docs/latex/wx/cursor.tex

   1 \section{\class{wxCursor}}\label{wxcursor}
   2
   3 A cursor is a small bitmap usually used for denoting where the mouse
   4 pointer is, with a picture that might indicate the interpretation of a
   5 mouse click. As with icons, cursors in X and MS Windows are created
   6 in a different manner. Therefore, separate cursors will be created for the
   7 different environments.  Platform-specific methods for creating a {\bf
   8 wxCursor} object are catered for, and this is an occasion where
   9 conditional compilation will probably be required (see \helpref{wxIcon}{wxicon} for
  10 an example).
  11
  12 A single cursor object may be used in many windows (any subwindow type).
  13 The wxWindows convention is to set the cursor for a window, as in X,
  14 rather than to set it globally as in MS Windows, although a
  15 global \helpref{::wxSetCursor}{wxsetcursor} is also available for MS Windows use.
  16
  17 \wxheading{Derived from}
  18
  19 \helpref{wxBitmap}{wxbitmap}\\
  20 \helpref{wxGDIObject}{wxgdiobject}\\
  21 \helpref{wxObject}{wxobject}
  22
  23 \wxheading{Include files}
  24
  25 <wx/cursor.h>
  26
  27 \wxheading{Predefined objects}
  28
  29 Objects:
  30
  31 {\bf wxNullCursor}
  32
  33 Pointers:
  34
  35 {\bf wxSTANDARD\_CURSOR\\
  36 wxHOURGLASS\_CURSOR\\
  37 wxCROSS\_CURSOR}
  38
  39 \wxheading{See also}
  40
  41 \helpref{wxBitmap}{wxbitmap}, \helpref{wxIcon}{wxicon}, \helpref{wxWindow::SetCursor}{wxwindowsetcursor},\rtfsp
  42 \helpref{::wxSetCursor}{wxsetcursor}
  43
  44 \latexignore{\rtfignore{\wxheading{Members}}}
  45
  46 \membersection{wxCursor::wxCursor}\label{wxcursorconstr}
  47
  48 \func{}{wxCursor}{\void}
  49
  50 Default constructor.
  51
  52 \func{}{wxCursor}{\param{const char}{ bits[]}, \param{int }{width},
  53  \param{int }{ height}, \param{int }{hotSpotX=-1}, \param{int }{hotSpotY=-1}, \param{const char }{maskBits[]=NULL}}
  54
  55 Constructs a cursor by passing an array of bits (Motif and Xt only). {\it maskBits} is used only under Motif.
  56
  57 If either {\it hotSpotX} or {\it hotSpotY} is -1, the hotspot will be the centre of the cursor image (Motif only).
  58
  59 \func{}{wxCursor}{\param{const wxString\& }{cursorName}, \param{long }{type}, \param{int }{hotSpotX=0}, \param{int }{hotSpotY=0}}
  60
  61 Constructs a cursor by passing a string resource name or filename.
  62
  63 {\it hotSpotX} and {\it hotSpotY} are currently only used under Windows when loading from an
  64 icon file, to specify the cursor hotspot relative to the top left of the image.
  65
  66 \func{}{wxCursor}{\param{int}{ cursorId}}
  67
  68 Constructs a cursor using a cursor identifier.
  69
  70 \func{}{wxCursor}{\param{const wxCursor\&}{ cursor}}
  71
  72 Copy constructor. This uses reference counting so is a cheap operation.
  73
  74 \wxheading{Parameters}
  75
  76 \docparam{bits}{An array of bits.}
  77
  78 \docparam{maskBits}{Bits for a mask bitmap.}
  79
  80 \docparam{width}{Cursor width.}
  81
  82 \docparam{height}{Cursor height.}
  83
  84 \docparam{hotSpotX}{Hotspot x coordinate.}
  85
  86 \docparam{hotSpotY}{Hotspot y coordinate.}
  87
  88 \docparam{type}{Icon type to load. Under Motif, {\it type} defaults to {\bf wxBITMAP\_TYPE\_XBM}. Under Windows,
  89 it defaults to {\bf wxBITMAP\_TYPE\_CUR\_RESOURCE}.
