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| 1 : | apizer | 1079 | |
| 2 : | # this module holds the graph. Several functions | ||
| 3 : | sh002i | 1050 | # 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 : | gage | 6503 | |
| 17 : | sh002i | 1050 | $graph = new WWPlot(400,400); # creates a graph 400 pixels by 400 pixels |
| 18 : | $graph->fn($fun1, $fun2); # installs functions $fun1 and $fun2 in $graph | ||
| 19 : | $image_binary = $graph->draw(); # creates the gif/png image of the functions installed in the graph | ||
| 20 : | |||
| 21 : | =head1 DESCRIPTION | ||
| 22 : | |||
| 23 : | This module creates a graph object -- a canvas on which to draw functions, labels, and other symbols. | ||
| 24 : | apizer | 1079 | The graph can be drawn with an axis, with a grid, and/or with an axis with tick marks. |
| 25 : | sh002i | 1050 | The position of the axes and the granularity of the grid and tick marks can be specified. |
| 26 : | |||
| 27 : | =head2 new | ||
| 28 : | |||
| 29 : | $graph = new WWPlot(400,400); | ||
| 30 : | |||
| 31 : | Creates a graph object 400 pixels by 400 pixels. The size is required. | ||
| 32 : | |||
| 33 : | |||
| 34 : | |||
| 35 : | |||
| 36 : | =head2 Methods and properties | ||
| 37 : | |||
| 38 : | =over 4 | ||
| 39 : | |||
| 40 : | =item xmin, xmax, ymin, ymax | ||
| 41 : | |||
| 42 : | These determine the world co-ordinates of the graph. The constructions | ||
| 43 : | |||
| 44 : | $new_xmin = $graph->xmin($new_xmin); | ||
| 45 : | and | ||
| 46 : | $current_xmin = $graph->xmin(); | ||
| 47 : | |||
| 48 : | apizer | 1079 | set and read the values. |
| 49 : | sh002i | 1050 | |
| 50 : | =item fn, lb, stamps | ||
| 51 : | |||
| 52 : | These arrays contain references to the functions (fn), the labels (lb) and the stamped images (stamps) such | ||
| 53 : | as open or closed circles which will drawn when the graph is asked to draw itself. Since each of these | ||
| 54 : | objects is expected to draw itself, there is not a strong difference between the different arrays of objects. | ||
| 55 : | The principle difference is the order in which they are drawn. The axis and grids are drawn first, followed | ||
| 56 : | by the functions, then the labels, then the stamps. | ||
| 57 : | |||
| 58 : | You can add a function with either of the commands | ||
| 59 : | |||
| 60 : | @fn = $graph->fn($new_fun_ref1, $new_fun_ref2); | ||
| 61 : | @fn = $graph->install($new_fun_ref1, $new_fun_ref2); | ||
| 62 : | |||
| 63 : | the constructions for labels and stamps are respectively: | ||
| 64 : | |||
| 65 : | @labels = $graph->lb($new_label); | ||
| 66 : | @stamps = $graph->stamps($new_stamp); | ||
| 67 : | |||
| 68 : | apizer | 1079 | while |
| 69 : | |||
| 70 : | sh002i | 1050 | @functions = $graph->fn(); |
| 71 : | |||
| 72 : | will give a list of the current functions (similary for labels and stamps). | ||
| 73 : | |||
| 74 : | Either of the commands | ||
| 75 : | |||
| 76 : | apizer | 1079 | $graph->fn('reset'); |
| 77 : | sh002i | 1050 | $graph->fn('erase'); |
| 78 : | |||
| 79 : | apizer | 1079 | will erase the array containing the functions and similary for the label and stamps arrays. |
| 80 : | sh002i | 1050 | |
| 81 : | |||
| 82 : | =item h_axis, v_axis | ||
| 83 : | |||
| 84 : | $h_axis_coordinate = $graph -> h_axis(); | ||
| 85 : | $new_axis = $grpah -> h_axis($new_axis); | ||
| 86 : | |||
| 87 : | Respectively read and set the vertical coordinate value in real world coordinates where the | ||
| 88 : | apizer | 1079 | horizontal axis intersects the vertical one. The same construction reads and sets the coordinate |
| 89 : | sh002i | 1050 | value for the vertical axis. The axis is drawn more darkly than the grids. |
