/////////////////////////////////////////////////////////////////////////////
-// 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_
-#ifdef __GNUG__
- #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;
class WXDLLEXPORT wxDrawObject
public:
wxDrawObject()
- {
- ResetBoundingBox();
- }
+ : m_isBBoxValid(false)
+ , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
+ { }
virtual ~wxDrawObject() { }
}
else
{
- m_isBBoxValid = TRUE;
+ m_isBBoxValid = true;
m_minX = x;
m_minY = y;
void ResetBoundingBox()
{
- m_isBBoxValid = FALSE;
+ m_isBBoxValid = false;
m_minX = m_maxX = m_minY = m_maxY = 0;
}
// global variables
// ---------------------------------------------------------------------------
-WXDLLEXPORT_DATA(extern int) wxPageNumber;
-
// ---------------------------------------------------------------------------
// wxDC is the device context - object on which any drawing is done
// ---------------------------------------------------------------------------
{
public:
wxDCBase()
+ : m_colour(wxColourDisplay())
+ , m_ok(true)
+ , m_clipping(false)
+ , m_isInteractive(0)
+ , m_isBBoxValid(false)
+ , m_logicalOriginX(0), m_logicalOriginY(0)
+ , m_deviceOriginX(0), m_deviceOriginY(0)
+ , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
+ , m_userScaleX(1.0), m_userScaleY(1.0)
+ , m_scaleX(1.0), m_scaleY(1.0)
+ , m_signX(1), m_signY(1)
+ , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
+ , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0)
+ , m_logicalFunction(wxCOPY)
+ , m_backgroundMode(wxTRANSPARENT)
+ , m_mappingMode(wxMM_TEXT)
+ , m_pen()
+ , m_brush()
+ , m_backgroundBrush(*wxTRANSPARENT_BRUSH)
+ , m_textForegroundColour(*wxBLACK)
+ , m_textBackgroundColour(*wxWHITE)
+ , m_font()
+#if wxUSE_PALETTE
+ , m_palette()
+ , m_hasCustomPalette(false)
+#endif // wxUSE_PALETTE
{
- m_clipping = FALSE;
- m_ok = TRUE;
-
ResetBoundingBox();
-
- m_signX = m_signY = 1;
-
- m_logicalOriginX = m_logicalOriginY =
- m_deviceOriginX = m_deviceOriginY = 0;
-
- m_logicalScaleX = m_logicalScaleY =
- m_userScaleX = m_userScaleY =
- m_scaleX = m_scaleY = 1.0;
-
- m_logicalFunction = wxCOPY;
-
- m_backgroundMode = wxTRANSPARENT;
-
- m_mappingMode = wxMM_TEXT;
-
- m_backgroundBrush = *wxTRANSPARENT_BRUSH;
-
- m_textForegroundColour = *wxBLACK;
- m_textBackgroundColour = *wxWHITE;
-
- m_colour = wxColourDisplay();
+ ResetClipping();
}
- ~wxDCBase() { }
-
- virtual void BeginDrawing() { }
- virtual void EndDrawing() { }
+ virtual ~wxDCBase() { }
// graphic primitives
// ------------------
CalcBoundingBox(drawobject->MaxX(),drawobject->MaxY());
}
- void FloodFill(wxCoord x, wxCoord y, const wxColour& col,
+ bool FloodFill(wxCoord x, wxCoord y, const wxColour& col,
int style = wxFLOOD_SURFACE)
- { DoFloodFill(x, y, col, style); }
- void FloodFill(const wxPoint& pt, const wxColour& col,
+ { return DoFloodFill(x, y, col, style); }
+ bool FloodFill(const wxPoint& pt, const wxColour& col,
int style = wxFLOOD_SURFACE)
- { DoFloodFill(pt.x, pt.y, col, style); }
+ { 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); }
wxCoord xoffset = 0, wxCoord yoffset = 0,
int fillStyle = wxODDEVEN_RULE);
+ void DrawPolyPolygon(int n, int count[], wxPoint points[],
+ wxCoord xoffset = 0, wxCoord yoffset = 0,
+ int fillStyle = wxODDEVEN_RULE)
+ { DoDrawPolyPolygon(n, count, points, xoffset, yoffset, fillStyle); }
+
void DrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{ DoDrawRectangle(x, y, width, height); }
void DrawRectangle(const wxPoint& pt, const wxSize& sz)
void DrawCircle(wxCoord x, wxCoord y, wxCoord radius)
{ DoDrawEllipse(x - radius, y - radius, 2*radius, 2*radius); }
+ void DrawCircle(const wxPoint& pt, wxCoord radius)
+ { DrawCircle(pt.x, pt.y, radius); }
+
void DrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{ DoDrawEllipse(x, y, width, height); }
void DrawEllipse(const wxPoint& pt, const wxSize& sz)
{ 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)
bool Blit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
wxDC *source, wxCoord xsrc, wxCoord ysrc,
- int rop = wxCOPY, bool useMask = FALSE)
+ int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord)
{
return DoBlit(xdest, ydest, width, height,
- source, xsrc, ysrc, rop, useMask);
+ 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)
+ 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);
+ source, srcPt.x, srcPt.y, rop, useMask, srcPtMask.x, srcPtMask.y);
+ }
+
+ wxBitmap GetAsBitmap(const wxRect *subrect = (const wxRect *) NULL) const
+ {
+ return DoGetAsBitmap(subrect);
}
#if wxUSE_SPLINES
void DrawSpline(wxList *points) { DoDrawSpline(points); }
#endif // wxUSE_SPLINES
+ // Eventually we will have wxUSE_GENERIC_DRAWELLIPSE
+#ifdef __WXWINCE__
+ //! Generic method to draw ellipses, circles and arcs with current pen and brush.
+ /*! \param x Upper left corner of bounding box.
+ * \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
+ * (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
+ * calculating begin and end.
+ */
+ 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,
+ const wxSize& sz,
+ double sa = 0, double ea = 0, double angle = 0 )
+ { DoDrawEllipticArcRot( pt.x, pt.y, sz.x, sz.y, sa, ea, angle ); }
+
+ void DrawEllipticArcRot( const wxRect& rect,
+ 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,
+ 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(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,
+ 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
// ------------------------------
virtual void SetBrush(const wxBrush& brush) = 0;
virtual void SetBackground(const wxBrush& brush) = 0;
virtual void SetBackgroundMode(int mode) = 0;
+#if wxUSE_PALETTE
virtual void SetPalette(const wxPalette& palette) = 0;
+#endif // wxUSE_PALETTE
// clipping region
// ---------------
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
{
- // Necessary to use intermediate variables for 16-bit compilation
- wxCoord x, y, w, h;
- DoGetClippingBox(&x, &y, &w, &h);
- rect.x = x; rect.y = y; rect.width = w; rect.height = h;
+ DoGetClippingBox(&rect.x, &rect.y, &rect.width, &rect.height);
}
// text extent
wxCoord *heightLine = NULL,
wxFont *font = NULL);
+ // Measure cumulative width of text after each character
+ bool GetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+ { return DoGetPartialTextExtents(text, widths); }
+
+
// size and resolution
// -------------------
// Resolution in Pixels per inch
virtual wxSize GetPPI() const = 0;
- virtual bool Ok() const { return m_ok; }
+ virtual bool Ok() const { return IsOk(); }
+ virtual bool IsOk() const { return m_ok; }
- // accessors
- // ---------
-
- // 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
{ 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?
