X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/793db75554d2d2bc5dc9b0fc42c0b7aa03a44183..498ace9e1f08b1e177b1a883ac69d12385e805b0:/include/wx/dc.h

diff --git a/include/wx/dc.h b/include/wx/dc.h
index 777ee31702..a846442f68 100644
--- a/include/wx/dc.h
+++ b/include/wx/dc.h
@@ -1,35 +1,34 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        dc.h
+// Name:        wx/dc.h
 // Purpose:     wxDC class
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     05/25/99
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWindows team
+// Copyright:   (c) wxWidgets team
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_DC_H_BASE_
 #define _WX_DC_H_BASE_
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma interface "dcbase.h"
-#endif
-
 // ----------------------------------------------------------------------------
 // headers which we must include here
 // ----------------------------------------------------------------------------
 
 #include "wx/object.h"          // the base class
 
+#include "wx/intl.h"            // for wxLayoutDirection
 #include "wx/cursor.h"          // we have member variables of these classes
 #include "wx/font.h"            // so we can't do without them
 #include "wx/colour.h"
+#include "wx/bitmap.h"          // for wxNullBitmap
 #include "wx/brush.h"
 #include "wx/pen.h"
 #include "wx/palette.h"
 #include "wx/list.h"            // we use wxList in inline functions
 #include "wx/dynarray.h"
+#include "wx/math.h"
 
 class WXDLLEXPORT wxDC;
 class WXDLLEXPORT wxDCBase;
@@ -39,7 +38,7 @@ class WXDLLEXPORT wxDrawObject
 public:
 
     wxDrawObject()
-        : m_isBBoxValid(FALSE)
+        : m_isBBoxValid(false)
         , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
     { }
 
@@ -58,7 +57,7 @@ public:
       }
       else
       {
-         m_isBBoxValid = TRUE;
+         m_isBBoxValid = true;
 
          m_minX = x;
          m_minY = y;
@@ -69,7 +68,7 @@ public:
 
     void ResetBoundingBox()
     {
-        m_isBBoxValid = FALSE;
+        m_isBBoxValid = false;
 
         m_minX = m_maxX = m_minY = m_maxY = 0;
     }
@@ -95,8 +94,6 @@ protected:
 // global variables
 // ---------------------------------------------------------------------------
 
-WXDLLEXPORT_DATA(extern int) wxPageNumber;
-
 // ---------------------------------------------------------------------------
 // wxDC is the device context - object on which any drawing is done
 // ---------------------------------------------------------------------------
@@ -106,10 +103,10 @@ class WXDLLEXPORT wxDCBase : public wxObject
 public:
     wxDCBase()
         : m_colour(wxColourDisplay())
-        , m_ok(TRUE)
-        , m_clipping(FALSE)
+        , m_ok(true)
+        , m_clipping(false)
         , m_isInteractive(0)
-        , m_isBBoxValid(FALSE)
+        , m_isBBoxValid(false)
         , m_logicalOriginX(0), m_logicalOriginY(0)
         , m_deviceOriginX(0), m_deviceOriginY(0)
         , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
@@ -129,16 +126,14 @@ public:
         , m_font()
 #if wxUSE_PALETTE
         , m_palette()
-        , m_hasCustomPalette(FALSE)
+        , m_hasCustomPalette(false)
 #endif // wxUSE_PALETTE
     {
         ResetBoundingBox();
+        ResetClipping();
     }
 
-    ~wxDCBase() { }
-
-    virtual void BeginDrawing() { }
-    virtual void EndDrawing() { }
+    virtual ~wxDCBase() { }
 
     // graphic primitives
     // ------------------
@@ -157,6 +152,28 @@ public:
                    int style = wxFLOOD_SURFACE)
         { return DoFloodFill(pt.x, pt.y, col, style); }
 
