lines and painting the outline of rectangles, ellipses, etc. It has a
colour, a width and a style.
+\wxheading{Derived from}
+
+\helpref{wxGDIObject}{wxgdiobject}\\
+\helpref{wxObject}{wxobject}
+
+\wxheading{Include files}
+
+<wx/pen.h>
+
+\wxheading{Predefined objects}
+
+Objects:
+
+{\bf wxNullPen}
+
+Pointers:
+
+{\bf wxRED\_PEN\\
+wxCYAN\_PEN\\
+wxGREEN\_PEN\\
+wxBLACK\_PEN\\
+wxWHITE\_PEN\\
+wxTRANSPARENT\_PEN\\
+wxBLACK\_DASHED\_PEN\\
+wxGREY\_PEN\\
+wxMEDIUM\_GREY\_PEN\\
+wxLIGHT\_GREY\_PEN}
+
\wxheading{Remarks}
-On a monochrome display, wxWindows shows all non-white pens as black.
+On a monochrome display, wxWidgets shows all non-white pens as black.
Do not initialize objects on the stack before the program commences,
since other required structures may not have been set up yet. Instead,
wxThePenList}, and calling the member function {\bf FindOrCreatePen}.
See the entry for \helpref{wxPenList}{wxpenlist}.
-TODO: an overview for wxPen.
+wxPen uses a reference counting system, so assignments between brushes are very
+cheap. You can therefore use actual wxPen objects instead of pointers without
+efficiency problems. Once one wxPen object changes its data it will create its
+own pen data internally so that other pens, which previously shared the
+data using the reference counting, are not affected.
+%TODO: an overview for wxPen.
\wxheading{See also}
\helpref{wxPenList}{wxpenlist}, \helpref{wxDC}{wxdc}, \helpref{wxDC::SetPen}{wxdcsetpen}
\func{}{wxPen}{\void}
Default constructor. The pen will be uninitialised, and \helpref{wxPen::Ok}{wxpenok} will
-return FALSE.
+return false.
-\func{}{wxPen}{\param{const wxColour\&}{ colour}, \param{int}{ width}, \param{int}{ style}}
+\func{}{wxPen}{\param{const wxColour\&}{ colour}, \param{int}{ width = $1$}, \param{int}{ style = {\tt wxSOLID}}}
Constructs a pen from a colour object, pen width and style.
Copy constructor. This uses reference counting so is a cheap operation.
-\func{}{wxPen}{\param{const wxPen*}{ pen}}
-
-Copy constructor. This uses reference counting so is a cheap operation.
-
\wxheading{Parameters}
\docparam{colour}{A colour object.}
\docparam{pen}{A pointer or reference to a pen to copy.}
-\docparam{width}{Pen width. Under Windows, the pen width cannot be greater than 1 if
-the style is wxDOT, wxLONG\_DASH, wxSHORT\_DASH, wxDOT\_DASH, or wxUSER\_DASH.}
-
\docparam{style}{The style may be one of the following:
\begin{twocollist}\itemsep=0pt
\wxheading{Remarks}
+Different versions of Windows and different versions of other platforms
+support {\it very} different subsets of the styles above - there is no
+similarity even between Windows95 and Windows98 - so handle with care.
+
If the named colour form is used, an appropriate {\bf wxColour} structure
is found in the colour database.
-{\it style} may be one of wxSOLID, wxDOT, wxLONG\_DASH, wxSHORT\_DASH and
-wxDOT\_DASH.
-
\wxheading{See also}
\helpref{wxPen::SetStyle}{wxpensetstyle}, \helpref{wxPen::SetColour}{wxpensetcolour},\rtfsp
\helpref{wxPen::SetWidth}{wxpensetwidth}, \helpref{wxPen::SetStipple}{wxpensetstipple}
+\perlnote{Constructors supported by wxPerl are:\par
+\begin{itemize}
+\item{Wx::Pen->new( colour, width, style )}
+\item{Wx::Pen->new( colourName, width, style )}
+\item{Wx::Pen->new( stipple, width )}
+\end{itemize}
+}
+
\membersection{wxPen::\destruct{wxPen}}
\func{}{\destruct{wxPen}}{\void}
Although all remaining pens are deleted when the application exits,
the application should try to clean up all pens itself. This is because
-wxWindows cannot know if a pointer to the pen object is stored in an
+wxWidgets cannot know if a pointer to the pen object is stored in an
application data structure, and there is a risk of double deletion.
\membersection{wxPen::GetCap}\label{wxpengetcap}
\constfunc{bool}{Ok}{\void}
-Returns TRUE if the pen is initialised.
+Returns true if the pen is initialised.
\membersection{wxPen::SetCap}\label{wxpensetcap}
deallocated by the calling application until the pen is deleted or this
function is called with a NULL array.
-TODO: describe in detail.
-
+%TODO: describe in detail.
\wxheading{See also}
\helpref{wxPen::GetDashes}{wxpengetdashes}
\membersection{wxPen::SetJoin}\label{wxpensetjoin}
-\func{void}{SetJoin}{\param{int}{join\_style}}
+\func{void}{SetJoin}{\param{int }{join\_style}}
Sets the pen join style, which may be one of {\bf wxJOIN\_BEVEL}, {\bf wxJOIN\_ROUND} and
\rtfsp{\bf wxJOIN\_MITER}. The default is {\bf wxJOIN\_ROUND}.
`memory leaks'. However, it is best not to rely on this automatic
cleanup because it can lead to double deletion in some circumstances.
-There are two mechanisms in recent versions of wxWindows which make the
+There are two mechanisms in recent versions of wxWidgets which make the
pen list less useful than it once was. Under Windows, scarce resources
are cleaned up internally if they are not being used. Also, a referencing
counting mechanism applied to all GDI objects means that some sharing
your application is using too many resources, you can resort to using
GDI lists to share objects explicitly.
-The only compelling use for the pen list is for wxWindows to keep
+The only compelling use for the pen list is for wxWidgets to keep
track of pens in order to clean them up on exit. It is also kept for
-backward compatibility with earlier versions of wxWindows.
+backward compatibility with earlier versions of wxWidgets.
\wxheading{See also}
\func{void}{AddPen}{\param{wxPen*}{ pen}}
-Used internally by wxWindows to add a pen to the list.
+Used internally by wxWidgets to add a pen to the list.
\membersection{wxPenList::FindOrCreatePen}\label{wxpenlistfindorcreatepen}
\docparam{colour}{Colour object.}
-\docparam{colourName}{Colour name, which should be in the colour database.}
+\docparam{colourName}{Colour name, which should be in the \helpref{colour database}{wxcolourdatabase}.}
+
+\docparam{width}{Width of pen.}
\docparam{style}{Pen style. See \helpref{wxPen::wxPen}{wxpenconstr} for a list of styles.}
\func{void}{RemovePen}{\param{wxPen*}{ pen}}
-Used by wxWindows to remove a pen from the list.
+Used by wxWidgets to remove a pen from the list.
projects / wxWidgets.git / blobdiff