| 90 : | |||
| 91 : | =item h_ticks, v_ticks | ||
| 92 : | |||
| 93 : | @h_ticks = $graph -> h_ticks(); | ||
| 94 : | @h_ticks = $graph -> h_ticks( $tick1, $tick2, $tick3, $tick4 ); | ||
| 95 : | |||
| 96 : | reads and sets the coordinates for the tick marks along the horizontal axis. The values | ||
| 97 : | $tick1, etc are the real world coordinate values for each of the tick marks. | ||
| 98 : | |||
| 99 : | =item h_grid, v_grid | ||
| 100 : | |||
| 101 : | @h_grid = $graph -> h_grid(); | ||
| 102 : | @h_grid = $graph -> h_grid( $grid1, $grid2, $grid3, $grid4 ); | ||
| 103 : | |||
| 104 : | reads and sets the verical coordinates for the horizontal grid lines. The values | ||
| 105 : | $grid1, etc are the real world coordinate values where the horizontal grid meets the | ||
| 106 : | vertical axis. | ||
| 107 : | |||
| 108 : | =item draw | ||
| 109 : | |||
| 110 : | $image = $graph ->draw(); | ||
| 111 : | apizer | 1079 | |
| 112 : | sh002i | 1050 | Draws the image of the graph. |
| 113 : | |||
| 114 : | =item size | ||
| 115 : | |||
| 116 : | gage | 3295 | ($horizontal_pixels, $vertical_pixels) = @{$graph ->size()}; |
| 117 : | sh002i | 1050 | |
| 118 : | Reads the size of the graph image in pixels. This cannot be reset. It is defined by | ||
| 119 : | gage | 3295 | the new constructor and cannot be changed. |
| 120 : | sh002i | 1050 | |
| 121 : | =item colors | ||
| 122 : | |||
| 123 : | %colors =$graph->colors(); | ||
| 124 : | |||
| 125 : | Returns the hash containing the colors known to the graph. The keys are the names of the | ||
| 126 : | colors and the values are the color indices used by the graph. | ||
| 127 : | |||
| 128 : | =item new_color | ||
| 129 : | |||
| 130 : | $graph->new_color('white', 255,255,255); | ||
| 131 : | |||
| 132 : | defines a new color named white with red, green and blue densities 255. | ||
| 133 : | |||
| 134 : | =item im | ||
| 135 : | |||
| 136 : | $GD_image = $graph->im(); | ||
| 137 : | |||
| 138 : | Allows access to the GD image object contained in the graph object. You can use this | ||
| 139 : | to access methods defined in GD but not supported directly by WWPlot. (See the documentation | ||
| 140 : | for GD.) | ||
| 141 : | |||
| 142 : | glarose | 6038 | =item moveTo, lineTo, arrowTo |
| 143 : | sh002i | 1050 | |
| 144 : | $graph->moveTo($x,$y); | ||
| 145 : | $graph->lineTo($x,$y,$color); | ||
| 146 : | glarose | 6038 | $graph->lineTo($x,$y,$color,$thickness); |
| 147 : | glarose | 6039 | $graph->lineTo($x,$y,$color,$thickness,'dashed'); |
| 148 : | glarose | 6038 | $graph->arrowTo($x,$y,$color); |
| 149 : | $graph->arrowTo($x,$y,$color,$thickness); | ||
| 150 : | glarose | 6039 | $graph->arrowTo($x,$y,$color,$thickness,'dashed'); |
| 151 : | sh002i | 1050 | |
| 152 : | glarose | 6038 | Moves to the point ($x, $y) (defined in real world coordinates) or draws a line or arrow |
| 153 : | from the current position to the specified point ($x, $y) using the color $color. $color | ||
| 154 : | is the name, e.g. 'white', of the color, not an index value or RGB specification. | ||
| 155 : | glarose | 6039 | $thickness gives the thickness of the line or arrow to draw. If 'dashed' is specified, |
| 156 : | the line or arrow is rendered with a dashed line. These are low level call | ||
| 157 : | glarose | 6038 | back routines used by the function, label and stamp objects to draw themselves. |
| 158 : | sh002i | 1050 | |
| 159 : | =item ii, jj | ||
| 160 : | |||
| 161 : | These functions translate from real world to pixel coordinates. | ||
| 162 : | |||
| 163 : | $pixels_down_from_top = $graph -> jj($y); | ||
| 164 : | |||
| 165 : | |||
| 166 : | =back | ||
