/////////////////////////////////////////////////////////////////////////////
-// Name: dc.h
+// Name: wx/msw/dc.h
// Purpose: wxDC class
// Author: Julian Smart
// Modified by:
// Created: 01/02/97
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifndef _WX_DC_H_
-#define _WX_DC_H_
+#ifndef _WX_MSW_DC_H_
+#define _WX_MSW_DC_H_
-#ifdef __GNUG__
-#pragma interface "dc.h"
-#endif
+#include "wx/defs.h"
-#include "wx/pen.h"
-#include "wx/brush.h"
-#include "wx/icon.h"
-#include "wx/font.h"
-#include "wx/gdicmn.h"
+// ---------------------------------------------------------------------------
+// macros
+// ---------------------------------------------------------------------------
-class WXDLLEXPORT wxDC: public wxObject
+#if wxUSE_DC_CACHEING
+/*
+ * Cached blitting, maintaining a cache
+ * of bitmaps required for transparent blitting
+ * instead of constant creation/deletion
+ */
+
+class wxDCCacheEntry: public wxObject
{
- DECLARE_ABSTRACT_CLASS(wxDC)
- protected:
public:
- wxDC(void);
- ~wxDC(void);
-
- inline void wxDC::BeginDrawing(void) {}
- inline void wxDC::EndDrawing(void) {}
-
- virtual void FloodFill(long x1, long y1, const wxColour& col, int style=wxFLOOD_SURFACE) ;
- inline void FloodFill(const wxPoint& pt, const wxColour& col, int style=wxFLOOD_SURFACE)
- {
- FloodFill(pt.x, pt.y, col, style);
- }
-
- virtual bool GetPixel(long x1, long y1, wxColour *col) const ;
- inline bool GetPixel(const wxPoint& pt, wxColour *col) const
- {
- return GetPixel(pt.x, pt.y, col);
- }
-
- virtual void DrawLine(long x1, long y1, long x2, long y2);
- inline void DrawLine(const wxPoint& pt1, const wxPoint& pt2)
- {
- DrawLine(pt1.x, pt1.y, pt2.x, pt2.y);
- }
-
- virtual void CrossHair(long x, long y) ;
- virtual void CrossHair(const wxPoint& pt)
- {
- CrossHair(pt.x, pt.y);
- }
-
- virtual void DrawArc(long x1,long y1,long x2,long y2,double xc, double yc);
- inline void DrawArc(const wxPoint& pt1, const wxPoint& pt2, double xc, double yc)
- {
- DrawArc(pt1.x, pt1.y, pt2.x, pt2.y, xc, yc);
- }
-
- virtual void DrawEllipticArc (long x, long y, long w, long h, double sa, double ea);
- virtual void DrawEllipticArc (const wxPoint& pt, const wxSize& sz, double sa, double ea)
- {
- DrawEllipticArc(pt.x, pt.y, sz.x, sz.y, sa, ea);
- }
-
- virtual void DrawPoint(long x, long y);
- inline void DrawPoint(const wxPoint& pt)
- {
- DrawPoint(pt.x, pt.y);
- }
-
- virtual void DrawLines(int n, wxPoint points[], long xoffset = 0, long yoffset = 0);
-
- virtual void DrawPolygon(int n, wxPoint points[], long xoffset = 0, long yoffset = 0, int fillStyle=wxODDEVEN_RULE);
-
- virtual void DrawRectangle(long x, long y, long width, long height);
- inline void DrawRectangle(const wxPoint& pt, const wxSize& sz)
- {
- DrawRectangle(pt.x, pt.y, sz.x, sz.y);
- }
- inline void DrawRectangle(const wxRect& rect)
- {
- DrawRectangle(rect.x, rect.y, rect.width, rect.height);
- }
-
- virtual void DrawRoundedRectangle(long x, long y, long width, long height, double radius = 20.0);
- inline void DrawRoundedRectangle(const wxPoint& pt, const wxSize& sz, double radius = 20.0)
- {
- DrawRoundedRectangle(pt.x, pt.y, sz.x, sz.y, radius);
- }
- inline void DrawRoundedRectangle(const wxRect& rect, double radius = 20.0)
- {
- DrawRoundedRectangle(rect.x, rect.y, rect.width, rect.height, radius);
- }
-
- virtual void DrawEllipse(long x, long y, long width, long height);
- inline void DrawEllipse(const wxPoint& pt, const wxSize& sz)
- {
- DrawEllipse(pt.x, pt.y, sz.x, sz.y);
- }
- inline void DrawEllipse(const wxRect& rect)
- {
- DrawEllipse(rect.x, rect.y, rect.width, rect.height);
