Java tutorial
/* * Copyright (c) 2013 The Johns Hopkins University/Applied Physics Laboratory * All rights reserved. * * This material may be used, modified, or reproduced by or for the U.S. * Government pursuant to the rights granted under the clauses at * DFARS 252.227-7013/7014 or FAR 52.227-14. * * 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 * * NO WARRANTY. THIS MATERIAL IS PROVIDED "AS IS." JHU/APL DISCLAIMS ALL * WARRANTIES IN THE MATERIAL, WHETHER EXPRESS OR IMPLIED, INCLUDING (BUT NOT * LIMITED TO) ANY AND ALL IMPLIED WARRANTIES OF PERFORMANCE, * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF * INTELLECTUAL PROPERTY RIGHTS. ANY USER OF THE MATERIAL ASSUMES THE ENTIRE * RISK AND LIABILITY FOR USING THE MATERIAL. IN NO EVENT SHALL JHU/APL BE * LIABLE TO ANY USER OF THE MATERIAL FOR ANY ACTUAL, INDIRECT, * CONSEQUENTIAL, SPECIAL OR OTHER DAMAGES ARISING FROM THE USE OF, OR * INABILITY TO USE, THE MATERIAL, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES * FOR LOST PROFITS. */ package edu.jhuapl.graphs.jfreechart; import edu.jhuapl.graphs.DataSeriesInterface; import edu.jhuapl.graphs.GraphSource; import edu.jhuapl.graphs.jfreechart.utils.CategoryItemProperty; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.entity.EntityCollection; import org.jfree.chart.labels.CategoryToolTipGenerator; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.CategoryItemRendererState; import org.jfree.chart.renderer.category.LineAndShapeRenderer; import org.jfree.chart.urls.CategoryURLGenerator; import org.jfree.data.category.CategoryDataset; import org.jfree.util.ShapeUtilities; import java.awt.*; import java.awt.geom.Line2D; import java.awt.geom.Rectangle2D; import java.util.List; public class CategoryLineGraphRenderer extends LineAndShapeRenderer { private static final long serialVersionUID = 1103397517467013130L; private final List<? extends DataSeriesInterface> data; private CategoryItemProperty itemProperty; public CategoryLineGraphRenderer(List<? extends DataSeriesInterface> data) { this.data = data; itemProperty = new CategoryItemProperty(data); setUseFillPaint(true); setupItemGenerators(); } @Override public Paint getItemFillPaint(int row, int column) { return itemProperty.get(row, column, Paint.class, super.getItemPaint(row, column), GraphSource.ITEM_COLOR); } @Override public Paint getItemPaint(int row, int column) { DataSeriesInterface dsi = data.get(row); if (dsi == null) { return null; } return (Paint) dsi.getMetadata().get(GraphSource.SERIES_COLOR); } public boolean getItemVisible(int series, int item) { return itemProperty.get(series, item, Boolean.class, super.getItemVisible(series, item), GraphSource.ITEM_VISIBLE); } @Override public Shape getItemShape(int row, int column) { return itemProperty.get(row, column, Shape.class, super.getItemShape(row, column), GraphSource.ITEM_SHAPE); } private void setupItemGenerators() { setBaseToolTipGenerator(new CategoryToolTipGenerator() { @Override public String generateToolTip(CategoryDataset dataset, int row, int column) { return itemProperty.get(row, column, String.class, null, GraphSource.ITEM_TOOL_TIP); } }); setBaseItemURLGenerator(new CategoryURLGenerator() { @Override public String generateURL(CategoryDataset dataset, int series, int category) { return itemProperty.get(series, category, String.class, null, GraphSource.ITEM_URL); } }); } /** * Draw a single data item. * * @param g2 the graphics device. * @param state the renderer state. * @param dataArea the area in which the data is drawn. * @param plot the plot. * @param domainAxis the domain axis. * @param rangeAxis the range axis. * @param dataset the dataset. * @param row the row index (zero-based). * @param column the column index (zero-based). * @param pass the pass index. */ @Override public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) { // do