Parent Directory
| 
Revision Log
Revision 1050 - (view) (download) (as text)
| 1 : | sh002i | 1050 | #!/usr/math/bin/perl -w |
| 2 : | # this module holds the graph. Several functions | ||
| 3 : | # and labels may be plotted on | ||
| 4 : | # the graph. | ||
| 5 : | |||
| 6 : | # constructor new WWPlot(300,400) constructs an image of width 300 by height 400 pixels | ||
| 7 : | # plot->imageName gives the image's name | ||
| 8 : | |||
| 9 : | |||
| 10 : | =head1 NAME | ||
| 11 : | |||
| 12 : | WWPlot | ||
| 13 : | |||
| 14 : | =head1 SYNPOSIS | ||
| 15 : | |||
| 16 : | use Global; | ||
| 17 : | use Carp; | ||
| 18 : | use GD; | ||
| 19 : | |||
| 20 : | $graph = new WWPlot(400,400); # creates a graph 400 pixels by 400 pixels | ||
| 21 : | $graph->fn($fun1, $fun2); # installs functions $fun1 and $fun2 in $graph | ||
| 22 : | $image_binary = $graph->draw(); # creates the gif/png image of the functions installed in the graph | ||
| 23 : | |||
| 24 : | =head1 DESCRIPTION | ||
| 25 : | |||
| 26 : | This module creates a graph object -- a canvas on which to draw functions, labels, and other symbols. | ||
| 27 : | The graph can be drawn with an axis, with a grid, and/or with an axis with tick marks. | ||
| 28 : | The position of the axes and the granularity of the grid and tick marks can be specified. | ||
| 29 : | |||
| 30 : | =head2 new | ||
| 31 : | |||
| 32 : | $graph = new WWPlot(400,400); | ||
| 33 : | |||
| 34 : | Creates a graph object 400 pixels by 400 pixels. The size is required. | ||
| 35 : | |||
| 36 : | |||
| 37 : | |||
| 38 : | |||
| 39 : | =head2 Methods and properties | ||
| 40 : | |||
| 41 : | =over 4 | ||
| 42 : | |||
| 43 : | =item xmin, xmax, ymin, ymax | ||
| 44 : | |||
| 45 : | These determine the world co-ordinates of the graph. The constructions | ||
| 46 : | |||
| 47 : | $new_xmin = $graph->xmin($new_xmin); | ||
| 48 : | and | ||
| 49 : | $current_xmin = $graph->xmin(); | ||
| 50 : | |||
| 51 : | set and read the values. | ||
| 52 : | |||
| 53 : | =item fn, lb, stamps | ||
| 54 : | |||
| 55 : | These arrays contain references to the functions (fn), the labels (lb) and the stamped images (stamps) such | ||
| 56 : | as open or closed circles which will drawn when the graph is asked to draw itself. Since each of these | ||
| 57 : | objects is expected to draw itself, there is not a strong difference between the different arrays of objects. | ||
| 58 : | The principle difference is the order in which they are drawn. The axis and grids are drawn first, followed | ||
| 59 : | by the functions, then the labels, then the stamps. | ||
| 60 : | |||
| 61 : | You can add a function with either of the commands | ||
| 62 : | |||
| 63 : | @fn = $graph->fn($new_fun_ref1, $new_fun_ref2); | ||
| 64 : | @fn = $graph->install($new_fun_ref1, $new_fun_ref2); | ||
| 65 : | |||
| 66 : | the constructions for labels and stamps are respectively: | ||
| 67 : | |||
| 68 : | @labels = $graph->lb($new_label); | ||
| 69 : | @stamps = $graph->stamps($new_stamp); | ||
| 70 : | |||
| 71 : | while | ||
| 72 : | |||
| 73 : | @functions = $graph->fn(); | ||
| 74 : | |||
