CODEWITHSUNDEEP
javaeclipseeclipse-plugin
Anu
Anu

Reputation: 405

How to call listener for check tree selection dialog

I have one org.eclipse.ui.dialogs.CheckedTreeSelectionDialog like below code.

final CheckedTreeSelectionDialog checkedTreeSelectionDialog = new
 CheckedTreeSelectionDialog(new Shell(),new ActionLabelProvider(), new
ActionContentProvider());

ActionLabelProvider implements org.eclipse.jface.viewers.ILabelProvider and ActionContentProvider implements org.eclipse.jface.viewers.ITreeContentProvider

I have some elements initially selected and some are not in the CheckedTreeSelectionDialog.

When dialog is open, if I check the unchecked element, I want to show one message.

How can I do this?

Upvotes: 2

Views: 618

Answers (1)

Chandrayya G K
Chandrayya G K

Reputation: 8849

Create a subclass of CheckedTreeSelectionDialog and add addCheckStateListener, use the below code.

// When user checks a checkbox in the tree

import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTreeViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.CheckedTreeSelectionDialog;

public class MyCheckedTreeSelectionDialog extends CheckedTreeSelectionDialog {

    public MyCheckedTreeSelectionDialog(Shell parent, ILabelProvider labelProvider, ITreeContentProvider contentProvider) {
        super(parent, labelProvider, contentProvider);
    }

    @Override
    protected CheckboxTreeViewer getTreeViewer() {
        CheckboxTreeViewer treeViewer = super.getTreeViewer();
        treeViewer.addCheckStateListener(new ICheckStateListener() {
            public void checkStateChanged(CheckStateChangedEvent event) {

                if (event.getChecked()) {
                    // Given element is checked
                } else {
                    // Given element is un-checked
                   // Your message here
                }
            }
        });

        return treeViewer;
}

}

Upvotes: 1

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