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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#ifndef NODEVIEW_H
#define NODEVIEW_H
#include <QGraphicsView>
#include <QTimer>
#include "node/graph.h"
#include "nodeviewscene.h"
#include "widget/timelinewidget/view/handmovableview.h"
#include "widget/nodecopypaste/nodecopypaste.h"
OLIVE_NAMESPACE_ENTER
/**
* @brief A widget for viewing and editing node graphs
*
* This widget takes a NodeGraph object and constructs a QGraphicsScene representing its data, viewing and allowing
* the user to make modifications to it.
*/
class NodeView : public HandMovableView, public NodeCopyPasteWidget
{
Q_OBJECT
public:
NodeView(QWidget* parent);
virtual ~NodeView() override;
/**
* @brief Sets the graph to view
*/
void SetGraph(NodeGraph* graph);
/**
* @brief Delete selected nodes from graph (user-friendly/undoable)
*/
void DeleteSelected();
void SelectAll();
void DeselectAll();
void Select(const QList<Node*>& nodes);
void SelectWithDependencies(QList<Node *> nodes);
void SelectBlocks(const QList<Block*>& blocks);
void CopySelected(bool cut);
void Paste();
void Duplicate();
signals:
/**
* @brief Signal emitted when the selected nodes have changed
*/
void SelectionChanged(QList<Node*> selected_nodes);
protected:
virtual void keyPressEvent(QKeyEvent *event) override;
virtual void mousePressEvent(QMouseEvent *event) override;
virtual void mouseMoveEvent(QMouseEvent *event) override;
virtual void mouseReleaseEvent(QMouseEvent* event) override;
virtual void wheelEvent(QWheelEvent* event) override;
private:
void PlaceNode(NodeViewItem* n, const QPointF& pos);
void AttachNodesToCursor(const QList<Node*>& nodes);
void AttachItemsToCursor(const QList<NodeViewItem*>& items);
void DetachItemsFromCursor();
void SetFlowDirection(NodeViewCommon::FlowDirection dir);
void MoveAttachedNodesToCursor(const QPoint &p);
void ConnectSelectionChangedSignal();
void ReconnectSelectionChangedSignal();
void DisconnectSelectionChangedSignal();
void UpdateBlockFilter();
void AssociateNodeWithSelectedBlocks(Node* n);
void DisassociateNode(Node* n, bool remove_from_map);
NodeGraph* graph_;
struct AttachedItem {
NodeViewItem* item;
QPointF original_pos;
};
QList<AttachedItem> attached_items_;
NodeViewEdge* drop_edge_;
NodeInput* drop_input_;
NodeViewScene scene_;
QList<Block*> selected_blocks_;
QHash<Node*, QList<Block*> > association_map_;
QHash<Block*, QList<Node*> > temporary_association_map_;
enum FilterMode {
kFilterShowAll,
kFilterShowSelectedBlocks
};
FilterMode filter_mode_;
double scale_;
private slots:
void ValidateFilter();
void AssociatedNodeDestroyed();
void GraphEdgeAdded(NodeEdgePtr edge);
void GraphEdgeRemoved(NodeEdgePtr edge);
/**
* @brief Internal function triggered when any change is signalled from the QGraphicsScene
*
* Current primary function is to inform all NodeViewEdges to re-adjust in case any Nodes have moved
*/
void ItemsChanged();
/**
* @brief Receiver for when the scene's selected items change
*/
void SceneSelectionChangedSlot();
/**
* @brief Receiver for when the user right clicks (or otherwise requests a context menu)
*/
void ShowContextMenu(const QPoint &pos);
/**
* @brief Receiver for when the user requests a new node from the add menu
*/
void CreateNodeSlot(QAction* action);
/**
* @brief Receiver for setting the direction from the context menu
*/
void ContextMenuSetDirection(QAction* action);
/**
* @brief Receiver for auto-position descendents menu action
*/
void AutoPositionDescendents();
/**
* @brief Receiver for the user changing the filter
*/
void ContextMenuFilterChanged(QAction* action);
};
OLIVE_NAMESPACE_EXIT
#endif // NODEVIEW_H
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