Support using GetTextExtent() with empty string to get descent in wxOSX.

[wxWidgets.git] / include / wx / dcsvg.h

diff --git a/include/wx/dcsvg.h b/include/wx/dcsvg.h
index 92acc4cdd6701524b489d1db49e434fc89fe7750..ee99a8e703cd4140b367142805b20a693241597b 100644 (file)
--- a/include/wx/dcsvg.h
+++ b/include/wx/dcsvg.h
@@ -15,6 +15,8 @@
 #include "wx/string.h"
 #include "wx/dc.h"
 
+#if wxUSE_SVG
+
 #define wxSVGVersion wxT("v0100")
 
 #ifdef __BORLANDC__
@@ -24,14 +26,19 @@
 
 class WXDLLIMPEXP_FWD_BASE wxFileOutputStream;
 
-class WXDLLIMPEXP_CORE wxSVGFileDC : public wxDC
+
+
+class WXDLLIMPEXP_FWD_CORE wxSVGFileDC;
+
+class WXDLLIMPEXP_CORE wxSVGFileDCImpl : public wxDCImpl
 {
 public:
-    wxSVGFileDC (wxString f);
-    wxSVGFileDC (wxString f, int Width, int Height);
-    wxSVGFileDC (wxString f, int Width, int Height, float dpi);
+    wxSVGFileDCImpl( wxSVGFileDC *owner, const wxString &filename,
+                     int width=320, int height=240, double dpi=72.0 );
+
+    virtual ~wxSVGFileDCImpl();
 
-    virtual ~wxSVGFileDC();
+    bool IsOk() const { return m_OK; }
 
     virtual bool CanDrawBitmap() const { return true; }
     virtual bool CanGetTextExtent() const { return true; }
@@ -47,10 +54,7 @@ public:
         wxFAIL_MSG(wxT("wxSVGFILEDC::Clear() Call not implemented \nNot sensible for an output file?"));
     }
 
-    virtual void DestroyClippingRegion()
-    {
-        wxFAIL_MSG(wxT("wxSVGFILEDC::void Call not yet implemented"));
-    }
+    virtual void DestroyClippingRegion();
 
     virtual wxCoord GetCharHeight() const;
     virtual wxCoord GetCharWidth() const;
@@ -72,15 +76,15 @@ public:
         wxFAIL_MSG(wxT("wxSVGFILEDC::GetClippingBox not implemented"));
     }
 
-    virtual void SetLogicalFunction(int WXUNUSED(function))
+    virtual void SetLogicalFunction(wxRasterOperationMode WXUNUSED(function))
     {
         wxFAIL_MSG(wxT("wxSVGFILEDC::SetLogicalFunction Call not implemented"));
     }
 
-    virtual int GetLogicalFunction() const
+    virtual wxRasterOperationMode GetLogicalFunction() const
     {
         wxFAIL_MSG(wxT("wxSVGFILEDC::GetLogicalFunction() not implemented"));
-        return -1;
+        return wxCOPY;
     }
 
     virtual void SetBackground( const wxBrush &brush );
@@ -89,14 +93,7 @@ public:
     virtual void SetFont(const wxFont& font);
     virtual void SetPen(const wxPen& pen);
 
-    virtual bool IsOk() const {return m_OK;}
-
-    virtual void SetMapMode( int mode );
-    virtual void SetUserScale( double x, double y );
-    virtual void SetLogicalScale( double x, double y );
-    virtual void SetLogicalOrigin( wxCoord x, wxCoord y );
-    virtual void SetDeviceOrigin( wxCoord x, wxCoord y );
-    virtual void SetAxisOrientation( bool xLeftRight, bool yBottomUp );
+    virtual void* GetHandle() const { return NULL; }
 
 private:
    virtual bool DoGetPixel(wxCoord, wxCoord, wxColour *) const
@@ -106,7 +103,7 @@ private:
    }
 
    virtual bool DoBlit(wxCoord, wxCoord, wxCoord, wxCoord, wxDC *,
-                       wxCoord, wxCoord, int = wxCOPY,
+                       wxCoord, wxCoord, wxRasterOperationMode = wxCOPY,
                        bool = 0, int = -1, int = -1);
 
    virtual void DoCrossHair(wxCoord, wxCoord)
@@ -116,7 +113,7 @@ private:
 
    virtual void DoDrawArc(wxCoord, wxCoord, wxCoord, wxCoord, wxCoord, wxCoord);
 
