/**
* Copyright (C) 2009 - 2013 SC 4ViewSoft SRL
*
* 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.codename1.charts.views;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import com.codename1.charts.compat.Canvas;
import com.codename1.charts.compat.Paint;
import com.codename1.charts.compat.Paint.Align;
import com.codename1.charts.models.Point;
import com.codename1.charts.models.SeriesSelection;
import com.codename1.charts.models.XYMultipleSeriesDataset;
import com.codename1.charts.models.XYSeries;
import com.codename1.charts.renderers.BasicStroke;
import com.codename1.charts.renderers.DefaultRenderer;
import com.codename1.charts.renderers.SimpleSeriesRenderer;
import com.codename1.charts.renderers.XYMultipleSeriesRenderer;
import com.codename1.charts.renderers.XYMultipleSeriesRenderer.Orientation;
import com.codename1.charts.renderers.XYSeriesRenderer;
import com.codename1.ui.Component;
import com.codename1.ui.Font;
import com.codename1.ui.geom.Rectangle;
import com.codename1.ui.geom.Rectangle2D;
import com.codename1.charts.compat.Paint.Style;
import com.codename1.charts.util.MathHelper;
/**
* The XY chart rendering class.
*/
public abstract class XYChart extends AbstractChart {
/** The multiple series dataset. */
protected XYMultipleSeriesDataset mDataset;
/** The multiple series renderer. */
protected XYMultipleSeriesRenderer mRenderer;
/** The current scale value. */
private float mScale;
/** The current translate value. */
private float mTranslate;
/** The canvas center point. */
private Point mCenter;
/** The visible chart area, in screen coordinates. */
private Rectangle mScreenR;
/** The calculated range. */
private final HashMap<Integer, double[]> mCalcRange = new HashMap<Integer, double[]>();
/**
* The clickable areas for all points. The array index is the series index,
* and the RectF list index is the point index in that series.
*/
private HashMap<Integer, List<ClickableArea>> clickableAreas = new HashMap<Integer, List<ClickableArea>>();
protected XYChart() {
}
/**
* Builds a new XY chart instance.
*
* @param dataset the multiple series dataset
* @param renderer the multiple series renderer
*/
public XYChart(XYMultipleSeriesDataset dataset, XYMultipleSeriesRenderer renderer) {
mDataset = dataset;
mRenderer = renderer;
}
// TODO: javadoc
protected void setDatasetRenderer(XYMultipleSeriesDataset dataset,
XYMultipleSeriesRenderer renderer) {
mDataset = dataset;
mRenderer = renderer;
}
/**
* The graphical representation of the XY chart.
*
* @param canvas the canvas to paint to
* @param x the top left x value of the view to draw to
* @param y the top left y value of the view to draw to
* @param width the width of the view to draw to
* @param height the height of the view to draw to
* @param paint the paint
*/
public void draw(Canvas canvas, int x, int y, int width, int height, Paint paint) {
paint.setAntiAlias(mRenderer.isAntialiasing());
int legendSize = getLegendSize(mRenderer, height / 5, mRenderer.getAxisTitleTextSize() );
int[] margins = mRenderer.getMargins();
int left = x + margins[1] + (int)mRenderer.getAxisTitleTextSize() + (mRenderer.isShowLabels() ? (int)mRenderer.getLabelsTextSize():0);
int top = y + margins[0];
int right = x + width - margins[3];
int sLength = mDataset.getSeriesCount();
String[] titles = new String[sLength];
for (int i = 0; i < sLength; i++) {
titles[i] = mDataset.getSeriesAt(i).getTitle();
}
if (mRenderer.isFitLegend() && mRenderer.isShowLegend()) {
legendSize = drawLegend(canvas, mRenderer, titles, left, right, y, width, height, legendSize,
paint, true);
}
int bottom = y + height - margins[2] - legendSize - (int)mRenderer.getAxisTitleTextSize() - (mRenderer.isShowLabels()?(int)mRenderer.getLabelsTextSize():0);
if (mScreenR == null) {
mScreenR = new Rectangle();
}
mScreenR.setBounds(left, top, right-left, bottom-top);
drawBackground(mRenderer, canvas, x, y, width, height, paint, false, DefaultRenderer.NO_COLOR);
if (paint.getTypeface() == null
|| (mRenderer.getTextTypeface() != null && paint.getTypeface().equals(
mRenderer.getTextTypeface()))
|| !paint.getTypeface().toString().equals(mRenderer.getTextTypefaceName())
|| paint.getTypeface().getStyle() != mRenderer.getTextTypefaceStyle()) {
if (mRenderer.getTextTypeface() != null) {
paint.setTypeface(mRenderer.getTextTypeface());
} else {
paint.setTypeface(Font.createSystemFont(mRenderer.getTextTypefaceName(),
mRenderer.getTextTypefaceStyle(), Font.SIZE_SMALL));