| 75 : | will give a list of the current functions (similary for labels and stamps). | ||
| 76 : | |||
| 77 : | Either of the commands | ||
| 78 : | |||
| 79 : | $graph->fn('reset'); | ||
| 80 : | $graph->fn('erase'); | ||
| 81 : | |||
| 82 : | will erase the array containing the functions and similary for the label and stamps arrays. | ||
| 83 : | |||
| 84 : | |||
| 85 : | =item h_axis, v_axis | ||
| 86 : | |||
| 87 : | $h_axis_coordinate = $graph -> h_axis(); | ||
| 88 : | $new_axis = $grpah -> h_axis($new_axis); | ||
| 89 : | |||
| 90 : | Respectively read and set the vertical coordinate value in real world coordinates where the | ||
| 91 : | horizontal axis intersects the vertical one. The same construction reads and sets the coordinate | ||
| 92 : | value for the vertical axis. The axis is drawn more darkly than the grids. | ||
| 93 : | |||
| 94 : | =item h_ticks, v_ticks | ||
| 95 : | |||
| 96 : | @h_ticks = $graph -> h_ticks(); | ||
| 97 : | @h_ticks = $graph -> h_ticks( $tick1, $tick2, $tick3, $tick4 ); | ||
| 98 : | |||
| 99 : | reads and sets the coordinates for the tick marks along the horizontal axis. The values | ||
| 100 : | $tick1, etc are the real world coordinate values for each of the tick marks. | ||
| 101 : | |||
| 102 : | =item h_grid, v_grid | ||
| 103 : | |||
| 104 : | @h_grid = $graph -> h_grid(); | ||
| 105 : | @h_grid = $graph -> h_grid( $grid1, $grid2, $grid3, $grid4 ); | ||
| 106 : | |||
| 107 : | reads and sets the verical coordinates for the horizontal grid lines. The values | ||
| 108 : | $grid1, etc are the real world coordinate values where the horizontal grid meets the | ||
| 109 : | vertical axis. | ||
| 110 : | |||
| 111 : | =item draw | ||
| 112 : | |||
| 113 : | $image = $graph ->draw(); | ||
| 114 : | |||
| 115 : | Draws the image of the graph. | ||
| 116 : | |||
| 117 : | =item size | ||
| 118 : | |||
| 119 : | ($horizontal_pixels, $vertical_pixels) = $graph ->size(); | ||
| 120 : | |||
| 121 : | Reads the size of the graph image in pixels. This cannot be reset. It is defined by | ||
| 122 : | the new constructor and cannot be changed. | ||
| 123 : | |||
| 124 : | =item colors | ||
| 125 : | |||
| 126 : | %colors =$graph->colors(); | ||
| 127 : | |||
| 128 : | Returns the hash containing the colors known to the graph. The keys are the names of the | ||
| 129 : | colors and the values are the color indices used by the graph. | ||
| 130 : | |||
| 131 : | =item new_color | ||
| 132 : | |||
| 133 : | $graph->new_color('white', 255,255,255); | ||
| 134 : | |||
| 135 : | defines a new color named white with red, green and blue densities 255. | ||
| 136 : | |||
| 137 : | =item im | ||
| 138 : | |||
| 139 : | $GD_image = $graph->im(); | ||
| 140 : | |||
| 141 : | Allows access to the GD image object contained in the graph object. You can use this | ||
| 142 : | to access methods defined in GD but not supported directly by WWPlot. (See the documentation | ||
| 143 : | for GD.) | ||
| 144 : | |||
| 145 : | =item moveTo, lineTo | ||
| 146 : | |||
| 147 : | $graph->moveTo($x,$y); | ||
| 148 : | $graph->lineTo($x,$y,$color); | ||
| 149 : | |||
