/
TreeModel.cpp
971 lines (788 loc) · 24.1 KB
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TreeModel.cpp
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#include "TreeModel.h"
#include <algorithm>
#include <functional>
namespace wxutil
{
wxString TreeModel::Column::getWxType() const
{
static std::vector<wxString> types(NumTypes);
if (types.empty())
{
types[String] = "string";
// we store numbers as strings
types[Integer] = "string";
types[Double] = "string";
types[Boolean] = "bool";
types[Icon] = "icon";
types[IconText] = "wxDataViewIconText";
types[Pointer] = "void*";
}
return types[type];
}
// TreeModel nodes form a directed acyclic graph
class TreeModel::Node :
public util::Noncopyable
{
public:
Node* parent; // NULL for the root node
// The item will use a Node* pointer as ID, which is possible
// since the wxDataViewItem is using void* as ID type
wxDataViewItem item;
typedef std::vector<wxVariant> Values;
Values values;
typedef std::vector<NodePtr> Children;
Children children;
typedef std::vector<wxDataViewItemAttr> Attributes;
Attributes attributes;
typedef std::vector<bool> EnabledFlags; // Each value can be flagged as enabled/disabled
EnabledFlags enabledFlags;
// Public constructor, does not accept NULL pointers
Node(Node* parent_) :
parent(parent_),
item(reinterpret_cast<wxDataViewItem::Type>(this))
{
// Use CreateRoot() instead of passing NULL
assert(parent_ != NULL);
}
private:
// Private constructor creates a root node, has a wxDataViewItem ID == NULL
Node() :
parent(NULL),
item(NULL)
{}
public:
static NodePtr createRoot()
{
return NodePtr(new Node);
}
bool remove(TreeModel::Node* child)
{
for (Children::iterator i = children.begin();
i != children.end(); ++i)
{
if (i->get() == child)
{
children.erase(i);
return true;
}
}
return false;
}
};
// -------------------------------------------------------------------------------
wxDEFINE_EVENT(EV_TREEMODEL_POPULATION_FINISHED, TreeModel::PopulationFinishedEvent);
wxDEFINE_EVENT(EV_TREEMODEL_POPULATION_PROGRESS, TreeModel::PopulationProgressEvent);
TreeModel::PopulationFinishedEvent::PopulationFinishedEvent(int id) :
wxEvent(id, EV_TREEMODEL_POPULATION_FINISHED),
_treeModel(NULL)
{}
TreeModel::PopulationFinishedEvent::PopulationFinishedEvent(TreeModel::Ptr store, int id) :
wxEvent(id, EV_TREEMODEL_POPULATION_FINISHED),
_treeModel(store)
{}
// You *must* copy here the data to be transported
TreeModel::PopulationFinishedEvent::PopulationFinishedEvent(const TreeModel::PopulationFinishedEvent& event) :
wxEvent(event),
_treeModel(event._treeModel)
{}
// Required for sending with wxPostEvent()
wxEvent* TreeModel::PopulationFinishedEvent::Clone() const
{
return new PopulationFinishedEvent(*this);
}
TreeModel::Ptr TreeModel::PopulationFinishedEvent::GetTreeModel() const
{
return _treeModel;
}
void TreeModel::PopulationFinishedEvent::SetTreeModel(TreeModel::Ptr store)
{
_treeModel = store;
}
TreeModel::PopulationProgressEvent::PopulationProgressEvent(int id) :
wxEvent(id, EV_TREEMODEL_POPULATION_PROGRESS)
{}
TreeModel::PopulationProgressEvent::PopulationProgressEvent(const wxString& message, int id) :
wxEvent(id, EV_TREEMODEL_POPULATION_PROGRESS),
_message(message)
{}
TreeModel::PopulationProgressEvent::PopulationProgressEvent(const TreeModel::PopulationProgressEvent& event) :
wxEvent(event),
