/****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 **
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of a Qt Solutions component.
 **
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ****************************************************************************/
#pragma GCC diagnostic ignored "-Wswitch-default"
#pragma GCC diagnostic ignored "-Wfloat-equal"
#pragma GCC diagnostic ignored "-Wshadow"
#ifdef __clang__
#pragma clang diagnostic ignored "-Wunused-private-field"
#endif  // ifdef __clang__



#include <QtCore/QSet>
#include <QtGui/QIcon>
#include <QtWidgets/QHBoxLayout>
#include <QtWidgets/QHeaderView>
#include <QtGui/QPainter>
#include <QtWidgets/QApplication>
#include <QtGui/QFocusEvent>
#include <QtWidgets/QStyle>
#include <QtGui/QPalette>

#include "qttreepropertybrowser.h"

#if QT_VERSION >= 0x040400
QT_BEGIN_NAMESPACE
#endif

class QtPropertyEditorView;

// ------------ QtPropertyEditorView


QtPropertyEditorView::QtPropertyEditorView(QWidget *parent)
  : QTreeWidget(parent),
  m_editorPrivate(0)
{
  connect(header(), SIGNAL(sectionDoubleClicked(int)), this,
      SLOT(resizeColumnToContents(int)));
}

void QtPropertyEditorView::drawRow(QPainter *painter,
    const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  QStyleOptionViewItem opt = option;
  bool hasValue = true;
  if (m_editorPrivate)
  {
    QtProperty *property = m_editorPrivate->indexToProperty(index);
    if (property)
      hasValue = property->hasValue();
  }
  if (!hasValue && m_editorPrivate->markPropertiesWithoutValue())
  {
    const QColor c = option.palette.color(QPalette::Dark);
    painter->fillRect(option.rect, c);
    opt.palette.setColor(QPalette::AlternateBase, c);
  }
  else
  {
    const QColor c = m_editorPrivate->calculatedBackgroundColor(
        m_editorPrivate->indexToBrowserItem(index));
    if (c.isValid())
    {
      painter->fillRect(option.rect, c);
      opt.palette.setColor(QPalette::AlternateBase, c.lighter(112));
    }
  }
  QTreeWidget::drawRow(painter, opt, index);
  QColor color = static_cast<QRgb>(
      QApplication::style()->styleHint(QStyle::SH_Table_GridLineColor, &opt));
  painter->save();
  painter->setPen(QPen(color));
  painter->drawLine(opt.rect.x(), opt.rect.bottom(), opt.rect.right(),
      opt.rect.bottom());
  painter->restore();
}

void QtPropertyEditorView::keyPressEvent(QKeyEvent *event)
{
  switch (event->key())
  {
    case Qt::Key_Return:
    case Qt::Key_Enter:
    case Qt::Key_Space:  // Trigger Edit
      if (!m_editorPrivate->editedItem())
        if (const QTreeWidgetItem *item = currentItem())
          if (item->columnCount() >= 2 &&
              ((item->flags() &
                (Qt::ItemIsEditable | Qt::ItemIsEnabled)) ==
               (Qt::ItemIsEditable | Qt::ItemIsEnabled)))
          {
            event->accept();
            // If the current position is at column 0, move to 1.
            QModelIndex index = currentIndex();
            if (index.column() == 0)
            {
              index = index.sibling(index.row(), 1);
              setCurrentIndex(index);
            }
            edit(index);
            return;
          }
      break;
    default:
      break;
  }
  QTreeWidget::keyPressEvent(event);
}

void QtPropertyEditorView::mousePressEvent(QMouseEvent *event)
{
  QTreeWidget::mousePressEvent(event);
  QTreeWidgetItem *item = itemAt(event->pos());

  if (item)
  {
    if ((item != m_editorPrivate->editedItem()) && (event->button() ==
          Qt::LeftButton)
        && (header()->logicalIndexAt(event->pos().x()) == 1)
        && ((item->flags() & (Qt::ItemIsEditable | Qt::ItemIsEnabled)) ==
          (Qt::ItemIsEditable | Qt::ItemIsEnabled)))
    {
      editItem(item, 1);
    }
    else if (!m_editorPrivate->hasValue(item) &&
        m_editorPrivate->markPropertiesWithoutValue() && !rootIsDecorated())
    {
      if (event->pos().x() + header()->offset() < 20)
        item->setExpanded(!item->isExpanded());
    }
  }
}

