X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7b0ccb8a603b4f97740acc65d9429bb58f7ba1bd..8a07956565ddccd1720abf4e510945593128d774:/src/gtk/calctrl.cpp

diff --git a/src/gtk/calctrl.cpp b/src/gtk/calctrl.cpp
index 313a3e3dc6..09104839e0 100644
--- a/src/gtk/calctrl.cpp
+++ b/src/gtk/calctrl.cpp
@@ -88,6 +88,7 @@ bool wxGtkCalendarCtrl::Create(wxWindow *parent,
     }
 
     m_widget = gtk_calendar_new();
+    g_object_ref(m_widget);
     SetDate(date.IsValid() ? date : wxDateTime::Today());
 
     if (style & wxCAL_NO_MONTH_CHANGE)
@@ -141,25 +142,42 @@ bool wxGtkCalendarCtrl::SetDate(const wxDateTime& date)
 {
     g_signal_handlers_block_by_func(m_widget,
         (gpointer) gtk_day_selected_callback, this);
-        
+    g_signal_handlers_block_by_func(m_widget,
+        (gpointer) gtk_month_changed_callback, this);
+
     m_selectedDate = date;
     int year = date.GetYear();
     int month = date.GetMonth();
     int day = date.GetDay();
     gtk_calendar_select_month(GTK_CALENDAR(m_widget), month, year);
     gtk_calendar_select_day(GTK_CALENDAR(m_widget), day);
-    
+
+    g_signal_handlers_unblock_by_func( m_widget,
+        (gpointer) gtk_month_changed_callback, this);
     g_signal_handlers_unblock_by_func( m_widget,
         (gpointer) gtk_day_selected_callback, this);
-    
+
     return true;
 }
 
 wxDateTime wxGtkCalendarCtrl::GetDate() const
 {
-    guint year, month, day;
-    gtk_calendar_get_date(GTK_CALENDAR(m_widget), &year, &month, &day);
-    return wxDateTime(day, (wxDateTime::Month) month, year);
+    guint year, monthGTK, day;
+    gtk_calendar_get_date(GTK_CALENDAR(m_widget), &year, &monthGTK, &day);
+
+    // GTK may return an invalid date, this happens at least when switching the
+    // month (or the year in case of February in a leap year) and the new month
+    // has fewer days than the currently selected one making the currently
+    // selected day invalid, e.g. just choosing May 31 and going back a month
+    // results in the date being (non existent) April 31 when we're called from
+    // gtk_prev_month_callback(). We need to manually work around this to avoid
+    // asserts from wxDateTime ctor.
+    const wxDateTime::Month month = static_cast<wxDateTime::Month>(monthGTK);
+    const guint dayMax = wxDateTime::GetNumberOfDays(month, year);
+    if ( day > dayMax )
+        day = dayMax;
+
+    return wxDateTime(day, month, year);
 }
 
 void wxGtkCalendarCtrl::Mark(size_t day, bool mark)
@@ -170,7 +188,4 @@ void wxGtkCalendarCtrl::Mark(size_t day, bool mark)
         gtk_calendar_unmark_day(GTK_CALENDAR(m_widget), day);
 }
 
-IMPLEMENT_DYNAMIC_CLASS(wxGtkCalendarCtrl, wxControl)
-
-
 #endif // wxUSE_CALENDARCTRL