content: /*******************************************************************************
   * Copyright (c) 2000, 2007 IBM Corporation and others.
   * All rights reserved. This program and the accompanying materials
   * are made available under the terms of the Eclipse Public License v1.0
   * which accompanies this distribution, and is available at
   * http://www.eclipse.org/legal/epl-v10.html
   *
   * Contributors:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields;
  
  import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.events.ModifyEvent;
  import org.eclipse.swt.events.ModifyListener;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.swt.widgets.Label;
  import org.eclipse.swt.widgets.Text;
  import org.eclipse.wst.jsdt.internal.ui.refactoring.contentassist.ControlContentAssistHelper;
  
  /**
   * Dialog field containing a label and a text control.
   */
  public class StringDialogField extends DialogField {
  		
  	private String fText;
  	private Text fTextControl;
  	private ModifyListener fModifyListener;
      private IContentAssistProcessor fContentAssistProcessor;
  	
  	public StringDialogField() {
  		super();
  		fText= ""; //$NON-NLS-1$
  	}
  			
  	public void setContentAssistProcessor(IContentAssistProcessor processor) {
  	    fContentAssistProcessor= processor;
  	    if (fContentAssistProcessor != null && isOkToUse(fTextControl)) {
  	    	ControlContentAssistHelper.createTextContentAssistant(fTextControl, fContentAssistProcessor);
  	    }
  	}
  
  	public IContentAssistProcessor getContentAssistProcessor() {
  	    return fContentAssistProcessor;
  	}
  	
  	// ------- layout helpers
  		
  	/*
  	 * @see DialogField#doFillIntoGrid
  	 */
  	public Control[] doFillIntoGrid(Composite parent, int nColumns) {
  		assertEnoughColumns(nColumns);
  		
  		Label label= getLabelControl(parent);
  		label.setLayoutData(gridDataForLabel(1));
  		Text text= getTextControl(parent);
  		text.setLayoutData(gridDataForText(nColumns - 1));
  		
  		return new Control[] { label, text };
  	} 
  
  	/*
  	 * @see DialogField#getNumberOfControls
  	 */
  	public int getNumberOfControls() {
  		return 2;	
  	}
  	
  	protected static GridData gridDataForText(int span) {
  		GridData gd= new GridData();
  		gd.horizontalAlignment= GridData.FILL;
  		gd.grabExcessHorizontalSpace= false;
  		gd.horizontalSpan= span;
  		return gd;
  	}	
  	
  	// ------- focus methods
  	
  	/*
  	 * @see DialogField#setFocus
  	 */
  	public boolean setFocus() {
  		if (isOkToUse(fTextControl)) {
  			fTextControl.setFocus();
  			fTextControl.setSelection(0, fTextControl.getText().length());
  		}
  		return true;
  	}
  		
  	// ------- ui creation			
  
  	/**
  	 * Creates or returns the created text control.
  	 * @param parent The parent composite or <code>null</code> when the widget has
  	 * already been created.
  	 */		
  	public Text getTextControl(Composite parent) {
  		if (fTextControl == null) {
  			assertCompositeNotNull(parent);
  			fModifyListener= new ModifyListener() {
  				public void modifyText(ModifyEvent e) {
  					doModifyText(e);
  				}
  			};
  			
  			fTextControl= new Text(parent, SWT.SINGLE | SWT.BORDER);
  			// moved up due to 1GEUNW2
  			fTextControl.setText(fText);
  			fTextControl.setFont(parent.getFont());
  			fTextControl.addModifyListener(fModifyListener);
  			
  			fTextControl.setEnabled(isEnabled());
  			if (fContentAssistProcessor != null) {
  			    ControlContentAssistHelper.createTextContentAssistant(fTextControl, fContentAssistProcessor);
  			}
  		}
  		return fTextControl;
  	}
  	
  	public void setTextFieldEditable(boolean editable) {
  		fTextControl.setEditable(editable);
  	}
  	
  	private void doModifyText(ModifyEvent e) {
  		if (isOkToUse(fTextControl)) {
  			fText= fTextControl.getText();
  		}
  		dialogFieldChanged();
  	}		
  	
  	// ------ enable / disable management
  	
  	/*
  	 * @see DialogField#updateEnableState
  	 */		
  	protected void updateEnableState() {
  		super.updateEnableState();		
  		if (isOkToUse(fTextControl)) {
  			fTextControl.setEnabled(isEnabled());
  		}	
  	}		
  		
  	// ------ text access 
  	
  	/**
  	 * Gets the text. Can not be <code>null</code>
  	 */	
  	public String getText() {
  		return fText;
  	}
  	
  	/**
  	 * Sets the text. Triggers a dialog-changed event.
  	 */
  	public void setText(String text) {
  		fText= text;
  		if (isOkToUse(fTextControl)) {
  			fTextControl.setText(text);
  		} else {
  			dialogFieldChanged();
  		}	
  	}
  
  	/**
  	 * Sets the text without triggering a dialog-changed event.
  	 */
  	public void setTextWithoutUpdate(String text) {
  		fText= text;
  		if (isOkToUse(fTextControl)) {
  			fTextControl.removeModifyListener(fModifyListener);
  			fTextControl.setText(text);
  			fTextControl.addModifyListener(fModifyListener);
  		}
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.DialogField#refresh()
  	 */
  	public void refresh() {
  		super.refresh();
  		if (isOkToUse(fTextControl)) {
  			setTextWithoutUpdate(fText);
  		}
  	}
  	
  }
  