IText trouble with automatically adjustment of table width

Question

With iText I an producing a PDF file with some elements. One of these is a table which is supposed to be centered.
In this table 2x2 with input form a Servlet. This input is a string of variable length, in other words I do not know the length of it.
I want this table to automatically adjust the cells width according to the length of the String. As I understand iText does not posess this functionality.
This is how I have created the table: The first column has a width of 0.3 because the values in those I allready know. The default value is centered and 80% span, and because of this the table is not centered according to the text since the content contains empty space, but the 80% span table is centered.
PdfPTable table = new PdfPTable(2);
float[] widths = { 0.3f, 0.8f };
table.setWidths(widths);How could I calculate this? The string has a font size of 22pt. Could I check for the number of chars in the String and adjust the width accordingly? It seems like I need to set the table.setWidthPercentage(50) in addition to the width size. But if I dont know the relationship between the width and percentages.
If I calculate the width to be 0.6f with font size 22 and length x, how much percentages should I use?
Message was edited by:
DJ_Viking
Message was edited by:
DJ_Viking

Answer 1

You need to use FontMetrics. In particular, use the FontMetrics of the table's renderer component so the string width will be calculated correctly even if the cell's value is bold. Something like this:
Component comp = table.getDefaultRenderer(Object.class).getTableCellRendererComponent(table, cellValue, false, false, row, column);
FontMetrics fm = comp.getFontMetrics(comp.getFont());
int cellWidth = fm.stringWidth(cellValue);
table.getColumnModel().getColumn(column).setWidth(cellWidth);