Don't create multiple parent-less top level frames in layout sample.

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

diff --git a/include/wx/dc.h b/include/wx/dc.h
index 1f1731d4a6eae8af3d5b7c0885afd1b7c9072b19..a957b28e780f556957126f9b08e1fafcb8c8aa4e 100644 (file)
--- a/include/wx/dc.h
+++ b/include/wx/dc.h
@@ -43,6 +43,10 @@ class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
 class WXDLLIMPEXP_FWD_CORE wxPrinterDC;
 class WXDLLIMPEXP_FWD_CORE wxPrintData;
 
+#if wxUSE_GRAPHICS_CONTEXT
+class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
+#endif
+
 //  Logical ops
 enum wxRasterOperationMode
 {
@@ -279,6 +283,8 @@ public:
         return NULL;
     }
 
+    virtual void* GetHandle() const { return NULL; }
+    
     // query dimension, colour deps, resolution
 
     virtual void DoGetSize(int *width, int *height) const = 0;
@@ -427,8 +433,12 @@ public:
 
     // clipping
 
+    // Note that this pure virtual method has an implementation that updates
+    // the values returned by DoGetClippingBox() and so can be called from the
+    // derived class overridden version if it makes sense (i.e. if the clipping
+    // box coordinates are not already updated in some other way).
     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
-                                     wxCoord width, wxCoord height) = 0;
+                                     wxCoord w, wxCoord h) = 0;
 
     // NB: this function works with device coordinates, not the logical ones!
     virtual void DoSetDeviceClippingRegion(const wxRegion& region) = 0;
@@ -471,7 +481,7 @@ public:
     }
 
     virtual void SetLogicalScale(double x, double y);
-    virtual void GetLogicalScale(double *x, double *y)
+    virtual void GetLogicalScale(double *x, double *y) const
     {
         if ( x ) *x = m_logicalScaleX;
         if ( y ) *y = m_logicalScaleY;
@@ -512,6 +522,19 @@ public:
     // this needs to overidden if the axis is inverted
     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
 
+#ifdef __WXMSW__
+    // Native Windows functions using the underlying HDC don't honour GDI+
+    // transformations which may be applied to it. Using this function we can
+    // transform the coordinates manually before passing them to such functions
+    // (as in e.g. wxRendererMSW code). It doesn't do anything if this is not a
+    // wxGCDC.
+    virtual wxRect MSWApplyGDIPlusTransform(const wxRect& r) const
+    {
+        return r;
+    }
+#endif // __WXMSW__
+
+
     // ---------------------------------------------------------
     // the actual drawing API
 
@@ -581,15 +604,15 @@ public:
         { return wxNullBitmap; }
 
 
-    virtual void DoDrawLines(int n, wxPoint points[],
+    virtual void DoDrawLines(int n, const wxPoint points[],
                              wxCoord xoffset, wxCoord yoffset ) = 0;
     virtual void DrawLines(const wxPointList *list,
                            wxCoord xoffset, wxCoord yoffset );
 
-    virtual void DoDrawPolygon(int n, wxPoint points[],
+    virtual void DoDrawPolygon(int n, const wxPoint points[],
                            wxCoord xoffset, wxCoord yoffset,
                            wxPolygonFillMode fillStyle = wxODDEVEN_RULE) = 0;
-    virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+    virtual void DoDrawPolyPolygon(int n, const int count[], const wxPoint points[],
                                wxCoord xoffset, wxCoord yoffset,
                                wxPolygonFillMode fillStyle);
     void DrawPolygon(const wxPointList *list,
@@ -601,7 +624,7 @@ public:
     void DrawSpline(wxCoord x1, wxCoord y1,
                             wxCoord x2, wxCoord y2,
                             wxCoord x3, wxCoord y3);
-    void DrawSpline(int n, wxPoint points[]);
+    void DrawSpline(int n, const wxPoint points[]);
     void DrawSpline(const wxPointList *points) { DoDrawSpline(points); }
 
     virtual void DoDrawSpline(const wxPointList *points);
@@ -627,6 +650,13 @@ public:
     virtual int GetResolution() const
         { return -1; }
 