+#if WXWIN_COMPATIBILITY_2_4
virtual void SetOptimization(bool WXUNUSED(opt)) { }
- virtual bool GetOptimization() { return FALSE; }
+ virtual bool GetOptimization() { return false; }
+#endif
// bounding box
// ------------
}
else
{
- m_isBBoxValid = TRUE;
+ m_isBBoxValid = true;
m_minX = x;
m_minY = y;
void ResetBoundingBox()
{
- m_isBBoxValid = FALSE;
+ m_isBBoxValid = false;
m_minX = m_maxX = m_minY = m_maxY = 0;
}
// ------------------
// 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,
if (w) *w = ww;
if (h) *h = hh;
}
-#endif // !Win16
-#if WXWIN_COMPATIBILITY
- virtual void SetColourMap(const wxPalette& palette) { SetPalette(palette); }
- void GetTextExtent(const wxString& string, float *x, float *y,
- float *descent = NULL, float *externalLeading = NULL,
- wxFont *theFont = NULL, bool use16bit = FALSE) const ;
- void GetSize(float* width, float* height) const { int w, h; GetSize(& w, & h); *width = w; *height = h; }
- void GetSizeMM(float *width, float *height) const { long w, h; GetSizeMM(& w, & h); *width = (float) w; *height = (float) h; }
-#endif // WXWIN_COMPATIBILITY
+ // 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 void DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
+ 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;
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,
virtual bool DoBlit(wxCoord xdest, wxCoord ydest,
wxCoord width, wxCoord height,
wxDC *source, wxCoord xsrc, wxCoord ysrc,
- int rop = wxCOPY, bool useMask = FALSE) = 0;
+ int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = wxDefaultCoord, wxCoord ysrcMask = wxDefaultCoord) = 0;
+
+ 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;
virtual void DoDrawPolygon(int n, wxPoint points[],
wxCoord xoffset, wxCoord yoffset,
int fillStyle = wxODDEVEN_RULE) = 0;
+ virtual void DoDrawPolyPolygon(int n, int count[], wxPoint points[],
+ wxCoord xoffset, wxCoord yoffset,
+ int fillStyle);
virtual void DoSetClippingRegionAsRegion(const wxRegion& region) = 0;
virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
wxCoord width, wxCoord height) = 0;
- // FIXME are these functions really different?
+#if WXWIN_COMPATIBILITY_2_4
+ // this was only for confusing people, use DoGetClippingBox only
virtual void DoGetClippingRegion(wxCoord *x, wxCoord *y,
wxCoord *w, wxCoord *h)
{ DoGetClippingBox(x, y, w, h); }
+#endif
+
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
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;
wxColour m_textForegroundColour;
wxColour m_textBackgroundColour;
wxFont m_font;
+
+#if wxUSE_PALETTE
wxPalette m_palette;
+ bool m_hasCustomPalette;
+#endif // wxUSE_PALETTE
private:
DECLARE_NO_COPY_CLASS(wxDCBase)
// 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(__WXQT__)
- #include "wx/qt/dc.h"
+#elif defined(__WXDFB__)
+ #include "wx/dfb/dc.h"
#elif defined(__WXMAC__)
#include "wx/mac/dc.h"
+#elif defined(__WXCOCOA__)
+ #include "wx/cocoa/dc.h"
#elif defined(__WXPM__)
#include "wx/os2/dc.h"
-#elif defined(__WXSTUBS__)
- #include "wx/stubs/dc.h"
+#endif
+
+#if wxUSE_GRAPHICS_CONTEXT
+ #include "wx/dcgraph.h"
#endif
// ----------------------------------------------------------------------------
class WXDLLEXPORT wxDCTextColourChanger
{
public:
- wxDCTextColourChanger(wxDC& dc) : m_dc(dc) { }
+ wxDCTextColourChanger(wxDC& dc) : m_dc(dc), m_colFgOld() { }
+
+ wxDCTextColourChanger(wxDC& dc, const wxColour& col) : m_dc(dc)
+ {
+ Set(col);
+ }
~wxDCTextColourChanger()
{
wxDC& m_dc;
wxColour m_colFgOld;
+
+ DECLARE_NO_COPY_CLASS(wxDCTextColourChanger)
};
-#endif
- // _WX_DC_H_BASE_
+// ----------------------------------------------------------------------------
+// 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
+// ----------------------------------------------------------------------------
+
+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)
+ { dc.SetClippingRegion(x, y, w, h); }
+
+ ~wxDCClipper() { m_dc.DestroyClippingRegion(); }
+
+private:
+ wxDC& m_dc;
+
+ DECLARE_NO_COPY_CLASS(wxDCClipper)
+};
+
+#endif // _WX_DC_H_BASE_
projects / wxWidgets.git / blobdiff