content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.preferences;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.eclipse.jface.dialogs.StatusDialog;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.JavaScriptCore;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.dialogs.StatusInfo;
  import org.eclipse.wst.jsdt.internal.ui.preferences.TodoTaskConfigurationBlock.TodoTask;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.ComboDialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.DialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.IDialogFieldListener;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.LayoutUtil;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.StringDialogField;
  
  /**
   * Dialog to enter a na new task tag
   */
  public class TodoTaskInputDialog extends StatusDialog {
  	
  	private class CompilerTodoTaskInputAdapter implements IDialogFieldListener {
  		public void dialogFieldChanged(DialogField field) {
  			doValidation();
  		}			
  	}
  	
  	private StringDialogField fNameDialogField;
  	private ComboDialogField fPriorityDialogField;
  	
  	private List fExistingNames;
  		
  	public TodoTaskInputDialog(Shell parent, TodoTask task, List existingEntries) {
  		super(parent);
  		
  		fExistingNames= new ArrayList(existingEntries.size());
  		for (int i= 0; i < existingEntries.size(); i++) {
  			TodoTask curr= (TodoTask) existingEntries.get(i);
  			if (!curr.equals(task)) {
  				fExistingNames.add(curr.name);
  			}
  		}
  		
  		if (task == null) {
  			setTitle(PreferencesMessages.TodoTaskInputDialog_new_title); 
  		} else {
  			setTitle(PreferencesMessages.TodoTaskInputDialog_edit_title); 
  		}
  
  		CompilerTodoTaskInputAdapter adapter= new CompilerTodoTaskInputAdapter();
  
  		fNameDialogField= new StringDialogField();
  		fNameDialogField.setLabelText(PreferencesMessages.TodoTaskInputDialog_name_label); 
  		fNameDialogField.setDialogFieldListener(adapter);
  		
  		fNameDialogField.setText((task != null) ? task.name : ""); //$NON-NLS-1$
  		
  		String[] items= new String[] {
  			PreferencesMessages.TodoTaskInputDialog_priority_high, 
  			PreferencesMessages.TodoTaskInputDialog_priority_normal, 
  			PreferencesMessages.TodoTaskInputDialog_priority_low
  		};
  		
  		fPriorityDialogField= new ComboDialogField(SWT.READ_ONLY);
  		fPriorityDialogField.setLabelText(PreferencesMessages.TodoTaskInputDialog_priority_label); 
  		fPriorityDialogField.setItems(items);
  		if (task != null) {
  			if (JavaScriptCore.COMPILER_TASK_PRIORITY_HIGH.equals(task.priority)) {
  				fPriorityDialogField.selectItem(0);
  			} else if (JavaScriptCore.COMPILER_TASK_PRIORITY_NORMAL.equals(task.priority)) {
  				fPriorityDialogField.selectItem(1);
  			} else {
  				fPriorityDialogField.selectItem(2);
  			}
  		} else {
  			fPriorityDialogField.selectItem(1);
  		}
  	}
  	
  	public TodoTask getResult() {
  		TodoTask task= new TodoTask();
  		task.name= fNameDialogField.getText().trim();
  		switch (fPriorityDialogField.getSelectionIndex()) {
  			case 0 :
  					task.priority= JavaScriptCore.COMPILER_TASK_PRIORITY_HIGH;
  				break;
  			case 1 :
  					task.priority= JavaScriptCore.COMPILER_TASK_PRIORITY_NORMAL;
  				break;
  			default :
  					task.priority= JavaScriptCore.COMPILER_TASK_PRIORITY_LOW;
  				break;				
  		}
  		return task;
  	}
  	
  	protected Control createDialogArea(Composite parent) {
  		Composite composite= (Composite) super.createDialogArea(parent);
  		
  		Composite inner= new Composite(composite, SWT.NONE);
  		GridLayout layout= new GridLayout();
  		layout.marginHeight= 0;
  		layout.marginWidth= 0;
  		layout.numColumns= 2;
  		inner.setLayout(layout);
  		
  		fNameDialogField.doFillIntoGrid(inner, 2);
  		fPriorityDialogField.doFillIntoGrid(inner, 2);
  		
  		LayoutUtil.setHorizontalGrabbing(fNameDialogField.getTextControl(null));
  		LayoutUtil.setWidthHint(fNameDialogField.getTextControl(null), convertWidthInCharsToPixels(45));
  		
  		fNameDialogField.postSetFocusOnDialogField(parent.getDisplay());
  		
  		applyDialogFont(composite);		
  		
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.TASK_TAG_INPUT_DIALOG);
  		
  		return composite;
  	}
  		
  	private void doValidation() {
  		StatusInfo status= new StatusInfo();
  		String newText= fNameDialogField.getText();
  		if (newText.length() == 0) {
  			status.setError(PreferencesMessages.TodoTaskInputDialog_error_enterName); 
  		} else {
  			if (newText.indexOf(',') != -1) {
  				status.setError(PreferencesMessages.TodoTaskInputDialog_error_comma); 
  			} else if (fExistingNames.contains(newText)) {
  				status.setError(PreferencesMessages.TodoTaskInputDialog_error_entryExists); 
  			} else if (Character.isWhitespace(newText.charAt(0)) ||  Character.isWhitespace(newText.charAt(newText.length() - 1))) {
  				status.setError(PreferencesMessages.TodoTaskInputDialog_error_noSpace); 
  			}
  		}
  		updateStatus(status);
  	}
  
  	/*
  	 * @see org.eclipse.jface.window.Window#configureShell(Shell)
  	 */
  	protected void configureShell(Shell newShell) {
  		super.configureShell(newShell);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(newShell, IJavaHelpContextIds.TODO_TASK_INPUT_DIALOG);
  	}
  }
  