// ------------ QtPropertyEditorDelegate


int QtPropertyEditorDelegate::indentation(const QModelIndex &index) const
{
  if (!m_editorPrivate)
    return 0;

  QTreeWidgetItem *item = m_editorPrivate->indexToItem(index);
  int indent = 0;
  while (item->parent())
  {
    item = item->parent();
    ++indent;
  }
  if (m_editorPrivate->treeWidget()->rootIsDecorated())
    ++indent;
  return indent * m_editorPrivate->treeWidget()->indentation();
}

void QtPropertyEditorDelegate::slotEditorDestroyed(QObject *object)
{
  if (QWidget *w = qobject_cast<QWidget *>(object))
  {
    const EditorToPropertyMap::iterator it = m_editorToProperty.find(w);
    if (it != m_editorToProperty.end())
    {
      m_propertyToEditor.remove(it.value());
      m_editorToProperty.erase(it);
    }
    if (m_editedWidget == w)
    {
      m_editedWidget = 0;
      m_editedItem = 0;
    }
  }
}

void QtPropertyEditorDelegate::closeEditor(QtProperty *property)
{
  if (QWidget *w = m_propertyToEditor.value(property, 0))
    w->deleteLater();
}

QWidget *QtPropertyEditorDelegate::createEditor(QWidget *parent,
    const QStyleOptionViewItem &, const QModelIndex &index) const
{
  if (index.column() == 1 && m_editorPrivate)
  {
    QtProperty *property = m_editorPrivate->indexToProperty(index);
    QTreeWidgetItem *item = m_editorPrivate->indexToItem(index);
    if (property && item && (item->flags() & Qt::ItemIsEnabled))
    {
      QWidget *editor = m_editorPrivate->createEditor(property, parent);
      if (editor)
      {
        editor->setAutoFillBackground(true);
        editor->installEventFilter(const_cast<QtPropertyEditorDelegate *>(
              this));
        connect(editor, SIGNAL(destroyed(QObject *)), this,
            SLOT(slotEditorDestroyed(QObject *)));
        m_propertyToEditor[property] = editor;
        m_editorToProperty[editor] = property;
        m_editedItem = item;
        m_editedWidget = editor;
      }
      return editor;
    }
  }
  return 0;
}

void QtPropertyEditorDelegate::updateEditorGeometry(QWidget *editor,
    const QStyleOptionViewItem &option, const QModelIndex &index) const
{
  Q_UNUSED(index)
    editor->setGeometry(option.rect.adjusted(0, 0, 0, -1));
}

void QtPropertyEditorDelegate::paint(QPainter *painter,
    const QStyleOptionViewItem &option,
    const QModelIndex &index) const
{
  bool hasValue = true;
  if (m_editorPrivate)
  {
    QtProperty *property = m_editorPrivate->indexToProperty(index);
    if (property)
      hasValue = property->hasValue();
  }
  QStyleOptionViewItem opt = option;
  if ((m_editorPrivate && index.column() == 0) || !hasValue)
  {
    QtProperty *property = m_editorPrivate->indexToProperty(index);
    if (property && property->isModified())
    {
      opt.font.setBold(true);
      opt.fontMetrics = QFontMetrics(opt.font);
    }
  }
  QColor c;
  if (!hasValue && m_editorPrivate->markPropertiesWithoutValue())
  {
    c = opt.palette.color(QPalette::Dark);
    opt.palette.setColor(QPalette::Text,
        opt.palette.color(QPalette::BrightText));
  }
  else
  {
    c = m_editorPrivate->calculatedBackgroundColor(
        m_editorPrivate->indexToBrowserItem(index));
    if (c.isValid() && (opt.features & QStyleOptionViewItem::Alternate))
      c = c.lighter(112);
  }
  if (c.isValid())
    painter->fillRect(option.rect, c);
  opt.state &= ~QStyle::State_HasFocus;
  if (index.column() == 1)
  {
    QTreeWidgetItem *item = m_editorPrivate->indexToItem(index);
    if (m_editedItem && m_editedItem == item)
      m_disablePainting = true;
  }
  QItemDelegate::paint(painter, opt, index);
  if (option.type)
    m_disablePainting = false;

