Java tutorial
/* * This program is free software; you can redistribute it and/or modify it under the * terms of the GNU General Public License, version 2 as published by the Free Software * Foundation. * * You should have received a copy of the GNU General Public License along with this * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html * or from the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * * Copyright 2006 - 2013 Pentaho Corporation. All rights reserved. */ package org.pentaho.platform.uifoundation.chart; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.Node; import org.jfree.chart.plot.DialShape; import org.jfree.chart.plot.MeterInterval; import org.jfree.data.Range; import org.jfree.ui.RectangleEdge; import org.pentaho.commons.connection.DataUtilities; import org.pentaho.commons.connection.IPentahoResultSet; import org.pentaho.commons.connection.PentahoDataTransmuter; import org.pentaho.platform.api.engine.IPentahoSession; import org.pentaho.platform.uifoundation.messages.Messages; import org.pentaho.platform.util.messages.LocaleHelper; import java.awt.BasicStroke; import java.awt.Color; import java.awt.Font; import java.awt.Image; import java.awt.Paint; import java.awt.Stroke; import java.util.ArrayList; import java.util.Iterator; import java.util.List; /** * This class represents the definition of a dashboard dial. It holds: * <ul> * <li>The value to be displayed on the dial</li> * <li>Minimum value of the dial</li> * <li>Maximum value of the dial</li> * <li>A list of intervals with the dial. Each interval specifies a minimum, maximum and information about how the * interval should be painted.</li> * <li>Painting information * <ul> * <li>Background paint</li> * <li>Dial paint</li> * <li>Needle paint</li> * </ul> * </ul> * * <p/> * This class does not generate an image of the dial, it just defines the properties of the dial. * <p/> * Dial definitions are stored in xml documents in the solution folders with *.dial.xml extensions. These * definition files store XML representations of all the settings here. Typically the value to be displayed is * provided at runtime by a query or business rule, but the value can also read from the definition file. * <p/> * The definitions are read by org.pentaho.core.ui.component.DashboardWidgetComponent objects, which create * instances of this object and set the properties defined here. * <p/> * The DashboardWidgetComponent objects pass this, now populated, object to * * The dial image is generated by {@link org.pentaho.core.ui.component.JFreeChartEngine} * <p/> * * Example Dial <br/> * <img src="doc-files/DialWidgetDefinition-1.png"> */ public class DialWidgetDefinition extends WidgetDefinition implements ChartDefinition { private static final long serialVersionUID = 2232742163326878608L; private final ArrayList intervals = new ArrayList(); private final RectangleEdge titlePosition = RectangleEdge.TOP; private Paint chartBackgroundPaint = Color.WHITE; private Paint plotBackgroundPaint = Color.GRAY; private Paint needlePaint = Color.blue; private DialShape dialShape = DialShape.CHORD; private Font titleFont; private final List subTitles = new ArrayList(); private boolean rangeLimited; private int tickSize = 5; private Paint tickPaint = Color.blue; private Paint valuePaint = Color.BLUE; private Font valueFont; private String units; private Font legendFont = null; private boolean legendBorderVisible = true; private RectangleEdge legendPosition = RectangleEdge.BOTTOM; private Node attributes = null; private Float backgroundAlpha; private Float foregroundAlpha; // private IPentahoSession session; public DialWidgetDefinition(final double value, final double minimum, final double maximum, final boolean rangeLimited) { super(value, minimum, maximum); this.rangeLimited = rangeLimited; } /** * TODO PROBLEM HERE! If you use this constructor, the XML schema for the chart attributes is different than if * you use the constructor with the arguments public DialWidgetDefinition( Document document, double value, int * width, int height, IPentahoSession session). This constructor expects the chart