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package Image::Button::Rect; |
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# $Id: Rect.pm,v 1.5 2003/03/04 15:58:15 joanmg Exp $ |
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use strict; |
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use vars qw(@ISA $VERSION); |
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$VERSION = "0.53"; |
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use Image::Button; |
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@ISA = qw(Image::Button); |
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use GD 1.20; |
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sub print |
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{ |
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my $self = shift; |
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my %args = (file => $self->{file}, |
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prefix => '', |
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postfix => '', |
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@_,); |
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my $file = $args{file}; die "Need output file\n" unless $file; |
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$file = $self->buildFile(%args); |
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my $text = $self->{text}; |
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my $font = $self->{font}; die "Need font\n" unless $font; |
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my $size = $self->{fontsize}; die "Need font size\n" unless $size; |
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my $btcol = $self->{btcolor}; die "Need button color\n" unless $btcol; |
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my $bgcol = $self->{bgcolor}; die "Need bg color\n" unless $bgcol; |
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my $fgcol = $self->{fgcolor}; die "Need fg color\n" unless $fgcol; |
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my $vmarg = $self->{vmargin}; $vmarg = 4 unless defined $vmarg; |
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my $hmarg = $self->{hmargin}; $hmarg = 4 unless defined $hmarg; |
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$font = $self->getFont($font); |
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# Compute bounds |
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my @bounds = &GD::Image::stringFT('GD::Image', 0, $font, |
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$size, 0, 0, 0, $text); |
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# @bounds[0,1] Lower left corner (x,y) |
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# @bounds[2,3] Lower right corner (x,y) |
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# @bounds[4,5] Upper right corner (x,y) |
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# @bounds[6,7] Upper left corner (x,y) |
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if (!@bounds) { |
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die "Error figuring out bounds for '$text': $@\n"; |
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} |
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# We need the text width to center it later on in case tw has come |
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# defined (this happens when we want several buttons to share the |
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# same width). |
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my $thisTw = $bounds[2] - $bounds[0]; |
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my $thisTh = $bounds[1] - $bounds[7]; |
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my $th = $self->{texth}; |
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my $tw = $self->{textw}; |
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$th = $th ? $th : $thisTh; |
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$tw = $tw ? $tw : $thisTw; |
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# How much it goes down under the reference line |
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my $moveUp = $bounds[1] / 2; |
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if ($th != $thisTh) { |
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$moveUp += ($th - $thisTh)/2; |
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} |
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# Figure out sizes and build image |
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my $w = $tw + 2 * $hmarg + 4; # shadows are 2 pixels wide |
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my $h = $th + 2 * $vmarg + 5; # shadows are 2 and 3 pixels tall |
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my $img = new GD::Image($w, $h); |
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# Build and allocate colors |
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my @dk = map { int($_/1.75) } @$btcol; # dark (shadows) |
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my @lt = map { int($_ * 1.2) } @dk; # light shadow |
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my @vlt = map { int($_ * 1.5) } @dk; # very light shadow |
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my $abt = $img->colorAllocate(@$btcol); |
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my $abg = $img->colorAllocate(@$bgcol); |
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my $afg = $img->colorAllocate(@$fgcol); |
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my $adk = $img->colorAllocate(@dk); |
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my $alt = $img->colorAllocate(@lt); |
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my $avlt = $img->colorAllocate(@vlt); |
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my $awhite = $img->colorAllocate(255, 255, 255); |
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$img->fill(0, 0, $abg); |
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# Dark border |
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$img->line(1, 0, $w-3, 0, $adk); # top |
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$img->line(0, 1, 0, $h-2, $adk); # left |
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$img->line(2, $h-2, $w-2, $h-2, $adk); # bottom |
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$img->line($w-2, $h-2, $w-2, 1, $adk); # right |
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# Light shadow |
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$img->line(1, $h-1, $w-2, $h-1, $alt); # bottom |
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# Very light shadow |
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$img->line(3, $h-3, $w-4, $h-3, $avlt); # bottom |
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$img->line($w-1, 2, $w-1, $h-2, $avlt); # right |
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# Fill up the button |
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$img->fill(int($w/2), int($h/2), $abt); |
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# White shadow |
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$img->line(1, 1, 1, $h-2, $awhite); # left |
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$img->line(1, 1, $w-3, 1, $awhite); # left |
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$img->stringFT($afg, $font, $size, 0, |
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$w/2 - $thisTw/2, $h-3-$vmarg-$moveUp, $text) || |
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die "Rendering of '$text' did not work: $@\n"; |