  90
  91 Under X, the permitted cursor types are:
  92
  93 \twocolwidtha{6cm}
  94 \begin{twocollist}\itemsep=0pt
  95 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_XBM}}{Load an X bitmap file.}
  96 \end{twocollist}
  97
  98 Under Windows, the permitted types are:
  99
 100 \twocolwidtha{6cm}
 101 \begin{twocollist}\itemsep=0pt
 102 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_CUR}}{Load a cursor from a .cur cursor file (only if USE\_RESOURCE\_LOADING\_IN\_MSW
 103 is enabled in setup.h).}
 104 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_CUR\_RESOURCE}}{Load a Windows resource (as specified in the .rc file).}
 105 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_ICO}}{Load a cursor from a .ico icon file (only if USE\_RESOURCE\_LOADING\_IN\_MSW
 106 is enabled in setup.h). Specify {\it hotSpotX} and {\it hotSpotY}.}
 107 \end{twocollist}}
 108
 109 \docparam{cursorId}{A stock cursor identifier. May be one of:
 110
 111 \twocolwidtha{6cm}
 112 \begin{twocollist}\itemsep=0pt
 113 \twocolitem{{\bf wxCURSOR\_ARROW}}{A standard arrow cursor.}
 114 \twocolitem{{\bf wxCURSOR\_BULLSEYE}}{Bullseye cursor.}
 115 \twocolitem{{\bf wxCURSOR\_CHAR}}{Rectangular character cursor.}
 116 \twocolitem{{\bf wxCURSOR\_CROSS}}{A cross cursor.}
 117 \twocolitem{{\bf wxCURSOR\_HAND}}{A hand cursor.}
 118 \twocolitem{{\bf wxCURSOR\_IBEAM}}{An I-beam cursor (vertical line).}
 119 \twocolitem{{\bf wxCURSOR\_LEFT\_BUTTON}}{Represents a mouse with the left button depressed.}
 120 \twocolitem{{\bf wxCURSOR\_MAGNIFIER}}{A magnifier icon.}
 121 \twocolitem{{\bf wxCURSOR\_MIDDLE\_BUTTON}}{Represents a mouse with the middle button depressed.}
 122 \twocolitem{{\bf wxCURSOR\_NO\_ENTRY}}{A no-entry sign cursor.}
 123 \twocolitem{{\bf wxCURSOR\_PAINT\_BRUSH}}{A paintbrush cursor.}
 124 \twocolitem{{\bf wxCURSOR\_PENCIL}}{A pencil cursor.}
 125 \twocolitem{{\bf wxCURSOR\_POINT\_LEFT}}{A cursor that points left.}
 126 \twocolitem{{\bf wxCURSOR\_POINT\_RIGHT}}{A cursor that points right.}
 127 \twocolitem{{\bf wxCURSOR\_QUESTION\_ARROW}}{An arrow and question mark.}
 128 \twocolitem{{\bf wxCURSOR\_RIGHT\_BUTTON}}{Represents a mouse with the right button depressed.}
 129 \twocolitem{{\bf wxCURSOR\_SIZENESW}}{A sizing cursor pointing NE-SW.}
 130 \twocolitem{{\bf wxCURSOR\_SIZENS}}{A sizing cursor pointing N-S.}
 131 \twocolitem{{\bf wxCURSOR\_SIZENWSE}}{A sizing cursor pointing NW-SE.}
 132 \twocolitem{{\bf wxCURSOR\_SIZEWE}}{A sizing cursor pointing W-E.}
 133 \twocolitem{{\bf wxCURSOR\_SIZING}}{A general sizing cursor.}
 134 \twocolitem{{\bf wxCURSOR\_SPRAYCAN}}{A spraycan cursor.}
 135 \twocolitem{{\bf wxCURSOR\_WAIT}}{A wait cursor.}
 136 \twocolitem{{\bf wxCURSOR\_WATCH}}{A watch cursor.}
 137 \end{twocollist}\twocolwidtha{5cm}
 138
 139 Note that not all cursors are available on all platforms.}
 140
 141 \docparam{cursor}{Pointer or reference to a cursor to copy.}
 142
 143 \pythonnote{Constructors supported by wxPython are:\par
 144 \indented{2cm}{\begin{twocollist}
 145 \twocolitem{{\bf wxCursor(name, flags, hotSpotX=0,
 146 hotSpotY=0)}}{Constructs a cursor from a filename}
 147 \twocolitem{{\bf wxStockCursor(id)}}{Constructs a stock cursor }
 148 \end{twocollist}}
 149 }
 150
 151 \perlnote{Contructors supported by wxPerl are:\par
 152 \begin{itemize}
 153 \item{Wx::Cursor->new( name, type, hotSpotX = 0, hotSpotY = 0 )}
 154 \item{Wx::Cursor->new( id )}
 155 \end{itemize}
 156 }
 157
 158 \membersection{wxCursor::\destruct{wxCursor}}
 159
 160 \func{}{\destruct{wxCursor}}{\void}
 161
 162 Destroys the cursor. A cursor can be reused for more
 163 than one window, and does not get destroyed when the window is
 164 destroyed. wxWindows destroys all cursors on application exit, although
 165 it is best to clean them up explicitly.
 166
 167 \membersection{wxCursor::Ok}\label{wxcursorok}
 168
 169 \constfunc{bool}{Ok}{\void}
 170
 171 Returns TRUE if cursor data is present.
 172
 173 \membersection{wxCursor::operator $=$}\label{wxcursorassignment}
 174
 175 \func{wxCursor\&}{operator $=$}{\param{const wxCursor\& }{cursor}}
 176
 177 Assignment operator, using reference counting. Returns a reference
 178 to `this'.
 179
 180 \membersection{wxCursor::operator $==$}\label{wxcursorequals}
 181
 182 \func{bool}{operator $==$}{\param{const wxCursor\& }{cursor}}
 183
 184 Equality operator. Two cursors are equal if they contain pointers
 185 to the same underlying cursor data. It does not compare each attribute,
 186 so two independently-created cursors using the same parameters will
 187 fail the test.
 188
 189 \membersection{wxCursor::operator $!=$}\label{wxcursornotequals}
 190
 191 \func{bool}{operator $!=$}{\param{const wxCursor\& }{cursor}}
 192
 193 Inequality operator. Two cursors are not equal if they contain pointers
 194 to different underlying cursor data. It does not compare each attribute.
 195
 196