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#include <Python.h>
#include "undo/undo_delete_datum.h"
#include "undo/undo_delete_multi.h"
#include "undo/undo_stack.h"
#include "app/app.h"
#include "graph/serialize/serializer.h"
#include "graph/serialize/deserializer.h"
#include "graph/proxy/graph.h"
#include "graph/datum.h"
#include "graph/node.h"
#include "graph/graph_node.h"
UndoDeleteDatum::UndoDeleteDatum(Datum* d, UndoDeleteMulti* parent)
: UndoCommand(parent), d(d), n(static_cast<GraphNode*>(d->parentNode()))
{
Q_ASSERT(dynamic_cast<GraphNode*>(d->parentNode()));
setText("'delete datum'");
}
UndoDeleteDatum::UndoDeleteDatum(Datum* d)
: UndoDeleteDatum(d, NULL)
{
// Nothing to do here
}
////////////////////////////////////////////////////////////////////////////////
void UndoDeleteDatum::swapPointer(Datum* a, Datum* b) const
{
if (d == a)
d = b;
}
void UndoDeleteDatum::swapPointer(Node* a, Node* b) const
{
if (n == a)
{
Q_ASSERT(dynamic_cast<GraphNode*>(b));
n = static_cast<GraphNode*>(b);
}
}
////////////////////////////////////////////////////////////////////////////////
void UndoDeleteDatum::redo()
{
// Serialize d into data byte array
auto i = App::instance()->getProxy()->canvasInfo();
data = SceneSerializer::serializeDatum(d, &i);
// Tell the graph engine to delete the datum
n->removeDatum(d);
}
void UndoDeleteDatum::undo()
{
// Deserialize the target datum into its parent node
SceneDeserializer::Info ds;
SceneDeserializer::deserializeDatum(data, n, &ds);
// Extract the new datum pointer
{
auto d_new = n->childDatums().back();
stack->swapPointer(d, d_new);
d = d_new;
}
n->triggerWatchers();
App::instance()->getProxy()->setPositions(ds.frames);
}
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