Change font size of fields at run-time?

[2005 IR Help]

By: Vital - vitalsim

Change font size of fields at run-time?

2003-01-07 03:52

I have a report design specified in a XML file. I would like to change the font size of all the fields on my report design at run-time.

 

User would choose the font size that is to be set for the fields. I am using JRXmlLoader class to get the JasperDesign object, but am not sure of how to change the field properties ...

 

Can anybody help me in this regard?

 

Thanks in advance.

 

Vital

 

 

 

 

By: Teodor Danciu - teodord

RE: Change font size of fields at run-time?

2003-01-07 04:50

 

Hi,

 

The best approach would be to not specify

the font size for the text elements that required

dynamic font size.

Instead, you point these text elements to use

a report level font definition using the "reportFont"

attribute.

 

This will allow you to change the font size by

retrieveing the report font definition from the

JasperDesign object by calling the getFontsMap()

method and using the report font name as key.

Then, if you affect the font size in the report font

object, all the text elements that make reference

to this report font will use the new font size value,

but only if they do not override the size as

mentioned above.

 

Modifying the font size in the JasperDesign object

does not require you to recompile the report design.

 

I hope this helps.

Teodor

 

 

 

 

 

By: Vital - vitalsim

RE: Change font size of fields at run-time?

2003-01-07 05:03

Sounds a better approach ... Shall try and let you know the result.

 

Thanks Teodor

 

 

 

 

By: Vital - vitalsim

RE: Change font size of fields at run-time?

2003-01-07 06:23

Ok Teodor. Even i shall try for other alternatives and update you if i find one.

 

Thanks,

Vital

 

 

 

 

By: Teodor Danciu - teodord

RE: Change font size of fields at run-time?

2003-01-07 06:32

 

Hi,

 

I think in the future we shall introduce the possibility

to name the report elements so that you can easily

access them by their name when wanting to modify

their settings at runtime.

 

Thank you,

Teodor

 

 

 

 

 

By: Vital - vitalsim

RE: Change font size of fields at run-time?

2003-01-07 07:16

That should solve most of the issues...i had this question at the back of mind from a long time.

 

Anyhow, thanks for your constant support.

 

Vital

 

 

 

 

By: Vital - vitalsim

RE: Change font size of fields at run-time?

2003-01-07 05:46

Teodor,

 

I tried the option suggested by you..

 

Defined a new report font and applied it to the desired textfields on the report.

 

Though i'm successfull in changing the font size by getting the JRDesignReportFont from the fonts Map, the new font size is not applied to the textfields having this report font.

 

Do I need to set any additional attributes either to the defined report font or the text fields using this font...

 

Following is the reportFont definition:

<reportFont name="runtimeFont" isDefault="false" fontName="sansserif" size="5" isBold="false" isItalic="false" isUnderline="false" isStrikeThrough="false" pdfFontName="Helvetica" pdfEncoding="CP1252" isPdfEmbedded="false"/>

 

Static Text using the above report font:

<staticText>

<reportElement

mode="Transparent"

x="184"

y="75"

width="159"

height="31"

forecolor="#000000"

backcolor="#FFFFFF"

positionType="FixRelativeToTop"

isPrintRepeatedValues="true"

isRemoveLineWhenBlank="false"

isPrintInFirstWholeBand="false"

isPrintWhenDetailOverflows="false"/>

<textElement textAlignment="Center" lineSpacing="Single">

<font fontName="sansserif" reportFont="runtimeFont" pdfFontName="Helvetica" size="5" isBold="false" isItalic="false" isUnderline="false" isPdfEmbedded ="false" pdfEncoding ="Cp1252" isStrikeThrough="false" />

</textElement>

<text><![CDATA[Runtime Font]]></text>

</staticText>

 

Java code to change the font size dynamically,

JasperDesign jasperDesign = JRXmlLoader.load(fileName);

 

Map fontMap = jasperDesign.getFontsMap();

 

JRDesignReportFont reportFont = (JRDesignReportFont) fontMap.get("runtimeFont");

reportFont.setSize(25); JasperCompileManager.compileReportToFile(jasperDesign,"RuntimeReport.jasper");

 

Thanks

Vital

 

 

 

 

By: Teodor Danciu - teodord

RE: Change font size of fields at run-time?

2003-01-07 06:04

 

Hi,

 

On a second thought, you might be right.

Apparently I have misled you.

Sorry ...

 

In fact, the <reportFont> tag acts like an XML

simplifier than a real font subclassing mechanism.

I forgot about that...

 

I'll study this in detail before jumping

into conclusions.

 

Thank you,

Teodor

 

 

 

 

 

By: protifar ipo - protifar

RE: Change font size of fields at run-time?

2004-02-11 23:43

hi,

 

how should I do if I want to set the font position dynamically(actually in the run time)?

 

 

 

 

By: protifar ipo - protifar

RE: Change font size of fields at run-time?

2004-02-12 00:22

I'm sorry...

I mean "text" position rather than "font" position

 

 

 

 

By: Teodor Danciu - teodord

RE: Change font size of fields at run-time?

2004-02-14 03:15

 

Hi,

 

You can change some of the element settings

at runtime.

Check the "alterdesign" sample and the API

documentation to see what settings can be altered

without need for report design recompilation.

 

But the modifications you make for an element can be

made only prior to launching the report filling process

and will affect all the document.

In other words, you cannot change a setting with

each row in the data source.

If you want this, you can only achieve it with this

trick here:

 

http://jasperreports.sourceforge.net/tips.tricks.html#formatting

 

I hope this helps.

Teodor