/////////////////////////////////////////////////////////////////////////////
// Name:        datectrl.h
// Purpose:     interface of wxDatePickerCtrl
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

/**
    @class wxDatePickerCtrl
    @wxheader{datectrl.h}

    This control allows the user to select a date. Unlike
    wxCalendarCtrl, which is a relatively big control,
    wxDatePickerCtrl is implemented as a small window showing the currently
    selected date.
    The control can be edited using the keyboard, and can also display a popup
    window for more user-friendly date selection, depending on the styles used and
    the platform, except PalmOS where date is selected using native dialog.

    It is only available if @c wxUSE_DATEPICKCTRL is set to 1.

    @beginStyleTable
    @style{wxDP_SPIN}
           Creates a control without a month calendar drop down but with
           spin-control-like arrows to change individual date components. This
           style is not supported by the generic version.
    @style{wxDP_DROPDOWN}
           Creates a control with a month calendar drop-down part from which
           the user can select a date.
    @style{wxDP_DEFAULT}
           Creates a control with the style that is best supported for the
           current platform (currently wxDP_SPIN under Windows and
           wxDP_DROPDOWN elsewhere).
    @style{wxDP_ALLOWNONE}
           With this style, the control allows the user to not enter any valid
           date at all. Without it - the default - the control always has some
           valid date.
    @style{wxDP_SHOWCENTURY}
           Forces display of the century in the default date format. Without
           this style the century could be displayed, or not, depending on the
           default date representation in the system.
    @endStyleTable

    @beginEventTable{wxDateEvent}
    @event{EVT_DATE_CHANGED(id, func)}
           This event fires when the user changes the current selection in the control.
    @endEventTable

    @library{wxadv}
    @category{pickers}
    @appearance{datepickerctrl.png}

    @see wxCalendarCtrl, wxDateEvent
*/
class wxDatePickerCtrl : public wxControl
{
public:
    /**
        Initializes the object and calls Create() with
        all the parameters.
    */
    wxDatePickerCtrl(wxWindow* parent, wxWindowID id,
                     const wxDateTime& dt = wxDefaultDateTime,
                     const wxPoint& pos = wxDefaultPosition,
                     const wxSize& size = wxDefaultSize,
                     long style = wxDP_DEFAULT | wxDP_SHOWCENTURY,
                     const wxValidator& validator = wxDefaultValidator,
                     const wxString& name = "datectrl");

    /**
        @param parent
            Parent window, must not be non-@NULL.
        @param id
            The identifier for the control.
        @param dt
            The initial value of the control, if an invalid date (such as the
            default value) is used, the control is set to today.
        @param pos
            Initial position.
        @param size
            Initial size. If left at default value, the control chooses its
            own best size by using the height approximately equal to a text control and
            width large enough to show the date string fully.
        @param style
            The window style, should be left at 0 as there are no
            special styles for this control in this version.
        @param validator
            Validator which can be used for additional date checks.
        @param name
            Control name.

        @returns @true if the control was successfully created or @false if
                 creation failed.
    */
    bool Create(wxWindow* parent, wxWindowID id,
                const wxDateTime& dt = wxDefaultDateTime,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize,
                long style = wxDP_DEFAULT | wxDP_SHOWCENTURY,
                const wxValidator& validator = wxDefaultValidator,
                const wxString& name = "datectrl");

    /**
        If the control had been previously limited to a range of dates using
        SetRange(), returns the lower and upper
        bounds of this range. If no range is set (or only one of the bounds is set),
         @a dt1 and/or @a dt2 are set to be invalid.

        @param dt1
            Pointer to the object which receives the lower range limit or
            becomes invalid if it is not set. May be @NULL if the caller is not
            interested in lower limit
        @param dt2
            Same as above but for the upper limit

        @returns @false if no range limits are currently set, @true if at least one
                 bound is set.
    */
    bool GetRange(wxDateTime* dt1, wxDateTime dt2) const;

    /**
        Returns the currently selected. If there is no selection or the selection is
        outside of the current range, an invalid object is returned.
    */
    wxDateTime GetValue() const;

    /**
        Please note that this function is only available in the generic version of this
        control. The native version always uses the current system locale.
        Sets the display format for the date in the control. See wxDateTime for the
        meaning of format strings.

        @remarks If the format parameter is invalid, the behaviour is undefined.
    */
    void SetFormat(const wxChar* format);

    /**
        Sets the valid range for the date selection. If @a dt1 is valid, it becomes
        the earliest date (inclusive) accepted by the control. If @a dt2 is valid,
        it becomes the latest possible date.

        @remarks If the current value of the control is outside of the newly set
                 range bounds, the behaviour is undefined.
    */
    void SetRange(const wxDateTime& dt1, const wxDateTime& dt2);

    /**
        Changes the current value of the control. The date should be valid and included
        in the currently selected range, if any.
        Calling this method does not result in a date change event.
    */
    void SetValue(const wxDateTime& dt);
};