| 167 : | |||
| 168 : | =cut | ||
| 169 : | |||
| 170 : | BEGIN { | ||
| 171 : | be_strict(); # an alias for use strict. This means that all global variable must contain main:: as a prefix. | ||
| 172 : | apizer | 1079 | |
| 173 : | sh002i | 1050 | } |
| 174 : | package WWPlot; | ||
| 175 : | |||
| 176 : | |||
| 177 : | #use Exporter; | ||
| 178 : | #use DynaLoader; | ||
| 179 : | #use GD; | ||
| 180 : | |||
| 181 : | @WWPlot::ISA=undef; | ||
| 182 : | $WWPlot::AUTOLOAD = undef; | ||
| 183 : | gage | 6376 | @WWPlot::ISA = qw(GD PGcore); |
| 184 : | sh002i | 1050 | |
| 185 : | |||
| 186 : | if ( $GD::VERSION > '1.20' ) { | ||
| 187 : | $WWPlot::use_png = 1; # in version 1.20 and later of GD, gif's are not supported by png files are | ||
| 188 : | # This only affects the draw method. | ||
| 189 : | } else { | ||
| 190 : | $WWPlot::use_png = 0; | ||
| 191 : | } | ||
| 192 : | |||
| 193 : | my $last_image_number=0; #class variable. Keeps track of how many images have been made. | ||
| 194 : | |||
| 195 : | |||
| 196 : | |||
| 197 : | my %fields = ( # initialization only!!! | ||
| 198 : | xmin => -1, | ||
| 199 : | xmax => 1, | ||
| 200 : | ymin => -1, | ||
| 201 : | ymax => 1, | ||
| 202 : | gage | 6346 | imageName => undef, |
| 203 : | apizer | 1079 | position => undef, #used internally in the draw routine lineTo |
| 204 : | sh002i | 1050 | ); |
| 205 : | |||
| 206 : | |||
| 207 : | |||
| 208 : | sub new { | ||
| 209 : | my $class =shift; | ||
| 210 : | my @size = @_; # the dimensions in pixels of the image | ||
| 211 : | my $self = { im => new GD::Image(@size), | ||
| 212 : | %fields, | ||
| 213 : | size => [@size], | ||
| 214 : | fn => [], | ||
| 215 : | fillRegion => [], | ||
| 216 : | lb => [], | ||
| 217 : | stamps => [], | ||
| 218 : | colors => {}, | ||
| 219 : | hticks => [], | ||
| 220 : | vticks => [], | ||
| 221 : | hgrid => [], | ||
| 222 : | vgrid => [], | ||
| 223 : | haxis => [], | ||
| 224 : | vaxis => [], | ||
| 225 : | |||
| 226 : | apizer | 1079 | |
| 227 : | sh002i | 1050 | }; |
| 228 : | apizer | 1079 | |
| 229 : | sh002i | 1050 | bless $self, $class; |
| 230 : | $self -> _initialize; | ||
| 231 : | return $self; | ||
| 232 : | } | ||
| 233 : | |||
| 234 : | # access methods for function list, label list and image | ||
| 235 : | sub fn { | ||
| 236 : | my $self = shift; | ||
| 237 : | apizer | 1079 | |
| 238 : | sh002i | 1050 | if (@_ == 0) { |
| 239 : | # do nothing if input is empty | ||
| 240 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 241 : | $self->{fn} = []; | ||
| 242 : | } else { | ||
| 243 : | push(@{$self->{fn}},@_) if @_; | ||
| 244 : | } | ||
| 245 : | @{$self->{fn}}; | ||
| 246 : | } | ||
| 247 : | # access methods for fillRegion list, label list and image | ||
| 248 : | sub fillRegion { | ||
| 249 : | my $self = shift; | ||
| 250 : | apizer | 1079 | |
| 251 : | sh002i | 1050 | if (@_ == 0) { |
| 252 : | # do nothing if input is empty | ||
| 253 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 254 : | $self->{fillRegion} = []; | ||
| 255 : | } else { | ||
| 256 : | push(@{$self->{fillRegion}},@_) if @_; | ||
| 257 : | } | ||
| 258 : | @{$self->{fillRegion}}; | ||
| 259 : | } | ||
| 260 : | |||
| 261 : | sub install { # synonym for installing a function | ||
| 262 : | fn(@_); | ||
| 263 : | } | ||
| 264 : | |||
| 265 : | sub lb { | ||
| 266 : | my $self = shift; | ||
| 267 : | if (@_ == 0) { | ||
| 268 : | # do nothing if input is empty | ||
| 269 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 270 : | $self->{lb} = []; | ||
| 271 : | } else { | ||
| 272 : | push(@{$self->{lb}},@_) if @_; | ||
| 273 : | } | ||
| 274 : | |||
| 275 : | @{$self->{lb}}; | ||
