an example).
A single cursor object may be used in many windows (any subwindow type).
-The wxWindows convention is to set the cursor for a window, as in X,
+The wxWidgets convention is to set the cursor for a window, as in X,
rather than to set it globally as in MS Windows, although a
global \helpref{::wxSetCursor}{wxsetcursor} is also available for MS Windows use.
<wx/cursor.h>
+\wxheading{Library}
+
+\helpref{wxCore}{librarieslist}
+
\wxheading{Predefined objects}
Objects:
\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxCursor::wxCursor}\label{wxcursorconstr}
+\membersection{wxCursor::wxCursor}\label{wxcursorctor}
\func{}{wxCursor}{\void}
Default constructor.
\func{}{wxCursor}{\param{const char}{ bits[]}, \param{int }{width},
- \param{int }{ height}, \param{int }{hotSpotX=-1}, \param{int }{hotSpotY=-1}, \param{const char }{maskBits[]=NULL}}
+ \param{int }{ height}, \param{int }{hotSpotX=-1}, \param{int }{hotSpotY=-1}, \param{const char }{maskBits[]=NULL},
+ \param{wxColour*}{ fg=NULL}, \param{wxColour*}{ bg=NULL}}
-Constructs a cursor by passing an array of bits (Motif and Xt only). {\it maskBits} is used only under Motif.
+Constructs a cursor by passing an array of bits (Motif and GTK+ only). {\it maskBits} is used only under
+Motif and GTK+. The parameters {\it fg} and {\it bg} are only present on GTK+, and force the
+cursor to use particular background and foreground colours.
If either {\it hotSpotX} or {\it hotSpotY} is -1, the hotspot will be the centre of the cursor image (Motif only).
\func{}{wxCursor}{\param{const wxImage\&}{ image}}
-Constructs a cursor from a wxImage. The cursor is monochrome, colors with the RGB elements all greater
-than 127 will be foreground, colors less than this background. The mask (if any) will be used as transparent.
+Constructs a cursor from a wxImage. If cursor are monochrome on the current
+platform, colors with the RGB elements all greater than 127 will be foreground,
+colors less than this background. The mask (if any) will be used to specify the
+transparent area.
+
+In wxMSW the foreground will be white and the background black. If the cursor
+is larger than 32x32 it is resized.
-In MSW the foreground will be white and the background black. The cursor is resized to 32x32
-In GTK, the two most frequent colors will be used for foreground and background. The cursor will be displayed
-at the size of the image.
-On MacOS the cursor is resized to 16x16 and currently only shown as black/white (mask respected).
+In wxGTK, colour cursors and alpha channel are supported (starting from GTK+
+2.2). Otherwise the two most frequent colors will be used for foreground and
+background. In any case, the cursor will be displayed at the size of the image.
+
+In wxMac, if the cursor is larger than 16x16 it is resized and currently only
+shown as black/white (mask respected).
\func{}{wxCursor}{\param{const wxCursor\&}{ cursor}}
-Copy constructor. This uses reference counting so is a cheap operation.
+Copy constructor, uses \helpref{reference counting}{trefcount}.
\wxheading{Parameters}
\end{itemize}
}
-\membersection{wxCursor::\destruct{wxCursor}}
+\wxheading{Example}
+
+The following is an example of creating a
+cursor from 32x32 bitmap data ({\tt down\_bits}) and a mask
+({\tt down\_mask}) where 1 is black and 0 is white for
+the bits, and 1 is opaque and 0 is transparent for
+the mask. It works on Windows and GTK+.
+
+\begin{verbatim}
+static char down_bits[] = { 255, 255, 255, 255, 31,
+ 255, 255, 255, 31, 255, 255, 255, 31, 255, 255, 255,
+ 31, 255, 255, 255, 31, 255, 255, 255, 31, 255, 255,
+ 255, 31, 255, 255, 255, 31, 255, 255, 255, 25, 243,
+ 255, 255, 19, 249, 255, 255, 7, 252, 255, 255, 15, 254,
+ 255, 255, 31, 255, 255, 255, 191, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255 };
+
+static char down_mask[] = { 240, 1, 0, 0, 240, 1,
+ 0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 240, 1,
+ 0, 0, 240, 1, 0, 0, 240, 1, 0, 0, 255, 31, 0, 0, 255,
+ 31, 0, 0, 254, 15, 0, 0, 252, 7, 0, 0, 248, 3, 0, 0,
+ 240, 1, 0, 0, 224, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0 };
+
+#ifdef __WXMSW__
+wxBitmap down_bitmap(down_bits, 32, 32);
+wxBitmap down_mask_bitmap(down_mask, 32, 32);
+
+down_bitmap.SetMask(new wxMask(down_mask_bitmap));
+wxImage down_image = down_bitmap.ConvertToImage();
+down_image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 6);
+down_image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 14);
+wxCursor down_cursor = wxCursor(down_image);
+#else
+wxCursor down_cursor = wxCursor(down_bits, 32, 32,
+ 6, 14, down_mask, wxWHITE, wxBLACK);
+#endif
+\end{verbatim}
+
+\membersection{wxCursor::\destruct{wxCursor}}\label{wxcursordtor}
\func{}{\destruct{wxCursor}}{\void}
-Destroys the cursor. A cursor can be reused for more
+Destroys the cursor.
+See \helpref{reference-counted object destruction}{refcountdestruct} for more info.
+
+A cursor can be reused for more
than one window, and does not get destroyed when the window is
-destroyed. wxWindows destroys all cursors on application exit, although
+destroyed. wxWidgets destroys all cursors on application exit, although
it is best to clean them up explicitly.
-\membersection{wxCursor::Ok}\label{wxcursorok}
+\membersection{wxCursor::IsOk}\label{wxcursorisok}
-\constfunc{bool}{Ok}{\void}
+\constfunc{bool}{IsOk}{\void}
Returns true if cursor data is present.
\func{wxCursor\&}{operator $=$}{\param{const wxCursor\& }{cursor}}
-Assignment operator, using reference counting. Returns a reference
-to `this'.
-
-\membersection{wxCursor::operator $==$}\label{wxcursorequals}
-
-\func{bool}{operator $==$}{\param{const wxCursor\& }{cursor}}
-
-Equality operator. Two cursors are equal if they contain pointers
-to the same underlying cursor data. It does not compare each attribute,
-so two independently-created cursors using the same parameters will
-fail the test.
-
-\membersection{wxCursor::operator $!=$}\label{wxcursornotequals}
-
-\func{bool}{operator $!=$}{\param{const wxCursor\& }{cursor}}
-
-Inequality operator. Two cursors are not equal if they contain pointers
-to different underlying cursor data. It does not compare each attribute.
-
+Assignment operator, using \helpref{reference counting}{trefcount}.
projects / wxWidgets.git / blobdiff