/usr/share/octave/site/m/vlfeat/toolbox/plotop/vl_click.m is in octave-vlfeat 0.9.17+dfsg0-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | function P = vl_click(N,varargin) ;
% VL_CLICK Click a point
% P=VL_CLICK() let the user click a point in the current figure and
% returns its coordinates in P. P is a two dimensiona vectors where
% P(1) is the point X-coordinate and P(2) the point Y-coordinate. The
% user can abort the operation by pressing any key, in which case the
% empty matrix is returned.
%
% P=VL_CLICK(N) lets the user select N points in a row. The user can
% stop inserting points by pressing any key, in which case the
% partial list is returned.
%
% VL_CLICK() accepts the following options:
%
% PlotMarker:: [0]
% Plot a marker as points are selected. The markers are deleted on
% exiting the function.
%
% See also: VL_CLICKPOINT(), VL_HELP().
% Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
% All rights reserved.
%
% This file is part of the VLFeat library and is made available under
% the terms of the BSD license (see the COPYING file).
plot_marker = 0 ;
for k=1:2:length(varargin)
switch lower(varargin{k})
case 'plotmarker'
plot_marker = varargin{k+1} ;
otherwise
error(['Uknown option ''', varargin{k}, '''.']) ;
end
end
if nargin < 1
N=1;
end
% --------------------------------------------------------------------
% Do job
% --------------------------------------------------------------------
fig = gcf ;
is_hold = ishold ;
hold on ;
bhandler = get(fig,'WindowButtonDownFcn') ;
khandler = get(fig,'KeyPressFcn') ;
pointer = get(fig,'Pointer') ;
set(fig,'WindowButtonDownFcn',@click_handler) ;
set(fig,'KeyPressFcn',@key_handler) ;
set(fig,'Pointer','crosshair') ;
P=[] ;
h=[] ;
data.exit=0;
guidata(fig,data) ;
while size(P,2) < N
uiwait(fig) ;
data = guidata(fig) ;
if(data.exit)
break ;
end
P = [P data.P] ;
if( plot_marker )
h=[h plot(data.P(1),data.P(2),'rx')] ;
end
end
if ~is_hold
hold off ;
end
if( plot_marker )
pause(.1);
delete(h) ;
end
set(fig,'WindowButtonDownFcn',bhandler) ;
set(fig,'KeyPressFcn',khandler) ;
set(fig,'Pointer',pointer) ;
% ====================================================================
function click_handler(obj,event)
% --------------------------------------------------------------------
data = guidata(gcbo) ;
P = get(gca, 'CurrentPoint') ;
P = [P(1,1); P(1,2)] ;
data.P = P ;
guidata(obj,data) ;
uiresume(gcbo) ;
% ====================================================================
function key_handler(obj,event)
% --------------------------------------------------------------------
data = guidata(gcbo) ;
data.exit = 1 ;
guidata(obj,data) ;
uiresume(gcbo) ;
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