Intergrate wxAppProgressIndicator into wxGuage.

Update the progress bar of taskbar button if wxGuage has wxGA_PROGRESS style.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77631 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/gauge.h

@@ -15,6 +15,10 @@
 
 extern WXDLLIMPEXP_DATA_CORE(const char) wxGaugeNameStr[];
 
+#if wxUSE_TASKBARBUTTON
+class WXDLLIMPEXP_FWD_CORE wxAppProgressIndicator;
+#endif
+
 // Group box
 class WXDLLIMPEXP_CORE wxGauge : public wxGaugeBase
 {
@@ -33,6 +37,10 @@ public:
         (void)Create(parent, id, range, pos, size, style, validator, name);
     }
 
+#if wxUSE_TASKBARBUTTON
+    virtual ~wxGauge();
+#endif
+
     bool Create(wxWindow *parent,
                 wxWindowID id,
                 int range,
@@ -69,6 +77,10 @@ private:
     void SetIndeterminateMode();
     void SetDeterminateMode();
 
+#if wxUSE_TASKBARBUTTON
+    wxAppProgressIndicator* m_appProgressIndicator;
+#endif
+
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGauge)
 };