  opt.palette.setCurrentColorGroup(QPalette::Active);
  QColor color = static_cast<QRgb>(
      QApplication::style()->styleHint(QStyle::SH_Table_GridLineColor, &opt));
  painter->save();
  painter->setPen(QPen(color));
  if (!m_editorPrivate || (!m_editorPrivate->lastColumn(
          index.column()) && hasValue))
  {
    int right = (option.direction ==
        Qt::LeftToRight) ? option.rect.right() : option.rect.left();
    painter->drawLine(right, option.rect.y(), right, option.rect.bottom());
  }
  painter->restore();
}

void QtPropertyEditorDelegate::drawDecoration(QPainter *painter,
    const QStyleOptionViewItem &option,
    const QRect &rect, const QPixmap &pixmap) const
{
  if (m_disablePainting)
    return;

  QItemDelegate::drawDecoration(painter, option, rect, pixmap);
}

void QtPropertyEditorDelegate::drawDisplay(QPainter *painter,
    const QStyleOptionViewItem &option,
    const QRect &rect, const QString &text) const
{
  if (m_disablePainting)
    return;

  QItemDelegate::drawDisplay(painter, option, rect, text);
}

QSize QtPropertyEditorDelegate::sizeHint(const QStyleOptionViewItem &option,
    const QModelIndex &index) const
{
  return QItemDelegate::sizeHint(option, index) + QSize(3, 4);
}

bool QtPropertyEditorDelegate::eventFilter(QObject *object, QEvent *event)
{
  if (event->type() == QEvent::FocusOut)
  {
    QFocusEvent *fe = static_cast<QFocusEvent *>(event);
    if (fe->reason() == Qt::ActiveWindowFocusReason)
      return false;
  }
  return QItemDelegate::eventFilter(object, event);
}

//  -------- QtTreePropertyBrowserPrivate implementation
QtTreePropertyBrowserPrivate::QtTreePropertyBrowserPrivate()
  : q_ptr(NULL),
  m_treeWidget(0),
  m_headerVisible(true),
  m_resizeMode(QtTreePropertyBrowser::Stretch),
  m_delegate(0),
  m_markPropertiesWithoutValue(false),
  m_browserChangedBlocked(false)
{
}

// Draw an icon indicating opened/closing branches
static QIcon drawIndicatorIcon(const QPalette &palette, QStyle *style)
{
  QPixmap pix(14, 14);
  pix.fill(Qt::transparent);
  QStyleOption branchOption;
  QRect r(QPoint(0, 0), pix.size());
  branchOption.rect = QRect(2, 2, 9, 9);  // ### hardcoded in qcommonstyle.cpp
  branchOption.palette = palette;
  branchOption.state = QStyle::State_Children;

  QPainter p;
  // Draw closed state
  p.begin(&pix);
  style->drawPrimitive(QStyle::PE_IndicatorBranch, &branchOption, &p);
  p.end();
  QIcon rc = pix;
  rc.addPixmap(pix, QIcon::Selected, QIcon::Off);
  // Draw opened state
  branchOption.state |= QStyle::State_Open;
  pix.fill(Qt::transparent);
  p.begin(&pix);
  style->drawPrimitive(QStyle::PE_IndicatorBranch, &branchOption, &p);
  p.end();

  rc.addPixmap(pix, QIcon::Normal, QIcon::On);
  rc.addPixmap(pix, QIcon::Selected, QIcon::On);
  return rc;
}

void QtTreePropertyBrowserPrivate::init(QWidget *parent)
{
  QHBoxLayout *layout = new QHBoxLayout(parent);
  layout->setMargin(0);
  m_treeWidget = new QtPropertyEditorView(parent);
  m_treeWidget->setEditorPrivate(this);
  m_treeWidget->setIconSize(QSize(18, 18));
  layout->addWidget(m_treeWidget);

  m_treeWidget->setColumnCount(2);
  QStringList labels;
  labels.append(QApplication::translate("QtTreePropertyBrowser", "Property",
        0));
  labels.append(QApplication::translate("QtTreePropertyBrowser", "Value", 0));
  m_treeWidget->setHeaderLabels(labels);
  m_treeWidget->setAlternatingRowColors(true);
  m_treeWidget->setEditTriggers(QAbstractItemView::EditKeyPressed);
  m_delegate = new QtPropertyEditorDelegate(parent);
  m_delegate->setEditorPrivate(this);
  m_treeWidget->setItemDelegate(m_delegate);
  m_treeWidget->header()->setSectionsMovable(false);
  m_treeWidget->header()->setSectionResizeMode(QHeaderView::Stretch);

  m_expandIcon = drawIndicatorIcon(q_ptr->palette(), q_ptr->style());