- }
-
- virtual void DrawIcon(const wxIcon& icon, long x, long y);
- inline void DrawIcon(const wxIcon& icon, const wxPoint& pt)
- {
- DrawIcon(icon, pt.x, pt.y);
- }
-
- inline void DrawPoint(wxPoint& point) { DrawPoint(point.x, point.y); }
- virtual void DrawLines(wxList *list, long xoffset = 0, long yoffset = 0);
- virtual void DrawPolygon(wxList *list, long xoffset = 0, long yoffset = 0, int fillStyle=wxODDEVEN_RULE);
-
- virtual void DrawText(const wxString& text, long x, long y, bool use16bit = FALSE);
- inline void DrawText(const wxString& text, const wxPoint& pt, bool use16bit = FALSE)
- {
- DrawText(text, pt.x, pt.y, use16bit);
- }
-
- virtual bool Blit(long xdest, long ydest, long width, long height,
- wxDC *source, long xsrc, long ysrc, int rop = wxCOPY, bool useMask = FALSE);
- inline bool Blit(const wxPoint& destPt, const wxSize& sz,
- wxDC *source, const wxPoint& srcPt, int rop = wxCOPY, bool useMask = FALSE)
- {
- return Blit(destPt.x, destPt.y, sz.x, sz.y, source, srcPt.x, srcPt.y, rop, useMask);
- }
-
-#if USE_SPLINES
- // Splines
- // 3-point spline
- virtual void DrawSpline(long x1, long y1, long x2, long y2, long x3, long y3);
- // Any number of control points - a list of pointers to wxPoints
- virtual void DrawSpline(wxList *points);
- virtual void DrawSpline(int n, wxPoint points[]);
-#endif
- virtual void Clear(void);
- virtual void SetFont(const wxFont& font);
- virtual void SetPen(const wxPen& pen);
- virtual void SetBrush(const wxBrush& brush);
- virtual void SetLogicalFunction(int function);
- virtual void SetBackground(const wxBrush& brush);
- virtual void SetBackgroundMode(int mode);
-
- virtual void SetClippingRegion(long x, long y, long width, long height);
- inline void SetClippingRegion(const wxPoint& pt, const wxSize& sz)
- {
- SetClippingRegion(pt.x, pt.y, sz.x, sz.y);
- }
- inline void SetClippingRegion(const wxRect& rect)
- {
- SetClippingRegion(rect.x, rect.y, rect.width, rect.height);
- }
-
- virtual void SetPalette(const wxPalette& palette);
-#if WXWIN_COMPATIBILITY
- virtual inline void SetColourMap(const wxPalette& palette) { SetPalette(palette); };
-#endif
- virtual void DestroyClippingRegion(void);
- virtual long GetCharHeight(void) const;
- virtual long GetCharWidth(void) const;
- virtual void GetTextExtent(const wxString& string, long *x, long *y,
- long *descent = NULL, long *externalLeading = NULL,
- wxFont *theFont = NULL, bool use16bit = FALSE) const;
-#if WXWIN_COMPATIBILITY
- void GetTextExtent(const wxString& string, float *x, float *y,
- float *descent = NULL, float *externalLeading = NULL,
- wxFont *theFont = NULL, bool use16bit = FALSE) const ;
+ wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth);
+ wxDCCacheEntry(WXHDC hDC, int depth);
+ ~wxDCCacheEntry();
+
+ WXHBITMAP m_bitmap;
+ WXHDC m_dc;
+ int m_width;
+ int m_height;
+ int m_depth;
+};
#endif
- // Size in device units
- virtual void GetSize(int* width, int* height) const;
- inline wxSize GetSize(void) const { int w, h; GetSize(&w, &h); return wxSize(w, h); }
-
- // Size in mm
- virtual void GetSizeMM(long* width, long* height) const ;
-
- // Compatibility
-#if WXWIN_COMPATIBILITY
- inline void GetSize(float* width, float* height) const { int w, h; GetSize(& w, & h); *width = w; *height = h; }
- inline void GetSizeMM(float *width, float *height) const { long w, h; GetSizeMM(& w, & h); *width = (float) w; *height = (float) h; }
+// this is an ABC: use one of the derived classes to create a DC associated
+// with a window, screen, printer and so on
+class WXDLLEXPORT wxDC : public wxDCBase
+{
+public:
