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Charting library for Android compatible with API 8+(Android 2.2).
The newest version!
package lecho.lib.hellocharts.renderer;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Paint.FontMetricsInt;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.text.TextUtils;
import lecho.lib.hellocharts.computator.ChartComputator;
import lecho.lib.hellocharts.model.Axis;
import lecho.lib.hellocharts.model.AxisValue;
import lecho.lib.hellocharts.model.Viewport;
import lecho.lib.hellocharts.util.AxisAutoValues;
import lecho.lib.hellocharts.util.ChartUtils;
import lecho.lib.hellocharts.util.FloatUtils;
import lecho.lib.hellocharts.view.Chart;
/**
* Default axes renderer. Can draw maximum four axes - two horizontal(top/bottom) and two vertical(left/right).
*/
public class AxesRenderer {
private static final int DEFAULT_AXIS_MARGIN_DP = 2;
/**
* Axis positions indexes, used for indexing tabs that holds axes parameters, see below.
*/
private static final int TOP = 0;
private static final int LEFT = 1;
private static final int RIGHT = 2;
private static final int BOTTOM = 3;
/**
* Used to measure label width. If label has mas 5 characters only 5 first characters of this array are used to
* measure text width.
*/
private static final char[] labelWidthChars = new char[]{
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0',
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'};
private Chart chart;
private ChartComputator computator;
private int axisMargin;
private float density;
private float scaledDensity;
private Paint[] labelPaintTab = new Paint[]{new Paint(), new Paint(), new Paint(), new Paint()};
private Paint[] namePaintTab = new Paint[]{new Paint(), new Paint(), new Paint(), new Paint()};
private Paint[] linePaintTab = new Paint[]{new Paint(), new Paint(), new Paint(), new Paint()};
private float[] nameBaselineTab = new float[4];
private float[] labelBaselineTab = new float[4];
private float[] separationLineTab = new float[4];
private int[] labelWidthTab = new int[4];
private int[] labelTextAscentTab = new int[4];
private int[] labelTextDescentTab = new int[4];
private int[] labelDimensionForMarginsTab = new int[4];
private int[] labelDimensionForStepsTab = new int[4];
private int[] tiltedLabelXTranslation = new int[4];
private int[] tiltedLabelYTranslation = new int[4];
private FontMetricsInt[] fontMetricsTab = new FontMetricsInt[]{new FontMetricsInt(), new FontMetricsInt(),
new FontMetricsInt(), new FontMetricsInt()};
/**
* Holds formatted axis value label.
*/
private char[] labelBuffer = new char[64];
/**
* Holds number of values that should be drown for each axis.
*/
private int[] valuesToDrawNumTab = new int[4];
/**
* Holds raw values to draw for each axis.
*/
private float[][] rawValuesTab = new float[4][0];
/**
* Holds auto-generated values that should be drawn, i.e if axis is inside not all auto-generated values should be
* drawn to avoid overdrawing. Used only for auto axes.
*/
private float[][] autoValuesToDrawTab = new float[4][0];
/**
* Holds custom values that should be drawn, used only for custom axes.
*/
private AxisValue[][] valuesToDrawTab = new AxisValue[4][0];
/**
* Buffers for axes lines coordinates(to draw grid in the background).
*/
private float[][] linesDrawBufferTab = new float[4][0];
/**
* Buffers for auto-generated values for each axis, used only if there are auto axes.
