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}
\membersection{wxDC::Blit}\label{wxdcblit}
-\func{bool}{Blit}{\param{long}{ xdest}, \param{long}{ ydest}, \param{long}{ width}, \param{long}{ height},
- \param{wxDC* }{source}, \param{long}{ xsrc}, \param{long}{ ysrc}, \param{int}{ logicalFunc = wxCOPY},
- \param{bool }{useMask = FALSE}}
+\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{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}
\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.
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.
\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}}
+
+Adds the specified point to the bounding box which can be retrieved with
+\helpref{MinX}{wxdcminx}, \helpref{MaxX}{wxdcmaxx} and
+\helpref{MinY}{wxdcminy}, \helpref{MaxY}{wxdcmaxy} functions.
+
+\wxheading{See also}
+
+\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{long}{ x}, \param{long}{ y}}
+\func{void}{CrossHair}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
Displays a cross hair using the current pen. This is a vertical
and horizontal line the height and width of the window, centred
\membersection{wxDC::DeviceToLogicalX}\label{wxdcdevicetologicalx}
-\func{long}{DeviceToLogicalX}{\param{long}{ x}}
+\func{wxCoord}{DeviceToLogicalX}{\param{wxCoord}{ x}}
Convert device X coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalXRel}\label{wxdcdevicetologicalxrel}
-\func{long}{DeviceToLogicalXRel}{\param{long}{ x}}
+\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}
-\func{long}{DeviceToLogicalY}{\param{long}{ y}}
+\func{wxCoord}{DeviceToLogicalY}{\param{wxCoord}{ y}}
Converts device Y coordinate to logical coordinate, using the current
mapping mode.
\membersection{wxDC::DeviceToLogicalYRel}\label{wxdcdevicetologicalyrel}
-\func{long}{DeviceToLogicalYRel}{\param{long}{ y}}
+\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{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}, \param{double}{ xc}, \param{double}{ yc}}
+\func{void}{DrawArc}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{double}{ xc}, \param{double}{ 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
\membersection{wxDC::DrawBitmap}\label{wxdcdrawbitmap}
-\func{void}{DrawBitmap}{\param{const wxBitmap\&}{ bitmap}, \param{long}{ x}, \param{long}{ 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
+of the bitmap (all bits set to 1), and the current text background colour to draw the background
+(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}}
+
+\func{void}{DrawCheckMark}{\param{const wxRect \&}{rect}}
+
+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{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}}
+\func{void}{DrawEllipse}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
+
+\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.
-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.
+\wxheading{See also}
+
+\helpref{DrawCircle}{wxdcdrawcircle}
\membersection{wxDC::DrawEllipticArc}\label{wxdcdrawellipticarc}
-\func{void}{DrawEllipticArc}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height},
+\func{void}{DrawEllipticArc}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height},
\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.
\membersection{wxDC::DrawIcon}\label{wxdcdrawicon}
-\func{void}{DrawIcon}{\param{const wxIcon\&}{ icon}, \param{long}{ x}, \param{long}{ y}}
+\func{void}{DrawIcon}{\param{const wxIcon\&}{ icon}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
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{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}}
+\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.
\membersection{wxDC::DrawLines}\label{wxdcdrawlines}
-\func{void}{DrawLines}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0}}
+\func{void}{DrawLines}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0}}
-\func{void}{DrawLines}{\param{wxList *}{points}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0}}
+\func{void}{DrawLines}{\param{wxList *}{points}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0}}
Draws lines using an array of {\it points} of size {\it n}, or list of
pointers to points, adding the optional offset coordinate. The current
\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{long}{ xoffset = 0}, \param{long}{ yoffset = 0},\\
+\func{void}{DrawPolygon}{\param{int}{ n}, \param{wxPoint}{ points[]}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
\param{int }{fill\_style = wxODDEVEN\_RULE}}
-\func{void}{DrawPolygon}{\param{wxList *}{points}, \param{long}{ xoffset = 0}, \param{long}{ yoffset = 0},\\
+\func{void}{DrawPolygon}{\param{wxList *}{points}, \param{wxCoord}{ xoffset = 0}, \param{wxCoord}{ yoffset = 0},\\
\param{int }{fill\_style = wxODDEVEN\_RULE}}
Draws a filled polygon using an array of {\it points} of size {\it n},
\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{long}{ x}, \param{long}{ y}}
+\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{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}}
+\func{void}{DrawRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}}
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{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ height}, \param{double}{ radius = 20}}
+\func{void}{DrawRoundedRectangle}{\param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{double}{ radius = 20}}
Draws a rectangle with the given top left corner, and with the given
size. The corners are quarter-circles using the given radius. The
using a series of lines, using an algorithm taken from the X drawing
program `XFIG'.
