Continues migration with DDS, Common

Lts/Common/LtsTimeline/timeline_view_resize_handler.h

@@ -0,0 +1,42 @@
+#pragma once
+
+#include <LtsTimeline/ltstimeline_export.h>
+
+#include <QMouseEvent>
+
+
+namespace LtsTimeline
+{
+
+class Track;
+class TimelineView;
+
+
+class LTSTIMELINE_EXPORT TimelineViewResizeHandler
+{
+
+public:
+  enum class ResizePosition { eNone, eStart, eEnd };
+
+  explicit TimelineViewResizeHandler(TimelineView *view);
+  virtual ~TimelineViewResizeHandler();
+
+  virtual void mouseMoveEvent(QMouseEvent *e);
+  virtual void mousePressEvent(QMouseEvent *e);
+  virtual void mouseReleaseEvent(QMouseEvent *e);
+
+  virtual bool isActive() const { return m_currentTrackId != -1 && m_currentItemId != -1 && m_resizePos != ResizePosition::eNone; }
+
+private:
+  virtual qint64 localSnapTime(int pos) const;
+  virtual qint64 globalSnapTime(int pos) const;
+
+protected:
+  TimelineView *m_view{nullptr};
+  int m_currentTrackId{-1};
+  int m_currentItemId{-1};
+  ResizePosition m_resizePos{ResizePosition::eNone};
+
+};
+
+}