/***********************************************************************************************
* File Info: $Id: ValueLabelRenderer.java,v 1.3 2004/05/31 16:23:03 nathaniel_auvil Exp $
* Copyright (C) 2002
* Author: Nathaniel G. Auvil, John Thomsen
* Contributor(s):
*
* Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation ("Software"), with or
* without modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and notices.
* Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
* products derived from this Software without prior written permission of Nathaniel G.
* Auvil. For written permission, please contact nathaniel_auvil@users.sourceforge.net
*
* 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
* in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
* registered trademark of Nathaniel G. Auvil.
*
* 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
*
* THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
************************************************************************************************/
package org.krysalis.jcharts.axisChart.customRenderers.axisValue.renderers;
import org.krysalis.jcharts.axisChart.AxisChart;
import org.krysalis.jcharts.axisChart.customRenderers.axisValue.AxisValueRenderEvent;
import org.krysalis.jcharts.axisChart.customRenderers.axisValue.PostAxisValueRenderListener;
import org.krysalis.jcharts.chartData.interfaces.IAxisChartDataSet;
import org.krysalis.jcharts.chartText.NumericTagGroup;
import org.krysalis.jcharts.chartText.TextTag;
import org.krysalis.jcharts.properties.util.ChartFont;
import com.google.code.appengine.awt.*;
import java.text.NumberFormat;
public class ValueLabelRenderer implements PostAxisValueRenderListener
{
private NumberFormat numberFormat;
private ChartFont valueChartFont = ChartFont.DEFAULT_AXIS_VALUE;
//---holds the derived Font if needed so don't have to recalculate it each time.
private Font derivedFont;
//---vertical labels are only used when plotting on vertical charts; not used for horizontal bar plots.
private boolean isLabelVertical = false;
private ValueLabelPosition valueLabelPosition = ValueLabelPosition.ON_TOP;
private int pixelValuePadding = 4;
/**********************************************************************************
*
* @param isCurrency
* @param showGrouping
* @param roundingPowerOfTen
* @deprecated use the other Constructor
**********************************************************************************/
public ValueLabelRenderer( boolean isCurrency, boolean showGrouping, int roundingPowerOfTen )
{
this.numberFormat = NumericTagGroup.getNumberFormatInstance( isCurrency, false, showGrouping, roundingPowerOfTen );
}
/**********************************************************************************
*
* @param isCurrency
* @param isPercent
* @param showGrouping
* @param roundingPowerOfTen
**********************************************************************************/
public ValueLabelRenderer( boolean isCurrency, boolean isPercent, boolean showGrouping, int roundingPowerOfTen )
{
this.numberFormat = NumericTagGroup.getNumberFormatInstance( isCurrency, isPercent, showGrouping, roundingPowerOfTen );
}
/************************************************************************************
* Sets where you would like to position the label
*
* @param valueLabelPosition
***********************************************************************************/
public void setValueLabelPosition( ValueLabelPosition valueLabelPosition )
{
this.valueLabelPosition = valueLabelPosition;
}
/************************************************************************************
*
* @param valueChartFont
***********************************************************************************/
public void setValueChartFont( ChartFont valueChartFont )
{
this.valueChartFont = valueChartFont;
}
/***********************************************************************************
*
* @param useVerticalLabels
**********************************************************************************/
public void useVerticalLabels( boolean useVerticalLabels )
{
this.isLabelVertical = useVerticalLabels;
//---set this here so can reuse same font
if( this.isLabelVertical )
{
this.derivedFont = this.valueChartFont.deriveFont();
}
}
/***********************************************************************************
* The pixel padding between the label and the data point.
