Java Code Examples for org.eclipse.jface.viewers.StructuredSelection#size()

/**
 * Refreshes the details field according to the current selection in the
 * items list.
 */
private void refreshDetails() {
	StructuredSelection selection = getSelectedItems();

	switch (selection.size()) {
	case 0:
		details.setInput(null);
		break;
	case 1:
		details.setInput(selection.getFirstElement());
		break;
	default:
		details
				.setInput(NLS
						.bind(
								WorkbenchMessages.FilteredItemsSelectionDialog_nItemsSelected,
								new Integer(selection.size())));
		break;
	}

}
 

@Override
protected void handleSelected(StructuredSelection selection) {
	super.handleSelected(selection);

	if (selection.size() == 0 && fTypeWizardPage.getSuperInterfaces().size() > fOldContent.size()) {
		// overrides updateStatus() from handleSelected() if
		// list of super interfaces was modified
		// the <code>super.handleSelected(selection)</code> has to be
		// called, because superclass implementation of this class updates
		// state of the table.

		updateStatus(Status.OK_STATUS);

		getButton(ADD_ID).setEnabled(false);
	} else {
		// if selection isn't empty, the add button should be enabled in
		// exactly the same scenarios as the OK button
		getButton(ADD_ID).setEnabled(getButton(OK).isEnabled());
	}
}
 

@Override
protected void handleSelected(StructuredSelection selection) {
	super.handleSelected(selection);

	if (selection.size() == 0 && getSuperTypeCount(this.typeWizardPage) > this.oldContent.size()) {
		// overrides updateStatus() from handleSelected() if
		// list of super interfaces was modified
		// the <code>super.handleSelected(selection)</code> has to be
		// called, because superclass implementation of this class updates
		// state of the table.

		updateStatus(Status.OK_STATUS);

		getButton(ADD_ID).setEnabled(false);
	} else {
		// if selection isn't empty, the add button should be enabled in
		// exactly the same scenarios as the OK button
		getButton(ADD_ID).setEnabled(getButton(OK).isEnabled());
	}
}
 

public Object getTarget( )
{
	IViewPart viewPart = UIUtil.getView( IPageLayout.ID_OUTLINE );
	if ( !( viewPart instanceof ContentOutline ) )
	{
		return null;
	}
	ContentOutline outlineView = (ContentOutline) viewPart;

	ISelection selection = outlineView.getSelection( );
	if ( selection instanceof StructuredSelection )
	{
		StructuredSelection strSelection = (StructuredSelection) selection;
		if ( strSelection.size( ) == 1 )
		{
			return strSelection.getFirstElement( );
		}
	}
	return null;
}
 

private void updateDynamicTableButtons( )
{
	StructuredSelection selection = (StructuredSelection) defaultValueViewer.getSelection( );
	boolean enable = ( selection.size( ) == 1 );
	editValueBtn.setEnabled( enable );
	delValueBtn.setEnabled( !selection.isEmpty( ) );
	delAllValuesBtn.setEnabled( defaultValueViewer.getTable( )
			.getItemCount( ) > 0 );

	Expression expression = ExpressionButtonUtil.getExpression( defaultValueChooser );
	if ( defaultValueChooser.getText( ).trim( ).length( ) == 0 )
	{
		addValueButton.setEnabled( false );
	}
	else
	{
		if ( defaultValueList != null
				&& defaultValueList.contains( expression ) )
			addValueButton.setEnabled( false );
		else
			addValueButton.setEnabled( true );
	}
}
 

@Override
public boolean isEnabled() {
	ISelection selection = selectionProvider.getSelection();
	if(selection.isEmpty() || !(selection instanceof StructuredSelection)) {
		return false;
	}
	StructuredSelection ss = (StructuredSelection) selection;
	if(ss.size() == 1 && ss.getFirstElement() instanceof IFileStore) {
		IFileStore fileStore = (IFileStore) ss.getFirstElement();
		if(!fileStore.fetchInfo().isDirectory()) {
			this.fileStore = fileStore;
			return true;
		}
		return false;
	}
	return false;
}
 

