X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/85d03040fc18f7e403720c77ce758e1f12e14292..f1e7793361bb0106611e5d1373b4e1e6ed30f14f:/docs/latex/wx/dc.tex

diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex
index 7a5069793e..d609a8eaec 100644
--- a/docs/latex/wx/dc.tex
+++ b/docs/latex/wx/dc.tex
@@ -9,6 +9,13 @@ if the device context is used as a parameter.
 Derived types of wxDC have documentation for specific features
 only, so refer to this section for most device context information.
 
+% VZ: we should really document them instead of this lame excuse, but I don't
+%     have time for it now, when it is done please remove this
+Please note that in addition to the versions of the methods documented here,
+there are also versions which accept single {\tt wxPoint} parameter instead of
+two {\tt wxCoord} ones or {\tt wxPoint} and {\tt wxSize} instead of four of
+them.
+
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}
@@ -23,18 +30,21 @@ only, so refer to this section for most device context information.
 
 \latexignore{\rtfignore{\wxheading{Members}}}
 
+
 \membersection{wxDC::wxDC}
 
 \func{}{wxDC}{\void}
 
 Constructor.
 
+
 \membersection{wxDC::\destruct{wxDC}}
 
 \func{}{\destruct{wxDC}}{\void}
 
 Destructor.
 
+
 \membersection{wxDC::BeginDrawing}\label{wxdcbegindrawing}
 
 \func{void}{BeginDrawing}{\void}
@@ -50,15 +60,16 @@ a retained device context associated with it, and selections such as pen
 and brush settings would be lost if the device context were obtained and
 released for each drawing operation.
 
+
 \membersection{wxDC::Blit}\label{wxdcblit}
 
 \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
-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}
 
@@ -78,8 +89,8 @@ logical function.
 
 \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.
@@ -96,8 +107,21 @@ 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.
+
+{\bf Note:} on Windows, blitting with masks can be speeded up considerably by compiling
+wxWidgets 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.
@@ -108,6 +132,26 @@ See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
 
 \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}}
@@ -120,12 +164,35 @@ Adds the specified point to the bounding box which can be retrieved with
 
 \helpref{ResetBoundingBox}{wxdcresetboundingbox}
 
+
 \membersection{wxDC::Clear}\label{wxdcclear}
 
 \func{void}{Clear}{\void}
 
 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}}
@@ -134,6 +201,7 @@ Displays a cross hair using the current pen. This is a vertical
 and horizontal line the height and width of the window, centred
 on the given point.
 
+
 \membersection{wxDC::DestroyClippingRegion}\label{wxdcdestroyclippingregion}
 
 \func{void}{DestroyClippingRegion}{\void}
@@ -141,6 +209,7 @@ on the given point.
 Destroys the current clipping region so that none of the DC is clipped.
 See also \helpref{wxDC::SetClippingRegion}{wxdcsetclippingregion}.
 
+
 \membersection{wxDC::DeviceToLogicalX}\label{wxdcdevicetologicalx}
 
 \func{wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
@@ -148,12 +217,15 @@ See also \helpref{wxDC::SetClippingRegion}{wxdcsetclippingregion}.
 Convert device X coordinate to logical coordinate, using the current
 mapping mode.
 
+
 \membersection{wxDC::DeviceToLogicalXRel}\label{wxdcdevicetologicalxrel}
 
 \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}
 
@@ -162,16 +234,19 @@ mapping mode. Use this function for converting a width, for example.
 Converts device Y coordinate to logical coordinate, using the current
 mapping mode.
 
+
 \membersection{wxDC::DeviceToLogicalYRel}\label{wxdcdevicetologicalyrel}
 
 \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}
 
-\func{void}{DrawArc}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{double}{ xc}, \param{double}{ yc}}
+\func{void}{DrawArc}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{wxCoord}{ xc}, \param{wxCoord}{ yc}}
 
 Draws an arc of a circle, centred on ({\it xc, yc}), with starting point ({\it x1, y1})
 and ending at ({\it x2, y2}).   The current pen is used for the outline
@@ -179,11 +254,12 @@ and the current brush for filling the shape.
 
 The arc is drawn in an anticlockwise direction from the start point to the end point.
 
+
 \membersection{wxDC::DrawBitmap}\label{wxdcdrawbitmap}
 
 \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
@@ -191,6 +267,7 @@ of the bitmap (all bits set to 1), and the current text background colour to dra
 (all bits set to 0). See also \helpref{SetTextForeground}{wxdcsettextforeground}, 
 \helpref{SetTextBackground}{wxdcsettextbackground} and \helpref{wxMemoryDC}{wxmemorydc}.
 