}
}
Orientation or = mRenderer.getOrientation();
if (or == Orientation.VERTICAL) {
right -= legendSize;
bottom += legendSize - 20;
}
int angle = or.getAngle();
boolean rotate = angle == 90;
mScale = (float) (height) / width;
mTranslate = Math.abs(width - height) / 2;
if (mScale < 1) {
mTranslate *= -1;
}
mCenter = new Point((x + width) / 2, (y + height) / 2);
if (rotate) {
transform(canvas, angle, false);
}
int maxScaleNumber = -Integer.MAX_VALUE;
for (int i = 0; i < sLength; i++) {
maxScaleNumber = Math.max(maxScaleNumber, mDataset.getSeriesAt(i).getScaleNumber());
}
maxScaleNumber++;
if (maxScaleNumber < 0) {
return;
}
double[] minX = new double[maxScaleNumber];
double[] maxX = new double[maxScaleNumber];
double[] minY = new double[maxScaleNumber];
double[] maxY = new double[maxScaleNumber];
boolean[] isMinXSet = new boolean[maxScaleNumber];
boolean[] isMaxXSet = new boolean[maxScaleNumber];
boolean[] isMinYSet = new boolean[maxScaleNumber];
boolean[] isMaxYSet = new boolean[maxScaleNumber];
for (int i = 0; i < maxScaleNumber; i++) {
minX[i] = mRenderer.getXAxisMin(i);
maxX[i] = mRenderer.getXAxisMax(i);
minY[i] = mRenderer.getYAxisMin(i);
maxY[i] = mRenderer.getYAxisMax(i);
isMinXSet[i] = mRenderer.isMinXSet(i);
isMaxXSet[i] = mRenderer.isMaxXSet(i);
isMinYSet[i] = mRenderer.isMinYSet(i);
isMaxYSet[i] = mRenderer.isMaxYSet(i);
if (mCalcRange.get(i) == null) {
mCalcRange.put(i, new double[4]);
}
}
double[] xPixelsPerUnit = new double[maxScaleNumber];
double[] yPixelsPerUnit = new double[maxScaleNumber];
for (int i = 0; i < sLength; i++) {
XYSeries series = mDataset.getSeriesAt(i);
int scale = series.getScaleNumber();
if (series.getItemCount() == 0) {
continue;
}
if (!isMinXSet[scale]) {
double minimumX = series.getMinX();
if (minimumX != MathHelper.NULL_VALUE) {
minX[scale] = minX[scale] == MathHelper.NULL_VALUE ? minimumX : Math.min(minX[scale], minimumX);
mCalcRange.get(scale)[0] = minX[scale];
} else {
minX[scale] = 0;
mCalcRange.get(scale)[0] = 0;
}
}
if (!isMaxXSet[scale]) {
double maximumX = series.getMaxX();
if (maximumX != MathHelper.NULL_VALUE) {
maxX[scale] = maxX[scale] == MathHelper.NULL_VALUE ? maximumX : Math.max(maxX[scale], maximumX);
mCalcRange.get(scale)[1] = maxX[scale];
} else {
maxX[scale] = minX[scale] + 1;
mCalcRange.get(scale)[1] = maxX[scale];
}
}
if (!isMinYSet[scale]) {
double minimumY = series.getMinY();
if (minimumY != MathHelper.NULL_VALUE) {
minY[scale] = minY[scale] == MathHelper.NULL_VALUE ? minimumY : Math.min(minY[scale], (float) minimumY);
mCalcRange.get(scale)[2] = minY[scale];
} else {
minY[scale] = 0;
mCalcRange.get(scale)[2] = 0;
}
}
if (!isMaxYSet[scale]) {
double maximumY = series.getMaxY();
if (maximumY != MathHelper.NULL_VALUE) {
maxY[scale] = maxY[scale] == MathHelper.NULL_VALUE ? maximumY : Math.max(maxY[scale], (float) maximumY);
mCalcRange.get(scale)[3] = maxY[scale];
} else {
maxY[scale] = minY[scale] + 1;
mCalcRange.get(scale)[3] = maxY[scale];
}
}
}
for (int i = 0; i < maxScaleNumber; i++) {
if (maxX[i] - minX[i] != 0) {
xPixelsPerUnit[i] = (right - left) / (maxX[i] - minX[i]);
}
if (maxY[i] - minY[i] != 0) {
yPixelsPerUnit[i] = (float) ((bottom - top) / (maxY[i] - minY[i]));
}
// the X axis on multiple scales was wrong without this fix
if (i > 0) {
xPixelsPerUnit[i] = xPixelsPerUnit[0];
minX[i] = minX[0];
maxX[i] = maxX[0];
}
}
boolean hasValues = false;
// use a linked list for these reasons:
// 1) Avoid a large contiguous memory allocation
// 2) We don't need random seeking, only sequential reading/writing, so
// linked list makes sense
clickableAreas = new HashMap<Integer, List<ClickableArea>>();
for (int i = 0; i < sLength; i++) {
XYSeries series = mDataset.getSeriesAt(i);
int scale = series.getScaleNumber();
if (series.getItemCount() == 0) {
continue;
}
hasValues = true;
XYSeriesRenderer seriesRenderer = (XYSeriesRenderer) mRenderer.getSeriesRendererAt(i);
// int originalValuesLength = series.getItemCount();
// int valuesLength = originalValuesLength;
// int length = valuesLength * 2;
List<Float> points = new ArrayList<Float>();
List<Double> values = new ArrayList<Double>();
float yAxisValue = Math.min(bottom, (float) (bottom + yPixelsPerUnit[scale] * minY[scale]));
LinkedList<ClickableArea> clickableArea = new LinkedList<ClickableArea>();
clickableAreas.put(i, clickableArea);
synchronized (series) {
SortedMap<Double, Double> range = series.getRange(minX[scale], maxX[scale],
