From 8a462d4ee12820a8ee404eef060e5cd406ba3f09 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 19 Nov 2004 17:17:00 +0000
Subject: [PATCH] added GetIfActive() method returning non-NULL engine only if
 themes are not only available, but really use

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30630 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/msw/uxtheme.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/wx/msw/uxtheme.h b/include/wx/msw/uxtheme.h
index 7d5548bff4..f7578a9746 100644
--- a/include/wx/msw/uxtheme.h
+++ b/include/wx/msw/uxtheme.h
@@ -261,6 +261,10 @@ public:
     // get the theme engine or NULL if themes are not available
     static wxUxThemeEngine *Get();
 
+    // get the theme enging or NULL if themes are not available or not used for
+    // this application
+    static wxUxThemeEngine *GetIfActive();
+
     // all uxtheme.dll functions
     wxUX_THEME_DECLARE(PFNWXUOPENTHEMEDATA, OpenThemeData)
     wxUX_THEME_DECLARE(PFNWXUCLOSETHEMEDATA, CloseThemeData)
@@ -343,6 +347,14 @@ private:
     DECLARE_NO_COPY_CLASS(wxUxThemeEngine)
 };
 
+/* static */ inline wxUxThemeEngine *wxUxThemeEngine::GetIfActive()
+{
+    wxUxThemeEngine *engine = Get();
+    return engine && engine->IsAppThemed() && engine->IsThemeActive()
+                ? engine
+                : NULL;
+}
+
 #if !wxUSE_UXTHEME
 
 /* static */ inline wxUxThemeEngine *wxUxThemeEngine::Get()
@@ -350,6 +362,11 @@ private:
     return NULL;
 }
 
+/* static */ inline wxUxThemeEngine *wxUxThemeEngine::GetIfActive()
+{
+    return NULL;
+}
+
 #endif // !wxUSE_UXTHEME
 
 // ----------------------------------------------------------------------------
-- 
2.45.2