+
 \membersection{wxDC::DrawCheckMark}\label{wxdcdrawcheckmark}
 
 \func{void}{DrawCheckMark}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
@@ -199,13 +276,36 @@ of the bitmap (all bits set to 1), and the current text background colour to dra
 
 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}}
 
-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}
 
@@ -213,8 +313,7 @@ filling the shape.
  \param{double}{ start}, \param{double}{ end}}
 
 Draws an arc of an ellipse. The current pen is used for drawing the arc and
-the current brush is used for drawing the pie. This function is currently only available for
-X window and PostScript device contexts.
+the current brush is used for drawing the pie.
 
 {\it x} and {\it y} specify the x and y coordinates of the upper-left corner of the rectangle that contains
 the ellipse.
@@ -228,6 +327,7 @@ in degrees (360 is a complete circle). Positive values mean
 counter-clockwise motion. If {\it start} is equal to {\it end}, a
 complete ellipse will be drawn.
 
+
 \membersection{wxDC::DrawIcon}\label{wxdcdrawicon}
 
 \func{void}{DrawIcon}{\param{const wxIcon\&}{ icon}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
@@ -235,12 +335,16 @@ complete ellipse will be drawn.
 Draw an icon on the display (does nothing if the device context is PostScript).
 This can be the simplest way of drawing bitmaps on a window.
 
+
 \membersection{wxDC::DrawLine}\label{wxdcdrawline}
 
 \func{void}{DrawLine}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}}
 
 Draws a line from the first point to the second. The current pen is used
-for drawing the line.
+for drawing the line. Note that the point $(x2, y2)$ is {\emph not} part of the
+line and is not drawn by this function (this is consistent with the behaviour
+of many other toolkits).
+
 
 \membersection{wxDC::DrawLines}\label{wxdcdrawlines}
 
@@ -256,6 +360,11 @@ deleting the list of points.
 \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},\\
@@ -274,17 +383,55 @@ The current pen is used for drawing the outline, and the current brush
 for filling the shape.  Using a transparent brush suppresses filling.
 The programmer is responsible for deleting the list of points.
 
-Note that wxWindows automatically closes the first and last points.
+Note that wxWidgets automatically closes the first and last points.
 
 \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::DrawPolyPolygon}\label{wxdcdrawpolypolygon}
+
+\func{void}{DrawPolyPolygon}{\param{int}{ n}, \param{int}{ count[]}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
+  \param{int }{fill\_style = wxODDEVEN\_RULE}}
+
+Draws two or more filled polygons using an array of {\it points}, adding the
+optional offset coordinates.
+
+Notice that for the platforms providing a native implementation
+of this function (Windows and PostScript-based wxDC currently), this is more
+efficient than using \helpref{DrawPolygon}{wxdcdrawpolygon} in a loop.
+
+{\it n} specifies the number of polygons to draw, the array {\it count} of size 
+{\it n} specifies the number of points in each of the polygons in the 
+{\it points} array.
+
+The last argument specifies the fill rule: {\bf wxODDEVEN\_RULE} (the default)
+or {\bf wxWINDING\_RULE}.
+
+The current pen is used for drawing the outline, and the current brush for
+filling the shape.  Using a transparent brush suppresses filling.
+
+The polygons maybe disjoint or overlapping. Each polygon specified in a call to
+{\bf DrawPolyPolygon} must be closed. Unlike polygons created by the
+\helpref{DrawPolygon}{wxdcdrawpolygon} member function, the polygons created by
+{\bf DrawPolyPolygon} are not closed automatically.
+
+\pythonnote{Not implemented yet}
+
+\perlnote{Not implemented yet}
+
+
 \membersection{wxDC::DrawPoint}\label{wxdcdrawpoint}
 
 \func{void}{DrawPoint}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
 
 Draws a point using the current pen.
 
+
 \membersection{wxDC::DrawRectangle}\label{wxdcdrawrectangle}
 
 \func{void}{DrawRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
@@ -293,16 +440,23 @@ Draws a 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.
 
+
 \membersection{wxDC::DrawRotatedText}\label{wxdcdrawrotatedtext}
 
 \func{void}{DrawRotatedText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{double}{ angle}}
 
 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}
 
+
 \membersection{wxDC::DrawRoundedRectangle}\label{wxdcdrawroundedrectangle}
 
 \func{void}{DrawRoundedRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{double}{ radius = 20}}
@@ -320,6 +474,7 @@ a sensible size relative to the size of the rectangle, and also avoids
 the strange effects X produces when the corners are too big for
 the rectangle.
 
