Ajout d'une d�mo sur les curves contenant des points

de controle de courbe de bezier cubique.

1 files changed, 191 insertions, 0 deletions

diff --git a/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl b/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl
new file mode 100644
index 0000000..0d57306
--- /dev/null
+++ b/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl
@@ -0,0 +1,191 @@
+#!/usr/bin/perl -w
+# $Id$
+# This simple demo has been developped by C. Mertz <mertz@cena.fr>
+
+####### This file has been inspired from svg examples
+
+use Tk::Zinc;
+
+
+my $mw = MainWindow->new();
+$mw->title('example of curves with cubic control points');
+
+my $text = $mw->Text (-relief => 'sunken', -borderwidth => 2,
+		      -setgrid => 'true',  -height =>2);
+$text->pack(qw/-expand yes -fill both/);
+
+$text->insert('0.0',
+'6 examples of curves containig control points are displayed, 
+ with the list of control points written just below.');
+
+
+my $zinc = $mw->Zinc(-width => 700, -height => 650,
+		     -font => "10x20",
+		     -font => "9x15",
+		     -borderwidth => 0,
+                     -backcolor => "white",
+		     -forecolor => "grey50",
+		      )->pack;
+
+my $group = $zinc->add('group', 1);
+
+$zinc->add('text',$group, -position => [50,20], -anchor => 'w',
+	   -text => "Examples of curve items using cubic bezier control points",
+	   -color => "grey20");
+
+$zinc->add('text',$group, -position => [25,270], -anchor => 'w',
+	   -text => "[ [100, 200], [100, 100, 'c'],\n   [400, 100, 'c'], [400, 200] ]");
+$zinc->add('curve',$group,[100, 200, 100, 100], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[400, 100, 400, 200], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[100, 200], [100, 100, 'c'], [400, 100, 'c'], [400, 200]],
+	   -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[90, 190, 110, 210], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[90, 90, 110, 110], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[390, 90, 410, 110], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[390, 190, 410, 210], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->add('text',$group, -position => [570,270], -anchor => 'w',
+	   -text => "[ [600, 200], [675, 100, 'c'],\n   [975, 100, 'c'], [900, 200] ]");
+$zinc->add('curve',$group,[600, 200, 675, 100], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[975, 100, 900, 200], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[600, 200], [675, 100, 'c'], [975, 100, 'c'], [900, 200]],
+	   -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[590, 190, 610, 210], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[665, 90, 685, 110], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[965, 90, 985, 110], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[890, 190, 910, 210], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->add('text',$group, -position => [25,570], -anchor => 'w',
+	   -text => "[ [100, 500], [25, 400, 'c'],\n   [475, 400, 'c'], [400, 500] ]");
+$zinc->add('curve',$group,[100, 500, 25, 400], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[475, 400, 400, 500], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[100, 500], [25, 400, 'c'], [475, 400, 'c'], [400, 500]],
+	   -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[90, 490, 110, 510], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[15, 390, 35, 410], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[465, 390, 485, 410], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[390, 490, 410, 510], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->add('text',$group, -position => [570,570], -tags => ['text'], -anchor => 'w', -text => "[ [600, 500], [600, 350, 'c'],\n   [900, 650, 'c'], [900, 500] ]");
+$zinc->add('curve',$group,[600, 500, 600, 350], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[900, 650, 900, 500], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[600, 500], [600, 350, 'c'], [900, 650, 'c'], [900, 500]], -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[590, 490, 610, 510], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[590, 340, 610, 360], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[890, 640, 910, 660], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[890, 490, 910, 510], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->add('text',$group, -position => [25,870], -tags => ['text'], -anchor => 'w',
