120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef NODEVIEW_H
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#define NODEVIEW_H
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#include <QGraphicsView>
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#include "node/graph.h"
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#include "widget/nodeview/nodeviewedge.h"
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#include "widget/nodeview/nodeviewitem.h"
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/**
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* @brief A widget for viewing and editing node graphs
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*
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* This widget takes a NodeGraph object and constructs a QGraphicsScene representing its data, viewing and allowing
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* the user to make modifications to it.
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*/
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class NodeView : public QGraphicsView
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{
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Q_OBJECT
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public:
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NodeView(QWidget* parent);
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/**
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* @brief Sets the graph to view
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*/
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void SetGraph(NodeGraph* graph);
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/**
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* @brief Retrieve the graphical widget corresponding to a specific Node
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*
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* In situations where you know what Node you're working with but need the UI object (e.g. for positioning), this
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* static function will retrieve the NodeViewItem (Node UI representation) connected to this Node in a certain
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* QGraphicsScene. This can be called from any other UI object, since it'll have a reference to the QGraphicsScene
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* through QGraphicsItem::scene().
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*
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* If the scene does not contain a widget for this node (usually meaning the node's graph is not the active graph
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* in this view/scene), this function returns nullptr.
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*/
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static NodeViewItem* NodeToUIObject(QGraphicsScene* scene, Node* n);
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/**
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* @brief Retrieve the graphical widget corresponding to a specific NodeEdge
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*
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* Same as NodeToUIObject() but returns a NodeViewEdge corresponding to a NodeEdgePtr instead.
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*/
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static NodeViewEdge* EdgeToUIObject(QGraphicsScene* scene, NodeEdgePtr n);
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/**
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* @brief Overloaded NodeToUIObject(QGraphicsScene* scene, Node* n) if you have direct access to a NodeView instance
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*/
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NodeViewItem* NodeToUIObject(Node* n);
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/**
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* @brief Overloaded EdgeToUIObject(QGraphicsScene* scene, NodeEdgePtr n) if you have direct access to a NodeView instance
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*/
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NodeViewEdge* EdgeToUIObject(NodeEdgePtr n);
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signals:
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/**
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* @brief Signal emitted when the selected nodes have changed
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*/
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void SelectionChanged(QList<Node*> selected_nodes);
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private:
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NodeGraph* graph_;
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QGraphicsScene scene_;
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private slots:
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/**
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* @brief Slot when an edge is added to a graph (SetGraph() connects this)
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*
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* This should NEVER be called directly, only connected to a NodeGraph. To add an edge (i.e. connect two node
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* parameters together), use NodeParam::ConnectEdge().
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*/
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void AddEdge(NodeEdgePtr edge);
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/**
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* @brief Slot when an edge is removed from a graph (SetGraph() connects this)
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*
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* This should NEVER be called directly, only connected to a NodeGraph. To remove an edge (i.e. disconnect two node
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* parameters), use NodeParam::DisconnectEdge().
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*/
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void RemoveEdge(NodeEdgePtr edge);
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/**
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* @brief Internal function triggered when any change is signalled from the QGraphicsScene
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*
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* Current primary function is to inform all NodeViewEdges to re-adjust in case any Nodes have moved
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*/
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void ItemsChanged();
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/**
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* @brief Receiver for when the scene's selected items change
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*/
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void SceneSelectionChangedSlot();
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};
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#endif // NODEVIEW_H
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