+ wxDC(WXHDC hDC) { Init(); m_hDC = hDC; }
+ ~wxDC();
+
+ // implement base class pure virtuals
+ // ----------------------------------
+
+ virtual void Clear();
+
+ virtual bool StartDoc(const wxString& message);
+ virtual void EndDoc();
+
+ virtual void StartPage();
+ virtual void EndPage();
+
+ virtual void SetFont(const wxFont& font);
+ virtual void SetPen(const wxPen& pen);
+ virtual void SetBrush(const wxBrush& brush);
+ virtual void SetBackground(const wxBrush& brush);
+ virtual void SetBackgroundMode(int mode);
+#if wxUSE_PALETTE
+ virtual void SetPalette(const wxPalette& palette);
+#endif // wxUSE_PALETTE
+
+ virtual void DestroyClippingRegion();
+
+ virtual wxCoord GetCharHeight() const;
+ virtual wxCoord GetCharWidth() const;
+ virtual void DoGetTextExtent(const wxString& string,
+ wxCoord *x, wxCoord *y,
+ wxCoord *descent = NULL,
+ wxCoord *externalLeading = NULL,
+ wxFont *theFont = NULL) const;
+ virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;
+
+ virtual bool CanDrawBitmap() const;
+ virtual bool CanGetTextExtent() const;
+ virtual int GetDepth() const;
+ virtual wxSize GetPPI() const;
+
+ virtual void SetMapMode(int mode);
+ virtual void SetUserScale(double x, double y);
+ virtual void SetSystemScale(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 SetLogicalFunction(int function);
+
+ // implementation from now on
+ // --------------------------
+
+ virtual void SetRop(WXHDC cdc);
+ virtual void SelectOldObjects(WXHDC dc);
+
+ wxWindow *GetWindow() const { return m_canvas; }
+ void SetWindow(wxWindow *win)
+ {
+ m_canvas = win;
+
+#if wxUSE_PALETTE
+ // if we have palettes use the correct one for this window
+ InitializePalette();
+#endif // wxUSE_PALETTE
+ }
+
+ WXHDC GetHDC() const { return m_hDC; }
+ void SetHDC(WXHDC dc, bool bOwnsDC = false)
+ {
+ m_hDC = dc;
+ m_bOwnsDC = bOwnsDC;
+
+ // we might have a pre existing clipping region, make sure that we
+ // return it if asked -- but avoid calling ::GetClipBox() right now as
+ // it could be unnecessary wasteful
+ m_clipping = true;
+ m_clipX1 =
+ m_clipX2 = 0;
+ }
+
+ const wxBitmap& GetSelectedBitmap() const { return m_selectedBitmap; }
+ wxBitmap& GetSelectedBitmap() { return m_selectedBitmap; }
+
+ // update the internal clip box variables
+ void UpdateClipBox();
+
+#if wxUSE_DC_CACHEING
+ static wxDCCacheEntry* FindBitmapInCache(WXHDC hDC, int w, int h);
+ static wxDCCacheEntry* FindDCInCache(wxDCCacheEntry* notThis, WXHDC hDC);
+
+ static void AddToBitmapCache(wxDCCacheEntry* entry);
+ static void AddToDCCache(wxDCCacheEntry* entry);
+ static void ClearCache();
#endif
- virtual bool StartDoc(const wxString& message);
- virtual void EndDoc(void);
- virtual void StartPage(void);
- virtual void EndPage(void);
- virtual void SetMapMode(int mode);
- virtual void SetUserScale(double x, double y);
- virtual void SetSystemScale(double x, double y);
- virtual void SetLogicalOrigin(long x, long y);
- virtual void SetDeviceOrigin(long x, long y);
- virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
-
- // This group of functions does actual conversion
- // of the input, as you'd expect.
-
- long DeviceToLogicalX(long x) const;
- long DeviceToLogicalY(long y) const;
- long DeviceToLogicalXRel(long x) const;
- long DeviceToLogicalYRel(long y) const;
- long LogicalToDeviceX(long x) const;
- long LogicalToDeviceY(long y) const;
- long LogicalToDeviceXRel(long x) const;
- long LogicalToDeviceYRel(long y) const;
-
- // This group of functions may not do any conversion
- // if m_scaleGDI is TRUE, since the HDC does the
- // conversion automatically.