seriesRenderer.isDisplayBoundingPoints());
int startIndex = -1;
for (Double value : range.keySet()) {
double xValue = value;
Double rValue = range.get(value);
double yValue = rValue.doubleValue();
if (startIndex < 0 && (!isNullValue(yValue) || isRenderNullValues())) {
startIndex = series.getIndexForKey(xValue);
}
// points.add((float) (left + xPixelsPerUnit[scale]
// * (value.getKey().floatValue() - minX[scale])));
// points.add((float) (bottom - yPixelsPerUnit[scale]
// * (value.getValue().floatValue() - minY[scale])));
values.add(value);
values.add(rValue);
if (!isNullValue(yValue)) {
points.add((float) (left + xPixelsPerUnit[scale] * (xValue - minX[scale])));
points.add((float) (bottom - yPixelsPerUnit[scale] * (yValue - minY[scale])));
} else if (isRenderNullValues()) {
points.add((float) (left + xPixelsPerUnit[scale] * (xValue - minX[scale])));
points.add((float) (bottom - yPixelsPerUnit[scale] * (-minY[scale])));
} else {
if (points.size() > 0) {
drawSeries(series, canvas, paint, points, seriesRenderer, yAxisValue, i, or,
startIndex);
ClickableArea[] clickableAreasForSubSeries = clickableAreasForPoints(points, values,
yAxisValue, i, startIndex);
clickableArea.addAll(Arrays.asList(clickableAreasForSubSeries));
points.clear();
values.clear();
startIndex = -1;
}
clickableArea.add(null);
}
}
int count = series.getAnnotationCount();
if (count > 0) {
paint.setColor(seriesRenderer.getAnnotationsColor());
paint.setTextSize(seriesRenderer.getAnnotationsTextSize());
paint.setTextAlign(seriesRenderer.getAnnotationsTextAlign());
Rectangle2D bound = new Rectangle2D();
for (int j = 0; j < count; j++) {
float xS = (float) (left + xPixelsPerUnit[scale]
* (series.getAnnotationX(j) - minX[scale]));
float yS = (float) (bottom - yPixelsPerUnit[scale]
* (series.getAnnotationY(j) - minY[scale]));
paint.getTextBounds(series.getAnnotationAt(j), 0, series.getAnnotationAt(j).length(),
bound);
if (xS < (xS + bound.getWidth()) && yS < canvas.getHeight()) {
drawString(canvas, series.getAnnotationAt(j), xS, yS, paint);
}
}
}
if (points.size() > 0) {
drawSeries(series, canvas, paint, points, seriesRenderer, yAxisValue, i, or, startIndex);
ClickableArea[] clickableAreasForSubSeries = clickableAreasForPoints(points, values,
yAxisValue, i, startIndex);
clickableArea.addAll(Arrays.asList(clickableAreasForSubSeries));
}
}
}
// draw stuff over the margins such as data doesn't render on these areas
drawBackground(mRenderer, canvas, x, bottom, width, height - bottom, paint, true,
mRenderer.getMarginsColor());
drawBackground(mRenderer, canvas, x, y, width, margins[0], paint, true,
mRenderer.getMarginsColor());
if (or == Orientation.HORIZONTAL) {
drawBackground(mRenderer, canvas, x, y, left - x, height - y, paint, true,
mRenderer.getMarginsColor());
drawBackground(mRenderer, canvas, right, y, margins[3], height - y, paint, true,
mRenderer.getMarginsColor());
} else if (or == Orientation.VERTICAL) {
drawBackground(mRenderer, canvas, right, y, width - right, height - y, paint, true,
mRenderer.getMarginsColor());
drawBackground(mRenderer, canvas, x, y, left - x, height - y, paint, true,
mRenderer.getMarginsColor());
}
boolean showLabels = mRenderer.isShowLabels() && hasValues;
boolean showGridX = mRenderer.isShowGridX();
boolean showTickMarks = mRenderer.isShowTickMarks();
// boolean showCustomTextGridX = mRenderer.isShowCustomTextGridX();
boolean showCustomTextGridY = mRenderer.isShowCustomTextGridY();
if (showLabels || showGridX) {
List<Double> xLabels = getValidLabels(getXLabels(minX[0], maxX[0], mRenderer.getXLabels()));
Map<Integer, List<Double>> allYLabels = getYLabels(minY, maxY, maxScaleNumber);
int xLabelsLeft = left;
if (showLabels) {
paint.setColor(mRenderer.getXLabelsColor());
paint.setTextSize(mRenderer.getLabelsTextSize());
paint.setTextAlign(mRenderer.getXLabelsAlign());
// if (mRenderer.getXLabelsAlign() == Align.LEFT) {
// xLabelsLeft += mRenderer.getLabelsTextSize() / 4;
// }
}
drawXLabels(xLabels, mRenderer.getXTextLabelLocations(), canvas, paint, xLabelsLeft, top,
bottom, xPixelsPerUnit[0], minX[0], maxX[0]);
drawYLabels(allYLabels, canvas, paint, maxScaleNumber, left, right, bottom, yPixelsPerUnit,
minY);
if (showLabels) {
paint.setColor(mRenderer.getLabelsColor());
for (int i = 0; i < maxScaleNumber; i++) {
int axisAlign = mRenderer.getYAxisAlign(i);
Double[] yTextLabelLocations = mRenderer.getYTextLabelLocations(i);
for (Double location : yTextLabelLocations) {