*
* @param pixelValuePadding
**********************************************************************************/
public void setPixelValuePadding( int pixelValuePadding )
{
this.pixelValuePadding = pixelValuePadding;
}
/***********************************************************************************
*
* @param axisValueRenderEvent
***********************************************************************************/
public void postRender( AxisValueRenderEvent axisValueRenderEvent )
{
AxisChart axisChart = (AxisChart) axisValueRenderEvent.getSource();
TextTag valueTag;
float x;
float y;
if( axisValueRenderEvent.getiAxisPlotDataSet() instanceof IAxisChartDataSet )
{
IAxisChartDataSet iAxisChartDataSet = (IAxisChartDataSet) axisValueRenderEvent.getiAxisPlotDataSet();
double value = iAxisChartDataSet.getValue( axisValueRenderEvent.getDataSetIndex(), axisValueRenderEvent.getValueIndex() );
valueTag = new TextTag( this.numberFormat.format( value ),
this.valueChartFont.getFont(),
this.derivedFont,
axisValueRenderEvent.getFontRenderContext() );
if( axisChart.getAxisProperties().isPlotHorizontal() )
{
x = this.calculateXHorizontalPlot( axisValueRenderEvent, valueTag, (value < 0) );
y = this.calculateYHorizontalPlot( axisValueRenderEvent, valueTag );
}
else
{
x = this.calculateXVerticalPlot( axisValueRenderEvent, valueTag );
y = this.calculateYVerticalPlot( axisValueRenderEvent, valueTag, (value < 0) );
}
}
else
{
//todo scatter and hi/low
valueTag = null;
x = 100;
y = 100;
throw new RuntimeException( "Axis Values not yet implemented for this type of chart." );
}
/*
Line2D.Float line= new Line2D.Float( x, y, x, y -20 );
axisValueRenderEvent.getGraphics2D().draw( line );
*/
valueTag.setXPosition( x );
valueTag.setYPosition( y );
valueTag.render( axisValueRenderEvent.getGraphics2D(), this.valueChartFont.getPaint() );
}
/*************************************************************************************************
* Calculates the label x so that the label is centered on the scale item.
*
* @param axisValueRenderEvent
* @param formattedTextTag
* @return float
************************************************************************************************/
private float calculateXVerticalPlot( AxisValueRenderEvent axisValueRenderEvent, TextTag formattedTextTag )
{
float x = axisValueRenderEvent.getValueX();
if( this.isLabelVertical )
{
x += formattedTextTag.getFontDescent();
}
else
{
x -= (formattedTextTag.getWidth() / 2);
}
return x;
}
/*************************************************************************************************
*
* @param axisValueRenderEvent
* @param formattedTextTag
* @return float
************************************************************************************************/
private float calculateYHorizontalPlot( AxisValueRenderEvent axisValueRenderEvent,
TextTag formattedTextTag )
{
float y = axisValueRenderEvent.getValueY();
if( this.isLabelVertical )
{
y += (formattedTextTag.getWidth() / 2);
}
else
{
y += formattedTextTag.getFontDescent();
}
return y;
}
/*************************************************************************************************
*
* @param axisValueRenderEvent
* @param formattedTextTag
* @param isNegative
************************************************************************************************/
private float calculateXHorizontalPlot( AxisValueRenderEvent axisValueRenderEvent,
TextTag formattedTextTag,
boolean isNegative )
{
float x = axisValueRenderEvent.getValueX();
if( this.valueLabelPosition.equals( ValueLabelPosition.ON_TOP ) )
{
//---if the value is negative, 'top' is to the left
if( isNegative )
{
x -= (this.isLabelVertical) ? 0 : formattedTextTag.getWidth();
x -= this.pixelValuePadding;
}
else
{
x += (this.isLabelVertical) ? formattedTextTag.getFontAscent() : 0;
x += this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AT_TOP ) )
{
if( isNegative )
{
x += (this.isLabelVertical) ? formattedTextTag.getFontAscent() : 0;
x += this.pixelValuePadding;
}
else
{
x -= (this.isLabelVertical) ? formattedTextTag.getFontDescent() : formattedTextTag.getWidth();
x -= this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.ABOVE_ZERO_LINE ) )
{
x = axisValueRenderEvent.getZeroLineCoordinate();
if( isNegative )
{
x += (this.isLabelVertical) ? formattedTextTag.getFontAscent() : 0;
x += this.pixelValuePadding;
}
else
{
x -= (this.isLabelVertical) ? formattedTextTag.getFontDescent() : formattedTextTag.getWidth();
x -= this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AXIS_TOP ) )
{
x = axisValueRenderEvent.getTotalItemAxisArea().x + axisValueRenderEvent.getTotalItemAxisArea().width;
x -= (this.isLabelVertical) ? 0 : formattedTextTag.getWidth();
x -= this.pixelValuePadding;
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AXIS_BOTTOM ) )
{
x = axisValueRenderEvent.getTotalItemAxisArea().x;
x += (this.isLabelVertical) ? formattedTextTag.getFontAscent() : 0;
x += this.pixelValuePadding;
}
//VALIDATION - force labels into plot area, in case there is a user defined scale.
