Add usage bar chart to storage preferences

Change-Id: Ic3c118ac9194e226e6384e01c9ea7e150b1d9521

src/com/android/settings/deviceinfo/UsageBarPreference.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2010 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.deviceinfo;
+
+import com.android.settings.R;
+
+import android.content.Context;
+import android.preference.Preference;
+import android.util.AttributeSet;
+import android.view.View;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/**
+ * Creates a percentage bar chart inside a preference.
+ */
+public class UsageBarPreference extends Preference {
+    private PercentageBarChart mChart = null;
+
+    private final Collection<PercentageBarChart.Entry> mEntries = new ArrayList<PercentageBarChart.Entry>();
+
+    public UsageBarPreference(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        setWidgetLayoutResource(R.layout.preference_memoryusage);
+    }
+
+    public UsageBarPreference(Context context) {
+        super(context);
+        setWidgetLayoutResource(R.layout.preference_memoryusage);
+    }
+
+    public UsageBarPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setWidgetLayoutResource(R.layout.preference_memoryusage);
+    }
+
+    public void addEntry(float percentage, int color) {
+        mEntries.add(PercentageBarChart.createEntry(percentage, color));
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+
+        mChart = (PercentageBarChart) view.findViewById(R.id.percentage_bar_chart);
+
+        mChart.setEntries(mEntries);
+    }
+
+    public void commit() {
+        if (mChart != null) {
+            mChart.invalidate();
+        }
+    }
+
+    public void clear() {
+        mEntries.clear();
+    }
+}