if (minY[i] <= location && location <= maxY[i]) {
float yLabel = (float) (bottom - yPixelsPerUnit[i]
* (location.doubleValue() - minY[i]));
String label = mRenderer.getYTextLabel(location, i);
paint.setColor(mRenderer.getYLabelsColor(i));
paint.setTextAlign(mRenderer.getYLabelsAlign(i));
if (or == Orientation.HORIZONTAL) {
if (axisAlign == Align.LEFT) {
if (showTickMarks) {
canvas.drawLine(left + getLabelLinePos(axisAlign), yLabel, left, yLabel, paint);
}
drawText(canvas, label, left - mRenderer.getYLabelsPadding(),
yLabel - mRenderer.getYLabelsVerticalPadding(), paint,
mRenderer.getYLabelsAngle());
} else {
if (showTickMarks) {
canvas.drawLine(right, yLabel, right + getLabelLinePos(axisAlign), yLabel,
paint);
}
drawText(canvas, label, right - mRenderer.getYLabelsPadding(),
yLabel - mRenderer.getYLabelsVerticalPadding(), paint,
mRenderer.getYLabelsAngle());
}
if (showCustomTextGridY) {
paint.setColor(mRenderer.getGridColor(i));
canvas.drawLine(left, yLabel, right, yLabel, paint);
}
} else {
if (showTickMarks) {
canvas.drawLine(right - getLabelLinePos(axisAlign), yLabel, right, yLabel, paint);
}
drawText(canvas, label, right + 10, yLabel - mRenderer.getYLabelsVerticalPadding(),
paint, mRenderer.getYLabelsAngle());
if (showCustomTextGridY) {
paint.setColor(mRenderer.getGridColor(i));
canvas.drawLine(right, yLabel, left, yLabel, paint);
}
}
}
}
}
}
if (showLabels) {
paint.setColor(mRenderer.getLabelsColor());
float size = mRenderer.getAxisTitleTextSize();
paint.setTextSize(size);
paint.setTextAlign(Align.CENTER);
if (or == Orientation.HORIZONTAL) {
drawText(
canvas,
mRenderer.getXTitle(),
x + width / 2,
bottom + mRenderer.getLabelsTextSize() * 4 / 3 + mRenderer.getXLabelsPadding() + size,
paint, 0);
for (int i = 0; i < maxScaleNumber; i++) {
int axisAlign = mRenderer.getYAxisAlign(i);
if (axisAlign == Align.LEFT) {
drawText(canvas, mRenderer.getYTitle(i), x + size, y + height / 2, paint, -90);
} else {
drawText(canvas, mRenderer.getYTitle(i), x + width, y + height / 2, paint, -90);
}
}
paint.setTextSize(mRenderer.getChartTitleTextSize());
drawText(canvas, mRenderer.getChartTitle(), x + width / 2,
y + mRenderer.getChartTitleTextSize(), paint, 0);
} else if (or == Orientation.VERTICAL) {
drawText(canvas, mRenderer.getXTitle(), x + width / 2,
y + height - size + mRenderer.getXLabelsPadding(), paint, -90);
drawText(canvas, mRenderer.getYTitle(), right + 20, y + height / 2, paint, 0);
paint.setTextSize(mRenderer.getChartTitleTextSize());
drawText(canvas, mRenderer.getChartTitle(), x + size, top + height / 2, paint, 0);
}
}
}
if (or == Orientation.HORIZONTAL) {
drawLegend(canvas, mRenderer, titles, left, right, y + (int) mRenderer.getXLabelsPadding() ,
width, height, legendSize, paint, false);
} else if (or == Orientation.VERTICAL) {
transform(canvas, angle, true);
drawLegend(canvas, mRenderer, titles, left, right, y + (int) mRenderer.getXLabelsPadding() ,
width, height, legendSize, paint, false);
transform(canvas, angle, false);
}
if (mRenderer.isShowAxes()) {
paint.setColor(mRenderer.getXAxisColor());
canvas.drawLine(left, bottom, right, bottom, paint);
paint.setColor(mRenderer.getYAxisColor());
boolean rightAxis = false;
for (int i = 0; i < maxScaleNumber && !rightAxis; i++) {
rightAxis = mRenderer.getYAxisAlign(i) == Align.RIGHT;
}
if (or == Orientation.HORIZONTAL) {
canvas.drawLine(left, top, left, bottom, paint);
if (rightAxis) {
canvas.drawLine(right, top, right, bottom, paint);
}
} else if (or == Orientation.VERTICAL) {
canvas.drawLine(right, top, right, bottom, paint);
}
}
if (rotate) {
transform(canvas, angle, true);
}
}
protected List<Double> getXLabels(double min, double max, int count) {
return MathHelper.getLabels(min, max, count);
}
protected Map<Integer, List<Double>> getYLabels(double[] minY, double[] maxY, int maxScaleNumber) {
HashMap<Integer, List<Double>> allYLabels = new HashMap<Integer, List<Double>>();
for (int i = 0; i < maxScaleNumber; i++) {
allYLabels.put(i,
getValidLabels(MathHelper.getLabels(minY[i], maxY[i], mRenderer.getYLabels())));
}
return allYLabels;
}
protected Rectangle getScreenR() {
return mScreenR;
}
protected void setScreenR(Rectangle screenR) {
mScreenR = screenR;
}
private List<Double> getValidLabels(List<Double> labels) {
List<Double> result = new ArrayList<Double>(labels);
for (Double label : labels) {
if (label.isNaN()) {
result.remove(label);
}
}
return result;
}
/**
* Draws the series.
