X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fclient%2Ftreemodel.cpp;h=64cc26fe333ae79f6980593a192942aca8438423;hp=f40fa7d53d231b9f09beeeb7054246d2611fd78d;hb=46d75f41de7c1aaee605c096da28d4b0d8abf138;hpb=bf9530ddf0b227b6737e9cc672d40a703516c7ea

diff --git a/src/client/treemodel.cpp b/src/client/treemodel.cpp
index f40fa7d5..64cc26fe 100644
--- a/src/client/treemodel.cpp
+++ b/src/client/treemodel.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-08 by the Quassel Project                          *
+ *   Copyright (C) 2005-09 by the Quassel Project                          *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -20,175 +20,183 @@
 
 #include "treemodel.h"
 
+#include <QCoreApplication>
 #include <QDebug>
 
+#include "quassel.h"
+
+class RemoveChildLaterEvent : public QEvent {
+public:
+  RemoveChildLaterEvent(AbstractTreeItem *child) : QEvent(QEvent::User), _child(child) {};
+  inline AbstractTreeItem *child() { return _child; }
+private:
+  AbstractTreeItem *_child;
+};
+
+
 /*****************************************
  *  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() {
-}
-
-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;
 }
 
-bool AbstractTreeItem::newChild(int column, AbstractTreeItem *item) {
-  if(column >= columnCount()) {
-    qWarning() << "AbstractTreeItem::newChild() cannot append Child to not existing column!" << this << column;
+bool AbstractTreeItem::newChilds(const QList<AbstractTreeItem *> &items) {
+  if(items.isEmpty())
     return false;
-  }
-  
-  if(!_childItems.contains(column)) {
-    _childItems[column] = QList<AbstractTreeItem *>();
-  }
 
-  int newRow = _childItems[column].count();
-  emit beginAppendChilds(column, newRow, newRow);
-  _childItems[column].append(item);
+  int nextRow = childCount();
+  int lastRow = nextRow + items.count() - 1;
+
+  emit beginAppendChilds(nextRow, lastRow);
+  _childItems << items;
   emit endAppendChilds();
-  
-  return true;
-}
 
-bool AbstractTreeItem::newChild(AbstractTreeItem *item) {
-  return newChild(defaultColumn(), item);
+  return true;
 }
 
-bool AbstractTreeItem::removeChild(int column, int row) {
-  if(!_childItems.contains(column) || row >= childCount(column))
+bool AbstractTreeItem::removeChild(int row) {
+  if(row < 0 || childCount() <= row)
     return false;
 
-  emit beginRemoveChilds(column, row, row);
-  AbstractTreeItem *treeitem = _childItems[column].takeAt(row);
-  treeitem->deleteLater();
+  child(row)->removeAllChilds();
+  emit beginRemoveChilds(row, row);
+  AbstractTreeItem *treeitem = _childItems.takeAt(row);
+  delete treeitem;
   emit endRemoveChilds();
 
+  checkForDeletion();
+
   return true;
 }
 
-bool AbstractTreeItem::removeChild(int row) {
-  return removeChild(defaultColumn(), row);
-}
+void AbstractTreeItem::removeAllChilds() {
+  const int numChilds = childCount();
 
-bool AbstractTreeItem::removeChildById(int column, const quint64 &id) {
-  if(!_childItems.contains(column))
-    return false;
+  if(numChilds == 0)
+    return;
 
-  for(int i = 0; i < _childItems[column].count(); i++) {
-    if(_childItems[column][i]->id() == id)
-      return removeChild(column, i);
-  }
-  return false;
-}
+  AbstractTreeItem *child;
 
-bool AbstractTreeItem::removeChildById(const quint64 &id) {
-  return removeChildById(defaultColumn(), id);
-}
+  QList<AbstractTreeItem *>::iterator childIter;
 
-void AbstractTreeItem::removeAllChilds() {
-  AbstractTreeItem *child;
+  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++;
+  }
 
-  QHash<int, QList<AbstractTreeItem *> >::iterator columnIter = _childItems.begin();
-  while(columnIter != _childItems.end()) {
-    if(columnIter->count() > 0) {
-      emit beginRemoveChilds(columnIter.key(), 0, columnIter->count() - 1);
-      QList<AbstractTreeItem *>::iterator childIter = columnIter->begin();
-      while(childIter != columnIter->end()) {
-	child = *childIter;
-	// child->removeAllChilds();
-	childIter = columnIter->erase(childIter);
-	child->deleteLater();
-      }
-      emit endRemoveChilds();
-    }
-    columnIter++;
+  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);
+void AbstractTreeItem::removeChildLater(AbstractTreeItem *child) {
+  Q_ASSERT(child);
+  QCoreApplication::postEvent(this, new RemoveChildLaterEvent(child));
 }
 
-AbstractTreeItem *AbstractTreeItem::childById(int column, const quint64 &id) const {
-  if(!_childItems.contains(column))
-    return 0;
+void AbstractTreeItem::customEvent(QEvent *event) {
+  if(event->type() != QEvent::User)
+    return;
 