+
 \membersection{wxDC::DrawSpline}\label{wxdcdrawspline}
 
 \func{void}{DrawSpline}{\param{wxList *}{points}}
@@ -336,6 +491,10 @@ Draws a three-point spline using the current pen.
 \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}}
@@ -353,12 +512,32 @@ text more precisely.
 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}
 
 Ends a document (only relevant when outputting to a printer).
 
+
 \membersection{wxDC::EndDrawing}\label{wxdcenddrawing}
 
 \func{void}{EndDrawing}{\void}
@@ -367,25 +546,32 @@ Allows optimization of drawing code under MS Windows. Enclose
 drawing primitives between {\bf BeginDrawing} and {\bf EndDrawing}\rtfsp
 calls.
 
+
 \membersection{wxDC::EndPage}\label{wxdcendpage}
 
 \func{void}{EndPage}{\void}
 
 Ends a document page (only relevant when outputting to a printer).
 
+
 \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, in the given 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:
 
 \begin{itemize}\itemsep=0pt
 \item wxFLOOD\_SURFACE: the flooding occurs until a colour other than the given colour is encountered.
 \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}
 
@@ -395,6 +581,7 @@ and using a style:
 
 Gets the brush used for painting the background (see \helpref{wxDC::SetBackground}{wxdcsetbackground}).
 
+
 \membersection{wxDC::GetBackgroundMode}\label{wxdcgetbackgroundmode}
 
 \constfunc{int}{GetBackgroundMode}{\void}
@@ -405,6 +592,7 @@ Returns the current background mode: {\tt wxSOLID} or {\tt wxTRANSPARENT}.
 
 \helpref{SetBackgroundMode}{wxdcsetbackgroundmode}
 
+
 \membersection{wxDC::GetBrush}\label{wxdcgetbrush}
 
 \func{wxBrush\&}{GetBrush}{\void}
@@ -413,18 +601,21 @@ Returns the current background mode: {\tt wxSOLID} or {\tt wxTRANSPARENT}.
 
 Gets the current brush (see \helpref{wxDC::SetBrush}{wxdcsetbrush}).
 
+
 \membersection{wxDC::GetCharHeight}\label{wxdcgetcharheight}
 
 \func{wxCoord}{GetCharHeight}{\void}
 
 Gets the character height of the currently set font.
 
+
 \membersection{wxDC::GetCharWidth}\label{wxdcgetcharwidth}
 
 \func{wxCoord}{GetCharWidth}{\void}
 
 Gets the average character width of the currently set font.
 
+
 \membersection{wxDC::GetClippingBox}\label{wxdcgetclippingbox}
 
 \func{void}{GetClippingBox}{\param{wxCoord}{ *x}, \param{wxCoord}{ *y}, \param{wxCoord}{ *width}, \param{wxCoord}{ *height}}
@@ -434,6 +625,10 @@ 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.}
 
+\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}
@@ -442,25 +637,45 @@ rectangle are returned as a tuple.}
 
 Gets the current font (see \helpref{wxDC::SetFont}{wxdcsetfont}).
 
+
 \membersection{wxDC::GetLogicalFunction}\label{wxdcgetlogicalfunction}
 
 \func{int}{GetLogicalFunction}{\void}
 
 Gets the current logical function (see \helpref{wxDC::SetLogicalFunction}{wxdcsetlogicalfunction}).
 
+
 \membersection{wxDC::GetMapMode}\label{wxdcgetmapmode}
 
 \func{int}{GetMapMode}{\void}
 
 Gets the {\it mapping mode} for the device context (see \helpref{wxDC::SetMapMode}{wxdcsetmapmode}).
 
+
 \membersection{wxDC::GetOptimization}\label{wxdcgetoptimization}
 
 \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::GetPartialTextExtents}\label{wxdcgetpartialtextextents}
+
+\constfunc{bool}{GetPartialTextExtents}{\param{const wxString\&  }{text}, 
+\param{wxArrayInt\& }{widths}}
+
+Fills the {\it widths} array with the widths from the begining of 
+{\it text} to the coresponding character of {\it text}.  The generic
+version simply builds a running total of the widths of each character
+using \helpref{GetTextExtent}{wxdcgettextextent}, however if the
+various platforms have a native API function that is faster or more
+accurate than the generic implementaiton then it should be used
+instead. 
+
+\pythonnote{This method only takes the {\it text} parameter and
+  returns a Python list of integers.}
+
 \membersection{wxDC::GetPen}\label{wxdcgetpen}
 
 \func{wxPen\&}{GetPen}{\void}
@@ -473,22 +688,29 @@ Gets the current pen (see \helpref{wxDC::SetPen}{wxdcsetpen}).
 