*/
private AxisAutoValues[] autoValuesBufferTab = new AxisAutoValues[]{new AxisAutoValues(),
new AxisAutoValues(), new AxisAutoValues(), new AxisAutoValues()};
public AxesRenderer(Context context, Chart chart) {
this.chart = chart;
computator = chart.getChartComputator();
density = context.getResources().getDisplayMetrics().density;
scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;
axisMargin = ChartUtils.dp2px(density, DEFAULT_AXIS_MARGIN_DP);
for (int position = 0; position < 4; ++position) {
labelPaintTab[position].setStyle(Paint.Style.FILL);
labelPaintTab[position].setAntiAlias(true);
namePaintTab[position].setStyle(Paint.Style.FILL);
namePaintTab[position].setAntiAlias(true);
linePaintTab[position].setStyle(Paint.Style.STROKE);
linePaintTab[position].setAntiAlias(true);
}
}
public void onChartSizeChanged() {
onChartDataOrSizeChanged();
}
public void onChartDataChanged() {
onChartDataOrSizeChanged();
}
private void onChartDataOrSizeChanged() {
initAxis(chart.getChartData().getAxisXTop(), TOP);
initAxis(chart.getChartData().getAxisXBottom(), BOTTOM);
initAxis(chart.getChartData().getAxisYLeft(), LEFT);
initAxis(chart.getChartData().getAxisYRight(), RIGHT);
}
public void resetRenderer() {
this.computator = chart.getChartComputator();
}
/**
* Initialize attributes and measurement for axes(left, right, top, bottom);
*/
private void initAxis(Axis axis, int position) {
if (null == axis) {
return;
}
initAxisAttributes(axis, position);
initAxisMargin(axis, position);
initAxisMeasurements(axis, position);
}
private void initAxisAttributes(Axis axis, int position) {
initAxisPaints(axis, position);
initAxisTextAlignment(axis, position);
if (axis.hasTiltedLabels()) {
initAxisDimensionForTiltedLabels(position);
intiTiltedLabelsTranslation(axis, position);
} else {
initAxisDimension(position);
}
}
private void initAxisPaints(Axis axis, int position) {
Typeface typeface = axis.getTypeface();
if (null != typeface) {
labelPaintTab[position].setTypeface(typeface);
namePaintTab[position].setTypeface(typeface);
}
labelPaintTab[position].setColor(axis.getTextColor());
labelPaintTab[position].setTextSize(ChartUtils.sp2px(scaledDensity, axis.getTextSize()));
labelPaintTab[position].getFontMetricsInt(fontMetricsTab[position]);
namePaintTab[position].setColor(axis.getTextColor());
namePaintTab[position].setTextSize(ChartUtils.sp2px(scaledDensity, axis.getTextSize()));
linePaintTab[position].setColor(axis.getLineColor());
labelTextAscentTab[position] = Math.abs(fontMetricsTab[position].ascent);
labelTextDescentTab[position] = Math.abs(fontMetricsTab[position].descent);
labelWidthTab[position] = (int) labelPaintTab[position].measureText(labelWidthChars, 0,
axis.getMaxLabelChars());
}
private void initAxisTextAlignment(Axis axis, int position) {
namePaintTab[position].setTextAlign(Align.CENTER);
if (TOP == position || BOTTOM == position) {
labelPaintTab[position].setTextAlign(Align.CENTER);
} else if (LEFT == position) {
if (axis.isInside()) {
labelPaintTab[position].setTextAlign(Align.LEFT);
} else {
labelPaintTab[position].setTextAlign(Align.RIGHT);
}
} else if (RIGHT == position) {
if (axis.isInside()) {
labelPaintTab[position].setTextAlign(Align.RIGHT);
} else {
labelPaintTab[position].setTextAlign(Align.LEFT);
}
}
}
private void initAxisDimensionForTiltedLabels(int position) {
int pythagoreanFromLabelWidth = (int) Math.sqrt(Math.pow(labelWidthTab[position], 2) / 2);
int pythagoreanFromAscent = (int) Math.sqrt(Math.pow(labelTextAscentTab[position], 2) / 2);
labelDimensionForMarginsTab[position] = pythagoreanFromAscent + pythagoreanFromLabelWidth;
labelDimensionForStepsTab[position] = Math.round(labelDimensionForMarginsTab[position] * 0.75f);
}
private void initAxisDimension(int position) {
if (LEFT == position || RIGHT == position) {
labelDimensionForMarginsTab[position] = labelWidthTab[position];
labelDimensionForStepsTab[position] = labelTextAscentTab[position];
} else if (TOP == position || BOTTOM == position) {
labelDimensionForMarginsTab[position] = labelTextAscentTab[position] +
labelTextDescentTab[position];
labelDimensionForStepsTab[position] = labelWidthTab[position];
}
}
private void intiTiltedLabelsTranslation(Axis axis, int position) {
int pythagoreanFromLabelWidth = (int) Math.sqrt(Math.pow(labelWidthTab[position], 2) / 2);
int pythagoreanFromAscent = (int) Math.sqrt(Math.pow(labelTextAscentTab[position], 2) / 2);
int dx = 0;
int dy = 0;