- // m_scaleGDI NOW OBSOLETE
- long ImplDeviceToLogicalX(long x) const;
- long ImplDeviceToLogicalY(long y) const;
- long ImplDeviceToLogicalXRel(long x) const;
- long ImplDeviceToLogicalYRel(long y) const;
- long ImplLogicalToDeviceX(long x) const;
- long ImplLogicalToDeviceY(long y) const;
- long ImplLogicalToDeviceXRel(long x) const;
- long ImplLogicalToDeviceYRel(long y) const;
-
- virtual bool CanDrawBitmap(void) const;
- virtual bool CanGetTextExtent(void) const;
-
- virtual void SetTextForeground(const wxColour& colour);
- virtual void SetTextBackground(const wxColour& colour);
- inline virtual bool Ok(void) const {return m_ok;};
- inline virtual int GetMapMode(void) const {return m_mappingMode;};
-
- inline virtual wxBrush *GetBackground(void) const { return (wxBrush*) &m_backgroundBrush ;}
- inline virtual wxBrush *GetBrush(void) const { return (wxBrush*) &m_brush ;}
- inline virtual wxFont *GetFont(void) const { return (wxFont*) &m_font ;}
- inline virtual int GetLogicalFunction(void) const { return m_logicalFunction ;}
- inline virtual wxPen *GetPen(void) const { return (wxPen*) &m_pen ;}
- inline virtual wxColour&GetTextBackground(void) const { return (wxColour&) m_textBackgroundColour ;}
- inline virtual wxColour&GetTextForeground(void) const { return (wxColour&) m_textForegroundColour ;}
-
- virtual void SetLogicalScale(double x, double y);
- virtual inline void GetUserScale(double* x, double *y) const { *x = m_userScaleX; *y = m_userScaleY; }
- virtual void CalcBoundingBox(long x, long y);
- // Get the final bounding box of the PostScript or Metafile picture.
- virtual inline long MinX(void) const { return m_minX; }
- virtual inline long MaxX(void) const { return m_maxX; }
- virtual inline long MinY(void) const { return m_minY; }
- virtual inline long MaxY(void) const { return m_maxY; }
- // 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.
- virtual inline void SetOptimization(bool WXUNUSED(opt)) { }
- virtual inline bool GetOptimization(void) { return FALSE; }
-
- virtual void GetClippingBox(long *x,long *y,long *w,long *h) const ;
- inline void GetClippingBox(wxRect& rect) const
- {
- long x, y, w, h;
- GetClippingBox(&x, &y, &w, &h); rect.x = x; rect.y = y; rect.width = w; rect.height = h;
- }
-
- virtual void SetRop(WXHDC cdc);
- virtual void DoClipping(WXHDC cdc);
- virtual void SelectOldObjects(WXHDC dc);
-
- inline wxWindow *GetWindow(void) const { return m_canvas; }
- inline void SetWindow(wxWindow *win) { m_canvas = win; }
- inline WXHDC GetHDC(void) const { return m_hDC; }
- inline void SetHDC(WXHDC dc, bool bOwnsDC = FALSE) { m_hDC = dc; m_bOwnsDC = bOwnsDC; }
-
protected:
- bool m_colour;
- bool m_ok;
- bool m_clipping;
- bool m_isInteractive;
-
- // Coordinate system variables
- long m_logicalOriginX;
- long m_logicalOriginY;
-
- long m_deviceOriginX;
- long m_deviceOriginY;
-
- double m_logicalScaleX;
- double m_logicalScaleY;
-
- double m_userScaleX;
- double m_userScaleY;
-
- int m_signX; // Used by SetAxisOrientation() to
- int m_signY; // invert the axes
-
- int m_mappingMode;
-
- long m_minX; // bounding box
- long m_minY;
- long m_maxX;
- long m_maxY;
-
- int m_logicalFunction;
- int m_backgroundMode;
-
- wxPen m_pen;
- wxBrush m_brush;
- wxBrush m_backgroundBrush;
- wxColour m_textForegroundColour;
- wxColour m_textBackgroundColour;
- wxFont m_font;
- wxPalette m_palette;
- int m_clipX1;
- int m_clipY1;
- int m_clipX2;
- int m_clipY2;
-// bool m_dontDelete;
- int m_windowExtX;
- int m_windowExtY;
- double m_systemScaleX;
- double m_systemScaleY;
-
- wxWindow * m_canvas;
- wxBitmap m_selectedBitmap;
- wxString m_filename;
-
- // TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
- bool m_bOwnsDC;
-
- WXHDC m_hDC;
- int m_hDCCount;
-
- // Store all old GDI objects when do a SelectObject,
- // so we can select them back in (this unselecting user's
- // objects) so we can safely delete the DC.