attribute nodes to be children * of the <chart-attributes> node, whereas the latter constructor expects the attributes to be children of a * <dial> node. This does not help us with our parity situation, and should be deprecated and reconciled. * * @param data * @param byRow * @param chartAttributes * @param width * @param height * @param session */ public DialWidgetDefinition(final IPentahoResultSet data, final boolean byRow, final Node chartAttributes, final int width, final int height, final IPentahoSession session) { this(0.0, Double.MIN_VALUE, Double.MAX_VALUE, false); attributes = chartAttributes; if (data != null) { if (byRow) { setDataByRow(data); } else { setDataByColumn(data); } } // set legend font setLegendFont(chartAttributes.selectSingleNode(ChartDefinition.LEGEND_FONT_NODE_NAME)); // set legend border visible setLegendBorderVisible(chartAttributes.selectSingleNode(ChartDefinition.DISPLAY_LEGEND_BORDER_NODE_NAME)); // set the alfa layers Node backgroundAlphaNode = chartAttributes.selectSingleNode(ChartDefinition.BACKGROUND_ALPHA_NODE_NAME); Node foregroundAlphaNode = chartAttributes.selectSingleNode(ChartDefinition.FOREGROUND_ALPHA_NODE_NAME); if (backgroundAlphaNode != null) { setBackgroundAlpha(chartAttributes.selectSingleNode(ChartDefinition.BACKGROUND_ALPHA_NODE_NAME)); } if (foregroundAlphaNode != null) { setForegroundAlpha(chartAttributes.selectSingleNode(ChartDefinition.FOREGROUND_ALPHA_NODE_NAME)); } DialWidgetDefinition.createDial(this, chartAttributes, width, height, session); } /** * TODO: PROBLEM HERE! See the note on the constructor above. * * @param document * @param value * @param width * @param height * @param session */ public DialWidgetDefinition(final Document document, final double value, final int width, final int height, final IPentahoSession session) { this(value, Double.MIN_VALUE, Double.MAX_VALUE, false); // get the dial node from the document attributes = document.selectSingleNode("//dial"); //$NON-NLS-1$ deriveMinMax(value); // create the dial definition object DialWidgetDefinition.createDial(this, attributes, width, height, session); } public static Log getLogger() { return LogFactory.getLog(DialWidgetDefinition.class); } /* * public ThermometerWidgetDefinition createThermometer( Document doc ) { // TODO implement this to return a * ThermometerWidgetDefinition object return null; } */ /** * Create a dial definition object from an XML document * * @param doc * definition XML document * @return Dial definition object */ public static void createDial(final DialWidgetDefinition widgetDefinition, final Node dialNode, final int width, final int height, final IPentahoSession session) { Node node = dialNode.selectSingleNode("units"); //$NON-NLS-1$ if (node != null) { String units = node.getText(); widgetDefinition.setUnits(units); } // set the background Paint Paint paint = JFreeChartEngine.getPaint(dialNode.selectSingleNode("background-color")); //$NON-NLS-1$ if (paint == null) { Element backgroundNode = (Element) dialNode.selectSingleNode("chart-background"); //$NON-NLS-1$ if (backgroundNode != null) { String backgroundType = backgroundNode.attributeValue("type"); //$NON-NLS-1$ if ("texture".equals(backgroundType)) { //$NON-NLS-1$ paint = JFreeChartEngine.getTexturePaint(backgroundNode, width, height, session); } else if ("gradient".equals(backgroundType)) { //$NON-NLS-1$ paint = JFreeChartEngine.getGradientPaint(backgroundNode, width, height); } } } else { // log a deprecation warning for background-color ... DialWidgetDefinition.getLogger().warn(Messages.getInstance().getString("CHART.WARN_DEPRECATED_PROPERTY", //$NON-NLS-1$ "background-color", "chart-background")); //$NON-NLS-1$ //$NON-NLS-2$ DialWidgetDefinition.getLogger().warn( Messages.getInstance().getString("CHART.WARN_PROPERTY_WILL_NOT_VALIDATE", "background-color")); //$NON-NLS-1$ //$NON-NLS-2$ } if (paint != null) { widgetDefinition.setChartBackgroundPaint(paint); } // set the dial background Paint paint = JFreeChartEngine.getPaint(dialNode.selectSingleNode("plot-background-color")); //$NON-NLS-1$ if (paint == null) { Element backgroundNode = (Element) dialNode.selectSingleNode("plot-background"); //$NON-NLS-1$ if (backgroundNode != null) { String backgroundType = backgroundNode.attributeValue("type"); //$NON-NLS-1$ if ("texture".equals(backgroundType)) { //$NON-NLS-1$ paint = JFreeChartEngine.getTexturePaint(backgroundNode, width, height, session); } else if ("gradient".equals(backgroundType)) { //$NON-NLS-1$ paint = JFreeChartEngine.getGradientPaint(backgroundNode, width, height); } } } else { // log a deprecation warning for plot-background-color ... DialWidgetDefinition.getLogger().warn(Messages.getInstance().getString("CHART.WARN_DEPRECATED_PROPERTY", //$NON-NLS-1$ "plot-background-color", "plot-background")); //$NON-NLS-1$ //$NON-NLS-2$ DialWidgetDefinition.getLogger().warn(Messages.getInstance() .getString("CHART.WARN_PROPERTY_WILL_NOT_VALIDATE", "plot-background-color")); //$NON-NLS-1$ //$NON-NLS-2$ } if (paint != null) { widgetDefinition.setPlotBackgroundPaint(paint); } // set the needle Paint paint = JFreeChartEngine.getPaint(dialNode.selectSingleNode("needle-color")); //$NON-NLS-1$ if (paint != null) { widgetDefinition.setNeedlePaint(paint); } // set the tick Paint paint = JFreeChartEngine.getPaint(dialNode.selectSingleNode("tick-color")); //$NON-NLS-1$ if (paint != null) { widgetDefinition.setTickPaint(paint); } Node tmpNode = dialNode.selectSingleNode("tick-interval"); //$NON-NLS-1$ if (tmpNode != null) { widgetDefinition.setTickSize(Integer.parseInt(dialNode.selectSingleNode("tick-interval").getText())); //$NON-NLS-1$ } // set the value Paint paint = JFreeChartEngine.getPaint(dialNode.selectSingleNode("value-color")); //$NON-NLS-1$ if (paint != null) { widgetDefinition.setValuePaint(paint); } // TODO get this from the XML document widgetDefinition.setDialShape(DialShape.CHORD); Node titleFontNode = dialNode.selectSingleNode("title-font"); //$NON-NLS-1$ if (titleFontNode != null) { Node fontNode = titleFontNode.selectSingleNode("font"); //$NON-NLS-1$ if (fontNode != null) { String titleFontStr = fontNode.getText().trim(); if (!"".equals(titleFontStr)) { //$NON-NLS-1$ Node titleFontSizeNode = titleFontNode.selectSingleNode("size"); //$NON-NLS-1$ int size = titleFontSizeNode != null ? Integer.parseInt(titleFontSizeNode.getText()) : 12; widgetDefinition.setTitleFont(new Font(titleFontStr, Font.BOLD, size)); } } else { String titleFontStr = titleFontNode.getText().trim(); if (!"".equals(titleFontStr)) { //$NON-NLS-1$ widgetDefinition.setTitleFont(new Font(titleFontStr, Font.ITALIC, 24)); } } } Node valueFontNode = dialNode.selectSingleNode("domain-tick-font"); //$NON-NLS-1$ if (valueFontNode != null) { Node fontNode = valueFontNode.selectSingleNode("font"); //$NON-NLS-1$ if (fontNode != null) { String fontStr = fontNode.getText().trim(); if (!"".equals(fontStr)) { //$NON-NLS-1$ Node valueFontSizeNode = valueFontNode.selectSingleNode("size"); //$NON-NLS-1$ int size = valueFontSizeNode != null ? Integer.parseInt(valueFontSizeNode.getText()) : 12; widgetDefinition.setValueFont(new Font(fontStr, Font.BOLD, size)); } } else { String fontStr = valueFontNode.getText().trim(); if (!"".equals(fontStr)) { //$NON-NLS-1$ widgetDefinition.setValueFont(new Font(fontStr, Font.ITALIC, 24)); } } } // set any intervals that are defined in the document // A list of interval nodes should not be allowed to exist as a child of the main XML element (for XML schema // to // be well constructed and validate the XML . // We have deprecated <interval> as a child of the main node , and now require an <intervals> parent node // under which <intervals> can exist. List intervals = dialNode.selectNodes("interval"); //$NON-NLS-1$ if ((intervals == null) || (intervals.isEmpty())) { Node intervalsNode = dialNode.selectSingleNode("intervals"); //$NON-NLS-1$ if (intervalsNode != null) { intervals = intervalsNode.selectNodes("interval"); //$NON-NLS-1$ } } else { // log a deprecation warning for this property... DialWidgetDefinition.getLogger() .warn(Messages.getInstance().getString("CHART.WARN_DEPRECATED_CHILD", "interval", "intervals")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ DialWidgetDefinition.getLogger() .warn(Messages.getInstance().getString("CHART.WARN_PROPERTY_WILL_NOT_VALIDATE", "interval")); //$NON-NLS-1$ //$NON-NLS-2$ } if (intervals != null) { Iterator intervalIterator = intervals.iterator(); while (intervalIterator.hasNext()) { // get the interval node Node intervalNode = (Node) intervalIterator.next(); // get the interval name String label = intervalNode.selectSingleNode("label").getText(); //$NON-NLS-1$ // get the range of the interval double minimum = Double.parseDouble(intervalNode.selectSingleNode("minimum").getText()); //$NON-NLS-1$ double maximum = Double.parseDouble(intervalNode.selectSingleNode("maximum").getText()); //$NON-NLS-1$ Range range = new Range(minimum, maximum); Paint backgroundPaint = JFreeChartEngine.getPaint(intervalNode.selectSingleNode("color")); //$NON-NLS-1$ if (backgroundPaint == null) { Element backgroundNode = (Element) intervalNode.selectSingleNode("interval-background"); //$NON-NLS-1$ if (backgroundNode != null) { String backgroundType = backgroundNode.attributeValue("type"); //$NON-NLS-1$ if ("texture".equals(backgroundType)) { //$NON-NLS-1$ backgroundPaint = JFreeChartEngine.getTexturePaint(backgroundNode, width, height, session); } else if ("gradient".equals(backgroundType)) { //$NON-NLS-1$ backgroundPaint = JFreeChartEngine.getGradientPaint(backgroundNode, width, height); } } } // get the text color of the interval String textColor = intervalNode.selectSingleNode("text-color").getText(); //$NON-NLS-1$ Stroke outlineStroke; if (intervalNode.selectSingleNode("stroke-width") != null) { //$NON-NLS-1$ outlineStroke = new BasicStroke( Float.parseFloat(intervalNode.selectSingleNode("stroke-width").getText())); //$NON-NLS-1$ } else { outlineStroke = new BasicStroke(); } Paint outlinePaint = JFreeChartEngine.getPaint(textColor); // create the interval object MeterInterval interval = new MeterInterval(label, range, outlinePaint, outlineStroke, backgroundPaint); // add the interval to the widget widgetDefinition.addInterval(interval); } } // get the chart subtitles // A list of <subtitle> nodes should not be allowed to exist as a child of the main XML element (for XML schema // to // be well constructed and validate the XML . // We have deprecated <subtitle> as a child of the main node , and now require a <subtitles> parent node // under which <subtitle> can exist. List subtitles = dialNode.selectNodes(ChartDefinition.SUBTITLE_NODE_NAME); if ((subtitles == null) || (subtitles.isEmpty())) { Node subTitlesNode = dialNode.selectSingleNode(ChartDefinition.SUBTITLES_NODE_NAME); if (subTitlesNode != null) { subtitles = subTitlesNode.selectNodes(ChartDefinition.SUBTITLE_NODE_NAME); } } else { // log a deprecation warning for this property... DialWidgetDefinition.getLogger().warn(Messages.getInstance().getString("CHART.WARN_DEPRECATED_CHILD", //$NON-NLS-1$ ChartDefinition.SUBTITLE_NODE_NAME, ChartDefinition.SUBTITLES_NODE_NAME)); DialWidgetDefinition.getLogger().warn(Messages.getInstance() .getString("CHART.WARN_PROPERTY_WILL_NOT_VALIDATE", ChartDefinition.SUBTITLE_NODE_NAME)); //$NON-NLS-1$ } if (subtitles != null) { widgetDefinition.addSubTitles(subtitles); } } public void setUnits(final String units) { this.units = units; } public String getUnits() { return units; } private void setDataByColumn(final IPentahoResultSet data) { setDataByRow(PentahoDataTransmuter.pivot(data)); } private void setDataByRow(final IPentahoResultSet data) { if (data == null) { noDataMessage = Messages.getInstance().getString("CHART.USER_NO_DATA_AVAILABLE"); //$NON-NLS-1$ return; } Object[] rowData = data.next(); List<Number> numericRowData = DataUtilities.toNumbers(rowData, LocaleHelper.getNumberFormat(), LocaleHelper.getCurrencyFormat()); double newValue = numericRowData.get(0).doubleValue(); // Do we have a value, minimum and maximum? if (rowData.length >= 3) { this.setMinimum(numericRowData.get(1).doubleValue()); this.setMaximum(numericRowData.get(2).doubleValue()); } else { deriveMinMax(newValue); } this.setValue(newValue); } public void deriveMinMax(final double value) { double min = 0; double max = 100; Node node = attributes.selectSingleNode("range-limited"); //$NON-NLS-1$ rangeLimited = (node == null) || ("true".equalsIgnoreCase(node.getText())); //$NON-NLS-1$ max = 0.1; double absValue = Math.abs(value); // based on the current value, to to select some sensible min and // max values while (max < absValue) { max *= 2; if (max < absValue) { min *= 2.5; max *= 2.5; } if (max < absValue) { min *= 2; max *= 2; } } if (value > 0) { min = 0; } else { min = -max; } setMaximum(max); setMinimum(min); } /** * Add an interval (MeterInterval) to the dial definition. The interval defines a range and how it should be * painted. * <p/> * The dial images here have three intervals. The lowest interval has a minimum of 0 and a maximum of 30. * <p/> * Intervals have a color. In this image the lowest interval color is set to red. <br/> * <img src="doc-files/DialWidgetDefinition-5.png"> * <p/> * Intervals have a text color. In this image the lowest interval text color is set to red. This affects the * outer rim, the interval value text <br/> * <img src="doc-files/DialWidgetDefinition-6.png"> * * @param interval * A MeterInterval that defines an interval (range) on the dial */ public void addInterval(final MeterInterval interval) { intervals.add(interval); Range range = interval.getRange(); double min = range.getLowerBound(); double max = range.getUpperBound(); if (rangeLimited && (intervals.size() == 1)) { setMinimum(min); setMaximum(max); } else { if (min < getMinimum()) { setMinimum(min); } if (max > getMaximum()) { setMaximum(max); } } } /** * Sets the value to be displayed on the dial image * * @param value * The value to be displayed */ public void setValue(final double value) { setValue(new Double(value)); if (rangeLimited) { if (value < getMinimum()) { setValue(getMinimum()); } else if (value > getMaximum()) { setValue(getMaximum()); } } else { if (value < getMinimum()) { setMinimum(value); } else if (value > getMaximum()) { setMaximum(value); } } } /** * Return the java.awt.Paint object to be used to paint the backound of the dial. * * @return The Paint to be used */ public Paint getPlotBackgroundPaint() { return plotBackgroundPaint; } /** * Return the java.awt.Paint object to be used to paint the backound of the dial. * <p/> * In this image the background paint has been set to red <br/> * <img src="doc-files/DialWidgetDefinition-2.png"> * * @return The Paint to used for the background of the image */ public void setPlotBackgroundPaint(final Paint plotBackgroundPaint) { this.plotBackgroundPaint = plotBackgroundPaint; } /** * Return the java.awt.Paint used to paint the needle of the dial image * * @return The Paint to use for the needle of this dial */ public Paint getNeedlePaint() { return needlePaint; } /** * Sets the java.awt.Paint object to be used to paint the needle of the dial image. * <p/> * In this image the needle paint has been set to red. <br/> * <img src="doc-files/DialWidgetDefinition-4.png"> * * @param needlePaint * The Paint to use for ths needle of this dial */ public void setNeedlePaint(final Paint needlePaint) { this.needlePaint = needlePaint; } /** * Return the shape to be used for the dial. * * @return DialShape The DialShape for this dial */ public DialShape getDialShape() { return dialShape; } /** * Return the java.awt.Font to be used to display the dial title * * @return Font The Font for the title of this dial */ public Font getTitleFont() { if (titleFont != null) { return titleFont; } else { return new Font("sans-serif", Font.PLAIN, 14); //$NON-NLS-1$ } } public void setTitleFont(final Font tFont) { titleFont = tFont; } /** * Sets the shape to be used for the dial. This affects the area of dial outside the range that the needle * covers. * <table> * <tr> * <td><center>CIRCLE</center></td> * <td><center>CHORD</center></td> * <td><center>PIE</center></td> * </tr> * <tr> * <td><img src="doc-files/DialWidgetDefinition-3.png"></td> * <td><img src="doc-files/DialWidgetDefinition-8.png"></td> * <td><img src="doc-files/DialWidgetDefinition-9.png"></td> * </tr> * </table> * * @param dialShape * The shape for this dial */ public void setDialShape(final DialShape