 \func{bool}{GetPixel}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxColour *}{colour}}
 
-Sets {\it colour} to the colour at the specified location. Windows only; an X implementation
-is being worked on. Not available for wxPostScriptDC or wxMetafileDC.
+Sets {\it colour} to the colour at the specified location.
+Not available for wxPostScriptDC or wxMetafileDC.
 
 \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::GetPPI}\label{wxdcgetppi}
+
+\constfunc{wxSize}{GetPPI}{\void}
+
+Returns the resolution of the device in pixels per inch.
+
 \membersection{wxDC::GetSize}\label{wxdcgetsize}
 
-\func{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
+\constfunc{void}{GetSize}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
 
-For a PostScript device context, this gets the maximum size of graphics
-drawn so far on the device context.
+\constfunc{wxSize}{GetSize}{\void}
 
-For a Windows printer device context, this gets the horizontal and vertical
-resolution. It can be used to scale graphics to fit the page when using
-a Windows printer device context. For example, if {\it maxX} and {\it maxY}\rtfsp
+This gets the horizontal and vertical resolution in device units. It can be used to scale graphics to fit the page.
+For example, if {\it maxX} and {\it maxY}\rtfsp
 represent the maximum horizontal and vertical `pixel' values used in your
 application, the following code will scale the graphic to fit on the
 printer page:
@@ -509,6 +731,22 @@ implements the following methods:\par
 \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::GetSizeMM}\label{wxdcgetsizemm}
+
+\constfunc{void}{GetSizeMM}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
+
+\constfunc{wxSize}{GetSizeMM}{\void}
+
+Returns the horizontal and vertical resolution in millimetres.
+
 \membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
 
 \func{wxColour\&}{GetTextBackground}{\void}
@@ -517,6 +755,7 @@ implements the following methods:\par
 
 Gets the current text background colour (see \helpref{wxDC::SetTextBackground}{wxdcsettextbackground}).
 
+
 \membersection{wxDC::GetTextExtent}\label{wxdcgettextextent}
 
 \func{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w}, \param{wxCoord *}{h},\\
@@ -544,6 +783,12 @@ See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
 \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}
@@ -553,12 +798,16 @@ See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
 Gets the current text foreground colour (see \helpref{wxDC::SetTextForeground}{wxdcsettextforeground}).
 
 
+
 \membersection{wxDC::GetUserScale}\label{wxdcgetuserscale}
 
 \func{void}{GetUserScale}{\param{double}{ *x}, \param{double}{ *y}}
 
 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}
 
@@ -567,12 +816,15 @@ Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetusersca
 Converts logical X coordinate to device coordinate, using the current
 mapping mode.
 
+
 \membersection{wxDC::LogicalToDeviceXRel}\label{wxdclogicaltodevicexrel}
 
 \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}
 
@@ -581,12 +833,15 @@ mapping mode. Use this for converting a width, for example.
 Converts logical Y coordinate to device coordinate, using the current
 mapping mode.
 
+
 \membersection{wxDC::LogicalToDeviceYRel}\label{wxdclogicaltodeviceyrel}
 
 \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}
 
@@ -594,29 +849,34 @@ mapping mode. Use this for converting a height, for example.
 
 Gets the maximum horizontal extent used in drawing commands so far.
 
+
 \membersection{wxDC::MaxY}\label{wxdcmaxy}
 
 \func{wxCoord}{MaxY}{\void}
 
 Gets the maximum vertical extent used in drawing commands so far.
 
+
 \membersection{wxDC::MinX}\label{wxdcminx}
 
 \func{wxCoord}{MinX}{\void}
 
 Gets the minimum horizontal extent used in drawing commands so far.
 
+
 \membersection{wxDC::MinY}\label{wxdcminy}
 
 \func{wxCoord}{MinY}{\void}
 
 Gets the minimum vertical extent used in drawing commands so far.
 
+
 \membersection{wxDC::Ok}\label{wxdcok}
 
 \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}
 
@@ -629,6 +889,25 @@ doesn't contain anything.
 
 \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}}
@@ -639,12 +918,14 @@ applied).
 This function may be useful in Windows printing
 operations for placing a graphic on a page.
 
+
 \membersection{wxDC::SetBackground}\label{wxdcsetbackground}
 
 \func{void}{SetBackground}{\param{const wxBrush\& }{brush}}
 
 Sets the current background brush for the DC.
 
