/*
  controlmodel.cpp

  This file is part of GammaRay, the Qt application inspection and
  manipulation tool.

  Copyright (C) 2012-2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Volker Krause <volker.krause@kdab.com>

  This program 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.

  This program 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 "controlmodel.h"
#include "styleoption.h"
#include "styleinspectorinterface.h"
#include <core/util.h>

#include <QPainter>
#include <QStyle>
#include <QStyleOption>

using namespace GammaRay;

struct control_element_t {
    const char *name;
    QStyle::ControlElement control;
    QStyleOption * (*styleOptionFactory)();
};

#define MAKE_CE( control ) { #control , QStyle:: control, &StyleOption::makeStyleOption }
#define MAKE_CE_X( control, factory ) { #control, QStyle:: control, &StyleOption:: factory }

static control_element_t controlElements[] =  {
  MAKE_CE_X(CE_PushButton, makeButtonStyleOption),
  MAKE_CE_X(CE_PushButtonBevel, makeButtonStyleOption),
  MAKE_CE_X(CE_PushButtonLabel, makeButtonStyleOption),
  MAKE_CE_X(CE_CheckBox, makeButtonStyleOption),
  MAKE_CE_X(CE_CheckBoxLabel, makeButtonStyleOption),
  MAKE_CE_X(CE_RadioButton, makeButtonStyleOption),
  MAKE_CE_X(CE_RadioButtonLabel, makeButtonStyleOption),
  MAKE_CE_X(CE_TabBarTab, makeTabStyleOption),
  MAKE_CE_X(CE_TabBarTabShape, makeTabStyleOption),
  MAKE_CE_X(CE_TabBarTabLabel, makeTabStyleOption),
  MAKE_CE_X(CE_ProgressBar, makeProgressBarStyleOption),
  MAKE_CE_X(CE_ProgressBarGroove, makeProgressBarStyleOption),
  MAKE_CE_X(CE_ProgressBarContents, makeProgressBarStyleOption),
  MAKE_CE_X(CE_ProgressBarLabel, makeProgressBarStyleOption),
  MAKE_CE_X(CE_MenuItem, makeMenuStyleOption),
  MAKE_CE(CE_MenuScroller),
  MAKE_CE(CE_MenuVMargin),
  MAKE_CE(CE_MenuHMargin),
  MAKE_CE(CE_MenuTearoff),
  MAKE_CE(CE_MenuEmptyArea),
  MAKE_CE_X(CE_MenuBarItem, makeMenuStyleOption),
  MAKE_CE(CE_MenuBarEmptyArea),
  MAKE_CE_X(CE_ToolButtonLabel, makeToolButtonStyleOption),
  MAKE_CE_X(CE_Header, makeHeaderStyleOption),
  MAKE_CE_X(CE_HeaderSection, makeHeaderStyleOption),
  MAKE_CE_X(CE_HeaderLabel, makeHeaderStyleOption),
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
  MAKE_CE(CE_Q3DockWindowEmptyArea),
#endif
  MAKE_CE_X(CE_ToolBoxTab, makeToolBoxStyleOption),
  MAKE_CE(CE_SizeGrip),
  MAKE_CE(CE_Splitter),
  MAKE_CE(CE_RubberBand),
  MAKE_CE(CE_DockWidgetTitle),
  MAKE_CE_X(CE_ScrollBarAddLine, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarSubLine, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarAddPage, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarSubPage, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarSlider, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarFirst, makeSliderStyleOption),
  MAKE_CE_X(CE_ScrollBarLast, makeSliderStyleOption),
  MAKE_CE(CE_FocusFrame),
  MAKE_CE_X(CE_ComboBoxLabel, makeComboBoxStyleOption),
  MAKE_CE(CE_ToolBar),
  MAKE_CE_X(CE_ToolBoxTabShape, makeToolBoxStyleOption),
  MAKE_CE_X(CE_ToolBoxTabLabel, makeToolBoxStyleOption),
  MAKE_CE_X(CE_HeaderEmptyArea, makeHeaderStyleOption),
  MAKE_CE(CE_ColumnViewGrip),
  MAKE_CE_X(CE_ItemViewItem, makeItemViewStyleOption),
  MAKE_CE_X(CE_ShapedFrame, makeFrameStyleOption)
};

ControlModel::ControlModel(QObject *parent)
  : AbstractStyleElementStateTable(parent)
{
}

QVariant ControlModel::doData(int row, int column, int role) const
{
  if (role == Qt::DecorationRole) {
    QPixmap pixmap(m_interface->cellSizeHint());
    QPainter painter(&pixmap);
    Util::drawTransparencyPattern(&painter, pixmap.rect());
    painter.scale(m_interface->cellZoom(), m_interface->cellZoom());

    QScopedPointer<QStyleOption> opt(controlElements[row].styleOptionFactory());
    fillStyleOption(opt.data(), column);
    m_style->drawControl(controlElements[row].control, opt.data(), &painter);
    return pixmap;
  }

  return AbstractStyleElementStateTable::doData(row, column, role);
}

int ControlModel::doRowCount() const
{
  return sizeof(controlElements) / sizeof(controlElements[0]);
}

QVariant ControlModel::headerData(int section, Qt::Orientation orientation, int role) const
{
  if (orientation == Qt::Vertical && role == Qt::DisplayRole) {
    return controlElements[section].name;
  }
  return AbstractStyleElementStateTable::headerData(section, orientation, role);
}
