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//! Advanced input handler
use crate::{graphics::Vector2, viewport::Viewport};
use ggez::{
event::EventHandler,
input::mouse::{self, MouseButton},
Context, GameResult,
};
pub struct InputHandle {
/// The mouse position on the viewport
pub mouse_pos: Vector2,
/// Whether the left mouse button is pressed this frame
pub left_pressed: bool,
/// Whether the middle mouse button is pressed this frame
pub middle_pressed: bool,
/// Whether the right mouse button is pressed this frame
pub right_pressed: bool,
/// Set when pressing left mouse and unset when releasing it
pub drag_point: Option<Vector2>,
/// Get the scroll-wheel position this frame
pub scroll_offset: f32,
}
impl InputHandle {
pub fn new() -> Self {
Self {
mouse_pos: Vector2::new(0.0, 0.0),
left_pressed: false,
middle_pressed: false,
right_pressed: false,
drag_point: None,
scroll_offset: 1.0,
}
}
/// Get the unprojected mouse coordinates
pub fn unproject(&self, vp: &Viewport) -> Vector2 {
// self.mouse_pos.clone() - vp.start().clone()
todo!()
}
}
impl EventHandler for InputHandle {
fn update(&mut self, ctx: &mut Context) -> GameResult<()> {
self.mouse_pos = mouse::position(&ctx).into();
self.left_pressed = mouse::button_pressed(ctx, MouseButton::Left);
self.middle_pressed = mouse::button_pressed(ctx, MouseButton::Middle);
self.right_pressed = mouse::button_pressed(ctx, MouseButton::Right);
// Only set the drag_point once and unset when we release Left button
if self.middle_pressed && self.drag_point.is_none() {
self.drag_point = Some(self.mouse_pos.clone());
} else if !self.middle_pressed {
self.drag_point = None;
}
Ok(())
}
fn mouse_wheel_event(&mut self, _ctx: &mut Context, _: f32, y: f32) {
self.scroll_offset -= y * 0.25;
}
fn draw(&mut self, _: &mut Context) -> GameResult<()> {
panic!("Don't draw the input handle!");
}
}
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