Added multiple selection feature to wxPropertyGrid (enabled by setting wxPG_EX_MULTIPLE_SELECTION style)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/propgrid/propgridiface.h

@@ -418,7 +418,20 @@ public:
     wxVariant GetPropertyValues( const wxString& listname = wxEmptyString,
                                  wxPGProperty* baseparent = NULL, long flags = 0 ) const;
 
-    /** Returns currently selected property. */
+    /**
+        Returns list of currently selected properties.
+
+        @remarks wxArrayPGProperty should be compatible with std::vector API.
+    */
+    const wxArrayPGProperty& GetSelectedProperties() const;
+
+    /**
+        Returns currently selected property. NULL if none.
+
+        @remarks When wxPG_EX_MULTIPLE_SELECTION extra style is used, this
+                 member function returns the focused property, that is the
+                 one which can have active editor.
+    */
     wxPGProperty* GetSelection() const;
 
     /**
@@ -538,6 +551,11 @@ public:
     */
     bool IsPropertyModified( wxPGPropArg id ) const;
 
+    /**
+        Returns true if property is selected.
+    */
+    virtual bool IsPropertySelected( wxPGPropArg id ) const;
+
     /**
         Returns @true if property is shown (ie. HideProperty() with @true not
         called for it).