/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.ui.wizards;

import net.sourceforge.phpdt.core.IJavaElement;
import net.sourceforge.phpdt.internal.ui.wizards.NewWizardMessages;
import net.sourceforge.phpdt.internal.ui.wizards.dialogfields.DialogField;
import net.sourceforge.phpdt.internal.ui.wizards.dialogfields.LayoutUtil;
import net.sourceforge.phpdt.internal.ui.wizards.dialogfields.SelectionButtonDialogFieldGroup;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * Wizard page to  create a new class. 
 * <p>
 * Note: This class is not intended to be subclassed. To implement a different kind of 
 * a new class wizard page, extend <code>NewTypeWizardPage</code>.
 * </p>
 * 
 * @since 2.0
 */
public class NewClassWizardPage extends NewTypeWizardPage {

  private final static String PAGE_NAME = "NewClassWizardPage"; //$NON-NLS-1$

  private final static String SETTINGS_CREATEMAIN = "create_main"; //$NON-NLS-1$
  private final static String SETTINGS_CREATECONSTR = "create_constructor"; //$NON-NLS-1$
  private final static String SETTINGS_CREATEUNIMPLEMENTED = "create_unimplemented"; //$NON-NLS-1$

  private SelectionButtonDialogFieldGroup fMethodStubsButtons;

  /**
   * Creates a new <code>NewClassWizardPage</code>
   */
  public NewClassWizardPage() {
    super(true, PAGE_NAME);

    setTitle(NewWizardMessages.getString("NewClassWizardPage.title")); //$NON-NLS-1$
    setDescription(NewWizardMessages.getString("NewClassWizardPage.description")); //$NON-NLS-1$

    String[] buttonNames3 = new String[] { NewWizardMessages.getString("NewClassWizardPage.methods.main"), NewWizardMessages.getString("NewClassWizardPage.methods.constructors"), //$NON-NLS-1$ //$NON-NLS-2$
      NewWizardMessages.getString("NewClassWizardPage.methods.inherited") //$NON-NLS-1$
    };
    fMethodStubsButtons = new SelectionButtonDialogFieldGroup(SWT.CHECK, buttonNames3, 1);
    fMethodStubsButtons.setLabelText(NewWizardMessages.getString("NewClassWizardPage.methods.label")); //$NON-NLS-1$
  }

  // -------- Initialization ---------

  /**
   * The wizard owning this page is responsible for calling this method with the
   * current selection. The selection is used to initialize the fields of the wizard 
   * page.
   * 
   * @param selection used to initialize the fields
   */
  public void init(IStructuredSelection selection) {
    IJavaElement jelem = getInitialJavaElement(selection);
    initContainerPage(jelem);
    initTypePage(jelem);
    doStatusUpdate();

    boolean createMain = false;
    boolean createConstructors = false;
    boolean createUnimplemented = true;
    IDialogSettings section = getDialogSettings().getSection(PAGE_NAME);
    if (section != null) {
      createMain = section.getBoolean(SETTINGS_CREATEMAIN);
      createConstructors = section.getBoolean(SETTINGS_CREATECONSTR);
      createUnimplemented = section.getBoolean(SETTINGS_CREATEUNIMPLEMENTED);
    }

    setMethodStubSelection(createMain, createConstructors, createUnimplemented, true);
  }

  // ------ validation --------
  private void doStatusUpdate() {
    // status of all used components
    IStatus[] status =
      new IStatus[] {
        fContainerStatus,
        isEnclosingTypeSelected() ? fEnclosingTypeStatus : fPackageStatus,
        fTypeNameStatus,
        fModifierStatus,
      //			fSuperClassStatus,
      //			fSuperInterfacesStatus
    };

    // the mode severe status will be displayed and the ok button enabled/disabled.
    updateStatus(status);
  }

  /*
   * @see NewContainerWizardPage#handleFieldChanged
   */
  protected void handleFieldChanged(String fieldName) {
    super.handleFieldChanged(fieldName);

    doStatusUpdate();
  }

  // ------ ui --------

  /*
   * @see WizardPage#createControl
   */
  public void createControl(Composite parent) {
    initializeDialogUnits(parent);

    Composite composite = new Composite(parent, SWT.NONE);

    int nColumns = 4;

    GridLayout layout = new GridLayout();
    layout.numColumns = nColumns;
    composite.setLayout(layout);