*
* @param series the series
* @param canvas the canvas
* @param paint the paint object
* @param pointsList the points to be rendered
* @param seriesRenderer the series renderer
* @param yAxisValue the y axis value in pixels
* @param seriesIndex the series index
* @param or the orientation
* @param startIndex the start index of the rendering points
*/
protected void drawSeries(XYSeries series, Canvas canvas, Paint paint, List<Float> pointsList,
XYSeriesRenderer seriesRenderer, float yAxisValue, int seriesIndex, Orientation or,
int startIndex) {
BasicStroke stroke = seriesRenderer.getStroke();
int cap = paint.getStrokeCap();
int join = paint.getStrokeJoin();
float miter = paint.getStrokeMiter();
//PathEffect pathEffect = paint.getPathEffect();
Style style = paint.getStyle();
if (stroke != null) {
setStroke(stroke.getCap(), stroke.getJoin(), stroke.getMiter(), Style.FILL_AND_STROKE, paint);
}
// float[] points = MathHelper.getFloats(pointsList);
drawSeries(canvas, paint, pointsList, seriesRenderer, yAxisValue, seriesIndex, startIndex);
drawPoints(canvas, paint, pointsList, seriesRenderer, yAxisValue, seriesIndex, startIndex);
paint.setTextSize(seriesRenderer.getChartValuesTextSize());
if (or == Orientation.HORIZONTAL) {
paint.setTextAlign(Align.CENTER);
} else {
paint.setTextAlign(Align.LEFT);
}
if (seriesRenderer.isDisplayChartValues()) {
paint.setTextAlign(seriesRenderer.getChartValuesTextAlign());
drawChartValuesText(canvas, series, seriesRenderer, paint, pointsList, seriesIndex,
startIndex);
}
if (stroke != null) {
setStroke(cap, join, miter, style, paint);
}
}
/**
* Draws the series points.
*
* @param canvas the canvas
* @param paint the paint object
* @param pointsList the points to be rendered
* @param seriesRenderer the series renderer
* @param yAxisValue the y axis value in pixels
* @param seriesIndex the series index
* @param startIndex the start index of the rendering points
*/
protected void drawPoints(Canvas canvas, Paint paint, List<Float> pointsList,
XYSeriesRenderer seriesRenderer, float yAxisValue, int seriesIndex, int startIndex) {
if (isRenderPoints(seriesRenderer)) {
ScatterChart pointsChart = getPointsChart();
if (pointsChart != null) {
pointsChart.drawSeries(canvas, paint, pointsList, seriesRenderer, yAxisValue, seriesIndex,
startIndex);
}
}
}
private void setStroke(int cap, int join, float miter, Style style,
Paint paint) {
paint.setStrokeCap(cap);
paint.setStrokeJoin(join);
paint.setStrokeMiter(miter);
//paint.setPathEffect(pathEffect);
paint.setStyle(style);
}
/**
* The graphical representation of the series values as text.
