X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fclient%2Ftreemodel.cpp;h=48394c5ee29c1e231f219304ba3be3b654e5198c;hp=929622d6af3eb92ec81e5b6dfcce91027c217037;hb=e561e02a8d2f1f009559d17c7b1c66cb6f4e2a5a;hpb=7df7429c009d2bea4c516e87f1ec4c956c722e09

diff --git a/src/client/treemodel.cpp b/src/client/treemodel.cpp
index 929622d6..48394c5e 100644
--- a/src/client/treemodel.cpp
+++ b/src/client/treemodel.cpp
@@ -19,207 +19,155 @@
  ***************************************************************************/
 
 #include "treemodel.h"
+#include "global.h"
 
 #include <QDebug>
+#include <QCoreApplication>
 
 /*****************************************
  *  Abstract Items of a TreeModel
  *****************************************/
 AbstractTreeItem::AbstractTreeItem(AbstractTreeItem *parent)
   : QObject(parent),
-    _flags(Qt::ItemIsSelectable | Qt::ItemIsEnabled)
+    _flags(Qt::ItemIsSelectable | Qt::ItemIsEnabled),
+    _treeItemFlags(0)
 {
 }
 
-AbstractTreeItem::~AbstractTreeItem() {
-  removeAllChilds();
-}
-
-quint64 AbstractTreeItem::id() const {
-  return (quint64)this;
-}
-
-int AbstractTreeItem::defaultColumn() const {
-  // invalid QModelIndexes aka rootNodes get their Childs stuffed into column -1
-  // all others to 0
-  if(parent() == 0)
-    return -1;
-  else
-    return 0;
+bool AbstractTreeItem::newChild(AbstractTreeItem *item) {
+  int newRow = childCount();
+  emit beginAppendChilds(newRow, newRow);
+  _childItems.append(item);
+  emit endAppendChilds();
+  return true;
 }
 
-void AbstractTreeItem::appendChild(int column, AbstractTreeItem *item) {
-  if(!_childItems.contains(column)) {
-    _childItems[column] = QList<AbstractTreeItem *>();
-    _childHash[column] = QHash<quint64, AbstractTreeItem *>();
-  }
+bool AbstractTreeItem::newChilds(const QList<AbstractTreeItem *> &items) {
+  if(items.isEmpty())
+    return false;
   
-  _childItems[column].append(item);
-  _childHash[column][item->id()] = item;
+  int nextRow = childCount();
+  int lastRow = nextRow + items.count() - 1;
 
-  connect(item, SIGNAL(destroyed()), this, SLOT(childDestroyed()));
-}
+  emit beginAppendChilds(nextRow, lastRow);
+  _childItems << items;
+  emit endAppendChilds();
 
-void AbstractTreeItem::appendChild(AbstractTreeItem *child) {
-  appendChild(defaultColumn(), child);
+  return true;
 }
 
-void AbstractTreeItem::removeChild(int column, int row) {
-  if(!_childItems.contains(column)
-     || _childItems[column].size() <= row)
-    return;
-
-  if(column == defaultColumn())
-    emit beginRemoveChilds(row, row);
-  
-  AbstractTreeItem *treeitem = _childItems[column].value(row);
-  _childItems[column].removeAt(row);
-  _childHash[column].remove(_childHash[column].key(treeitem));
-  disconnect(treeitem, 0, this, 0);
-  treeitem->deleteLater();
-
-  if(column == defaultColumn())
-    emit endRemoveChilds();
-}
+bool AbstractTreeItem::removeChild(int row) {
+  if(row < 0 || childCount() <= row)
+    return false;
 
-void AbstractTreeItem::removeChild(int row) {
-  removeChild(defaultColumn(), row);
-}
+  child(row)->removeAllChilds();
+  emit beginRemoveChilds(row, row);
+  AbstractTreeItem *treeitem = _childItems.takeAt(row);
+  delete treeitem;
+  emit endRemoveChilds();
 
-void AbstractTreeItem::removeChildById(int column, const quint64 &id) {
-  if(!_childHash[column].contains(id))
-    return;
+  checkForDeletion();
   
