extract (and expand and clean up and document) the header window implementation used inside the generic wxDataViewCtrl in a separate wxHeaderCtrl class which could be reused in (generic) wxListCtrl and, most importantly, wxGrid later

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57093 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/headerctrl.h

@@ -0,0 +1,72 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/headerctrl.h
+// Purpose:     wxMSW native wxHeaderCtrl
+// Author:      Vadim Zeitlin
+// Created:     2008-12-01
+// RCS-ID:      $Id$
+// Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_HEADERCTRL_H_
+#define _WX_MSW_HEADERCTRL_H_
+
+class WXDLLIMPEXP_FWD_CORE wxImageList;
+
+// ----------------------------------------------------------------------------
+// wxHeaderCtrl
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_CORE wxHeaderCtrl : public wxHeaderCtrlBase
+{
+public:
+    wxHeaderCtrl()
+    {
+        Init();
+    }
+
+    wxHeaderCtrl(wxWindow *parent,
+                 wxWindowID id = wxID_ANY,
+                 const wxPoint& pos = wxDefaultPosition,
+                 const wxSize& size = wxDefaultSize,
+                 long style = wxHD_DEFAULT_STYLE,
+                 const wxString& name = wxHeaderCtrlNameStr)
+    {
+        Init();
+
+        Create(parent, id, pos, size, style, name);
+    }
+
+    bool Create(wxWindow *parent,
+                wxWindowID id = wxID_ANY,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxHD_DEFAULT_STYLE,
+                const wxString& name = wxHeaderCtrlNameStr);
+
+    virtual ~wxHeaderCtrl();
+
+private:
+    // implement base class pure virtuals
+    virtual unsigned int DoGetCount() const;
+    virtual void DoInsert(const wxHeaderColumn& col, unsigned int idx);
+    virtual void DoDelete(unsigned int idx);
+    virtual void DoShowSortIndicator(unsigned int idx, int sortOrder);
+
+    // override wxWindow methods which must be implemented by a new control
+    virtual wxSize DoGetBestSize() const;
+
+    // override MSW-specific methods needed for new control
+    virtual WXDWORD MSWGetStyle(long style, WXDWORD *exstyle) const;
+
+    // common part of all ctors
+    void Init();
+
+    // the image list: initially NULL, created on demand
+    wxImageList *m_imageList;
+
+    DECLARE_NO_COPY_CLASS(wxHeaderCtrl)
+};
+
+#endif // _WX_MSW_HEADERCTRL_H_
+