*
* @param canvas the canvas to paint to
* @param series the series to be painted
* @param renderer the series renderer
* @param paint the paint to be used for drawing
* @param points the array of points to be used for drawing the series
* @param seriesIndex the index of the series currently being drawn
* @param startIndex the start index of the rendering points
*/
protected void drawChartValuesText(Canvas canvas, XYSeries series, XYSeriesRenderer renderer,
Paint paint, List<Float> points, int seriesIndex, int startIndex) {
if (points.size() > 2) { // there are more than one point
// record the first point's position
float previousPointX = points.get(0);
float previousPointY = points.get(1);
for (int k = 0; k < points.size(); k += 2) {
if (k == 2) { // decide whether to display first two points' values or
// not
if (Math.abs(points.get(2) - points.get(0)) > renderer.getDisplayChartValuesDistance()
|| Math.abs(points.get(3) - points.get(1)) > renderer.getDisplayChartValuesDistance()) {
// first point
drawText(canvas, getLabel(renderer.getChartValuesFormat(), series.getY(startIndex)),
points.get(0), points.get(1) - renderer.getChartValuesSpacing(), paint, 0);
// second point
drawText(canvas,
getLabel(renderer.getChartValuesFormat(), series.getY(startIndex + 1)),
points.get(2), points.get(3) - renderer.getChartValuesSpacing(), paint, 0);
previousPointX = points.get(2);
previousPointY = points.get(3);
}
} else if (k > 2) {
// compare current point's position with the previous point's, if they
// are not too close, display
if (Math.abs(points.get(k) - previousPointX) > renderer.getDisplayChartValuesDistance()
|| Math.abs(points.get(k + 1) - previousPointY) > renderer
.getDisplayChartValuesDistance()) {
drawText(canvas,
getLabel(renderer.getChartValuesFormat(), series.getY(startIndex + k / 2)),
points.get(k), points.get(k + 1) - renderer.getChartValuesSpacing(), paint, 0);
previousPointX = points.get(k);
previousPointY = points.get(k + 1);
}
}
}
} else { // if only one point, display it
for (int k = 0; k < points.size(); k += 2) {
drawText(canvas,
getLabel(renderer.getChartValuesFormat(), series.getY(startIndex + k / 2)),
points.get(k), points.get(k + 1) - renderer.getChartValuesSpacing(), paint, 0);
}
}
}
/**
* The graphical representation of a text, to handle both HORIZONTAL and
* VERTICAL orientations and extra rotation angles.
*
* @param canvas the canvas to paint to
* @param text the text to be rendered
* @param x the X axis location of the text
* @param y the Y axis location of the text
* @param paint the paint to be used for drawing
* @param extraAngle the text angle
*/
protected void drawText(Canvas canvas, String text, float x, float y, Paint paint,
float extraAngle) {
float angle = -mRenderer.getOrientation().getAngle() + extraAngle;
if (angle != 0) {
// canvas.scale(1 / mScale, mScale);
canvas.rotate(angle, x, y);
}
drawString(canvas, text, x, y, paint);
if (angle != 0) {
canvas.rotate(-angle, x, y);
// canvas.scale(mScale, 1 / mScale);
}
}
/**
* Transform the canvas such as it can handle both HORIZONTAL and VERTICAL
* orientations.
*
* @param canvas the canvas to paint to
* @param angle the angle of rotation
* @param inverse if the inverse transform needs to be applied
*/
private void transform(Canvas canvas, float angle, boolean inverse) {
if (inverse) {
canvas.scale(1 / mScale, mScale);
canvas.translate(mTranslate, -mTranslate);
canvas.rotate(-angle, mCenter.getX(), mCenter.getY());
} else {
canvas.rotate(angle, mCenter.getX(), mCenter.getY());
canvas.translate(-mTranslate, mTranslate);
canvas.scale(mScale, 1 / mScale);
}
}
/**
* The graphical representation of the labels on the X axis.
*
* @param xLabels the X labels values
* @param xTextLabelLocations the X text label locations
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param left the left value of the labels area
* @param top the top value of the labels area
* @param bottom the bottom value of the labels area
* @param xPixelsPerUnit the amount of pixels per one unit in the chart labels
* @param minX the minimum value on the X axis in the chart
* @param maxX the maximum value on the X axis in the chart
*/
protected void drawXLabels(List<Double> xLabels, Double[] xTextLabelLocations, Canvas canvas,
Paint paint, int left, int top, int bottom, double xPixelsPerUnit, double minX, double maxX) {
int length = xLabels.size();
boolean showLabels = mRenderer.isShowLabels();
boolean showGridY = mRenderer.isShowGridY();
boolean showTickMarks = mRenderer.isShowTickMarks();
for (int i = 0; i < length; i++) {
double label = xLabels.get(i);
float xLabel = (float) (left + xPixelsPerUnit * (label - minX));
if (showLabels) {
paint.setColor(mRenderer.getXLabelsColor());
if (showTickMarks) {
canvas
.drawLine(xLabel, bottom, xLabel, bottom + mRenderer.getLabelsTextSize() / 3, paint);
}
drawText(canvas, getLabel(mRenderer.getXLabelFormat(), label), xLabel,
bottom + mRenderer.getLabelsTextSize() * 4 / 3 + mRenderer.getXLabelsPadding(), paint,
mRenderer.getXLabelsAngle());
}
if (showGridY) {
paint.setColor(mRenderer.getGridColor(0));
canvas.drawLine(xLabel, bottom, xLabel, top, paint);
}
}
drawXTextLabels(xTextLabelLocations, canvas, paint, showLabels, left, top, bottom,
xPixelsPerUnit, minX, maxX);
}
/**
* The graphical representation of the labels on the Y axis.
