Add wxRendererNative::DrawGauge() method.

Add the method with the native implementations for MSW and OS X and a generic
version fallback.

Closes #16406.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77023 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/renderer.h

@@ -321,6 +321,13 @@ public:
                                     int flags = 0) = 0;
 #endif // wxHAS_DRAW_TITLE_BAR_BITMAP
 
+    // Draw a gauge with native style like a wxGauge would display
+    virtual void DrawGauge(wxWindow* win,
+                           wxDC& dc,
+                           const wxRect& rect,
+                           int value,
+                           int max,
+                           int flags = 0) = 0;
 
     // geometry functions
     // ------------------
@@ -500,6 +507,14 @@ public:
         { m_rendererNative.DrawTitleBarBitmap(win, dc, rect, button, flags); }
 #endif // wxHAS_DRAW_TITLE_BAR_BITMAP
 
+    virtual void DrawGauge(wxWindow* win,
+                           wxDC& dc,
+                           const wxRect& rect,
+                           int value,
+                           int max,
+                           int flags = 0)
+        { m_rendererNative.DrawGauge(win, dc, rect, value, max, flags); }
+
     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win)
         { return m_rendererNative.GetSplitterParams(win); }