fixed typo

[wxWidgets.git] / docs / latex / wx / dc.tex

diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex
index be5a632c3aa3291ce2475cd6d39bf8bfaa68ddb0..ed4f54fcc9155e6c1d240a9255574ef04b738178 100644 (file)
--- a/docs/latex/wx/dc.tex
+++ b/docs/latex/wx/dc.tex
@@ -61,11 +61,11 @@ released for each drawing operation.
 
 \func{bool}{Blit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
   \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{int}{ logicalFunc = wxCOPY},
 
 \func{bool}{Blit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
   \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{int}{ logicalFunc = wxCOPY},

-  \param{bool }{useMask = FALSE}}
+  \param{bool }{useMask = false}, \param{wxCoord}{ xsrcMask = -1}, \param{wxCoord}{ ysrcMask = -1}}

 
 Copy from a source DC to this DC, specifying the destination
 
 Copy from a source DC to this DC, specifying the destination

-coordinates, size of area to copy, source DC, source coordinates, and
-logical function.
+coordinates, size of area to copy, source DC, source coordinates,
+logical function, whether to use a bitmap mask, and mask source position.

 
 \wxheading{Parameters}
 
 
 \wxheading{Parameters}
 


@@ -85,8 +85,8 @@ logical function.
 
 \docparam{logicalFunc}{Logical function to use: see \helpref{wxDC::SetLogicalFunction}{wxdcsetlogicalfunction}.}
 
 
 \docparam{logicalFunc}{Logical function to use: see \helpref{wxDC::SetLogicalFunction}{wxdcsetlogicalfunction}.}
 

-\docparam{useMask}{If TRUE, Blit does a transparent blit using the mask that is associated with the bitmap
-selected into the source device context. The Windows implementation does the following:
+\docparam{useMask}{If true, Blit does a transparent blit using the mask that is associated with the bitmap
+selected into the source device context. The Windows implementation does the following if MaskBlt cannot be used:

 
 \begin{enumerate}
 \item Creates a temporary bitmap and copies the destination area into it.
 
 \begin{enumerate}
 \item Creates a temporary bitmap and copies the destination area into it.


@@ -103,8 +103,21 @@ and the background colour set to WHITE.
 
 This sequence of operations ensures that the source's transparent area need not be black,
 and logical functions are supported.
 
 This sequence of operations ensures that the source's transparent area need not be black,
 and logical functions are supported.

+
+{\bf Note:} on Windows, blitting with masks can be speeded up considerably by compiling
+wxWindows with the wxUSE\_DC\_CACHE option enabled. You can also influence whether MaskBlt
+or the explicit mask blitting code above is used, by using \helpref{wxSystemOptions}{wxsystemoptions} and
+setting the {\bf no-maskblt} option to 1.
+

 }
 
 }
 

+\docparam{xsrcMask}{Source x position on the mask. If both xsrcMask and ysrcMask are -1, xsrc and ysrc
+will be assumed for the mask source position. Currently only implemented on Windows.}
+
+\docparam{ysrcMask}{Source y position on the mask. If both xsrcMask and ysrcMask are -1, xsrc and ysrc
+will be assumed for the mask source position. Currently only implemented on Windows.}
+
+

 \wxheading{Remarks}
 
 There is partial support for Blit in wxPostScriptDC, under X.
 \wxheading{Remarks}
 
 There is partial support for Blit in wxPostScriptDC, under X.


@@ -115,6 +128,24 @@ See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
 
 \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
 
 
 \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
 

+\begin{comment}
+\membersection{wxDC::CacheEnabled}\label{wxdccacheenabled}
+
+\func{static bool}{CacheEnabled}{\void}
+
+On supported platforms (currently only Windows), returns true
+if the DC cache is enabled. The DC cache
+can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::ClearCache}
+\end{comment}
+

 \membersection{wxDC::CalcBoundingBox}\label{wxdccalcboundingbox}
 
 \func{void}{CalcBoundingBox}{\param{wxCoord }{x}, \param{wxCoord }{y}}
 \membersection{wxDC::CalcBoundingBox}\label{wxdccalcboundingbox}
 
 \func{void}{CalcBoundingBox}{\param{wxCoord }{x}, \param{wxCoord }{y}}


@@ -133,6 +164,26 @@ Adds the specified point to the bounding box which can be retrieved with
 
 Clears the device context using the current background brush.
 
