Examples of org.eclipse.jface.viewers.IBaseLabelProvider

org.eclipse.jface.viewers.IBaseLabelProvider
A label provider maps an element of the viewer's model to an optional image and optional text string used to display the element in the viewer's control. Certain label providers may allow multiple labels per element. This is an "abstract interface", defining methods common to all label providers, but does not actually define the methods to get the label(s) for an element. This interface should never be directly implemented. Most viewers will take either an ILabelProvider or an ITableLabelProvider.
A label provider must not be shared between viewers since a label provider generally manages SWT resources (images), which must be disposed when the viewer is disposed. To simplify life cycle management, the current label provider of a viewer is disposed when the viewer is disposed.

Label providers can be used outside the context of viewers wherever images are needed. When label providers are used in this fashion it is the responsibility of the user to ensure dispose is called when the provider is no longer needed.
@see ILabelProvider @see ITableLabelProvider

        }
        if (ITextViewer.class.equals(required)) {
            return getDetailViewer();
        }
        if (IDebugModelPresentation.class.equals(required)) {
            IBaseLabelProvider labelProvider = getStructuredViewer()
                    .getLabelProvider();
            if (labelProvider instanceof VariablesViewLabelProvider) {
                return ((VariablesViewLabelProvider) labelProvider)
                        .getPresentation();
            }

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                name1 = e1.toString();
                name2 = e2.toString();
            }
            else
            {
                IBaseLabelProvider prov = ((ContentViewer) viewer).getLabelProvider();
                if (prov instanceof ILabelProvider)
                {
                    ILabelProvider lprov = (ILabelProvider) prov;
                    name1 = lprov.getText(e1);
                    name2 = lprov.getText(e2);

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        if (tableViewer == null)
            return;
        IContentProvider contentProvider = tableViewer.getContentProvider();
        if (contentProvider != null)
            contentProvider.dispose();
        IBaseLabelProvider labelProvider = tableViewer.getLabelProvider();
        if (labelProvider != null)
            labelProvider.dispose();
        Control control = tableViewer.getControl();
        if (control != null)
            control.dispose();
        tableViewer = null;
    }

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    /*
     * @see IDecoratorManager#getBaseLabelProvider(String)
     */
    public IBaseLabelProvider getBaseLabelProvider(String decoratorId) {
        IBaseLabelProvider fullProvider = getLabelDecorator(decoratorId);
        if (fullProvider == null) {
      return getLightweightLabelDecorator(decoratorId);
    }
        return fullProvider;
    }

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    /**
     * @see org.eclipse.ui.IDecoratorManager#update(java.lang.String)
     */
    public void update(String decoratorId) {


        IBaseLabelProvider provider = getBaseLabelProvider(decoratorId);
        if (provider != null) {
            scheduler.clearResults();
            fireListeners(new LabelProviderChangedEvent(provider));
        }

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     * isEnabled() has been done first.
     */
    void addListener(ILabelProviderListener listener) {
        try {
            //Internal decorator might be null so be prepared
            IBaseLabelProvider currentDecorator = internalGetLabelProvider();
            if (currentDecorator != null) {
        currentDecorator.addListener(listener);
      }
        } catch (CoreException exception) {
            handleCoreException(exception);
        }
    }

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     * This method should not be called unless a check for
     * isEnabled() has been done first.
     */
    boolean isLabelProperty(Object element, String property) {
        try { //Internal decorator might be null so be prepared
            IBaseLabelProvider currentDecorator = internalGetLabelProvider();
            if (currentDecorator != null) {
        return currentDecorator.isLabelProperty(element, property);
      }
        } catch (CoreException exception) {
            handleCoreException(exception);
            return false;
        }

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     */
    protected void refreshDecorator() {
        //Only do something if disabled so as to prevent
        //gratutitous activation
        if (!this.enabled && decorator != null) {
            IBaseLabelProvider cached = decorator;
            decorator = null;
            disposeCachedDecorator(cached);
        }
    }

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   */
  protected void refreshDecorator() {
    // Only do something if disabled so as to prevent
    // gratutitous activation
    if (!this.enabled && decorator != null) {
      IBaseLabelProvider cached = decorator;
      decorator = null;
      disposeCachedDecorator(cached);
    }
  }

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    private int compareColumn(final Viewer viewer, final Object a, final Object b,
        final int columnNumber) {
      if (columnNumber == BindingLabelProvider.COLUMN_USER) {
        return sortUser(viewer, a, b);
      }
      IBaseLabelProvider baseLabel = ((TreeViewer)viewer).getLabelProvider();
      if (baseLabel instanceof ITableLabelProvider) {
        ITableLabelProvider tableProvider = (ITableLabelProvider) baseLabel;
        String e1p = tableProvider.getColumnText(a, columnNumber);
        String e2p = tableProvider.getColumnText(b, columnNumber);
        if (e1p != null && e2p != null) {

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