-\func{void}{DrawSpline}{\param{long}{ x1}, \param{long}{ y1}, \param{long}{ x2}, \param{long}{ y2}, \param{long}{ x3}, \param{long}{ y3}}
+\func{void}{DrawSpline}{\param{wxCoord}{ x1}, \param{wxCoord}{ y1}, \param{wxCoord}{ x2}, \param{wxCoord}{ y2}, \param{wxCoord}{ x3}, \param{wxCoord}{ y3}}
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{long}{ x}, \param{long}{ y}}
+\func{void}{DrawText}{\param{const wxString\& }{text}, \param{wxCoord}{ x}, \param{wxCoord}{ y}}
Draws a text string at the specified point, using the current text font,
and the current text foreground and background colours.
to get the dimensions of a text string, which can be used to position the
text more precisely.
+{\bf NB:} under wxGTK the current
+\helpref{logical function}{wxdcgetlogicalfunction} is used by this function
+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::FloodFill}\label{wxdcfloodfill}
-\func{void}{FloodFill}{\param{long}{ x}, \param{long}{ y}, \param{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}
\func{wxBrush\&}{GetBackground}{\void}
+\constfunc{const wxBrush\&}{GetBackground}{\void}
+
Gets the brush used for painting the background (see \helpref{wxDC::SetBackground}{wxdcsetbackground}).
+\membersection{wxDC::GetBackgroundMode}\label{wxdcgetbackgroundmode}
+
+\constfunc{int}{GetBackgroundMode}{\void}
+
+Returns the current background mode: {\tt wxSOLID} or {\tt wxTRANSPARENT}.
+
+\wxheading{See also}
+
+\helpref{SetBackgroundMode}{wxdcsetbackgroundmode}
+
\membersection{wxDC::GetBrush}\label{wxdcgetbrush}
\func{wxBrush\&}{GetBrush}{\void}
+\constfunc{const wxBrush\&}{GetBrush}{\void}
+
Gets the current brush (see \helpref{wxDC::SetBrush}{wxdcsetbrush}).
\membersection{wxDC::GetCharHeight}\label{wxdcgetcharheight}
-\func{long}{GetCharHeight}{\void}
+\func{wxCoord}{GetCharHeight}{\void}
Gets the character height of the currently set font.
\membersection{wxDC::GetCharWidth}\label{wxdcgetcharwidth}
-\func{long}{GetCharWidth}{\void}
+\func{wxCoord}{GetCharWidth}{\void}
Gets the average character width of the currently set font.
\membersection{wxDC::GetClippingBox}\label{wxdcgetclippingbox}
-\func{void}{GetClippingBox}{\param{long}{ *x}, \param{long}{ *y}, \param{long}{ *width}, \param{long}{ *height}}
+\func{void}{GetClippingBox}{\param{wxCoord}{ *x}, \param{wxCoord}{ *y}, \param{wxCoord}{ *width}, \param{wxCoord}{ *height}}
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}
+\constfunc{const wxFont\&}{GetFont}{\void}
+
Gets the current font (see \helpref{wxDC::SetFont}{wxdcsetfont}).
\membersection{wxDC::GetLogicalFunction}\label{wxdcgetlogicalfunction}
\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}
\func{wxPen\&}{GetPen}{\void}
+\constfunc{const wxPen\&}{GetPen}{\void}
+
Gets the current pen (see \helpref{wxDC::SetPen}{wxdcsetpen}).
\membersection{wxDC::GetPixel}\label{wxdcgetpixel}
-\func{bool}{GetPixel}{\param{long}{ x}, \param{long}{ y}, \param{wxColour *}{colour}}
+\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.