 
 Clears the device context using the current background brush.
 

+\begin{comment}
+\membersection{wxDC::ClearCache}\label{wxdcclearcache}
+
+\func{static void}{ClearCache}{\void}
+
+On supported platforms (currently only Windows), clears
+the contents of the DC cache (one bitmap and two Windows device contexts). The DC cache
+can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps. You should
+call ClearCache at the end of length DC operations if you wish to only use
+the cache transiently; you should also call it as your application exits.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::EnableCache}{wxdcenablecache}, \helpref{wxDC::CacheEnabled}
+\end{comment}
+

 \membersection{wxDC::CrossHair}\label{wxdccrosshair}
 
 \func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
 \membersection{wxDC::CrossHair}\label{wxdccrosshair}
 
 \func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}


@@ -160,7 +211,8 @@ mapping mode.
 \func{wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
 
 Convert device X coordinate to relative logical coordinate, using the current
 \func{wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
 
 Convert device X coordinate to relative logical coordinate, using the current

-mapping mode. Use this function for converting a width, for example.
+mapping mode but ignoring the x axis orientation.
+Use this function for converting a width, for example.

 
 \membersection{wxDC::DeviceToLogicalY}\label{wxdcdevicetologicaly}
 
 
 \membersection{wxDC::DeviceToLogicalY}\label{wxdcdevicetologicaly}
 


@@ -174,7 +226,8 @@ mapping mode.
 \func{wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
 
 Convert device Y coordinate to relative logical coordinate, using the current
 \func{wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
 
 Convert device Y coordinate to relative logical coordinate, using the current

-mapping mode. Use this function for converting a height, for example.
+mapping mode but ignoring the y axis orientation.
+Use this function for converting a height, for example.

 
 \membersection{wxDC::DrawArc}\label{wxdcdrawarc}
 
 
 \membersection{wxDC::DrawArc}\label{wxdcdrawarc}
 


@@ -190,7 +243,7 @@ The arc is drawn in an anticlockwise direction from the start point to the end p
 
 \func{void}{DrawBitmap}{\param{const wxBitmap\&}{ bitmap}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{bool}{ transparent}}
 
 
 \func{void}{DrawBitmap}{\param{const wxBitmap\&}{ bitmap}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{bool}{ transparent}}
 

-Draw a bitmap on the device context at the specified point. If {\it transparent} is TRUE and the bitmap has
+Draw a bitmap on the device context at the specified point. If {\it transparent} is true and the bitmap has

 a transparency mask, the bitmap will be drawn transparently.
 
 When drawing a mono-bitmap, the current text foreground colour will be used to draw the foreground
 a transparency mask, the bitmap will be drawn transparently.
 
 When drawing a mono-bitmap, the current text foreground colour will be used to draw the foreground


@@ -206,13 +259,33 @@ of the bitmap (all bits set to 1), and the current text background colour to dra
 
 Draws a check mark inside the given rectangle.
 
 
 Draws a check mark inside the given rectangle.
 

+\membersection{wxDC::DrawCircle}\label{wxdcdrawcircle}
+
+\func{void}{DrawCircle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ radius}}
+
+\func{void}{DrawCircle}{\param{const wxPoint\&}{ pt}, \param{wxCoord}{ radius}}
+
+Draws a circle with the given centre and radius.
+
+\wxheading{See also}
+
+\helpref{DrawEllipse}{wxdcdrawellipse}
+

 \membersection{wxDC::DrawEllipse}\label{wxdcdrawellipse}
 
 \func{void}{DrawEllipse}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
 
 \membersection{wxDC::DrawEllipse}\label{wxdcdrawellipse}
 
 \func{void}{DrawEllipse}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
 

-Draws an ellipse contained in the rectangle with the given top left corner, and with the
-given size.  The current pen is used for the outline and the current brush for
-filling the shape.
+\func{void}{DrawEllipse}{\param{const wxPoint\&}{ pt}, \param{const wxSize\&}{ size}}
+
+\func{void}{DrawEllipse}{\param{const wxRect\&}{ rect}}
+
+Draws an ellipse contained in the rectangle specified either with the given top
+left corner and the given size or directly. The current pen is used for the
+outline and the current brush for filling the shape.
+
+\wxheading{See also}
+
+\helpref{DrawCircle}{wxdcdrawcircle}