  QObject::connect(m_treeWidget, SIGNAL(collapsed(const QModelIndex &)), q_ptr,
      SLOT(slotCollapsed(const QModelIndex &)));
  QObject::connect(m_treeWidget, SIGNAL(expanded(const QModelIndex &)), q_ptr,
      SLOT(slotExpanded(const QModelIndex &)));
  QObject::connect(m_treeWidget, SIGNAL(currentItemChanged(QTreeWidgetItem*,
          QTreeWidgetItem*)), q_ptr,
      SLOT(slotCurrentTreeItemChanged(QTreeWidgetItem*, QTreeWidgetItem*)));
}

QtBrowserItem *QtTreePropertyBrowserPrivate::currentItem() const
{
  if (QTreeWidgetItem *treeItem = m_treeWidget->currentItem())
    return m_itemToIndex.value(treeItem);
  return 0;
}

void QtTreePropertyBrowserPrivate::setCurrentItem(QtBrowserItem *browserItem,
    bool block)
{
  const bool blocked = block ? m_treeWidget->blockSignals(true) : false;
  if (browserItem == 0)
    m_treeWidget->setCurrentItem(0);
  else
    m_treeWidget->setCurrentItem(m_indexToItem.value(browserItem));
  if (block)
    m_treeWidget->blockSignals(blocked);
}

QtProperty *QtTreePropertyBrowserPrivate::indexToProperty(
    const QModelIndex &index) const
{
  QTreeWidgetItem *item = m_treeWidget->indexToItem(index);
  QtBrowserItem *idx = m_itemToIndex.value(item);
  if (idx)
    return idx->property();
  return 0;
}

QtBrowserItem *QtTreePropertyBrowserPrivate::indexToBrowserItem(
    const QModelIndex &index) const
{
  QTreeWidgetItem *item = m_treeWidget->indexToItem(index);
  return m_itemToIndex.value(item);
}

QTreeWidgetItem *QtTreePropertyBrowserPrivate::indexToItem(
    const QModelIndex &index) const
{
  return m_treeWidget->indexToItem(index);
}

bool QtTreePropertyBrowserPrivate::lastColumn(int column) const
{
  return m_treeWidget->header()->visualIndex(column) ==
    m_treeWidget->columnCount() - 1;
}

void QtTreePropertyBrowserPrivate::disableItem(QTreeWidgetItem *item) const
{
  Qt::ItemFlags flags = item->flags();
  if (flags & Qt::ItemIsEnabled)
  {
    flags &= ~Qt::ItemIsEnabled;
    item->setFlags(flags);
    m_delegate->closeEditor(m_itemToIndex[item]->property());
    const int childCount = item->childCount();
    for (int i = 0; i < childCount; i++)
    {
      QTreeWidgetItem *child = item->child(i);
      disableItem(child);
    }
  }
}

void QtTreePropertyBrowserPrivate::enableItem(QTreeWidgetItem *item) const
{
  Qt::ItemFlags flags = item->flags();
  flags |= Qt::ItemIsEnabled;
  item->setFlags(flags);
  const int childCount = item->childCount();
  for (int i = 0; i < childCount; i++)
  {
    QTreeWidgetItem *child = item->child(i);
    QtProperty *property = m_itemToIndex[child]->property();
    if (property->isEnabled())
    {
      enableItem(child);
    }
  }
}

bool QtTreePropertyBrowserPrivate::hasValue(QTreeWidgetItem *item) const
{
  QtBrowserItem *browserItem = m_itemToIndex.value(item);
  if (browserItem)
    return browserItem->property()->hasValue();
  return false;
}

void QtTreePropertyBrowserPrivate::propertyInserted(QtBrowserItem *index,
    QtBrowserItem *afterIndex)
{
  QTreeWidgetItem *afterItem = m_indexToItem.value(afterIndex);
  QTreeWidgetItem *parentItem = m_indexToItem.value(index->parent());