-  AbstractTreeItem *treeItem = _childHash[column][id];
-  int row = _childItems[column].indexOf(treeItem);
-  Q_ASSERT(row >= 0);
-  removeChild(column, row);
-}
-
-void AbstractTreeItem::removeChildById(const quint64 &id) {
-  removeChildById(defaultColumn(), id);
+  return true;
 }
 
 void AbstractTreeItem::removeAllChilds() {
-  if(childCount() == 0)
+  const int numChilds = childCount();
+  
+  if(numChilds == 0)
     return;
+  
+  AbstractTreeItem *child;
 
-  emit beginRemoveChilds(0, childCount() - 1);
+  QList<AbstractTreeItem *>::iterator childIter;
 
-  AbstractTreeItem *child;
-  foreach(int column, _childItems.keys()) {
-    QList<AbstractTreeItem *>::iterator iter = _childItems[column].begin();
-    while(iter != _childItems[column].end()) {
-      child = *iter;
-      _childHash[column].remove(_childHash[column].key(child));
-      iter = _childItems[column].erase(iter);
-      disconnect(child, 0, this, 0);
-      child->removeAllChilds();
-      child->deleteLater();
-    }
+  childIter = _childItems.begin();
+  while(childIter != _childItems.end()) {
+    child = *childIter;
+    child->setTreeItemFlags(0); // disable self deletion, as this would only fuck up consitency and the child gets deleted anyways
+    child->removeAllChilds();
+    childIter++;
+  }
+
+  emit beginRemoveChilds(0, numChilds - 1);
+  childIter = _childItems.begin();
+  while(childIter != _childItems.end()) {
+    child = *childIter;
+    childIter = _childItems.erase(childIter);
+    delete child;
   }
   emit endRemoveChilds();
-}
 
-AbstractTreeItem *AbstractTreeItem::child(int column, int row) const {
-  if(!_childItems.contains(column)
-     || _childItems[column].size() <= row)
-    return 0;
-  else
-    return _childItems[column].value(row);
+  checkForDeletion();
 }
 
-AbstractTreeItem *AbstractTreeItem::child(int row) const {
-  return child(defaultColumn(), row);
+bool AbstractTreeItem::reParent(AbstractTreeItem *newParent) {
+  // currently we support only re parenting if the child that's about to be
+  // adopted does not have any children itself.
+  if(childCount() != 0) {
+    qDebug() << "AbstractTreeItem::reParent(): cannot reparent"  << this << "with children.";
+    return false;
+  }
+
+  int oldRow = row();
+  if(oldRow == -1)
+    return false;
+  
+  emit parent()->beginRemoveChilds(oldRow, oldRow);
+  parent()->_childItems.removeAt(oldRow);
+  emit parent()->endRemoveChilds();
+
+  parent()->checkForDeletion();
+
+  setParent(newParent);
+
+  bool success = newParent->newChild(this);
+  if(!success)
+    qWarning() << "AbstractTreeItem::reParent(): failed to attach to new parent after removing from old parent! this:" << this << "new parent:" << newParent;
+
+  return success;
 }
 
-AbstractTreeItem *AbstractTreeItem::childById(int column, const quint64 &id) const {
-  if(!_childHash.contains(column)
-     || !_childHash[column].contains(id))
+AbstractTreeItem *AbstractTreeItem::child(int row) const {
+  if(childCount() <= row)
     return 0;
   else
-    return _childHash[column].value(id);
-}
-
-AbstractTreeItem *AbstractTreeItem::childById(const quint64 &id) const {
-  return childById(defaultColumn(), id);
+    return _childItems[row];
 }
 
