If you look closely at my example, I'm not using IColumn from
wicket-extensions, but rather my own interface, ReportColumn.
ReportColumn defines a couple of methods to address just what you need:
IModel getHeadingModel();
Object getCellValue(IModel rowModel);
It's not very complex to roll your own implementation.
jk
On Thu, Jun 26, 2008 at 12:52:56PM -0700, nanotech wrote:
>
> I am trying to integrate iText on the lines of example provided by "John
> Krasnay" below.
> My question is :
> 1. While iterating over the list of IColumn .....How to I get hold of the
> column's headers which I had created earlier using...(See TODO::1)
> final List<IColumn> columns = new ArrayList<IColumn>();
> columns.add(new PropertyColumn(new Model("Author"), "author") ;
> 2. Also, How would I get hold of the contents of the column(See
> TODO::2)...the way it is now...it always gets the Author property of
> POJO.....but i don't understand how to get hold of the contents of current
> column being rendered.
>
> ~ Any suggestions?
> public void generatePDF(OutputStream outputStream, List<IColumn>
> columns,
> IDataProvider dataProvider) throws IOException {
>
> try {
> Document document = new Document(PageSize.A4, 50, 50,
> 50, 50);
> PdfWriter writer = PdfWriter.getInstance(document, new
> FileOutputStream("C:\\Test2.pdf"));
> document.open();
> Table t = new Table(columns.size(),
> dataProvider.size());
> t.setBorderColor(new Color(220, 255, 100));
> t.setPadding(1);
> t.setSpacing(0);
> t.setBorderWidth(0);
>
> for (Iterator iterator = columns.iterator();
> iterator.hasNext();) {
> //TODO::1: Get hold of column's model and add
> to table
> // that we are generating with iText
>
> }
> Iterator iter = dataProvider.iterator(0,
> dataProvider.size());
>
> while (iter.hasNext()) {
> Object o = iter.next();
> IModel rowModel = dataProvider.model(o);
> // Get the POJO for the row....
> MyPOJO doc = (MyPOJO) rowModel.getObject();
>
> for (short i = 0; i < columns.size(); i++) {
> // TODO::2: How will we know what kind
> of property it is...
> Cell cell = new Cell(doc.getAuthor());
> t.addCell(cell);
> }
> }
> document.add(t);
> document.close();
>
> } catch (BadElementException e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> } catch (DocumentException e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
>
>
>
>
>
>
>
>
>
>
> Ricky-22 wrote:
> >
> > that is sweet, thanks, i'll try it out. Appreciate it. :)
> >
> > Rick
> >
> > On Wed, Apr 16, 2008 at 9:50 PM, John Krasnay <[EMAIL PROTECTED]> wrote:
> >
> >> It goes something like this. I've left out a bunch of stuff to do with
> >> setting column headings, widths, and styles.
> >>
> >> public interface ReportColumn extends Serializable {
> >> public Object getCellValue(IModel rowModel);
> >> }
> >>
> >> public class ExcelReportGenerator implements ReportGenerator {
> >> public void generate(
> >> OutputStream outputStream,
> >> ReportColumn[] columns,
> >> IDataProvider dataProvider) throws IOException {
> >>
> >> HSSFWorkbook workbook = new HSSFWorkbook();
> >> HSSFSheet sheet = workbook.createSheet();
> >>
> >> Iterator iter = dataProvider.iterator(0, dataProvider.size());
> >> while (iter.hasNext()) {
> >> Object o = iter.next();
> >> IModel rowModel = dataProvider.model(o);
> >> row = sheet.createRow(rownum++);
> >> for (short i = 0; i < columns.length; i++) {
> >> HSSFCell cell = row.createCell(columnNumber,
> >> HSSFCell.CELL_TYPE_STRING);
> >> Object value = column.getCellValue(rowModel);
> >> cell.setCellValue(new
> >> HSSFRichTextString(value.toString()));
> >> }
> >> }
> >>
> >> workbook.write(outputStream);
> >> }
> >> }
> >>
> >>
> >> We then use a Link with code like this in its onClick method:
> >>
> >> public void onClick() {
> >> final ReportGenerator generator = getReportGenerator();
> >>
> >> IResourceStream resourceStream =
> >> new AbstractResourceStreamWriter() {
> >> public void write(OutputStream output) {
> >> try {
> >> generator.generate(output, columns, dataProvider);
> >> } catch (IOException e) {
> >> throw new RuntimeException(e);
> >> }
> >> }
> >> public String getContentType() {
> >> return generator.getContentType();
> >> }
> >>
> >> };
> >>
> >> getRequestCycle().setRequestTarget(
> >> new ResourceStreamRequestTarget(resourceStream)
> >> .setFileName(getFileName()));
> >> }
> >>
> >>
> >> jk
> >>
> >> On Wed, Apr 16, 2008 at 09:25:41PM -0400, Ricky wrote:
> >> > Can someone post some code on this ? (only rough sketch ... nothing
> >> > elaborate really.
> >> >
> >> > Thanks in advance.
> >> > Rick
> >> >
> >> > On Wed, Apr 16, 2008 at 8:54 PM, John Krasnay <[EMAIL PROTECTED]> wrote:
> >> >
> >> > > Hi RG,
> >> > >
> >> > > You probably want to look at how DataTable in wicket-extensions
> >> works.
> >> > > The idea is you set up an array of column objects, each of which
> >> knows
> >> > > how to display the data in a particular column, and a data provider,
> >> > > which provides an iterator over the objects represent your rows. The
> >> > > DataTable puts these two together and renders an HTML table.
> >> > >
> >> > > You can tackle your PDF problem in a similar way. Create a different
> >> > > column abstraction that writes to the iText API, then create a
> >> component
> >> > > analagous to DataTable but that writes the PDF out to a stream.
> >> > > Internally, this DataTable-equivalent would create the iText
> >> document,
> >> > > iterate over the rows returned by the data provider, and for each row
> >> > > iterate over the columns, asking each column to render its particular
> >> > > cell.
> >> > >
> >> > > We use this approach for generating spreadsheets (using POI instead
> >> of
> >> > > iText, of course) and it works like a charm.
> >> > >
> >> > > jk
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: [EMAIL PROTECTED]
> >> For additional commands, e-mail: [EMAIL PROTECTED]
> >>
> >>
> >
> >
> > --
> >
> > Regards
> > Vyas, Anirudh
> > || ॐ ||
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Wicket-%2B-iText---tp16733269p18141986.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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