@Override
protected void updateButtonsEnableState(IStatus status) {
    Button okButton = getOkButton();
    StructuredSelection ss = getSelectedItems();
    if (ss.size() == 0 || (ss.getFirstElement() instanceof ListItem && ((ListItem)ss.getFirstElement()).isDelimiter())) {
        if (okButton != null && !okButton.isDisposed()) {
            okButton.setEnabled(false);
        }
    } else {
        super.updateButtonsEnableState(status);
    }
}
 

private void updateDynamicTableButtons( )
{
	StructuredSelection selection = (StructuredSelection) defaultValueViewer.getSelection( );
	boolean enable = ( selection.size( ) == 1 );
	editBtn.setEnabled( enable );
	delBtn.setEnabled( !selection.isEmpty( ) );
	delAllBtn.setEnabled( defaultValueViewer.getTable( ).getItemCount( ) > 0 );

	String type = (String) defaultValueChooser.getData( ExpressionButtonUtil.EXPR_TYPE );
	String value = UIUtil.convertToModelString( defaultValueChooser.getText( ),
			false );
	if ( value != null )
	{
		if ( value.equals( EMPTY_VALUE ) )
			value = ""; //$NON-NLS-1$
		else if ( value.equals( NULL_VALUE ) )
			value = null;
	}
	Expression expression = null;
	if ( value != null )
		expression = new Expression( value, type );

	if ( defaultValueChooser.getText( ).trim( ).length( ) == 0 )
	{
		addButton.setEnabled( false );
	}
	else
	{
		if ( defaultValueList != null
				&& defaultValueList.contains( expression ) )
			addButton.setEnabled( false );
		else
			addButton.setEnabled( true );
	}
	updateMessageLine( );
}
 

/**
 * @return the {@link #getViewerWidget()} current selections first element or <code>null</code>
 * @since 3.2.0
 */
public Object getViewerWidgetFirstSelection() {
	StructuredSelection  selection = (StructuredSelection) viewer.getSelection();
	if(selection==null || selection.size()==0) {
		return null;
	}
	return selection.getFirstElement();
}
 

@Override
public void menuAboutToShow(IMenuManager manager){
	ISelection currentSelection = natTableWrapper.getSelection();
	if (currentSelection instanceof StructuredSelection) {
		StructuredSelection sSelection = (StructuredSelection) currentSelection;
		if (sSelection.size() == 1) {
			ICondition selectedCondition = (ICondition) sSelection.getFirstElement();
			ConditionStatus selectionStatus = selectedCondition.getStatus();
			if (selectionStatus != ConditionStatus.ACTIVE) {
				manager
					.add(new ToggleStatusAction(selectedCondition, ConditionStatus.ACTIVE));
			}
			if (selectionStatus != ConditionStatus.RESOLVED) {
				manager.add(
					new ToggleStatusAction(selectedCondition, ConditionStatus.RESOLVED));
			}
			if (selectionStatus != ConditionStatus.RELAPSE) {
				manager.add(
					new ToggleStatusAction(selectedCondition, ConditionStatus.RELAPSE));
			}
			if (selectionStatus != ConditionStatus.REMISSION) {
				manager.add(
					new ToggleStatusAction(selectedCondition, ConditionStatus.REMISSION));
			}
		}
		if (!sSelection.isEmpty()) {
			manager.add(new RemoveConditionAction());
		}
	}
}
 

/**
 * Handle table selection. In case it's a single selection, enable/disable the 'Up' and 'Down' buttons according to
 * the selection. We only allow up and down for checked items.
 */
private void handleTableSelection()
{
	ISelection selection = tableViewer.getSelection();
	if (selection instanceof StructuredSelection)
	{
		StructuredSelection structuredSelection = (StructuredSelection) selection;
		Table table = tableViewer.getTable();
		if (structuredSelection.size() == 1 && table.getItemCount() > 1)
		{
			int selectionIndex = table.getSelectionIndex();
			TableItem item = table.getItem(selectionIndex);
			IBuildPathEntry data = (IBuildPathEntry) item.getData();
			if (item.getChecked())
			{
				upButton.setEnabled(selectionIndex != 0);
				downButton.setEnabled(selectionIndex < table.getItemCount() - 1
						&& selectionIndex < tableViewer.getCheckedElements().length - 1);
				if (!selectedEntries.contains(data))
				{
					selectedEntries.add(data);
					tableViewer.refresh();
				}
			}
			else
			{
				if (selectedEntries.contains(data))
				{
					selectedEntries.remove(data);
					tableViewer.refresh();
				}
				upButton.setEnabled(false);
				downButton.setEnabled(false);
			}
		}
		else
		{
			upButton.setEnabled(false);
			downButton.setEnabled(false);
		}
	}
}