 
 \membersection{wxDC::DrawEllipticArc}\label{wxdcdrawellipticarc}
 
 
 \membersection{wxDC::DrawEllipticArc}\label{wxdcdrawellipticarc}
 


@@ -262,6 +335,10 @@ deleting the list of points.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 

+\perlnote{The wxPerl version of this method accepts 
+  as its first parameter a reference to an array
+  of wxPoint objects.}
+

 \membersection{wxDC::DrawPolygon}\label{wxdcdrawpolygon}
 
 \func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
 \membersection{wxDC::DrawPolygon}\label{wxdcdrawpolygon}
 
 \func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\


@@ -285,6 +362,10 @@ Note that wxWindows automatically closes the first and last points.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 

+\perlnote{The wxPerl version of this method accepts 
+  as its first parameter a reference to an array
+  of wxPoint objects.}
+

 \membersection{wxDC::DrawPoint}\label{wxdcdrawpoint}
 
 \func{void}{DrawPoint}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
 \membersection{wxDC::DrawPoint}\label{wxdcdrawpoint}
 
 \func{void}{DrawPoint}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}


@@ -305,6 +386,11 @@ for filling the shape.
 
 Draws the text rotated by {\it angle} degrees.
 
 
 Draws the text rotated by {\it angle} degrees.
 

+{\bf NB:} Under Win9x only TrueType fonts can be drawn by this function. In
+particular, a font different from {\tt wxNORMAL\_FONT} should be used as the
+latter is not a TrueType font. {\tt wxSWISS\_FONT} is an example of a font
+which is.
+

 \wxheading{See also}
 
 \helpref{DrawText}{wxdcdrawtext}
 \wxheading{See also}
 
 \helpref{DrawText}{wxdcdrawtext}


@@ -342,6 +428,9 @@ Draws a three-point spline using the current pen.
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 
 \pythonnote{The wxPython version of this method accepts a Python list
 of wxPoint objects.}
 

+\perlnote{The wxPerl version of this method accepts a reference to an array
+  of wxPoint objects.}
+

 \membersection{wxDC::DrawText}\label{wxdcdrawtext}
 
 \func{void}{DrawText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
 \membersection{wxDC::DrawText}\label{wxdcdrawtext}
 
 \func{void}{DrawText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}


@@ -359,6 +448,23 @@ text more precisely.
 but it is ignored by wxMSW. Thus, you should avoid using logical functions
 with this function in portable programs.
 
 but it is ignored by wxMSW. Thus, you should avoid using logical functions
 with this function in portable programs.
 

+\begin{comment}
+\membersection{wxDC::EnableCache}\label{wxdcenablecache}
+
+\func{static void}{EnableCache}{\param{bool}{ enableCache}}
+
+On supported platforms (currently only Windows), enables the DC cache
+which can speed up the \helpref{Blit}{wxdcblit} operation when
+drawing a large number of masked bitmaps.
+
+If using the cache functions in your code, please test for the
+wxUSE\_DC\_CACHEING preprocessor symbol for portability.
+
+\wxheading{See also}
+
+\helpref{wxDC::CacheEnabled}{wxdccacheenabled}, \helpref{wxDC::ClearCache}
+\end{comment}
+

 \membersection{wxDC::EndDoc}\label{wxdcenddoc}
 
 \func{void}{EndDoc}{\void}
 \membersection{wxDC::EndDoc}\label{wxdcenddoc}
 
 \func{void}{EndDoc}{\void}


@@ -381,7 +487,7 @@ Ends a document page (only relevant when outputting to a printer).
 
