integer.MIN_VALUE) {
+ TypedValue outValue = new TypedValue();
+ context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, outValue, true);
+ sDimAlpha = (int) (outValue.getFloat() * 255);
+ }
+
+ mSettingsIntent = settingsIntent;
+ setWidgetLayoutResource(R.layout.preference_settings_checkbox_widget);
+ }
+
+ @Override
+ protected void onBindView(View view) {
+ super.onBindView(view);
+
+ ImageView settingsButton = (ImageView) view.findViewById(R.id.settings_button);
+ if (settingsButton == null) {
+ return;
+ }
+ if (mSettingsIntent != null) {
+ CheckBox checkbox = (CheckBox) view.findViewById(com.android.internal.R.id.checkbox);
+ if (checkbox == null) {
+ return;
+ }
+ if (checkbox.isChecked()) {
+ settingsButton.setOnClickListener(new OnClickListener() {
+ public void onClick(View view) {
+ getContext().startActivity(mSettingsIntent);
+ }
+ });
+ }
+ settingsButton.setVisibility(View.VISIBLE);
+ if (checkbox.isChecked() && isEnabled()) {
+ settingsButton.setAlpha(255);
+ } else {
+ settingsButton.setAlpha(sDimAlpha);
+ }
+ } else {
+ settingsButton.setVisibility(View.GONE);
+ }
+ }
+}