org.eclipse.swt.widgets.Combo#getItemCount ( )源码实例Demo

private void fillExpression( Combo control )
{

	if ( designHandle instanceof DataItemHandle
			&& ( (DataItemHandle) designHandle ).getResultSetColumn( ) != null )
	{
		control.add( VALUE_OF_THIS_DATA_ITEM, 0 );
	}

	if ( control.getItemCount( ) == 0 )
	{
		control.add( DEUtil.resolveNull( null ) );
		control.select( control.getItemCount( ) - 1 );
	}

}
 

private void updateCombHistory(Combo combo) {
	if (combo == null || combo.isDisposed()) {
		return;
	}
	String value = combo.getText();
	if (value == null || value.length() == 0) {
		return;
	}

	int index = combo.indexOf(value);
	if (index == 0) {
		return;
	}
	if (index != -1) {
		combo.remove(index);
	}

	int itemCount = combo.getItemCount();
	if (itemCount == 0) {
		combo.add(value, 0);
		combo.setText(value);
		return;
	}
	combo.add(value, 0);
	combo.setText(value);
	if (itemCount > 10) {
		combo.remove(11);
	}
}
 

private void fillExpression( Combo control )
{
	if ( ( designHandle instanceof DataItemHandle )
			&& ( ( (DataItemHandle) designHandle ).getResultSetColumn( ) != null ) )
	{
		control.add( VALUE_OF_THIS_DATA_ITEM, 0 );
	}

	if ( control.getItemCount( ) == 0 )
	{
		control.add( DEUtil.resolveNull( null ) );
		control.select( control.getItemCount( ) - 1 );
	}

}
 

/**
 * If the combo is cascade then: If the value in the combo data list: then
 * select the value else: then select the first item if items exists else :
 * then set the value to combo
 * 
 * @param value
 * @param combo
 * @param listParam
 * @param isCascade
 * @param comboData
 */
private void dealWithValueNotInComboList( Object value, Combo combo,
		ScalarParameter listParam, boolean isCascade, Object comboData )
{
	if ( !isCascade
			|| ( isCascade && isContainValue( listParam.getDefaultObject( ),
					comboData ) ) )
	{
		combo.setText( value == null ? NULL_VALUE_STR : value.toString( ) );
		listParam.setSelectionValue( combo.getText( ) );
		putConfigValue( listParam.getHandle( ).getName( ), combo.getText( ) );
	}
	else
	{
		if ( combo.getItemCount( ) > 0 )
		{
			combo.select( 0 );
			listParam.setSelectionValue( combo.getText( ) );
			putConfigValue( listParam.getHandle( ).getName( ),
					combo.getData( String.valueOf( combo.getSelectionIndex( ) ) ) );
		}
		else
		{
			putConfigValue( listParam.getHandle( ).getName( ), null );
		}

	}
}
 

/**
 * If value in combo data list ,then select it and return true; else do
 * nothing and return false
 * 
 * @param selectIndex
 *            : indicate which item will be selected
 * @param value
 *            : the value which will be selected
 * @param combo
 * @param listParam
 * @return
 */

private boolean dealWithValueInComboList( int selectIndex, Object value,
		Combo combo, ScalarParameter listParam )
{
	boolean found = false;
	if ( selectIndex > 0 )
	{
		combo.select( selectIndex );
		putConfigValue( listParam.getHandle( ).getName( ),
				combo.getData( String.valueOf( combo.getSelectionIndex( ) ) ) );
		listParam.setSelectionValue( lastConfigValues.get( listParam.getHandle( ).getName( ) ) );
		found = true;
		return found;
	}
	for ( int i = 0; i < combo.getItemCount( ); i++ )
	{
		Object data = combo.getData( String.valueOf( i ) );
		if ( value == data || ( value != null && value.equals( data ) ) )
		{
			combo.select( i );
			putConfigValue( listParam.getHandle( ).getName( ),
					combo.getData( String.valueOf( combo.getSelectionIndex( ) ) ) );
			listParam.setSelectionValue( lastConfigValues.get( listParam.getHandle( ).getName( ) ) );
			found = true;
			break;
		}
	}
	return found;
}
 