 int AbstractTreeItem::childCount(int column) const {
-  if(!_childItems.contains(column))
+  if(column > 0)
     return 0;
   else
-    return _childItems[column].count();
-}
-
-int AbstractTreeItem::childCount() const {
-  return childCount(defaultColumn());
-}
-
-int AbstractTreeItem::column() const {
-  if(!parent())
-    return -1;
-
-  QHash<int, QList<AbstractTreeItem*> >::const_iterator iter = parent()->_childItems.constBegin();
-  while(iter != parent()->_childItems.constEnd()) {
-    if(iter.value().contains(const_cast<AbstractTreeItem *>(this)))
-      return iter.key();
-    iter++;
-  }
-
-  // unable to find us o_O
-  return parent()->defaultColumn();
+    return _childItems.count();
 }
 
 int AbstractTreeItem::row() const {
-  if(!parent())
+  if(!parent()) {
+    qWarning() << "AbstractTreeItem::row():" << this << "has no parent AbstractTreeItem as it's parent! parent is" << QObject::parent();
     return -1;
-  else
-    return parent()->_childItems[column()].indexOf(const_cast<AbstractTreeItem*>(this));
-}
-
-AbstractTreeItem *AbstractTreeItem::parent() const {
-  return qobject_cast<AbstractTreeItem *>(QObject::parent());
-}
-
-Qt::ItemFlags AbstractTreeItem::flags() const {
-  return _flags;
-}
-
-void AbstractTreeItem::setFlags(Qt::ItemFlags flags) {
-  _flags = flags;
-}
-
-void AbstractTreeItem::childDestroyed() {
-  AbstractTreeItem *item = static_cast<AbstractTreeItem*>(sender());
-
-  if(!item) {
-    qWarning() << "AbstractTreeItem::childDestroyed() received null pointer!";
-    return;
   }
-
-  QHash<int, QList<AbstractTreeItem*> >::const_iterator iter = _childItems.constBegin();
-  int column, row = -1;
-  while(iter != _childItems.constEnd()) {
-    row = iter.value().indexOf(item);
-    if(row != -1) {
-      column = iter.key();
-      break;
+  
+  int row_ = parent()->_childItems.indexOf(const_cast<AbstractTreeItem *>(this));
+  if(row_ == -1)
+    qWarning() << "AbstractTreeItem::row():" << this << "is not in the child list of" << QObject::parent();
+  return row_;
+}
+
+void AbstractTreeItem::dumpChildList() {
+  qDebug() << "==== Childlist for Item:" << this << "====";
+  if(childCount() > 0) {
+    AbstractTreeItem *child;
+    QList<AbstractTreeItem *>::const_iterator childIter = _childItems.constBegin();
+    while(childIter != _childItems.constEnd()) {
+      child = *childIter;
+      qDebug() << "Row:" << child->row() << child << child->data(0, Qt::DisplayRole);
+      childIter++;
     }
-    iter++;
-  }
-
-  if(row == -1) {
-    qWarning() << "AbstractTreeItem::childDestroyed(): unknown Child died:" << item << "parent:" << this;
-    return;
   }
-  
-  _childItems[column].removeAt(row);
-  _childHash[column].remove(_childHash[column].key(item));
-  emit beginRemoveChilds(row, row);
-  emit endRemoveChilds();
+  qDebug() << "==== End Of Childlist ====";  
 }
-  
+
 /*****************************************
  * SimpleTreeItem
  *****************************************/
@@ -233,10 +181,23 @@ SimpleTreeItem::~SimpleTreeItem() {
 }
 
 QVariant SimpleTreeItem::data(int column, int role) const {
-  if(role == Qt::DisplayRole && column < _itemData.count())
+  if(column >= columnCount() || role != Qt::DisplayRole)
+    return QVariant();
+  else
     return _itemData[column];
+}
+
+bool SimpleTreeItem::setData(int column, const QVariant &value, int role) {
+  if(column > columnCount() || role != Qt::DisplayRole)
+    return false;
+
+  if(column == columnCount())
+    _itemData.append(value);
   else
-    return QVariant();
+    _itemData[column] = value;
+
+  emit dataChanged(column);
+  return true;
 }
 
 int SimpleTreeItem::columnCount() const {
@@ -266,10 +227,24 @@ QVariant PropertyMapItem::data(int column, int role) const {
   if(column >= columnCount())
     return QVariant();
 