dialShape) { this.dialShape = dialShape; } /** * Return a list of the intervals for the dial. Each object in the list is a MeterInterval object. * * @return List The list of MeterInterval objects for this dial */ public List getIntervals() { return intervals; } public Paint[] getPaintSequence() { return null; } public Image getPlotBackgroundImage() { return null; } public List getSubtitles() { return subTitles; } public void addSubTitles(final List subTitleNodes) { if (subTitleNodes != null) { Iterator iter = subTitleNodes.iterator(); while (iter.hasNext()) { addSubTitle(((Node) iter.next()).getText()); } } } public void addSubTitle(final String subTitle) { subTitles.add(subTitle); } public Paint getChartBackgroundPaint() { // TODO Auto-generated method stub return chartBackgroundPaint; } public Image getChartBackgroundImage() { // TODO Auto-generated method stub return null; } public boolean isBorderVisible() { // TODO Auto-generated method stub return false; } public Paint getBorderPaint() { // TODO Auto-generated method stub return null; } public RectangleEdge getTitlePosition() { return titlePosition; } public RectangleEdge getLegendPosition() { return legendPosition; } /** * @param chartBackgroundPaint * The chartBackgroundPaint to set. */ public void setChartBackgroundPaint(final Paint chartBackgroundPaint) { this.chartBackgroundPaint = chartBackgroundPaint; } public int getHeight() { // TODO Auto-generated method stub return 200; } public int getWidth() { // TODO Auto-generated method stub return 200; } public String getTitle() { return null; } public boolean isLegendIncluded() { // TODO Auto-generated method stub return false; } public boolean isThreeD() { // TODO Auto-generated method stub return false; } public Paint getValuePaint() { return valuePaint; } public Paint getTickPaint() { return tickPaint; } public int getTickSize() { return tickSize; } public void setValuePaint(final Paint valuePaint) { this.valuePaint = valuePaint; } public void setTickPaint(final Paint tickPaint) { this.tickPaint = tickPaint; } public void setTickSize(final int tickSize) { this.tickSize = tickSize; } @Override public Font getValueFont() { return valueFont; } public void setValueFont(final Font valueFont) { this.valueFont = valueFont; } public boolean isDisplayLabels() { // TODO Auto-generated method stub return false; } /** * Return the java.awt.Font to be used to display the legend items * * @return Font The font for the legend items */ public Font getLegendFont() { // TODO Auto-generated method stub return legendFont; } /** * Set java.awt.Font to be used to display the legend items * * @param Font * The java.awt.Font for the legend items */ public void setLegendFont(final Font legendFont) { this.legendFont = legendFont; } public void setLegendFont(final Node legendFontNode) { Font font = JFreeChartEngine.getFont(legendFontNode); if (font != null) { setLegendFont(font); } } public void setLegendBorderVisible(final Node legendBorderVisibleNode) { if (legendBorderVisibleNode != null) { boolean legBorderVisible = (new Boolean(legendBorderVisibleNode.getText())).booleanValue(); setLegendBorderVisible(legBorderVisible); } } /** * @param boolean legendBorderVisible Set the visibility of the legend border. */ public void setLegendBorderVisible(final boolean legendBorderVisible) { this.legendBorderVisible = legendBorderVisible; } /** * Return the boolen that states if the legend border is visible * * @return boolean Is the legend border visible */ public boolean isLegendBorderVisible() { return legendBorderVisible; } public Float getBackgroundAlpha() { return backgroundAlpha; } public void setBackgroundAlpha(Node backgroundAlphaNode) { if (backgroundAlphaNode != null) { Float backgroundAlphaValue = new Float(backgroundAlphaNode.getText()); this.backgroundAlpha = backgroundAlphaValue; } } public Float getForegroundAlpha() { return foregroundAlpha; } public void setForegroundAlpha(Node foregroundAlphaNode) { if (foregroundAlphaNode != null) { Float foregroundAlphaValue = new Float(foregroundAlphaNode.getText()); this.foregroundAlpha = foregroundAlphaValue; } } }