text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the Qt Designer of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
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  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #include "qwizard_container.h"
  
  #include <QtDesigner/QExtensionManager>
  #include <QtDesigner/QDesignerFormEditorInterface>
  
  #include <QtWidgets/QWizard>
  #include <QtWidgets/QWizardPage>
  #include <QtCore/QDebug>
  
  QT_BEGIN_NAMESPACE
  
  typedef QList<int> IdList;
  typedef QList<QWizardPage *> WizardPageList;
  
  namespace qdesigner_internal {
  
  QWizardContainer::QWizardContainer(QWizard *widget, QObject *parent) :
      QObject(parent),
      m_wizard(widget)
  {
  }
  
  int QWizardContainer::count() const
  {
      return m_wizard->pageIds().size();
  }
  
  QWidget *QWizardContainer::widget(int index) const
  {
      QWidget *rc = 0;
      if (index >= 0) {
          const IdList idList = m_wizard->pageIds();
          if (index < idList.size())
              rc = m_wizard->page(idList.at(index));
      }
      return rc;
  }
  
  int QWizardContainer::currentIndex() const
  {
      const IdList idList = m_wizard->pageIds();
      const int currentId = m_wizard->currentId();
      const int rc = idList.empty() ? -1 : idList.indexOf(currentId);
      return rc;
  }
  
  void QWizardContainer::setCurrentIndex(int index)
  {
      if (index < 0 || m_wizard->pageIds().empty())
          return;
  
      int currentIdx = currentIndex();
  
      if (currentIdx == -1) {
          m_wizard->restart();
          currentIdx = currentIndex();
      }
  
      if (currentIdx == index)
          return;
  
      const int d = qAbs(index - currentIdx);
      if (index > currentIdx) {
          for (int i = 0; i < d; i++)
              m_wizard->next();
      } else {
          for (int i = 0; i < d; i++)
              m_wizard->back();
      }
  }
  
  static const char *msgWrongType = "** WARNING Attempt to add oject that is not of class WizardPage to a QWizard";
  
  void QWizardContainer::addWidget(QWidget *widget)
  {
      QWizardPage *page = qobject_cast<QWizardPage *>(widget);
      if (!page) {
          qWarning("%s", msgWrongType);
          return;
      }
      m_wizard->addPage(page);
      // Might be -1 after adding the first page
      setCurrentIndex(m_wizard->pageIds().size() - 1);
  }
  
  void QWizardContainer::insertWidget(int index, QWidget *widget)
  {
      enum { delta = 5 };
  
      QWizardPage *newPage = qobject_cast<QWizardPage *>(widget);
      if (!newPage) {
          qWarning("%s", msgWrongType);
          return;
      }
  
      const IdList idList = m_wizard->pageIds();
      const int pageCount = idList.size();
      if (index >= pageCount) {
          addWidget(widget);
          return;
      }
  
      // Insert before, reshuffle ids if required
      const int idBefore = idList.at(index);
      const int newId = idBefore - 1;
      const bool needsShuffle =
          (index == 0 && newId < 0)                        // At start: QWizard refuses to insert id -1
          || (index > 0 && idList.at(index - 1) == newId); // In-between
      if (needsShuffle) {
          // Create a gap by shuffling pages
          WizardPageList pageList;
          pageList.push_back(newPage);
          for (int i = index; i < pageCount; i++) {
              pageList.push_back(m_wizard->page(idList.at(i)));
              m_wizard->removePage(idList.at(i));
          }
          int newId = idBefore + delta;
          const WizardPageList::const_iterator wcend = pageList.constEnd();
          for (WizardPageList::const_iterator it = pageList.constBegin(); it != wcend; ++it) {
              m_wizard->setPage(newId, *it);
              newId += delta;
          }
      } else {
          // Gap found, just insert
          m_wizard->setPage(newId, newPage);
      }
      // Might be at -1 after adding the first page
      setCurrentIndex(index);
  }
  
  void QWizardContainer::remove(int index)
  {
      if (index < 0)
          return;
  
      const IdList idList = m_wizard->pageIds();
      if (index >= idList.size())
          return;
  
      m_wizard->removePage(idList.at(index));
      // goto next page, preferably
      const int newSize = idList.size() - 1;
      if (index < newSize) {
          setCurrentIndex(index);
      } else {
          if (newSize > 0)
              setCurrentIndex(newSize - 1);
      }
  }
  
  // ---------------- QWizardPagePropertySheet
  const char *QWizardPagePropertySheet::pageIdProperty = "pageId";
  
  QWizardPagePropertySheet::QWizardPagePropertySheet(QWizardPage *object, QObject *parent) :
      QDesignerPropertySheet(object, parent),
      m_pageIdIndex(createFakeProperty(QLatin1String(pageIdProperty), QString()))
  {
      setAttribute(m_pageIdIndex, true);
  }
  
  bool QWizardPagePropertySheet::reset(int index)
  {
      if (index == m_pageIdIndex) {
          setProperty(index, QString());
          return true;
      }
      return QDesignerPropertySheet::reset(index);
  }
  
  // ---------------- QWizardPropertySheet
  QWizardPropertySheet::QWizardPropertySheet(QWizard *object, QObject *parent) :
      QDesignerPropertySheet(object, parent),
      m_startId(QStringLiteral("startId"))
  {
  }
  
  bool QWizardPropertySheet::isVisible(int index) const
  {
      if (propertyName(index) == m_startId)
          return false;
      return QDesignerPropertySheet::isVisible(index);
  }
  }
  
  QT_END_NAMESPACE
  