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Single cell sellection in SWT table from keyboard

Posted on 2004-08-06
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Last Modified: 2007-12-19
I have following problem.
In SWT table I should edit cells from the keyboard.
After end of editing of first column cursor on pressing Enter should pass to the following column (second) etc.
When I use of style:      int style =      SWT.SINGLE | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION
full line is selected, but I need only one cell.
Now I can specify a cell for editing only through the mouse, but I need edit table from keyboard.

Thank you
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Question by:oraelbis
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6 Comments
 
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Expert Comment

by:JohnnyAffa
ID: 11741655
can you post you code here becuse im not really sure what you are talking about
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Author Comment

by:oraelbis
ID: 11742065
Now I have full row selection see:
http://berdachuk.at.tut.by/temp/table1.gif
But I need something leke
http://berdachuk.at.tut.by/temp/table2.gif


There is some code (itemList - data model)

private void createTable(Composite parent) {
            int style =
                  SWT.SINGLE
                        | SWT.BORDER
                        | SWT.H_SCROLL
                        | SWT.V_SCROLL
                        | SWT.FULL_SELECTION;
            

            table = new Table(parent, style);

            GridData gridData = new GridData(GridData.FILL_BOTH);
            gridData.grabExcessVerticalSpace = true;
            gridData.horizontalSpan = 3;

            table.setLayoutData(gridData);

            table.setLinesVisible(true);
            table.setHeaderVisible(true);
            

            TableColumn column0 = new TableColumn(table, SWT.NONE, 0);
            column0.setText(itemList.getColumnHeading(0));
            column0.setAlignment(SWT.LEFT);
            column0.setWidth(150);

            TableColumn column1 = new TableColumn(table, SWT.NONE, 1);
            column1.setText(itemList.getColumnHeading(1));
            column1.setAlignment(SWT.LEFT);
            column1.setWidth(150);

            TableColumn column2 = new TableColumn(table, SWT.NONE, 2);
            column2.setText(itemList.getColumnHeading(2));
            column2.setAlignment(SWT.LEFT);
            column2.setWidth(200);

            TableColumn column3 = new TableColumn(table, SWT.NONE, 3);
            column3.setText(itemList.getColumnHeading(3));
            column3.setAlignment(SWT.LEFT);
            column3.setWidth(150);
      }

      private void createTableViewer() {

            tableViewer = new TableViewer(table);
            tableViewer.setUseHashlookup(true);

            tableViewer.setColumnProperties(itemList.columnNames);

            //Initialise cell editors
            CellEditor editors[] = new CellEditor[itemList.columnNames.length];

            editors[0] = new TextCellEditor(table);

            editors[1] = new TextCellEditor(table);

            editors[2] = new TextCellEditor(table);

            //      Column 3  (Combo Box)
            editors[3] =
                  new ComboBoxCellEditor(
                        table,
                        itemList.getConfirmModes(),
                        SWT.READ_ONLY);

            tableViewer.setColumnProperties(itemList.columnNames);
            //Assign the cell editors to the viewer
            tableViewer.setCellEditors(editors);
            // Set the cell modifier for the viewer
            tableViewer.setCellModifier(new ItemListCellModifier(itemList));
      }


/////////////////////////////////////////////////////////////////////////////////////////
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.swt.widgets.TableItem;

/**
 * @author sberdachuk
 * */
public class ItemListCellModifier implements ICellModifier {
      private ItemList itemList = null;
      /**
       *
       */
      public ItemListCellModifier(ItemList itemList) {
            super();
            this.itemList = itemList;
      }

      public void modify(Object element, String property, Object value) {
            int columnIndex = itemList.getColumnNames().indexOf(property);
            TableItem item = (TableItem) element;
            Item r = (Item) item.getData();
            String valueString;
            switch (columnIndex) {
                  case 0 :
                        itemList.setData(r.getRowIndex(), columnIndex, (String) value);
                        break;
                  case 1 :
                        itemList.setData(r.getRowIndex(), columnIndex, (String) value);
                        break;
                  case 2 :
                        itemList.setData(r.getRowIndex(), columnIndex, (String) value);
                        break;
                  case 3 :
                        valueString =
                              itemList
                                    .getConfirmModes()[((Integer) value)
                                    .intValue()]
                                    .trim();
                        String s = r.getString(3);
                        if (!s.equals(valueString)) {
                              r.setData(columnIndex, valueString);
                        }
                        break;
                  default :
                        }

      }

      public boolean canModify(Object element, String property) {
            return true;
      }

      public Object getValue(Object element, String property) {
            Item r = (Item) element;
            int columnIndex = itemList.getColumnNames().indexOf(property);
            String stringValue = r.getString(columnIndex);
            if (columnIndex == 3) {
                  String[] choices = itemList.getConfirmModes(property);
                  int i = choices.length - 1;
                  while (!stringValue.equals(choices[i]) && i > 0)
                        --i;
                  return new Integer(i);

            } else {
                  return stringValue;
            }
      }
}
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LVL 3

Expert Comment

by:JohnnyAffa
ID: 11752775
when you mean keyboard, do you mean command line?  
where is your InputStream object?
mouse? so its a gui interface and yet you can enter value from the command line?

is this your code or someone elses?

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LVL 3

Author Comment

by:oraelbis
ID: 11762876
This is GUI application with org.eclipse.swt library.
I need have access for table like spreadshet in MS Excell.
After editing first cell I need select next cell and etc.  
At current time I can select any cell for editing only with mice clicking.
I'd like do it from keyboard
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Accepted Solution

by:
JohnnyAffa earned 300 total points
ID: 11773667
first of all, im not familiar with the org.eclipse.library class.  however, if its similar to javax.swing.Jtable class then all you need to do is add a key listener/cell listener to your table  eg (in swing)

JTable table = new JTable([object]);

table.addKeyListener(this);

public void keyPressed(KeyEvent event)
{
             if ( event.getKeyCode() == KeyEvent.VK_RIGHT ) // right arrow
             {
                      Object object = event.getSource(); // here you get a reference to the cell
                 // move to next cell
              }

}

i hope that helps a little, but like i said, i dont know anything about eclipse.libaray class
0
 
LVL 3

Author Comment

by:oraelbis
ID: 11928910
Thank you for advice. But this problem still exist. May be I rewrite code for using my own combined swt widgets.
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