 \membersection{wxDC::FloodFill}\label{wxdcfloodfill}
 
 
 \membersection{wxDC::FloodFill}\label{wxdcfloodfill}
 

-\func{void}{FloodFill}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{const wxColour\&}{ colour}, \param{int}{ style=wxFLOOD\_SURFACE}}
+\func{bool}{FloodFill}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{const wxColour\&}{ colour}, \param{int}{ style=wxFLOOD\_SURFACE}}

 
 Flood fills the device context starting from the given point, using
 the {\it current brush colour}, and using a style:
 
 Flood fills the device context starting from the given point, using
 the {\it current brush colour}, and using a style:


@@ -391,7 +497,11 @@ the {\it current brush colour}, and using a style:
 \item wxFLOOD\_BORDER: the area to be flooded is bounded by the given colour.
 \end{itemize}
 
 \item wxFLOOD\_BORDER: the area to be flooded is bounded by the given colour.
 \end{itemize}
 

-{\it Note:} this function is available in MS Windows only.
+Returns false if the operation failed.
+
+{\it Note:} The present implementation for non-Windows platforms may fail to find
+colour borders if the pixels do not match the colour exactly. However the
+function will still return true.

 
 \membersection{wxDC::GetBackground}\label{wxdcgetbackground}
 
 
 \membersection{wxDC::GetBackground}\label{wxdcgetbackground}
 


@@ -440,6 +550,9 @@ Gets the rectangle surrounding the current clipping region.
 \pythonnote{No arguments are required and the four values defining the
 rectangle are returned as a tuple.}
 
 \pythonnote{No arguments are required and the four values defining the
 rectangle are returned as a tuple.}
 

+\perlnote{This method takes no arguments and returns a four element list
+{\tt ( x, y, width, height )}}
+

 \membersection{wxDC::GetFont}\label{wxdcgetfont}
 
 \func{wxFont\&}{GetFont}{\void}
 \membersection{wxDC::GetFont}\label{wxdcgetfont}
 
 \func{wxFont\&}{GetFont}{\void}


@@ -464,7 +577,7 @@ Gets the {\it mapping mode} for the device context (see \helpref{wxDC::SetMapMod
 
 \func{bool}{GetOptimization}{\void}
 
 
 \func{bool}{GetOptimization}{\void}
 

-Returns TRUE if device context optimization is on.
+Returns true if device context optimization is on.

 See \helpref{wxDC::SetOptimization}{wxsetoptimization} for details.
 
 \membersection{wxDC::GetPen}\label{wxdcgetpen}
 See \helpref{wxDC::SetOptimization}{wxsetoptimization} for details.
 
 \membersection{wxDC::GetPen}\label{wxdcgetpen}


@@ -485,6 +598,9 @@ is being worked on. Not available for wxPostScriptDC or wxMetafileDC.
 \pythonnote{For wxPython the wxColour value is returned and is not
 required as a parameter.}
 
 \pythonnote{For wxPython the wxColour value is returned and is not
 required as a parameter.}
 

+\perlnote{This method only takes the parameters {\tt x} and {\tt y} and returns
+a Wx::Colour value}
+

 \membersection{wxDC::GetSize}\label{wxdcgetsize}
 
 \func{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
 \membersection{wxDC::GetSize}\label{wxdcgetsize}
 
 \func{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}


@@ -515,6 +631,14 @@ implements the following methods:\par
 \end{twocollist}}
 }
 
 \end{twocollist}}
 }
 

+\perlnote{In place of a single overloaded method, wxPerl uses:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf GetSize()}}{Returns a Wx::Size}
+\twocolitem{{\bf GetSizeWH()}}{Returns a 2-element list
+  {\tt ( width, height )}}
+\end{twocollist}
+}}
+

 \membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
 
 \func{wxColour\&}{GetTextBackground}{\void}
 \membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
 
 \func{wxColour\&}{GetTextBackground}{\void}


@@ -550,6 +674,11 @@ See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
 \end{twocollist}}
 }
 
 \end{twocollist}}
 }
 

+\perlnote{In wxPerl this method is implemented as 
+  {\bf GetTextExtent( string, font = undef )} returning a four element
+  array {\tt ( width, height, descent, externalLeading )}
+}
+

 \membersection{wxDC::GetTextForeground}\label{wxdcgettextforeground}
 
 \func{wxColour\&}{GetTextForeground}{\void}
 \membersection{wxDC::GetTextForeground}\label{wxdcgettextforeground}
 
 \func{wxColour\&}{GetTextForeground}{\void}


@@ -565,6 +694,8 @@ Gets the current text foreground colour (see \helpref{wxDC::SetTextForeground}{w
 
 Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetuserscale}).
 