-  for(int i = 0; i < _childItems[column].count(); i++) {
-    if(_childItems[column][i]->id() == id)
-      return _childItems[column][i];
-  }
-  return 0;
-}
+  event->accept();
 
-AbstractTreeItem *AbstractTreeItem::childById(const quint64 &id) const {
-  return childById(defaultColumn(), id);
-}
+  RemoveChildLaterEvent *removeEvent = static_cast<RemoveChildLaterEvent *>(event);
+  int childRow = _childItems.indexOf(removeEvent->child());
+  if(childRow == -1)
+    return;
 
-int AbstractTreeItem::childCount(int column) const {
-  if(!_childItems.contains(column))
-    return 0;
-  else
-    return _childItems[column].count();
+  removeChild(childRow);
 }
 
-int AbstractTreeItem::childCount() const {
-  return childCount(defaultColumn());
-}
+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 AbstractTreeItem::column() const {
-  if(!parent())
-    return -1;
+  int oldRow = row();
+  if(oldRow == -1)
+    return false;
 
-  QHash<int, QList<AbstractTreeItem*> >::const_iterator iter = parent()->_childItems.constBegin();
-  while(iter != parent()->_childItems.constEnd()) {
-    if(iter->contains(const_cast<AbstractTreeItem *>(this)))
-      return iter.key();
-    iter++;
-  }
+  emit parent()->beginRemoveChilds(oldRow, oldRow);
+  parent()->_childItems.removeAt(oldRow);
+  emit parent()->endRemoveChilds();
+
+  AbstractTreeItem *oldParent = parent();
+  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;
+
+  if(oldParent)
+    oldParent->checkForDeletion();
 
-  qWarning() << "AbstractTreeItem::column(): unable to determine the Column of" << this;
-  return parent()->defaultColumn();
+  return success;
 }
 
-int AbstractTreeItem::row() const {
-  if(!parent())
-    return -1;
+AbstractTreeItem *AbstractTreeItem::child(int row) const {
+  if(childCount() <= row)
+    return 0;
   else
-    return parent()->_childItems[column()].indexOf(const_cast<AbstractTreeItem *>(this));
+    return _childItems[row];
 }
 
-AbstractTreeItem *AbstractTreeItem::parent() const {
-  return qobject_cast<AbstractTreeItem *>(QObject::parent());
+int AbstractTreeItem::childCount(int column) const {
+  if(column > 0)
+    return 0;
+  else
+    return _childItems.count();
 }
 
-Qt::ItemFlags AbstractTreeItem::flags() const {
-  return _flags;
-}
+int AbstractTreeItem::row() const {
+  if(!parent()) {
+    qWarning() << "AbstractTreeItem::row():" << this << "has no parent AbstractTreeItem as it's parent! parent is" << QObject::parent();
+    return -1;
+  }
 
-void AbstractTreeItem::setFlags(Qt::ItemFlags flags) {
-  _flags = flags;
+  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++;
+    }
+  }
+  qDebug() << "==== End Of Childlist ====";
 }
 
 /*****************************************
@@ -245,7 +253,7 @@ PropertyMapItem::PropertyMapItem(AbstractTreeItem *parent)
 
 PropertyMapItem::~PropertyMapItem() {
 }
-  
+
 QVariant PropertyMapItem::data(int column, int role) const {
   if(column >= columnCount())
     return QVariant();
@@ -254,11 +262,12 @@ QVariant PropertyMapItem::data(int column, int role) const {
   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();
   }
-  
+
 }
 
 bool PropertyMapItem::setData(int column, const QVariant &value, int role) {
@@ -272,7 +281,7 @@ bool PropertyMapItem::setData(int column, const QVariant &value, int role) {
 int PropertyMapItem::columnCount() const {
   return _propertyOrder.count();
 }
-  
+
 void PropertyMapItem::appendProperty(const QString &property) {
   _propertyOrder << property;
 }
@@ -289,6 +298,19 @@ TreeModel::TreeModel(const QList<QVariant> &data, QObject *parent)
 {
   rootItem = new SimpleTreeItem(data, 0);
   connectItem(rootItem);
+
+  if(Quassel::isOptionSet("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() {
@@ -298,62 +320,48 @@ TreeModel::~TreeModel() {
 QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) const {
   if(!hasIndex(row, column, parent))
     return QModelIndex();
-  
-  AbstractTreeItem *parentItem;
-  
-  if(!parent.isValid())
-    parentItem = rootItem;
-  else
-    parentItem = static_cast<AbstractTreeItem*>(parent.internalPointer());
-  
-  AbstractTreeItem *childItem = parentItem->child(parent.column(), row);
 
-  if(childItem)
-    return createIndex(row, column, childItem);
-  else
-    return QModelIndex();
-}
+  AbstractTreeItem *parentItem;
 
