Continues migration with DDS, Common

Lts/Common/LtsTimeline/timeline_view_drag_handler.h

@@ -0,0 +1,82 @@
+#pragma once
+
+#include "timeline_view.h"
+
+#include <LtsTimeline/ltstimeline_export.h>
+
+#include <QPoint>
+#include <QVector>
+#include <QModelIndex>
+
+
+class QDragEnterEvent;
+class QDragMoveEvent;
+class QDragLeaveEvent;
+class QDropEvent;
+class QMouseEvent;
+class QKeyEvent;
+
+
+namespace LtsTimeline
+{
+
+class Item;
+class Track;
+class TimelineView;
+class ItemDelegate;
+
+
+class LTSTIMELINE_EXPORT TimelineViewDragHandler
+{
+  friend class TimelineView;
+  friend class ItemDelegate;
+
+public:
+  explicit TimelineViewDragHandler(TimelineView *view);
+  virtual ~TimelineViewDragHandler();
+
+  virtual void dragEnterEvent(QDragEnterEvent *e);
+  virtual void dragMoveEvent(QDragMoveEvent *e);
+  virtual void dragLeaveEvent(QDragLeaveEvent *e);
+  virtual void dropEvent(QDropEvent *e);
+  virtual void mouseMoveEvent(QMouseEvent *e);
+  virtual void mousePressEvent(QMouseEvent *e);
+  virtual void mouseReleaseEvent(QMouseEvent *e);
+  virtual void keyPressEvent(QKeyEvent *e);
+
+  virtual bool isActive() const;
+
+  virtual int deltaX() const;
+  virtual int deltaY() const;
+  virtual qint64 deltaTime() const;
+
+  
+  const QVector<int> &dragItemIds() const { return m_dragItemIds; }
+  const QModelIndex &dragStartIndex() const { return m_dragStartIndex; }
+  qint64 dragStartTime() const { return m_dragStartTime; }
+  const QPoint &dragStartPos() const { return m_dragStartPos; }
+  const QPoint &dragPos() const { return m_dragPos; }
+
+protected:
+  virtual bool canDragItemsTo(const QPoint &point) const;
+  virtual bool canMoveItemsTo(const QPoint &point) const;
+
+  virtual void moveItemsLeft(const QVector<int> &itemIds, int dt);
+  virtual void moveItemsRight(const QVector<int> &itemIds, int dt);
+
+  int dragItemTrackId(const Item &item) const;
+  void clear();
+
+protected:
+  TimelineView *m_view{nullptr};
+  QVector<int> m_dragItemIds;
+  QModelIndex m_dragStartIndex;
+  qint64 m_dragStartTime{-1};
+  QPoint m_dragStartPos;
+  QPoint m_dragPos;
+
+  int m_snapLinePos{-1};
+
+};
+
+}