if (axis.isInside()) {
if (LEFT == position) {
dx = pythagoreanFromAscent;
} else if (RIGHT == position) {
dy = -pythagoreanFromLabelWidth / 2;
} else if (TOP == position) {
dy = (pythagoreanFromAscent + pythagoreanFromLabelWidth / 2) - labelTextAscentTab[position];
} else if (BOTTOM == position) {
dy = -pythagoreanFromLabelWidth / 2;
}
} else {
if (LEFT == position) {
dy = -pythagoreanFromLabelWidth / 2;
} else if (RIGHT == position) {
dx = pythagoreanFromAscent;
} else if (TOP == position) {
dy = -pythagoreanFromLabelWidth / 2;
} else if (BOTTOM == position) {
dy = (pythagoreanFromAscent + pythagoreanFromLabelWidth / 2) - labelTextAscentTab[position];
}
}
tiltedLabelXTranslation[position] = dx;
tiltedLabelYTranslation[position] = dy;
}
private void initAxisMargin(Axis axis, int position) {
int margin = 0;
if (!axis.isInside() && (axis.isAutoGenerated() || !axis.getValues().isEmpty())) {
margin += axisMargin + labelDimensionForMarginsTab[position];
}
margin += getAxisNameMargin(axis, position);
insetContentRectWithAxesMargins(margin, position);
}
private int getAxisNameMargin(Axis axis, int position) {
int margin = 0;
if (!TextUtils.isEmpty(axis.getName())) {
margin += labelTextAscentTab[position];
margin += labelTextDescentTab[position];
margin += axisMargin;
}
return margin;
}
private void insetContentRectWithAxesMargins(int axisMargin, int position) {
if (LEFT == position) {
chart.getChartComputator().insetContentRect(axisMargin, 0, 0, 0);
} else if (RIGHT == position) {
chart.getChartComputator().insetContentRect(0, 0, axisMargin, 0);
} else if (TOP == position) {
chart.getChartComputator().insetContentRect(0, axisMargin, 0, 0);
} else if (BOTTOM == position) {
chart.getChartComputator().insetContentRect(0, 0, 0, axisMargin);
}
}
private void initAxisMeasurements(Axis axis, int position) {
if (LEFT == position) {
if (axis.isInside()) {
labelBaselineTab[position] = computator.getContentRectMinusAllMargins().left + axisMargin;
nameBaselineTab[position] = computator.getContentRectMinusAxesMargins().left - axisMargin
- labelTextDescentTab[position];
} else {
labelBaselineTab[position] = computator.getContentRectMinusAxesMargins().left - axisMargin;
nameBaselineTab[position] = labelBaselineTab[position] - axisMargin
- labelTextDescentTab[position] - labelDimensionForMarginsTab[position];
}
separationLineTab[position] = computator.getContentRectMinusAllMargins().left;
} else if (RIGHT == position) {
if (axis.isInside()) {
labelBaselineTab[position] = computator.getContentRectMinusAllMargins().right - axisMargin;
nameBaselineTab[position] = computator.getContentRectMinusAxesMargins().right + axisMargin
+ labelTextAscentTab[position];
} else {
labelBaselineTab[position] = computator.getContentRectMinusAxesMargins().right + axisMargin;
nameBaselineTab[position] = labelBaselineTab[position] + axisMargin
+ labelTextAscentTab[position] + labelDimensionForMarginsTab[position];
}
separationLineTab[position] = computator.getContentRectMinusAllMargins().right;
} else if (BOTTOM == position) {
if (axis.isInside()) {
labelBaselineTab[position] = computator.getContentRectMinusAllMargins().bottom - axisMargin
- labelTextDescentTab[position];
nameBaselineTab[position] = computator.getContentRectMinusAxesMargins().bottom + axisMargin
+ labelTextAscentTab[position];
} else {
labelBaselineTab[position] = computator.getContentRectMinusAxesMargins().bottom + axisMargin
+ labelTextAscentTab[position];
nameBaselineTab[position] = labelBaselineTab[position] + axisMargin +
labelDimensionForMarginsTab[position];
}
separationLineTab[position] = computator.getContentRectMinusAllMargins().bottom;
} else if (TOP == position) {
if (axis.isInside()) {
labelBaselineTab[position] = computator.getContentRectMinusAllMargins().top + axisMargin
+ labelTextAscentTab[position];
nameBaselineTab[position] = computator.getContentRectMinusAxesMargins().top - axisMargin
- labelTextDescentTab[position];
} else {
labelBaselineTab[position] = computator.getContentRectMinusAxesMargins().top - axisMargin
- labelTextDescentTab[position];
nameBaselineTab[position] = labelBaselineTab[position] - axisMargin -
labelDimensionForMarginsTab[position];
}
separationLineTab[position] = computator.getContentRectMinusAllMargins().top;
} else {
throw new IllegalArgumentException("Invalid axis position: " + position);
}
}
/**
* Prepare axes coordinates and draw axes lines(if enabled) in the background.