-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);
-  
+
+  AbstractTreeItem *childItem = parentItem->child(row);
+
   if(childItem)
-    return createIndex(childItem->row(), 0, childItem);
+    return createIndex(row, column, childItem);
   else
     return QModelIndex();
 }
 
-QModelIndex TreeModel::indexByItem(AbstractTreeItem *item, int column) const {
+QModelIndex TreeModel::indexByItem(AbstractTreeItem *item) const {
   if(item == 0) {
     qWarning() << "TreeModel::indexByItem(AbstractTreeItem *item) received NULL-Pointer";
     return QModelIndex();
   }
-  
+
   if(item == rootItem)
     return QModelIndex();
   else
-    return createIndex(item->row(), column, item);
-
+    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();
-  
-  return createIndex(parentItem->row(), childItem->column(), parentItem);
+
+  return createIndex(parentItem->row(), 0, parentItem);
 }
 
 int TreeModel::rowCount(const QModelIndex &parent) const {
@@ -368,22 +376,18 @@ 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 {
@@ -403,12 +407,12 @@ bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int rol
 }
 
 Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const {
-  AbstractTreeItem *item;
-  if(!index.isValid())
-    item = rootItem;
-  else
-    item = static_cast<AbstractTreeItem *>(index.internalPointer());
-  return item->flags();
+  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 {
@@ -427,7 +431,7 @@ 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;
@@ -439,27 +443,28 @@ void TreeModel::itemDataChanged(int column) {
 void TreeModel::connectItem(AbstractTreeItem *item) {
   connect(item, SIGNAL(dataChanged(int)),
 	  this, SLOT(itemDataChanged(int)));
-  
-  connect(item, SIGNAL(beginAppendChilds(int, int, int)),
-	  this, SLOT(beginAppendChilds(int, int, int)));
+
+  connect(item, SIGNAL(beginAppendChilds(int, int)),
+	  this, SLOT(beginAppendChilds(int, int)));
   connect(item, SIGNAL(endAppendChilds()),
 	  this, SLOT(endAppendChilds()));
-  
-  connect(item, SIGNAL(beginRemoveChilds(int, int, int)),
-	  this, SLOT(beginRemoveChilds(int, int, int)));
+
+  connect(item, SIGNAL(beginRemoveChilds(int, int)),
+	  this, SLOT(beginRemoveChilds(int, int)));
   connect(item, SIGNAL(endRemoveChilds()),
 	  this, SLOT(endRemoveChilds()));
 }
 
-void TreeModel::beginAppendChilds(int column, int firstRow, int lastRow) {
+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, column);
+
+  QModelIndex parent = indexByItem(parentItem);
   Q_ASSERT(!_aboutToRemoveOrInsert);
-  
+
   _aboutToRemoveOrInsert = true;
   _childStatus = ChildStatus(parent, rowCount(parent), firstRow, lastRow);
   beginInsertRows(parent, firstRow, lastRow);
@@ -473,49 +478,111 @@ void TreeModel::endAppendChilds() {
   }
   Q_ASSERT(_aboutToRemoveOrInsert);
   ChildStatus cs = _childStatus;
-  QModelIndex parent = indexByItem(parentItem, cs.parent.column());
+  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(parent.column(), i));
+    connectItem(parentItem->child(i));
   }
   endInsertRows();
 }
 
-void TreeModel::beginRemoveChilds(int column, int firstRow, int lastRow) {
+void TreeModel::beginRemoveChilds(int firstRow, int lastRow) {
   AbstractTreeItem *parentItem = qobject_cast<AbstractTreeItem *>(sender());
   if(!parentItem) {
     qWarning() << "TreeModel::beginRemoveChilds(): cannot append Childs to unknown parent";
     return;
   }
-  QModelIndex parent = indexByItem(parentItem, column);
+
+  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(column) > 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 append Childs to unknown parent";
+    qWarning() << "TreeModel::endRemoveChilds(): cannot remove Childs from unknown parent";
     return;
   }
+
+  // concistency checks
   Q_ASSERT(_aboutToRemoveOrInsert);
   ChildStatus cs = _childStatus;
-  QModelIndex parent = indexByItem(parentItem, cs.parent.column());
+  QModelIndex parent = indexByItem(parentItem);
   Q_ASSERT(cs.parent == parent);
   Q_ASSERT(rowCount(parent) == cs.childCount - cs.end + cs.start - 1);
-  
   _aboutToRemoveOrInsert = false;
+
   endRemoveRows();
 }
 
 void TreeModel::clear() {
   rootItem->removeAllChilds();
 }
+
+void TreeModel::debug_rowsAboutToBeInserted(const QModelIndex &parent, int start, int end) {
+  qDebug() << "debug_rowsAboutToBeInserted" << parent << parent.internalPointer() << parent.data().toString() << rowCount(parent) << start << end;
+}
+
+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();
+  }
+}
+
+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();
+  }
+}
+
+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;
+  }
+}