change (or toggle view space) current active handle for Autodesk Maya

change_current_active_handle_axis.mel

proc change_current_active_handle( int $axis ){

    string $cmd = "";
    string $tool = "";
    string $current_ctxt = `currentCtx`;

    switch( $current_ctxt ){

        case "moveSuperContext":
        case "manipMoveContext":
            $cmd = "manipMoveContext";
            $tool = "Move";
            break;

        case "RotateSuperContext":
        case "manipRotateContext":
            $cmd = "manipRotateContext";
            $tool = "Rotate";
            break;

        case "scaleSuperContext":
        case "manipScaleContext":
            $cmd = "manipScaleContext";
            $tool = "Scale";
            break;

    }

    if ( $axis == `eval($cmd + " -q -currentActiveHandle " + $tool)` ){
        $axis = 3;
    }

    eval( $cmd + " -e -currentActiveHandle " + $axis + " " + $tool + ";" );
    dR_updateToolSettings;

}

// change(toggle) x
change_current_active_handle( 0 );

// change(toggle) y
change_current_active_handle( 1 );

// change(toggle) z
change_current_active_handle( 2 );