- WXHBITMAP m_oldBitmap;
- WXHPEN m_oldPen;
- WXHBRUSH m_oldBrush;
- WXHFONT m_oldFont;
- WXHPALETTE m_oldPalette;
-
- // Stores scaling, translation, rotation
-// wxTransformMatrix m_transformMatrix;
-
- // Do we wish to scale GDI objects too, e.g. pen width?
-// bool m_scaleGDI;
-};
-
-// Logical to device
-// Absolute
-#define XLOG2DEV(x) ImplLogicalToDeviceX(x)
-
-#define YLOG2DEV(y) ImplLogicalToDeviceY(y)
-
-// Relative
-#define XLOG2DEVREL(x) ImplLogicalToDeviceXRel(x)
-#define YLOG2DEVREL(y) ImplLogicalToDeviceYRel(y)
-
-// Device to logical
-// Absolute
-#define XDEV2LOG(x) ImplDeviceToLogicalX(x)
-
-#define YDEV2LOG(y) ImplDeviceToLogicalY(y)
-
-// Relative
-#define XDEV2LOGREL(x) ImplDeviceToLogicalXRel(x)
-#define YDEV2LOGREL(y) ImplDeviceToLogicalYRel(y)
-
-/*
- * Have the same macros as for XView but not for every operation:
- * just for calculating window/viewport extent (a better way of scaling).
- */
-
-// Logical to device
-// Absolute
-#define MS_XLOG2DEV(x) LogicalToDevice(x)
-
-#define MS_YLOG2DEV(y) LogicalToDevice(y)
-
-// Relative
-#define MS_XLOG2DEVREL(x) LogicalToDeviceXRel(x)
-#define MS_YLOG2DEVREL(y) LogicalToDeviceYRel(y)
-
-// Device to logical
-// Absolute
-#define MS_XDEV2LOG(x) DeviceToLogicalX(x)
-
-#define MS_YDEV2LOG(y) DeviceToLogicalY(y)
-
-// Relative
-#define MS_XDEV2LOGREL(x) DeviceToLogicalXRel(x)
-#define MS_YDEV2LOGREL(y) DeviceToLogicalYRel(y)
-
-#define MM_POINTS 7
-#define MM_METRIC 8
-
-extern int wxPageNumber;
-
-// Conversion
-#define METRIC_CONVERSION_CONSTANT 0.0393700787
+ void Init()
+ {
+ m_canvas = NULL;
+ m_bOwnsDC = false;
+ m_hDC = NULL;
+
+ m_oldBitmap = NULL;
+ m_oldPen = NULL;
+ m_oldBrush = NULL;
+ m_oldFont = NULL;
+
+#if wxUSE_PALETTE
+ m_oldPalette = NULL;
+#endif // wxUSE_PALETTE
+ }
+
+ // create an uninitialized DC: this should be only used by the derived
+ // classes
+ wxDC() { Init(); }
+
+ virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
+ int style = wxFLOOD_SURFACE);
+
+ virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;
+
+ virtual void DoDrawPoint(wxCoord x, wxCoord y);
+ virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);
+
+ virtual void DoDrawArc(wxCoord x1, wxCoord y1,
+ wxCoord x2, wxCoord y2,
+ wxCoord xc, wxCoord yc);
+ virtual void DoDrawCheckMark(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height);
+ virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
+ double sa, double ea);
+
+ virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
+ virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height,
+ double radius);
+ virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
+
+#if wxUSE_SPLINES
+ virtual void DoDrawSpline(wxList *points);
+#endif
-// Scaling factors for various unit conversions
-#define mm2inches (METRIC_CONVERSION_CONSTANT)
-#define inches2mm (1/METRIC_CONVERSION_CONSTANT)
+ virtual void DoCrossHair(wxCoord x, wxCoord y);
+
+ virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
+ virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
+ bool useMask = false);
+
+ virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
+ virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
+ double angle);
+
+ 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 = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord);
+
+ // this is gnarly - we can't even call this function DoSetClippingRegion()
+ // because of virtual function hiding
+ virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
+ virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
+ wxCoord width, wxCoord height);
+ virtual void DoGetClippingBox(wxCoord *x, wxCoord *y,
+ wxCoord *w, wxCoord *h) const;
+
+ virtual void DoGetSizeMM(int* width, int* height) const;
+
+ virtual void DoDrawLines(int n, wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset);
+ virtual void DoDrawPolygon(int n, wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset,
+ int fillStyle = wxODDEVEN_RULE);
+ virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset,
+ int fillStyle = wxODDEVEN_RULE);
+
+
+#if wxUSE_PALETTE
+ // MSW specific, select a logical palette into the HDC
+ // (tell windows to translate pixel from other palettes to our custom one
+ // and vice versa)
+ // Realize tells it to also reset the system palette to this one.