  QTreeWidgetItem *newItem = 0;
  if (parentItem)
  {
    newItem = new QTreeWidgetItem(parentItem, afterItem);
  }
  else
  {
    newItem = new QTreeWidgetItem(m_treeWidget, afterItem);
  }
  m_itemToIndex[newItem] = index;
  m_indexToItem[index] = newItem;

  newItem->setFlags(newItem->flags() | Qt::ItemIsEditable);
  m_treeWidget->setItemExpanded(newItem, false);

  updateItem(newItem);
}

void QtTreePropertyBrowserPrivate::propertyRemoved(QtBrowserItem *index)
{
  QTreeWidgetItem *item = m_indexToItem.value(index);

  if (m_treeWidget->currentItem() == item)
  {
    m_treeWidget->setCurrentItem(0);
  }

  delete item;

  m_indexToItem.remove(index);
  m_itemToIndex.remove(item);
  m_indexToBackgroundColor.remove(index);
}

void QtTreePropertyBrowserPrivate::propertyChanged(QtBrowserItem *index)
{
  QTreeWidgetItem *item = m_indexToItem.value(index);

  updateItem(item);
}

void QtTreePropertyBrowserPrivate::updateItem(QTreeWidgetItem *item)
{
  QtProperty *property = m_itemToIndex[item]->property();
  QIcon expandIcon;
  if (property->hasValue())
  {
    QString toolTip = property->toolTip();
    if (toolTip.isEmpty())
      toolTip = property->displayText();
    item->setToolTip(1, toolTip);
    item->setIcon(1, property->valueIcon());
    property->displayText().isEmpty() ? item->setText(1,
        property->valueText()) : item->setText(1, property->displayText());
  }
  else if (markPropertiesWithoutValue() && !m_treeWidget->rootIsDecorated())
  {
    expandIcon = m_expandIcon;
  }
  else
    item->setText(1, property->toolTip());
  item->setIcon(0, expandIcon);
  // item->setFirstColumnSpanned(!property->hasValue());
  item->setToolTip(0, property->propertyName());
  item->setStatusTip(0, property->statusTip());
  item->setWhatsThis(0, property->whatsThis());
  item->setText(0, property->propertyName());
  item->setFont(0, QFont("arial", 10, QFont::Bold));
  item->setFont(1, QFont("arial", 10, QFont::Normal));
  bool wasEnabled = item->flags() & Qt::ItemIsEnabled;
  bool isEnabled = wasEnabled;
  if (property->isEnabled())
  {
    QTreeWidgetItem *parent = item->parent();
    if (!parent || (parent->flags() & Qt::ItemIsEnabled))
      isEnabled = true;
    else
      isEnabled = false;
  }
  else
  {
    isEnabled = false;
  }
  if (wasEnabled != isEnabled)
  {
    if (isEnabled)
      enableItem(item);
    else
      disableItem(item);
  }
  m_treeWidget->viewport()->update();
}

QColor QtTreePropertyBrowserPrivate::calculatedBackgroundColor(
    QtBrowserItem *item) const
{
  QtBrowserItem *i = item;
  const QMap<QtBrowserItem *,
        QColor>::const_iterator itEnd = m_indexToBackgroundColor.constEnd();
  while (i)
  {
    QMap<QtBrowserItem *,
      QColor>::const_iterator it = m_indexToBackgroundColor.constFind(i);
    if (it != itEnd)
      return it.value();
    i = i->parent();
  }
  return QColor();
}

void QtTreePropertyBrowserPrivate::slotCollapsed(const QModelIndex &index)
{
  QTreeWidgetItem *item = indexToItem(index);
  QtBrowserItem *idx = m_itemToIndex.value(item);
  if (item)
    emit q_ptr->collapsed(idx);
}

void QtTreePropertyBrowserPrivate::slotExpanded(const QModelIndex &index)
{
  QTreeWidgetItem *item = indexToItem(index);
  QtBrowserItem *idx = m_itemToIndex.value(item);
  if (item)
    emit q_ptr->expanded(idx);
}

