wxDatePickerNoToday.cpp

#include <wx/wx.h>
#include <wx/datectrl.h>

#ifdef __WXMSW__
    #include <wx/msw/wrapcctl.h>
#endif;

// wxDatePickerNoToday is a wxDatePickerCtrl with wxDP_DROPDOWN style
// which on MSW does not display the today circle and today date
// in the drop down calendar
class wxDatePickerNoToday : public wxDatePickerCtrl
{
public:
    wxDatePickerNoToday(wxWindow *parent,
                        wxWindowID id,
                        const wxDateTime& date = wxDefaultDateTime,
                        const wxPoint& pos = wxDefaultPosition,
                        const wxSize& size = wxDefaultSize,
                        const wxValidator& validator = wxDefaultValidator,
                        const wxString& name = wxDatePickerCtrlNameStr)
        : wxDatePickerCtrl(parent, id, date, pos, size, wxDP_DROPDOWN, validator, name)
    {}

#ifdef __WXMSW__
    bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result) override
    {
        static const bool canSetMCSNoToday = wxApp::GetComCtl32Version() >= 570;

        if ( canSetMCSNoToday && LPNMHDR(lParam)->code == DTN_DROPDOWN )
        {
           const HWND hWndCalendar = DateTime_GetMonthCal(GetHWND());

            if ( hWndCalendar )
            {
                LONG style = ::GetWindowLong(hWndCalendar,  GWL_STYLE);

                if ( style != 0 )
                {
                    style |= MCS_NOTODAYCIRCLE | MCS_NOTODAY;
                    ::SetWindowLong(hWndCalendar, GWL_STYLE, style);
                }
            }
        }

        return wxDatePickerCtrl::MSWOnNotify(idCtrl, lParam, result);
    }
#endif
};

class MyDialog : public wxDialog
{
public:
    MyDialog() : wxDialog(nullptr, wxID_ANY, "Test")
    {
        wxBoxSizer* mainSizer = new wxBoxSizer(wxVERTICAL);
        wxDateTime dt(wxDateTime::Today());
        short day = dt.GetDay();

        if ( day == 1 )
            day++;
        else
            day--;
        dt.SetDay(day);

        // wxDatePickerNoToday: this one will not have today circle and today date in the drop down calendar
        mainSizer->Add(new wxDatePickerNoToday(this, wxID_ANY, dt), wxSizerFlags().Border());

        // regular wxDatePicker
        mainSizer->Add(new wxDatePickerCtrl(this, wxID_ANY, dt, wxDefaultPosition, wxDefaultSize, wxDP_DROPDOWN), wxSizerFlags().Border());

        SetSizerAndFit(mainSizer);
    }
};

class MyApp : public wxApp
{
public:
    bool OnInit() override
    {
        MyDialog().ShowModal();
        return false;
    }
}; wxIMPLEMENT_APP(MyApp);