X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/461fb267e6401cb9fae35bc8bb1ae359b9631817..19f6bff4484b97ef036a793820eb30c0a6df92b5:/docs/latex/wx/dc.tex

diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex
index f873f16ad0..e5ce0687ed 100644
--- a/docs/latex/wx/dc.tex
+++ b/docs/latex/wx/dc.tex
@@ -6,8 +6,10 @@ so a window can have a device context associated with it, and a printer also has
 In this way, the same piece of code may write to a number of different devices,
 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.
+Notice that wxDC is an abstract base class and can't be created directly,
+please use \helpref{wxPaintDC}{wxpaintdc}, \helpref{wxClientDC}{wxclientdc}, 
+\helpref{wxWindowDC}{wxwindowdc}, \helpref{wxScreenDC}{wxscreendc}, 
+\helpref{wxMemoryDC}{wxmemorydc} or \helpref{wxPrinterDC}{wxprinterdc}.
 
 % 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
@@ -16,6 +18,12 @@ 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{Support for Transparency / Alpha Channel}
+
+On Mac OS X when using Core Graphics (wx\_MAC\_USE\_CORE\_GRAPHICS set to 1) 
+colors with alpha are supported, so instances  {\tt wxPen} or  {\tt wxBrush} that are built from  {\tt wxColour} use
+the color's alpha values when stroking or filling.
+
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}
@@ -31,36 +39,6 @@ them.
 \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}
-
-Allows optimization of drawing code under MS Windows. Enclose
-drawing primitives between {\bf BeginDrawing} and {\bf EndDrawing}\rtfsp
-calls.
-
-Drawing to a wxDialog panel device context outside of a
-system-generated OnPaint event {\it requires} this pair of calls to
-enclose drawing code. This is because a Windows dialog box does not have
-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},
@@ -109,7 +87,7 @@ This sequence of operations ensures that the source's transparent area need not
 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
+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.
 
@@ -130,7 +108,7 @@ See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
 
 \wxheading{See also}
 
-\helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
+\helpref{wxDC::StretchBlit}{wxdcstretchblit}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}
 
 \begin{comment}
 
@@ -193,6 +171,15 @@ wxUSE\_DC\_CACHEING preprocessor symbol for portability.
 \end{comment}
 
 
+\membersection{wxDC::ComputeScaleAndOrigin}\label{wxdccomputescaleandorigin}
+
+\func{virtual void}{ComputeScaleAndOrigin}{\void}
+
+Performs all necessary computations for given platform and context type
+after each change of scale and origin parameters. Usually called automatically 
+internally after such changes.
+
+
 \membersection{wxDC::CrossHair}\label{wxdccrosshair}
 
 \func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
@@ -212,7 +199,7 @@ See also \helpref{wxDC::SetClippingRegion}{wxdcsetclippingregion}.
 
 \membersection{wxDC::DeviceToLogicalX}\label{wxdcdevicetologicalx}
 
-\func{wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
 
 Convert device X coordinate to logical coordinate, using the current
 mapping mode.
@@ -220,7 +207,7 @@ mapping mode.
 
 \membersection{wxDC::DeviceToLogicalXRel}\label{wxdcdevicetologicalxrel}
 
-\func{wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{DeviceToLogicalXRel}{\param{wxCoord}{ x}}
 
 Convert device X coordinate to relative logical coordinate, using the current
 mapping mode but ignoring the x axis orientation.
@@ -229,7 +216,7 @@ Use this function for converting a width, for example.
 
 \membersection{wxDC::DeviceToLogicalY}\label{wxdcdevicetologicaly}
 
-\func{wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
 
 Converts device Y coordinate to logical coordinate, using the current
 mapping mode.
@@ -237,7 +224,7 @@ mapping mode.
 