_message(event._message)
{}
wxEvent* TreeModel::PopulationProgressEvent::Clone() const
{
return new PopulationProgressEvent(*this);
}
const wxString& TreeModel::PopulationProgressEvent::GetMessage() const
{
return _message;
}
void TreeModel::PopulationProgressEvent::SetMessage(const wxString& message)
{
_message = message;
}
// -------------------------------------------------------------------------------
TreeModel::TreeModel(const ColumnRecord& columns, bool isListModel) :
_columns(columns),
_rootNode(Node::createRoot()),
_defaultStringSortColumn(-1),
_hasDefaultCompare(false),
_isListModel(isListModel)
{}
TreeModel::TreeModel(const TreeModel& existingModel) :
_columns(existingModel._columns),
_rootNode(existingModel._rootNode),
_defaultStringSortColumn(existingModel._defaultStringSortColumn),
_hasDefaultCompare(existingModel._hasDefaultCompare),
_isListModel(existingModel._isListModel)
{}
TreeModel::~TreeModel()
{}
const TreeModel::NodePtr& TreeModel::getRootNode() const
{
return _rootNode;
}
const TreeModel::ColumnRecord& TreeModel::GetColumns() const
{
return _columns;
}
TreeModel::Row TreeModel::AddItem()
{
return AddItem(_rootNode->item);
}
TreeModel::Row TreeModel::AddItem(const wxDataViewItem& parent)
{
// Redirect to the root node for invalid items
Node* parentNode = !parent.IsOk() ? _rootNode.get() : static_cast<Node*>(parent.GetID());
NodePtr node(new Node(parentNode));
parentNode->children.push_back(node);
return Row(node->item, *this);
}
bool TreeModel::RemoveItem(const wxDataViewItem& item)
{
if (item.IsOk())
{
Node* node = static_cast<Node*>(item.GetID());
Node* parent = node->parent;
if (parent == NULL) return false; // cannot remove the root node
if (parent->remove(node))
{
ItemDeleted(parent->item, item);
return true;
}
}
return false;
}
int TreeModel::RemoveItems(const std::function<bool (const TreeModel::Row&)>& predicate)
{
return RemoveItemsRecursively(GetRoot(), predicate);
}
int TreeModel::RemoveItemsRecursively(const wxDataViewItem& parent, const std::function<bool (const TreeModel::Row&)>& predicate)
{
Node* parentNode = !parent.IsOk() ? _rootNode.get() : static_cast<Node*>(parent.GetID());
int deleteCount = 0;
wxDataViewItemArray itemsToDelete;
for (Node::Children::const_iterator i = parentNode->children.begin();
i != parentNode->children.end(); ++i)
{
Row row((*i)->item, *this);
if (predicate(row))
{
itemsToDelete.push_back((*i)->item);
}
}
if (!itemsToDelete.IsEmpty())
{
// It seems that the wxDataViewCtrl has trouble in case a highlighted row is removed
// and the actual nodes have already been deleted, so remove them afterwards.
ItemsDeleted(parent, itemsToDelete);
// Remove these items
std::for_each(itemsToDelete.begin(), itemsToDelete.end(), [&] (const wxDataViewItem& item)
{
Node* nodeToDelete = static_cast<Node*>(item.GetID());
parentNode->remove(nodeToDelete);
deleteCount++;
});
}
for (Node::Children::const_iterator i = parentNode->children.begin();
i != parentNode->children.end(); ++i)
{
deleteCount += RemoveItemsRecursively((*i)->item, predicate);
}
return deleteCount;
}
TreeModel::Row TreeModel::GetRootItem()
{
return Row(GetRoot(), *this);
}
void TreeModel::Clear()
{
// To work around a problem in wxGTK 3.0.5+, trigger
// an ItemRemoved call for all top-level children before
// actually deleting them.
