Big wxDataViewCtrl renderer classes refactoring.

This commit adds no changes in functionality but paves way for the upcoming
improvements of wxDataViewCustomRenderer.

First, introduce wxDataViewCustomRendererBase class in order to allow
implementing behaviour common to custom renderers in all ports in this class
instead of triplicating it.

This required splitting monolithic dataview.h in more parts, now we have
wx/dvrenderer.h which defines wxDataViewRendererBase and the new
wxDataViewCustomRendererBase and includes wx/port/dvrenderer.h which define
wxDataViewRenderer and wx/port/dvrenderers.h which defines all the other
renderer classes.

Also bring renderers hierarchy in the generic version closer to other ports:
all standard renderer classes now inherit from wxDataViewRenderer and not
wxDataViewCustomRenderer in for consistency with the other ports.
wxDataViewRenderer itself still does derive from wxDataViewCustomRendererBase,
unlike elsewhere, but this is unavoidable considering that all generic
renderers are custom ones.

Finally do some cleanup in OS X part of the code: correct indentation,
spacing, comment style.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dvrenderer.h

@@ -0,0 +1,77 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/gtk/dvrenderer.h
+// Purpose:     wxDataViewRenderer for GTK wxDataViewCtrl implementation
+// Author:      Robert Roebling, Vadim Zeitlin
+// Created:     2009-11-07 (extracted from wx/gtk/dataview.h)
+// RCS-ID:      $Id: wxhead.h,v 1.11 2009-06-29 10:23:04 zeitlin Exp $
+// Copyright:   (c) 2006 Robert Roebling
+//              (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_GTK_DVRENDERER_H_
+#define _WX_GTK_DVRENDERER_H_
+
+typedef struct _GtkTreeViewColumn GtkTreeViewColumn;
+
+// ----------------------------------------------------------------------------
+// wxDataViewRenderer
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_ADV wxDataViewRenderer: public wxDataViewRendererBase
+{
+public:
+    wxDataViewRenderer( const wxString &varianttype,
+                        wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
+                        int align = wxDVR_DEFAULT_ALIGNMENT );
+
+    virtual void SetMode( wxDataViewCellMode mode );
+    virtual wxDataViewCellMode GetMode() const;
+
+    virtual void SetAlignment( int align );
+    virtual int GetAlignment() const;
+
+    virtual void EnableEllipsize(wxEllipsizeMode mode = wxELLIPSIZE_MIDDLE);
+    virtual wxEllipsizeMode GetEllipsizeMode() const;
+
+    // GTK-specific implementation
+    // ---------------------------
+
+    // pack the GTK cell renderers used by this renderer to the given column
+    //
+    // by default only a single m_renderer is used but some renderers use more
+    // than one GTK cell renderer
+    virtual void GtkPackIntoColumn(GtkTreeViewColumn *column);
+
+    // called when the cell value was edited by user with the new value
+    //
+    // it validates the new value and notifies the model about the change by
+    // calling GtkOnCellChanged() if it was accepted
+    void GtkOnTextEdited(const gchar *itempath, const wxString& value);
+
+    GtkCellRenderer* GetGtkHandle() { return m_renderer; }
+    void GtkInitHandlers();
+    void GtkUpdateAlignment();
+
+    bool GtkIsUsingDefaultAttrs() const { return m_usingDefaultAttrs; }
+    void GtkSetUsingDefaultAttrs(bool def) { m_usingDefaultAttrs = def; }
+
+protected:
+    virtual void GtkOnCellChanged(const wxVariant& value,
+                                  const wxDataViewItem& item,
+                                  unsigned col);
+
+
+    GtkCellRenderer   *m_renderer;
+    int                m_alignment;
+
+    // true if we hadn't changed any visual attributes or restored them since
+    // doing this
+    bool m_usingDefaultAttrs;
+
+protected:
+    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewRenderer)
+};
+
+#endif // _WX_GTK_DVRENDERER_H_
+