 \membersection{wxDC::DeviceToLogicalYRel}\label{wxdcdevicetologicalyrel}
 
-\func{wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{DeviceToLogicalYRel}{\param{wxCoord}{ y}}
 
 Convert device Y coordinate to relative logical coordinate, using the current
 mapping mode but ignoring the y axis orientation.
@@ -336,6 +323,24 @@ 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::DrawLabel}\label{wxdcdrawlabel}
+
+\func{virtual void}{DrawLabel}{\param{const wxString\&}{ text},
+                               \param{const wxBitmap\&}{ image},
+                               \param{const wxRect\&}{ rect},
+                               \param{int}{ alignment = wxALIGN\_LEFT | wxALIGN\_TOP},
+                               \param{int}{ indexAccel = -1},
+                               \param{wxRect *}{rectBounding = NULL}}
+
+\func{void}{DrawLabel}{\param{const wxString\&}{ text}, \param{const wxRect\&}{ rect},
+                       \param{int}{ alignment = wxALIGN\_LEFT | wxALIGN\_TOP},
+                       \param{int}{ indexAccel = -1}}
+
+Draw optional bitmap and the text into the given rectangle and aligns it as specified
+by alignment parameter; it also will emphasize the character with the given index if
+it is != -1 and return the bounding rectangle if required.
+
+
 \membersection{wxDC::DrawLine}\label{wxdcdrawline}
 
 \func{void}{DrawLine}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}}
@@ -383,7 +388,7 @@ 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.}
@@ -395,18 +400,41 @@ of wxPoint objects.}
 
 \membersection{wxDC::DrawPolyPolygon}\label{wxdcdrawpolypolygon}
 
-\func{void}{DrawPolyPolygon}{\param{int }{n}, \param{int }{start[]}, \param{wxPoint }{points[]}, \param{wxCoord }{xoffset}, \param{wxCoord }{yoffset}, \param{int }{fillStyle = \texttt{wxODDEVEN\_RULE}}}
+\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.
 
-Draw many polygons at once. For the platforms providing a native implementation
-of this function (Windows and PostScript-based wxDC), this is more efficient
-than using \helpref{DrawPolygon}{wxdcdrawpolygon} in a loop.
+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.
+Draws a point using the color of the current pen. Note that the other properties of the pen are not used, such as width etc..
 
 
 \membersection{wxDC::DrawRectangle}\label{wxdcdrawrectangle}
@@ -436,7 +464,7 @@ which is.
 
 \membersection{wxDC::DrawRoundedRectangle}\label{wxdcdrawroundedrectangle}
 
-\func{void}{DrawRoundedRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{double}{ radius = 20}}
+\func{void}{DrawRoundedRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{double}{ radius}}
 
 Draws a rectangle with the given top left corner, and with the given
 size.  The corners are quarter-circles using the given radius. The
@@ -454,12 +482,15 @@ the rectangle.
 
 \membersection{wxDC::DrawSpline}\label{wxdcdrawspline}
 
+\func{void}{DrawSpline}{\param{int }{n}, \param{wxPoint }{points[]}}
+
+Draws a spline between all given control points, using the current
+pen.
+
 \func{void}{DrawSpline}{\param{wxList *}{points}}
 
 Draws a spline between all given control points, using the current
-pen.  Doesn't delete the wxList and contents. The spline is drawn
-using a series of lines, using an algorithm taken from the X drawing
-program `XFIG'.
+pen.  Doesn't delete the wxList and contents.
 
 \func{void}{DrawSpline}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{wxCoord}{ x3}, \param{wxCoord}{ y3}}
 
@@ -515,15 +546,6 @@ wxUSE\_DC\_CACHEING preprocessor symbol for portability.
 Ends a document (only relevant when outputting to a printer).
 
 
-\membersection{wxDC::EndDrawing}\label{wxdcenddrawing}
-
-\func{void}{EndDrawing}{\void}
-
-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}
@@ -552,8 +574,6 @@ function will still return true.
 
 \membersection{wxDC::GetBackground}\label{wxdcgetbackground}
 
-\func{wxBrush\&}{GetBackground}{\void}
-
 \constfunc{const wxBrush\&}{GetBackground}{\void}
 
 Gets the brush used for painting the background (see \helpref{wxDC::SetBackground}{wxdcsetbackground}).
@@ -572,8 +592,6 @@ Returns the current background mode: {\tt wxSOLID} or {\tt wxTRANSPARENT}.
 
