searchfieldaction.java

基于Eclipse RCP开发的管理工具

 /*  
  * Copyright 2006 Marcel Schoffelmeer 
  * 
  * Licensed under the Apache License, Version 2.0 (the "License"); 
  * you may not use this file except in compliance with the License. 
  * You may obtain a copy of the License at 
  * 
  *    http://www.apache.org/licenses/LICENSE-2.0 
  *    
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

package com.s10r.manager.actions;

import org.eclipse.jface.action.ControlContribution;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
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.ui.IEditorPart;
import org.eclipse.ui.plugin.AbstractUIPlugin;

import com.s10r.manager.Application;
import com.s10r.manager.EntryEditor;

public class SearchFieldAction extends ControlContribution
{
	private Text searchText;

	private boolean initialField = true;
	
	private IEditorPart activeEditorPart = null;

	private Image image;

	public SearchFieldAction(String id)
	{
		super(id);
		
		image = AbstractUIPlugin.imageDescriptorFromPlugin(
				Application.PLUGIN_ID, "icons/find.png").createImage();
	}

	@Override
	protected Control createControl(Composite parent)
	{
		Composite panel = new Composite( parent, SWT.NONE );
		GridLayout layout = new GridLayout();
		layout.numColumns = 2;
		// fill up the entire toolbar height (default is 5 which squashes the 
		// controls.
		layout.marginHeight = 0;
		panel.setLayout(layout);
				
		GridData data = new GridData(GridData.FILL, GridData.FILL, false, false);
	
		Label imgLabel = new Label(panel, SWT.NONE);	
		imgLabel.setImage(image);
		imgLabel.setLayoutData(data);

		data = new GridData(GridData.FILL, SWT.FILL, true, true);

		searchText = new Text(panel, SWT.BORDER);
		searchText.setText("enter your search term here");
		searchText.setLayoutData(data);

		// searchText does not generate selection events here, so 
		// try the focusListener instead
		searchText.addFocusListener(new FocusListener()
		{
			public void focusGained(FocusEvent e)
			{
				if (initialField)
				{
					searchText.setText("");
					initialField = false;
				}

			}

			public void focusLost(FocusEvent e)
			{
				// no-op
			}
		});
		
		searchText.addKeyListener(new KeyListener() {

			public void keyPressed(KeyEvent e)
			{
			}

			public void keyReleased(KeyEvent e)
			{
				// update the editor's filter to filter on items that match
				// the text input in this field.
				
				if (activeEditorPart != null && activeEditorPart instanceof EntryEditor)
				{
					((EntryEditor)activeEditorPart).setTableFilter(searchText.getText());
				}
			}});
		

		return panel;
	}

	public void setActiveEditorPart(IEditorPart activeEditorPart)
	{
		this.activeEditorPart = activeEditorPart;
		
	}
	
	@Override
	protected int computeWidth(Control control)
	{
		return 200;
	}
	


}