I use wxPerl to create custom interfaces.
Alot of these interfaces have a Number Keypad and I've only just
figured out how to get hold of the actual object I click using a post
from Steve Cookson (Thanks Steve). It's embarrassing to admit but I was
creating one event handler per key ( keyPress1, keyPress2 etc...)
So using:
my $keyLabel = $event->GetEventObject()->GetLabel();
I can get the text on the button I have clicked.
But let's say I want to know the actual control name such as return
"button_1" from the EVT_BUTTON event how do I return that? I can use
GetId to return the default number but how do I return it's programmatic
name?
$self->{grid_sizer_1}->Add($self->{button_1}, 0, 0, 0);
I am not really understanding the event subsystem very well. Of course I
have looked at the documentation but due to my lack of understanding I
still am not grasping the concept. I have little idea of what
$event->Skip means and where in the block it should appear, if at all.
Can anyone enlighten me?
What does the doco it mean when it says you can have "further event
handlers", can you create a chain of event handlers?
# copy and paste from docs
wxEvent::Skip
*void* *Skip*(*bool*/ skip = true/)
This method can be used inside an event handler to control whether
further event handlers bound to this event will be called after the
current one returns. Without Skip() (or equivalently if Skip(false) is
used), the event will not be processed any more. If Skip(true) is
called, the event processing system continues searching for a further
handler function for this event, even though it has been processed
already in the current handler.
In general, it is recommended to skip all non-command events to allow
the default handling to take place. The command events are, however,
normally not skipped as usually a single command such as a button click
or menu item selection must only be processed by one handler.
# my sample application
#!/usr/bin/perl -w --
# generated by wxGlade 0.6.3 on Fri Aug 14 14:57:39 2009
# To get wxPerl visit http://wxPerl.sourceforge.net/
use Wx 0.15 qw[:allclasses];
use strict;
package MyFrame;
use Wx qw[:everything];
use base qw(Wx::Frame);
use strict;
sub new {
my( $self, $parent, $id, $title, $pos, $size, $style, $name ) = @_;
$parent = undef unless defined $parent;
$id = -1 unless defined $id;
$title = "" unless defined $title;
$pos = wxDefaultPosition unless defined $pos;
$size = wxDefaultSize unless defined $size;
$name = "" unless defined $name;
# begin wxGlade: MyFrame::new
$style = wxDEFAULT_FRAME_STYLE
unless defined $style;
$self = $self->SUPER::new( $parent, $id, $title, $pos, $size,
$style, $name );
$self->{button_1} = Wx::Button->new($self, -1, "1");
$self->{button_2} = Wx::Button->new($self, -1, "2");
$self->{button_3} = Wx::Button->new($self, -1, "3");
$self->{button_4} = Wx::Button->new($self, -1, "4");
$self->{button_5} = Wx::Button->new($self, -1, "5");
$self->{button_6} = Wx::Button->new($self, -1, "6");
$self->{button_7} = Wx::Button->new($self, -1, "7");
$self->{button_8} = Wx::Button->new($self, -1, "8");
$self->{button_9} = Wx::Button->new($self, -1, "9");
$self->__set_properties();
$self->__do_layout();
Wx::Event::EVT_BUTTON($self, $self->{button_1}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_2}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_3}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_4}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_5}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_6}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_7}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_8}->GetId, \&keyPress);
Wx::Event::EVT_BUTTON($self, $self->{button_9}->GetId, \&keyPress);
# end wxGlade
return $self;
}
sub __set_properties {
my $self = shift;
# begin wxGlade: MyFrame::__set_properties
$self->SetTitle("A sample keypad program");
# end wxGlade
}
sub __do_layout {
my $self = shift;
# begin wxGlade: MyFrame::__do_layout
$self->{sizer_1} = Wx::BoxSizer->new(wxVERTICAL);
$self->{grid_sizer_1} = Wx::GridSizer->new(3, 3, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_1}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_2}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_3}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_4}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_5}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_6}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_7}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_8}, 0, 0, 0);
$self->{grid_sizer_1}->Add($self->{button_9}, 0, 0, 0);
$self->{sizer_1}->Add($self->{grid_sizer_1}, 1, wxEXPAND, 0);
$self->SetSizer($self->{sizer_1});
$self->{sizer_1}->Fit($self);
$self->Layout();
# end wxGlade
}
sub keyPress {
my ($self, $event) = @_;
# wxGlade: MyFrame::keyPress <event_handler>
warn "Event handler (keyPress) not implemented";
$event->Skip;
my $key = $event->GetEventObject()->GetLabel();
my $keyid = $event->GetEventObject()->GetId();
# end wxGlade
Wx::MessageBox("You pressed: $key\nKey ID: $keyid", "wxPerl Sample");
}
# end of class MyFrame
1;
1;
package main;
unless(caller){
local *Wx::App::OnInit = sub{1};
my $app = Wx::App->new();
Wx::InitAllImageHandlers();
my $frame_1 = MyFrame->new();
$app->SetTopWindow($frame_1);
$frame_1->Show(1);
$app->MainLoop();
}