+#if wxUSE_GRAPHICS_CONTEXT
+    virtual wxGraphicsContext* GetGraphicsContext() const
+        { return NULL; }
+    virtual void SetGraphicsContext( wxGraphicsContext* WXUNUSED(ctx) )
+        {}
+#endif
+
 private:
     wxDC       *m_owner;
 
@@ -763,6 +793,9 @@ public:
     wxWindow *GetWindow() const
         { return m_pimpl->GetWindow(); }
 
+    void *GetHandle() const
+        { return m_pimpl->GetHandle(); }
+
     bool IsOk() const
         { return m_pimpl && m_pimpl->IsOk(); }
 
@@ -996,7 +1029,7 @@ public:
 
     void SetLogicalScale(double x, double y)
         { m_pimpl->SetLogicalScale( x, y ); }
-    void GetLogicalScale(double *x, double *y)
+    void GetLogicalScale(double *x, double *y) const
         { m_pimpl->GetLogicalScale( x, y ); }
 
     void SetLogicalOrigin(wxCoord x, wxCoord y)
@@ -1106,7 +1139,7 @@ public:
     void DrawPoint(const wxPoint& pt)
         { m_pimpl->DoDrawPoint(pt.x, pt.y); }
 
-    void DrawLines(int n, wxPoint points[],
+    void DrawLines(int n, const wxPoint points[],
                    wxCoord xoffset = 0, wxCoord yoffset = 0)
         { m_pimpl->DoDrawLines(n, points, xoffset, yoffset); }
     void DrawLines(const wxPointList *list,
@@ -1117,7 +1150,7 @@ public:
                                  wxCoord xoffset = 0, wxCoord yoffset = 0) );
 #endif  // WXWIN_COMPATIBILITY_2_8
 
-    void DrawPolygon(int n, wxPoint points[],
+    void DrawPolygon(int n, const wxPoint points[],
                      wxCoord xoffset = 0, wxCoord yoffset = 0,
                      wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
         { m_pimpl->DoDrawPolygon(n, points, xoffset, yoffset, fillStyle); }
@@ -1125,7 +1158,7 @@ public:
                      wxCoord xoffset = 0, wxCoord yoffset = 0,
                      wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
         { m_pimpl->DrawPolygon( list, xoffset, yoffset, fillStyle ); }
-    void DrawPolyPolygon(int n, int count[], wxPoint points[],
+    void DrawPolyPolygon(int n, const int count[], const wxPoint points[],
                          wxCoord xoffset = 0, wxCoord yoffset = 0,
                          wxPolygonFillMode fillStyle = wxODDEVEN_RULE)
         { m_pimpl->DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle); }
@@ -1248,7 +1281,7 @@ public:
                     wxCoord x2, wxCoord y2,
                     wxCoord x3, wxCoord y3)
         { m_pimpl->DrawSpline(x1,y1,x2,y2,x3,y3); }
-    void DrawSpline(int n, wxPoint points[])
+    void DrawSpline(int n, const wxPoint points[])
         { m_pimpl->DrawSpline(n,points); }
     void DrawSpline(const wxPointList *points)
         { m_pimpl->DrawSpline(points); }
@@ -1316,6 +1349,17 @@ public:
     TempHDC GetTempHDC() { return TempHDC(*this); }
 #endif // __WXMSW__
 
+#if wxUSE_GRAPHICS_CONTEXT
+    virtual wxGraphicsContext* GetGraphicsContext() const
+    {
+        return m_pimpl->GetGraphicsContext();
+    }
+    virtual void SetGraphicsContext( wxGraphicsContext* ctx )
+    {
+        m_pimpl->SetGraphicsContext(ctx);
+    }
+#endif
+
 protected:
     // ctor takes ownership of the pointer
     wxDC(wxDCImpl *pimpl) : m_pimpl(pimpl) { }