[news.eclipse.platform.swt] Re: Truncated SWT table column headers.

["Paul Slauenwhite" <paules@xxxxxxxxxx>]

Hi Carolyn,
    Thank you for your response.  We will consider your suggestion on 
reworking our UI.

    We have opened SWT defect 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=251379 to track this 
limitation in TPTP.

>> Note, we have proven that this is not a SWT defect and is an issue with 
>> our code.

    Note, after adding more columns to our SWT example code, we were able to 
reproduce the this symptom.

Thanks,
Paul
"Carolyn MacLeod" <Carolyn_MacLeod@xxxxxxxxxx> wrote in message 
news:gd7qd3$p6l$1@xxxxxxxxxxxxxxxxxxxx
> Hi, Paul.
>
> You seem to have run across a Windows limitation.
> Can you get away with reducing your column header string to include only 
> the essentials?
> i.e. The following snippet shows 444 columns, and if I set the column 
> width to 50 instead of packing, then it shows 654.
> What is the maximum number of columns that your application needs?
>
> import org.eclipse.swt.*;
> import org.eclipse.swt.widgets.*;
> import org.eclipse.swt.layout.*;
>
> public class TableManyHeadersTest {
>
> static final int COLUMN_COUNT = 1000;
> static final int ROW_COUNT = 5;
>
> public static void main(String[] args) {
>  Display display = new Display();
>  Shell shell = new Shell(display);
>  shell.setLayout(new GridLayout());
>
>  Table table = new Table(shell, SWT.FULL_SELECTION);
>  table.setLayoutData(new GridData(GridData.FILL_BOTH));
>  table.setHeaderVisible(true);
>  for (int col = 0; col < COLUMN_COUNT; col++) {
>   TableColumn column = new TableColumn(table, SWT.NONE);
>   column.setText("V" + col + "::String");
> //   column.setWidth(50);
>   column.pack();
>  }
>  for (int row = 0; row < ROW_COUNT; row++) {
>   TableItem item = new TableItem(table, SWT.NONE);
>   for (int col = 0; col < COLUMN_COUNT; col++) {
>    item.setText(col, "R" + row + "C" + col);
>   }
>  }
>
>  shell.pack();
>  shell.open();
>  while (!shell.isDisposed()) {
>   if (!display.readAndDispatch()) display.sleep();
>  }
> }
> }
>
> The only other suggestion I have is to consider refactoring your UI into 
> maybe a tabfolder of 100-column tables or something like that.
>
> Hope this helps,
> Carolyn
>
> "Paul Slauenwhite" <paules@xxxxxxxxxx> wrote in message 
> news:gd4oa0$e0j$1@xxxxxxxxxxxxxxxxxxxx
>> SWT Experts,
>>
>> We have found a problem with a SWT table in our project (TPTP) that is 
>> proving to be difficult to debug.  When the table has a large number of 
>> columns (e.g. 329 or more), the 329th column header is truncated (see 
>> attached screen capture - note, the first column is 'Variable0::String') 
>> and the remaining column headers (330+) are missing.  It appears to be a 
>> limit on the width of the column header row since the columns that do 
>> appear can be resized (e.g. reducing their size make the remaining column 
>> headers (330+) appear) and reducing the width of each table column will 
>> display more column headers.
>>
>> Has anyone seen this type of behaviour before?  If so, what was the 
>> solution?  If not, are there any tips on debugging such a problem?
>>
>> Note, we have proven that this is not a SWT defect and is an issue with 
>> our code.
>>
>> Thanks in advance,
>> Paul
>>
>>
>
>