 
 Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetuserscale}).
 

+\perlnote{In wxPerl this method takes no arguments and return a two element
+ array {\tt ( x, y )}}

 
 \membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
 
 
 \membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
 


@@ -578,7 +709,8 @@ mapping mode.
 \func{wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
 
 Converts logical X coordinate to relative device coordinate, using the current
 \func{wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
 
 Converts logical X coordinate to relative device coordinate, using the current

-mapping mode. Use this for converting a width, for example.
+mapping mode but ignoring the x axis orientation.
+Use this for converting a width, for example.

 
 \membersection{wxDC::LogicalToDeviceY}\label{wxdclogicaltodevicey}
 
 
 \membersection{wxDC::LogicalToDeviceY}\label{wxdclogicaltodevicey}
 


@@ -592,7 +724,8 @@ mapping mode.
 \func{wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
 
 Converts logical Y coordinate to relative device coordinate, using the current
 \func{wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
 
 Converts logical Y coordinate to relative device coordinate, using the current

-mapping mode. Use this for converting a height, for example.
+mapping mode but ignoring the y axis orientation.
+Use this for converting a height, for example.

 
 \membersection{wxDC::MaxX}\label{wxdcmaxx}
 
 
 \membersection{wxDC::MaxX}\label{wxdcmaxx}
 


@@ -622,7 +755,7 @@ Gets the minimum vertical extent used in drawing commands so far.
 
 \func{bool}{Ok}{\void}
 
 
 \func{bool}{Ok}{\void}
 

-Returns TRUE if the DC is ok to use.
+Returns true if the DC is ok to use.

 
 \membersection{wxDC::ResetBoundingBox}\label{wxdcresetboundingbox}
 
 
 \membersection{wxDC::ResetBoundingBox}\label{wxdcresetboundingbox}
 


@@ -635,6 +768,23 @@ doesn't contain anything.
 
 \helpref{CalcBoundingBox}{wxdccalcboundingbox}
 
 
 \helpref{CalcBoundingBox}{wxdccalcboundingbox}
 

+\membersection{wxDC::SetAxisOrientation}\label{wxdcsetaxisorientation}
+
+\func{void}{SetAxisOrientation}{\param{bool}{ xLeftRight},
+                                \param{bool}{ yBottomUp}}
+
+Sets the x and y axis orientation (i.e., the direction from lowest to
+highest values on the axis). The default orientation is the natural
+orientation, e.g. x axis from left to right and y axis from bottom up.
+
+\wxheading{Parameters}
+
+\docparam{xLeftRight}{True to set the x axis orientation to the natural
+left to right orientation, false to invert it.}
+
+\docparam{yBottomUp}{True to set the y axis orientation to the natural
+bottom up orientation, false to invert it.}
+

 \membersection{wxDC::SetDeviceOrigin}\label{wxdcsetdeviceorigin}
 
 \func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
 \membersection{wxDC::SetDeviceOrigin}\label{wxdcsetdeviceorigin}
 
 \func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}


@@ -662,11 +812,21 @@ whether text will be drawn with a background colour or not.
 
 \func{void}{SetClippingRegion}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
 
 
 \func{void}{SetClippingRegion}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
 

+\func{void}{SetClippingRegion}{\param{const wxPoint\& }{pt}, \param{const wxSize\& }{sz}}
+
+\func{void}{SetClippingRegion}{\param{const wxRect\&}{ rect}}
+

 \func{void}{SetClippingRegion}{\param{const wxRegion\&}{ region}}
 
 \func{void}{SetClippingRegion}{\param{const wxRegion\&}{ region}}
 

-Sets the clipping region for the DC. The clipping region is an area
-to which drawing is restricted. Possible uses for the clipping region are for clipping text
-or for speeding up window redraws when only a known area of the screen is damaged.
+Sets the clipping region for this device context to the intersection of the
+given region described by the parameters of this method and the previously set
+clipping region. You should call 
+\helpref{DestroyClippingRegion}{wxdcdestroyclippingregion} if you want to set
+the clipping region exactly to the region specified.
+
+The clipping region is an area to which drawing is restricted. Possible uses
+for the clipping region are for clipping text or for speeding up window redraws
+when only a known area of the screen is damaged.