| 276 : | } | ||
| 277 : | |||
| 278 : | sub stamps { | ||
| 279 : | my $self = shift; | ||
| 280 : | if (@_ == 0) { | ||
| 281 : | # do nothing if input is empty | ||
| 282 : | } elsif ($_[0] eq 'reset' or $_[0] eq 'erase' ) { | ||
| 283 : | $self->{stamps} = []; | ||
| 284 : | } else { | ||
| 285 : | push(@{$self->{stamps}},@_) if @_; | ||
| 286 : | } | ||
| 287 : | apizer | 1079 | |
| 288 : | sh002i | 1050 | @{$self->{stamps}}; |
| 289 : | } | ||
| 290 : | sub colors { | ||
| 291 : | my $self = shift; | ||
| 292 : | $self -> {colors} ; | ||
| 293 : | } | ||
| 294 : | |||
| 295 : | sub new_color { | ||
| 296 : | my $self = shift; | ||
| 297 : | my ($color,$r,$g,$b) = @_; | ||
| 298 : | $self->{'colors'}{$color} = $self->im->colorAllocate($r, $g, $b); | ||
| 299 : | } | ||
| 300 : | sub im { | ||
| 301 : | my $self = shift; | ||
| 302 : | $self->{im}; | ||
| 303 : | } | ||
| 304 : | sub gifName { # This is yields backwards compatibility. | ||
| 305 : | my $self = shift; | ||
| 306 : | $self->imageName(@_); | ||
| 307 : | } | ||
| 308 : | sub pngName { # It is better to use the method imageName. | ||
| 309 : | my $self = shift; | ||
| 310 : | $self->imageName(@_); | ||
| 311 : | } | ||
| 312 : | sub size { | ||
| 313 : | my $self = shift; | ||
| 314 : | $self ->{size}; | ||
| 315 : | } | ||
| 316 : | |||
| 317 : | sub _initialize { | ||
| 318 : | my $self = shift; | ||
| 319 : | $self->{position} = [0,0]; | ||
| 320 : | # $self->{width} = $self->{'size'}[0]; # original height and width tags match pixel dimensions | ||
| 321 : | # $self->{height} = $self->{'size'}[1]; # of the image | ||
| 322 : | # allocate some colors | ||
| 323 : | $self->{'colors'}{'background_color'} = $self->im->colorAllocate(255,255,255); | ||
| 324 : | $self->{'colors'}{'default_color'} = $self->im->colorAllocate(0,0,0); | ||
| 325 : | $self->{'colors'}{'white'} = $self->im->colorAllocate(255,255,255); | ||
| 326 : | $self->{'colors'}{'black'} = $self->im->colorAllocate(0,0,0); | ||
| 327 : | apizer | 1079 | $self->{'colors'}{'red'} = $self->im->colorAllocate(255,0,0); |
| 328 : | sh002i | 1050 | $self->{'colors'}{'green'} = $self->im->colorAllocate(0,255,0); |
| 329 : | $self->{'colors'}{'blue'} = $self->im->colorAllocate(0,0,255); | ||
| 330 : | $self->{'colors'}{'yellow'} = $self->im->colorAllocate(255,255,0); | ||
| 331 : | $self->{'colors'}{'orange'} = $self->im->colorAllocate(255,100,0); | ||
| 332 : | $self->{'colors'}{'gray'} = $self->im->colorAllocate(180,180,180); | ||
| 333 : | $self->{'colors'}{'nearwhite'} = $self->im->colorAllocate(254,254,254); | ||
| 334 : | # obtain a new imageNumber; | ||
| 335 : | $self->{imageNumber} = ++$last_image_number; | ||
| 336 : | } | ||
| 337 : | |||
| 338 : | # reference shapes | ||
| 339 : | # closed circle | ||
| 340 : | # open circle | ||
| 341 : | apizer | 1079 | |
| 342 : | sh002i | 1050 | # The translation subroutines. |
| 343 : | |||
| 344 : | sub ii { | ||
| 345 : | my $self = shift; | ||
| 346 : | my $x = shift; | ||
| 347 : | return undef unless defined($x); | ||
| 348 : | my $xmax = $self-> xmax ; | ||
| 349 : | my $xmin = $self-> xmin ; | ||
| 350 : | int( ($x - $xmin)*(@{$self->size}[0]) / ($xmax - $xmin) ); | ||
| 351 : | } | ||
| 352 : | |||
| 353 : | sub jj { | ||
| 354 : | my $self = shift; | ||
| 355 : | my $y = shift; | ||
| 356 : | return undef unless defined($y); | ||
| 357 : | apizer | 1079 | my $ymax = $self->ymax; |
| 358 : | sh002i | 1050 | my $ymin = $self->ymin; |
| 359 : | #print "ymax=$ymax y=$y ymin=$ymin size=",${$self->size}[1],"<BR><BR><BR><BR>"; | ||
| 360 : | int( ($ymax - $y)*${$self->size}[1]/($ymax-$ymin) ); | ||
| 361 : | } | ||
| 362 : | |||
