| Table editor throws widget disposed error. Please help [message #461476] |
Mon, 26 September 2005 04:22 |
Eclipse User |
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Originally posted by: deepu.sandblue.com
hello all,
i have an issue which i coudnt fix even after spending a lot of time. I am
not an expert in swt/jface, so i think i miss
something.
Here is a brief of my wizard page.
public class PresentationLayerWizardPage extends ModuleBaseWizardPage{
private Table viewEditTable; // Table control
public void createControl(Composite parent) {
// create a Tab control
// create a Tab Item
tabItem.setcontrol(getTableControl());
}
public void getTableControl(){
viewEditTable = new Table(scrollableComposite,SWT.SIMPLE|SWT.H_SCROLL |
SWT.V_SCROLL);
viewEditTable.getVerticalBar().setEnabled(true);
viewEditTable.setLinesVisible(true);
viewEditTable.setHeaderVisible(true);
// set Table columns
}
public void setVisible(boolean visible) {
if(visible){
this.viewEditTable.removeAll();
initializeTableGrid();
}
super.setVisible(visible);
}
public void initializeTableGrid(){
// create TableItem
// create a table editor
// create a check box
TableItem item = new TableItem(this.viewEditTable,SWT.NONE);
TableEditor teditor = new TableEditor(viewEditTable);
teditor.grabHorizontal = true;
Button editorcheckbox = new Button(viewEditTable, SWT.CHECK | SWT.CENTER);
editorcheckbox.setLayoutData(new
GridData(GridData.HORIZONTAL_ALIGN_CENTER));
// set back color same as table grid back color
editorcheckbox.setBackground(viewEditTable.getBackground());
// set editor checkbox, on the specified cell ( row = row, column =
optionType )
teditor.setEditor(editorcheckbox,item,1);
item.setText(1,option.getView().toString()); // set underlying column
editorcheckbox.setSelection(option.getView().booleanValue()) ; // set
userfriendlycontrol
editorcheckbox.addSelectionListener(new CheckBoxListener(item,1));
}
private class CheckBoxListener implements SelectionListener{
TableItem tableItem;
int index;
public CheckBoxListener(TableItem tableItem,int index){
this.tableItem = tableItem; // selected row
this.index = index; // selected column
}
public void widgetSelected(SelectionEvent e) {
tableItem.setText(index,""+((Button)e.widget).getSelection());
}
public void widgetDefaultSelected(SelectionEvent e) {
}
}
}
} // end of wizard class
First time everything works as i could check or uncheck the check boxes and
i am able to retrieve the status from it. please
look at the selection listner which set the TableItem.setText as the status
of the checkbox on each click.
Problem comes when i click 'back' button to go the same page and try to
chnage the check box status by clicking on it. Then
i got an exception saying 'Widget EXposed'. On debug i found that it causes
in the selctionListner when we try toset the
tableItem.setText on 'widgetSelected(SelectionEvent e)' method. I coudnt
figure out why and couldnt find a soltuins yet.
can anyone please give some ideas ??
Anyhelp would be highly appreaciated. Thanks a lot in advance.
regards
dsundar
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