perl - What is a mouse-drag in the context of `Win32::Console`?

Question

What would constitute a mouse-drag when using the Input method from Win32::Console?

use Win32::Console qw(STD_INPUT_HANDLE ENABLE_MOUSE_INPUT);

my $con_in = Win32::Console->new(STD_INPUT_HANDLE);
$con_in->Mode(ENABLE_MOUSE_INPUT);

sub getch {
    my ( $arg ) = @_;
    my @event = $con_in->Input();
    my $event_type = shift( @event );
    if ( defined $event_type and $event_type == 2 ) { 
        my( $x, $x, $button_state, $control_key, $event_flags ) = @event; 

        my $button_drag = ?;

        return handle_mouse( $x, $y, $button_state, $button_drag, $arg );
    }
}        

The getch on Linux looks like this:

sub getch {
    my ( $arg ) = @_;
    my $c = ReadKey 0;
    if ( $c eq "\e" ) { 
        my $c = ReadKey 0.10;
        # ...
        if ( $c eq '[' ) {
            my $c = ReadKey 0;
            # ...
            if ( $c eq 'M' ) {   
                # On button press, xterm sends CSI M C b C x C y (6 characters).
                my $event_type = ord( ReadKey 0 ) - 32;
                my $x = ord( ReadKey 0 ) - 32;
                my $y = ord( ReadKey 0 ) - 32;
                my $button_drag = ( $event_type & 0x20 ) >> 5;
                my $button_pressed;
                my $low3bits = $event_type & 0x03;
                if ( $low3bits == 0x03 ) {
                    $button_pressed = 0;
                } else {
                    if ( $event_type & 0x40 ) { 
                        $button_pressed = $low3bits + 4;
                    } else { 
                        $button_pressed = $low3bits + 1;
                    }
                }
                return handle_mouse( $x, $y, $button_pressed, $button_drag, $arg );
            }
            # ...
        }
    }
}

Answer 1

我找到了一些东西，但我不确定它是否正确。

use Win32::Console qw(STD_INPUT_HANDLE ENABLE_MOUSE_INPUT);

my $con_in = Win32::Console->new(STD_INPUT_HANDLE);
$con_in->Mode(ENABLE_MOUSE_INPUT);

sub getch {
    my ( $arg ) = @_;
    my @event = $con_in->Input();
    my $event_type = shift( @event );
    if ( defined $event_type and $event_type == 2 ) { 
        my( $x, $x, $button_state, $control_key, $event_flags ) = @event; 

        my $button_drag = 0;
        # MOUSEEVENTF_MOVE => 0x0001
        $button_drag = 1 if $event_flags & MOUSEEVENTF_MOVE; 
        return handle_mouse( $x, $y, $button_state, $button_drag, $arg );
    }
}