Mercurial > octave-nkf
annotate scripts/plot/util/zoom.m @ 19923:e1d7bd38b82b
make pan, rotate3d, and zoom properly toggle state
* pan.m (update_mouse_mode): New subfunction. Also set __mouse_mode__
property when toggling state.
* rotate3d.m: Likewise.
* zoom.m: Likewise.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Mon, 02 Mar 2015 21:00:13 -0500 |
| parents | 9fc020886ae9 |
| children | 065ccb9a1324 |
| rev | line source |
|---|---|
|
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1 ## Copyright (C) 2014-2015 John W. Eaton |
| 19123 | 2 ## |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7 ## the Free Software Foundation; either version 3 of the License, or (at | |
| 8 ## your option) any later version. | |
| 9 ## | |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 16 ## along with Octave; see the file COPYING. If not, see | |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 18 | |
| 19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Command} {} zoom |
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21 ## @deftypefnx {Command} {} zoom (@var{factor}) |
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22 ## @deftypefnx {Command} {} zoom on |
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23 ## @deftypefnx {Command} {} zoom off |
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24 ## @deftypefnx {Command} {} zoom xon |
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25 ## @deftypefnx {Command} {} zoom yon |
| 19123 | 26 ## @deftypefnx {Command} {} zoom out |
| 27 ## @deftypefnx {Command} {} zoom reset | |
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28 ## @deftypefnx {Command} {} zoom (@var{hfig}, @var{option}) |
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29 ## Zoom the current axes object or control the interactive zoom mode of |
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30 ## a figure in the GUI. |
| 19123 | 31 ## |
| 32 ## Given a numeric argument greater than zero, zoom by the given factor. | |
| 33 ## If the zoom factor is greater than one, zoom in on the plot. If the | |
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34 ## factor is less than one, zoom out. If the zoom factor is a two- or |
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35 ## three-element vector, then the elements specify the zoom factors for |
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36 ## the x, y, and z axes respectively. |
| 19123 | 37 ## |
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38 ## Given the option @qcode{"on"} or @qcode{"off"}, set the interactive |
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39 ## zoom mode on or off. |
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40 ## |
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41 ## With no arguments, toggle the current zoom mode on or off. |
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42 ## |
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43 ## Given the option @qcode{"xon"} or @qcode{"yon"}, enable zoom mode |
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44 ## for the x or y axis only. |
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45 ## |
| 19123 | 46 ## Given the option @qcode{"out"}, zoom to the initial zoom setting. |
| 47 ## | |
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48 ## Given the option @qcode{"reset"}, store the current zoom setting so |
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49 ## that @code{zoom out} will return to this zoom level. |
| 19123 | 50 ## |
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51 ## If the first argument @var{hfig} is a figure, then operate on |
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52 ## the given figure rather than the current figure as returned by |
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53 ## @code{gcf}. |
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54 ## |
| 19123 | 55 ## @seealso{pan, rotate3d} |
| 56 ## @end deftypefn | |
| 57 | |
| 58 ## Eventually we need to also support these features: | |
| 59 ## @deftypefnx {Command} {zoom_object_handle =} zoom (@var{hfig}) | |
| 60 | |
| 61 function zoom (varargin) | |
| 62 | |
| 63 nargs = nargin; | |
| 64 if (nargs > 2) | |
| 65 print_usage (); | |
| 66 endif | |
| 67 | |
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68 if (nargs == 1 && nargout > 0 && isfigure (varargin{1})) |
| 19123 | 69 error ("zoom_object_handle = zoom (hfig): not implemented"); |
| 70 endif | |
| 71 | |
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72 hfig = NaN; |
| 19123 | 73 if (nargs == 2) |
| 74 hfig = varargin{1}; | |
| 75 if (isfigure (hfig)) | |
| 76 varargin(1) = []; | |
| 77 nargs--; | |
| 78 else | |
| 79 error ("zoom: expecting figure handle as first argument"); | |
| 80 endif | |
| 81 endif | |
| 82 | |
| 83 if (isnan (hfig)) | |
| 84 hfig = gcf (); | |
| 85 endif | |
| 86 | |
| 87 if (nargs == 0) | |
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88 zm = get (hfig, "__zoom_mode__"); |
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89 if (strcmp (zm.Enable, "on")) |
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90 zm.Enable = "off"; |
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91 else |
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92 zm.Enable = "on"; |
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93 endif |
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94 set (hfig, "__zoom_mode__", zm); |
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95 update_mouse_mode (hfig, zm.Enable); |
| 19123 | 96 elseif (nargs == 1) |
| 97 arg = varargin{1}; | |
| 98 if (isnumeric (arg)) | |
| 99 factor = arg; | |
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100 switch (numel (factor)) |
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101 case 2 |
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102 xfactor = factor(1); |
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103 yfactor = factor(2); |
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104 case 1 |
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105 xfactor = yfactor = factor; |