//todo could we skip this validation for non-user defined scales?
//---if label goes off the right edge, force it to stay in the plot area.
if( (x + formattedTextTag.getWidth())
> (axisValueRenderEvent.getTotalItemAxisArea().x + axisValueRenderEvent.getTotalItemAxisArea().width) )
{
x = axisValueRenderEvent.getTotalItemAxisArea().x + axisValueRenderEvent.getTotalItemAxisArea().width;
x -= formattedTextTag.getWidth();
x -= this.pixelValuePadding;
}
//---if label goes off left edge, force to the right
else if( x < axisValueRenderEvent.getTotalItemAxisArea().x )
{
x = axisValueRenderEvent.getTotalItemAxisArea().x;
x += this.pixelValuePadding;
}
return x;
}
/*************************************************************************************************
*
* @param axisValueRenderEvent
* @param formattedTextTag
* @param isNegative
************************************************************************************************/
private float calculateYVerticalPlot( AxisValueRenderEvent axisValueRenderEvent,
TextTag formattedTextTag,
boolean isNegative )
{
float y = axisValueRenderEvent.getValueY();
if( this.valueLabelPosition.equals( ValueLabelPosition.ON_TOP ) )
{
//---if the value is negative, 'top' is to the bottom
if( isNegative )
{
y += (this.isLabelVertical) ? formattedTextTag.getWidth() : formattedTextTag.getHeight();
y += this.pixelValuePadding;
}
else
{
y -= this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AT_TOP ) )
{
//---if the value is negative, 'top' is to the bottom
if( isNegative )
{
y -= this.pixelValuePadding;
}
else
{
y += (this.isLabelVertical) ? formattedTextTag.getWidth() : formattedTextTag.getHeight();
y += this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.ABOVE_ZERO_LINE ) )
{
y = axisValueRenderEvent.getZeroLineCoordinate();
//---if the value is negative, 'top' is to the bottom
if( isNegative )
{
y -= this.pixelValuePadding;
}
else
{
y += (this.isLabelVertical) ? formattedTextTag.getWidth() : formattedTextTag.getHeight();
y += this.pixelValuePadding;
}
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AXIS_TOP ) )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y;
y += (this.isLabelVertical) ? formattedTextTag.getWidth() : formattedTextTag.getHeight();
y += this.pixelValuePadding;
}
else if( this.valueLabelPosition.equals( ValueLabelPosition.AXIS_BOTTOM ) )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y + axisValueRenderEvent.getTotalItemAxisArea().height;
y -= this.pixelValuePadding;
}
//VALIDATION - force labels into plot area, in case there is a user defined scale.
if( isLabelVertical )
{
//---if label goes off the bottom edge, force it to stay in the plot area.
if( ( y - formattedTextTag.getWidth() ) < axisValueRenderEvent.getTotalItemAxisArea().y )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y;
y += formattedTextTag.getWidth();
y += this.pixelValuePadding;
}
//---if label goes off bottom edge, force to the up
else if( y > axisValueRenderEvent.getTotalItemAxisArea().y + axisValueRenderEvent.getTotalItemAxisArea().height )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y + axisValueRenderEvent.getTotalItemAxisArea().height;
y -= this.pixelValuePadding;
}
}
else
{
//---if label goes off the top edge, force it to stay in the plot area.
if( ( y - formattedTextTag.getHeight() ) < axisValueRenderEvent.getTotalItemAxisArea().y )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y;
y += formattedTextTag.getHeight();
y += this.pixelValuePadding;
}
//---if label goes off bottom edge, force to the up
else if( y > axisValueRenderEvent.getTotalItemAxisArea().y + axisValueRenderEvent.getTotalItemAxisArea().height )
{
y = axisValueRenderEvent.getTotalItemAxisArea().y + axisValueRenderEvent.getTotalItemAxisArea().height;
y -= this.pixelValuePadding;
}
}
return y;
}
}