You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: handler.rs
    path of file: ./repos/flutter-rs/flutter-glfw/src
    
    the code of the file until where you have to start completion: use flutter_engine::tasks::TaskRunnerHandler;
use flutter_engine::FlutterOpenGLHandler;
use flutter_plugins::platform::{AppSwitcherDescription, MimeError, PlatformHandler};
use flutter_plugins::textinput::TextInputHandler;
use flutter_p
    
    pub fn drag_window(&self, x: f64, y: f64) -> bool {
        if self.dragging {
            let mut window = self.window.lock();
            let (wx, wy) = window.get_pos();
            let dx = (x - self.start_cursor_pos.0) as i32;
            let dy = (y - self.start_cursor_pos.1) as i32;
            window.set_pos(wx + dx, wy + dy);
        }
        self.dragging
    }