| 150 : | Moves to the point ($x, $y) (defined in real world coordinates) or draws a line from the | ||
| 151 : | current position to the specified point ($x, $y) using the color $color. $color is the | ||
| 152 : | name, e.g. 'white', of the color, not an index value or RGB specification. These are | ||
| 153 : | low level call back routines used by the function, label and stamp objects to draw themselves. | ||
| 154 : | |||
| 155 : | |||
| 156 : | =item ii, jj | ||
| 157 : | |||
| 158 : | These functions translate from real world to pixel coordinates. | ||
| 159 : | |||
| 160 : | $pixels_down_from_top = $graph -> jj($y); | ||
| 161 : | |||
| 162 : | |||
| 163 : | =back | ||
| 164 : | |||
| 165 : | =cut | ||
| 166 : | |||
| 167 : | BEGIN { | ||
| 168 : | be_strict(); # an alias for use strict. This means that all global variable must contain main:: as a prefix. | ||
| 169 : | |||
| 170 : | } | ||
| 171 : | package WWPlot; | ||
| 172 : | |||
| 173 : | |||
| 174 : | #use Exporter; | ||
| 175 : | #use DynaLoader; | ||
| 176 : | #use GD; | ||
| 177 : | |||
| 178 : | @WWPlot::ISA=undef; | ||
| 179 : | $WWPlot::AUTOLOAD = undef; | ||
| 180 : | |||
| 181 : | @WWPlot::ISA = qw(GD); | ||
| 182 : | |||
| 183 : | |||
| 184 : | if ( $GD::VERSION > '1.20' ) { | ||
| 185 : | $WWPlot::use_png = 1; # in version 1.20 and later of GD, gif's are not supported by png files are | ||
| 186 : | # This only affects the draw method. | ||
| 187 : | } else { | ||
| 188 : | $WWPlot::use_png = 0; | ||
| 189 : | } | ||
| 190 : | |||
| 191 : | my $last_image_number=0; #class variable. Keeps track of how many images have been made. | ||
| 192 : | |||
| 193 : | |||
| 194 : | |||
| 195 : | my %fields = ( # initialization only!!! | ||
| 196 : | xmin => -1, | ||
| 197 : | xmax => 1, | ||
| 198 : | ymin => -1, | ||
| 199 : | ymax => 1, | ||
| 200 : | imageName => undef, | ||
| 201 : | position => undef, #used internally in the draw routine lineTo | ||
| 202 : | ); | ||
| 203 : | |||
| 204 : | |||
| 205 : | |||
| 206 : | sub new { | ||
| 207 : | my $class =shift; | ||
| 208 : | my @size = @_; # the dimensions in pixels of the image | ||
| 209 : | my $self = { im => new GD::Image(@size), | ||
| 210 : | '_permitted' => \%fields, | ||
| 211 : | %fields, | ||
| 212 : | size => [@size], | ||
| 213 : | fn => [], | ||
| 214 : | fillRegion => [], | ||
| 215 : | lb => [], | ||
| 216 : | stamps => [], | ||
| 217 : | colors => {}, | ||
| 218 : | hticks => [], | ||
| 219 : | vticks => [], | ||
| 220 : | hgrid => [], | ||
| 221 : | vgrid => [], | ||
| 222 : | haxis => [], | ||
| 223 : | vaxis => [], | ||
| 224 : | |||
| 225 : | |||
| 226 : | }; | ||
| 227 : | |||
| 228 : | bless $self, $class; | ||
| 229 : | $self -> _initialize; | ||
| 230 : | return $self; | ||
| 231 : | } | ||
| 232 : | |||
| 233 : | # access methods for function list, label list and image | ||
| 234 : | sub fn { | ||
| 235 : | my $self = shift; | ||
| 236 : | |||
| 237 : | if (@_ == 0) { | ||
| 238 : | # do nothing if input is empty | ||
| 239 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 240 : | $self->{fn} = []; | ||
| 241 : | } else { | ||
| 242 : | push(@{$self->{fn}},@_) if @_; | ||
| 243 : | } | ||
