preserve type when loaded image is rescaled, #11543

[wxWidgets.git] / src / msw / datectrl.cpp

diff --git a/src/msw/datectrl.cpp b/src/msw/datectrl.cpp
index 012de2fe24f754a13b188aa25f1298d0e3e7883e..9551d86b923403f4ed2ee8fb21b47cc243ae6424 100644 (file)
--- a/src/msw/datectrl.cpp
+++ b/src/msw/datectrl.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        msw/datectrl.cpp
+// Name:        src/msw/datectrl.cpp

 // Purpose:     wxDatePickerCtrl implementation
 // Author:      Vadim Zeitlin
 // Modified by:
 // Purpose:     wxDatePickerCtrl implementation
 // Author:      Vadim Zeitlin
 // Modified by:


@@ -23,51 +23,39 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

+#if wxUSE_DATEPICKCTRL
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

+    #include "wx/msw/wrapwin.h"
+    #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
+    #include "wx/app.h"
+    #include "wx/intl.h"
+    #include "wx/dcclient.h"
+    #include "wx/settings.h"
+    #include "wx/msw/private.h"

 #endif
 
 #endif
 

-#if wxUSE_DATEPICKCTRL
-

 #include "wx/datectrl.h"
 
 #include "wx/datectrl.h"
 

-#define _WX_DEFINE_DATE_EVENTS_
+#include "wx/msw/private/datecontrols.h"
+

 #include "wx/dateevt.h"
 
 #include "wx/dateevt.h"
 

-#include "wx/msw/wrapwin.h"
-#include "wx/msw/wrapcctl.h"
-#include "wx/msw/private.h"
+// apparently some versions of mingw define these macros erroneously
+#ifndef DateTime_GetSystemtime
+    #define DateTime_GetSystemtime DateTime_GetSystemTime
+#endif
+
+#ifndef DateTime_SetSystemtime
+    #define DateTime_SetSystemtime DateTime_SetSystemTime
+#endif
+
+IMPLEMENT_DYNAMIC_CLASS(wxDatePickerCtrl, wxControl)

 
 // ============================================================================
 // implementation
 // ============================================================================
 
 
 // ============================================================================
 // implementation
 // ============================================================================
 

-// ----------------------------------------------------------------------------
-// helpers for wxDateTime <-> SYSTEMTIME conversion
-// ----------------------------------------------------------------------------
-
-static inline void wxFromSystemTime(wxDateTime *dt, const SYSTEMTIME& st)
-{
-    dt->Set(st.wDay,
-            wx_static_cast(wxDateTime::Month, wxDateTime::Jan + st.wMonth - 1),
-            st.wYear,
-            0, 0, 0);
-}
-
-static inline void wxToSystemTime(SYSTEMTIME *st, const wxDateTime& dt)
-{
-    const wxDateTime::Tm tm(dt.GetTm());
-
-    st->wYear = tm.year;
-    st->wMonth = tm.mon - wxDateTime::Jan + 1;
-    st->wDay = tm.mday;
-
-    st->wDayOfWeek =
-    st->wHour =
-    st->wMinute =
-    st->wSecond =
-    st->wMilliseconds = 0;
-}
-

 // ----------------------------------------------------------------------------
 // wxDatePickerCtrl creation
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // wxDatePickerCtrl creation
 // ----------------------------------------------------------------------------


@@ -82,6 +70,9 @@ wxDatePickerCtrl::Create(wxWindow *parent,
                          const wxValidator& validator,
                          const wxString& name)
 {
                          const wxValidator& validator,
                          const wxString& name)
 {

+    if ( !wxMSWDateControls::CheckInitialization() )
+        return false;
+

     // use wxDP_SPIN if wxDP_DEFAULT (0) was given as style
     if ( !(style & wxDP_DROPDOWN) )
         style |= wxDP_SPIN;
     // use wxDP_SPIN if wxDP_DEFAULT (0) was given as style
     if ( !(style & wxDP_DROPDOWN) )
         style |= wxDP_SPIN;


@@ -91,11 +82,13 @@ wxDatePickerCtrl::Create(wxWindow *parent,
         return false;
 
     // create the native control
         return false;
 
     // create the native control

-    if ( !MSWCreateControl(DATETIMEPICK_CLASS, _T(""), pos, size) )
+    if ( !MSWCreateControl(DATETIMEPICK_CLASS, wxEmptyString, pos, size) )

         return false;
 
         return false;
 

-    if ( dt.IsValid() )
+    if ( dt.IsValid() || (style & wxDP_ALLOWNONE) )

         SetValue(dt);
         SetValue(dt);

+    else
+        SetValue(wxDateTime::Today());

 
     return true;
 }
 
     return true;
 }


@@ -104,11 +97,21 @@ WXDWORD wxDatePickerCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
     WXDWORD styleMSW = wxDatePickerCtrlBase::MSWGetStyle(style, exstyle);
 
 {
     WXDWORD styleMSW = wxDatePickerCtrlBase::MSWGetStyle(style, exstyle);
 

