editlabeldialog.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.dialogs;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.graphics.RGB;
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.Shell;
import org.eclipse.swt.widgets.Text;

import com.s10r.manager.model.ItemLabel;
import com.s10r.util.DuplicateChecker;


/**
 * TODO: remember what settings are used to generate passwords
 * 
 * @author schoffem
 */
public class EditLabelDialog extends TitleAreaDialog
{
    private ItemLabel label;
    private Text nameText;
    private Text descriptionText;
    private DialogType dialogType;

    private DuplicateChecker duplicateChecker;
    
	public EditLabelDialog(Shell shell, DuplicateChecker duplicateChecker,
            DialogType dialogType)
	{
		super(shell);
        
        this.duplicateChecker = duplicateChecker;
        this.dialogType = dialogType;
		
		setShellStyle(SWT.APPLICATION_MODAL | SWT.DIALOG_TRIM | SWT.RESIZE);
		setTitleAreaColor(new RGB(255, 255, 255));
	}

	@Override
	public void create()
	{
		super.create();

        this.setTitle("Label");
        
        if (dialogType == DialogType.CREATE)
        {
           this.getShell().setText("New Label");
           this.setMessage("Create a new label");
        }
        else if (dialogType == DialogType.UPDATE)
        {
            this.getShell().setText("Edit Label");
            this.setMessage("Edit a label");
        }
	}

	@Override
    protected Control createDialogArea(Composite parent)
	{
		final Composite area = new Composite(parent, SWT.NONE);
		// the parent uses a grid layout
		// so set the area layout data to fill in both
		// directions
		GridData data2 = new GridData(GridData.FILL_BOTH);
		area.setLayoutData(data2);

		final GridLayout gridLayout = new GridLayout();
		gridLayout.numColumns = 3;
		gridLayout.marginWidth = 15;
		gridLayout.marginHeight = 10;
        gridLayout.makeColumnsEqualWidth = false;
		area.setLayout(gridLayout);

        newLabel(area, "Name:");
                       
        nameText = new Text(area, SWT.BORDER);
        nameText.setLayoutData(createTextGridData());
        
        
        Label descLabel = newLabel(area, "Description:");
        descLabel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false));

        descriptionText = new Text(area, SWT.BORDER | SWT.MULTI);
        descriptionText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 3));

        // fill up the blanks on the left side of the description field
        newLabel(area, "");
        newLabel(area, "");
        

        KeyListener keyListener = new KeyListener()
        {
            public void keyPressed(KeyEvent arg0)
            {
            }

            public void keyReleased(KeyEvent arg0)
            {
                validateEntry();
            }
        };
        
        nameText.addKeyListener(keyListener);
        descriptionText.addKeyListener(keyListener);

        transferEntryToFields();        
        
        
		return area;
	}
    
    private void transferEntryToFields()
    {
        setTextField(nameText, label.getName());        
        setTextField(descriptionText, label.getDescription());        
    }

    private void transferFieldsToEntry()
    {
        label.setName(nameText.getText());
        label.setDescription(descriptionText.getText());
    }

    private void setTextField(Text text, String s)
    {
        if (s != null)
        {
            text.setText(s);
        }       
    }

    private Label newLabel(Composite parent, String text)
    {
        Label label = new Label(parent, SWT.NONE);
        label.setText(text);
        label.setLayoutData(new GridData(SWT.LEFT, SWT.LEFT, false, false));
        return label;
    }
    
    private GridData createTextGridData()
    {
        return createTextGridData(2, 1);
    }
    
    private GridData createTextGridData(int horizontalSpan, int verticalSpan)
    {
       return new GridData(SWT.FILL, SWT.FILL, true, false, horizontalSpan, verticalSpan);
    }


	@Override
	protected Control createButtonBar(Composite arg0)
	{
		Control c = super.createButtonBar(arg0);

		enableOK(false);

		return c;
	}
        

	@Override
	protected void okPressed()
	{
        transferFieldsToEntry();
        
		super.okPressed();
	}

    public void setEntry(ItemLabel entry)
    {
        this.label = entry;        
    }
    
    private void validateEntry()
    {
        enableOK(false);
        
        if (nameText.getText().length() == 0)
        {
            setErrorMessage("The name may not be empty."); 
        }
        else if (duplicateChecker != null && duplicateChecker.exists(nameText.getText()))
        {
            setErrorMessage("Label named " + nameText.getText() + " already exists");             
        }
        else
        {
            setErrorMessage(null);
            enableOK(true);
        }
    }

    private void enableOK(boolean enable)
    {
        getButton(IDialogConstants.OK_ID).setEnabled(enable);      
    }

    public ItemLabel getEntry()
    {
        return label;
    }


}