// The Cleared() call below might query GetParent() calls
// for nodes that are still present in the internal tree
wxDataViewItemArray children;
GetChildren(_rootNode->item, children);
if (!children.empty())
{
ItemsDeleted(_rootNode->item, children);
}
// Now it should be safe to free all the nodes
_rootNode->values.clear();
_rootNode->children.clear();
Cleared();
}
void TreeModel::SetDefaultStringSortColumn(int index)
{
_defaultStringSortColumn = index;
}
void TreeModel::SetHasDefaultCompare(bool hasDefaultCompare)
{
_hasDefaultCompare = hasDefaultCompare;
}
void TreeModel::ForeachNode(const TreeModel::VisitFunction& visitFunction)
{
// Skip the root node and traverse its immediate children recursively
std::for_each(_rootNode->children.begin(), _rootNode->children.end(), [&] (const NodePtr& node)
{
ForeachNodeRecursive(node, visitFunction);
});
}
void TreeModel::ForeachNodeRecursive(const TreeModel::NodePtr& node, const TreeModel::VisitFunction& visitFunction)
{
wxutil::TreeModel::Row row(node->item, *this);
visitFunction(row);
// Enter the recursion
std::for_each(node->children.begin(), node->children.end(), [&] (const NodePtr& child)
{
ForeachNodeRecursive(child, visitFunction);
});
}
void TreeModel::ForeachNodeReverse(const TreeModel::VisitFunction& visitFunction)
{
// Skip the root node and traverse its immediate children recursively
for (Node::Children::const_reverse_iterator i = _rootNode->children.rbegin(); i != _rootNode->children.rend(); ++i)
{
ForeachNodeRecursiveReverse(*i, visitFunction);
}
}
void TreeModel::ForeachNodeRecursiveReverse(const TreeModel::NodePtr& node, const TreeModel::VisitFunction& visitFunction)
{
wxutil::TreeModel::Row row(node->item, *this);
visitFunction(row);
// Enter the recursion
for (Node::Children::const_reverse_iterator i = node->children.rbegin(); i != node->children.rend(); ++i)
{
ForeachNodeRecursiveReverse(*i, visitFunction);
}
}
void TreeModel::SortModel(const TreeModel::SortFunction& sortFunction)
{
SortModelRecursive(_rootNode, sortFunction);
}
void TreeModel::SortModelByColumn(const TreeModel::Column& column)
{
SortModelRecursive(_rootNode, [&] (const wxDataViewItem& a, const wxDataViewItem& b)->bool
{
Row rowA(a, *this);
Row rowB(b, *this);
if (column.type == Column::IconText)
{
wxDataViewIconText txtA = rowA[column];
wxDataViewIconText txtB = rowB[column];
return txtA.GetText() < txtB.GetText();
}
else if (column.type == Column::String)
{
std::string txtA = rowA[column];
std::string txtB = rowB[column];
return txtA < txtB;
}
else if (column.type == Column::Integer)
{
int intA = rowA[column].getInteger();
int intB = rowA[column].getInteger();
return intA < intB;
}
else if (column.type == Column::Double)
{
double dblA = rowA[column].getDouble();
double dblB = rowA[column].getDouble();
return dblA < dblB;
}
return false;
});
}
void TreeModel::SortModelFoldersFirst(const TreeModel::Column& stringColumn,
const TreeModel::Column& isFolderColumn)
{
SortModelRecursive(_rootNode, std::bind(&TreeModel::CompareFoldersFirst,
this,
std::placeholders::_1,
std::placeholders::_2,
stringColumn,
stringColumn.type == Column::String ? CompareStringVariants : CompareIconTextVariants,
isFolderColumn));
}
void TreeModel::SortModelRecursive(const TreeModel::NodePtr& node, const TreeModel::SortFunction& sortFunction)
{
// Use std::sort algorithm and small lambda to only pass wxDataViewItems to the client sort function
std::sort(node->children.begin(), node->children.end(), [&] (const NodePtr& a, const NodePtr& b)->bool
{
return sortFunction(a->item, b->item);
});
// Enter recursion
std::for_each(node->children.begin(), node->children.end(), [&] (const NodePtr& child)
{
SortModelRecursive(child, sortFunction);
});
}
wxDataViewItem TreeModel::FindString(const std::string& needle, const Column& column)
{
return FindRecursive(_rootNode, [&] (const Node& node)->bool
{
int colIndex = column.getColumnIndex();
if (column.type == Column::IconText)
{
if (static_cast<int>(node.values.size()) > colIndex)
{
wxDataViewIconText iconText;