void QtTreePropertyBrowserPrivate::slotCurrentBrowserItemChanged(
    QtBrowserItem *item)
{
  if (!m_browserChangedBlocked && item != currentItem())
    setCurrentItem(item, true);
}

void QtTreePropertyBrowserPrivate::slotCurrentTreeItemChanged(
    QTreeWidgetItem *newItem, QTreeWidgetItem *)
{
  QtBrowserItem *browserItem = newItem ? m_itemToIndex.value(newItem) : 0;
  m_browserChangedBlocked = true;
  q_ptr->setCurrentItem(browserItem);
  m_browserChangedBlocked = false;
}

QTreeWidgetItem *QtTreePropertyBrowserPrivate::editedItem() const
{
  return m_delegate->editedItem();
}

void QtTreePropertyBrowserPrivate::editItem(QtBrowserItem *browserItem)
{
  if (QTreeWidgetItem *treeItem = m_indexToItem.value(browserItem, 0))
  {
    m_treeWidget->setCurrentItem(treeItem, 1);
    m_treeWidget->editItem(treeItem, 1);
  }
}

/*!
  \class QtTreePropertyBrowser

  \brief The QtTreePropertyBrowser class provides QTreeWidget based
  property browser.

  A property browser is a widget that enables the user to edit a
  given set of properties. Each property is represented by a label
  specifying the property's name, and an editing widget (e.g. a line
  edit or a combobox) holding its value. A property can have zero or
  more subproperties.

  QtTreePropertyBrowser provides a tree based view for all nested
  properties, i.e. properties that have subproperties can be in an
  expanded (subproperties are visible) or collapsed (subproperties
  are hidden) state. For example:

  \image qttreepropertybrowser.png

  Use the QtAbstractPropertyBrowser API to add, insert and remove
  properties from an instance of the QtTreePropertyBrowser class.
  The properties themselves are created and managed by
  implementations of the QtAbstractPropertyManager class.

  \sa QtGroupBoxPropertyBrowser, QtAbstractPropertyBrowser
  */

/*!
  \fn void QtTreePropertyBrowser::collapsed(QtBrowserItem *item)

  This signal is emitted when the \a item is collapsed.

  \sa expanded(), setExpanded()
  */

/*!
  \fn void QtTreePropertyBrowser::expanded(QtBrowserItem *item)

  This signal is emitted when the \a item is expanded.

  \sa collapsed(), setExpanded()
  */

/*!
  Creates a property browser with the given \a parent.
  */
  QtTreePropertyBrowser::QtTreePropertyBrowser(QWidget *parent)
: QtAbstractPropertyBrowser(parent)
{
  d_ptr = new QtTreePropertyBrowserPrivate;
  d_ptr->q_ptr = this;

  d_ptr->init(this);
  connect(this, SIGNAL(currentItemChanged(QtBrowserItem*)), this,
      SLOT(slotCurrentBrowserItemChanged(QtBrowserItem*)));
}

/*!
  Destroys this property browser.

  Note that the properties that were inserted into this browser are
  \e not destroyed since they may still be used in other
  browsers. The properties are owned by the manager that created
  them.

  \sa QtProperty, QtAbstractPropertyManager
  */
QtTreePropertyBrowser::~QtTreePropertyBrowser()
{
  delete d_ptr;
}

/*!
  \property QtTreePropertyBrowser::indentation
  \brief indentation of the items in the tree view.
  */
int QtTreePropertyBrowser::indentation() const
{
  return d_ptr->m_treeWidget->indentation();
}

void QtTreePropertyBrowser::setIndentation(int i)
{
  d_ptr->m_treeWidget->setIndentation(i);
}

/*!
  \property QtTreePropertyBrowser::rootIsDecorated
  \brief whether to show controls for expanding and collapsing root items.
  */
bool QtTreePropertyBrowser::rootIsDecorated() const
{
  return d_ptr->m_treeWidget->rootIsDecorated();
}

void QtTreePropertyBrowser::setRootIsDecorated(bool show)
{
  d_ptr->m_treeWidget->setRootIsDecorated(show);
  QMapIterator<QTreeWidgetItem *, QtBrowserItem *> it(d_ptr->m_itemToIndex);
  while (it.hasNext())
  {
    QtProperty *property = it.next().value()->property();
    if (!property->hasValue())
      d_ptr->updateItem(it.key());
  }
}