| 244 : | @{$self->{fn}}; | ||
| 245 : | } | ||
| 246 : | # access methods for fillRegion list, label list and image | ||
| 247 : | sub fillRegion { | ||
| 248 : | my $self = shift; | ||
| 249 : | |||
| 250 : | if (@_ == 0) { | ||
| 251 : | # do nothing if input is empty | ||
| 252 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 253 : | $self->{fillRegion} = []; | ||
| 254 : | } else { | ||
| 255 : | push(@{$self->{fillRegion}},@_) if @_; | ||
| 256 : | } | ||
| 257 : | @{$self->{fillRegion}}; | ||
| 258 : | } | ||
| 259 : | |||
| 260 : | sub install { # synonym for installing a function | ||
| 261 : | fn(@_); | ||
| 262 : | } | ||
| 263 : | |||
| 264 : | sub lb { | ||
| 265 : | my $self = shift; | ||
| 266 : | if (@_ == 0) { | ||
| 267 : | # do nothing if input is empty | ||
| 268 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 269 : | $self->{lb} = []; | ||
| 270 : | } else { | ||
| 271 : | push(@{$self->{lb}},@_) if @_; | ||
| 272 : | } | ||
| 273 : | |||
| 274 : | @{$self->{lb}}; | ||
| 275 : | } | ||
| 276 : | |||
| 277 : | sub stamps { | ||
| 278 : | my $self = shift; | ||
| 279 : | if (@_ == 0) { | ||
| 280 : | # do nothing if input is empty | ||
| 281 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 282 : | $self->{stamps} = []; | ||
| 283 : | } else { | ||
| 284 : | push(@{$self->{stamps}},@_) if @_; | ||
| 285 : | } | ||
| 286 : | |||
| 287 : | @{$self->{stamps}}; | ||
| 288 : | } | ||
| 289 : | sub colors { | ||
| 290 : | my $self = shift; | ||
| 291 : | $self -> {colors} ; | ||
| 292 : | } | ||
| 293 : | |||
| 294 : | sub new_color { | ||
| 295 : | my $self = shift; | ||
| 296 : | my ($color,$r,$g,$b) = @_; | ||
| 297 : | $self->{'colors'}{$color} = $self->im->colorAllocate($r, $g, $b); | ||
| 298 : | } | ||
| 299 : | sub im { | ||
| 300 : | my $self = shift; | ||
| 301 : | $self->{im}; | ||
| 302 : | } | ||
| 303 : | sub gifName { # This is yields backwards compatibility. | ||
| 304 : | my $self = shift; | ||
| 305 : | $self->imageName(@_); | ||
| 306 : | } | ||
| 307 : | sub pngName { # It is better to use the method imageName. | ||
| 308 : | my $self = shift; | ||
| 309 : | $self->imageName(@_); | ||
| 310 : | } | ||
| 311 : | sub size { | ||
| 312 : | my $self = shift; | ||
| 313 : | $self ->{size}; | ||
| 314 : | } | ||
| 315 : | |||
| 316 : | sub _initialize { | ||
| 317 : | my $self = shift; | ||
| 318 : | $self->{position} = [0,0]; | ||
| 319 : | # $self->{width} = $self->{'size'}[0]; # original height and width tags match pixel dimensions | ||
| 320 : | # $self->{height} = $self->{'size'}[1]; # of the image | ||
| 321 : | # allocate some colors | ||
| 322 : | $self->{'colors'}{'background_color'} = $self->im->colorAllocate(255,255,255); | ||
| 323 : | $self->{'colors'}{'default_color'} = $self->im->colorAllocate(0,0,0); | ||
| 324 : | $self->{'colors'}{'white'} = $self->im->colorAllocate(255,255,255); | ||
| 325 : | $self->{'colors'}{'black'} = $self->im->colorAllocate(0,0,0); | ||
| 326 : | $self->{'colors'}{'red'} = $self->im->colorAllocate(255,0,0); | ||
| 327 : | $self->{'colors'}{'green'} = $self->im->colorAllocate(0,255,0); | ||
