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Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Keyboard navigation withTablecursor
Keyboard navigation withTablecursor [message #460573] Wed, 31 August 2005 18:46
Shilpa Toraskar is currently offline Shilpa ToraskarFriend
Messages: 102
Registered: July 2009
Senior Member
I am trying to do keyboard navigation for table which has tablecursor. The
problem I am facing is when I put TableCursor on the table, I cannot
navigate within the table using arrow keys. Attached is Snippet96
modified. I just put couple of labels and Text before table. If I am
navigating using Tab, you will notice that control gets moved from first
text to 2nd text directly without going to table. But if I comment out
TableCursor code, control goes to table when I use tab and then I can
select rows using arrow up/down keys. How do I make sure control goes to
table when I use TableCuror using keyboard ?

Thanks in advance..

------------------------------------------------------------ ---------------

import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet96 {

public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new GridLayout(2, false));

Label label = new Label(shell, SWT.NONE);
label.setText("Test");

Text text = new Text(shell, SWT.NONE);


// create a a table with 3 columns and fill with data
final Table table = new Table(shell, SWT.BORDER | SWT.MULTI |
SWT.FULL_SELECTION);
GridData gd = new GridData(GridData.FILL_BOTH);
gd.horizontalSpan = 2;
table.setLayoutData(gd);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
for (int i = 0; i < 100; i++) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] {"cell " + i + " 0", "cell " + i + " 1", "cell "
+ i + " 2" });
}
column1.pack();
column2.pack();
column3.pack();

// create a TableCursor to navigate around the table
final TableCursor cursor = new TableCursor(table, SWT.NONE);
// create an editor to edit the cell when the user hits "ENTER" // while
over a cell in the table
final ControlEditor editor = new ControlEditor(cursor);
editor.grabHorizontal = true;
editor.grabVertical = true;

cursor.addSelectionListener(new SelectionAdapter() {
// when the TableEditor is over a cell, select the corresponding row in //
the table
public void widgetSelected(SelectionEvent e) {
table.setSelection(new TableItem[] { cursor.getRow()});
}
// when the user hits "ENTER" in the TableCursor, pop up a text editor so
that // they can change the text of the cell
public void widgetDefaultSelected(SelectionEvent e) {
final Text text = new Text(cursor, SWT.NONE);
TableItem row = cursor.getRow();
int column = cursor.getColumn();
text.setText(row.getText(column));
text.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
// close the text editor and copy the data over // when the user hits
"ENTER"
if (e.character == SWT.CR) {
TableItem row = cursor.getRow();
int column = cursor.getColumn();
row.setText(column, text.getText());
text.dispose();
}
// close the text editor when the user hits "ESC"
if (e.character == SWT.ESC) {
text.dispose();
}
}
});
editor.setEditor(text);
text.setFocus();
}
});
// Hide the TableCursor when the user hits the "CTRL" or "SHIFT" key.
// This alows the user to select multiple items in the table.
cursor.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (e.keyCode == SWT.CTRL
|| e.keyCode == SWT.SHIFT
|| (e.stateMask & SWT.CONTROL) != 0
|| (e.stateMask & SWT.SHIFT) != 0) {
cursor.setVisible(false);
}
}
});
// Show the TableCursor when the user releases the "SHIFT" or "CTRL" key.
// This signals the end of the multiple selection task.
table.addKeyListener(new KeyAdapter() {
public void keyReleased(KeyEvent e) {
if (e.keyCode == SWT.CONTROL && (e.stateMask & SWT.SHIFT) != 0)
return;
if (e.keyCode == SWT.SHIFT && (e.stateMask & SWT.CONTROL) != 0)
return;
if (e.keyCode != SWT.CONTROL
&& (e.stateMask & SWT.CONTROL) != 0)
return;
if (e.keyCode != SWT.SHIFT && (e.stateMask & SWT.SHIFT) != 0)
return;

TableItem[] selection = table.getSelection();
TableItem row = (selection.length == 0) ?
table.getItem(table.getTopIndex()) : selection[0];
table.showItem(row);
cursor.setSelection(row, 0);
cursor.setVisible(true);
cursor.setFocus();
}
});

Label label2 = new Label(shell, SWT.NONE);
label2.setText("Test2");

Text text2 = new Text(shell, SWT.NONE);

shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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