    // pick & choose the wanted UI components

    createContainerControls(composite, nColumns);
    createPackageControls(composite, nColumns);
    createEnclosingTypeControls(composite, nColumns);

    createSeparator(composite, nColumns);

    createTypeNameControls(composite, nColumns);
    createModifierControls(composite, nColumns);

    createSuperClassControls(composite, nColumns);
    createSuperInterfacesControls(composite, nColumns);

    createMethodStubSelectionControls(composite, nColumns);

    setControl(composite);

    Dialog.applyDialogFont(composite);
    //		WorkbenchHelp.setHelp(composite, IJavaHelpContextIds.NEW_CLASS_WIZARD_PAGE);	
  }

  /*
   * @see WizardPage#becomesVisible
   */
  public void setVisible(boolean visible) {
    super.setVisible(visible);
    if (visible) {
      setFocus();
    }
  }

  private void createMethodStubSelectionControls(Composite composite, int nColumns) {
    Control labelControl = fMethodStubsButtons.getLabelControl(composite);
    LayoutUtil.setHorizontalSpan(labelControl, nColumns);

    DialogField.createEmptySpace(composite);

    Control buttonGroup = fMethodStubsButtons.getSelectionButtonsGroup(composite);
    LayoutUtil.setHorizontalSpan(buttonGroup, nColumns - 1);
  }

  /**
   * Returns the current selection state of the 'Create Main' checkbox.
   * 
   * @return the selection state of the 'Create Main' checkbox
   */
  public boolean isCreateMain() {
    return fMethodStubsButtons.isSelected(0);
  }

  /**
   * Returns the current selection state of the 'Create Constructors' checkbox.
   * 
   * @return the selection state of the 'Create Constructors' checkbox
   */
  public boolean isCreateConstructors() {
    return fMethodStubsButtons.isSelected(1);
  }

  /**
   * Returns the current selection state of the 'Create inherited abstract methods' 
   * checkbox.
   * 
   * @return the selection state of the 'Create inherited abstract methods' checkbox
   */
  public boolean isCreateInherited() {
    return fMethodStubsButtons.isSelected(2);
  }

  /**
   * Sets the selection state of the method stub checkboxes.
   * 
   * @param createMain initial selection state of the 'Create Main' checkbox.
   * @param createConstructors initial selection state of the 'Create Constructors' checkbox.
   * @param createInherited initial selection state of the 'Create inherited abstract methods' checkbox.
   * @param canBeModified if <code>true</code> the method stub checkboxes can be changed by 
   * the user. If <code>false</code> the buttons are "read-only"
   */
  public void setMethodStubSelection(
    boolean createMain,
    boolean createConstructors,
    boolean createInherited,
    boolean canBeModified) {
    fMethodStubsButtons.setSelection(0, createMain);
    fMethodStubsButtons.setSelection(1, createConstructors);
    fMethodStubsButtons.setSelection(2, createInherited);

    fMethodStubsButtons.setEnabled(canBeModified);
  }

  // ---- creation ----------------

  /*
   * @see NewTypeWizardPage#createTypeMembers
   */
  //	protected void createTypeMembers(IType type, ImportsManager imports, IProgressMonitor monitor) throws CoreException {
  //		boolean doMain= isCreateMain();
  //		boolean doConstr= isCreateConstructors();
  //		boolean doInherited= isCreateInherited();
  //		createInheritedMethods(type, doConstr, doInherited, imports, new SubProgressMonitor(monitor, 1));
  //
  //		if (doMain) {
  //			StringBuffer buf= new StringBuffer();
  //			buf.append("public static void main("); //$NON-NLS-1$
  //			buf.append(imports.addImport("java.lang.String")); //$NON-NLS-1$
  //			buf.append("[] args) {}"); //$NON-NLS-1$
  //			type.createMethod(buf.toString(), null, false, null);
  //		}
  //		
  //		IDialogSettings section= getDialogSettings().getSection(PAGE_NAME);
  //		if (section == null) {
  //			section= getDialogSettings().addNewSection(PAGE_NAME);
  //		}
  //		section.put(SETTINGS_CREATEMAIN, doMain);
  //		section.put(SETTINGS_CREATECONSTR, doConstr);
  //		section.put(SETTINGS_CREATEUNIMPLEMENTED, doInherited);
  //		
  //		if (monitor != null) {
  //			monitor.done();
  //		}	
  //	}

}