| 328 : | $self->{'colors'}{'blue'} = $self->im->colorAllocate(0,0,255); | ||
| 329 : | $self->{'colors'}{'yellow'} = $self->im->colorAllocate(255,255,0); | ||
| 330 : | $self->{'colors'}{'orange'} = $self->im->colorAllocate(255,100,0); | ||
| 331 : | $self->{'colors'}{'gray'} = $self->im->colorAllocate(180,180,180); | ||
| 332 : | $self->{'colors'}{'nearwhite'} = $self->im->colorAllocate(254,254,254); | ||
| 333 : | # obtain a new imageNumber; | ||
| 334 : | $self->{imageNumber} = ++$last_image_number; | ||
| 335 : | } | ||
| 336 : | |||
| 337 : | # reference shapes | ||
| 338 : | # closed circle | ||
| 339 : | # open circle | ||
| 340 : | |||
| 341 : | # The translation subroutines. | ||
| 342 : | |||
| 343 : | sub ii { | ||
| 344 : | my $self = shift; | ||
| 345 : | my $x = shift; | ||
| 346 : | return undef unless defined($x); | ||
| 347 : | my $xmax = $self-> xmax ; | ||
| 348 : | my $xmin = $self-> xmin ; | ||
| 349 : | int( ($x - $xmin)*(@{$self->size}[0]) / ($xmax - $xmin) ); | ||
| 350 : | } | ||
| 351 : | |||
| 352 : | sub jj { | ||
| 353 : | my $self = shift; | ||
| 354 : | my $y = shift; | ||
| 355 : | return undef unless defined($y); | ||
| 356 : | my $ymax = $self->ymax; | ||
| 357 : | my $ymin = $self->ymin; | ||
| 358 : | #print "ymax=$ymax y=$y ymin=$ymin size=",${$self->size}[1],"<BR><BR><BR><BR>"; | ||
| 359 : | int( ($ymax - $y)*${$self->size}[1]/($ymax-$ymin) ); | ||
| 360 : | } | ||
| 361 : | |||
| 362 : | # The move and draw subroutines. Arguments are in real world coordinates. | ||
| 363 : | |||
| 364 : | sub lineTo { | ||
| 365 : | my $self = shift; | ||
| 366 : | my ($x,$y,$color) = @_; | ||
| 367 : | $x=$self->ii($x); | ||
| 368 : | $y=$self->jj($y); | ||
| 369 : | $color = $self->{'colors'}{$color} if $color=~/[A-Za-z]+/ && defined($self->{'colors'}{$color}) ; # colors referenced by name works here. | ||
| 370 : | $color = $self->{'colors'}{'default_color'} unless defined($color); | ||
| 371 : | $self->im->line(@{$self->position},$x,$y,$color); | ||
| 372 : | #warn "color is $color"; | ||
| 373 : | @{$self->position} = ($x,$y); | ||
| 374 : | } | ||
| 375 : | |||
| 376 : | sub moveTo { | ||
| 377 : | my $self = shift; | ||
| 378 : | my $x=shift; | ||
| 379 : | my $y=shift; | ||
| 380 : | $x=$self->ii($x); | ||
| 381 : | $y=$self->jj($y); | ||
| 382 : | #print "moving to $x,$y<BR>"; | ||
| 383 : | @{$self->position} = ( $x,$y ); | ||
| 384 : | } | ||
| 385 : | |||
| 386 : | sub v_axis { | ||
| 387 : | my $self = shift; | ||
| 388 : | @{$self->{vaxis}}=@_; # y_value, color | ||
| 389 : | } | ||
| 390 : | sub h_axis { | ||
| 391 : | my $self = shift; | ||
| 392 : | @{$self->{haxis}}=@_; # x_value, color | ||
| 393 : | } | ||
| 394 : | sub h_ticks { | ||
| 395 : | my $self = shift; | ||
| 396 : | my $nudge =2; | ||
| 397 : | push(@{$self->{hticks}},$nudge,@_); # y-value, color, tick x-values. see save_image subroutine | ||
| 398 : | |||
| 399 : | } | ||
| 400 : | sub v_ticks { | ||
| 401 : | my $self = shift; | ||
| 402 : | my $nudge =2; | ||
| 403 : | push(@{$self->{vticks}},$nudge,@_); # x-value, color, tick y-values. see save_image subroutine | ||
| 404 : | |||
