Discussion :

[*alexandre*]

Hello,

Je cherche a placé un ComboBoxCellEditor dans un table viewer mais je n'y arrive pas, un simple CellEditor est afficher au resultat.

Voici mon code de création du combo :

Code :

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        MessageCategory [] messageCategories = MessageCategory.values();
        String[] convertedCategories = new String[messageCategories.length];
        for (int i = 0; i < messageCategories.length;i++) {
            MessageCategory messageCategory = messageCategories[i];
            convertedCategories[i] = messageCategory.getName();
        }
        ComboBoxCellEditor categoryEditor = new ComboBoxCellEditor(table, convertedCategories, SWT.READ_ONLY);
        tableViewer.setCellEditors(new CellEditor[]{keyEditor, categoryEditor, null, valueEditor});

et voici le resultat obtenu (voir capture d écran)

[*alexandre*]

Finalement j ai obté pour une autre solution voici mon code

Code :

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/**
         * Creates the TableViewer which wraps the Table.
         * 
         * @param table The Table to wrap
         * @return TableViewer The newly created TableViewer
         */
	private TableViewer createTableViewer(Table table) {
	    TableViewer tableViewer = new TableViewer(table);
	    tableViewer.setUseHashlookup(true);
	    tableViewer.setColumnProperties(MessageTableConstants.COLUMN_NAMES);
 
		tableViewer.setLabelProvider(new MessageTableLabelProvider());
		tableViewer.setContentProvider(new MessageRepositoryContentProvider());	    
 
	    CellEditor keyEditor = new TextCellEditor(table);
	    CellEditor valueEditor = new TextCellEditor(table);
	    //CellEditor categoryEditor = new TextCellEditor(table);
	    ComboBoxViewerCellEditor categoryEditor = new ComboBoxViewerCellEditor(table);
		categoryEditor.setContenProvider(new IStructuredContentProvider() {
 
			/**
                         * Listen the input change
                         * @param viewer
                         *                      The viewer
                         * @param oldInput
                         *                      The old input
                         * @param newInput
                         *                      The new input
                         */
			public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 
			}
 
			/**
                         * On dispose
                         */
			public void dispose() {
 
			}
			/**
                         * Get the array of elements.
                         * 
                         * @param inputElement
                         *                      The input element
                         */
			public Object[] getElements(Object inputElement) {
				Object [] array = (Object []) inputElement;
				return array;
			}
 
		});
		categoryEditor.setLabelProvider(new LabelProvider() {
			/**
                         * Gets the text of the selected value.
                         * 
                         * @param element
                         *                      The selected element
                         */	
			public String getText(Object element) {
				MessageCategory messageCategory;
				if (element instanceof MessageCategory) {
					messageCategory = (MessageCategory) element;
					return messageCategory.getName();
				}
				return null;
			}
 
		});
		MessageCategory [] messageCategories = MessageCategory.values();
		categoryEditor.setInput(messageCategories);
	    tableViewer.setCellEditors(new CellEditor[]{keyEditor,categoryEditor, null, valueEditor});
 
	    tableViewer.setCellModifier(new MessageTableCellModifier(commandStack));
 
	    return tableViewer;
	}

une classe a ajouté

Code :

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package com.odcgroup.message.ui.table;
 
import java.text.MessageFormat;
 
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ComboBoxCellEditor;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.IBaseLabelProvider;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
 
/**
 * A cell editor that presents a list of items in a combo box. In contrast to
 * {@link ComboBoxCellEditor} it wraps the underlying {@link CCombo} using a
 * {@link ComboViewer}
 */
public class ComboBoxViewerCellEditor extends CellEditor {
 
	/**
         * The custom combo box control.
         */
	ComboViewer viewer;
 
	Object selectedValue;
 
	/**
         * Default ComboBoxCellEditor style
         */
	private static final int defaultStyle = SWT.NONE;
 
	/**
         * Creates a new cell editor with a combo viewer and a default style
         *
         * @param parent
         *            the parent control
         */
	public ComboBoxViewerCellEditor(Composite parent) {
		this(parent, defaultStyle);
	}
 
	/**
         * Creates a new cell editor with a combo viewer and the given style
         *
         * @param parent
         *            the parent control
         * @param style
         *            the style bits
         */
	public ComboBoxViewerCellEditor(Composite parent, int style) {
		super(parent, style);
		setValueValid(true);
	}
 
	/*
	 * (non-Javadoc) Method declared on CellEditor.
	 */
	protected Control createControl(Composite parent) {
 