+    // fill the area specified by rect with a radial gradient, starting from
+    // initialColour in the centre of the cercle and fading to destColour.
+    void GradientFillConcentric(const wxRect& rect,
+                                const wxColour& initialColour,
+                                const wxColour& destColour)
+        { GradientFillConcentric(rect, initialColour, destColour,
+                                 wxPoint(rect.GetWidth() / 2,
+                                         rect.GetHeight() / 2)); }
+
+    void GradientFillConcentric(const wxRect& rect,
+                                const wxColour& initialColour,
+                                const wxColour& destColour,
+                                const wxPoint& circleCenter)
+        { DoGradientFillConcentric(rect, initialColour, destColour, circleCenter); }
+
+    // fill the area specified by rect with a linear gradient
+    void GradientFillLinear(const wxRect& rect,
+                            const wxColour& initialColour,
+                            const wxColour& destColour,
+                            wxDirection nDirection = wxEAST)
+        { DoGradientFillLinear(rect, initialColour, destColour, nDirection); }
+
     bool GetPixel(wxCoord x, wxCoord y, wxColour *col) const
         { return DoGetPixel(x, y, col); }
     bool GetPixel(const wxPoint& pt, wxColour *col) const
@@ -250,10 +267,10 @@ public:
         { DoDrawIcon(icon, pt.x, pt.y); }
 
     void DrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
-                    bool useMask = FALSE)
+                    bool useMask = false)
         { DoDrawBitmap(bmp, x, y, useMask); }
     void DrawBitmap(const wxBitmap &bmp, const wxPoint& pt,
-                    bool useMask = FALSE)
+                    bool useMask = false)
         { DoDrawBitmap(bmp, pt.x, pt.y, useMask); }
 
     void DrawText(const wxString& text, wxCoord x, wxCoord y)
@@ -284,19 +301,43 @@ public:
 
     bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
               wxDC *source, wxCoord xsrc, wxCoord ysrc,
-              int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1)
+              int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
     {
         return DoBlit(xdest, ydest, width, height,
                       source, xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
     }
     bool Blit(const wxPoint& destPt, const wxSize& sz,
               wxDC *source, const wxPoint& srcPt,
-              int rop = wxCOPY, bool useMask = FALSE, const wxPoint& srcPtMask = wxPoint(-1, -1))
+              int rop = wxCOPY, bool useMask = false, const wxPoint& srcPtMask = wxDefaultPosition)
     {
         return DoBlit(destPt.x, destPt.y, sz.x, sz.y,
                       source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y);
     }
 
+    bool StretchBlit(wxCoord dstX, wxCoord dstY, 
+                     wxCoord dstWidth, wxCoord dstHeight,
+                     wxDC *source, 
+                     wxCoord srcX, wxCoord srcY,
+                     wxCoord srcWidth, wxCoord srcHeight,
+                     int rop = wxCOPY, bool useMask = false, 
+                     wxCoord srcMaskX = wxDefaultCoord, wxCoord srcMaskY = wxDefaultCoord)
+    {
+        return DoStretchBlit(dstX, dstY, dstWidth, dstHeight,
+                      source, srcX, srcY, srcWidth, srcHeight, rop, useMask, srcMaskX, srcMaskY);
+    }
+    bool StretchBlit(const wxPoint& dstPt, const wxSize& dstSize,
+                     wxDC *source, const wxPoint& srcPt, const wxSize& srcSize,
+                     int rop = wxCOPY, bool useMask = false, const wxPoint& srcMaskPt = wxDefaultPosition)
+    {
+        return DoStretchBlit(dstPt.x, dstPt.y, dstSize.x, dstSize.y,
+                      source, srcPt.x, srcPt.y, srcSize.x, srcSize.y, rop, useMask, srcMaskPt.x, srcMaskPt.y);
+    }
+
+    wxBitmap GetAsBitmap(const wxRect *subrect = (const wxRect *) NULL) const
+    {
+        return DoGetAsBitmap(subrect);
+    }
+
 #if wxUSE_SPLINES
     // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?)
     void DrawSpline(wxCoord x1, wxCoord y1,
@@ -314,18 +355,18 @@ public:
      *  \param y Upper left corner of bounding box.
      *  \param w Width of bounding box.
      *  \param h Height of bounding box.
-     *  \param sa Starting angle of arc 
+     *  \param sa Starting angle of arc
      *            (counterclockwise, start at 3 o'clock, 360 is full circle).
      *  \param ea Ending angle of arc.
-     *  \param angle Rotation angle, the Arc will be rotated after 
+     *  \param angle Rotation angle, the Arc will be rotated after
      *               calculating begin and end.
      */
-    void DrawEllipticArcRot( wxCoord x, wxCoord y, 
-                             wxCoord width, wxCoord height, 
+    void DrawEllipticArcRot( wxCoord x, wxCoord y,
+                             wxCoord width, wxCoord height,
                              double sa = 0, double ea = 0, double angle = 0 )
     { DoDrawEllipticArcRot( x, y, width, height, sa, ea, angle ); }
-    
-    void DrawEllipticArcRot( const wxPoint& pt, 
+
+    void DrawEllipticArcRot( const wxPoint& pt,
                              const wxSize& sz,
                              double sa = 0, double ea = 0, double angle = 0 )
     { DoDrawEllipticArcRot( pt.x, pt.y, sz.x, sz.y, sa, ea, angle ); }
@@ -334,38 +375,44 @@ public:
                              double sa = 0, double ea = 0, double angle = 0 )
     { DoDrawEllipticArcRot( rect.x, rect.y, rect.width, rect.height, sa, ea, angle ); }
 