| 405 : | } | ||
| 406 : | sub h_grid { | ||
| 407 : | my $self = shift; | ||
| 408 : | push(@{$self->{hgrid}}, @_ ); #color, grid y values | ||
| 409 : | } | ||
| 410 : | sub v_grid { | ||
| 411 : | my $self = shift; | ||
| 412 : | push(@{$self->{vgrid}},@_ ); #color, grid x values | ||
| 413 : | } | ||
| 414 : | |||
| 415 : | |||
| 416 : | |||
| 417 : | sub draw { | ||
| 418 : | my $self = shift; | ||
| 419 : | my $im =$self->{'im'}; | ||
| 420 : | my @size = @{$self->size}; | ||
| 421 : | my %colors =%{$self->colors}; | ||
| 422 : | |||
| 423 : | # make the background transparent and interlaced | ||
| 424 : | # $im->transparent($colors{'white'}); | ||
| 425 : | $im->interlaced('true'); | ||
| 426 : | |||
| 427 : | # Put a black frame around the picture | ||
| 428 : | $im->rectangle(0,0,$size[0]-1,$size[1]-1,$colors{'black'}); | ||
| 429 : | |||
| 430 : | # draw functions | ||
| 431 : | |||
| 432 : | foreach my $f ($self->fn) { | ||
| 433 : | #$self->draw_function($f); | ||
| 434 : | $f->draw($self); # the graph is passed to the function so that the label can call back as needed. | ||
| 435 : | } | ||
| 436 : | # and fill the regions | ||
| 437 : | foreach my $r ($self->fillRegion) { | ||
| 438 : | my ($x,$y,$color_name) = @{$r}; | ||
| 439 : | my $color = ${$self->colors}{$color_name}; | ||
| 440 : | $self->im->fill($self->ii($x),$self->jj($y),$color); | ||
| 441 : | } | ||
| 442 : | |||
| 443 : | #draw hticks | ||
| 444 : | my $tk; | ||
| 445 : | my @ticks = @{$self->{hticks}}; | ||
| 446 : | if (@ticks) { | ||
| 447 : | my $nudge = shift(@ticks); | ||
| 448 : | my $j = $self->jj(shift(@ticks)); | ||
| 449 : | my $tk_clr= $self->{'colors'}{shift(@ticks)}; | ||
| 450 : | |||
| 451 : | foreach $tk (@ticks) { | ||
| 452 : | $tk = $self->ii($tk); | ||
| 453 : | # print "tk=$tk\n"; | ||
| 454 : | $self->im->line($tk,$j+int($nudge),$tk,$j-int($nudge),$tk_clr); | ||
| 455 : | } | ||
| 456 : | } | ||
| 457 : | #draw vticks | ||
| 458 : | @ticks = @{$self->{vticks}}; | ||
| 459 : | if (@ticks) { | ||
| 460 : | my $nudge = shift(@ticks); | ||
| 461 : | my $i = $self->ii(shift(@ticks)); | ||
| 462 : | my $tk_clr= $self->{'colors'}{shift(@ticks)}; | ||
| 463 : | |||
| 464 : | foreach $tk (@ticks) { | ||
| 465 : | $tk = $self->jj($tk); | ||
| 466 : | # print "tk=$tk\n"; | ||
| 467 : | $self->im->line($i+int($nudge),$tk,$i-int($nudge),$tk,$tk_clr); | ||
| 468 : | } | ||
| 469 : | } | ||
| 470 : | #draw vgrid | ||
| 471 : | |||
| 472 : | my @grid = @{$self->{vgrid}}; | ||
| 473 : | if (@grid) { | ||
| 474 : | my $x_value; | ||
| 475 : | my $grid_clr= $self->{'colors'}{shift(@grid)}; | ||
| 476 : | |||
| 477 : | foreach $x_value (@grid) { | ||
| 478 : | $x_value = $self->ii($x_value); # scale | ||
| 479 : | #print "grid_line=$grid_line\n"; | ||
| 480 : | $self->im->dashedLine($x_value,0,$x_value,$self->{'size'}[1],$grid_clr); | ||
| 481 : | } | ||
| 482 : | } | ||
| 483 : | #draw hgrid | ||
| 484 : | @grid = @{$self->{hgrid}}; | ||
| 485 : | if (@grid) { | ||
| 486 : | my $grid_clr= $self->{'colors'}{shift(@grid)}; | ||
| 487 : | my $y_value; | ||
| 488 : | foreach $y_value (@grid) { | ||
