164 lines
4.2 KiB
C++
164 lines
4.2 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 "nodeviewedge.h"
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#include "nodeviewitemwidgetproxy.h"
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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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/**
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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 noe
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*/
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Node* node();
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/**
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* @brief Get expanded state
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*/
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bool IsExpanded();
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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 Get the rectangle of a specific parameter connector
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*
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* Useful for drawing parameter connectors (white squares where the Node edges attach) or determining whether a click
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* or drag occurred within one.
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*
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* @param index
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*
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* Index of the parameter of this node (see NodeParam::index()).
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*/
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QRectF GetParameterConnectorRect(int index);
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QRectF GetParameterConnectorRect(NodeParam* index);
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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 void mouseDoubleClickEvent(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 Get the relative position to draw text for a parameter at a certain index
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*/
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QPointF GetParameterTextPoint(int index);
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/**
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* @brief Variable for the expand/collapse button rect (stored for clicking)
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*/
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QRectF expand_hitbox_;
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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 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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/**
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* @brief Rectangle of the Node's content (zero-size when collapsed, (rect() - title_bar_rect_) when expanded)
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*/
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QRectF content_rect_;
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/// Used to determine certain padding/margin variables for high DPI support
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QFont font;
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QFontMetrics font_metrics;
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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* drag_expanded_item_;
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/// Sizing variables to use when drawing
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int node_connector_size_;
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int node_text_padding_;
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int node_icon_padding_;
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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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/**
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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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};
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#endif // NODEVIEWITEM_H
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