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Re: x5 Dragging/Dropping images with Tk

by stefp (Vicar)
on Jul 06, 2002 at 20:56 UTC ( #179881=note: print w/replies, xml ) Need Help??

in reply to Re: Re: x3 Dragging/Dropping images with Tk
in thread Dragging/Dropping images with Tk

There is no such class as a table. I was just trying to name the surface you want to emulate. :) With the following code, you should have everything to start with. It says when you pick the card, moves it when you drag the mouse, and say when you drop the said card. You should read Tk::bind and Tk::callbacks to fill the details.. Pick a real gif file name as the file parameter!.
use strict; use Tk qw( Ev ); my $m = MainWindow->new(); my $c = $m->Canvas->pack( -expand => 1, fill => 'both'); my ($lastx, $lasty) = (100, 100); my $card = $c->createImage($lastx, $lasty, -image => $m->Photo(-file => '/usr/lib/perl5/site_perl/5.6.1/i386-linux/Tk/X +camel.gif', -format => 'gif'), -anchor => 'center'); $c->bind( $card, "<1>", sub { print STDERR "bark\n"; } ); $c->bind( $card, "<B1-Motion>", [ \&mymovehandler, $card, Ev("x"),Ev(" +y"), ]); # note how the event handler is setup: as a a reference # to an array. Array elements are the handler # and its parameters. See Tk::Bind about the Ev("x") and some such. $c->bind( $card, "<ButtonRelease-1>", sub { print STDERR "dropped\n"; +} ); sub mymovehandler { my ($canvas, $card, $x, $y ) = @_;; $c->move($card, $x -$lastx, $y - $lasty); ($lastx, $lasty) = ($x, $y); } Tk::MainLoop();

-- stefp -- check out TeXmacs wiki

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