+ void DoSelectPalette(bool realize = false);
+
+ // Find out what palette our parent window has, then select it into the dc
+ void InitializePalette();
+#endif // wxUSE_PALETTE
+
+ // common part of DoDrawText() and DoDrawRotatedText()
+ void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
+
+ // common part of DoSetClippingRegion() and DoSetClippingRegionAsRegion()
+ void SetClippingHrgn(WXHRGN hrgn);
+
+ // implementation of DoGetSize() for wxScreen/PrinterDC: this simply
+ // returns the size of the entire device this DC is associated with
+ //
+ // notice that we intentionally put it in a separate function instead of
+ // DoGetSize() itself because we want it to remain pure virtual both
+ // because each derived class should take care to define it as needed (this
+ // implementation is not at all always appropriate) and because we want
+ // wxDC to be an ABC to prevent it from being created directly
+ void GetDeviceSize(int *width, int *height) const;
+
+
+ // MSW-specific member variables
+ // -----------------------------
+
+ // the window associated with this DC (may be NULL)
+ wxWindow *m_canvas;
+
+ wxBitmap m_selectedBitmap;
+
+ // TRUE => DeleteDC() in dtor, FALSE => only ReleaseDC() it
+ bool m_bOwnsDC:1;
+
+ // our HDC
+ WXHDC m_hDC;
+
+ // Store all old GDI objects when do a SelectObject, so we can select them
+ // back in (this unselecting user's objects) so we can safely delete the
+ // DC.
+ WXHBITMAP m_oldBitmap;
+ WXHPEN m_oldPen;
+ WXHBRUSH m_oldBrush;
+ WXHFONT m_oldFont;
+
+#if wxUSE_PALETTE
+ WXHPALETTE m_oldPalette;
+#endif // wxUSE_PALETTE
+
+#if wxUSE_DC_CACHEING
+ static wxList sm_bitmapCache;
+ static wxList sm_dcCache;
+#endif
-#define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
-#define twips2mm (1/(METRIC_CONVERSION_CONSTANT*1440))
+ DECLARE_DYNAMIC_CLASS(wxDC)
+ DECLARE_NO_COPY_CLASS(wxDC)
+};
-#define mm2pt (METRIC_CONVERSION_CONSTANT*72)
-#define pt2mm (1/(METRIC_CONVERSION_CONSTANT*72))
+// ----------------------------------------------------------------------------
+// wxDCTemp: a wxDC which doesn't free the given HDC (used by wxWidgets
+// only/mainly)
+// ----------------------------------------------------------------------------
-#define wx_round(a) (int)((a)+.5)
+class WXDLLEXPORT wxDCTemp : public wxDC
+{
+public:
+ wxDCTemp(WXHDC hdc) : wxDC(hdc)
+ {
+ }
+
+ virtual ~wxDCTemp()
+ {
+ // prevent base class dtor from freeing it
+ SetHDC((WXHDC)NULL);
+ }
+
+ virtual void DoGetSize(int *w, int *h) const
+ {
+ wxFAIL_MSG( _T("no way to retrieve the size of generic DC") );
+
+ if ( w )
+ *w = 0;
+ if ( h )
+ *h = 0;
+ }
+
+private:
+ DECLARE_NO_COPY_CLASS(wxDCTemp)
+};
+#endif // _WX_MSW_DC_H_
-#endif
- // _WX_DC_H_
projects / wxWidgets.git / blobdiff