-  if(role != Qt::DisplayRole)
+  switch(role) {
+  case Qt::ToolTipRole:
+    return toolTip(column);
+  case Qt::DisplayRole:
+  case TreeModel::SortRole:  // fallthrough, since SortRole should default to DisplayRole
+    return property(_propertyOrder[column].toAscii());
+  default:
     return QVariant();
+  }
+  
+}
 
-  return property(_propertyOrder[column].toAscii());
+bool PropertyMapItem::setData(int column, const QVariant &value, int role) {
+  if(column >= columnCount() || role != Qt::DisplayRole)
+    return false;
+
+  emit dataChanged(column);
+  return setProperty(_propertyOrder[column].toAscii(), value);
 }
 
 int PropertyMapItem::columnCount() const {
@@ -286,9 +261,25 @@ void PropertyMapItem::appendProperty(const QString &property) {
  * TreeModel
  *****************************************/
 TreeModel::TreeModel(const QList<QVariant> &data, QObject *parent)
-  : QAbstractItemModel(parent)
+  : QAbstractItemModel(parent),
+    _childStatus(QModelIndex(), 0, 0, 0),
+    _aboutToRemoveOrInsert(false)
 {
   rootItem = new SimpleTreeItem(data, 0);
+  connectItem(rootItem);
+
+  if(Global::parser.isSet("debugmodel")) {
+    connect(this, SIGNAL(rowsAboutToBeInserted(const QModelIndex &, int, int)),
+	    this, SLOT(debug_rowsAboutToBeInserted(const QModelIndex &, int, int)));
+    connect(this, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
+	    this, SLOT(debug_rowsAboutToBeRemoved(const QModelIndex &, int, int)));
+    connect(this, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
+	    this, SLOT(debug_rowsInserted(const QModelIndex &, int, int)));
+    connect(this, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
+	    this, SLOT(debug_rowsRemoved(const QModelIndex &, int, int)));
+    connect(this, SIGNAL(dataChanged(const QModelIndex &, const QModelIndex &)),
+	    this, SLOT(debug_dataChanged(const QModelIndex &, const QModelIndex &)));
+  }
 }
 
 TreeModel::~TreeModel() {
@@ -304,9 +295,9 @@ QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) con
   if(!parent.isValid())
     parentItem = rootItem;
   else
-    parentItem = static_cast<AbstractTreeItem*>(parent.internalPointer());
+    parentItem = static_cast<AbstractTreeItem *>(parent.internalPointer());
   
-  AbstractTreeItem *childItem = parentItem->child(parent.column(), row);
+  AbstractTreeItem *childItem = parentItem->child(row);
 
   if(childItem)
     return createIndex(row, column, childItem);
@@ -314,22 +305,6 @@ QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) con
     return QModelIndex();
 }
 
-QModelIndex TreeModel::indexById(quint64 id, const QModelIndex &parent) const {
-  AbstractTreeItem *parentItem; 
-  
-  if(!parent.isValid())
-    parentItem = rootItem;
-  else
-    parentItem = static_cast<AbstractTreeItem *>(parent.internalPointer());
-  
-  AbstractTreeItem *childItem = parentItem->childById(parent.column(), id);
-  
-  if(childItem)
-    return createIndex(childItem->row(), 0, childItem);
-  else
-    return QModelIndex();
-}
-
 QModelIndex TreeModel::indexByItem(AbstractTreeItem *item) const {
   if(item == 0) {
     qWarning() << "TreeModel::indexByItem(AbstractTreeItem *item) received NULL-Pointer";
@@ -340,16 +315,18 @@ QModelIndex TreeModel::indexByItem(AbstractTreeItem *item) const {
     return QModelIndex();
   else
     return createIndex(item->row(), 0, item);
-
 }
 
 QModelIndex TreeModel::parent(const QModelIndex &index) const {
-  if(!index.isValid())
+  if(!index.isValid()) {
+    qWarning() << "TreeModel::parent(): has been asked for the rootItems Parent!";
     return QModelIndex();
+  }
   