 \membersection{wxDC::GetBrush}\label{wxdcgetbrush}
 
-\func{wxBrush\&}{GetBrush}{\void}
-
 \constfunc{const wxBrush\&}{GetBrush}{\void}
 
 Gets the current brush (see \helpref{wxDC::SetBrush}{wxdcsetbrush}).
@@ -608,11 +626,26 @@ rectangle are returned as a tuple.}
 
 \membersection{wxDC::GetFont}\label{wxdcgetfont}
 
-\func{wxFont\&}{GetFont}{\void}
-
 \constfunc{const wxFont\&}{GetFont}{\void}
 
-Gets the current font (see \helpref{wxDC::SetFont}{wxdcsetfont}).
+Gets the current font. Notice that even although each device context object has
+some default font after creation, this method would return a \texttt{wxNullFont} 
+initially and only after calling \helpref{wxDC::SetFont}{wxdcsetfont} a valid
+font is returned.
+
+
+\membersection{wxDC::GetLayoutDirection}\label{wxdcgetlayoutdirection}
+
+\constfunc{wxLayoutDirection}{GetLayoutDirection}{\void}
+
+Gets the current layout direction of the device context. On platforms where RTL layout
+is supported, the return value will either be \texttt{wxLayout\_LeftToRight} or 
+\texttt{wxLayout\_RightToLeft}. If RTL layout is not supported, the return value will 
+be \texttt{wxLayout\_Default}.
+
+\wxheading{See also}
+
+\helpref{SetLayoutDirection}{wxdcsetlayoutdirection}
 
 
 \membersection{wxDC::GetLogicalFunction}\label{wxdcgetlogicalfunction}
@@ -629,17 +662,56 @@ Gets the current logical function (see \helpref{wxDC::SetLogicalFunction}{wxdcse
 Gets the {\it mapping mode} for the device context (see \helpref{wxDC::SetMapMode}{wxdcsetmapmode}).
 
 
-\membersection{wxDC::GetOptimization}\label{wxdcgetoptimization}
+\membersection{wxDC::GetMultiLineTextExtent}\label{wxdcgetmultilinetextextent}
 
-\func{bool}{GetOptimization}{\void}
+\constfunc{void}{GetMultiLineTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w},\\
+  \param{wxCoord *}{h}, \param{wxCoord *}{heightLine = NULL}, \param{wxFont *}{font = NULL}}
 
-Returns true if device context optimization is on.
-See \helpref{wxDC::SetOptimization}{wxsetoptimization} for details.
+\constfunc{wxSize}{GetMultiLineTextExtent}{\param{const wxString\& }{string}}
 
+Gets the dimensions of the string using the currently selected font.
+\rtfsp{\it string} is the text string to measure, {\it heightLine}, if non NULL,
+is where to store the height of a single line.
 
-\membersection{wxDC::GetPen}\label{wxdcgetpen}
+The text extent is returned in {\it w} and {\it h} pointers (first form) or as
+a \helpref{wxSize}{wxsize} object (second form).
+
+If the optional parameter {\it font} is specified and valid, then it is used
+for the text extent calculation. Otherwise the currently selected font is.
 
-\func{wxPen\&}{GetPen}{\void}
+Note that this function works both with single-line and multi-line strings.
+
+\wxheading{See also}
+
+\helpref{wxFont}{wxfont},\rtfsp
+\helpref{wxDC::SetFont}{wxdcsetfont},\rtfsp
+\helpref{wxDC::GetPartialTextExtents}{wxdcgetpartialtextextents},\rtfsp
+\helpref{wxDC::GetTextExtent}{wxdcgettextextent}
+
+
+\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 beginning of 
+{\it text} to the corresponding 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 implementation then it should be used
+instead. 
+
+\wxheading{See also}
+
+\helpref{wxDC::GetMultiLineTextExtent}{wxdcgetmultilinetextextent},\rtfsp
+\helpref{wxDC::GetTextExtent}{wxdcgettextextent}
+
+\pythonnote{This method only takes the {\it text} parameter and
+  returns a Python list of integers.}
+
+
+\membersection{wxDC::GetPen}\label{wxdcgetpen}
 
 \constfunc{const wxPen\&}{GetPen}{\void}
 
@@ -650,8 +722,10 @@ 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.
+Gets in {\it colour} the colour at the specified location.
+Not available for wxPostScriptDC or wxMetafileDC.
+
+Note that setting a pixel can be done using \helpref{DrawPoint}{wxdcdrawpoint}.
 