/*!
  \property QtTreePropertyBrowser::alternatingRowColors
  \brief whether to draw the background using alternating colors.
  By default this property is set to true.
  */
bool QtTreePropertyBrowser::alternatingRowColors() const
{
  return d_ptr->m_treeWidget->alternatingRowColors();
}

void QtTreePropertyBrowser::setAlternatingRowColors(bool enable)
{
  d_ptr->m_treeWidget->setAlternatingRowColors(enable);
  QMapIterator<QTreeWidgetItem *, QtBrowserItem *> it(d_ptr->m_itemToIndex);
}

/*!
  \property QtTreePropertyBrowser::headerVisible
  \brief whether to show the header.
  */
bool QtTreePropertyBrowser::isHeaderVisible() const
{
  return d_ptr->m_headerVisible;
}

void QtTreePropertyBrowser::setHeaderVisible(bool visible)
{
  if (d_ptr->m_headerVisible == visible)
    return;

  d_ptr->m_headerVisible = visible;
  d_ptr->m_treeWidget->header()->setVisible(visible);
}

/*!
  \enum QtTreePropertyBrowser::ResizeMode

  The resize mode specifies the behavior of the header sections.

  \value Interactive The user can resize the sections.
  The sections can also be resized programmatically using setSplitterPosition().

  \value Fixed The user cannot resize the section.
  The section can only be resized programmatically using setSplitterPosition().


  \value Stretch QHeaderView will automatically resize the section to fill the available space.
  The size cannot be changed by the user or programmatically.


  \value ResizeToContents QHeaderView will automatically resize the section to its optimal
  size based on the contents of the entire column.
  The size cannot be changed by the user or programmatically.

  \sa setResizeMode()
  */

/*!
  \property QtTreePropertyBrowser::resizeMode
  \brief the resize mode of setions in the header.
  */

QtTreePropertyBrowser::ResizeMode QtTreePropertyBrowser::resizeMode() const
{
  return d_ptr->m_resizeMode;
}

void QtTreePropertyBrowser::setResizeMode(
    QtTreePropertyBrowser::ResizeMode mode)
{
  if (d_ptr->m_resizeMode == mode)
    return;

  d_ptr->m_resizeMode = mode;
  QHeaderView::ResizeMode m = QHeaderView::Stretch;
  switch (mode)
  {
    case QtTreePropertyBrowser::Interactive:
      m = QHeaderView::Interactive;
      break;
    case QtTreePropertyBrowser::Fixed:
      m = QHeaderView::Fixed;
      break;
    case QtTreePropertyBrowser::ResizeToContents:
      m = QHeaderView::ResizeToContents;
      break;
    case QtTreePropertyBrowser::Stretch:
    default:
      m = QHeaderView::Stretch;
      break;
  }
  d_ptr->m_treeWidget->header()->setSectionResizeMode(m);
}

/*!
  \property QtTreePropertyBrowser::splitterPosition
  \brief the position of the splitter between the colunms.
  */

int QtTreePropertyBrowser::splitterPosition() const
{
  return d_ptr->m_treeWidget->header()->sectionSize(0);
}

void QtTreePropertyBrowser::setSplitterPosition(int position)
{
  d_ptr->m_treeWidget->header()->resizeSection(0, position);
}

/*!
  Sets the \a item to either collapse or expanded,
  depending on the value of \a expanded.

  \sa isExpanded(), expanded(), collapsed()
  */

void QtTreePropertyBrowser::setExpanded(QtBrowserItem *item, bool expanded)
{
  QTreeWidgetItem *treeItem = d_ptr->m_indexToItem.value(item);
  if (treeItem)
    treeItem->setExpanded(expanded);
}

/*!
  Returns true if the \a item is expanded; otherwise returns false.

  \sa setExpanded()
  */

bool QtTreePropertyBrowser::isExpanded(QtBrowserItem *item) const
{
  QTreeWidgetItem *treeItem = d_ptr->m_indexToItem.value(item);
  if (treeItem)
    return treeItem->isExpanded();
  return false;
}

/*!
  Returns true if the \a item is visible; otherwise returns false.