| 363 : | # The move and draw subroutines. Arguments are in real world coordinates. | ||
| 364 : | |||
| 365 : | sub lineTo { | ||
| 366 : | my $self = shift; | ||
| 367 : | glarose | 6039 | my ($x,$y,$color, $w, $d) = @_; |
| 368 : | glarose | 6038 | $w = 1 if ! defined( $w ); |
| 369 : | glarose | 6039 | $d = 0 if ! defined( $d ); ## draw a dashed line? |
| 370 : | glarose | 6038 | |
| 371 : | sh002i | 1050 | $x=$self->ii($x); |
| 372 : | $y=$self->jj($y); | ||
| 373 : | $color = $self->{'colors'}{$color} if $color=~/[A-Za-z]+/ && defined($self->{'colors'}{$color}) ; # colors referenced by name works here. | ||
| 374 : | $color = $self->{'colors'}{'default_color'} unless defined($color); | ||
| 375 : | glarose | 6038 | |
| 376 : | $self->im->setThickness( $w ); | ||
| 377 : | glarose | 6039 | if ( $d ) { |
| 378 : | glarose | 6046 | my @dashing = ( $color )x(4*$w*$w); |
| 379 : | my @spacing = ( GD::gdTransparent )x(3*$w*$w); | ||
| 380 : | glarose | 6039 | $self->im->setStyle( @dashing, @spacing ); |
| 381 : | $self->im->line(@{$self->position},$x,$y,GD::gdStyled); | ||
| 382 : | } else { | ||
| 383 : | $self->im->line(@{$self->position},$x,$y,$color); | ||
| 384 : | } | ||
| 385 : | glarose | 6038 | $self->im->setThickness( 1 ); |
| 386 : | sh002i | 1050 | #warn "color is $color"; |
| 387 : | @{$self->position} = ($x,$y); | ||
| 388 : | } | ||
| 389 : | |||
| 390 : | sub moveTo { | ||
| 391 : | my $self = shift; | ||
| 392 : | my $x=shift; | ||
| 393 : | my $y=shift; | ||
| 394 : | $x=$self->ii($x); | ||
| 395 : | $y=$self->jj($y); | ||
| 396 : | #print "moving to $x,$y<BR>"; | ||
| 397 : | @{$self->position} = ( $x,$y ); | ||
| 398 : | } | ||
| 399 : | |||
| 400 : | glarose | 6038 | sub arrowTo { |
| 401 : | my $self = shift; | ||
| 402 : | glarose | 6039 | my ( $x1, $y1, $color, $w, $d ) = @_; |
| 403 : | glarose | 6038 | $w = 1 if ! defined( $w ); |
| 404 : | glarose | 6039 | $d = 0 if ! defined( $d ); |
| 405 : | glarose | 6038 | my $width = ( $w == 1 ) ? 2 : $w; |
| 406 : | |||
| 407 : | $x1 = $self->ii($x1); | ||
| 408 : | $y1 = $self->jj($y1); | ||
| 409 : | $color = $self->{'colors'}{$color} if $color=~/[A-Za-z]+/ && defined($self->{'colors'}{$color}) ; | ||
| 410 : | $color = $self->{'colors'}{'default_color'} unless defined($color); | ||
| 411 : | |||
| 412 : | ## set thickness | ||
| 413 : | $self->im->setThickness($w); | ||
| 414 : | |||
| 415 : | my ($x0, $y0) = @{$self->position}; | ||
| 416 : | my $dx = $x1 - $x0; | ||
| 417 : | my $dy = $y1 - $y0; | ||
| 418 : | my $len = sqrt($dx*$dx + $dy*$dy); | ||
| 419 : | my $ux = $dx/$len; ## a unit vector in the direction of the arrow | ||
| 420 : | my $uy = $dy/$len; | ||
| 421 : | my $px = -1*$uy; ## a unit vector perpendicular | ||
| 422 : | my $py = $ux; | ||
| 423 : | my $hbx = $x1 - 5*$width*$ux; ## the base of the arrowhead | ||
| 424 : | my $hby = $y1 - 5*$width*$uy; | ||
| 425 : | my $head = new GD::Polygon; | ||
| 426 : | $head->addPt($x1,$y1); | ||
| 427 : | $head->addPt($hbx + 2*$width*$px, $hby + 2*$width*$py); | ||
| 428 : | $head->addPt($hbx - 2*$width*$px, $hby - 2*$width*$py); | ||
| 429 : | $self->im->filledPolygon( $head, $color ); | ||
| 430 : | glarose | 6039 | if ( $d ) { |
| 431 : | glarose | 6046 | my @dashing = ( $color )x(4*$w*$w); |
| 432 : | my @spacing = ( GD::gdTransparent )x(3*$w*$w); | ||
| 433 : | glarose | 6039 | $self->im->setStyle( @dashing, @spacing ); |
| 434 : | $self->im->line( $x0,$y0,$x1,$y1,GD::gdStyled); | ||
| 435 : | } else { | ||
| 436 : | $self->im->line( $x0,$y0,$x1,$y1,$color ); | ||
| 437 : | } | ||
| 438 : | glarose | 6038 | |
| 439 : | @{$self->position} = ( $x1, $y1 ); | ||
| 440 : | |||
| 441 : | ## reset thickness | ||
