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/**
* 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.List;
import com.codename1.charts.compat.Canvas;
import com.codename1.charts.compat.Paint;
import com.codename1.charts.compat.Paint.Style;
import com.codename1.charts.models.XYMultipleSeriesDataset;
import com.codename1.charts.models.XYValueSeries;
import com.codename1.charts.renderers.SimpleSeriesRenderer;
import com.codename1.charts.renderers.XYMultipleSeriesRenderer;
import com.codename1.charts.renderers.XYSeriesRenderer;
/**
* The bubble chart rendering class.
*/
public class BubbleChart extends XYChart {
/** The constant to identify this chart type. */
public static final String TYPE = "Bubble";
/** The legend shape width. */
private static final int SHAPE_WIDTH = 10;
/** The minimum bubble size. */
private static final int MIN_BUBBLE_SIZE = 2;
/** The maximum bubble size. */
private static final int MAX_BUBBLE_SIZE = 20;
BubbleChart() {
}
/**
* Builds a new bubble chart instance.
*
* @param dataset the multiple series dataset
* @param renderer the multiple series renderer
*/
public BubbleChart(XYMultipleSeriesDataset dataset, XYMultipleSeriesRenderer renderer) {
super(dataset, renderer);
}
/**
* 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
*/
@Override
public void drawSeries(Canvas canvas, Paint paint, List points,
XYSeriesRenderer renderer, float yAxisValue, int seriesIndex, int startIndex) {
paint.setColor(renderer.getColor());
paint.setStyle(Style.FILL);
int length = points.size();
XYValueSeries series = (XYValueSeries) mDataset.getSeriesAt(seriesIndex);
double max = series.getMaxValue();
double coef = MAX_BUBBLE_SIZE / max;
for (int i = 0; i < length; i += 2) {
double size = series.getValue(startIndex + i / 2) * coef + MIN_BUBBLE_SIZE;
drawCircle(canvas, paint, points.get(i), points.get(i + 1), (float) size);
}
}
@Override
protected ClickableArea[] clickableAreasForPoints(List points, List values,
float yAxisValue, int seriesIndex, int startIndex) {
int length = points.size();
XYValueSeries series = (XYValueSeries) mDataset.getSeriesAt(seriesIndex);
double max = series.getMaxValue();
double coef = MAX_BUBBLE_SIZE / max;
ClickableArea[] ret = new ClickableArea[length / 2];
for (int i = 0; i < length; i += 2) {
double size = series.getValue(startIndex + i / 2) * coef + MIN_BUBBLE_SIZE;
ret[i / 2] = new ClickableArea(PkgUtils.makeRect(points.get(i) - (float) size, points.get(i + 1)
- (float) size, points.get(i) + (float) size, points.get(i + 1) + (float) size),
values.get(i), values.get(i + 1));
}
return ret;
}
/**
* Returns the legend shape width.
*
* @param seriesIndex the series index
* @return the legend shape width
*/
public int getLegendShapeWidth(int seriesIndex) {
return SHAPE_WIDTH;
}
/**
* The graphical representation of the legend shape.
*
* @param canvas the canvas to paint to
* @param renderer the series renderer
* @param x the x value of the point the shape should be drawn at
* @param y the y value of the point the shape should be drawn at
* @param seriesIndex the series index
* @param paint the paint to be used for drawing
*/
public void drawLegendShape(Canvas canvas, SimpleSeriesRenderer renderer, float x, float y,
int seriesIndex, Paint paint) {
paint.setStyle(Style.FILL);
drawCircle(canvas, paint, x + SHAPE_WIDTH, y, 3);
}
/**
* The graphical representation of a circle point shape.
*
* @param canvas the canvas to paint to
* @param paint the paint to be used for drawing
* @param x the x value of the point the shape should be drawn at
* @param y the y value of the point the shape should be drawn at
* @param radius the bubble radius
*/
private void drawCircle(Canvas canvas, Paint paint, float x, float y, float radius) {
canvas.drawCircle(x, y, radius, paint);
}
/**
* Returns the chart type identifier.
*
* @return the chart type
*/
public String getChartType() {
return TYPE;
}
}