*
* @param allYLabels the Y labels values
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param maxScaleNumber the maximum scale number
* @param left the left value of the labels area
* @param right the right value of the labels area
* @param bottom the bottom value of the labels area
* @param yPixelsPerUnit the amount of pixels per one unit in the chart labels
* @param minY the minimum value on the Y axis in the chart
*/
protected void drawYLabels(Map<Integer, List<Double>> allYLabels, Canvas canvas, Paint paint,
int maxScaleNumber, int left, int right, int bottom, double[] yPixelsPerUnit, double[] minY) {
Orientation or = mRenderer.getOrientation();
boolean showGridX = mRenderer.isShowGridX();
boolean showLabels = mRenderer.isShowLabels();
boolean showTickMarks = mRenderer.isShowTickMarks();
paint.setTextSize(mRenderer.getLabelsTextSize());
for (int i = 0; i < maxScaleNumber; i++) {
paint.setTextAlign(mRenderer.getYLabelsAlign(i));
List<Double> yLabels = allYLabels.get(i);
int length = yLabels.size();
for (int j = 0; j < length; j++) {
double label = yLabels.get(j);
int axisAlign = mRenderer.getYAxisAlign(i);
boolean textLabel = mRenderer.getYTextLabel(label, i) != null;
float yLabel = (float) (bottom - yPixelsPerUnit[i] * (label - minY[i]));
if (or == Orientation.HORIZONTAL) {
if (showLabels && !textLabel) {
paint.setColor(mRenderer.getYLabelsColor(i));
if (axisAlign == Align.LEFT) {
if (showTickMarks) {
canvas.drawLine(left + getLabelLinePos(axisAlign), yLabel, left, yLabel, paint);
}
drawText(canvas, getLabel(mRenderer.getYLabelFormat(i), label),
left - mRenderer.getYLabelsPadding(),
yLabel - mRenderer.getYLabelsVerticalPadding(), paint,
mRenderer.getYLabelsAngle());
} else {
if (showTickMarks) {
canvas.drawLine(right, yLabel, right + getLabelLinePos(axisAlign), yLabel, paint);
}
drawText(canvas, getLabel(mRenderer.getYLabelFormat(i), label),
right + mRenderer.getYLabelsPadding(),
yLabel - mRenderer.getYLabelsVerticalPadding(), paint,
mRenderer.getYLabelsAngle());
}
}
if (showGridX) {
paint.setColor(mRenderer.getGridColor(i));
canvas.drawLine(left, yLabel, right, yLabel, paint);
}
} else if (or == Orientation.VERTICAL) {
if (showLabels && !textLabel) {
paint.setColor(mRenderer.getYLabelsColor(i));
if (showTickMarks) {
canvas.drawLine(right - getLabelLinePos(axisAlign), yLabel, right, yLabel, paint);
}
drawText(canvas, getLabel(mRenderer.getLabelFormat(), label),
right + 10 + mRenderer.getYLabelsPadding(),
yLabel - mRenderer.getYLabelsVerticalPadding(), paint, mRenderer.getYLabelsAngle());
}
if (showGridX) {
paint.setColor(mRenderer.getGridColor(i));
if (showTickMarks) {
canvas.drawLine(right, yLabel, left, yLabel, paint);
}
}
}
}
}
}
/**
* The graphical representation of the text labels on the X axis.
*
* @param xTextLabelLocations the X text label locations
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param left the left value of the labels area
* @param top the top value of the labels area
* @param bottom the bottom value of the labels area
* @param xPixelsPerUnit the amount of pixels per one unit in the chart labels
* @param minX the minimum value on the X axis in the chart
* @param maxX the maximum value on the X axis in the chart
*/
protected void drawXTextLabels(Double[] xTextLabelLocations, Canvas canvas, Paint paint,
boolean showLabels, int left, int top, int bottom, double xPixelsPerUnit, double minX,
double maxX) {
boolean showCustomTextGridX = mRenderer.isShowCustomTextGridX();
boolean showTickMarks = mRenderer.isShowTickMarks();
if (showLabels) {
paint.setColor(mRenderer.getXLabelsColor());
for (Double location : xTextLabelLocations) {
if (minX <= location && location <= maxX) {
float xLabel = (float) (left + xPixelsPerUnit * (location.doubleValue() - minX));
paint.setColor(mRenderer.getXLabelsColor());
if (showTickMarks) {
canvas.drawLine(xLabel, bottom, xLabel, bottom + mRenderer.getLabelsTextSize() / 3,
paint);
}
drawText(canvas, mRenderer.getXTextLabel(location), xLabel,
bottom + mRenderer.getLabelsTextSize() * 4 / 3 + mRenderer.getXLabelsPadding(),
paint, mRenderer.getXLabelsAngle());
if (showCustomTextGridX) {
paint.setColor(mRenderer.getGridColor(0));
canvas.drawLine(xLabel, bottom, xLabel, top, paint);
}
}
}
}
}
// TODO: docs
public XYMultipleSeriesRenderer getRenderer() {
return mRenderer;
}
public XYMultipleSeriesDataset getDataset() {
return mDataset;
}
public double[] getCalcRange(int scale) {
return mCalcRange.get(scale);
}
public void setCalcRange(double[] range, int scale) {
mCalcRange.put(scale, range);
}
public double[] toRealPoint(float screenX, float screenY) {
return toRealPoint(screenX, screenY, 0);
}
public double[] toScreenPoint(double[] realPoint) {
return toScreenPoint(realPoint, 0);
}
private int getLabelLinePos(int align) {
int pos = 4;
if (align == Component.LEFT) {
pos = -pos;
}
return pos;
}
/**
* Transforms a screen point to a real coordinates point.
