X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/75399efbb219f894ac5fa3198125de05a6193642..0ea48a1f23b2c9763778f60405f051cac8bf781b:/include/wx/date.h

diff --git a/include/wx/date.h b/include/wx/date.h
index 9f964d35fe..09e8e00c49 100644
--- a/include/wx/date.h
+++ b/include/wx/date.h
@@ -81,8 +81,8 @@ public:
     long operator-(const wxDate &dt) const
         { return GetJulianDate() - dt.GetJulianDate(); }
 
-    wxDate &operator+=(long i) { m_date += wxTimeSpan::Days(i); return *this; }
-    wxDate &operator-=(long i) { m_date -= wxTimeSpan::Days(i); return *this; }
+    wxDate &operator+=(long i) { m_date += wxTimeSpan::Days((int)i); return *this; }
+    wxDate &operator-=(long i) { m_date -= wxTimeSpan::Days((int)i); return *this; }
 
     wxDate &operator++() { return *this += 1; }
     wxDate &operator++(int) { return *this += 1; }
@@ -123,7 +123,7 @@ public:
     wxDate &Set(long lJulian)
         { m_date.Set((double)(lJulian + 0.5)); return (wxDate&)*this; }
     wxDate &Set(int nMonth, int nDay, int nYear)
-        { m_date.Set(nDay, (wxDateTime::Month)nMonth, nYear); return (wxDate&)*this; }
+        { m_date.Set(nDay, (wxDateTime::Month)nMonth, nYear); return *this; }
 
     // May also pass neg# to decrement
     wxDate &AddWeeks(int nCount = 1)
@@ -161,16 +161,16 @@ public:
     int GetMonth() const { return m_date.GetMonth() + 1; }
 
     // First Date Of Month
-    wxDate GetMonthStart() const { return(wxDate(GetMonth(), 1, GetYear())); }
+    wxDate GetMonthStart() const { return(wxDate(GetMonth()-1, 1, GetYear())); }
     // Last Date Of Month
-    wxDate GetMonthEnd() const { return wxDate(GetMonth()+1, 1, GetYear())-1; }
+    wxDate GetMonthEnd() const { return wxDate(GetMonth(), 1, GetYear())-1; }
 
     // eg. 1992
     int GetYear() const { return m_date.GetYear(); }
     // First Date Of Year
-    wxDate GetYearStart() const { return wxDate(1, 1, GetYear()); }
+    wxDate GetYearStart() const { return wxDate(0, 1, GetYear()); }
     // Last Date Of Year
-    wxDate GetYearEnd() const { return wxDate(1, 1, GetYear()+1) - 1; }
+    wxDate GetYearEnd() const { return wxDate(0, 1, GetYear()+1) - 1; }
 
     bool IsBetween(const wxDate& first, const wxDate& second) const
     {
@@ -179,11 +179,11 @@ public:
 
     wxDate Previous(int dayOfWeek) const
     {
+        wxDate prev = *this;
         int dow = GetDayOfWeek();
-        if ( dayOfWeek <= dow )
-            return *this - (dow - dayOfWeek);
-        else
-            return *this - 7 + (dayOfWeek - dow);
+        prev -= dayOfWeek > dow ? 7 - (dayOfWeek - dow) : dow - dayOfWeek;
+
+        return prev;
     }
 
     wxString FormatDate(int type = -1) const