-    if ( style & wxDP_SPIN )
+    // although MSDN doesn't mention it, DTS_UPDOWN doesn't work with
+    // comctl32.dll 4.72
+    if ( wxApp::GetComCtl32Version() > 472 && (style & wxDP_SPIN) )

         styleMSW |= DTS_UPDOWN;
     //else: drop down by default
 
         styleMSW |= DTS_UPDOWN;
     //else: drop down by default
 

-    styleMSW |= DTS_SHORTDATEFORMAT;
+#ifdef DTS_SHORTDATECENTURYFORMAT
+    if ( style & wxDP_SHOWCENTURY )
+        styleMSW |= DTS_SHORTDATECENTURYFORMAT;
+    else
+#endif // DTS_SHORTDATECENTURYFORMAT
+        styleMSW |= DTS_SHORTDATEFORMAT;
+
+    if ( style & wxDP_ALLOWNONE )
+        styleMSW |= DTS_SHOWNONE;

 
     return styleMSW;
 }
 
     return styleMSW;
 }


@@ -121,9 +124,57 @@ WXDWORD wxDatePickerCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 
 wxSize wxDatePickerCtrl::DoGetBestSize() const
 {
 
 wxSize wxDatePickerCtrl::DoGetBestSize() const
 {

-    const int y = GetCharHeight();
+    wxClientDC dc(const_cast<wxDatePickerCtrl *>(this));
+
+    // we can't use FormatDate() here as the CRT doesn't always use the same
+    // format as the date picker control
+    wxString s;
+    for ( int len = 100; ; len *= 2 )
+    {
+        if ( ::GetDateFormat
+               (
+                    LOCALE_USER_DEFAULT,    // the control should use the same
+                    DATE_SHORTDATE,         // the format used by the control
+                    NULL,                   // use current date (we don't care)
+                    NULL,                   // no custom format
+                    wxStringBuffer(s, len), // output buffer
+                    len                     // and its length
+               ) )
+        {
+            // success
+            break;
+        }
+
+        const DWORD rc = ::GetLastError();
+        if ( rc != ERROR_INSUFFICIENT_BUFFER )
+        {
+            wxLogApiError(wxT("GetDateFormat"), rc);
+
+            // fall back on wxDateTime, what else to do?
+            s = wxDateTime::Today().FormatDate();
+            break;
+        }
+    }

 
 

-    return wxSize(DEFAULT_ITEM_WIDTH, EDIT_HEIGHT_FROM_CHAR_HEIGHT(y));
+    // the best size for the control is bigger than just the string
+    // representation of todays date because the control must accommodate any
+    // date and while the widths of all digits are usually about the same, the
+    // width of the month string varies a lot, so try to account for it
+    s += wxT("WW");
+
+    int x, y;
+    dc.GetTextExtent(s, &x, &y);
+
+    // account for the drop-down arrow or spin arrows
+    x += wxSystemSettings::GetMetric(wxSYS_HSCROLL_ARROW_X);
+
+    // and for the checkbox if we have it
+    if ( HasFlag(wxDP_ALLOWNONE) )
+        x += 3*GetCharWidth();
+
+    wxSize best(x, EDIT_HEIGHT_FROM_CHAR_HEIGHT(y));
+    CacheBestSize(best);
+    return best;

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -132,29 +183,42 @@ wxSize wxDatePickerCtrl::DoGetBestSize() const
 
 void wxDatePickerCtrl::SetValue(const wxDateTime& dt)
 {
 
 void wxDatePickerCtrl::SetValue(const wxDateTime& dt)
 {

-    // as we don't support DTS_SHOWNONE style so far, we don't allow setting
-    // the control to an invalid date, but this restriction may be lifted in
-    // the future
-    wxCHECK_RET( dt.IsValid(), _T("invalid date") );
+    wxCHECK_RET( dt.IsValid() || HasFlag(wxDP_ALLOWNONE),
+                    wxT("this control requires a valid date") );

 
     SYSTEMTIME st;
 
     SYSTEMTIME st;

-    wxToSystemTime(&st, dt);
-    if ( !DateTime_SetSystemtime(GetHwnd(), GDT_VALID, &st) )
+    if ( dt.IsValid() )
+        dt.GetAsMSWSysTime(&st);
+    if ( !DateTime_SetSystemtime(GetHwnd(),
+                                 dt.IsValid() ? GDT_VALID : GDT_NONE,
+                                 &st) )

     {
     {

-        wxLogDebug(_T("DateTime_SetSystemtime() failed"));
+        wxLogDebug(wxT("DateTime_SetSystemtime() failed"));

     }
     }

+
+    // we need to keep only the date part, times don't make sense for this
+    // control (in particular, comparisons with other dates would fail)
+    m_date = dt;
+    if ( m_date.IsValid() )
+        m_date.ResetTime();

