X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8165e9b6481b5e1cd446621df9dd465835e7f694..81c882b613b5d99ddb1e5ab69fcd7ebccc287025:/docs/latex/wx/cursor.tex diff --git a/docs/latex/wx/cursor.tex b/docs/latex/wx/cursor.tex index cbcf7afe04..a6f8fceed5 100644 --- a/docs/latex/wx/cursor.tex +++ b/docs/latex/wx/cursor.tex @@ -10,7 +10,7 @@ conditional compilation will probably be required (see \helpref{wxIcon}{wxicon} 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. @@ -43,16 +43,19 @@ wxCROSS\_CURSOR} \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). @@ -71,17 +74,24 @@ Constructs a cursor using a cursor identifier. \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 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 wxMSW the foreground will be white and the background black. If the cursor +is larger than 32x32 it is resized. + +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} @@ -174,42 +184,75 @@ hotSpotY=0)}}{Constructs a cursor from a filename} \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. +Returns true if cursor data is present. \membersection{wxCursor::operator $=$}\label{wxcursorassignment} \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}.