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{See also}
  24
  25 \helpref{wxBitmap}{wxbitmap}, \helpref{wxIcon}{wxicon}, \helpref{wxWindow::SetCursor}{wxwindowsetcursor},\rtfsp
  26 \helpref{::wxSetCursor}{wxsetcursor}
  27
  28 \latexignore{\rtfignore{\wxheading{Members}}}
  29
  30 \membersection{wxCursor::wxCursor}\label{wxcursorconstr}
  31
  32 \func{}{wxCursor}{\void}
  33
  34 Default constructor.
  35
  36 \func{}{wxCursor}{\param{const char}{ bits[]}, \param{int }{width},
  37  \param{int }{ height}, \param{int }{hotSpotX=-1}, \param{int }{hotSpotY=-1}, \param{const char }{maskBits[]=NULL}}
  38
  39 Constructs a cursor by passing an array of bits (Motif and Xt only). {\it maskBits} is used only under Motif.
  40
  41 If either {\it hotSpotX} or {\it hotSpotY} is -1, the hotspot will be the centre of the cursor image (Motif only).
  42
  43 \func{}{wxCursor}{\param{const wxString\& }{cursorName}, \param{long }{type}, \param{int }{hotSpotX=0}, \param{int }{hotSpotY=0}}
  44
  45 Constructs a cursor by passing a string resource name or filename.
  46
  47 {\it hotSpotX} and {\it hotSpotY} are currently only used under Windows when loading from an
  48 icon file, to specify the cursor hotspot relative to the top left of the image.
  49
  50 \func{}{wxCursor}{\param{int}{ cursorId}}
  51
  52 Constructs a cursor using a cursor identifier.
  53
  54 \func{}{wxCursor}{\param{const wxCursor\&}{ cursor}}
  55
  56 Copy constructor. This uses reference counting so is a cheap operation.
  57
  58 \wxheading{Parameters}
  59
  60 \docparam{bits}{An array of bits.}
  61
  62 \docparam{maskBits}{Bits for a mask bitmap.}
  63
  64 \docparam{width}{Cursor width.}
  65
  66 \docparam{height}{Cursor height.}
  67
  68 \docparam{hotSpotX}{Hotspot x coordinate.}
  69
  70 \docparam{hotSpotY}{Hotspot y coordinate.}
  71
  72 \docparam{type}{Icon type to load. Under Motif, {\it type} defaults to {\bf wxBITMAP\_TYPE\_XBM}. Under Windows,
  73 it defaults to {\bf wxBITMAP\_TYPE\_CUR\_RESOURCE}.
  74
  75 Under X, the permitted cursor types are:
  76
  77 \twocolwidtha{6cm}
  78 \begin{twocollist}\itemsep=0pt
  79 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_XBM}}{Load an X bitmap file.}
  80 \end{twocollist}
  81
  82 Under Windows, the permitted types are:
  83
  84 \twocolwidtha{6cm}
  85 \begin{twocollist}\itemsep=0pt
  86 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_CUR}}{Load a cursor from a .cur cursor file (only if USE\_RESOURCE\_LOADING\_IN\_MSW
  87 is enabled in wx\_setup.h).}
  88 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_CUR\_RESOURCE}}{Load a Windows resource (as specified in the .rc file).}
  89 \twocolitem{\windowstyle{wxBITMAP\_TYPE\_ICO}}{Load a cursor from a .ico icon file (only if USE\_RESOURCE\_LOADING\_IN\_MSW
  90 is enabled in wx\_setup.h). Specify {\it hotSpotX} and {\it hotSpotY}.}
  91 \end{twocollist}}
  92
  93 \docparam{cursorId}{A stock cursor identifier. May be one of:
  94
  95 \twocolwidtha{6cm}
  96 \begin{twocollist}\itemsep=0pt
  97 \twocolitem{{\bf wxCURSOR\_ARROW}}{A standard arrow cursor.}
  98 \twocolitem{{\bf wxCURSOR\_BULLSEYE}}{Bullseye cursor.}
