File indexing completed on 2025-02-23 04:34:23

 /**
  * \file enumdelegate.cpp
  * Abstract base class for delegates which display enums in a combobox.
  *
  * \b Project: Kid3
  * \author Urs Fleisch
  * \date 14 Mar 2014
  *
  * Copyright (C) 2014-2024  Urs Fleisch
  *
  * This file is part of Kid3.
  *
  * Kid3 is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * Kid3 is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "enumdelegate.h"
 #include <QComboBox>
 #include <QFontMetrics>
 
 /**
  * Constructor.
  * @param parent parent object
  */
 EnumDelegate::EnumDelegate(QObject* parent) : QItemDelegate(parent)
 {
 }
 
 /**
  * Create an editor to edit the cells contents.
  * @param parent parent widget
  * @return combo box editor widget.
  */
 QWidget* EnumDelegate::createEditor(
   QWidget* parent, const QStyleOptionViewItem&, const QModelIndex&) const
 {
   auto cb = new QComboBox(parent);
   cb->addItems(getEnumStrings());
   return cb;
 }
 
 /**
  * Set data to be edited by the editor.
  * @param editor editor widget
  * @param index  index of item
  */
 void EnumDelegate::setEditorData(
   QWidget* editor, const QModelIndex& index) const
 {
   auto cb = qobject_cast<QComboBox*>(editor);
   if (int enumNr = index.data(Qt::EditRole).toInt(); cb && enumNr >= 0) {
     cb->setCurrentIndex(getIndexForEnum(enumNr));
   } else {
     QItemDelegate::setEditorData(editor, index);
   }
 }
 
 /**
  * Set model data supplied by editor.
  * @param editor editor widget
  * @param model  model
  * @param index  index of item
  */
 void EnumDelegate::setModelData(
   QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
 {
   if (auto cb = qobject_cast<QComboBox*>(editor)) {
     if (int enumNr = getEnumForIndex(cb->currentIndex()); enumNr >= 0) {
       model->setData(index, enumNr, Qt::EditRole);
       return;
     }
   }
   QItemDelegate::setModelData(editor, model, index);
 }
 
 /**
  * Get size needed by delegate.
  * @param option style
  * @param index  index of item
  * @return size needed by delegate.
  */
 QSize EnumDelegate::sizeHint(const QStyleOptionViewItem& option,
                                   const QModelIndex& index) const
 {
   QSize size(QItemDelegate::sizeHint(option, index));
   bool ok;
   int enumNr = index.data(Qt::EditRole).toInt(&ok);
   if (ok) {
     QFont fnt(qvariant_cast<QFont>(index.data(Qt::FontRole))
               .resolve(option.font));
     QFontMetrics fm(fnt);
 #if QT_VERSION >= 0x050b00
     int origWidth = fm.horizontalAdvance(QString::number(enumNr));
     int delegateWidth = fm.horizontalAdvance(getStringForEnum(enumNr));
 #else
     int origWidth = fm.width(QString::number(enumNr));
     int delegateWidth = fm.width(getStringForEnum(enumNr));
 #endif
     size.setWidth(size.width() + delegateWidth - origWidth);
   }
   return size;
 }
 
 /**
  * Render item view text.
  * @param painter painter
  * @param option style
  * @param rect the text has to be rendered within this rectangle
  * @param text to be rendered
  */
 void EnumDelegate::drawDisplay(
   QPainter* painter, const QStyleOptionViewItem& option, const QRect& rect,
   const QString& text) const
 {
   bool ok;
   int enumNr = text.toInt(&ok);
   QItemDelegate::drawDisplay(painter, option, rect,
                              ok ? getStringForEnum(enumNr) : text);
 }