How can I align a variable height lastPageFooter in Jasper reports jrxml to the bottom of the page?

1
votes

I have the following report:

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"
              name="demo" pageWidth="595" pageHeight="842" columnWidth="515" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
    <style name="highlight box" mode="Opaque" backcolor="#D9D9D9">
        <box padding="2" />
    </style>


    <lastPageFooter>
        <band height="30">
            <textField isStretchWithOverflow="true">
                <reportElement style="highlight box" x="0" y="0" width="320" height="1" />
                <textFieldExpression><![CDATA["This is a short footer content\nIt contains multiple lines"]]></textFieldExpression>
            </textField>
        </band>
    </lastPageFooter>
</jasperReport>

As you can see the report contains nothing but the lastPageFooter which contains a text field width dynamic (isStretchWithOverflow="true") height.

However it appears that Jasper will place the lastPageFooter always so that is begins 30pixels (as defined in <band height="30">) before the end of the page. If 30 pixels is not enough due to the height of the textField, the band is stretched, but it is stretched downward, past the end of the page rather than upward. This causes some of the content of the footer not to be rendered. Actually the report above renders like this:

screenshot of incomplete footer

As you can see the second line in the textField is missing. I can of course increase the band height to let's say... 100 pixel:

footer with height 100px: Not at the bottom of the page

In this case the second line of the text field is rendered, but 100px was clearly too much and the footer is not at the end of the page anymore.

In this case the text field contains static text so I could try values for height, so that this fits, but in the real world the content of the text field comes from a variable. How can I get the footer to show at the bottom of the page with a dynamic height?

1
jasper-reports

1 Answers

-1
votes

Try changing the Split Type on the Page Footer. You could try "Stretch" or "Prevent".