+
 \membersection{wxDC::SetBackgroundMode}\label{wxdcsetbackgroundmode}
 
 \func{void}{SetBackgroundMode}{\param{int}{ mode}}
@@ -652,20 +933,32 @@ Sets the current background brush for the DC.
 {\it mode} may be one of wxSOLID and wxTRANSPARENT. This setting determines
 whether text will be drawn with a background colour or not.
 
+
 \membersection{wxDC::SetClippingRegion}\label{wxdcsetclippingregion}
 
 \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}}
 
-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}
 
 \helpref{wxDC::DestroyClippingRegion}{wxdcdestroyclippingregion}, \helpref{wxRegion}{wxregion}
 
+
 \membersection{wxDC::SetPalette}\label{wxdcsetpalette}
 
 \func{void}{SetPalette}{\param{const wxPalette\& }{palette}}
@@ -677,6 +970,7 @@ restored.
 
 See \helpref{wxPalette}{wxpalette} for further details.
 
+
 \membersection{wxDC::SetBrush}\label{wxdcsetbrush}
 
 \func{void}{SetBrush}{\param{const wxBrush\& }{brush}}
@@ -692,18 +986,17 @@ See also \helpref{wxBrush}{wxbrush}.
 See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
 when drawing into a monochrome bitmap.
 
+
 \membersection{wxDC::SetFont}\label{wxdcsetfont}
 
 \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}.
 
+
 \membersection{wxDC::SetLogicalFunction}\label{wxdcsetlogicalfunction}
 
 \func{void}{SetLogicalFunction}{\param{int}{ function}}
@@ -741,6 +1034,7 @@ The others combine the current colour and the background using a
 logical operation.  wxINVERT is commonly used for drawing rubber bands or
 moving outlines, since drawing twice reverts to the original colour.
 
+
 \membersection{wxDC::SetMapMode}\label{wxdcsetmapmode}
 
 \func{void}{SetMapMode}{\param{int}{ int}}
@@ -750,15 +1044,13 @@ 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
-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
-now is always at the top left of the screen/printer.
+The coordinate origin is always at the top left of the screen/printer.
 
-Drawing to a Windows printer device context under UNIX
-uses the current mapping mode, but mapping mode is currently ignored for
-PostScript output.
+Drawing to a Windows printer device context uses the current mapping mode,
+but mapping mode is currently ignored for PostScript output.
 
 The mapping mode can be one of the following:
 
@@ -771,20 +1063,22 @@ The mapping mode can be one of the following:
 \twocolitem{wxMM\_TEXT}{Each logical unit is 1 pixel.}
 \end{twocollist}
 
+
 \membersection{wxDC::SetOptimization}\label{wxsetoptimization}
 
 \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
+if non-wxWidgets code is using the same device context or window, for example
 when the window is a panel on which the windowing system draws panel items.
-The wxWindows device context 'memory' will now be out of step with reality.
+The wxWidgets device context 'memory' will now be out of step with reality.
 
 Setting optimization off, drawing, then setting it back on again, is a trick
 that must occasionally be employed.
 
+
 \membersection{wxDC::SetPen}\label{wxdcsetpen}
 
 \func{void}{SetPen}{\param{const wxPen\& }{pen}}
@@ -797,12 +1091,14 @@ context, and the original pen restored.
 See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
 when drawing into a monochrome bitmap.
 
+
 \membersection{wxDC::SetTextBackground}\label{wxdcsettextbackground}
 
 \func{void}{SetTextBackground}{\param{const wxColour\& }{colour}}
 
 Sets the current text background colour for the DC.
 
+
 \membersection{wxDC::SetTextForeground}\label{wxdcsettextforeground}
 
 \func{void}{SetTextForeground}{\param{const wxColour\& }{colour}}
@@ -812,6 +1108,7 @@ Sets the current text foreground colour for the DC.
 See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
 when drawing into a monochrome bitmap.
 
+
 \membersection{wxDC::SetUserScale}\label{wxdcsetuserscale}
 
 \func{void}{SetUserScale}{\param{double}{ xScale}, \param{double}{ yScale}}
@@ -819,6 +1116,7 @@ when drawing into a monochrome bitmap.
 Sets the user scaling factor, useful for applications which require
 `zooming'.
 
+
 \membersection{wxDC::StartDoc}\label{wxdcstartdoc}
 
 \func{bool}{StartDoc}{\param{const wxString\& }{message}}
@@ -826,9 +1124,47 @@ Sets the user scaling factor, useful for applications which require
 Starts a document (only relevant when outputting to a printer).
 Message is a message to show whilst printing.
 
+
 \membersection{wxDC::StartPage}\label{wxdcstartpage}
 
 \func{bool}{StartPage}{\void}
 
 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.
+