   AbstractTreeItem *childItem = static_cast<AbstractTreeItem *>(index.internalPointer());
-  AbstractTreeItem *parentItem = static_cast<AbstractTreeItem *>(childItem->parent());
-  
+  AbstractTreeItem *parentItem = childItem->parent();
+
+  Q_ASSERT(parentItem);
   if(parentItem == rootItem)
     return QModelIndex();
   
@@ -368,39 +345,43 @@ int TreeModel::rowCount(const QModelIndex &parent) const {
 
 int TreeModel::columnCount(const QModelIndex &parent) const {
   Q_UNUSED(parent)
+  return rootItem->columnCount();
   // since there the Qt Views don't draw more columns than the header has columns
   // we can be lazy and simply return the count of header columns
   // actually this gives us more freedom cause we don't have to ensure that a rows parent
   // has equal or more columns than that row
-  
-//   if(parent.isValid()) {
-//     AbstractTreeItem *child;
-//     if(child = static_cast<AbstractTreeItem *>(parent.internalPointer())->child(parent.column(), parent.row()))
-//       return child->columnCount();
-//     else
-//       return static_cast<AbstractTreeItem*>(parent.internalPointer())->columnCount();
-//   } else {
-//     return rootItem->columnCount();
-//   }
 
-  return rootItem->columnCount();
+//   AbstractTreeItem *parentItem;
+//   if(!parent.isValid())
+//     parentItem = rootItem;
+//   else
+//     parentItem = static_cast<AbstractTreeItem*>(parent.internalPointer());
+//   return parentItem->columnCount();
 }
 
 QVariant TreeModel::data(const QModelIndex &index, int role) const {
   if(!index.isValid())
     return QVariant();
 
-  AbstractTreeItem *item = static_cast<AbstractTreeItem*>(index.internalPointer());
+  AbstractTreeItem *item = static_cast<AbstractTreeItem *>(index.internalPointer());
   return item->data(index.column(), role);
 }
 
-Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const {
-  AbstractTreeItem *item;
+bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int role) {
   if(!index.isValid())
-    item = rootItem;
-  else
-    item = static_cast<AbstractTreeItem *>(index.internalPointer());
-  return item->flags();
+    return false;
+
+  AbstractTreeItem *item = static_cast<AbstractTreeItem *>(index.internalPointer());
+  return item->setData(index.column(), value, role);
+}
+
+Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const {
+  if(!index.isValid()) {
+    return rootItem->flags() & Qt::ItemIsDropEnabled;
+  } else {
+    AbstractTreeItem *item = static_cast<AbstractTreeItem *>(index.internalPointer());
+    return item->flags();
+  }
 }
 
 QVariant TreeModel::headerData(int section, Qt::Orientation orientation, int role) const {
@@ -419,7 +400,7 @@ void TreeModel::itemDataChanged(int column) {
 
   if(column == -1) {
     leftIndex = createIndex(item->row(), 0, item);
-    rightIndex = createIndex(item->row(), item->columnCount()-1, item);
+    rightIndex = createIndex(item->row(), item->columnCount() - 1, item);
   } else {
     leftIndex = createIndex(item->row(), column, item);
     rightIndex = leftIndex;
@@ -428,85 +409,149 @@ void TreeModel::itemDataChanged(int column) {
   emit dataChanged(leftIndex, rightIndex);
 }
 
-void TreeModel::appendChild(AbstractTreeItem *parent, AbstractTreeItem *child) {
-  if(parent == 0 or child == 0) {
-    qWarning() << "TreeModel::appendChild(parent, child) parent and child have to be valid pointers!" << parent << child;
-    return;
-  }
-
-  int nextRow = parent->childCount();
-  beginInsertRows(indexByItem(parent), nextRow, nextRow);
-  parent->appendChild(child);
-  endInsertRows();
-
-  connect(child, SIGNAL(dataChanged(int)),
+void TreeModel::connectItem(AbstractTreeItem *item) {
+  connect(item, SIGNAL(dataChanged(int)),
 	  this, SLOT(itemDataChanged(int)));
   
