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#pragma once
#include <QUndoStack>
#include "undo/undo_command.h"
class Node;
class Datum;
class Graph;
class UndoCommand;
class UndoStack : public QUndoStack
{
public:
UndoStack(QObject* parent=NULL);
/*
* Performs a pointer swap for all commands in the stack
*/
template <class T>
void swapPointer(T* a, T* b)
{
for (int i=0; i < count(); ++i)
swapPointer(a, b, command(i));
}
void push(UndoCommand* c);
protected:
/*
* Performs a pointer swap for a specific command.
* (and recursively on its children)
*/
template <class T>
static void swapPointer(T* a, T* b, const QUndoCommand* cmd)
{
if (auto u = dynamic_cast<const UndoCommand*>(cmd))
u->swapPointer(a, b);
for (int i=0; i < cmd->childCount(); ++i)
swapPointer(a, b, cmd->child(i));
}
};
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