added wxRendererNative to be used by the generic controls for rendering platfomr-specific parts

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22151 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/renderg.cpp

@@ -0,0 +1,136 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        generic/renderg.cpp
+// Purpose:     generic implementation of wxRendererBase (for any platform)
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     20.07.2003
+// RCS-ID:      $Id$
+// Copyright:   (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
+// License:     wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include "wx/string.h"
+#endif //WX_PRECOMP
+
+#include "wx/renderer.h"
+
+// ----------------------------------------------------------------------------
+// wxRendererGeneric: our wxRendererBase implementation
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxRendererGeneric : public wxRendererBase
+{
+public:
+    // draw the header control button (used by wxListCtrl)
+    virtual void DrawHeaderButton(wxWindow *win,
+                                  wxDC& dc,
+                                  const wxRect& rect,
+                                  int flags = 0);
+
+    // draw the expanded/collapsed icon for a tree control item
+    virtual void DrawTreeItemButton(wxWindow *win,
+                                    wxDC& dc,
+                                    const wxRect& rect,
+                                    int flags = 0);
+};
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxRendererGeneric creation
+// ----------------------------------------------------------------------------
+
+/* static */
+wxRendererNative *wxRendererGeneric::GetGeneric()
+{
+    static wxRendererGeneric s_rendererGeneric;
+
+    return s_rendererGeneric;
+}
+
+// some platforms have their own renderers
+#if !defined(__WXMSW__) && !defined(__WXMAC__) && !defined(__WXGTK__)
+
+/* static */
+wxRendererNative& wxRendererGeneric::Get()
+{
+    return GetGeneric();
+}
+
+#endif // platforms using their own renderers
+
+// ----------------------------------------------------------------------------
+// wxRendererGeneric drawing functions
+// ----------------------------------------------------------------------------
+
+void
+wxRendererGeneric::DrawHeaderButton(wxWindow *win,
+                                    wxDC& dc,
+                                    const wxRect& rect,
+                                    int flags)
+{
+    const int m_corner = 1;
+
+    dc->SetBrush( *wxTRANSPARENT_BRUSH );
+
+    dc->SetPen( *wxBLACK_PEN );
+    dc->DrawLine( x+w-m_corner+1, y, x+w, y+h );  // right (outer)
+    dc->DrawRectangle( x, y+h, w+1, 1 );          // bottom (outer)
+
+    wxPen pen( wxSystemSettings::GetColour( wxSYS_COLOUR_BTNSHADOW ), 1, wxSOLID );
+
+    dc->SetPen( pen );
+    dc->DrawLine( x+w-m_corner, y, x+w-1, y+h );  // right (inner)
+    dc->DrawRectangle( x+1, y+h-1, w-2, 1 );      // bottom (inner)
+
+    dc->SetPen( *wxWHITE_PEN );
+    dc->DrawRectangle( x, y, w-m_corner+1, 1 );   // top (outer)
+    dc->DrawRectangle( x, y, 1, h );              // left (outer)
+    dc->DrawLine( x, y+h-1, x+1, y+h-1 );
+    dc->DrawLine( x+w-1, y, x+w-1, y+1 );
+}
+
+// draw the plus or minus sign
+void
+wxRendererGeneric::DrawTreeItemButton(wxWindow *win,
+                                      wxDC& dc,
+                                      const wxRect& rect,
+                                      int flags)
+{
+    // white background
+    dc.SetPen(*wxGREY_PEN);
+    dc.SetBrush(*wxWHITE_BRUSH);
+    dc.DrawRectangle(rect.Deflate(1, 2));
+
+    // black lines
+    const wxCoord xMiddle = rect.x + rect.width/2;
+    const wxCoord yMiddle = rect.y + rect.height/2;
+
+    dc.SetPen(*wxBLACK_PEN);
+    dc.DrawLine(xMiddle - 2, yMiddle, xMiddle + 3, yMiddle);
+    if ( !item->IsExpanded() )
+    {
+        // turn "-" into "+"
+        dc.DrawLine(xMiddle, yMiddle - 2, xMiddle, yMiddle + 3);
+    }
+}
+
+