//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) Ceetron Solutions AS
//
//   This library may be used under the terms of either the GNU General Public License or
//   the GNU Lesser General Public License as follows:
//
//   GNU General Public License Usage
//   This library 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 3 of the License, or
//   (at your option) any later version.
//
//   This library 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 at <<http://www.gnu.org/licenses/gpl.html>>
//   for more details.
//
//   GNU Lesser General Public License Usage
//   This library is free software; you can redistribute it and/or modify
//   it under the terms of the GNU Lesser General Public License as published by
//   the Free Software Foundation; either version 2.1 of the License, or
//   (at your option) any later version.
//
//   This library 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 Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//   for more details.
//
//##################################################################################################

#include "cafPdmUiTableViewDelegate.h"

#include "cafPdmUiFieldEditorHandle.h"
#include "cafPdmUiTableViewQModel.h"



namespace caf
{

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
PdmUiTableViewDelegate::PdmUiTableViewDelegate(QObject* parent, PdmUiTableViewQModel* model)
    :   QStyledItemDelegate(parent),
        m_model(model)
{
    m_activeEditorCount = 0;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
PdmUiTableViewDelegate::~PdmUiTableViewDelegate()
{

}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QWidget * PdmUiTableViewDelegate::createEditor(QWidget* parent, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    CAF_ASSERT(m_model);
    QWidget* editorWidget = m_model->getEditorWidgetAndTransferOwnership(parent, index);

    connect( editorWidget, SIGNAL(destroyed(QObject*)), SLOT(slotEditorDestroyed(QObject*)));
    m_activeEditorCount++;

    return editorWidget;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void PdmUiTableViewDelegate::setEditorData(QWidget* editor, const QModelIndex& index) const
{
    PdmUiFieldEditorHandle* fieldHandle = m_model->getEditor(index);
    if (fieldHandle)
    {
        fieldHandle->updateUi();
    }
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void PdmUiTableViewDelegate::updateEditorGeometry(QWidget* editor, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
    editor->setGeometry(option.rect);
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void PdmUiTableViewDelegate::slotEditorDestroyed(QObject* obj)
{
    m_activeEditorCount--;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
bool PdmUiTableViewDelegate::isEditorOpen() const
{
    return m_activeEditorCount > 0;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
void PdmUiTableViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QStyleOptionViewItemV4 viewItemOption(option);

    QVariant fgText = index.data(Qt::ForegroundRole);

    if (fgText.canConvert<QColor>()){
        viewItemOption.palette.setColor(QPalette::Active, QPalette::HighlightedText, qvariant_cast<QColor>(fgText));
        viewItemOption.palette.setColor(QPalette::Inactive, QPalette::HighlightedText, qvariant_cast<QColor>(fgText));
    }
  
    this->QStyledItemDelegate::paint(painter, viewItemOption, index);
}

} // end namespace caf