itsmattkc
e154b5d5d4
The first in many NodeView improvements. Up until now, nodes have been forcibly auto-arranged, which has worked as a reasonable stop-gap just so that all the nodes are visible during testing/development. However this does not make a good user experience. We move the auto-arrange code to a manual function that can be used when the user or program deems it necessary, and also abstract the node positions so that the view can ultimately determine the exact amount of spacing (useful for changing DPIs) or orientation, so users can direct the flow whichever way they want.
184 lines
4.3 KiB
C++
184 lines
4.3 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 NODEVIEWITEM_H
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#define NODEVIEWITEM_H
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#include <QFontMetrics>
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#include <QGraphicsRectItem>
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#include <QLinearGradient>
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#include <QUndoCommand>
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#include <QWidget>
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#include "node/node.h"
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#include "nodeviewcommon.h"
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#include "nodeviewedge.h"
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#include "nodeviewitemwidgetproxy.h"
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OLIVE_NAMESPACE_ENTER
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/**
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* @brief A visual widget representation of a Node object to be used in a NodeView
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*
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* This widget can be collapsed or expanded to show/hide the node's various parameters.
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*
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* To retrieve the NodeViewItem for a certain Node, use NodeView::NodeToUIObject().
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*/
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class NodeViewItem : public QGraphicsRectItem
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{
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public:
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NodeViewItem(QGraphicsItem* parent = nullptr);
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QPointF GetNodePosition() const;
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void SetNodePosition(const QPointF& pos);
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/**
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* @brief Set the Node to correspond to this widget
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*/
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void SetNode(Node* n);
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/**
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* @brief Get currently attached node
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*/
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Node* GetNode() const;
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/**
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* @brief Get expanded state
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*/
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bool IsExpanded() const;
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/**
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* @brief Set expanded state
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*/
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void SetExpanded(bool e);
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void ToggleExpanded();
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/**
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* @brief Returns GLOBAL point that edges should connect to for any NodeParam member of this object
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*/
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QPointF GetParamPoint(NodeParam* param) const;
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/**
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* @brief Sets the direction nodes are flowing
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*/
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void SetFlowDirection(NodeViewCommon::FlowDirection dir);
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static int DefaultTextPadding();
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static int DefaultItemHeight();
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static int DefaultItemWidth();
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static int DefaultItemBorder();
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qreal DefaultItemHorizontalPadding() const;
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qreal DefaultItemVerticalPadding() const;
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protected:
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virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = nullptr) override;
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virtual void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
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virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
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virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
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virtual QVariant itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value) override;
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private:
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/**
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* @brief Highlight an input (for instance when the user is dragging over it)
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*/
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void SetHighlightedIndex(int index);
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/**
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* @brief Returns local rect of a NodeInput in array node_inputs_[index]
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*/
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QRectF GetInputRect(int index) const;
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/**
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* @brief Returns local point that edges should connect to for a NodeInput in array node_inputs_[index]
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*/
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QPointF GetInputPoint(int index) const;
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/**
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* @brief Reference to attached Node
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*/
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Node* node_;
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/**
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* @brief Cached list of node inputs
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*/
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QList<NodeInput*> node_inputs_;
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/**
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* @brief A QWidget that can receive CSS properties that NodeViewItem can use
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*
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* \see NodeViewItemWidget
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*/
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NodeViewItemWidget css_proxy_;
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/**
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* @brief Rectangle of the Node's title bar (equal to rect() when collapsed)
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*/
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QRectF title_bar_rect_;
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/// Edge dragging variables
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NodeViewEdge* dragging_edge_;
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QPointF dragging_edge_start_;
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NodeParam* drag_src_param_;
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NodeParam* drag_dest_param_;
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NodeViewItem* drag_source_;
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NodeViewItem* cached_drop_item_;
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bool cached_drop_item_expanded_;
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/// Sizing variables to use when drawing
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int node_border_width_;
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/**
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* @brief Expanded state
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*/
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bool expanded_;
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/**
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* @brief Current click mode
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*
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* \see mousePressEvent()
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*/
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bool standard_click_;
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int highlighted_index_;
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/**
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* @brief QUndoCommand for creating and deleting edges by dragging
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*
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* \see mousePressEvent()
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* \see mouseReleaseEvent()
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*/
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QUndoCommand* node_edge_change_command_;
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NodeViewCommon::FlowDirection flow_dir_;
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};
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OLIVE_NAMESPACE_EXIT
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#endif // NODEVIEWITEM_H
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