 
 \wxheading{See also}
 
 
 \wxheading{See also}
 


@@ -702,11 +862,8 @@ when drawing into a monochrome bitmap.
 
 \func{void}{SetFont}{\param{const wxFont\& }{font}}
 
 
 \func{void}{SetFont}{\param{const wxFont\& }{font}}
 

-Sets the current font for the DC.
-
-If the argument is wxNullFont, the current font is selected out of the device
-context, and the original font restored, allowing the current font to
-be destroyed safely.
+Sets the current font for the DC. It must be a valid font, in particular you
+should not pass {\tt wxNullFont} to this method.

 
 See also \helpref{wxFont}{wxfont}.
 
 
 See also \helpref{wxFont}{wxfont}.
 


@@ -756,7 +913,7 @@ measurement used to convert logical units to device units. Note that
 in X, text drawing isn't handled consistently with the mapping mode; a
 font is always specified in point size. However, setting the {\it
 user scale} (see \helpref{wxDC::SetUserScale}{wxdcsetuserscale}) scales the text appropriately. In
 in X, text drawing isn't handled consistently with the mapping mode; a
 font is always specified in point size. However, setting the {\it
 user scale} (see \helpref{wxDC::SetUserScale}{wxdcsetuserscale}) scales the text appropriately. In

-Windows, scaleable TrueType fonts are always used; in X, results depend
+Windows, scalable TrueType fonts are always used; in X, results depend

 on availability of fonts, but usually a reasonable match is found.
 
 Note that the coordinate origin should ideally be selectable, but for
 on availability of fonts, but usually a reasonable match is found.
 
 Note that the coordinate origin should ideally be selectable, but for


@@ -781,7 +938,7 @@ The mapping mode can be one of the following:
 
 \func{void}{SetOptimization}{\param{bool }{optimize}}
 
 
 \func{void}{SetOptimization}{\param{bool }{optimize}}
 

-If {\it optimize} is TRUE (the default), this function sets optimization mode on.
+If {\it optimize} is true (the default), this function sets optimization mode on.

 This currently means that under X, the device context will not try to set a pen or brush
 property if it is known to be set already. This approach can fall down
 if non-wxWindows code is using the same device context or window, for example
 This currently means that under X, the device context will not try to set a pen or brush
 property if it is known to be set already. This approach can fall down
 if non-wxWindows code is using the same device context or window, for example


@@ -838,3 +995,38 @@ Message is a message to show whilst printing.
 
 Starts a document page (only relevant when outputting to a printer).
 
 
 Starts a document page (only relevant when outputting to a printer).
 

+\section{\class{wxDCClipper}}\label{wxdcclipper}
+
+This is a small helper class which sets the specified to its constructor
+clipping region and then automatically destroys it in its destructor. Using
+it ensures that unwanted clipping region is not left set on the DC.
+
+\wxheading{Derived from}
+
+No base class
+
+\wxheading{Include files}
+
+<wx/dc.h>
+
+\wxheading{See also}
+
+\helpref{wxDC}{wxdc}
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxDCClipper::wxDCClipper}
+
+\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{wxCoord }{x},\param{wxCoord }{y},\param{wxCoord }{w},\param{wxCoord }{h},}
+
+\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{const wxRect\&}{ rect}}
+
+Constructor: sets the the clipping region for the given device context to the
+specified rectangle.
+
+\membersection{wxDCClipper::\destruct{wxDCClipper}}
+
+\func{}{\destruct{wxDCClipper}}{\void}
+
+Destructor: destroys the clipping region set in the constructor.
+