111 lines
3.8 KiB
Rust
111 lines
3.8 KiB
Rust
use ::rltk::{Rltk, VirtualKeyCode};
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use crate::rex_assets::RexAssets;
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use crate::{colors, RunState, State};
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#[derive(PartialEq, Copy, Clone)]
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pub enum MainMenuSelection {
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NewGame,
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LoadGame,
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Quit,
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}
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#[derive(PartialEq, Copy, Clone)]
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pub enum MainMenuResult {
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NoSelection { selected: MainMenuSelection },
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Selected { selected: MainMenuSelection },
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}
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pub fn main_menu(gs: &mut State, ctx: &mut Rltk) -> MainMenuResult {
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let save_exists = crate::saveload_system::does_save_exist();
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let runstate = gs.ecs.fetch::<RunState>();
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let assets = gs.ecs.fetch::<RexAssets>();
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ctx.render_xp_sprite(&assets.menu, 0, 0);
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ctx.draw_box_double(24, 18, 31, 10, colors::WHEAT, colors::BLACK);
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ctx.print_color_centered(20, colors::YELLOW, colors::BLACK, "Rust Roguelike");
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ctx.print_color_centered(21, colors::CYAN, colors::BLACK, "by Timothy J. Warren");
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ctx.print_color_centered(
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22,
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colors::GRAY,
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colors::BLACK,
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"Use Up/Down Arrows and Enter",
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);
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let mut y = 24;
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if let RunState::MainMenu {
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menu_selection: selection,
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} = *runstate
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{
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if selection == MainMenuSelection::NewGame {
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ctx.print_color_centered(y, colors::MAGENTA, colors::BLACK, "Begin New Game");
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} else {
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ctx.print_color_centered(y, colors::WHITE, colors::BLACK, "Begin New Game");
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}
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y += 1;
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if save_exists {
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if selection == MainMenuSelection::LoadGame {
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ctx.print_color_centered(y, colors::MAGENTA, colors::BLACK, "Load Game");
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} else {
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ctx.print_color_centered(y, colors::WHITE, colors::BLACK, "Load Game");
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}
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y += 1;
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}
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if selection == MainMenuSelection::Quit {
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ctx.print_color_centered(y, colors::MAGENTA, colors::BLACK, "Quit");
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} else {
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ctx.print_color_centered(y, colors::WHITE, colors::BLACK, "Quit");
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}
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return match ctx.key {
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None => MainMenuResult::NoSelection {
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selected: selection,
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},
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Some(key) => match key {
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VirtualKeyCode::Escape => MainMenuResult::NoSelection {
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selected: MainMenuSelection::Quit,
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},
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VirtualKeyCode::Up => MainMenuResult::NoSelection {
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selected: match selection {
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MainMenuSelection::NewGame => MainMenuSelection::Quit,
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MainMenuSelection::LoadGame => MainMenuSelection::NewGame,
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MainMenuSelection::Quit => {
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if save_exists {
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MainMenuSelection::LoadGame
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} else {
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MainMenuSelection::NewGame
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}
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}
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},
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},
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VirtualKeyCode::Down => MainMenuResult::NoSelection {
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selected: match selection {
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MainMenuSelection::NewGame => {
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if save_exists {
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MainMenuSelection::LoadGame
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} else {
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MainMenuSelection::Quit
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}
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}
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MainMenuSelection::LoadGame => MainMenuSelection::Quit,
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MainMenuSelection::Quit => MainMenuSelection::NewGame,
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},
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},
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VirtualKeyCode::Return => MainMenuResult::Selected {
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selected: selection,
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},
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_ => MainMenuResult::NoSelection {
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selected: selection,
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},
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},
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};
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}
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MainMenuResult::NoSelection {
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selected: MainMenuSelection::NewGame,
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}
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}
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