Add preview for contrast

 Bug: 5135321
 Bug: 5118011
 Add a preview for the contrast accisibility settings.
 Rename FontSizePreference to the more generic SeekBarSummaryPreference
 as it has nothing to do with font size specifically.

Change-Id: Id516d63d62822cf026af3ce531ec33eb48ae667a

1 files changed, 89 insertions, 0 deletions

diff --git a/src/com/android/browser/preferences/SeekBarSummaryPreference.java b/src/com/android/browser/preferences/SeekBarSummaryPreference.java
new file mode 100644
index 000000000..481fbc72b
--- /dev/null
+++ b/src/com/android/browser/preferences/SeekBarSummaryPreference.java
@@ -0,0 +1,89 @@
+/*
+ * 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.browser.preferences;
+
+import android.content.Context;
+import android.preference.SeekBarPreference;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+import com.android.browser.R;
+
+public class SeekBarSummaryPreference extends SeekBarPreference {
+
+    CharSequence mSummary;
+    TextView mSummaryView;
+
+    public SeekBarSummaryPreference(
+            Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init();
+    }
+
+    public SeekBarSummaryPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public SeekBarSummaryPreference(Context context) {
+        super(context);
+        init();
+    }
+
+    void init() {
+        setWidgetLayoutResource(R.layout.font_size_widget);
+    }
+
+    @Override
+    public void setSummary(CharSequence summary) {
+        mSummary = summary;
+        if (mSummaryView != null) {
+            mSummaryView.setText(mSummary);
+        }
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        return null;
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+        mSummaryView = (TextView) view.findViewById(R.id.text);
+        if (TextUtils.isEmpty(mSummary)) {
+            mSummaryView.setVisibility(View.GONE);
+        } else {
+            mSummaryView.setVisibility(View.VISIBLE);
+            mSummaryView.setText(mSummary);
+        }
+    }
+
+    @Override
+    public void onStartTrackingTouch(SeekBar seekBar) {
+        // Intentionally blank - prevent super.onStartTrackingTouch from running
+    }
+
+    @Override
+    public void onStopTrackingTouch(SeekBar seekBar) {
+        // Intentionally blank - prevent onStopTrackingTouch from running
+    }
+
+}