Implement multiple selection support in wxOSX

Add support for wxDD_MULTIPLE style to wxDirDialog in wxOSX too.

include/wx/osx/dirdlg.h

@@ -47,6 +47,10 @@ public:
 
     virtual int ShowModal() wxOVERRIDE;
 
+    virtual wxString GetPath() const wxOVERRIDE;
+    virtual void GetPaths(wxArrayString& paths) const wxOVERRIDE;
+
+
 #if wxOSX_USE_COCOA
     virtual void ShowWindowModal() wxOVERRIDE;
     virtual void ModalFinishedCallback(void* panel, int returnCode) wxOVERRIDE;
@@ -64,6 +68,8 @@ private:
     // Common part of all ctors.
     void Init();
 
+    wxArrayString m_paths;
+
     wxDECLARE_DYNAMIC_CLASS(wxDirDialog);
 };
 

src/osx/cocoa/dirdlg.mm

@@ -48,6 +48,9 @@ void wxDirDialog::Create(wxWindow *parent, const wxString& message,
 {
     m_parent = parent;
 
+    wxASSERT_MSG( !( (style & wxDD_MULTIPLE) && (style & wxDD_CHANGE_DIR) ),
+                  "wxDD_CHANGE_DIR can't be used together with wxDD_MULTIPLE" );
+
     SetMessage( message );
     SetWindowStyle(style);
     SetPath(defaultPath);
@@ -73,6 +76,9 @@ WX_NSOpenPanel wxDirDialog::OSXCreatePanel() const
     if ( !HasFlag(wxDD_DIR_MUST_EXIST) )
         [oPanel setCanCreateDirectories:YES];
 
+    if ( HasFlag(wxDD_MULTIPLE) )
+        [oPanel setAllowsMultipleSelection:YES];
+
     if ( HasFlag(wxDD_SHOW_HIDDEN) )
         [oPanel setShowsHiddenFiles:YES];
 
@@ -142,8 +148,7 @@ void wxDirDialog::ModalFinishedCallback(void* panel, int returnCode)
 
         for ( NSURL* url in selectedURL )
         {
-            SetPath([url fileSystemRepresentation]);
-            break;
+            m_paths.Add([url fileSystemRepresentation]);
         }
 
         result = wxID_OK;
@@ -154,5 +159,16 @@ void wxDirDialog::ModalFinishedCallback(void* panel, int returnCode)
         SendWindowModalDialogEvent ( wxEVT_WINDOW_MODAL_DIALOG_CLOSED  );
 }
 
+wxString wxDirDialog::GetPath() const
+{
+    return m_paths.Last();
+}
+
+void wxDirDialog::GetPaths(wxArrayString& paths) const
+{
+    paths.Empty();
+    paths = m_paths;
+}
+
 
 #endif // wxUSE_DIRDLG