network_canvas.hpp

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#pragma once
 
#include <QGraphicsView>
#include <QHash>
#include <QSet>
#include <QString>
 
#include <functional>
 
class Document;
class ClusterItem;
class NodeItem;
class LinkItem;
class ClusterLinkItem;
class QToolButton;
class QGraphicsProxyWidget;
class QGraphicsItem;
class QKeyEvent;
 
class NetworkCanvas : public QGraphicsView {
  Q_OBJECT
public:
  explicit NetworkCanvas(Document* doc, QWidget* parent = nullptr);
  ~NetworkCanvas() override;
 
  void rebuild();
  void persistLayout();
  void organizeClusters();
  void setConnectMode(bool on);
  [[nodiscard]] bool connectMode() const { return connectMode_; }
  void select(const QString& cluster, const QString& node);
 
signals:
  void nodeActivated(const QString& name);
  void selectionChanged(const QString& cluster, const QString& node);
  void connectModeChanged(bool on);
 
protected:
  void contextMenuEvent(QContextMenuEvent* event) override;
  void mousePressEvent(QMouseEvent* event) override;
  void keyPressEvent(QKeyEvent* event) override;
  void resizeEvent(QResizeEvent* event) override;
 
private:
  void updateLinks();
  void applyLinkVisibility();
  void positionAddClusterButton();
  void fitClustersInView();
  void promptAddCluster();
  void promptAddNode(const QString& clusterName);
  [[nodiscard]] QString uniqueClusterName() const;
  [[nodiscard]] QString uniqueNodeName() const;
  [[nodiscard]] bool isNodeNameAvailable(const QString& name,
                                         const QString& exceptName = {}) const;
  [[nodiscard]] bool isClusterNameAvailable(const QString& name,
                                            const QString& exceptName = {}) const;
  void startInlineRenameCluster(const QString& cluster,
                                const QString& editText = {});
  void startInlineRenameNode(const QString& node, const QString& editText = {});
  void beginInlineRename(QGraphicsItem* parentItem,
                         const QRectF& localRect,
                         const QString& oldName,
                         std::function<void()> onShow,
                         std::function<void()> onHide,
                         std::function<void(const QString&)> onCommit,
                         const QString& editText = {});
  void finishInlineRename(bool accept, bool viaEnter);
  void cancelInlineRename();
 
  [[nodiscard]] NodeItem* nodeItemAt(const QPoint& viewPos) const;
  [[nodiscard]] ClusterItem* clusterItemAt(const QPoint& viewPos) const;
 
  void clearConnectionSources();
  void setSoleConnectionSource(const QString& node);
  void toggleConnectionSource(const QString& node);
  void setConnectionSourcesFromCluster(ClusterItem* cluster, bool unionWith);
  void refreshConnectionVisuals();
  void syncDocumentSelectionFromSources();
  void batchToggleToDestinations(const QList<QString>& dests);
  void handleConnectionLeftClick(QMouseEvent* event);
  void handleConnectionRightClick(QMouseEvent* event);
 
  Document* doc_ = nullptr;
  QGraphicsScene* scene_ = nullptr;
  QToolButton* addClusterBtn_ = nullptr;
  QHash<QString, ClusterItem*> clusters_;
  QHash<QString, NodeItem*> nodes_;
  QList<LinkItem*> links_;
  QList<ClusterLinkItem*> clusterLinks_;
  bool connectMode_ = false;
  bool rebuilding_ = false;
  QSet<QString> connectionSources_;
  QString connectionPrimary_;
  QGraphicsProxyWidget* renameProxy_ = nullptr;
  std::function<void()> renameHideCb_;
  std::function<void(const QString&)> renameOnCommit_;
  QString renameOldName_;
  QString nodeCreateChainCluster_;
  bool renameClosing_ = false;
  bool renameDeferReturnPressed_ = false;
  bool renameReturnWired_ = false;
  bool renameAbortRemovesNode_ = false;
  bool renameIsNode_ = true;
};