-    virtual void DoDrawEllipticArcRot( wxCoord x, wxCoord y, 
-                                       wxCoord w, wxCoord h, 
+    virtual void DoDrawEllipticArcRot( wxCoord x, wxCoord y,
+                                       wxCoord w, wxCoord h,
                                        double sa = 0, double ea = 0, double angle = 0 );
-    
+
     //! Rotates points around center.
     /*! This is a quite straight method, it calculates in pixels
      *  and so it produces rounding errors.
      *  \param points The points inside will be rotated.
      *  \param angle Rotating angle (counterclockwise, start at 3 o'clock, 360 is full circle).
      *  \param center Center of rotation.
-     */ 
-    void Rotate( wxList* points, double angle, wxPoint center = wxPoint() );
+     */
+    void Rotate( wxList* points, double angle, wxPoint center = wxPoint(0,0) );
 
     // used by DrawEllipticArcRot
     // Careful: wxList gets filled with points you have to delete later.
-    void CalculateEllipticPoints( wxList* points, 
-                                  wxCoord xStart, wxCoord yStart, 
-                                  wxCoord w, wxCoord h, 
+    void CalculateEllipticPoints( wxList* points,
+                                  wxCoord xStart, wxCoord yStart,
+                                  wxCoord w, wxCoord h,
                                   double sa, double ea );
 #endif
-    
+
     // global DC operations
     // --------------------
 
     virtual void Clear() = 0;
 
-    virtual bool StartDoc(const wxString& WXUNUSED(message)) { return TRUE; }
+    virtual bool StartDoc(const wxString& WXUNUSED(message)) { return true; }
     virtual void EndDoc() { }
 
     virtual void StartPage() { }
     virtual void EndPage() { }
 
+#if WXWIN_COMPATIBILITY_2_6
+    wxDEPRECATED( void BeginDrawing() );
+    wxDEPRECATED( void EndDrawing() );
+#endif // WXWIN_COMPATIBILITY_2_6
+
+
     // set objects to use for drawing
     // ------------------------------
 
@@ -390,21 +437,13 @@ public:
     void SetClippingRegion(const wxRegion& region)
         { DoSetClippingRegionAsRegion(region); }
 
-    virtual void DestroyClippingRegion() = 0;
+    virtual void DestroyClippingRegion() { ResetClipping(); }
 
     void GetClippingBox(wxCoord *x, wxCoord *y, wxCoord *w, wxCoord *h) const
         { DoGetClippingBox(x, y, w, h); }
     void GetClippingBox(wxRect& rect) const
         {
-#if 1
           DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height);
-#else
-          // Necessary to use intermediate variables for 16-bit compilation
-          // REMOVE ME if the above is OK for all current platforms
-          wxCoord x, y, w, h;
-          DoGetClippingBox(&x, &y, &w, &h);
-          rect.x = x; rect.y = y; rect.width = w; rect.height = h;
-#endif
         }
 
     // text extent
@@ -421,18 +460,32 @@ public:
                        wxFont *theFont = NULL) const
         { DoGetTextExtent(string, x, y, descent, externalLeading, theFont); }
 
+    wxSize GetTextExtent(const wxString& string) const
+    {
+        wxCoord w, h;
+        DoGetTextExtent(string, &w, &h);
+        return wxSize(w, h);
+    }
+
     // works for single as well as multi-line strings
-    virtual void GetMultiLineTextExtent(const wxString& text,
+    virtual void GetMultiLineTextExtent(const wxString& string,
                                         wxCoord *width,
                                         wxCoord *height,
                                         wxCoord *heightLine = NULL,
-                                        wxFont *font = NULL);
+                                        wxFont *font = NULL) const;
+
+    wxSize GetMultiLineTextExtent(const wxString& string) const
+    {
+        wxCoord w, h;
+        GetMultiLineTextExtent(string, &w, &h);
+        return wxSize(w, h);
+    }
 