 }
 
 wxDateTime wxDatePickerCtrl::GetValue() const
 {
 }
 
 wxDateTime wxDatePickerCtrl::GetValue() const
 {

+#if wxDEBUG_LEVEL

     wxDateTime dt;
     SYSTEMTIME st;
     if ( DateTime_GetSystemtime(GetHwnd(), &st) == GDT_VALID )
     {
     wxDateTime dt;
     SYSTEMTIME st;
     if ( DateTime_GetSystemtime(GetHwnd(), &st) == GDT_VALID )
     {

-        wxFromSystemTime(&dt, st);
+        dt.SetFromMSWSysTime(st);

     }
 
     }
 

-    return dt;
+    wxASSERT_MSG( m_date.IsValid() == dt.IsValid() &&
+                    (!dt.IsValid() || dt == m_date),
+                  wxT("bug in wxDatePickerCtrl: m_date not in sync") );
+#endif // wxDEBUG_LEVEL
+
+    return m_date;

 }
 
 void wxDatePickerCtrl::SetRange(const wxDateTime& dt1, const wxDateTime& dt2)
 }
 
 void wxDatePickerCtrl::SetRange(const wxDateTime& dt1, const wxDateTime& dt2)


@@ -164,19 +228,19 @@ void wxDatePickerCtrl::SetRange(const wxDateTime& dt1, const wxDateTime& dt2)
     DWORD flags = 0;
     if ( dt1.IsValid() )
     {
     DWORD flags = 0;
     if ( dt1.IsValid() )
     {

-        wxToSystemTime(&st[0], dt1);
+        dt1.GetAsMSWSysTime(st + 0);

         flags |= GDTR_MIN;
     }
 
     if ( dt2.IsValid() )
     {
         flags |= GDTR_MIN;
     }
 
     if ( dt2.IsValid() )
     {

-        wxToSystemTime(&st[1], dt2);
+        dt2.GetAsMSWSysTime(st + 1);

         flags |= GDTR_MAX;
     }
 
     if ( !DateTime_SetRange(GetHwnd(), flags, st) )
     {
         flags |= GDTR_MAX;
     }
 
     if ( !DateTime_SetRange(GetHwnd(), flags, st) )
     {

-        wxLogDebug(_T("DateTime_SetRange() failed"));
+        wxLogDebug(wxT("DateTime_SetRange() failed"));

     }
 }
 
     }
 }
 


@@ -188,7 +252,7 @@ bool wxDatePickerCtrl::GetRange(wxDateTime *dt1, wxDateTime *dt2) const
     if ( dt1 )
     {
         if ( flags & GDTR_MIN )
     if ( dt1 )
     {
         if ( flags & GDTR_MIN )

-            wxFromSystemTime(dt1, st[0]);
+            dt1->SetFromMSWSysTime(st[0]);

         else
             *dt1 = wxDefaultDateTime;
     }
         else
             *dt1 = wxDefaultDateTime;
     }


@@ -196,7 +260,7 @@ bool wxDatePickerCtrl::GetRange(wxDateTime *dt1, wxDateTime *dt2) const
     if ( dt2 )
     {
         if ( flags & GDTR_MAX )
     if ( dt2 )
     {
         if ( flags & GDTR_MAX )

-            wxFromSystemTime(dt2, st[1]);
+            dt2->SetFromMSWSysTime(st[1]);

         else
             *dt2 = wxDefaultDateTime;
     }
         else
             *dt2 = wxDefaultDateTime;
     }


@@ -215,21 +279,30 @@ wxDatePickerCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
     switch ( hdr->code )
     {
         case DTN_DATETIMECHANGE:
     switch ( hdr->code )
     {
         case DTN_DATETIMECHANGE:

+        {

             NMDATETIMECHANGE *dtch = (NMDATETIMECHANGE *)hdr;
             wxDateTime dt;
             if ( dtch->dwFlags == GDT_VALID )
             NMDATETIMECHANGE *dtch = (NMDATETIMECHANGE *)hdr;
             wxDateTime dt;
             if ( dtch->dwFlags == GDT_VALID )

-                wxFromSystemTime(&dt, dtch->st);
+                dt.SetFromMSWSysTime(dtch->st);

 
 

-            wxDateEvent event(this, dt, wxEVT_DATE_CHANGED);
-            if ( GetEventHandler()->ProcessEvent(event) )
+            // filter out duplicate DTN_DATETIMECHANGE events which the native
+            // control sends us when using wxDP_DROPDOWN style
+            if ( (m_date.IsValid() != dt.IsValid()) ||
+                    (m_date.IsValid() && dt != m_date) )

             {
             {

-                *result = 0;
-                return true;
+                m_date = dt;
+                wxDateEvent event(this, dt, wxEVT_DATE_CHANGED);
+                if ( HandleWindowEvent(event) )
+                {
+                    *result = 0;
+                    return true;
+                }

             }
             }

+            //else: both the old and new values are invalid, nothing changed
+        }

     }
 
     return wxDatePickerCtrlBase::MSWOnNotify(idCtrl, lParam, result);
 }
 
 #endif // wxUSE_DATEPICKCTRL
     }
 
     return wxDatePickerCtrlBase::MSWOnNotify(idCtrl, lParam, result);
 }
 
 #endif // wxUSE_DATEPICKCTRL

-