X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..d38d271fa63aa59d8531710b4c143ecf33fbb819:/src/msw/textctrl.cpp

diff --git a/src/msw/textctrl.cpp b/src/msw/textctrl.cpp
index 82f29026b7..49e3c4ed43 100644
--- a/src/msw/textctrl.cpp
+++ b/src/msw/textctrl.cpp
@@ -378,29 +378,34 @@ wxString wxTextCtrl::GetValue() const
 #if wxUSE_RICHEDIT
     if ( m_isRich )
     {
-        int len = GetWindowTextLength(GetHwnd()) + 1;
-
         wxString str;
-        wxChar *p = str.GetWriteBuf(len);
 
-        TEXTRANGE textRange;
-        textRange.chrg.cpMin = 0;
-        textRange.chrg.cpMax = -1;
-        textRange.lpstrText = p;
+        int len = GetWindowTextLength(GetHwnd());
+        if ( len )
+        {
+            // alloc one extra WORD as needed by the control
+            wxChar *p = str.GetWriteBuf(++len);
 
-        (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
+            TEXTRANGE textRange;
+            textRange.chrg.cpMin = 0;
+            textRange.chrg.cpMax = -1;
+            textRange.lpstrText = p;
 
-        // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for the
-        // newlines which is neither Unix nor Windows style (Win95 with
-        // riched20.dll shows this behaviour) - convert it to something
-        // reasonable
-        for ( ; *p; p++ )
-        {
-            if ( *p == _T('\r') )
-                *p = _T('\n');
-        }
+            (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 
-        str.UngetWriteBuf();
+            // believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
+            // the newlines which is neither Unix nor Windows style (Win95 with
+            // riched20.dll shows this behaviour) - convert it to something
+            // reasonable
+            for ( ; *p; p++ )
+            {
+                if ( *p == _T('\r') )
+                    *p = _T('\n');
+            }
+
+            str.UngetWriteBuf();
+        }
+        //else: no text at all, leave the string empty
 
         return str;
     }
@@ -493,7 +498,7 @@ bool wxTextCtrl::CanCopy() const
     // Can copy if there's a selection
     long from, to;
     GetSelection(& from, & to);
-    return (from != to);
+    return (from != to) ;
 }
 
 bool wxTextCtrl::CanCut() const
@@ -501,7 +506,7 @@ bool wxTextCtrl::CanCut() const
     // Can cut if there's a selection
     long from, to;
     GetSelection(& from, & to);
-    return (from != to);
+    return (from != to) && (IsEditable());
 }
 
 bool wxTextCtrl::CanPaste() const
@@ -822,7 +827,7 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
     wxString str;
     wxChar *buf = str.GetWriteBuf(len);
 
-    *(WORD *)buf = len;
+    *(WORD *)buf = (WORD)len;
     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
     buf[len] = 0;
 
@@ -962,10 +967,10 @@ bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
     return TRUE;
 }
 
-WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
-                               WXUINT message,
-                               WXWPARAM wParam,
-                               WXLPARAM lParam)
+WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
+                               WXUINT WXUNUSED(message),
+                               WXWPARAM WXUNUSED(wParam),
+                               WXLPARAM WXUNUSED(lParam))
 {
 #if wxUSE_CTL3D
     if ( m_useCtl3D )
@@ -1074,7 +1079,7 @@ wxSize wxTextCtrl::DoGetBestSize() const
     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
     if ( m_windowStyle & wxTE_MULTILINE )
     {
-        hText *= wxMin(GetNumberOfLines(), 5);
+        hText *= wxMax(GetNumberOfLines(), 5);
     }
     //else: for single line control everything is ok