iconText << node.values[colIndex];
return iconText.GetText() == needle;
}
}
else if (column.type == Column::String)
{
return static_cast<int>(node.values.size()) > colIndex &&
static_cast<std::string>(node.values[colIndex]) == needle;
}
return false;
});
}
wxDataViewItem TreeModel::FindInteger(long needle, const Column& column)
{
return FindRecursive(_rootNode, [&] (const Node& node)->bool
{
int colIndex = column.getColumnIndex();
return static_cast<int>(node.values.size()) > colIndex &&
static_cast<long>(node.values[colIndex]) == needle;
});
}
wxDataViewItem TreeModel::FindRecursive(const TreeModel::NodePtr& node, const std::function<bool (const TreeModel::Node&)>& predicate)
{
// Test the node itself
if (predicate(*node))
{
return node->item;
}
// Then test all children, aborting on first success
for (Node::Children::const_iterator i = node->children.begin(); i != node->children.end(); ++i)
{
wxDataViewItem item = FindRecursive(*i, predicate);
if (item.IsOk())
{
return item;
}
}
// Return an empty data item, which is "not ok"
return wxDataViewItem();
}
wxDataViewItem TreeModel::FindRecursiveUsingRows(const TreeModel::NodePtr& node, const std::function<bool (TreeModel::Row&)>& predicate)
{
if (node->item.IsOk())
{
Row row(node->item, *this);
// Test the node itself
if (predicate(row))
{
return node->item;
}
}
// Then test all children, aborting on first success
for (Node::Children::const_iterator i = node->children.begin(); i != node->children.end(); ++i)
{
wxDataViewItem item = FindRecursiveUsingRows(*i, predicate);
if (item.IsOk())
{
return item;
}
}
// Return an empty data item, which is "not ok"
return wxDataViewItem();
}
bool TreeModel::HasDefaultCompare() const
{
return _hasDefaultCompare;
}
unsigned int TreeModel::GetColumnCount() const
{
return static_cast<unsigned int>(_columns.size());
};
// return type as reported by wxVariant
wxString TreeModel::GetColumnType(unsigned int col) const
{
return _columns[col].getWxType();
}
// get value into a wxVariant
void TreeModel::GetValue(wxVariant &variant,
const wxDataViewItem &item, unsigned int col) const
{
Node* owningNode = item.IsOk() ? static_cast<Node*>(item.GetID()) : _rootNode.get();
if (col < owningNode->values.size())
{
variant = owningNode->values[col];
}
}
bool TreeModel::SetValue(const wxVariant& variant,
const wxDataViewItem& item,
unsigned int col)
{
Node* owningNode = item.IsOk() ? static_cast<Node*>(item.GetID()) : _rootNode.get();
if (owningNode->values.size() < col + 1)
{
owningNode->values.resize(col + 1);
}
owningNode->values[col] = variant;
return true;
}
bool TreeModel::GetAttr(const wxDataViewItem& item, unsigned int col, wxDataViewItemAttr& attr) const
{
if (!item.IsOk())
{
return false;
}
Node* owningNode = static_cast<Node*>(item.GetID());
if (col < owningNode->attributes.size())
{
attr = owningNode->attributes[col];
return true;
}
return false;
}
void TreeModel::SetAttr(const wxDataViewItem& item, unsigned int col, const wxDataViewItemAttr& attr) const
{
if (!item.IsOk())
{
return;
}
Node* owningNode = static_cast<Node*>(item.GetID());
if (owningNode->attributes.size() < col + 1)
{
owningNode->attributes.resize(col + 1);
}
owningNode->attributes[col] = attr;
}
wxDataViewItem TreeModel::GetParent(const wxDataViewItem& item) const
{
// It's ok to ask for invisible root node's parent
if (!item.IsOk())
{
return wxDataViewItem(NULL);
}
Node* owningNode = static_cast<Node*>(item.GetID());
if (owningNode->parent != NULL)
{
return owningNode->parent->item;
}
return wxDataViewItem(NULL);
}
bool TreeModel::IsContainer(const wxDataViewItem& item) const
{
// greebo: it appears that invalid items are treated as containers, they can have children.
// The wxDataViewCtrl has such a root node with invalid items
if (!item.IsOk())
{
return true;
}
#ifdef __WXGTK__
// greebo: The GTK DataViewCtrl implementation treats nodes differently
// based on whether they have children or not. If a tree model node has no children
// now it's not possible to add any children later on, causing assertions.