 \pythonnote{For wxPython the wxColour value is returned and is not
 required as a parameter.}
@@ -659,17 +733,20 @@ 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:
@@ -698,10 +775,15 @@ implements the following methods:\par
 \end{twocollist}
 }}
 
+\membersection{wxDC::GetSizeMM}\label{wxdcgetsizemm}
 
-\membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
+\constfunc{void}{GetSizeMM}{\param{wxCoord *}{width}, \param{wxCoord *}{height}}
+
+\constfunc{wxSize}{GetSizeMM}{\void}
 
-\func{wxColour\&}{GetTextBackground}{\void}
+Returns the horizontal and vertical resolution in millimetres.
+
+\membersection{wxDC::GetTextBackground}\label{wxdcgettextbackground}
 
 \constfunc{const wxColour\&}{GetTextBackground}{\void}
 
@@ -710,22 +792,31 @@ Gets the current text background colour (see \helpref{wxDC::SetTextBackground}{w
 
 \membersection{wxDC::GetTextExtent}\label{wxdcgettextextent}
 
-\func{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w}, \param{wxCoord *}{h},\\
-  \param{wxCoord *}{descent = NULL}, \param{wxCoord *}{externalLeading = NULL}, \param{wxFont *}{font = NULL}}
+\constfunc{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{wxCoord *}{w}, \param{wxCoord *}{h},\\
+  \param{wxCoord *}{descent = NULL}, \param{wxCoord *}{externalLeading = NULL}, \param{const wxFont *}{font = NULL}}
+
+\constfunc{wxSize}{GetTextExtent}{\param{const wxString\& }{string}}
 
 Gets the dimensions of the string using the currently selected font.
-\rtfsp{\it string} is the text string to measure, {\it w} and {\it h} are
-the total width and height respectively, {\it descent} is the
+\rtfsp{\it string} is the text string to measure, {\it descent} is the
 dimension from the baseline of the font to the bottom of the
 descender, and {\it externalLeading} is any extra vertical space added
 to the font by the font designer (usually is zero).
 
-The optional parameter {\it font} specifies an alternative
-to the currently selected font: but note that this does not
-yet work under Windows, so you need to set a font for
-the device context first.
+The text extent is returned in {\it w} and {\it h} pointers (first form) or as
+a \helpref{wxSize}{wxsize} object (second form).
+
+If the optional parameter {\it font} is specified and valid, then it is used
+for the text extent calculation. Otherwise the currently selected font is.
+
+Note that this function only works with single-line strings.
+
+\wxheading{See also}
 
-See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
+\helpref{wxFont}{wxfont},\rtfsp
+\helpref{wxDC::SetFont}{wxdcsetfont},\rtfsp
+\helpref{wxDC::GetPartialTextExtents}{wxdcgetpartialtextextents},\rtfsp
+\helpref{wxDC::GetMultiLineTextExtent}{wxdcgetmultilinetextextent}
 
 \pythonnote{The following methods are implemented in wxPython:\par
 \indented{2cm}{\begin{twocollist}
@@ -743,14 +834,11 @@ See also \helpref{wxFont}{wxfont}, \helpref{wxDC::SetFont}{wxdcsetfont}.
 