  99 \twocolitem{{\bf wxCURSOR\_CHAR}}{Rectangular character cursor.}
 100 \twocolitem{{\bf wxCURSOR\_CROSS}}{A cross cursor.}
 101 \twocolitem{{\bf wxCURSOR\_HAND}}{A hand cursor.}
 102 \twocolitem{{\bf wxCURSOR\_IBEAM}}{An I-beam cursor (vertical line).}
 103 \twocolitem{{\bf wxCURSOR\_LEFT\_BUTTON}}{Represents a mouse with the left button depressed.}
 104 \twocolitem{{\bf wxCURSOR\_MAGNIFIER}}{A magnifier icon.}
 105 \twocolitem{{\bf wxCURSOR\_MIDDLE\_BUTTON}}{Represents a mouse with the middle button depressed.}
 106 \twocolitem{{\bf wxCURSOR\_NO\_ENTRY}}{A no-entry sign cursor.}
 107 \twocolitem{{\bf wxCURSOR\_PAINT\_BRUSH}}{A paintbrush cursor.}
 108 \twocolitem{{\bf wxCURSOR\_PENCIL}}{A pencil cursor.}
 109 \twocolitem{{\bf wxCURSOR\_POINT\_LEFT}}{A cursor that points left.}
 110 \twocolitem{{\bf wxCURSOR\_POINT\_RIGHT}}{A cursor that points right.}
 111 \twocolitem{{\bf wxCURSOR\_QUESTION\_ARROW}}{An arrow and question mark.}
 112 \twocolitem{{\bf wxCURSOR\_RIGHT\_BUTTON}}{Represents a mouse with the right button depressed.}
 113 \twocolitem{{\bf wxCURSOR\_SIZENESW}}{A sizing cursor pointing NE-SW.}
 114 \twocolitem{{\bf wxCURSOR\_SIZENS}}{A sizing cursor pointing N-S.}
 115 \twocolitem{{\bf wxCURSOR\_SIZENWSE}}{A sizing cursor pointing NW-SE.}
 116 \twocolitem{{\bf wxCURSOR\_SIZEWE}}{A sizing cursor pointing W-E.}
 117 \twocolitem{{\bf wxCURSOR\_SIZING}}{A general sizing cursor.}
 118 \twocolitem{{\bf wxCURSOR\_SPRAYCAN}}{A spraycan cursor.}
 119 \twocolitem{{\bf wxCURSOR\_WAIT}}{A wait cursor.}
 120 \twocolitem{{\bf wxCURSOR\_WATCH}}{A watch cursor.}
 121 \end{twocollist}\twocolwidtha{5cm}
 122
 123 Note that not all cursors are available on all platforms.}
 124
 125 \docparam{cursor}{Pointer or reference to a cursor to copy.}
 126
 127 \membersection{wxCursor::\destruct{wxCursor}}
 128
 129 \func{}{\destruct{wxCursor}}{\void}
 130
 131 Destroys the cursor. A cursor can be reused for more
 132 than one window, and does not get destroyed when the window is
 133 destroyed. wxWindows destroys all cursors on application exit, although
 134 it's best to clean them up explicitly.
 135
 136 \membersection{wxCursor::Ok}\label{wxcursorok}
 137
 138 \constfunc{bool}{Ok}{\void}
 139
 140 Returns TRUE if cursor data is present.
 141
 142 \membersection{wxCursor::operator $=$}\label{wxcursorassignment}
 143
 144 \func{wxCursor\&}{operator $=$}{\param{const wxCursor\& }{cursor}}
 145
 146 Assignment operator, using reference counting. Returns a reference
 147 to `this'.
 148
 149 \membersection{wxCursor::operator $==$}\label{wxcursorequals}
 150
 151 \func{bool}{operator $==$}{\param{const wxCursor\& }{cursor}}
 152
 153 Equality operator. Two cursors are equal if they contain pointers
 154 to the same underlying cursor data. It does not compare each attribute,
 155 so two independently-created cursors using the same parameters will
 156 fail the test.
 157
 158 \membersection{wxCursor::operator $!=$}\label{wxcursornotequals}
 159
 160 \func{bool}{operator $!=$}{\param{const wxCursor\& }{cursor}}
 161
 162 Inequality operator. Two cursors are not equal if they contain pointers
 163 to different underlying cursor data. It does not compare each attribute.
 164
 165