*
* @param canvas
*/
public void drawInBackground(Canvas canvas) {
Axis axis = chart.getChartData().getAxisYLeft();
if (null != axis) {
prepareAxisToDraw(axis, LEFT);
drawAxisLines(canvas, axis, LEFT);
}
axis = chart.getChartData().getAxisYRight();
if (null != axis) {
prepareAxisToDraw(axis, RIGHT);
drawAxisLines(canvas, axis, RIGHT);
}
axis = chart.getChartData().getAxisXBottom();
if (null != axis) {
prepareAxisToDraw(axis, BOTTOM);
drawAxisLines(canvas, axis, BOTTOM);
}
axis = chart.getChartData().getAxisXTop();
if (null != axis) {
prepareAxisToDraw(axis, TOP);
drawAxisLines(canvas, axis, TOP);
}
}
private void prepareAxisToDraw(Axis axis, int position) {
if (axis.isAutoGenerated()) {
prepareAutoGeneratedAxis(axis, position);
} else {
prepareCustomAxis(axis, position);
}
}
/**
* Draw axes labels and names in the foreground.
*
* @param canvas
*/
public void drawInForeground(Canvas canvas) {
Axis axis = chart.getChartData().getAxisYLeft();
if (null != axis) {
drawAxisLabelsAndName(canvas, axis, LEFT);
}
axis = chart.getChartData().getAxisYRight();
if (null != axis) {
drawAxisLabelsAndName(canvas, axis, RIGHT);
}
axis = chart.getChartData().getAxisXBottom();
if (null != axis) {
drawAxisLabelsAndName(canvas, axis, BOTTOM);
}
axis = chart.getChartData().getAxisXTop();
if (null != axis) {
drawAxisLabelsAndName(canvas, axis, TOP);
}
}
private void prepareCustomAxis(Axis axis, int position) {
final Viewport maxViewport = computator.getMaximumViewport();
final Viewport visibleViewport = computator.getVisibleViewport();
final Rect contentRect = computator.getContentRectMinusAllMargins();
boolean isAxisVertical = isAxisVertical(position);
float viewportMin, viewportMax;
float scale = 1;
if (isAxisVertical) {
if (maxViewport.height() > 0 && visibleViewport.height() > 0) {
scale = contentRect.height() * (maxViewport.height() / visibleViewport.height());
}
viewportMin = visibleViewport.bottom;
viewportMax = visibleViewport.top;
} else {
if (maxViewport.width() > 0 && visibleViewport.width() > 0) {
scale = contentRect.width() * (maxViewport.width() / visibleViewport.width());
}
viewportMin = visibleViewport.left;
viewportMax = visibleViewport.right;
}
if (scale == 0) {
scale = 1;
}
int module = (int) Math.max(1,
Math.ceil((axis.getValues().size() * labelDimensionForStepsTab[position] * 1.5) / scale));
//Reinitialize tab to hold lines coordinates.
if (axis.hasLines() && (linesDrawBufferTab[position].length < axis.getValues().size() * 4)) {
linesDrawBufferTab[position] = new float[axis.getValues().size() * 4];
}
//Reinitialize tabs to hold all raw values to draw.
if (rawValuesTab[position].length < axis.getValues().size()) {
rawValuesTab[position] = new float[axis.getValues().size()];
}
//Reinitialize tabs to hold all raw values to draw.