 \membersection{wxDC::GetTextForeground}\label{wxdcgettextforeground}
 
-\func{wxColour\&}{GetTextForeground}{\void}
-
 \constfunc{const wxColour\&}{GetTextForeground}{\void}
 
 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}}
@@ -761,9 +849,38 @@ Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetusersca
  array {\tt ( x, y )}}
 
 
+\membersection{wxDC::GradientFillConcentric}\label{wxdcgradientfillconcentric}
+
+\func{void}{GradientFillConcentric}{\param{const wxRect\&}{ rect}, \param{const wxColour\&}{ initialColour}, \param{const wxColour\&}{ destColour}}
+
+\func{void}{GradientFillConcentric}{\param{const wxRect\&}{ rect}, \param{const wxColour\&}{ initialColour}, \param{const wxColour\&}{ destColour}, \param{const wxPoint\& }{circleCenter}}
+
+Fill the area specified by rect with a radial gradient, starting from 
+\arg{initialColour} at the centre of the circle and fading to \arg{destColour} 
+on the circle outside.
+
+\arg{circleCenter} are the relative coordinates of centre of the circle in
+the specified \arg{rect}. If not specified, the cercle is placed at the
+centre of rect.
+
+\textbf{Note: } Currently this function is very slow, don't use it for
+real-time drawing.
+
+
+\membersection{wxDC::GradientFillLinear}\label{wxdcgradientfilllinear}
+
+\func{void}{GradientFillLinear}{\param{const wxRect\&}{ rect}, \param{const wxColour\&}{ initialColour}, \param{const wxColour\&}{ destColour}, \param{wxDirection}{ nDirection = wxEAST}}
+
+Fill the area specified by \arg{rect} with a linear gradient, starting from 
+\arg{initialColour} and eventually fading to \arg{destColour}. The 
+\arg{nDirection} specifies the direction of the colour change, default is to
+use \arg{initialColour} on the left part of the rectangle and 
+\arg{destColour} on the right one.
+
+
 \membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex}
 
-\func{wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
 
 Converts logical X coordinate to device coordinate, using the current
 mapping mode.
@@ -771,7 +888,7 @@ mapping mode.
 
 \membersection{wxDC::LogicalToDeviceXRel}\label{wxdclogicaltodevicexrel}
 
-\func{wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
+\func{virtual wxCoord}{LogicalToDeviceXRel}{\param{wxCoord}{ x}}
 
 Converts logical X coordinate to relative device coordinate, using the current
 mapping mode but ignoring the x axis orientation.
@@ -780,7 +897,7 @@ Use this for converting a width, for example.
 
 \membersection{wxDC::LogicalToDeviceY}\label{wxdclogicaltodevicey}
 
-\func{wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
 
 Converts logical Y coordinate to device coordinate, using the current
 mapping mode.
@@ -788,7 +905,7 @@ mapping mode.
 
 \membersection{wxDC::LogicalToDeviceYRel}\label{wxdclogicaltodeviceyrel}
 
-\func{wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
+\func{virtual wxCoord}{LogicalToDeviceYRel}{\param{wxCoord}{ y}}
 
 Converts logical Y coordinate to relative device coordinate, using the current
 mapping mode but ignoring the y axis orientation.
@@ -823,7 +940,7 @@ Gets the minimum horizontal extent used in drawing commands so far.
 Gets the minimum vertical extent used in drawing commands so far.
 
 
-\membersection{wxDC::Ok}\label{wxdcok}
+\membersection{wxDC::IsOk}\label{wxdcisok}
 
 \func{bool}{Ok}{\void}
 
@@ -848,8 +965,8 @@ doesn't contain anything.
                                 \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.
+highest values on the axis). The default orientation is 
+x axis from left to right and y axis from top down.
 
 \wxheading{Parameters}
 
@@ -860,17 +977,6 @@ left to right orientation, false to invert it.}
 bottom up orientation, false to invert it.}
 
 
-\membersection{wxDC::SetDeviceOrigin}\label{wxdcsetdeviceorigin}
-
-\func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
-
-Sets the device origin (i.e., the origin in pixels after scaling has been
-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}}
@@ -886,6 +992,22 @@ Sets the current background brush for the DC.
 whether text will be drawn with a background colour or not.
 