+\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{long *}{width}, \param{long *}{height}}
+\func{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.
printer page:
\begin{verbatim}
- long w, h;
+ wxCoord w, h;
dc.GetSize(&w, &h);
double scaleX=(double)(maxX/w);
double scaleY=(double)(maxY/h);
\pythonnote{In place of a single overloaded method name, wxPython
implements the following methods:\par
\indented{2cm}{\begin{twocollist}
-\twocolitem{\bf{GetSize()}}{Returns a wxSize}
-\twocolitem{\bf{GetSizeTuple()}}{Returns a 2-tuple (width, height)}
+\twocolitem{{\bf GetSize()}}{Returns a wxSize}
+\twocolitem{{\bf GetSizeTuple()}}{Returns a 2-tuple (width, height)}
\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}
+\constfunc{const wxColour\&}{GetTextBackground}{\void}
+
Gets the current text background colour (see \helpref{wxDC::SetTextBackground}{wxdcsettextbackground}).
\membersection{wxDC::GetTextExtent}\label{wxdcgettextextent}
-\func{void}{GetTextExtent}{\param{const wxString\& }{string}, \param{long *}{w}, \param{long *}{h},\\
- \param{long *}{descent = NULL}, \param{long *}{externalLeading = NULL}, \param{wxFont *}{font = NULL}}
+\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}}
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
\pythonnote{The following methods are implemented in wxPython:\par
\indented{2cm}{\begin{twocollist}
-\twocolitem{\bf{GetTextExtent(string)}}{Returns a 2-tuple, (width, height)}
-\twocolitem{\bf{GetFullTextExtent(string, font=NULL)}}{Returns a
+\twocolitem{{\bf GetTextExtent(string)}}{Returns a 2-tuple, (width, height)}
+\twocolitem{{\bf GetFullTextExtent(string, font=NULL)}}{Returns a
4-tuple, (width, height, descent, externalLeading) }
\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}
+\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}}
+
+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}
-\func{long}{LogicalToDeviceX}{\param{long}{ x}}
+\func{wxCoord}{LogicalToDeviceX}{\param{wxCoord}{ x}}
Converts logical X coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceXRel}\label{wxdclogicaltodevicexrel}
-\func{long}{LogicalToDeviceXRel}{\param{long}{ x}}
+\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}
-\func{long}{LogicalToDeviceY}{\param{long}{ y}}
+\func{wxCoord}{LogicalToDeviceY}{\param{wxCoord}{ y}}
Converts logical Y coordinate to device coordinate, using the current
mapping mode.
\membersection{wxDC::LogicalToDeviceYRel}\label{wxdclogicaltodeviceyrel}
-\func{long}{LogicalToDeviceYRel}{\param{long}{ y}}
+\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}
-\func{long}{MaxX}{\void}
+\func{wxCoord}{MaxX}{\void}
Gets the maximum horizontal extent used in drawing commands so far.
\membersection{wxDC::MaxY}\label{wxdcmaxy}
-\func{long}{MaxY}{\void}
+\func{wxCoord}{MaxY}{\void}
Gets the maximum vertical extent used in drawing commands so far.
\membersection{wxDC::MinX}\label{wxdcminx}
-\func{long}{MinX}{\void}
+\func{wxCoord}{MinX}{\void}
Gets the minimum horizontal extent used in drawing commands so far.
\membersection{wxDC::MinY}\label{wxdcminy}
-\func{long}{MinY}{\void}
+\func{wxCoord}{MinY}{\void}
Gets the minimum vertical extent used in drawing commands so far.
\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}
+
+\func{void}{ResetBoundingBox}{\void}
+
+Resets the bounding box: after a call to this function, the bounding box
+doesn't contain anything.
+
+\wxheading{See also}
+
+\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{long}{ x}, \param{long}{ y}}
+\func{void}{SetDeviceOrigin}{\param{wxCoord}{ x}, \param{wxCoord}{ y}}
Sets the device origin (i.e., the origin in pixels after scaling has been
applied).
\membersection{wxDC::SetClippingRegion}\label{wxdcsetclippingregion}
-\func{void}{SetClippingRegion}{\param{long}{ x}, \param{long}{ y}, \param{long}{ width}, \param{long}{ 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}}
-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}
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}.
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
\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 the argument is wxNullPen, the current pen is selected out of the device
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 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}}
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.
+
projects / wxWidgets.git / blobdiff