Tk::DoubleClick (3)
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NAME
Tk::DoubleClick - Correctly handle single-click vs double-click events,VERSION
Version 0.04SYNOPSIS
use Tk::Doubleclick; bind_clicks( $widget, [ \&single_callback, @args ], # Single callback with args \&double_callback, # Double callback without args -delay => 500, -button => 'right', );
DESCRIPTION
Tk::DoubleClick module correctly handle single-click vs double-click events, calling only the appropriate callback for the given event.This module always exports "bind_clicks()".
FUNCTIONS
bind_clicks()
Required parameters:- $widget
- Widget to bind to mousebuttons. Typically a Tk::Button object, but could actually be almost any widget.
- [ \&single_click_callback, @single_click_args ],
- The callback subroutine to invoke when the event is a single-click, along with the arguments to pass. When no arguments are passed, the brackets can be omitted.
- [ \&double_click_callback, @double_click_args ],
- The callback subroutine to invoke when the event is a double-click, along with the arguments to pass. When no arguments are passed, the brackets can be omitted.
Options:
- -delay
- Maximum delay time detween clicks in milliseconds. Default is 300. If the second click of a two proximate mouse clicks occurs within the given delay time, the event is considered a double-click. If not, the two clicks are considered two separate (albeit nearly simultaneous) single-clicks.
- -button
- Mouse button to bind. Options are 1, 2, 3, or the corresponding synonyms 'left', 'middle', or 'right'. The default is 1 ('left').
EXAMPLE
# Libraries use strict; use warnings; use Tk; use Tk::DoubleClick; # User-defined my $a_colors = [ [ '#8800FF', '#88FF88', '#88FFFF' ], [ '#FF0000', '#FF0088', '#FF00FF' ], [ '#FF8800', '#FF8888', '#FF88FF' ], [ '#FFFF00', '#FFFF88', '#FFFFFF' ], ]; # Main program my $nsingle = my $ndouble = 0; my $mw = new MainWindow(-title => "Double-click example"); my $f1 = $mw->Frame->pack(-expand => 1, -fill => 'both'); my @args = qw( -width 12 -height 2 -relief groove -borderwidth 4 ); my @pack = qw( -side left -expand 1 -fill both ); # Display single/double click counts my $lb1 = $f1->Label(-text => "Single Clicks", @args); my $lb2 = $f1->Label(-textvar => \$nsingle, @args); my $lb3 = $f1->Label(-text => "Double Clicks", @args); my $lb4 = $f1->Label(-textvar => \$ndouble, @args); $lb1->pack($lb2, $lb3, $lb4, @pack); # Create button for each color, and bind single/double clicks to it foreach my $a_color (@$a_colors) { my $fr = $mw->Frame->pack(-expand => 1, -fill => 'both'); foreach my $bg (@$a_color) { my $b = $fr->Button(-bg => $bg, -text => $bg, @args); $b->pack(@pack); bind_clicks($b, [\&single, $lb2, $bg], [\&double, $lb4, $bg]); } } # Make 'Escape' quit the program $mw->bind("<Escape>" => sub { exit }); MainLoop; # Callbacks sub single { my ($lbl, $color) = @_; $lbl->configure(-bg => $color); ++$nsingle; } sub double { my ($lbl, $color) = @_; $lbl->configure(-bg => $color); ++$ndouble; }
ACKNOWLEDGEMENTS
Thanks to Mark Freeman for numerous great suggestions and documentation help.AUTHOR
John C. Norton, "<jchnorton at verizon.net>"BUGS
Please report any bugs or feature requests to "bug-tk-doubleclick at rt.cpan.org", or through the web interface at <rt.cpan.org/NoAuth/ReportBug.html?Queue=Tk-DoubleClick>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.SUPPORT
You can find documentation for this module with the perldoc command.
perldoc Tk::DoubleClick
You can also look for information at:
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ACKNOWLEDGEMENTS
Thanks to Mark Freeman for numerous great suggestions and documentation help.COPYRIGHT & LICENSE
Copyright 2009 John C. Norton.This program is free software; you can redistribute it and/or modify it under the terms of either: the
GNU
General Public License as published
by the Free Software Foundation; or the Artistic License.
See dev.perl.org/licenses for more information.