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open FOUT, ">$file" || die "Could not open $file for writing\n"; |
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binmode FOUT; |
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print FOUT $img->png; |
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close FOUT; |
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} |
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# Overrides Button::getSize. |
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sub getSize |
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{ |
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my $self = shift; |
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my ($w, $h) = $self->SUPER::getSize; |
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return ($w+4, $h+5); # Increase with the shadow size |
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} |
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# Overrides Button::textSize |
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sub textSize |
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{ |
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my $self = shift; |
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my %args = (texth => undef, |
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textw => undef, |
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@_,); |
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$self->{texth} = $args{texth}; $self->{texth} -= 4 if $self->{texth}; |
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$self->{textw} = $args{textw}; $self->{textw} -= 5 if $self->{textw}; |
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} |
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1; |
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=head1 NAME |
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Image::Button::Rect - Builds rectangular PNG buttons |
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=head1 SYNOPSIS |
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use Image::Button::Rect; |
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my $b1 = new Image::Button::Rect(text => 'text b1', |
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font => 'newsgotn.ttf', |
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fontsize => 20, |
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file => 'b1.png'); |
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$b1->print; |
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=head1 DESCRIPTION |
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Builds reasonably good looking rectangular buttons, with shadows and |
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all, using GD with TrueType support. See F for more |
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details about things you can do with Buttons. |
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160
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=head2 Constructor |
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my $b = new Image::Button::Rect(text => 'text', |
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font => 'newsgotn.ttf', |
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fontsize => 20, |
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file => 'file.png'); |
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The arguments are |
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=over 4 |
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=item text => 'button text' |
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Defaults to ''. |
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=item font => 'something.ttf' |
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The TrueType font with which to print. It should be located either |
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in the current directory or in the directory pointed at by the |
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environment variable I. Mandatory. |
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=item fontsize => 12 |
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Font size. Defaults to 12 points. |
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=item file => 'button.png' |
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File where the button will be saved. Can be overridden in the print |
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function. Mandatory if you plan to use F to |
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output several related buttons at a time. Defaults to the button |
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text, replacing spaces by '-'. Use '>-' if you want to send the image |
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to standard output. |
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=item btcolor => [ 238, 238, 204 ] |
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Button color in RGB (so [255,255,255] is white and [0,0,0] is black). |
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Defaults to [238,238,204], which is as nice a color as any other. |
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=item fgcolor => [ 0, 0, 0 ] |
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Foreground (text) color in RGB. Defaults to [0,0,0]. |
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=item bgcolor => [ 255, 255, 255 ] |
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Background color in RGB. This is the color you want to be equal to |
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your page background. Defaults to [255,255,255]. You might want to |
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set this transparent, but (1) it's not implemented---in Button.pm, GD |
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knows how to do it--- and (2) IE, or at least some versions of it, |
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doesn't handle transparent PNGs correctly. |
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=item vmargin => 4 |
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Vertical margin under and over the text, more or less. Defaults to 4 |
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pixels. |
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215
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=item hmargin => 4 |
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Horizontal margin left and right of the text, more or less. Defaults |
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to 4 pixels. |
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220
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=back |
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222
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=head1 SEE ALSO |
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F for a description of how to make buttons, and other |
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functions you can use with Image::Button::Rect. |
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F for building sets of related buttons. |
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=head1 AUTHOR |
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Juan M. García-Reyero Ejoanmg@twostones.orgE |
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=head1 COPYRIGHT |
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Copyright (C) 2003 Juan M. García-Reyero. All Rights Reserved. |
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This module is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. |
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