X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0371e9a826a7d9c7a262c4a1aa4b09eba39acb59..57c5293e49b50007e8fb19f4953d65d6aeb45293:/docs/latex/wx/dc.tex diff --git a/docs/latex/wx/dc.tex b/docs/latex/wx/dc.tex index b2d9573af9..2dd9b7bb37 100644 --- a/docs/latex/wx/dc.tex +++ b/docs/latex/wx/dc.tex @@ -61,7 +61,7 @@ released for each drawing operation. \func{bool}{Blit}{\param{wxCoord}{ xdest}, \param{wxCoord}{ ydest}, \param{wxCoord}{ width}, \param{wxCoord}{ height}, \param{wxDC* }{source}, \param{wxCoord}{ xsrc}, \param{wxCoord}{ ysrc}, \param{int}{ logicalFunc = wxCOPY}, - \param{bool }{useMask = FALSE}, \param{wxCoord}{ xsrcMask = -1}, \param{wxCoord}{ ysrcMask = -1}} + \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, @@ -85,7 +85,7 @@ logical function, whether to use a bitmap mask, and mask source position. \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 +\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} @@ -133,7 +133,7 @@ See \helpref{wxMemoryDC}{wxmemorydc} for typical usage. \func{static bool}{CacheEnabled}{\void} -On supported platforms (currently only Windows), returns TRUE +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. @@ -231,7 +231,7 @@ 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 @@ -243,7 +243,7 @@ The arc is drawn in an anticlockwise direction from the start point to the end p \func{void}{DrawBitmap}{\param{const wxBitmap\&}{ bitmap}, \param{wxCoord}{ x}, \param{wxCoord}{ y}, \param{bool}{ transparent}} -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 @@ -319,7 +319,9 @@ This can be the simplest way of drawing bitmaps on a window. \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} @@ -487,7 +489,7 @@ 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, using the {\it current brush colour}, and using a style: @@ -497,7 +499,11 @@ the {\it current brush colour}, and using a style: \item wxFLOOD\_BORDER: the area to be flooded is bounded by the given colour. \end{itemize} -{\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} @@ -573,7 +579,7 @@ Gets the {\it mapping mode} for the device context (see \helpref{wxDC::SetMapMod \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} @@ -690,7 +696,7 @@ Gets the current text foreground colour (see \helpref{wxDC::SetTextForeground}{w Gets the current user scale factor (set by \helpref{SetUserScale}{wxdcsetuserscale}). -\perlnote{In wxPerl this method takes no arguments and returna a two element +\perlnote{In wxPerl this method takes no arguments and return a two element array {\tt ( x, y )}} \membersection{wxDC::LogicalToDeviceX}\label{wxdclogicaltodevicex} @@ -751,7 +757,7 @@ 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} @@ -909,7 +915,7 @@ measurement used to convert logical units to device units. Note that in X, text drawing isn't handled consistently with the mapping mode; a font is always specified in point size. However, setting the {\it user scale} (see \helpref{wxDC::SetUserScale}{wxdcsetuserscale}) scales the text appropriately. In -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 @@ -934,7 +940,7 @@ The mapping mode can be one of the following: \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 @@ -994,7 +1000,7 @@ 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 destroyes it in its destructor. Using +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} @@ -1024,5 +1030,5 @@ specified rectangle. \func{}{\destruct{wxDCClipper}}{\void} -Destructor: destroyes the clipping region set in the constructor. +Destructor: destroys the clipping region set in the constructor.