nothing if item is not visible if (!getItemVisible(row, column)) { return; } // do nothing if both the line and shape are not visible if (!getItemLineVisible(row, column) && !getItemShapeVisible(row, column)) { return; } // nothing is drawn for null... Number v = dataset.getValue(row, column); if (v == null) { return; } int visibleRow = state.getVisibleSeriesIndex(row); if (visibleRow < 0) { return; } int visibleRowCount = state.getVisibleSeriesCount(); PlotOrientation orientation = plot.getOrientation(); // current data point... double x1; if (getUseSeriesOffset()) { x1 = domainAxis.getCategorySeriesMiddle(column, dataset.getColumnCount(), visibleRow, visibleRowCount, getItemMargin(), dataArea, plot.getDomainAxisEdge()); } else { x1 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge()); } double value = v.doubleValue(); double y1 = rangeAxis.valueToJava2D(value, dataArea, plot.getRangeAxisEdge()); if (pass == 0 && getItemLineVisible(row, column)) { if (column != 0) { Number previousValue = dataset.getValue(row, column - 1); // Added by Wayne Loschen 5/25/2010 // Modified this method to draw a line between the last non-null value // instead of only drawing a line if the column - 1 value was non-null int prevColumnIndex = column - 1; if (previousValue == null) { while (prevColumnIndex > 0 && previousValue == null) { prevColumnIndex--; previousValue = dataset.getValue(row, prevColumnIndex); } } if (previousValue != null) { // previous data point... double previous = previousValue.doubleValue(); double x0; if (getUseSeriesOffset()) { // WAL - Replaced column - 1 with prevColumnIndex x0 = domainAxis.getCategorySeriesMiddle(prevColumnIndex, dataset.getColumnCount(), visibleRow, visibleRowCount, getItemMargin(), dataArea, plot.getDomainAxisEdge()); } else { // WAL - Replaced column - 1 with prevColumnIndex x0 = domainAxis.getCategoryMiddle(prevColumnIndex, getColumnCount(), dataArea, plot.getDomainAxisEdge()); } double y0 = rangeAxis.valueToJava2D(previous, dataArea, plot.getRangeAxisEdge()); Line2D line = null; if (orientation == PlotOrientation.HORIZONTAL) { line = new Line2D.Double(y0, x0, y1, x1); } else if (orientation == PlotOrientation.VERTICAL) { line = new Line2D.Double(x0, y0, x1, y1); } g2.setPaint(getItemPaint(row, column)); g2.setStroke(getItemStroke(row, column)); g2.draw(line); } } } if (pass == 1) { Shape shape = getItemShape(row, column); if (orientation == PlotOrientation.HORIZONTAL) { shape = ShapeUtilities.createTranslatedShape(shape, y1, x1); } else if (orientation == PlotOrientation.VERTICAL) { shape = ShapeUtilities.createTranslatedShape(shape, x1, y1); } if (getItemShapeVisible(row, column)) { if (getItemShapeFilled(row, column)) { if (getUseFillPaint()) { g2.setPaint(getItemFillPaint(row, column)); } else { g2.setPaint(getItemPaint(row, column)); } g2.fill(shape); } if (getDrawOutlines()) { if (getUseOutlinePaint()) { g2.setPaint(getItemOutlinePaint(row, column)); } else { g2.setPaint(getItemPaint(row, column)); } g2.setStroke(getItemOutlineStroke(row, column)); g2.draw(shape); } } // draw the item label if there is one... if (isItemLabelVisible(row, column)) { if (orientation == PlotOrientation.HORIZONTAL) { drawItemLabel(g2, orientation, dataset, row, column, y1, x1, (value < 0.0)); } else if (orientation == PlotOrientation.VERTICAL) { drawItemLabel(g2, orientation, dataset, row, column, x1, y1, (value < 0.0)); } } // submit the current data point as a crosshair candidate int datasetIndex = plot.indexOf(dataset); updateCrosshairValues(state.getCrosshairState(), dataset.getRowKey(row), dataset.getColumnKey(column), value, datasetIndex, x1, y1, orientation); // add an item entity, if this information is being collected EntityCollection entities = state.getEntityCollection(); if (entities != null) { addItemEntity(entities, dataset, row, column, shape); } } } }