+	   -text => "[ [100, 800], [175, 700, 'c'],\n   [325, 700, 'c'], [400, 800] ]");
+$zinc->add('curve',$group,[100, 800, 175, 700], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[325, 700, 400, 800], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[100, 800], [175, 700, 'c'], [325, 700, 'c'], [400, 800]],
+	   -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[90, 790, 110, 810], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[165, 690, 185, 710], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[315, 690, 335, 710], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[390, 790, 410, 810], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->add('text',$group, -position => [570,980], -tags => ['text'], -anchor => 'w',
+	   -text => "[ [600, 800], [625, 700, 'c'],\n   [725, 700, 'c'], [750, 800],\n   [775, 900, 'c'], [875, 900, 'c'],\n   [900, 800] ]");
+$zinc->add('curve',$group,[600, 800, 625, 700], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[725, 700, 750, 800], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[750, 800, 775, 900], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[875, 900, 900, 800], -tags => ['polyline'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[[600, 800], [625, 700, 'c'], [725, 700, 'c'], [750, 800], [775, 900, 'c'], [875, 900, 'c'], [900, 800]],
+	   -tags => ['curve_bezier'], -filled => 1, -closed => 0, -linecolor => "red", -filled => 0, -linewidth => 5);
+$zinc->add('arc',$group,[590, 790, 610, 810], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[615, 690, 635, 710], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[715, 690, 735, 710], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[740, 790, 760, 810], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('arc',$group,[766, 891, 784, 909], -tags => ['circle'], -filled => 1, -linecolor => "blue", -filled => 0, -linewidth => 4);
+$zinc->add('arc',$group,[865, 890, 885, 910], -tags => ['circle'], -filled => 1, -linewidth => 0, -fillcolor => "#888888", -filled => 1);
+$zinc->add('arc',$group,[890, 790, 910, 810], -tags => ['circle'], -filled => 1, -linecolor => "#888888", -filled => 0, -linewidth => 2);
+
+$zinc->scale($group, 0.6, 0.6);
+
+
+
+### on ajoute quelques binding bien pratiques pour la mise au point
+
+$zinc->Tk::bind('<ButtonPress-1>', [\&press, \&motion]);
+$zinc->Tk::bind('<ButtonRelease-1>', [\&release]);
+$zinc->Tk::bind('<ButtonPress-2>', [\&press, \&zoom]);
+$zinc->Tk::bind('<ButtonRelease-2>', [\&release]);
+
+# $zinc->Tk::bind('<ButtonPress-3>', [\&press, \&mouseRotate]);
+# $zinc->Tk::bind('<ButtonRelease-3>', [\&release]);
+$zinc->bind('all', '<Enter>',
+	[ sub { my ($z)=@_; my $i=$z->find('withtag', 'current');
+			my @tags = $z->gettags($i);
+			pop @tags; # pour enlever 'current'
+			print "$i (", $z->type($i), ") [@tags]
+";}] );
+
+&Tk::MainLoop;
+
+
+##### bindings for moving, rotating, scaling the items
+my ($cur_x, $cur_y, $cur_angle);
+sub press {
+    my ($zinc, $action) = @_;
+    my $ev = $zinc->XEvent();
+    $cur_x = $ev->x;
+    $cur_y = $ev->y;
+    $cur_angle = atan2($cur_y, $cur_x);
+    $zinc->Tk::bind('<Motion>', [$action]);
+}
+
+sub motion {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my @res = $zinc->transform($top_group, [$lx, $ly, $cur_x, $cur_y]);
+    $zinc->translate($top_group, $res[0] - $res[2], $res[1] - $res[3]);
+    $cur_x = $lx;
+    $cur_y = $ly;
+}
+
+sub zoom {
+    my ($zinc, $self) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my $maxx;
+    my $maxy;
+    my $sx;
+    my $sy;
+    
+    if ($lx > $cur_x) {
+	$maxx = $lx;
+    } else {
+	$maxx = $cur_x;
+    }
+    if ($ly > $cur_y) {
+	$maxy = $ly
+    } else {
+	$maxy = $cur_y;
+    }
+    return if ($maxx == 0 || $maxy == 0);
+    $sx = 1.0 + ($lx - $cur_x)/$maxx;
+    $sy = 1.0 + ($ly - $cur_y)/$maxy;
+    $cur_x = $lx;
+    $cur_y = $ly;
+    $zinc->scale($top_group, $sx, $sx); #$sy);
+}
+
+sub mouseRotate {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my $langle = atan2($ly, $lx);
+    $zinc->rotate($top_group, -($langle - $cur_angle));
+    $cur_angle = $langle;
+}
+
+sub release {
+    my ($zinc) = @_;
+    $zinc->Tk::bind('<Motion>', '');
+}