if (valuesToDrawTab[position].length < axis.getValues().size()) {
valuesToDrawTab[position] = new AxisValue[axis.getValues().size()];
}
float rawValue;
int valueIndex = 0;
int valueToDrawIndex = 0;
for (AxisValue axisValue : axis.getValues()) {
// Draw axis values that are within visible viewport.
final float value = axisValue.getValue();
if (value >= viewportMin && value <= viewportMax) {
// Draw axis values that have 0 module value, this will hide some labels if there is no place for them.
if (0 == valueIndex % module) {
if (isAxisVertical) {
rawValue = computator.computeRawY(value);
} else {
rawValue = computator.computeRawX(value);
}
if (checkRawValue(contentRect, rawValue, axis.isInside(), position, isAxisVertical)) {
rawValuesTab[position][valueToDrawIndex] = rawValue;
valuesToDrawTab[position][valueToDrawIndex] = axisValue;
++valueToDrawIndex;
}
}
// If within viewport - increment valueIndex;
++valueIndex;
}
}
valuesToDrawNumTab[position] = valueToDrawIndex;
}
private void prepareAutoGeneratedAxis(Axis axis, int position) {
final Viewport visibleViewport = computator.getVisibleViewport();
final Rect contentRect = computator.getContentRectMinusAllMargins();
boolean isAxisVertical = isAxisVertical(position);
float start, stop;
int contentRectDimension;
if (isAxisVertical) {
start = visibleViewport.bottom;
stop = visibleViewport.top;
contentRectDimension = contentRect.height();
} else {
start = visibleViewport.left;
stop = visibleViewport.right;
contentRectDimension = contentRect.width();
}
FloatUtils.computeAutoGeneratedAxisValues(start, stop, contentRectDimension /
labelDimensionForStepsTab[position] / 2, autoValuesBufferTab[position]);
//Reinitialize tab to hold lines coordinates.
if (axis.hasLines()
&& (linesDrawBufferTab[position].length < autoValuesBufferTab[position].valuesNumber * 4)) {
linesDrawBufferTab[position] = new float[autoValuesBufferTab[position].valuesNumber * 4];
}
//Reinitialize tabs to hold all raw and auto values.
if (rawValuesTab[position].length < autoValuesBufferTab[position].valuesNumber) {
rawValuesTab[position] = new float[autoValuesBufferTab[position].valuesNumber];
}
if (autoValuesToDrawTab[position].length < autoValuesBufferTab[position].valuesNumber) {
autoValuesToDrawTab[position] = new float[autoValuesBufferTab[position].valuesNumber];
}
float rawValue;
int valueToDrawIndex = 0;
for (int i = 0; i < autoValuesBufferTab[position].valuesNumber; ++i) {
if (isAxisVertical) {
rawValue = computator.computeRawY(autoValuesBufferTab[position].values[i]);
} else {
rawValue = computator.computeRawX(autoValuesBufferTab[position].values[i]);
}
if (checkRawValue(contentRect, rawValue, axis.isInside(), position, isAxisVertical)) {
rawValuesTab[position][valueToDrawIndex] = rawValue;
autoValuesToDrawTab[position][valueToDrawIndex] = autoValuesBufferTab[position].values[i];
++valueToDrawIndex;
}
}
valuesToDrawNumTab[position] = valueToDrawIndex;
}
private boolean checkRawValue(Rect rect, float rawValue, boolean axisInside, int position, boolean isVertical) {
if (axisInside) {
if (isVertical) {
float marginBottom = labelTextAscentTab[BOTTOM] + axisMargin;
float marginTop = labelTextAscentTab[TOP] + axisMargin;
if (rawValue <= rect.bottom - marginBottom && rawValue >= rect.top + marginTop) {
return true;
} else {
return false;
}
} else {
float margin = labelWidthTab[position] / 2;
if (rawValue >= rect.left + margin && rawValue <= rect.right - margin) {
return true;
} else {
return false;
}
}
}
return true;
}
private void drawAxisLines(Canvas canvas, Axis axis, int position) {
final Rect contentRectMargins = computator.getContentRectMinusAxesMargins();
float separationX1, separationY1, separationX2, separationY2;
separationX1 = separationY1 = separationX2 = separationY2 = 0;
float lineX1, lineY1, lineX2, lineY2;
lineX1 = lineY1 = lineX2 = lineY2 = 0;
boolean isAxisVertical = isAxisVertical(position);
if (LEFT == position || RIGHT == position) {
separationX1 = separationX2 = separationLineTab[position];
separationY1 = contentRectMargins.bottom;
separationY2 = contentRectMargins.top;
lineX1 = contentRectMargins.left;
lineX2 = contentRectMargins.right;
} else if (TOP == position || BOTTOM == position) {
separationX1 = contentRectMargins.left;
separationX2 = contentRectMargins.right;
separationY1 = separationY2 = separationLineTab[position];
lineY1 = contentRectMargins.top;
lineY2 = contentRectMargins.bottom;
}
// Draw separation line with the same color as axis labels and name.