 
+\membersection{wxDC::SetBrush}\label{wxdcsetbrush}
+
+\func{void}{SetBrush}{\param{const wxBrush\& }{brush}}
+
+Sets the current brush for the DC.
+
+If the argument is wxNullBrush, the current brush is selected out of the device
+context (leaving wxDC without any valid brush), allowing the current brush to
+be destroyed safely.
+
+See also \helpref{wxBrush}{wxbrush}.
+
+See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
+when drawing into a monochrome bitmap.
+
+ 
 \membersection{wxDC::SetClippingRegion}\label{wxdcsetclippingregion}
 
 \func{void}{SetClippingRegion}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
@@ -911,42 +1033,37 @@ when only a known area of the screen is damaged.
 \helpref{wxDC::DestroyClippingRegion}{wxdcdestroyclippingregion}, \helpref{wxRegion}{wxregion}
 
 
-\membersection{wxDC::SetPalette}\label{wxdcsetpalette}
-
-\func{void}{SetPalette}{\param{const wxPalette\& }{palette}}
+\membersection{wxDC::SetDeviceOrigin}\label{wxdcsetdeviceorigin}
 
-If this is a window DC or memory DC, assigns the given palette to the window
-or bitmap associated with the DC. If the argument is wxNullPalette, the current
-palette is selected out of the device context, and the original palette
-restored.
+\func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
 
-See \helpref{wxPalette}{wxpalette} for further details.
+Sets the device origin (i.e., the origin in pixels after scaling has been
+applied).
 
+This function may be useful in Windows printing
+operations for placing a graphic on a page.
 
-\membersection{wxDC::SetBrush}\label{wxdcsetbrush}
 
-\func{void}{SetBrush}{\param{const wxBrush\& }{brush}}
+\membersection{wxDC::SetFont}\label{wxdcsetfont}
 
-Sets the current brush for the DC.
+\func{void}{SetFont}{\param{const wxFont\& }{font}}
 
-If the argument is wxNullBrush, the current brush is selected out of the device
-context, and the original brush restored, allowing the current brush 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{wxBrush}{wxbrush}.
+See also \helpref{wxFont}{wxfont}.
 
-See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
-when drawing into a monochrome bitmap.
 
+\membersection{wxDC::SetLayoutDirection}\label{wxdcsetlayoutdirection}
 
-\membersection{wxDC::SetFont}\label{wxdcsetfont}
+\func{void}{SetLayoutDirection}{\param{wxLayoutDirection}{ dir}}
 
-\func{void}{SetFont}{\param{const wxFont\& }{font}}
+Sets the current layout direction for the device context. \arg{dir} may be either
+\texttt{wxLayout\_Default}, \texttt{wxLayout\_LeftToRight} or \texttt{wxLayout\_RightToLeft}.
 
-Sets the current font for the DC. It must be a valid font, in particular you
-should not pass {\tt wxNullFont} to this method.
+\wxheading{See also}
 
-See also \helpref{wxFont}{wxfont}.
+\helpref{GetLayoutDirection}{wxdcgetlayoutdirection}
 
 
 \membersection{wxDC::SetLogicalFunction}\label{wxdcsetlogicalfunction}
@@ -999,12 +1116,10 @@ user scale} (see \helpref{wxDC::SetUserScale}{wxdcsetuserscale}) scales the text
 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:
 
@@ -1018,19 +1133,16 @@ The mapping mode can be one of the following:
 \end{twocollist}
 
 
-\membersection{wxDC::SetOptimization}\label{wxsetoptimization}
+\membersection{wxDC::SetPalette}\label{wxdcsetpalette}
 
-\func{void}{SetOptimization}{\param{bool }{optimize}}
+\func{void}{SetPalette}{\param{const wxPalette\& }{palette}}
 
-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
-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.
+If this is a window DC or memory DC, assigns the given palette to the window
+or bitmap associated with the DC. If the argument is wxNullPalette, the current
+palette is selected out of the device context, and the original palette
+restored.
 
-Setting optimization off, drawing, then setting it back on again, is a trick
-that must occasionally be employed.
+See \helpref{wxPalette}{wxpalette} for further details. 
 
 
 \membersection{wxDC::SetPen}\label{wxdcsetpen}
@@ -1040,7 +1152,8 @@ that must occasionally be employed.
 Sets the current pen for the DC.
 