// wxGTK wants to know *in advance* whether a node has children, so let's assume true
// unless this is a listmodel (in which case non-root nodes never have children)
return !_isListModel ? true : false;
#else
// Regular implementation: return true if this node has child nodes
Node* owningNode = static_cast<Node*>(item.GetID());
return owningNode != NULL && !owningNode->children.empty();
#endif
}
unsigned int TreeModel::GetChildren(const wxDataViewItem& item, wxDataViewItemArray& children) const
{
// Requests for invalid items are asking for our root children, actually
Node* owningNode = !item.IsOk() ? _rootNode.get() : static_cast<Node*>(item.GetID());
for (Node::Children::const_iterator iter = owningNode->children.begin(); iter != owningNode->children.end(); ++iter)
{
children.Add((*iter)->item);
}
return static_cast<unsigned int>(owningNode->children.size());
}
wxDataViewItem TreeModel::GetRoot()
{
// The root item carries the NULL pointer, the other methods need to be able to deal with that
return _rootNode->item;
}
bool TreeModel::IsListModel() const
{
return _isListModel;
}
void TreeModel::SetIsListModel(bool isListModel)
{
_isListModel = isListModel;
}
int TreeModel::Compare(const wxDataViewItem& item1, const wxDataViewItem& item2, unsigned int column, bool ascending) const
{
Node* node1 = static_cast<Node*>(item1.GetID());
Node* node2 = static_cast<Node*>(item2.GetID());
if (!node1 || !node2)
return 0;
#if 0 // Don't handle folders first sorting here
if (!node1->children.empty() && node2->children.empty())
return ascending ? -1 : 1;
if (!node2->children.empty() && node1->children.empty())
return ascending ? 1 : -1;
#endif
if (_defaultStringSortColumn >= 0)
{
return ascending ?
node1->values[_defaultStringSortColumn].GetString().CmpNoCase(
node2->values[_defaultStringSortColumn].GetString()) :
node2->values[_defaultStringSortColumn].GetString().CmpNoCase(
node1->values[_defaultStringSortColumn].GetString());
}
// When clicking on the dataviewctrl headers, we need to support some default algorithm
// implement a few comparison types
switch (_columns[column].type)
{
case Column::String:
{
return ascending ?
node1->values[column].GetString().CmpNoCase(node2->values[column].GetString()) :
node2->values[column].GetString().CmpNoCase(node1->values[column].GetString());
}
case Column::IconText:
{
wxDataViewIconText val1;
val1 << node1->values[column];
wxDataViewIconText val2;
val2 << node2->values[column];
return ascending ? val1.GetText().CmpNoCase(val2.GetText()) :
val2.GetText().CmpNoCase(val1.GetText());
}
case Column::Double:
{
double val1 = node1->values[column].GetDouble();
double val2 = node2->values[column].GetDouble();
if (val1 == val2) return 0;
return ascending ? (val1 < val2 ? -1 : 1) :
(val2 < val1 ? -1 : 1);
}
case Column::Integer:
{
long val1 = node1->values[column].GetInteger();
long val2 = node2->values[column].GetInteger();
if (val1 == val2) return 0;
return ascending ? (val1 < val2 ? -1 : 1) :
(val2 < val1 ? -1 : 1);
}
case Column::Boolean:
{
bool val1 = node1->values[column].GetBool();
bool val2 = node2->values[column].GetBool();
if (val1 == val2) return 0;
return ascending ? (!val1 ? -1 : 1) : (val1 ? -1 : 1);
}
case Column::Pointer:
{
void* val1 = node1->values[column].GetVoidPtr();
void* val2 = node2->values[column].GetVoidPtr();
if (val1 == val2) return 0;
return ascending ? (val1 < val2 ? -1 : 1) :
(val2 < val1 ? -1 : 1);
}
case Column::Icon:
{
return 0; // no sense in comparing icons
}
default:
break; // break to return 0
};
return 0;
}
int TreeModel::CompareStringVariants(const wxVariant& a, const wxVariant& b)
{
wxVariant aName, bName;
return aName.GetString().CmpNoCase(bName.GetString());
}
int TreeModel::CompareIconTextVariants(const wxVariant& a, const wxVariant& b)
{
wxDataViewIconText aValue;
aValue << a;
wxDataViewIconText bValue;
bValue << b;
return aValue.GetText().CmpNoCase(bValue.GetText());
}
bool TreeModel::CompareFoldersFirst(const wxDataViewItem& a, const wxDataViewItem& b,
const TreeModel::Column& stringColumn,
const std::function<int(const wxVariant&, const wxVariant&)>& stringCompareFunc,
const TreeModel::Column& isFolderCol)
{
// Check if A or B are folders
wxVariant aIsFolder, bIsFolder;
GetValue(aIsFolder, a, isFolderCol.getColumnIndex());
GetValue(bIsFolder, b, isFolderCol.getColumnIndex());
if (aIsFolder)
{
// A is a folder, check if B is as well
if (bIsFolder)
{
// A and B are both folders
// Compare folder names
// greebo: We're not checking for equality here, shader names are unique
wxVariant aName, bName;
GetValue(aName, a, stringColumn.getColumnIndex());
GetValue(bName, b, stringColumn.getColumnIndex());
return stringCompareFunc(aName, bName) < 0;
}
else
{
// A is a folder, B is not, A sorts before
return true;
}
}
else
{
// A is not a folder, check if B is one
if (bIsFolder)
{
// A is not a folder, B is, so B sorts before A
return false;
}
else
{
// Neither A nor B are folders, compare names
// greebo: We're not checking for equality here, names are unique
wxVariant aName, bName;
GetValue(aName, a, stringColumn.getColumnIndex());
GetValue(bName, b, stringColumn.getColumnIndex());
return stringCompareFunc(aName, bName) < 0;
}
}
}
// Search functor which tries to find the next match for the given search string
// is agnostic of the search direction, it just gets invoked for each row.