| 442 : | $self->im->setThickness(1); | ||
| 443 : | } | ||
| 444 : | |||
| 445 : | |||
| 446 : | sh002i | 1050 | sub v_axis { |
| 447 : | my $self = shift; | ||
| 448 : | @{$self->{vaxis}}=@_; # y_value, color | ||
| 449 : | } | ||
| 450 : | sub h_axis { | ||
| 451 : | my $self = shift; | ||
| 452 : | @{$self->{haxis}}=@_; # x_value, color | ||
| 453 : | } | ||
| 454 : | sub h_ticks { | ||
| 455 : | my $self = shift; | ||
| 456 : | my $nudge =2; | ||
| 457 : | push(@{$self->{hticks}},$nudge,@_); # y-value, color, tick x-values. see save_image subroutine | ||
| 458 : | |||
| 459 : | } | ||
| 460 : | sub v_ticks { | ||
| 461 : | my $self = shift; | ||
| 462 : | my $nudge =2; | ||
| 463 : | push(@{$self->{vticks}},$nudge,@_); # x-value, color, tick y-values. see save_image subroutine | ||
| 464 : | |||
| 465 : | } | ||
| 466 : | sub h_grid { | ||
| 467 : | my $self = shift; | ||
| 468 : | push(@{$self->{hgrid}}, @_ ); #color, grid y values | ||
| 469 : | } | ||
| 470 : | sub v_grid { | ||
| 471 : | my $self = shift; | ||
| 472 : | push(@{$self->{vgrid}},@_ ); #color, grid x values | ||
| 473 : | } | ||
| 474 : | |||
| 475 : | |||
| 476 : | apizer | 1079 | |
| 477 : | sh002i | 1050 | sub draw { |
| 478 : | my $self = shift; | ||
| 479 : | my $im =$self->{'im'}; | ||
| 480 : | my @size = @{$self->size}; | ||
| 481 : | my %colors =%{$self->colors}; | ||
| 482 : | apizer | 1079 | |
| 483 : | sh002i | 1050 | # make the background transparent and interlaced |
| 484 : | # $im->transparent($colors{'white'}); | ||
| 485 : | $im->interlaced('true'); | ||
| 486 : | apizer | 1079 | |
| 487 : | sh002i | 1050 | # Put a black frame around the picture |
| 488 : | $im->rectangle(0,0,$size[0]-1,$size[1]-1,$colors{'black'}); | ||
| 489 : | apizer | 1079 | |
| 490 : | sh002i | 1050 | # draw functions |
| 491 : | apizer | 1079 | |
| 492 : | sh002i | 1050 | foreach my $f ($self->fn) { |
| 493 : | #$self->draw_function($f); | ||
| 494 : | $f->draw($self); # the graph is passed to the function so that the label can call back as needed. | ||
| 495 : | } | ||
| 496 : | # and fill the regions | ||
| 497 : | foreach my $r ($self->fillRegion) { | ||
| 498 : | my ($x,$y,$color_name) = @{$r}; | ||
| 499 : | my $color = ${$self->colors}{$color_name}; | ||
| 500 : | $self->im->fill($self->ii($x),$self->jj($y),$color); | ||
| 501 : | } | ||
| 502 : | apizer | 1079 | |
| 503 : | sh002i | 1050 | #draw hticks |
| 504 : | my $tk; | ||
| 505 : | my @ticks = @{$self->{hticks}}; | ||
| 506 : | if (@ticks) { | ||
| 507 : | my $nudge = shift(@ticks); | ||
| 508 : | my $j = $self->jj(shift(@ticks)); | ||
| 509 : | my $tk_clr= $self->{'colors'}{shift(@ticks)}; | ||
| 510 : | apizer | 1079 | |
| 511 : | sh002i | 1050 | foreach $tk (@ticks) { |
| 512 : | $tk = $self->ii($tk); | ||
| 513 : | # print "tk=$tk\n"; | ||
| 514 : | $self->im->line($tk,$j+int($nudge),$tk,$j-int($nudge),$tk_clr); | ||
| 515 : | } | ||
| 516 : | } | ||
| 517 : | #draw vticks | ||
| 518 : | @ticks = @{$self->{vticks}}; | ||
| 519 : | if (@ticks) { | ||
| 520 : | my $nudge = shift(@ticks); | ||
| 521 : | my $i = $self->ii(shift(@ticks)); | ||
| 522 : | my $tk_clr= $self->{'colors'}{shift(@ticks)}; | ||
| 523 : | apizer | 1079 | |
| 524 : | sh002i | 1050 | foreach $tk (@ticks) { |
| 525 : | $tk = $self->jj($tk); | ||
| 526 : | # print "tk=$tk\n"; | ||
| 527 : | $self->im->line($i+int($nudge),$tk,$i-int($nudge),$tk,$tk_clr); | ||
| 528 : | } | ||
| 529 : | } | ||
| 530 : | #draw vgrid | ||
| 531 : | apizer | 1079 | |
| 532 : | sh002i | 1050 | my @grid = @{$self->{vgrid}}; |
| 533 : | if (@grid) { | ||
| 534 : | my $x_value; | ||
| 535 : | my $grid_clr= $self->{'colors'}{shift(@grid)}; | ||