if (axis.hasSeparationLine()) {
canvas.drawLine(separationX1, separationY1, separationX2, separationY2, labelPaintTab[position]);
}
if (axis.hasLines()) {
int valueToDrawIndex = 0;
for (; valueToDrawIndex < valuesToDrawNumTab[position]; ++valueToDrawIndex) {
if (isAxisVertical) {
lineY1 = lineY2 = rawValuesTab[position][valueToDrawIndex];
} else {
lineX1 = lineX2 = rawValuesTab[position][valueToDrawIndex];
}
linesDrawBufferTab[position][valueToDrawIndex * 4 + 0] = lineX1;
linesDrawBufferTab[position][valueToDrawIndex * 4 + 1] = lineY1;
linesDrawBufferTab[position][valueToDrawIndex * 4 + 2] = lineX2;
linesDrawBufferTab[position][valueToDrawIndex * 4 + 3] = lineY2;
}
canvas.drawLines(linesDrawBufferTab[position], 0, valueToDrawIndex * 4, linePaintTab[position]);
}
}
private void drawAxisLabelsAndName(Canvas canvas, Axis axis, int position) {
float labelX, labelY;
labelX = labelY = 0;
boolean isAxisVertical = isAxisVertical(position);
if (LEFT == position || RIGHT == position) {
labelX = labelBaselineTab[position];
} else if (TOP == position || BOTTOM == position) {
labelY = labelBaselineTab[position];
}
for (int valueToDrawIndex = 0; valueToDrawIndex < valuesToDrawNumTab[position]; ++valueToDrawIndex) {
int charsNumber = 0;
if (axis.isAutoGenerated()) {
final float value = autoValuesToDrawTab[position][valueToDrawIndex];
charsNumber = axis.getFormatter().formatValueForAutoGeneratedAxis(labelBuffer, value,
autoValuesBufferTab[position].decimals);
} else {
AxisValue axisValue = valuesToDrawTab[position][valueToDrawIndex];
charsNumber = axis.getFormatter().formatValueForManualAxis(labelBuffer, axisValue);
}
if (isAxisVertical) {
labelY = rawValuesTab[position][valueToDrawIndex];
} else {
labelX = rawValuesTab[position][valueToDrawIndex];
}
if (axis.hasTiltedLabels()) {
canvas.save();
canvas.translate(tiltedLabelXTranslation[position], tiltedLabelYTranslation[position]);
canvas.rotate(-45, labelX, labelY);
canvas.drawText(labelBuffer, labelBuffer.length - charsNumber, charsNumber, labelX, labelY,
labelPaintTab[position]);
canvas.restore();
} else {
canvas.drawText(labelBuffer, labelBuffer.length - charsNumber, charsNumber, labelX, labelY,
labelPaintTab[position]);
}
}
// Drawing axis name
final Rect contentRectMargins = computator.getContentRectMinusAxesMargins();
if (!TextUtils.isEmpty(axis.getName())) {
if (isAxisVertical) {
canvas.save();
canvas.rotate(-90, contentRectMargins.centerY(), contentRectMargins.centerY());
canvas.drawText(axis.getName(), contentRectMargins.centerY(), nameBaselineTab[position],
namePaintTab[position]);
canvas.restore();
} else {
canvas.drawText(axis.getName(), contentRectMargins.centerX(), nameBaselineTab[position],
namePaintTab[position]);
}
}
}
private boolean isAxisVertical(int position) {
if (LEFT == position || RIGHT == position) {
return true;
} else if (TOP == position || BOTTOM == position) {
return false;
} else {
throw new IllegalArgumentException("Invalid axis position " + position);
}
}
}