/**
 * Returns the index of the item, or adds it to the combo.
 *
 * @param combo
 * @param value
 * @return
 */
private int indexOf(Combo combo, char value){
    for (int i=0; i < combo.getItems().length; i++) {
        if (combo.getItem(i).toCharArray()[1]==value) {
            return i;
        }
    }
    combo.add("("+String.valueOf(value)+")"); //$NON-NLS-1$ //$NON-NLS-2$
    return combo.getItemCount()-1;
}
 

/**
 * Setups gateway SWT controls by populating a gateway combobox and configuring an information
 * Label and the enabling checkbox.
 *
 * @param combo {@link Combo} selector to populate with discovered gateways
 * @param info {@link Label} displaying status information of the discovery
 * @param checkbox {@link Button} checkbox to enable/disable UPnP support
 */
private void populateGatewaySelectionControls(
    List<GatewayDevice> gateways, final Combo combo, final Label info, final Button checkbox) {

  combo.setEnabled(false);
  checkbox.setEnabled(false);
  combo.removeAll();

  // if no devices are found, return now - nothing to populate
  if (gateways == null || gateways.isEmpty()) {
    info.setText(Messages.UPnPUIUtils_no_gateway);
    info.getParent().pack();
    return;
  }

  this.gateways = new ArrayList<GatewayDevice>();

  // insert found gateways into combobox
  for (GatewayDevice gw : gateways) {
    try {
      String name = gw.getFriendlyName();
      if (!gw.isConnected()) name += Messages.UPnPUIUtils_disconnected;

      combo.add(name);
      this.gateways.add(gw);

    } catch (Exception e) {
      log.debug("Error updating UPnP selector:" + e.getMessage()); // $NON-NLS-1$
      // ignore faulty gateway
    }
  }

  // if valid gateway found, show info and enable
  if (combo.getItemCount() > 0) {
    checkbox.setEnabled(true);
    combo.setEnabled(true);
    combo.select(0);
    combo.pack();
    info.setVisible(false);
  } else {
    info.setText(Messages.UPnPUIUtils_no_valid_gateway);
  }
  info.getParent().pack();
}
 

@SuppressWarnings("unchecked")
@Override
protected Control createDialogArea(Composite parent){
	lo = Extensions.getClasses(ExtensionPointConstantsData.RECHNUNGS_MANAGER, "outputter"); //$NON-NLS-1$ //$NON-NLS-2$
	if (lo.isEmpty()) {
		String msg = "Elexis has no textplugin configured for outputting bills!"; //$NON-NLS-1$ 
		SWTHelper.alert(msg, msg);
		return null;
	}
	Composite ret = new Composite(parent, SWT.NONE);
	ret.setLayout(new GridLayout());
	ret.setLayoutData(SWTHelper.getFillGridData(1, true, 1, true));
	cbLo = new Combo(ret, SWT.SINGLE | SWT.READ_ONLY);
	cbLo.setLayoutData(SWTHelper.getFillGridData(1, true, 1, false));
	bCopy = new Button(ret, SWT.CHECK);
	bCopy.setText(Messages.RnOutputDialog_markAsCopy); //$NON-NLS-1$
	bCopy.setLayoutData(SWTHelper.getFillGridData(1, true, 1, false));
	final Composite bottom = new Composite(ret, SWT.NONE);
	bottom.setLayoutData(SWTHelper.getFillGridData(1, true, 1, true));
	bottom.setLayout(stack);
	for (IRnOutputter ro : lo) {
		cbLo.add(ro.getDescription());
		ctls.add((Control) ro.createSettingsControl(bottom));
	}
	cbLo.addSelectionListener(new SelectionAdapter() {
		@Override
		public void widgetSelected(SelectionEvent e){
			int idx = cbLo.getSelectionIndex();
			if (idx != -1) {
				stack.topControl = ctls.get(idx);
				bottom.layout();
				CoreHub.localCfg.set(Preferences.RNN_DEFAULTEXPORTMODE, idx);
			}
		}
		
	});
	int lastSelected = CoreHub.localCfg.get(Preferences.RNN_DEFAULTEXPORTMODE, 0);
	if ((lastSelected < 0) || (lastSelected >= cbLo.getItemCount())) {
		lastSelected = 0;
		CoreHub.localCfg.set(Preferences.RNN_DEFAULTEXPORTMODE, 0);
	}
	cbLo.select(lastSelected);
	stack.topControl = ctls.get(cbLo.getSelectionIndex());
	bottom.layout();
	return ret;
}