| 536 : | apizer | 1079 | |
| 537 : | sh002i | 1050 | foreach $x_value (@grid) { |
| 538 : | $x_value = $self->ii($x_value); # scale | ||
| 539 : | #print "grid_line=$grid_line\n"; | ||
| 540 : | $self->im->dashedLine($x_value,0,$x_value,$self->{'size'}[1],$grid_clr); | ||
| 541 : | } | ||
| 542 : | } | ||
| 543 : | #draw hgrid | ||
| 544 : | @grid = @{$self->{hgrid}}; | ||
| 545 : | if (@grid) { | ||
| 546 : | my $grid_clr= $self->{'colors'}{shift(@grid)}; | ||
| 547 : | my $y_value; | ||
| 548 : | foreach $y_value (@grid) { | ||
| 549 : | $y_value = $self->jj($y_value); | ||
| 550 : | #print "y_value=$y_value\n"; | ||
| 551 : | #print "width= $self->{width}\n"; | ||
| 552 : | $self->im->dashedLine(0,$y_value,$self->{'size'}[0],$y_value,$grid_clr); | ||
| 553 : | } | ||
| 554 : | } | ||
| 555 : | # draw axes | ||
| 556 : | if (defined ${$self->{vaxis}}[0]) { | ||
| 557 : | my ($x, $color_name) = @{$self->{vaxis}}; | ||
| 558 : | my $color = ${$self->colors}{$color_name}; | ||
| 559 : | $self->moveTo($x,$self->ymin); | ||
| 560 : | $self->lineTo($x,$self->ymax,$color); | ||
| 561 : | #print "draw vaxis", @{$self->{vaxis}},"\n"; | ||
| 562 : | #$self->im->line(0,0,300,300,$color); | ||
| 563 : | } | ||
| 564 : | if (defined $self->{haxis}[0]) { | ||
| 565 : | my ($y, $color_name) = @{$self->{haxis}}; | ||
| 566 : | my $color = ${$self->colors}{$color_name}; | ||
| 567 : | $self->moveTo($self->xmin,$y); | ||
| 568 : | $self->lineTo($self->xmax,$y,$color); | ||
| 569 : | #print "draw haxis", @{$self->{haxis}},"\n"; | ||
| 570 : | } | ||
| 571 : | # draw functions again | ||
| 572 : | apizer | 1079 | |
| 573 : | sh002i | 1050 | foreach my $f ($self->fn) { |
| 574 : | #$self->draw_function($f); | ||
| 575 : | $f->draw($self); # the graph is passed to the function so that the label can call back as needed. | ||
| 576 : | } | ||
| 577 : | |||
| 578 : | apizer | 1079 | |
| 579 : | sh002i | 1050 | #draw labels |
| 580 : | my $lb; | ||
| 581 : | foreach $lb ($self->lb) { | ||
| 582 : | $lb->draw($self); # the graph is passed to the label so that the label can call back as needed. | ||
| 583 : | } | ||
| 584 : | #draw stamps | ||
| 585 : | my $stamp; | ||
| 586 : | foreach $stamp ($self->stamps) { | ||
| 587 : | $stamp->draw($self); # the graph is passed to the label so that the label can call back as needed. | ||
| 588 : | } | ||
| 589 : | my $out; | ||
| 590 : | if ($WWPlot::use_png) { | ||
| 591 : | $out = $im->png; | ||
| 592 : | } else { | ||
| 593 : | $out = $im->gif; | ||
| 594 : | } | ||
| 595 : | $out; | ||
| 596 : | apizer | 1079 | |
| 597 : | sh002i | 1050 | } |
| 598 : | |||
| 599 : | |||
| 600 : | |||
| 601 : | gage | 6346 | # sub AUTOLOAD { |
| 602 : | # my $self = shift; | ||
| 603 : | # my $type = ref($self) || die "$self is not an object"; | ||
| 604 : | # my $name = $WWPlot::AUTOLOAD; | ||
| 605 : | # $name =~ s/.*://; # strip fully-qualified portion | ||
| 606 : | # unless (exists $self->{'_permitted'}->{$name} ) { | ||
| 607 : | # die "Can't find '$name' field in object of class $type"; | ||
| 608 : | # } | ||
| 609 : | # if (@_) { | ||
| 610 : | # return $self->{$name} = shift; | ||
| 611 : | # } else { | ||
| 612 : | # return $self->{$name}; | ||
| 613 : | # } | ||
| 614 : | # | ||
| 615 : | # } | ||
| 616 : | ########################## | ||
| 617 : | # Access methods | ||
| 618 : | ########################## | ||
| 619 : | sub ymin { | ||
| 620 : | sh002i | 1050 | my $self = shift; |
| 621 : | my $type = ref($self) || die "$self is not an object"; | ||
| 622 : | gage | 6346 | unless (exists $self->{ymin} ) { |
| 623 : | die "Can't find ymin field in object of class $type"; | ||
| 624 : | } | ||
| 625 : | |||
