/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.widget;
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import android.content.res.Resources;
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import android.text.SpannableStringBuilder;
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/**
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* Axis along a {@link ChartView} that knows how to convert between raw point
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* and screen coordinate systems.
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*/
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public interface ChartAxis {
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/** Set range of raw values this axis should cover. */
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public boolean setBounds(long min, long max);
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/** Set range of screen points this axis should cover. */
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public boolean setSize(float size);
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/** Convert raw value into screen point. */
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public float convertToPoint(long value);
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/** Convert screen point into raw value. */
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public long convertToValue(float point);
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/**
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* Build label that describes given raw value. If the label is rounded for
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* display, return the rounded value.
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*/
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public long buildLabel(Resources res, SpannableStringBuilder builder, long value);
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/** Return list of tick points for drawing a grid. */
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public float[] getTickPoints();
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/**
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* Test if given raw value should cause the axis to grow or shrink;
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* returning positive value to grow and negative to shrink.
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*/
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public int shouldAdjustAxis(long value);
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}
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