 If the argument is wxNullPen, the current pen is selected out of the device
-context, and the original pen restored.
+context (leaving wxDC without any valid pen), allowing the current brush to
+be destroyed safely.
 
 See also \helpref{wxMemoryDC}{wxmemorydc} for the interpretation of colours
 when drawing into a monochrome bitmap.
@@ -1076,7 +1189,7 @@ Sets the user scaling factor, useful for applications which require
 \func{bool}{StartDoc}{\param{const wxString\& }{message}}
 
 Starts a document (only relevant when outputting to a printer).
-Message is a message to show whilst printing.
+Message is a message to show while printing.
 
 
 \membersection{wxDC::StartPage}\label{wxdcstartpage}
@@ -1085,40 +1198,84 @@ Message is a message to show whilst printing.
 
 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.
+\membersection{wxDC::StretchBlit}\label{wxdcstretchblit}
 
-\wxheading{Derived from}
+\func{bool}{StretchBlit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ dstWidth}, \param{wxCoord}{ dstHeight},
+  \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{wxCoord}{ srcWidth}, \param{wxCoord}{ srcHeight}, 
+  \param{int}{ logicalFunc = wxCOPY}, \param{bool }{useMask = false}, \param{wxCoord}{ xsrcMask = -1}, \param{wxCoord}{ ysrcMask = -1}}
 
-No base class
+Copy from a source DC to this DC, specifying the destination
+coordinates, destination size, source DC, source coordinates,
+size of source area to copy, logical function, whether to use a bitmap mask, 
+and mask source position.
 
-\wxheading{Include files}
+\wxheading{Parameters}
 
-<wx/dc.h>
+\docparam{xdest}{Destination device context x position.}
 
-\wxheading{See also}
+\docparam{ydest}{Destination device context y position.}
 
-\helpref{wxDC}{wxdc}
+\docparam{dstWidth}{Width of destination area.}
 
-\latexignore{\rtfignore{\wxheading{Members}}}
+\docparam{dstHeight}{Height of destination area.}
+
+\docparam{source}{Source device context.}
 
+\docparam{xsrc}{Source device context x position.}
 
-\membersection{wxDCClipper::wxDCClipper}
+\docparam{ysrc}{Source device context y position.}
 
-\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{wxCoord }{x},\param{wxCoord }{y},\param{wxCoord }{w},\param{wxCoord }{h},}
+\docparam{srcWidth}{Width of source area to be copied.}
 
-\func{}{wxDCClipper}{\param{wxDC\& }{dc}, \param{const wxRect\&}{ rect}}
+\docparam{srcHeight}{Height of source area to be copied.}
 
-Constructor: sets the the clipping region for the given device context to the
-specified rectangle.
+\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 if \texttt{MaskBlt} cannot be used:
 
-\membersection{wxDCClipper::\destruct{wxDCClipper}}
+\begin{enumerate}
+\item Creates a temporary bitmap and copies the destination area into it.
+\item Copies the source area into the temporary bitmap using the specified logical function.
+\item Sets the masked area in the temporary bitmap to BLACK by ANDing the
+mask bitmap with the temp bitmap with the foreground colour set to WHITE
+and the background colour set to BLACK.
+\item Sets the unmasked area in the destination area to BLACK by ANDing the
+mask bitmap with the destination area with the foreground colour set to BLACK
+and the background colour set to WHITE.
+\item ORs the temporary bitmap with the destination area.
+\item Deletes the temporary bitmap.
+\end{enumerate}
 
-\func{}{\destruct{wxDCClipper}}{\void}
+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 \texttt{wxUSE\_DC\_CACHE} option enabled. You can also influence whether \texttt{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.
+
+wxDC::StretchBlit is only implemented under wxMAC and wxMSW.
+
+See \helpref{wxMemoryDC}{wxmemorydc} for typical usage.
+
+\newsince{2.9.0}
+
+\wxheading{See also}
 
-Destructor: destroys the clipping region set in the constructor.
+\helpref{wxDC::Blit}{wxdcblit}, \helpref{wxMemoryDC}{wxmemorydc}, \helpref{wxBitmap}{wxbitmap}, \helpref{wxMask}{wxmask}