-  connect(child, SIGNAL(newChild(AbstractTreeItem *)),
-	  this, SLOT(newChild(AbstractTreeItem *)));
-
-  connect(child, SIGNAL(beginRemoveChilds(int, int)),
-	  this, SLOT(beginRemoveChilds(int, int)));
+  connect(item, SIGNAL(beginAppendChilds(int, int)),
+	  this, SLOT(beginAppendChilds(int, int)));
+  connect(item, SIGNAL(endAppendChilds()),
+	  this, SLOT(endAppendChilds()));
   
-  connect(child, SIGNAL(endRemoveChilds()),
+  connect(item, SIGNAL(beginRemoveChilds(int, int)),
+	  this, SLOT(beginRemoveChilds(int, int)));
+  connect(item, SIGNAL(endRemoveChilds()),
 	  this, SLOT(endRemoveChilds()));
 }
 
-void TreeModel::newChild(AbstractTreeItem *child) {
-  appendChild(static_cast<AbstractTreeItem *>(sender()), child);
+void TreeModel::beginAppendChilds(int firstRow, int lastRow) {
+  AbstractTreeItem *parentItem = qobject_cast<AbstractTreeItem *>(sender());
+  if(!parentItem) {
+    qWarning() << "TreeModel::beginAppendChilds(): cannot append Childs to unknown parent";
+    return;
+  }
+
+  QModelIndex parent = indexByItem(parentItem);
+  Q_ASSERT(!_aboutToRemoveOrInsert);
+  
+  _aboutToRemoveOrInsert = true;
+  _childStatus = ChildStatus(parent, rowCount(parent), firstRow, lastRow);
+  beginInsertRows(parent, firstRow, lastRow);
+}
+
+void TreeModel::endAppendChilds() {
+  AbstractTreeItem *parentItem = qobject_cast<AbstractTreeItem *>(sender());
+  if(!parentItem) {
+    qWarning() << "TreeModel::endAppendChilds(): cannot append Childs to unknown parent";
+    return;
+  }
+  Q_ASSERT(_aboutToRemoveOrInsert);
+  ChildStatus cs = _childStatus;
+  QModelIndex parent = indexByItem(parentItem);
+  Q_ASSERT(cs.parent == parent);
+  Q_ASSERT(rowCount(parent) == cs.childCount + cs.end - cs.start + 1);
+
+  _aboutToRemoveOrInsert = false;
+  for(int i = cs.start; i <= cs.end; i++) {
+    connectItem(parentItem->child(i));
+  }
+  endInsertRows();
 }
 
 void TreeModel::beginRemoveChilds(int firstRow, int lastRow) {
-  QModelIndex parent = indexByItem(static_cast<AbstractTreeItem *>(sender()));
+  AbstractTreeItem *parentItem = qobject_cast<AbstractTreeItem *>(sender());
+  if(!parentItem) {
+    qWarning() << "TreeModel::beginRemoveChilds(): cannot append Childs to unknown parent";
+    return;
+  }
+
+  for(int i = firstRow; i <= lastRow; i++) {
+    disconnect(parentItem->child(i), 0, this, 0);
+  }
+  
+  // consitency checks
+  QModelIndex parent = indexByItem(parentItem);
+  Q_ASSERT(firstRow <= lastRow);
+  Q_ASSERT(parentItem->childCount() > lastRow);
+  Q_ASSERT(!_aboutToRemoveOrInsert);
+  _aboutToRemoveOrInsert = true;
+  _childStatus = ChildStatus(parent, rowCount(parent), firstRow, lastRow);
+
   beginRemoveRows(parent, firstRow, lastRow);
 }
 
 void TreeModel::endRemoveChilds() {
+  AbstractTreeItem *parentItem = qobject_cast<AbstractTreeItem *>(sender());
+  if(!parentItem) {
+    qWarning() << "TreeModel::endRemoveChilds(): cannot remove Childs from unknown parent";
+    return;
+  }
+
+  // concistency checks
+  Q_ASSERT(_aboutToRemoveOrInsert);
+  ChildStatus cs = _childStatus;
+  QModelIndex parent = indexByItem(parentItem);
+  Q_ASSERT(cs.parent == parent);
+  Q_ASSERT(rowCount(parent) == cs.childCount - cs.end + cs.start - 1);
+  _aboutToRemoveOrInsert = false;
+
   endRemoveRows();
 }
 
