1 | function P = click(N,varargin) ; |
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2 | % CLICK Click a point |
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3 | % P=CLICK() let the user click a point in the current figure and |
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4 | % returns its coordinates in P. The user can abort the operation |
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5 | % by pressing any key, in which case the empty matrix is returned. |
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6 | % |
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7 | % P=CLICK(N) lets the user select N points in a row. The user can |
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8 | % stop inserting points by pressing any key, in which case the |
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9 | % partial list is returned. |
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10 | % |
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11 | % CLICK(V,N,'Opt',val,...) accepts the following options: |
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12 | % |
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13 | % 'PlotMarker' [0] |
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14 | % Put a marker as points are selected. The markers are |
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15 | % deleted on exiting the function. |
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16 | % |
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17 | % See also CLICKPOINT(). |
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18 | |
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19 | % AUTORIGHTS |
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20 | % Copyright (C) 2006 Andrea Vedaldi |
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21 | % |
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22 | % This file is part of VLUtil. |
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23 | % |
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24 | % VLUtil is free software; you can redistribute it and/or modify |
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25 | % it under the terms of the GNU General Public License as published by |
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26 | % the Free Software Foundation; either version 2, or (at your option) |
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27 | % any later version. |
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28 | % |
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29 | % This program is distributed in the hope that it will be useful, |
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30 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
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31 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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32 | % GNU General Public License for more details. |
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33 | % |
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34 | % You should have received a copy of the GNU General Public License |
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35 | % along with this program; if not, write to the Free Software Foundation, |
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36 | % Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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37 | |
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38 | plot_marker = 0 ; |
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39 | for k=1:2:length(varargin) |
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40 | switch lower(varargin{k}) |
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41 | case 'plotmarker' |
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42 | plot_marker = varargin{k+1} ; |
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43 | otherwise |
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44 | error(['Uknown option ''', varargin{k}, '''.']) ; |
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45 | end |
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46 | end |
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47 | |
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48 | if nargin < 1 |
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49 | N=1; |
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50 | end |
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51 | |
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52 | % -------------------------------------------------------------------- |
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53 | % Do job |
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54 | % -------------------------------------------------------------------- |
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55 | |
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56 | fig = gcf ; |
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57 | |
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58 | is_hold = ishold ; |
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59 | hold on ; |
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60 | |
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61 | bhandler = get(fig,'WindowButtonDownFcn') ; |
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62 | khandler = get(fig,'KeyPressFcn') ; |
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63 | pointer = get(fig,'Pointer') ; |
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64 | |
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65 | set(fig,'WindowButtonDownFcn',@click_handler) ; |
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66 | set(fig,'KeyPressFcn',@key_handler) ; |
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67 | set(fig,'Pointer','crosshair') ; |
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68 | |
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69 | P=[] ; |
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70 | h=[] ; |
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71 | data.exit=0; |
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72 | guidata(fig,data) ; |
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73 | while size(P,2) < N |
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74 | uiwait(fig) ; |
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75 | data = guidata(fig) ; |
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76 | if(data.exit) |
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77 | break ; |
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78 | end |
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79 | P = [P data.P] ; |
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80 | if( plot_marker ) |
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81 | h=[h plot(data.P(1),data.P(2),'rx')] ; |
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82 | end |
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83 | end |
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84 | |
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85 | if ~is_hold |
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86 | hold off ; |
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87 | end |
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88 | |
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89 | if( plot_marker ) |
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90 | pause(.1); |
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91 | delete(h) ; |
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92 | end |
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93 | |
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94 | set(fig,'WindowButtonDownFcn',bhandler) ; |
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95 | set(fig,'KeyPressFcn',khandler) ; |
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96 | set(fig,'Pointer',pointer) ; |
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97 | |
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98 | % ==================================================================== |
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99 | function click_handler(obj,event) |
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100 | % -------------------------------------------------------------------- |
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101 | data = guidata(gcbo) ; |
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102 | |
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103 | P = get(gca, 'CurrentPoint') ; |
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104 | P = [P(1,1); P(1,2)] ; |
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105 | |
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106 | data.P = P ; |
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107 | guidata(obj,data) ; |
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108 | uiresume(gcbo) ; |
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109 | |
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110 | % ==================================================================== |
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111 | function key_handler(obj,event) |
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112 | % -------------------------------------------------------------------- |
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113 | data = guidata(gcbo) ; |
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114 | data.exit = 1 ; |
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115 | guidata(obj,data) ; |
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116 | uiresume(gcbo) ; |
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