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106 otherwise |
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107 error ("zoom: invalid factor"); |
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108 endswitch |
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109 if (xfactor < 0 || yfactor < 0) |
| 19123 | 110 error ("zoom: factor must be greater than 1"); |
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111 elseif (xfactor == 1 && yfactor == 1) |
| 19123 | 112 return; |
| 113 endif | |
| 114 cax = get (hfig, "currentaxes"); | |
| 115 if (! isempty (cax)) | |
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116 if (xfactor != 1) |
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117 if (yfactor != 1) |
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118 mode = "both"; |
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119 else |
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120 mode = "horizontal"; |
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121 endif |
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122 else |
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123 if (yfactor != 1) |
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124 mode = "vertical"; |
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125 endif |
| 19123 | 126 endif |
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127 __zoom__ (cax, mode, factor); |
| 19123 | 128 endif |
| 129 elseif (ischar (arg)) | |
| 130 switch (arg) | |
| 131 case {"on", "off", "xon", "yon"} | |
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132 zm = get (hfig, "__zoom_mode__"); |
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133 switch (arg) |
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134 case {"on", "off"} |
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135 zm.Enable = arg; |
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136 zm.Motion = "both"; |
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137 case "xon" |
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138 zm.Enable = "on"; |
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139 zm.Motion = "horizontal"; |
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140 case "yon" |
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141 zm.Enable = "on"; |
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142 zm.Motion = "vertical"; |
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143 endswitch |
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144 set (hfig, "__zoom_mode__", zm); |
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145 update_mouse_mode (hfig, arg); |
| 19123 | 146 case "out" |
| 147 cax = get (hfig, "currentaxes"); | |
| 148 if (! isempty (cax)) | |
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149 __zoom__ (cax, "out"); |
| 19123 | 150 endif |
| 151 case "reset" | |
| 152 cax = get (hfig, "currentaxes"); | |
| 153 if (! isempty (cax)) | |
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154 __zoom__ (cax, "reset"); |
| 19123 | 155 endif |
| 156 otherwise | |
| 157 error ("zoom: unrecognized option '%s'", arg); | |
| 158 endswitch | |
| 159 else | |
| 160 error ("zoom: wrong type argument '%s'", class (arg)); | |
| 161 endif | |
| 162 endif | |
| 163 | |
| 164 endfunction | |
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165 |
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166 function update_mouse_mode (hfig, arg) |
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167 if (strcmp (arg, "off")) |
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168 set (hfig, "__mouse_mode__", "none"); |
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169 else |
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170 ## FIXME: Is there a better way other than calling these |
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171 ## functions to set the other mouse mode Enable fields to |
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172 ## "off"? |
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173 pan ("off"); |
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174 rotate3d ("off"); |
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175 set (hfig, "__mouse_mode__", "zoom"); |
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176 endif |
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177 endfunction |
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178 |
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179 %!demo |
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180 %! clf; |
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181 %! sombrero (); |
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182 %! pause (1); |
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183 %! %% zoom in by a factor of 2 |
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184 %! zoom (2); |
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185 %! pause (1); |
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186 %! %% return to original zoom level |
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187 %! zoom out; |
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188 %! pause (1); |
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189 %! %% zoom in by a factor of 2 |
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190 %! zoom (2); |
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191 %! pause (1); |
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192 %! %% set this zoom level as the "initial zoom level" |
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193 %! %% and zoom in some more |
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194 %! zoom reset; |
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195 %! zoom (2); |
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196 %! pause (1); |
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197 %! %% return to zoom level set by last call to "zoom reset" |
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198 %! zoom out; |
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199 |