     // Measure cumulative width of text after each character
     bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
         { return DoGetPartialTextExtents(text, widths); }
 
-    
+
     // size and resolution
     // -------------------
 
@@ -484,34 +537,26 @@ public:
     // Resolution in Pixels per inch
     virtual wxSize GetPPI() const = 0;
 
-    virtual bool Ok() const { return m_ok; }
-
-    // accessors
-    // ---------
+    virtual bool Ok() const { return IsOk(); }
+    virtual bool IsOk() const { return m_ok; }
 
-        // const...
-    int GetBackgroundMode() const { return m_backgroundMode; }
-    const wxBrush&  GetBackground() const { return m_backgroundBrush; }
-    const wxBrush&  GetBrush() const { return m_brush; }
-    const wxFont&   GetFont() const { return m_font; }
-    const wxPen&    GetPen() const { return m_pen; }
-    const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
-    const wxColour& GetTextForeground() const { return m_textForegroundColour; }
+    // accessors and setters
+    // ---------------------
 
-        // ... and non const
-    wxBrush&  GetBackground() { return m_backgroundBrush; }
-    wxBrush&  GetBrush() { return m_brush; }
-    wxFont&   GetFont() { return m_font; }
-    wxPen&    GetPen() { return m_pen; }
-    wxColour& GetTextBackground() { return m_textBackgroundColour; }
-    wxColour& GetTextForeground() { return m_textForegroundColour; }
+    virtual int GetBackgroundMode() const { return m_backgroundMode; }
+    virtual const wxBrush&  GetBackground() const { return m_backgroundBrush; }
+    virtual const wxBrush&  GetBrush() const { return m_brush; }
+    virtual const wxFont&   GetFont() const { return m_font; }
+    virtual const wxPen&    GetPen() const { return m_pen; }
 
+    virtual const wxColour& GetTextForeground() const { return m_textForegroundColour; }
+    virtual const wxColour& GetTextBackground() const { return m_textBackgroundColour; }
     virtual void SetTextForeground(const wxColour& colour)
         { m_textForegroundColour = colour; }
     virtual void SetTextBackground(const wxColour& colour)
         { m_textBackgroundColour = colour; }
 
-    int GetMapMode() const { return m_mappingMode; }
+    virtual int GetMapMode() const { return m_mappingMode; }
     virtual void SetMapMode(int mode) = 0;
 
     virtual void GetUserScale(double *x, double *y) const
@@ -544,18 +589,13 @@ public:
         { wxCoord x, y; DoGetDeviceOrigin(&x, &y); return wxPoint(x, y); }
     virtual void SetDeviceOrigin(wxCoord x, wxCoord y) = 0;
 
+    virtual void ComputeScaleAndOrigin() {}
+
     virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) = 0;
 
-    int GetLogicalFunction() const { return m_logicalFunction; }
+    virtual int GetLogicalFunction() const { return m_logicalFunction; }
     virtual void SetLogicalFunction(int function) = 0;
 
-    // Sometimes we need to override optimization, e.g. if other software is
-    // drawing onto our surface and we can't be sure of who's done what.
-    //
-    // FIXME: is this (still) used?
-    virtual void SetOptimization(bool WXUNUSED(opt)) { }
-    virtual bool GetOptimization() { return FALSE; }
-
     // bounding box
     // ------------
 
@@ -570,7 +610,7 @@ public:
       }
       else
       {
-         m_isBBoxValid = TRUE;
+         m_isBBoxValid = true;
 
          m_minX = x;
          m_minY = y;
@@ -581,7 +621,7 @@ public:
 
     void ResetBoundingBox()
     {
-        m_isBBoxValid = FALSE;
+        m_isBBoxValid = false;
 
         m_minX = m_maxX = m_minY = m_maxY = 0;
     }
@@ -596,7 +636,6 @@ public:
     // ------------------
 
