small wxArtProvider API improvements: added HasNativeProvider() and renamed confusingly-named Insert() to PushBack()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55008 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/artprov.h

@@ -117,6 +117,8 @@ public:
     // Dtor removes the provider from providers stack if it's still on it
     virtual ~wxArtProvider();
 
+    // Does this platform implement native icons theme?
+    static bool HasNativeProvider();
 
     // Add new provider to the top of providers stack (i.e. the provider will
     // be queried first of all).
@@ -124,7 +126,12 @@ public:
 
     // Add new provider to the bottom of providers stack (i.e. the provider
     // will be queried as the last one).
-    static void Insert(wxArtProvider *provider);
+    static void PushBack(wxArtProvider *provider);
+
+#if WXWIN_COMPATIBILITY_2_8
+    // use PushBack(), it's the same thing
+    wxDEPRECATED( static void Insert(wxArtProvider *provider) );
+#endif
 
     // Remove latest added provider and delete it.
     static bool Pop();

interface/wx/artprov.h

@@ -218,10 +218,21 @@ public:
                                       const wxArtClient& client = wxART_OTHER);
 
     /**
-        Register new art provider and add it to the bottom of providers stack
+        Returns true if the platform uses native icons provider that should
-        (i.e. it will be queried as the last one).
+        take precedence over any customizations.
 
-        @see Push()
+        This is true for any platform that has user-customizable icon themes,
+        currently only wxGTK.
+
+        A typical use for this method is to decide whether a custom art provider
+        should be plugged in using Push() or PushBack().
+
+        @since 2.9.0
+     */
+    static bool HasNativeProvider();
+
+    /**
+        @deprecated Use PushBack() instead.
     */
     static void Insert(wxArtProvider* provider);
 
@@ -234,10 +245,21 @@ public:
         Register new art provider and add it to the top of providers stack
         (i.e. it will be queried as the first provider).
 
-        @see Insert()
+        @see PushBack()
     */
     static void Push(wxArtProvider* provider);
 
+    /**
+        Register new art provider and add it to the bottom of providers stack.
+        In other words, it will be queried as the last one, after all others,
+        including the default provider.
+
+        @see Push()
+
+        @since 2.9.0
+    */
+    static void PushBack(wxArtProvider* provider);
+
     /**
         Remove a provider from the stack if it is on it. The provider is not
         deleted, unlike when using Delete().

src/common/artprov.cpp

@@ -160,7 +160,7 @@ wxArtProvider::~wxArtProvider()
     sm_providers->Insert(provider);
 }
 
-/*static*/ void wxArtProvider::Insert(wxArtProvider *provider)
+/*static*/ void wxArtProvider::PushBack(wxArtProvider *provider)
 {
     CommonAddingProvider();
     sm_providers->Append(provider);
@@ -378,6 +378,16 @@ wxIcon wxArtProvider::GetMessageBoxIcon(int flags)
 #endif // GTK+ 2/else
 }
 
+/* static */
+bool wxArtProvider::HasNativeProvider()
+{
+#ifdef __WXGTK20__
+    return true;
+#else
+    return false;
+#endif
+}
+
 // ----------------------------------------------------------------------------
 // deprecated wxArtProvider methods
 // ----------------------------------------------------------------------------
@@ -408,6 +418,13 @@ wxIcon wxArtProvider::GetMessageBoxIcon(int flags)
 
 #endif // WXWIN_COMPATIBILITY_2_6
 
+#if WXWIN_COMPATIBILITY_2_8
+/* static */ void wxArtProvider::Insert(wxArtProvider *provider)
+{
+    PushBack(provider);
+}
+#endif // WXWIN_COMPATIBILITY_2_8
+
 // ============================================================================
 // wxArtProviderModule
 // ============================================================================