| 626 : | sh002i | 1050 | if (@_) { |
| 627 : | gage | 6346 | return $self->{ymin} = shift; |
| 628 : | sh002i | 1050 | } else { |
| 629 : | gage | 6346 | return $self->{ymin} |
| 630 : | sh002i | 1050 | } |
| 631 : | gage | 6346 | } |
| 632 : | sh002i | 1050 | |
| 633 : | gage | 6346 | sub xmin { |
| 634 : | my $self = shift; | ||
| 635 : | my $type = ref($self) || die "$self is not an object"; | ||
| 636 : | unless (exists $self->{xmin} ) { | ||
| 637 : | die "Can't find xmin field in object of class $type"; | ||
| 638 : | } | ||
| 639 : | |||
| 640 : | if (@_) { | ||
| 641 : | return $self->{xmin} = shift; | ||
| 642 : | } else { | ||
| 643 : | return $self->{xmin} | ||
| 644 : | } | ||
| 645 : | sh002i | 1050 | } |
| 646 : | |||
| 647 : | gage | 6346 | sub xmax { |
| 648 : | my $self = shift; | ||
| 649 : | my $type = ref($self) || die "$self is not an object"; | ||
| 650 : | unless (exists $self->{xmax} ) { | ||
| 651 : | die "Can't find xmax field in object of class $type"; | ||
| 652 : | } | ||
| 653 : | |||
| 654 : | if (@_) { | ||
| 655 : | return $self->{xmax} = shift; | ||
| 656 : | } else { | ||
| 657 : | return $self->{xmax} | ||
| 658 : | } | ||
| 659 : | } | ||
| 660 : | sh002i | 1050 | |
| 661 : | gage | 6346 | sub ymin { |
| 662 : | my $self = shift; | ||
| 663 : | my $type = ref($self) || die "$self is not an object"; | ||
| 664 : | unless (exists $self->{ymin} ) { | ||
| 665 : | die "Can't find ymin field in object of class $type"; | ||
| 666 : | } | ||
| 667 : | |||
| 668 : | if (@_) { | ||
| 669 : | return $self->{ymin} = shift; | ||
| 670 : | } else { | ||
| 671 : | return $self->{ymin} | ||
| 672 : | } | ||
| 673 : | } | ||
| 674 : | |||
| 675 : | sub ymax { | ||
| 676 : | my $self = shift; | ||
| 677 : | my $type = ref($self) || die "$self is not an object"; | ||
| 678 : | unless (exists $self->{ymax} ) { | ||
| 679 : | die "Can't find ymax field in object of class $type"; | ||
| 680 : | } | ||
| 681 : | |||
| 682 : | if (@_) { | ||
| 683 : | return $self->{ymax} = shift; | ||
| 684 : | } else { | ||
| 685 : | return $self->{ymax} | ||
| 686 : | } | ||
| 687 : | } | ||
| 688 : | |||
| 689 : | sub imageName { | ||
| 690 : | my $self = shift; | ||
| 691 : | my $type = ref($self) || die "$self is not an object"; | ||
| 692 : | unless (exists $self->{imageName} ) { | ||
| 693 : | die "Can't find imageName field in object of class $type"; | ||
| 694 : | } | ||
| 695 : | |||
| 696 : | if (@_) { | ||
| 697 : | return $self->{imageName} = shift; | ||
| 698 : | } else { | ||
| 699 : | return $self->{imageName} | ||
| 700 : | } | ||
| 701 : | } | ||
| 702 : | |||
| 703 : | sub position { | ||
| 704 : | my $self = shift; | ||
| 705 : | my $type = ref($self) || die "$self is not an object"; | ||
| 706 : | unless (exists $self->{position} ) { | ||
| 707 : | die "Can't find position field in object of class $type"; | ||
| 708 : | } | ||
| 709 : | |||
| 710 : | if (@_) { | ||
| 711 : | return $self->{position} = shift; | ||
| 712 : | } else { | ||
| 713 : | return $self->{position} | ||
| 714 : | } | ||
| 715 : | } | ||
| 716 : | sh002i | 1050 | sub DESTROY { |
| 717 : | # doing nothing about destruction, hope that isn't dangerous | ||
| 718 : | apizer | 1079 | } |
| 719 : | sh002i | 1050 | |
| 720 : | sub save_image { | ||
| 721 : | my $self = shift; | ||
| 722 : | warn "The method save_image is no longer supported. Use insertGraph(\$graph)"; | ||
| 723 : | apizer | 1079 | "The method save_image is no longer supported. Use insertGraph(\$graph)"; |
| 724 : | sh002i | 1050 | } |
| 725 : | |||
| 726 : | apizer | 1079 | |
| 727 : | sh002i | 1050 | 1; |
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