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-rw-r--r--Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl281
1 files changed, 154 insertions, 127 deletions
diff --git a/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl b/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl
index 0d57306..652f878 100644
--- a/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl
+++ b/Perl/demos/Tk/demos/zinc_lib/curve_bezier.pl
@@ -1,8 +1,8 @@
#!/usr/bin/perl -w
-# $Id$
+# $Id: curve_bezier.pl,v 1.1 2002/12/20 12:28:38
# This simple demo has been developped by C. Mertz <mertz@cena.fr>
-####### This file has been inspired from svg examples
+####### This file has been initially inspired from svg examples
use Tk::Zinc;
@@ -11,12 +11,13 @@ 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);
+ -setgrid => 'true', -height =>3);
$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.');
+'6 examples of curves containing control points are displayed,
+ with the list of control points written just below.
+You can move the handles to modify the bezier curves');
my $zinc = $mw->Zinc(-width => 700, -height => 650,
@@ -24,7 +25,7 @@ my $zinc = $mw->Zinc(-width => 700, -height => 650,
-font => "9x15",
-borderwidth => 0,
-backcolor => "white",
- -forecolor => "grey50",
+ -forecolor => "grey80",
)->pack;
my $group = $zinc->add('group', 1);
@@ -33,107 +34,136 @@ $zinc->add('text',$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);
+## Please note: much of the following items below could be computed
+$zinc->add('text',$group, -position => [25,270], -anchor => 'w', -tags => ['bezier1'], -color => "grey20");
+$zinc->add('curve',$group,[100, 200, 100, 100], -tags => ['line1', 'l1-2'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[400, 100, 400, 200], -tags => ['line1', 'l3-4'], -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);
+ -tags => ['bezier1'], -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[90, 190, 110, 210], -tags => ['handle1',"p1"], -filled => 1, -fillcolor => "#BBBBBB");
+$zinc->add('arc',$group,[90, 90, 110, 110], -tags => ['handle1',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1);
+$zinc->add('arc',$group,[390, 90, 410, 110], -tags => ['handle1',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1);
+$zinc->add('arc',$group,[390, 190, 410, 210], -tags => ['handle1',"p4"], -filled => 1, -fillcolor => "#BBBBBB");
+
+$zinc->add('text',$group, -position => [570,270], -anchor => 'w', -tags => ['bezier2'], -color => "grey20");
+$zinc->add('curve',$group,[600, 200, 675, 100], -tags => ['line2', 'l1-2'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[975, 100, 900, 200], -tags => ['line2', 'l3-4'], -linecolor => "#888888", -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);
+ -tags => ['bezier2'], -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[590, 190, 610, 210], -tags => ['handle2',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+$zinc->add('arc',$group,[665, 90, 685, 110], -tags => ['handle2',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[965, 90, 985, 110], -tags => ['handle2',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[890, 190, 910, 210], -tags => ['handle2',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+
+$zinc->add('text',$group, -position => [25,570], -anchor => 'w', -tags => ['bezier3'], -color => "grey20");
+$zinc->add('curve',$group,[100, 500, 25, 400], -tags => ['line3', 'l1-2'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[475, 400, 400, 500], -tags => ['line3', 'l3-4'], -linecolor => "#888888", -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);
+ -tags => ['bezier3'], -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[90, 490, 110, 510], -tags => ['handle3',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+$zinc->add('arc',$group,[15, 390, 35, 410], -tags => ['handle3',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", );
+$zinc->add('arc',$group,[465, 390, 485, 410], -tags => ['handle3',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", );
+$zinc->add('arc',$group,[390, 490, 410, 510], -tags => ['handle3',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+
+$zinc->add('text',$group, -position => [570,570], -anchor => 'w', -tags => ['bezier4'], -color => "grey20");
+$zinc->add('curve',$group,[600, 500, 600, 350], -tags => ['line4', 'l1-2'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[900, 650, 900, 500], -tags => ['line4', 'l3-4'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[[600, 500], [600, 350, 'c'], [900, 650, 'c'], [900, 500]], -tags => ['bezier4'], -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[590, 490, 610, 510], -tags => ['handle4',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+$zinc->add('arc',$group,[590, 340, 610, 360], -tags => ['handle4',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[890, 640, 910, 660], -tags => ['handle4',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[890, 490, 910, 510], -tags => ['handle4',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+
+$zinc->add('text',$group, -position => [25,870], -anchor => 'w', -tags => ['bezier5'], -color => "grey20");
+$zinc->add('curve',$group,[100, 800, 175, 700], -tags => ['line5', 'l1-2'], -linecolor => "#888888", -filled => 0, -linewidth => 2);
+$zinc->add('curve',$group,[325, 700, 400, 800], -tags => ['line5', 'l3-4'], -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);