     // for compatibility with the old code when wxCoord was long everywhere
-#ifndef __WIN16__
     void GetTextExtent(const wxString& string,
                        long *x, long *y,
                        long *descent = NULL,
@@ -645,13 +684,32 @@ public:
         if (w) *w = ww;
         if (h) *h = hh;
     }
-#endif // !Win16
+
+    // RTL related functions
+    // ---------------------
+
+    // get or change the layout direction (LTR or RTL) for this dc,
+    // wxLayout_Default is returned if layout direction is not supported
+    virtual wxLayoutDirection GetLayoutDirection() const
+        { return wxLayout_Default; }
+    virtual void SetLayoutDirection(wxLayoutDirection WXUNUSED(dir))
+        { }
 
 protected:
     // the pure virtual functions which should be implemented by wxDC
     virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
                              int style = wxFLOOD_SURFACE) = 0;
 
+    virtual void DoGradientFillLinear(const wxRect& rect,
+                                      const wxColour& initialColour,
+                                      const wxColour& destColour,
+                                      wxDirection nDirection = wxEAST);
+
+    virtual void DoGradientFillConcentric(const wxRect& rect,
+                                        const wxColour& initialColour,
+                                        const wxColour& destColour,
+                                        const wxPoint& circleCenter);
+
     virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const = 0;
 
     virtual void DoDrawPoint(wxCoord x, wxCoord y) = 0;
@@ -676,7 +734,7 @@ protected:
 
     virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y) = 0;
     virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
-                              bool useMask = FALSE) = 0;
+                              bool useMask = false) = 0;
 
     virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) = 0;
     virtual void DoDrawRotatedText(const wxString& text,
@@ -684,8 +742,25 @@ protected:
 
     virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
                         wxCoord width, wxCoord height,
-                        wxDC *source, wxCoord xsrc, wxCoord ysrc,
-                        int rop = wxCOPY, bool useMask = FALSE, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1) = 0;
+                        wxDC *source,
+                        wxCoord xsrc, wxCoord ysrc,
+                        int rop = wxCOPY,
+                        bool useMask = false,
+                        wxCoord xsrcMask = wxDefaultCoord,
+                        wxCoord ysrcMask = wxDefaultCoord) = 0;
+
+    virtual bool DoStretchBlit(wxCoord xdest, wxCoord ydest,
+                               wxCoord dstWidth, wxCoord dstHeight,
+                               wxDC *source,
+                               wxCoord xsrc, wxCoord ysrc,
+                               wxCoord srcWidth, wxCoord srcHeight,
+                               int rop = wxCOPY,
+                               bool useMask = false,
+                               wxCoord xsrcMask = wxDefaultCoord,
+                               wxCoord ysrcMask = wxDefaultCoord);
+
+    virtual wxBitmap DoGetAsBitmap(const wxRect *WXUNUSED(subrect)) const
+        { return wxNullBitmap; }
 
     virtual void DoGetSize(int *width, int *height) const = 0;
     virtual void DoGetSizeMM(int* width, int* height) const = 0;
@@ -703,24 +778,17 @@ protected:
     virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
                                      wxCoord width, wxCoord height) = 0;
 
-    // FIXME are these functions really different?
-    virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y,
-                                     wxCoord *w, wxCoord *h)
-        { DoGetClippingBox(x, y, w, h); }
     virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
                                   wxCoord *w, wxCoord *h) const
     {
-        if ( m_clipping )
-        {
-            if ( x ) *x = m_clipX1;
-            if ( y ) *y = m_clipY1;
-            if ( w ) *w = m_clipX2 - m_clipX1;
-            if ( h ) *h = m_clipY2 - m_clipY1;
-        }
-        else
-        {
-            *x = *y = *w = *h = 0;
-        }
+        if ( x )
+            *x = m_clipX1;
+        if ( y )
+            *y = m_clipY1;
+        if ( w )
+            *w = m_clipX2 - m_clipX1;
+        if ( h )
+            *h = m_clipY2 - m_clipY1;
     }
 
     virtual void DoGetLogicalOrigin(wxCoord *x, wxCoord *y) const
@@ -740,14 +808,22 @@ protected:
                                  wxCoord *descent = NULL,
                                  wxCoord *externalLeading = NULL,
                                  wxFont *theFont = NULL) const = 0;
-    
+
     virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
-    
+
 #if wxUSE_SPLINES
     virtual void DoDrawSpline(wxList *points);
 #endif
 
 protected:
+    // unset clipping variables (after clipping region was destroyed)
+    void ResetClipping()
+    {
+        m_clipping = false;
+
+        m_clipX1 = m_clipX2 = m_clipY1 = m_clipY2 = 0;
+    }
+
     // flags
     bool m_colour:1;
     bool m_ok:1;
@@ -799,16 +875,22 @@ private:
 // now include the declaration of wxDC class
 // ----------------------------------------------------------------------------
 
