File indexing completed on 2024-04-28 04:20:56

 // SPDX-FileCopyrightText: 2003-2022 Jesper K. Pedersen <blackie@kde.org>
 // SPDX-FileCopyrightText: 2023 Johannes Zarl-Zierl <johannes@zarl-zierl.at>
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #ifndef DATEBARMOUSEHANDLER_H
 #define DATEBARMOUSEHANDLER_H
 
 #include <DB/ImageDate.h>
 
 #include <Utilities/FastDateTime.h>
 #include <QObject>
 
 namespace DB
 {
 class ImageDate;
 }
 
 class QTimer;
 namespace DateBar
 {
 class DateBarWidget;
 
 class MouseHandler : public QObject
 {
     Q_OBJECT
 public:
     explicit MouseHandler(DateBarWidget *dateBar);
     virtual void mousePressEvent(int x) = 0;
     virtual void mouseMoveEvent(int x) = 0;
     virtual void mouseReleaseEvent() {};
     void startAutoScroll();
     void endAutoScroll();
 
 protected Q_SLOTS:
     void autoScroll();
 
 protected:
     DateBarWidget *m_dateBar;
 
 private:
     QTimer *m_autoScrollTimer;
 };
 
 /**
  * @brief The FocusItemDragHandler class handles mouse events for the histogram part of the DateBar.
  * I.e. the user clicks on the histogram part of the DateBar to jump to the corresponding date/time.
  */
 class FocusItemDragHandler : public MouseHandler
 {
 public:
     explicit FocusItemDragHandler(DateBarWidget *dateBar);
     void mousePressEvent(int x) override;
     void mouseMoveEvent(int x) override;
 };
 
 /**
  * @brief The BarDragHandler class handles moving the DateBar histogram by dragging it.
  * If a time range selection was set (by the SelectionHandler) and the user clicks outside that range, the selection is cleared.
  */
 class BarDragHandler : public MouseHandler
 {
 public:
     explicit BarDragHandler(DateBarWidget *);
     void mousePressEvent(int x) override;
     void mouseMoveEvent(int x) override;
 
 private:
     int m_movementOffset;
 };
 
 /**
  * @brief The SelectionHandler class handles mouse events for the area below the DateBar histogram.
  * I.e. the user clicks somewhere in the area below the histogram part of the DateBar and selects a time range by dragging the mouse.
  * When the user releases the mouse button, the selection is updated to the selected area.
  */
 class SelectionHandler : public MouseHandler
 {
 public:
     explicit SelectionHandler(DateBarWidget *);
     void mousePressEvent(int x) override;
     void mouseMoveEvent(int x) override;
     void mouseReleaseEvent() override;
     Utilities::FastDateTime min() const;
     Utilities::FastDateTime max() const;
     DB::ImageDate dateRange() const;
     void clearSelection();
     bool hasSelection() const;
     /**
      * @brief setOrExtendSelection extends the selection to the given date.
      * If the SelectionHandler does not currently have a selection, it selects the unit corrensponding to the date.
      * @param date a valid FastDateTime
      */
     void setOrExtendSelection(const Utilities::FastDateTime &date);
 
 private:
     Utilities::FastDateTime m_start;
     Utilities::FastDateTime m_end;
 };
 }
 
 #endif /* DATEBARMOUSEHANDLER_H */
 
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