		CCombo comboBox = new CCombo(parent, getStyle());
		comboBox.setFont(parent.getFont());
		viewer = new ComboViewer(comboBox);
 
		comboBox.addKeyListener(new KeyAdapter() {
			// hook key pressed - see PR 14201
			public void keyPressed(KeyEvent e) {
				keyReleaseOccured(e);
			}
		});
 
		comboBox.addSelectionListener(new SelectionAdapter() {
			public void widgetDefaultSelected(SelectionEvent event) {
				applyEditorValueAndDeactivate();
			}
 
			public void widgetSelected(SelectionEvent event) {
				ISelection selection = viewer.getSelection();
				if (selection.isEmpty()) {
					selectedValue = null;
				} else {
					selectedValue = ((IStructuredSelection) selection)
							.getFirstElement();
				}
			}
		});
 
		comboBox.addTraverseListener(new TraverseListener() {
			public void keyTraversed(TraverseEvent e) {
				if (e.detail == SWT.TRAVERSE_ESCAPE
						|| e.detail == SWT.TRAVERSE_RETURN) {
					e.doit = false;
				}
			}
		});
 
		comboBox.addFocusListener(new FocusAdapter() {
			public void focusLost(FocusEvent e) {
				ComboBoxViewerCellEditor.this.focusLost();
			}
		});
		return comboBox;
	}
 
	/**
         * The <code>ComboBoxCellEditor</code> implementation of this
         * <code>CellEditor</code> framework method returns the zero-based index
         * of the current selection.
         *
         * @return the zero-based index of the current selection wrapped as an
         *         <code>Integer</code>
         */
	protected Object doGetValue() {
		return selectedValue;
	}
 
	/*
	 * (non-Javadoc) Method declared on CellEditor.
	 */
	protected void doSetFocus() {
		viewer.getControl().setFocus();
	}
 
	/**
         * The <code>ComboBoxCellEditor</code> implementation of this
         * <code>CellEditor</code> framework method sets the minimum width of the
         * cell. The minimum width is 10 characters if <code>comboBox</code> is
         * not <code>null</code> or <code>disposed</code> eles it is 60 pixels
         * to make sure the arrow button and some text is visible. The list of
         * CCombo will be wide enough to show its longest item.
         */
	public LayoutData getLayoutData() {
		LayoutData layoutData = super.getLayoutData();
		if ((viewer.getControl() == null) || viewer.getControl().isDisposed()) {
			layoutData.minimumWidth = 60;
		} else {
			// make the comboBox 10 characters wide
			GC gc = new GC(viewer.getControl());
			layoutData.minimumWidth = (gc.getFontMetrics()
					.getAverageCharWidth() * 10) + 10;
			gc.dispose();
		}
		return layoutData;
	}
 
	/**
         * Set a new value
         *
         * @param value
         *            the new value
         */
	protected void doSetValue(Object value) {
		Assert.isTrue(viewer != null);
		viewer.setSelection(new StructuredSelection(value));
	}
 
	/**
         * @param labelProvider
         *            the label provider used
         * @see StructuredViewer#setLabelProvider(IBaseLabelProvider)
         */
	public void setLabelProvider(IBaseLabelProvider labelProvider) {
		viewer.setLabelProvider(labelProvider);
	}
 
	/**
         * @param provider
         *            the content provider used
         * @see StructuredViewer#setContentProvider(IContentProvider)
         */
	public void setContenProvider(IStructuredContentProvider provider) {
		viewer.setContentProvider(provider);
	}
 
	/**
         * @param input
         *            the input used
         * @see StructuredViewer#setInput(Object)
         */
	public void setInput(Object input) {
		viewer.setInput(input);
	}
 
	/**
         * @return get the viewer
         */
	public ComboViewer getViewer() {
		return viewer;
	}
 
	/**
         * Applies the currently selected value and deactiavates the cell editor
         */
	void applyEditorValueAndDeactivate() {
		// must set the selection before getting value
		ISelection selection = viewer.getSelection();
		if (selection.isEmpty()) {
			selectedValue = null;
		} else {
			selectedValue = ((IStructuredSelection) selection)
					.getFirstElement();
		}
 
		Object newValue = doGetValue();
		markDirty();
		boolean isValid = isCorrect(newValue);
		setValueValid(isValid);
 
		if (!isValid) {
			MessageFormat.format(getErrorMessage(),
					new Object[] { selectedValue });
		}
 
		fireApplyEditorValue();
		deactivate();
	}
 
	/*
	 * (non-Javadoc)
	 *
	 * @see org.eclipse.jface.viewers.CellEditor#focusLost()
	 */
	protected void focusLost() {
		if (isActivated()) {
			applyEditorValueAndDeactivate();
		}
	}
 
	/*
	 * (non-Javadoc)
	 *
	 * @see org.eclipse.jface.viewers.CellEditor#keyReleaseOccured(org.eclipse.swt.events.KeyEvent)
	 */
	protected void keyReleaseOccured(KeyEvent keyEvent) {
		if (keyEvent.character == '\u001b') { // Escape character
			fireCancelEditor();
		} else if (keyEvent.character == '\t') { // tab key
			applyEditorValueAndDeactivate();
		}
	}
}