[Step 1] Add preference activities for spell checkers

Bug: 5057977
Change-Id: I8f2f3d480325029c794c058beed2475033a617f9

src/com/android/settings/inputmethod/CheckBoxAndSettingsPreference.java

@@ -0,0 +1,118 @@
+/*
+ * 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.inputmethod;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+import android.content.Context;
+import android.content.Intent;
+import android.preference.CheckBoxPreference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+public class CheckBoxAndSettingsPreference extends CheckBoxPreference {
+    private static final float DISABLED_ALPHA = 0.4f;
+
+    private SettingsPreferenceFragment mFragment;
+    private TextView mTitleText;
+    private TextView mSummaryText;
+    private View mCheckBox;
+    private ImageView mSetingsButton;
+    private Intent mSettingsIntent;
+
+    public CheckBoxAndSettingsPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setLayoutResource(R.layout.preference_inputmethod);
+        setWidgetLayoutResource(R.layout.preference_inputmethod_widget);
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+        mCheckBox = view.findViewById(R.id.inputmethod_pref);
+        mCheckBox.setOnClickListener(
+                new OnClickListener() {
+                    @Override
+                    public void onClick(View arg0) {
+                        onCheckBoxClicked(arg0);
+                    }
+                });
+        mSetingsButton = (ImageView)view.findViewById(R.id.inputmethod_settings);
+        mTitleText = (TextView)view.findViewById(android.R.id.title);
+        mSummaryText = (TextView)view.findViewById(android.R.id.summary);
+        mSetingsButton.setOnClickListener(
+                new OnClickListener() {
+                    @Override
+                    public void onClick(View arg0) {
+                        onSettingsButtonClicked(arg0);
+                    }
+                });
+        enableSettingsButton();
+    }
+
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        super.setEnabled(enabled);
+        enableSettingsButton();
+    }
+
+    public void setFragmentIntent(SettingsPreferenceFragment fragment, Intent intent) {
+        mFragment = fragment;
+        mSettingsIntent = intent;
+    }
+
+    protected void onCheckBoxClicked(View view) {
+        if (isChecked()) {
+            setChecked(false);
+        } else {
+            setChecked(true);
+        }
+    }
+
+    protected void onSettingsButtonClicked(View arg0) {
+        if (mFragment != null && mSettingsIntent != null) {
+            mFragment.startActivity(mSettingsIntent);
+        }
+    }
+
+    private void enableSettingsButton() {
+        if (mSetingsButton != null) {
+            if (mSettingsIntent == null) {
+                mSetingsButton.setVisibility(View.GONE);
+            } else {
+                final boolean checked = isChecked();
+                mSetingsButton.setEnabled(checked);
+                mSetingsButton.setClickable(checked);
+                mSetingsButton.setFocusable(checked);
+                if (!checked) {
+                    mSetingsButton.setAlpha(DISABLED_ALPHA);
+                }
+            }
+        }
+        if (mTitleText != null) {
+            mTitleText.setEnabled(true);
+        }
+        if (mSummaryText != null) {
+            mSummaryText.setEnabled(true);
+        }
+    }
+}