*
* @param screenX the screen x axis value
* @param screenY the screen y axis value
* @return the real coordinates point
*/
public double[] toRealPoint(float screenX, float screenY, int scale) {
double realMinX = mRenderer.getXAxisMin(scale);
double realMaxX = mRenderer.getXAxisMax(scale);
double realMinY = mRenderer.getYAxisMin(scale);
double realMaxY = mRenderer.getYAxisMax(scale);
if (!mRenderer.isMinXSet(scale) || !mRenderer.isMaxXSet(scale) || !mRenderer.isMinYSet(scale)
|| !mRenderer.isMaxYSet(scale)) {
double[] calcRange = getCalcRange(scale);
if (calcRange != null) {
realMinX = calcRange[0];
realMaxX = calcRange[1];
realMinY = calcRange[2];
realMaxY = calcRange[3];
}
}
if (mScreenR != null) {
return new double[] {
(screenX - mScreenR.getX()) * (realMaxX - realMinX) / mScreenR.getWidth() + realMinX,
(mScreenR.getY() + mScreenR.getHeight() - screenY) * (realMaxY - realMinY) / mScreenR.getHeight()
+ realMinY };
} else {
return new double[] { screenX, screenY };
}
}
public double[] toScreenPoint(double[] realPoint, int scale) {
double realMinX = mRenderer.getXAxisMin(scale);
double realMaxX = mRenderer.getXAxisMax(scale);
double realMinY = mRenderer.getYAxisMin(scale);
double realMaxY = mRenderer.getYAxisMax(scale);
if (!mRenderer.isMinXSet(scale) || !mRenderer.isMaxXSet(scale) || !mRenderer.isMinYSet(scale)
|| !mRenderer.isMaxYSet(scale)) {
double[] calcRange = getCalcRange(scale);
realMinX = calcRange[0];
realMaxX = calcRange[1];
realMinY = calcRange[2];
realMaxY = calcRange[3];
}
if (mScreenR != null) {
return new double[] {
(realPoint[0] - realMinX) * mScreenR.getWidth() / (realMaxX - realMinX) + mScreenR.getX(),
(realMaxY - realPoint[1]) * mScreenR.getHeight() / (realMaxY - realMinY) + mScreenR.getY() };
} else {
return realPoint;
}
}
public SeriesSelection getSeriesAndPointForScreenCoordinate(final Point screenPoint) {
if (clickableAreas != null)
for (int seriesIndex = clickableAreas.size() - 1; seriesIndex >= 0; seriesIndex--) {
// series 0 is drawn first. Then series 1 is drawn on top, and series 2
// on top of that.
// we want to know what the user clicked on, so traverse them in the
// order they appear on the screen.
int pointIndex = 0;
if (clickableAreas.get(seriesIndex) != null) {
Rectangle2D rectangle;
for (ClickableArea area : clickableAreas.get(seriesIndex)) {
if (area != null) {
rectangle = area.getRect();
if (rectangle != null && rectangle.contains(screenPoint.getX(), screenPoint.getY())) {
return new SeriesSelection(seriesIndex, pointIndex, area.getX(), area.getY());
}
}
pointIndex++;
}
}
}
return super.getSeriesAndPointForScreenCoordinate(screenPoint);
}
/**
* The graphical representation of a series.
*
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param points the array of points to be used for drawing the series
* @param seriesRenderer the series renderer
* @param yAxisValue the minimum value of the y axis
* @param seriesIndex the index of the series currently being drawn
* @param startIndex the start index of the rendering points
*/
public abstract void drawSeries(Canvas canvas, Paint paint, List<Float> points,
XYSeriesRenderer seriesRenderer, float yAxisValue, int seriesIndex, int startIndex);
/**
* Returns the clickable areas for all passed points
*
* @param points the array of points
* @param values the array of values of each point
* @param yAxisValue the minimum value of the y axis
* @param seriesIndex the index of the series to which the points belong
* @return an array of rectangles with the clickable area
* @param startIndex the start index of the rendering points
*/
protected abstract ClickableArea[] clickableAreasForPoints(List<Float> points,
List<Double> values, float yAxisValue, int seriesIndex, int startIndex);
/**
* Returns if the chart should display the null values.
*
* @return if null values should be rendered
*/
protected boolean isRenderNullValues() {
return false;
}
/**
* Returns if the chart should display the points as a certain shape.
*
* @param renderer the series renderer
*/
public boolean isRenderPoints(SimpleSeriesRenderer renderer) {
return false;
}
/**
* Returns the default axis minimum.
*
* @return the default axis minimum
*/
public double getDefaultMinimum() {
return MathHelper.NULL_VALUE;
}
/**
* Returns the scatter chart to be used for drawing the data points.
*
* @return the data points scatter chart
*/
public ScatterChart getPointsChart() {
return null;
}
/**
* Returns the chart type identifier.
*
* @return the chart type
*/
public abstract String getChartType();
}