-   virtual void DoDrawBitmap(const wxBitmap &, wxCoord, wxCoord, bool = 0);
+   virtual void DoDrawBitmap(const wxBitmap &, wxCoord, wxCoord, bool = false);
 
    virtual void DoDrawCheckMark(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
 
@@ -129,12 +126,14 @@ private:
 
    virtual void DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
 
-   virtual void DoDrawLines(int n, wxPoint points[],
+   virtual void DoDrawLines(int n, const wxPoint points[],
                             wxCoord xoffset = 0, wxCoord yoffset = 0);
 
    virtual void DoDrawPoint(wxCoord, wxCoord);
 
-   virtual void DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle);
+   virtual void DoDrawPolygon(int n, const wxPoint points[],
+                              wxCoord xoffset, wxCoord yoffset,
+                              wxPolygonFillMode fillStyle);
 
    virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h);
 
@@ -149,7 +148,7 @@ private:
 
    virtual bool DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
                             const wxColour& WXUNUSED(col),
-                            int WXUNUSED(style) = wxFLOOD_SURFACE)
+                            wxFloodFillStyle WXUNUSED(style) = wxFLOOD_SURFACE)
    {
        wxFAIL_MSG(wxT("wxSVGFILEDC::DoFloodFill Call not implemented"));
        return false;
@@ -168,27 +167,62 @@ private:
                                 wxCoord *externalLeading = NULL,
                                 const wxFont *font = NULL) const;
 
-   virtual void DoSetClippingRegionAsRegion(const wxRegion& WXUNUSED(region))
+   virtual void DoSetDeviceClippingRegion(const wxRegion& WXUNUSED(region))
    {
-       wxFAIL_MSG(wxT("wxSVGFILEDC::DoSetClippingRegionAsRegion Call not yet implemented"));
+       wxFAIL_MSG(wxT("wxSVGFILEDC::DoSetDeviceClippingRegion not yet implemented"));
    }
 
-   void Init (wxString f, int Width, int Height, float dpi);
+   virtual void DoSetClippingRegion(int x,  int y, int width, int height);
 
-   void NewGraphics();
+   virtual void DoGetSizeMM( int *width, int *height ) const;
+
+   virtual wxSize GetPPI() const;
+
+   void Init (const wxString &filename, int width, int height, double dpi);
 
    void write( const wxString &s );
 
 private:
+   // If m_graphics_changed is true, close the current <g> element and start a
+   // new one for the last pen/brush change.
+   void NewGraphicsIfNeeded();
+
+   // Open a new graphics group setting up all the attributes according to
+   // their current values in wxDC.
+   void DoStartNewGraphics();
+
    wxFileOutputStream *m_outfile;
    wxString            m_filename;
    int                 m_sub_images; // number of png format images we have
    bool                m_OK;
-   bool                m_graphics_changed;
+   bool                m_graphics_changed;  // set by Set{Brush,Pen}()
    int                 m_width, m_height;
+   double              m_dpi;
 
-private:
-   DECLARE_ABSTRACT_CLASS(wxSVGFileDC)
+   // The clipping nesting level is incremented by every call to
+   // SetClippingRegion() and reset when DestroyClippingRegion() is called.
+   size_t m_clipNestingLevel;
+
+   // Unique ID for every clipping graphics group: this is simply always
+   // incremented in each SetClippingRegion() call.
+   size_t m_clipUniqueId;
+
+   DECLARE_ABSTRACT_CLASS(wxSVGFileDCImpl)
 };
 
+
+class WXDLLIMPEXP_CORE wxSVGFileDC : public wxDC
+{
+public:
+    wxSVGFileDC(const wxString& filename,
+                int width = 320,
+                int height = 240,
+                double dpi = 72.0)
+        : wxDC(new wxSVGFileDCImpl(this, filename, width, height, dpi))
+    {
+    }
+};
+
+#endif // wxUSE_SVG
+
 #endif // _WX_DCSVG_H_