class TreeModel::SearchFunctor
{
private:
const std::vector<TreeModel::Column>& _columns;
wxDataViewItem _previousMatch;
wxDataViewItem _match;
enum SearchState
{
SearchingForLastMatch,
Searching,
Found,
};
SearchState _state;
wxString _searchString;
public:
SearchFunctor(const wxString& searchString,
const std::vector<TreeModel::Column>& columns,
const wxDataViewItem& previousMatch) :
_columns(columns),
_previousMatch(previousMatch),
_state(previousMatch.IsOk() ? SearchingForLastMatch : Searching),
_searchString(searchString.Lower())
{}
const wxDataViewItem& getMatch() const
{
return _match;
}
void operator()(TreeModel::Row& row)
{
switch (_state)
{
case SearchingForLastMatch:
if (row.getItem() == _previousMatch)
{
_state = Searching;
return;
}
else
{
return; // skip until previousMatch is found
}
case Searching:
std::for_each(_columns.begin(), _columns.end(), [&](const TreeModel::Column& col)
{
if (col.type == TreeModel::Column::String)
{
wxVariant variant = row[col].getVariant();
if (!variant.IsNull() && variant.GetString().Lower().Contains(_searchString))
{
_match = row.getItem();
_state = Found;
}
}
else if (col.type == TreeModel::Column::IconText)
{
wxDataViewIconText iconText = static_cast<wxDataViewIconText>(row[col]);
if (iconText.GetText().Lower().Contains(_searchString))
{
_match = row.getItem();
_state = Found;
}
}
});
break;
case Found:
return; // done here
}
}
};
wxDataViewItem TreeModel::FindNextString(const wxString& needle,
const std::vector<TreeModel::Column>& columns, const wxDataViewItem& previousMatch)
{
SearchFunctor functor(needle, columns, previousMatch);
ForeachNode([&] (Row& row)
{
functor(row);
});
return functor.getMatch();
}
// Search for an item in the given columns (backwards), using previousMatch as reference point
wxDataViewItem TreeModel::FindPrevString(const wxString& needle,
const std::vector<TreeModel::Column>& columns, const wxDataViewItem& previousMatch)
{
SearchFunctor functor(needle, columns, previousMatch);
ForeachNodeReverse([&] (Row& row)
{
functor(row);
});
return functor.getMatch();
}
bool TreeModel::IsEnabled(const wxDataViewItem& item, unsigned int col) const
{
Node* owningNode = item.IsOk() ? static_cast<Node*>(item.GetID()) : _rootNode.get();
if (col < owningNode->enabledFlags.size())
{
return owningNode->enabledFlags[col];
}
// Column values without flags render as enabled by default
return true;
}
void TreeModel::SetEnabled(const wxDataViewItem& item, unsigned int col, bool enabled)
{
if (!item.IsOk())
{
return;
}
Node* owningNode = static_cast<Node*>(item.GetID());
if (owningNode->enabledFlags.size() < col + 1)
{
owningNode->enabledFlags.resize(col + 1, true); // fill with true by default
}
owningNode->enabledFlags[col] = enabled;
}
} // namespace