-#if defined(__WXMSW__)
+#if defined(__WXPALMOS__)
+    #include "wx/palmos/dc.h"
+#elif defined(__WXMSW__)
     #include "wx/msw/dc.h"
 #elif defined(__WXMOTIF__)
     #include "wx/motif/dc.h"
-#elif defined(__WXGTK__)
+#elif defined(__WXGTK20__)
     #include "wx/gtk/dc.h"
+#elif defined(__WXGTK__)
+    #include "wx/gtk1/dc.h"
 #elif defined(__WXX11__)
     #include "wx/x11/dc.h"
 #elif defined(__WXMGL__)
     #include "wx/mgl/dc.h"
+#elif defined(__WXDFB__)
+    #include "wx/dfb/dc.h"
 #elif defined(__WXMAC__)
     #include "wx/mac/dc.h"
 #elif defined(__WXCOCOA__)
@@ -817,6 +899,10 @@ private:
     #include "wx/os2/dc.h"
 #endif
 
+#if wxUSE_GRAPHICS_CONTEXT
+    #include "wx/dcgraph.h"
+#endif
+
 // ----------------------------------------------------------------------------
 // helper class: you can use it to temporarily change the DC text colour and
 // restore it automatically when the object goes out of scope
@@ -827,6 +913,11 @@ class WXDLLEXPORT wxDCTextColourChanger
 public:
     wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { }
 
+    wxDCTextColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc)
+    {
+        Set(col);
+    }
+
     ~wxDCTextColourChanger()
     {
         if ( m_colFgOld.Ok() )
@@ -848,6 +939,60 @@ private:
     DECLARE_NO_COPY_CLASS(wxDCTextColourChanger)
 };
 
+// ----------------------------------------------------------------------------
+// helper class: you can use it to temporarily change the DC pen and
+// restore it automatically when the object goes out of scope
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxDCPenChanger
+{
+public:
+    wxDCPenChanger(wxDC& dc, const wxPen& pen) : m_dc(dc), m_penOld(dc.GetPen())
+    {
+        m_dc.SetPen(pen);
+    }
+
+    ~wxDCPenChanger()
+    {
+        if ( m_penOld.Ok() )
+            m_dc.SetPen(m_penOld);
+    }
+
+private:
+    wxDC& m_dc;
+
+    wxPen m_penOld;
+
+    DECLARE_NO_COPY_CLASS(wxDCPenChanger)
+};
+
+// ----------------------------------------------------------------------------
+// helper class: you can use it to temporarily change the DC brush and
+// restore it automatically when the object goes out of scope
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxDCBrushChanger
+{
+public:
+    wxDCBrushChanger(wxDC& dc, const wxBrush& brush) : m_dc(dc), m_brushOld(dc.GetBrush())
+    {
+        m_dc.SetBrush(brush);
+    }
+
+    ~wxDCBrushChanger()
+    {
+        if ( m_brushOld.Ok() )
+            m_dc.SetBrush(m_brushOld);
+    }
+
+private:
+    wxDC& m_dc;
+
+    wxBrush m_brushOld;
+
+    DECLARE_NO_COPY_CLASS(wxDCBrushChanger)
+};
+
 // ----------------------------------------------------------------------------
 // another small helper class: sets the clipping region in its ctor and
 // destroys it in the dtor
@@ -856,6 +1001,8 @@ private:
 class WXDLLEXPORT wxDCClipper
 {
 public:
+    wxDCClipper(wxDC& dc, const wxRegion& r) : m_dc(dc)
+        { dc.SetClippingRegion(r); }
     wxDCClipper(wxDC& dc, const wxRect& r) : m_dc(dc)
         { dc.SetClippingRegion(r.x, r.y, r.width, r.height); }
     wxDCClipper(wxDC& dc, wxCoord x, wxCoord y, wxCoord w, wxCoord h) : m_dc(dc)
@@ -869,5 +1016,4 @@ private:
     DECLARE_NO_COPY_CLASS(wxDCClipper)
 };
 
-#endif
-    // _WX_DC_H_BASE_
+#endif // _WX_DC_H_BASE_