  \sa setItemVisible()
  \since 4.5
  */

bool QtTreePropertyBrowser::isItemVisible(QtBrowserItem *item) const
{
  if (const QTreeWidgetItem *treeItem = d_ptr->m_indexToItem.value(item))
    return !treeItem->isHidden();
  return false;
}

/*!
  Sets the \a item to be visible, depending on the value of \a visible.

  \sa isItemVisible()
  \since 4.5
  */

void QtTreePropertyBrowser::setItemVisible(QtBrowserItem *item, bool visible)
{
  if (QTreeWidgetItem *treeItem = d_ptr->m_indexToItem.value(item))
    treeItem->setHidden(!visible);
}

/*!

  Sets the \a item's background color to \a color. Note that while item's background
  is rendered every second row is being drawn with alternate color (
  which is a bit lighter than items \a color)

  \sa backgroundColor(), calculatedBackgroundColor()
  */

void QtTreePropertyBrowser::setBackgroundColor(QtBrowserItem *item,
    const QColor &color)
{
  if (!d_ptr->m_indexToItem.contains(item))
    return;
  if (color.isValid())
    d_ptr->m_indexToBackgroundColor[item] = color;
  else
    d_ptr->m_indexToBackgroundColor.remove(item);
  d_ptr->m_treeWidget->viewport()->update();
}

/*!

  Returns the \a item's color. If there is no color set for item it returns invalid color.

  \sa calculatedBackgroundColor(), setBackgroundColor()
  */

QColor QtTreePropertyBrowser::backgroundColor(QtBrowserItem *item) const
{
  return d_ptr->m_indexToBackgroundColor.value(item);
}

/*!

  Returns the \a item's color. If there is no color set for item it returns parent \a item's
  color (
  if there is no color set for parent it returns grandparent's color and so on). In case

  the color is not set for \a item and it's top level item it returns invalid color.

  \sa backgroundColor(), setBackgroundColor()
  */

QColor QtTreePropertyBrowser::calculatedBackgroundColor(
    QtBrowserItem *item) const
{
  return d_ptr->calculatedBackgroundColor(item);
}

/*!
  \property QtTreePropertyBrowser::propertiesWithoutValueMarked
  \brief whether to enable or disable marking properties without value.


  When marking is enabled the item's background is rendered in dark color and item's
  foreground is rendered with light color.

  \sa propertiesWithoutValueMarked()
  */
void QtTreePropertyBrowser::setPropertiesWithoutValueMarked(bool mark)
{
  if (d_ptr->m_markPropertiesWithoutValue == mark)
    return;

  d_ptr->m_markPropertiesWithoutValue = mark;
  QMapIterator<QTreeWidgetItem *, QtBrowserItem *> it(d_ptr->m_itemToIndex);
  while (it.hasNext())

  {
    QtProperty *property = it.next().value()->property();
    if (!property->hasValue())
      d_ptr->updateItem(it.key());
  }
  d_ptr->m_treeWidget->viewport()->update();
}

bool QtTreePropertyBrowser::propertiesWithoutValueMarked() const
{
  return d_ptr->m_markPropertiesWithoutValue;
}

/*!
  \reimp
  */
void QtTreePropertyBrowser::itemInserted(QtBrowserItem *item,
    QtBrowserItem *afterItem)
{
  d_ptr->propertyInserted(item, afterItem);
}

/*!
  \reimp
  */
void QtTreePropertyBrowser::itemRemoved(QtBrowserItem *item)
{
  d_ptr->propertyRemoved(item);
}

/*!
  \reimp
  */
void QtTreePropertyBrowser::itemChanged(QtBrowserItem *item)
{
  d_ptr->propertyChanged(item);
}

/*!
  Sets the current item to \a item and opens the relevant editor for it.
  */
void QtTreePropertyBrowser::editItem(QtBrowserItem *item)
{
  d_ptr->editItem(item);
}

#if QT_VERSION >= 0x040400
QT_END_NAMESPACE
#endif

// #include "moc_qttreepropertybrowser.cxx"
// #include "qttreepropertybrowser.moc"
