Attachment 282722 Details for Bug 562872 – Snippet to show the problem

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Snippet to show the problem

TextCellEditorBug.java (text/plain), 4.59 KB, created by Phil Beauvoir

on 2020-05-06 05:38:00 EDT

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Description:

Filename:

MIME Type:

Creator: Phil Beauvoir

Created: 2020-05-06 05:38:00 EDT

Size: 4.59 KB

patch

obsolete

>import java.util.ArrayList;
>import java.util.List;
>
>import org.eclipse.jface.viewers.CellEditor;
>import org.eclipse.jface.viewers.ICellModifier;
>import org.eclipse.jface.viewers.ITreeContentProvider;
>import org.eclipse.jface.viewers.LabelProvider;
>import org.eclipse.jface.viewers.TextCellEditor;
>import org.eclipse.jface.viewers.TreeViewer;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.layout.GridData;
>import org.eclipse.swt.layout.GridLayout;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Shell;
>
>
>public class TextCellEditorBug {
>    
>    private TreeViewer viewer;
>
>    private class MyContentProvider implements ITreeContentProvider {
>		@Override
>		public Object[] getElements(Object inputElement) {
>			return ((MyModel)inputElement).child.toArray();
>		}
>
>		@Override
>		public Object[] getChildren(Object parentElement) {
>			return getElements(parentElement);
>		}
>
>		@Override
>		public Object getParent(Object element) {
>			if( element == null) {
>				return null;
>			}
>
>			return ((MyModel)element).parent;
>		}
>
>		@Override
>		public boolean hasChildren(Object element) {
>			return ((MyModel)element).child.size() > 0;
>		}
>
>	}
>
>	public class MyModel {
>		public MyModel parent;
>		public List<MyModel> child = new ArrayList<>();
>		public int counter;
>
>		public MyModel(int counter, MyModel parent) {
>			this.parent = parent;
>			this.counter = counter;
>		}
>
>		@Override
>		public String toString() {
>			String rv = "Item ";
>			if( parent != null ) {
>				rv = parent + ".";
>			}
>
>			rv += counter;
>
>			return rv;
>		}
>	}
>
>	public TextCellEditorBug(final Shell shell) {
>	    Button b1 = new Button(shell, SWT.PUSH);
>	    b1.setText("1. Tree is empty - Click this to populate it and then click on a node to edit it. No text cell editor!");
>	    
>        Button b2 = new Button(shell, SWT.PUSH);
>        b2.setText("2. Now click this to create a new tree pre-populated and try to edit a node - text cell editor works!");
>        b2.setEnabled(false);
>        
>        viewer = createTreeViewer(shell);
>
>        b1.addSelectionListener(new SelectionAdapter() {
>            @Override
>            public void widgetSelected(SelectionEvent e) {
>                viewer.setInput(createModel());
>                b1.setEnabled(false);
>                b2.setEnabled(true);
>            }
>        });
>        
>        b2.addSelectionListener(new SelectionAdapter() {
>            @Override
>            public void widgetSelected(SelectionEvent e) {
>                viewer.getTree().dispose();
>                viewer = createTreeViewer(shell);
>                viewer.setInput(createModel());
>                
>                shell.layout();
>                b2.setEnabled(false);
>            }
>        });
>	}
>
>	private TreeViewer createTreeViewer(Shell shell) {
>        final TreeViewer v = new TreeViewer(shell);
>        v.getTree().setLayoutData(new GridData(GridData.FILL_BOTH));
>        v.setLabelProvider(new LabelProvider());
>        v.setContentProvider(new MyContentProvider());
>        
>        // Cell Editor
>        TextCellEditor cellEditor = new TextCellEditor(v.getTree());
>        v.setColumnProperties(new String[]{ "col1" }); //$NON-NLS-1$
>        v.setCellEditors(new CellEditor[]{ cellEditor });
>        
>        v.setCellModifier(new ICellModifier() {
>            @Override
>            public void modify(Object element, String property, Object value) {
>            }
>            
>            @Override
>            public Object getValue(Object element, String property) {
>                return element == null ? null : element.toString();
>            }
>            
>            @Override
>            public boolean canModify(Object element, String property) {
>                return true;
>            }
>        });
>        
>        return v;
>	}
>	
>	private MyModel createModel() {
>		MyModel root = new MyModel(0,null);
>		root.counter = 0;
>
>		MyModel tmp;
>		for( int i = 1; i < 10; i++ ) {
>			tmp = new MyModel(i, root);
>			root.child.add(tmp);
>			for( int j = 1; j < i; j++ ) {
>				tmp.child.add(new MyModel(j,tmp));
>			}
>		}
>
>		return root;
>	}
>
>	public static void main(String[] args) {
>		Display display = new Display ();
>		Shell shell = new Shell(display);
>		shell.setLayout(new GridLayout());
>		new TextCellEditorBug(shell);
>		shell.open ();
>
>		while (!shell.isDisposed ()) {
>			if (!display.readAndDispatch ()) display.sleep ();
>		}
>
>		display.dispose ();
>	}
>}

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Attachments on bug 562872: 282722