restored nodeview

2021-01-19 00:06:57 +11:00
parent 835b82205f
commit 8e7035bd40
10 changed files with 2307 additions and 14 deletions
@@ -0,0 +1,174 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2020 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 NODEVIEWITEM_H
+#define NODEVIEWITEM_H
+
+#include <QFontMetrics>
+#include <QGraphicsRectItem>
+#include <QLinearGradient>
+#include <QUndoCommand>
+#include <QWidget>
+
+#include "node/node.h"
+#include "nodeviewcommon.h"
+
+namespace olive {
+
+class NodeViewEdge;
+
+/**
+ * @brief A visual widget representation of a Node object to be used in a NodeView
+ *
+ * This widget can be collapsed or expanded to show/hide the node's various parameters.
+ *
+ * To retrieve the NodeViewItem for a certain Node, use NodeView::NodeToUIObject().
+ */
+class NodeViewItem : public QGraphicsRectItem
+{
+public:
+  NodeViewItem(QGraphicsItem* parent = nullptr);
+
+  QPointF GetNodePosition() const;
+  void SetNodePosition(const QPointF& pos);
+
+  /**
+   * @brief Set the Node to correspond to this widget
+   */
+  void SetNode(Node* n);
+
+  /**
+   * @brief Get currently attached node
+   */
+  Node* GetNode() const
+  {
+    return node_;
+  }
+
+  /**
+   * @brief Get expanded state
+   */
+  bool IsExpanded() const
+  {
+    return expanded_;
+  }
+
+  /**
+   * @brief Set expanded state
+   */
+  void SetExpanded(bool e, bool hide_titlebar = false);
+  void ToggleExpanded();
+
+  /**
+   * @brief Returns GLOBAL point that edges should connect to for any NodeParam member of this object
+   */
+  QPointF GetInputPoint(NodeInput* input, const QPointF &source_pos) const;
+  QPointF GetInputPoint(int input, const QPointF &source_pos) const;
+
+  QPointF GetOutputPoint() const;
+
+  /**
+   * @brief Sets the direction nodes are flowing
+   */
+  void SetFlowDirection(NodeViewCommon::FlowDirection dir);
+
+  static int DefaultTextPadding();
+
+  static int DefaultItemHeight();
+
+  static int DefaultItemWidth();
+
+  static int DefaultItemBorder();
+
+  qreal DefaultItemHorizontalPadding() const;
+
+  qreal DefaultItemVerticalPadding() const;
+
+  void AddEdge(NodeViewEdge* edge);
+  void RemoveEdge(NodeViewEdge* edge);
+
+  int GetIndexAt(QPointF pt) const;
+
+  NodeInput* GetInputAtIndex(int index) const
+  {
+    return node_inputs_.at(index);
+  }
+
+  void SetHighlightedIndex(int index);
+
+protected:
+  virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;
+
+  virtual void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+  virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+  virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+  virtual void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override;
+
+  virtual QVariant itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value) override;
+
+private:
+  void ReadjustAllEdges();
+
+  /**
+   * @brief Returns local rect of a NodeInput in array node_inputs_[index]
+   */
+  QRectF GetInputRect(int index) const;
+
+  /**
+   * @brief Returns local point that edges should connect to for a NodeInput in array node_inputs_[index]
+   */
+  QPointF GetInputPointInternal(int index, const QPointF &source_pos) const;
+
+  /**
+   * @brief Reference to attached Node
+   */
+  Node* node_;
+
+  /**
+   * @brief Cached list of node inputs
+   */
+  QList<NodeInput*> node_inputs_;
+
+  /**
+   * @brief Rectangle of the Node's title bar (equal to rect() when collapsed)
+   */
+  QRectF title_bar_rect_;
+
+  /// Sizing variables to use when drawing
+  int node_border_width_;
+
+  /**
+   * @brief Expanded state
+   */
+  bool expanded_;
+
+  bool hide_titlebar_;
+
+  int highlighted_index_;
+
+  NodeViewCommon::FlowDirection flow_dir_;
+
+  QVector<NodeViewEdge*> edges_;
+
+};
+
+}
+
+#endif // NODEVIEWITEM_H