-bool TreeModel::removeRow(int row, const QModelIndex &parent) {
-  if(row > rowCount(parent))
-    return false;
-  
-  AbstractTreeItem *item;
-  if(!parent.isValid())
-    item = rootItem;
-  else
-    item = static_cast<AbstractTreeItem*>(parent.internalPointer());
-  
-  beginRemoveRows(parent, row, row);
-  item->removeChild(parent.column(), row);
-  endRemoveRows();
-  return true;
+void TreeModel::clear() {
+  rootItem->removeAllChilds();
 }
 
-bool TreeModel::removeRows(int row, int count, const QModelIndex &parent) {
-  // check if there is work to be done
-  if(count == 0)
-    return true;
+void TreeModel::debug_rowsAboutToBeInserted(const QModelIndex &parent, int start, int end) {
+  qDebug() << "debug_rowsAboutToBeInserted" << parent << parent.internalPointer() << parent.data().toString() << rowCount(parent) << start << end;
+}
 
-  // out of range check
-  if(row + count - 1 > rowCount(parent) || row < 0 || count < 0) 
-    return false;
-  
-  AbstractTreeItem *item;
-  if(!parent.isValid())
-    item = rootItem;
-  else
-    item = static_cast<AbstractTreeItem *>(parent.internalPointer());
-  
-  
-  beginRemoveRows(parent, row, row + count - 1);
+void TreeModel::debug_rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
+  AbstractTreeItem *parentItem;
+  parentItem = static_cast<AbstractTreeItem *>(parent.internalPointer());
+  if(!parentItem)
+    parentItem = rootItem;
+  qDebug() << "debug_rowsAboutToBeRemoved" << parent << parentItem << parent.data().toString() << rowCount(parent) << start << end;
+
+  QModelIndex child;
+  AbstractTreeItem *childItem;
+  for(int i = end; i >= start; i--) {
+    child = parent.child(i, 0);
+    childItem = parentItem->child(i);
+    Q_ASSERT(childItem);
+    qDebug() << ">>>" << i << child << child.data().toString();
+  }
+}
 
-  for(int i = row + count - 1; i >= 0; i--) {
-    item->removeChild(parent.column(), i);
+void TreeModel::debug_rowsInserted(const QModelIndex &parent, int start, int end) {
+  AbstractTreeItem *parentItem;
+  parentItem = static_cast<AbstractTreeItem *>(parent.internalPointer());
+  if(!parentItem)
+    parentItem = rootItem;
+  qDebug() << "debug_rowsInserted:" << parent << parentItem << parent.data().toString() << rowCount(parent) << start << end;
+
+  QModelIndex child;
+  AbstractTreeItem *childItem;
+  for(int i = start; i <= end; i++) {
+    child = parent.child(i, 0);
+    childItem = parentItem->child(i);
+    Q_ASSERT(childItem);
+    qDebug() << "<<<" << i << child << child.data().toString();
   }
-  endRemoveRows();
-  return true;
 }
 
-void TreeModel::clear() {
-  removeRows(0, rowCount());
-  reset();
+void TreeModel::debug_rowsRemoved(const QModelIndex &parent, int start, int end) {
+  qDebug() << "debug_rowsRemoved" << parent << parent.internalPointer() << parent.data().toString() << rowCount(parent) << start << end;
+}
+
+void TreeModel::debug_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) {
+  qDebug() << "debug_dataChanged" << topLeft << bottomRight;
+  QStringList displayData;
+  for(int row = topLeft.row(); row <= bottomRight.row(); row++) {
+    displayData = QStringList();
+    for(int column = topLeft.column(); column <= bottomRight.column(); column++) {
+      displayData << data(topLeft.sibling(row, column), Qt::DisplayRole).toString();
+    }
+    qDebug() << "  row:" << row << displayData;
+  }
 }