marble-machinations/src/util.rs

use raylib::prelude::*;

pub fn text_input(
	d: &mut RaylibDrawHandle,
	bounds: Rectangle,
	text: &mut String,
	is_selected: &mut bool,
) -> bool {
	let mut changed = false;
	let (bg, border) = if *is_selected {
		(Color::DARKCYAN, Color::CYAN)
	} else {
		(Color::GRAY, Color::DIMGRAY)
	};
	d.draw_rectangle_rec(bounds, border);
	d.draw_rectangle_rec(shrink_rec(bounds, 2.), bg);
	d.draw_text(
		text,
		bounds.x as i32 + 4,
		bounds.y as i32 + 4,
		10,
		Color::WHITE,
	);
	let mouse_pos = d.get_mouse_position();
	if d.is_mouse_button_pressed(MouseButton::MOUSE_BUTTON_LEFT)
		&& (bounds.check_collision_point_rec(mouse_pos) || *is_selected)
	{
		*is_selected = !*is_selected;
	}

	if *is_selected {
		if d.is_key_pressed(KeyboardKey::KEY_ESCAPE) {
			*is_selected = false;
		}
		if d.is_key_pressed(KeyboardKey::KEY_BACKSPACE) {
			changed = true;
			text.pop();
		}
		let char_code = unsafe { ffi::GetCharPressed() };
		let c = if char_code > 0 {
			char::from_u32(char_code as u32)
		} else {
			None
		};
		if let Some(c) = c {
			changed = true;
			text.push(c);
		}
	}
	changed
}

pub fn shrink_rec(rec: Rectangle, a: f32) -> Rectangle {
	Rectangle {
		x: rec.x + a,
		y: rec.y + a,
		width: rec.width - a * 2.,
		height: rec.height - a * 2.,
	}
}