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  ** Copyright (C) 2016 The Qt Company Ltd.
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  ** This file is part of the QtWidgets module of the Qt Toolkit.
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  #ifndef QCALENDARWIDGET_H
  #define QCALENDARWIDGET_H
  
  #include <QtWidgets/qtwidgetsglobal.h>
  #include <QtWidgets/qwidget.h>
  #include <QtCore/qdatetime.h>
  
  QT_REQUIRE_CONFIG(calendarwidget);
  
  QT_BEGIN_NAMESPACE
  
  class QDate;
  class QTextCharFormat;
  class QCalendarWidgetPrivate;
  
  class Q_WIDGETS_EXPORT QCalendarWidget : public QWidget
  {
      Q_OBJECT
      Q_ENUMS(Qt::DayOfWeek)
      Q_PROPERTY(QDate selectedDate READ selectedDate WRITE setSelectedDate)
      Q_PROPERTY(QDate minimumDate READ minimumDate WRITE setMinimumDate)
      Q_PROPERTY(QDate maximumDate READ maximumDate WRITE setMaximumDate)
      Q_PROPERTY(Qt::DayOfWeek firstDayOfWeek READ firstDayOfWeek WRITE setFirstDayOfWeek)
      Q_PROPERTY(bool gridVisible READ isGridVisible WRITE setGridVisible)
      Q_PROPERTY(SelectionMode selectionMode READ selectionMode WRITE setSelectionMode)
      Q_PROPERTY(HorizontalHeaderFormat horizontalHeaderFormat READ horizontalHeaderFormat WRITE setHorizontalHeaderFormat)
      Q_PROPERTY(VerticalHeaderFormat verticalHeaderFormat READ verticalHeaderFormat WRITE setVerticalHeaderFormat)
      Q_PROPERTY(bool navigationBarVisible READ isNavigationBarVisible WRITE setNavigationBarVisible)
      Q_PROPERTY(bool dateEditEnabled READ isDateEditEnabled WRITE setDateEditEnabled)
      Q_PROPERTY(int dateEditAcceptDelay READ dateEditAcceptDelay WRITE setDateEditAcceptDelay)
  
  public:
      enum HorizontalHeaderFormat {
          NoHorizontalHeader,
          SingleLetterDayNames,
          ShortDayNames,
          LongDayNames
      };
      Q_ENUM(HorizontalHeaderFormat)
  
      enum VerticalHeaderFormat {
          NoVerticalHeader,
          ISOWeekNumbers
      };
      Q_ENUM(VerticalHeaderFormat)
  
      enum SelectionMode {
          NoSelection,
          SingleSelection
      };
      Q_ENUM(SelectionMode)
  
      explicit QCalendarWidget(QWidget *parent = nullptr);
      ~QCalendarWidget();
  
      virtual QSize sizeHint() const override;
      virtual QSize minimumSizeHint() const override;
  
      QDate selectedDate() const;
  
      int yearShown() const;
      int monthShown() const;
  
      QDate minimumDate() const;
      void setMinimumDate(const QDate &date);
  
      QDate maximumDate() const;
      void setMaximumDate(const QDate &date);
  
      Qt::DayOfWeek firstDayOfWeek() const;
      void setFirstDayOfWeek(Qt::DayOfWeek dayOfWeek);
  
      bool isNavigationBarVisible() const;
      bool isGridVisible() const;
  
      SelectionMode selectionMode() const;
      void setSelectionMode(SelectionMode mode);
  
      HorizontalHeaderFormat horizontalHeaderFormat() const;
      void setHorizontalHeaderFormat(HorizontalHeaderFormat format);
  
      VerticalHeaderFormat verticalHeaderFormat() const;
      void setVerticalHeaderFormat(VerticalHeaderFormat format);
  
      QTextCharFormat headerTextFormat() const;
      void setHeaderTextFormat(const QTextCharFormat &format);
  
      QTextCharFormat weekdayTextFormat(Qt::DayOfWeek dayOfWeek) const;
      void setWeekdayTextFormat(Qt::DayOfWeek dayOfWeek, const QTextCharFormat &format);
  
      QMap<QDate, QTextCharFormat> dateTextFormat() const;
      QTextCharFormat dateTextFormat(const QDate &date) const;
      void setDateTextFormat(const QDate &date, const QTextCharFormat &format);
  
      bool isDateEditEnabled() const;
      void setDateEditEnabled(bool enable);
  
      int dateEditAcceptDelay() const;
      void setDateEditAcceptDelay(int delay);
  
  protected:
      bool event(QEvent *event) override;
      bool eventFilter(QObject *watched, QEvent *event) override;
      void mousePressEvent(QMouseEvent *event) override;
      void resizeEvent(QResizeEvent * event) override;
      void keyPressEvent(QKeyEvent * event) override;
  
      virtual void paintCell(QPainter *painter, const QRect &rect, const QDate &date) const;
      void updateCell(const QDate &date);
      void updateCells();
  
  public Q_SLOTS:
      void setSelectedDate(const QDate &date);
      void setDateRange(const QDate &min, const QDate &max);
      void setCurrentPage(int year, int month);
      void setGridVisible(bool show);
      void setNavigationBarVisible(bool visible);
      void showNextMonth();
      void showPreviousMonth();
      void showNextYear();
      void showPreviousYear();
      void showSelectedDate();
      void showToday();
  
  Q_SIGNALS:
      void selectionChanged();
      void clicked(const QDate &date);
      void activated(const QDate &date);
      void currentPageChanged(int year, int month);
  
  private:
      Q_DECLARE_PRIVATE(QCalendarWidget)
      Q_DISABLE_COPY(QCalendarWidget)
  
      Q_PRIVATE_SLOT(d_func(), void _q_slotShowDate(const QDate &date))
      Q_PRIVATE_SLOT(d_func(), void _q_slotChangeDate(const QDate &date))
      Q_PRIVATE_SLOT(d_func(), void _q_slotChangeDate(const QDate &date, bool changeMonth))
      Q_PRIVATE_SLOT(d_func(), void _q_editingFinished())
      Q_PRIVATE_SLOT(d_func(), void _q_prevMonthClicked())
      Q_PRIVATE_SLOT(d_func(), void _q_nextMonthClicked())
      Q_PRIVATE_SLOT(d_func(), void _q_yearEditingFinished())
      Q_PRIVATE_SLOT(d_func(), void _q_yearClicked())
      Q_PRIVATE_SLOT(d_func(), void _q_monthChanged(QAction *act))
  
  };
  
  QT_END_NAMESPACE
  
  #endif // QCALENDARWIDGET_H
  