Kevin Ryde > X11-Protocol-Other > X11::CursorFont

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NAME ^

X11::CursorFont - cursor font glyph names and numbers

SYNOPSIS ^

 use X11::CursorFont '%CURSOR_GLYPH';
 my $num = $CURSOR_GLYPH{'fleur'};               # is 52
 my $name = $X11::CursorFont::CURSOR_NAME[52];   # is "fleur"

DESCRIPTION ^

This is the names and numbers of the glyphs in the X11 cursor font which contains various standard mouse pointer cursors.

%CURSOR_GLYPH maps a glyph name to its character number in the font,

    $CURSOR_GLYPH{'fleur'}     # is 52

@CURSOR_NAME conversely is indexed by character number and gives the glyph name,

    $CURSOR_NAME[52]           # is "fleur"

Each glyph has an associated mask at character number glyph+1 which is the shape of the cursor (the displayed vs transparent pixels). So the character numbers are always even and in @CURSOR_NAME only the even character positions have names.

The cursor images can be viewed with the usual xfd font display program,

     xfd -fn cursor

The names are per the Xlib /usr/include/X11/cursorfont.h file, without the XC_ prefixes. The full list is

    Name                  Number

    X_cursor                0    default fat X
    arrow                   2
    based_arrow_down        4
    based_arrow_up          6
    boat                    8
    bogosity               10
    bottom_left_corner     12
    bottom_right_corner    14
    bottom_side            16
    bottom_tee             18
    box_spiral             20    a square spiral
    center_ptr             22
    circle                 24
    clock                  26
    coffee_mug             28
    cross                  30
    cross_reverse          32
    crosshair              34    "+" shape
    diamond_cross          36
    dot                    38
    dotbox                 40
    double_arrow           42
    draft_large            44
    draft_small            46
    draped_box             48
    exchange               50
    fleur                  52
    gobbler                54
    gumby                  56
    hand1                  58
    hand2                  60
    heart                  62
    icon                   64
    iron_cross             66
    left_ptr               68
    left_side              70
    left_tee               72
    leftbutton             74
    ll_angle               76
    lr_angle               78
    man                    80
    middlebutton           82
    mouse                  84
    pencil                 86
    pirate                 88    skull and crossbones
    plus                   90
    question_arrow         92
    right_ptr              94
    right_side             96
    right_tee              98
    rightbutton           100
    rtl_logo              102
    sailboat              104
    sb_down_arrow         106
    sb_h_double_arrow     108
    sb_left_arrow         110
    sb_right_arrow        112
    sb_up_arrow           114
    sb_v_double_arrow     116
    shuttle               118
    sizing                120
    spider                122
    spraycan              124
    star                  126
    target                128
    tcross                130
    top_left_arrow        132
    top_left_corner       134
    top_right_corner      136
    top_side              138
    top_tee               140
    trek                  142
    ul_angle              144
    umbrella              146
    ur_angle              148
    watch                 150    a good "busy" indicator
    xterm                 152    a vertical insertion bar

X_cursor is the usual default when the server first starts or when the root window is set to cursor "None".

VARIABLES ^

%X11::CursorFont::CURSOR_GLYPH

A mapping of glyph name to cursor font character number.

@X11::CursorFont::CURSOR_NAME

A table of cursor font character number to glyph name.

EXPORTS ^

Nothing is exported by default, but %CURSOR_GLYPH and @CURSOR_NAME can be selected in usual Exporter style (see Exporter),

    use X11::CursorFont '%CURSOR_GLYPH', '@CURSOR_NAME';

EXAMPLE ^

For reference, here's how to create a cursor from a desired glyph,

    my $cursor_name = 'spraycan';
    my $cursor_glyph = $CURSOR_GLYPH{$cursor_name}; # number

    my $cursor_font = $X->new_rsrc;
    $X->OpenFont ($cursor_font, "cursor"); # cursor font

    my $cursor = $X->new_rsrc;
    $X->CreateGlyphCursor
           ($cursor,
            $cursor_font,  # font
            $cursor_font,  # mask font
            $cursor_glyph,      # glyph
            $cursor_glyph + 1,  # and its mask
            0,0,0,                  # foreground, black
            0xFFFF,0xFFFF,0xFFFF);  # background, white

    $X->CloseFont ($cursor_font);

    # then use $cursor with CreateWindow or ChangeWindowAttributes
    #       cursor => $cursor

The $cursor_font could be kept open if used repeatedly. Opening and closing isn't a round-trip, so an open when needed may be enough.

Any RGB colours can be given in CreateGlyphCursor(), but actual appearance on screen will be limited by the hardware.

All cursors in the core protocol are two-colours with pixels fully opaque or fully transparent as per this create. The RENDER extension, when available, can do multi-colour and partial transparency if desired (see X11::Protocol::Ext::RENDER).

SEE ALSO ^

X11::Protocol, X11::KeySyms

/usr/include/X11/cursorfont.h and listing in the Xlib manual appendix B (http://www.x.org/docs/X11/ or /usr/share/doc/libx11-dev/libX11.txt.gz).

Xlib Xmu XmuCursorNameToIndex() (http://www.x.org/docs/Xmu/ or /usr/share/doc/libxmu-headers/Xmu.txt.gz)

xfd(1) to display the cursor font.

xsetroot(1) to change the root window cursor.

HOME PAGE ^

http://user42.tuxfamily.org/x11-protocol-other/index.html

LICENSE ^

Copyright 2011, 2012, 2013 Kevin Ryde

X11-Protocol-Other is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

X11-Protocol-Other is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with X11-Protocol-Other. If not, see <http://www.gnu.org/licenses/>.

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