1 files changed, 50 insertions, 0 deletions
diff --git a/src/com/android/settings/widget/ChartAxis.java b/src/com/android/settings/widget/ChartAxis.java
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+++ b/src/com/android/settings/widget/ChartAxis.java
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+/*
+ * 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.widget;
+
+import android.content.res.Resources;
+import android.text.SpannableStringBuilder;
+
+/**
+ * Axis along a {@link ChartView} that knows how to convert between raw point
+ * and screen coordinate systems.
+ */
+public interface ChartAxis {
+
+    /** Set range of raw values this axis should cover. */
+    public void setBounds(long min, long max);
+    /** Set range of screen points this axis should cover. */
+    public void setSize(float size);
+
+    /** Convert raw value into screen point. */
+    public float convertToPoint(long value);
+    /** Convert screen point into raw value. */
+    public long convertToValue(float point);
+
+    /** Build label that describes given raw value. */
+    public void buildLabel(Resources res, SpannableStringBuilder builder, long value);
+
+    /** Return list of tick points for drawing a grid. */
+    public float[] getTickPoints();
+
+    /**
+     * Test if given raw value should cause the axis to grow or shrink;
+     * returning positive value to grow and negative to shrink.
+     */
+    public int shouldAdjustAxis(long value);
+
+}