+ -tags => ['bezier5'], -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[90, 790, 110, 810], -tags => ['handle5',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+$zinc->add('arc',$group,[165, 690, 185, 710], -tags => ['handle5',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1);
+$zinc->add('arc',$group,[315, 690, 335, 710], -tags => ['handle5',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80", -filled => 1);
+$zinc->add('arc',$group,[390, 790, 410, 810], -tags => ['handle5',"p4"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+
+$zinc->add('text',$group, -position => [570,980], -anchor => 'w', -tags => ['bezier6'], -color => "grey20");
+$zinc->add('curve',$group,[600, 800, 625, 700], -tags => ['line6', 'l1-2'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[725, 700, 750, 800], -tags => ['line6', 'l3-4'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[750, 800, 775, 900], -tags => ['line6', 'l4-5'], -linecolor => "#888888", -linewidth => 2);
+$zinc->add('curve',$group,[875, 900, 900, 800], -tags => ['line6', 'l6-7'], -linecolor => "#888888", -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);
+ -tags => ['bezier6'], -filled => 0, -closed => 0, -linecolor => "red", -linewidth => 5);
+$zinc->add('arc',$group,[590, 790, 610, 810], -tags => ['handle6',"p1"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
+$zinc->add('arc',$group,[615, 690, 635, 710], -tags => ['handle6',"p2"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[715, 690, 735, 710], -tags => ['handle6',"p3"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[740, 790, 760, 810], -tags => ['handle6',"p4"], -filled => 1, -linecolor => "blue",-fillcolor => "blue", -linewidth => 2);
+$zinc->add('arc',$group,[766, 891, 784, 909], -tags => ['handle6',"p5"], -filled => 1, -linecolor => "grey80", -linewidth => 4);
+$zinc->add('arc',$group,[865, 890, 885, 910], -tags => ['handle6',"p6"], -filled => 1, -linewidth => 0, -fillcolor => "grey80");
+$zinc->add('arc',$group,[890, 790, 910, 810], -tags => ['handle6',"p7"], -filled => 1, -linecolor => "grey80", -linewidth => 2);
$zinc->scale($group, 0.6, 0.6);
+## Set the text of the text item with a tag "tag"
+## to a human-readable form of the coords of the
+## corresponding curve with the same tag "tag"
+sub setText {
+ my ($tag) = @_;
+ my $textItem = $zinc->find("withtype", 'text', $tag);
+ my $curveItem = $zinc->find("withtype", 'curve', $tag);
+ my @coords = $zinc->coords($curveItem);
+ my $count = 0;
+ my $text = "[ ";
+ while (@coords) {
+ $refXYc = pop @coords;
+ my $x=$refXYc->[0];
+ my $y=$refXYc->[1];
+ my $t=$refXYc->[2];
+ $t = (defined $t) ? ", '".$t."'" : "" ;
+ $text .= "[$x, $y$t]";
+ if (@coords) { $text .= ", "; }
+ if ($count and @coords) {
+ $text .= "\n ";
+ $count =0;
+ } else {
+ $count++;
+ }
+ }
+ $text .= " ]";
+ $zinc->itemconfigure($textItem, -text => $text);
+}
+foreach my $bezierCount (1..6) {
+ &setText ("bezier".$bezierCount);
+ my $curveItem = $zinc->find("withtype", 'curve', "bezier".$bezierCount);
+ my @coords = $zinc->coords($curveItem);
+# print "$bezierCount : ", scalar @coords, "\n";
+ $zinc->bind("handle$bezierCount", '<ButtonPress-1>', [\&press, \&motion]);
+ $zinc->bind("handle$bezierCount", '<ButtonRelease-1>', [\&release]);
+}
-### 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, $cur_angle);
+##### bindings for moving the handles
+my ($cur_x, $cur_y,$item, $bezierNum, $ptNum);
sub press {
my ($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]);
+ $item = $zinc->find('withtag', 'current');
+ $zinc->bind($item, '<Motion>', [$action]);
+ foreach ( $zinc->gettags($item) ) {
+ ## looking for the tag "handlei"
+ if ( /^handle(\d+)$/ ) {
+ $bezierNum = $1;
+ }
+ ## looking for the tag "pj"
+ if ( /^p(\d+)$/ ) {
+ $ptNum = $1;
+ }
+ }
+ print "bezierNum=$bezierNum ptNum=$ptNum\n";
}
sub motion {
@@ -141,51 +171,48 @@ sub motion {
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] - $res[3]);
+ my ($dx,$dy) = $zinc->transform($group, [$lx-$cur_x, $ly-$cur_y]);
+ &moveHandle($item,$dx,$dy);
+ my ($pt1,$pt2) = $zinc->coords($item);
+# print "coords=",@{$pt1}, " ",@{$pt2},"\n";
$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 {
+sub release {
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;
+ $zinc->bind($item,'<Motion>', '');
+ $item = "";
}
-sub release {
- my ($zinc) = @_;
- $zinc->Tk::bind('<Motion>', '');
+sub moveHandle {
+ my ($item,$dx,$dy) = @_;
+ my ($pt1,$pt2) = $zinc->coords($item);
+ ## modifying the handle coords
+ $zinc->coords($item, [ $pt1->[0]+$dx, $pt1->[1]+$dy, $pt2->[0]+$dx, $pt2->[1]+$dy]);
+ my $prevPtNum = $ptNum-1;
+ # there should only be one such item!
+ my $lineA = $zinc->find("withtag", "line$bezierNum && l$prevPtNum-$ptNum");
+ if (defined $lineA) {
+ my ($x,$y) = $zinc->coords($lineA,0,1); # to get the 2nd point coords
+ $zinc->coords($lineA, 0,1, [ $x+$dx, $y+$dy ]);
+ }
+
+ my $nextPtNum = $ptNum+1;
+ # there should only be one such item:
+ my ($lineB) = $zinc->find("withtag", "line$bezierNum && l$ptNum-$nextPtNum");
+ if (defined $lineB) {
+ my ($x,$y) = $zinc->coords($lineB,0,0); # to get the 1st point coords
+ $zinc->coords($lineB, 0,0, [ $x+$dx, $y+$dy ] );
+ }
+
+ ## correctif d'erreur (zinc 3.2.6e)
+ my @coords = $zinc->coords("bezier$bezierNum", 0);
+ $num = $#coords +1 - $ptNum;
+
+ my ($x,$y,$control) = $zinc->coords("bezier$bezierNum", 0,$num);
+ $zinc->coords("bezier$bezierNum", 0,$num, [ [$x+$dx, $y+$dy, $control] ] );
+ &setText ("bezier$bezierNum");
+
}
+