| 489 : | $y_value = $self->jj($y_value); | ||
| 490 : | #print "y_value=$y_value\n"; | ||
| 491 : | #print "width= $self->{width}\n"; | ||
| 492 : | $self->im->dashedLine(0,$y_value,$self->{'size'}[0],$y_value,$grid_clr); | ||
| 493 : | } | ||
| 494 : | } | ||
| 495 : | # draw axes | ||
| 496 : | if (defined ${$self->{vaxis}}[0]) { | ||
| 497 : | my ($x, $color_name) = @{$self->{vaxis}}; | ||
| 498 : | my $color = ${$self->colors}{$color_name}; | ||
| 499 : | $self->moveTo($x,$self->ymin); | ||
| 500 : | $self->lineTo($x,$self->ymax,$color); | ||
| 501 : | #print "draw vaxis", @{$self->{vaxis}},"\n"; | ||
| 502 : | #$self->im->line(0,0,300,300,$color); | ||
| 503 : | } | ||
| 504 : | if (defined $self->{haxis}[0]) { | ||
| 505 : | my ($y, $color_name) = @{$self->{haxis}}; | ||
| 506 : | my $color = ${$self->colors}{$color_name}; | ||
| 507 : | $self->moveTo($self->xmin,$y); | ||
| 508 : | $self->lineTo($self->xmax,$y,$color); | ||
| 509 : | #print "draw haxis", @{$self->{haxis}},"\n"; | ||
| 510 : | } | ||
| 511 : | # draw functions again | ||
| 512 : | |||
| 513 : | foreach my $f ($self->fn) { | ||
| 514 : | #$self->draw_function($f); | ||
| 515 : | $f->draw($self); # the graph is passed to the function so that the label can call back as needed. | ||
| 516 : | } | ||
| 517 : | |||
| 518 : | |||
| 519 : | #draw labels | ||
| 520 : | my $lb; | ||
| 521 : | foreach $lb ($self->lb) { | ||
| 522 : | $lb->draw($self); # the graph is passed to the label so that the label can call back as needed. | ||
| 523 : | } | ||
| 524 : | #draw stamps | ||
| 525 : | my $stamp; | ||
| 526 : | foreach $stamp ($self->stamps) { | ||
| 527 : | $stamp->draw($self); # the graph is passed to the label so that the label can call back as needed. | ||
| 528 : | } | ||
| 529 : | my $out; | ||
| 530 : | if ($WWPlot::use_png) { | ||
| 531 : | $out = $im->png; | ||
| 532 : | } else { | ||
| 533 : | $out = $im->gif; | ||
| 534 : | } | ||
| 535 : | $out; | ||
| 536 : | |||
| 537 : | } | ||
| 538 : | |||
| 539 : | |||
| 540 : | |||
| 541 : | sub AUTOLOAD { | ||
| 542 : | my $self = shift; | ||
| 543 : | my $type = ref($self) || die "$self is not an object"; | ||
| 544 : | my $name = $WWPlot::AUTOLOAD; | ||
| 545 : | $name =~ s/.*://; # strip fully-qualified portion | ||
| 546 : | unless (exists $self->{'_permitted'}->{$name} ) { | ||
| 547 : | die "Can't find '$name' field in object of class $type"; | ||
| 548 : | } | ||
| 549 : | if (@_) { | ||
| 550 : | return $self->{$name} = shift; | ||
| 551 : | } else { | ||
| 552 : | return $self->{$name}; | ||
| 553 : | } | ||
| 554 : | |||
| 555 : | } | ||
| 556 : | |||
| 557 : | |||
| 558 : | sub DESTROY { | ||
| 559 : | # doing nothing about destruction, hope that isn't dangerous | ||
| 560 : | } | ||
| 561 : | |||
| 562 : | sub save_image { | ||
| 563 : | my $self = shift; | ||
| 564 : | warn "The method save_image is no longer supported. Use insertGraph(\$graph)"; | ||
| 565 : | "The method save_image is no longer supported. Use insertGraph(\$graph)"; | ||
| 566 : | } | ||
| 567 : | |||
| 568 : | |||
| 569 : | 1; |
| aubreyja at gmail dot com | ViewVC Help |
| Powered by ViewVC 1.0.9 |