added wxCANCEL_DEFAULT style to wxMessageDialog (only implemented for MSW for now); also tightened up the style checks in wxMessageDialog::SetMessageDialogStyle()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55561 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -309,6 +309,7 @@ All (GUI):
 - Added wxWrapSizer (Arne Steinarson)
 - Added wxSpinCtrlDouble (John Labenski)
 - Support custom labels in wxMessageDialog (Gareth Simpson for wxMac version).
+- Also added wxCANCEL_DEFAULT to wxMessageDialog.
 - Allow copying text in the log dialogs.
 - Added multisample (anti-aliasing) support to wxGLCanvas (Olivier Playez).
 - Initialize wx{Client,Paint,Window}DC with fonts/colours of its window.

include/wx/msgdlg.h

@@ -143,9 +143,24 @@ public:
         wxASSERT_MSG( ((style & wxYES_NO) == wxYES_NO) || !(style & wxYES_NO),
                       "wxYES and wxNO may only be used together" );
 
+        wxASSERT_MSG( !(style & wxYES) || !(style & wxOK),
+                      "wxOK and wxYES/wxNO can't be used together" );
+
+        wxASSERT_MSG( (style & wxYES) || (style & wxOK),
+                      "one of wxOK and wxYES/wxNO must be used" );
+
         wxASSERT_MSG( (style & wxID_OK) != wxID_OK,
                       "wxMessageBox: Did you mean wxOK (and not wxID_OK)?" );
 
+        wxASSERT_MSG( !(style & wxNO_DEFAULT) || (style & wxNO),
+                      "wxNO_DEFAULT is invalid without wxNO" );
+
+        wxASSERT_MSG( !(style & wxCANCEL_DEFAULT) || (style & wxCANCEL),
+                      "wxCANCEL_DEFAULT is invalid without wxCANCEL" );
+
+        wxASSERT_MSG( !(style & wxCANCEL_DEFAULT) || !(style & wxNO_DEFAULT),
+                      "only one default button can be specified" );
+
         m_dialogStyle = style;
     }
 

interface/wx/msgdlg.h

@@ -39,9 +39,14 @@ public:
             @c wxCANCEL.
         @style{wxNO_DEFAULT}
             Makes the "No" button default, can only be used with @c wxYES_NO.
+        @style{wxCANCEL_DEFAULT}
+            Makes the "Cancel" button default, can only be used with @c wxCANCEL
         @style{wxYES_DEFAULT}
             Makes the "Yes" button default, this is the default behaviour and
             this flag exists solely for symmetry with @c wxNO_DEFAULT.
+        @style{wxOK_DEFAULT}
+            Makes the "OK" button default, this is the default behaviour and
+            this flag exists solely for symmetry with @c wxCANCEL_DEFAULT.
         @style{wxICON_EXCLAMATION}
             Displays an exclamation mark symbol.
         @style{wxICON_ERROR}
@@ -62,6 +67,11 @@ public:
             implemented only under MSW).
         @endStyleTable
 
+        Notice that not all styles are compatible: only one of @c wxOK and @c
+        wxYES_NO may be specified (and one of them must be specified) and at
+        most one default button style can be used and it is only valid if the
+        corresponding button is shown in the message box.
+
         @param parent
             Parent window.
         @param message
@@ -75,7 +85,7 @@ public:
     */
     wxMessageDialog(wxWindow* parent, const wxString& message,
                     const wxString& caption = "Message box",
-                    long style = wxOK | wxCANCEL,
+                    long style = wxOK | wxCENTRE,
                     const wxPoint& pos = wxDefaultPosition);
 
     /**

src/msw/msgdlg.cpp

@@ -446,7 +446,7 @@ int wxMessageDialog::ShowModal()
     HWND hWnd = m_parent ? GetHwndOf(m_parent) : NULL;
 
     // translate wx style in MSW
-    unsigned int msStyle = MB_OK;
+    unsigned int msStyle;
     const long wxStyle = GetMessageDialogStyle();
     if ( wxStyle & wxYES_NO )
     {
@@ -459,15 +459,24 @@ int wxMessageDialog::ShowModal()
 
         if ( wxStyle & wxNO_DEFAULT )
             msStyle |= MB_DEFBUTTON2;
+        else if ( wxStyle & wxCANCEL_DEFAULT )
+            msStyle |= MB_DEFBUTTON3;
     }
-
+    else // without Yes/No we're going to have an OK button
-    if (wxStyle & wxOK)
     {
         if ( wxStyle & wxCANCEL )
+        {
             msStyle = MB_OKCANCEL;
-        else
+
+            if ( wxStyle & wxCANCEL_DEFAULT )
+                msStyle |= MB_DEFBUTTON2;
+        }
+        else // just "OK"
+        {
             msStyle = MB_OK;
         }
+    }
+
     if (wxStyle & wxICON_EXCLAMATION)
         msStyle |= MB_ICONEXCLAMATION;
     else if (wxStyle & wxICON_HAND)