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use super::messagebox; use crate::event::{MenuEvent, OnOffTracking, WaitEvent}; use crate::rendering::{CanvasRenderer, Renderer}; use crate::{ TileProvider, UserEvent, FONT_HEIGHT, FONT_WIDTH, GAME_INTERVAL, OBJECT_POINT, }; use anyhow::{anyhow, Result}; use sdl2::{ event::EventSender, rect::{Point, Rect}, render::WindowCanvas, EventPump, TimerSubsystem, }; use std::collections::BTreeSet; pub struct MenuEntry { pub shortcut: char, pub name: String, } pub struct Menu { header: String, entries: Vec<MenuEntry>, current: usize, width: usize, } impl Menu { pub fn new(header: String) -> Self { Menu { header, entries: Vec::new(), current: 0usize, width: 0usize, } } pub fn append(&mut self, entry: MenuEntry) { self.width = std::cmp::max(self.width, entry.name.len()); self.entries.push(entry); } pub fn get_choice( &mut self, canvas: &mut WindowCanvas, tileprovider: &dyn TileProvider, event_pump: &mut EventPump, event_sender: &EventSender, timer_subsystem: &TimerSubsystem, ) -> Result<char> { let texture_creator = canvas.texture_creator(); let (headercols, headerrows) = messagebox::get_information(&self.header); let textcols = std::cmp::max(headercols, self.width); let contents = format!( "{}\n{}\n {}", &self.header, " ".repeat(textcols + 2), self.entries .iter() .map(|entry| entry.name.to_string()) .collect::<Vec<_>>() .join("\n "), ); let messagebox = messagebox::messagebox( &contents, tileprovider, &texture_creator, )?; let surface = canvas .window() .surface(event_pump) .map_err(|s| anyhow!(s))?; let destrect = Rect::from_center( Point::new( surface.width() as i32 / 2, surface.height() as i32 / 2, ), messagebox.width(), messagebox.height(), ); let timer = timer_subsystem.add_timer( GAME_INTERVAL, Box::new(move || { event_sender.push_custom_event(UserEvent::Timer).unwrap(); GAME_INTERVAL }), ); let mut changed = true; let mut animationframe = 0; let mut next_enabled = BTreeSet::new(); let mut previous_enabled = BTreeSet::new(); loop { if changed { canvas .copy( &messagebox.as_texture(&texture_creator)?, None, destrect, ) .map_err(|s| anyhow!(s))?; let mut renderer = CanvasRenderer { canvas, texture_creator: &texture_creator, tileprovider, }; let point_pos = Point::new( destrect.left() + (FONT_WIDTH as i32 / 2) * 3, destrect.top() + FONT_HEIGHT as i32 * (self.current as i32 + headerrows as i32 + 2), ); renderer.place_tile( OBJECT_POINT + animationframe, point_pos, )?; canvas.present(); changed = false; } let choice: Option<char> = match MenuEvent::wait(event_pump)? { MenuEvent::ChooseCurrentEntry | MenuEvent::ClickMouse => { Some(self.entries[self.current].shortcut) } MenuEvent::Abort => Some('\0'), MenuEvent::NextEntry { context, enabled } => { next_enabled.set_enabled( context, enabled, &mut || { self.current += 1; self.current %= self.entries.len(); }, &mut || {}, ); None } MenuEvent::PreviousEntry { context, enabled } => { previous_enabled.set_enabled( context, enabled, &mut || { if self.current == 0 { self.current = self.entries.len(); } self.current -= 1; }, &mut || {}, ); None } MenuEvent::ChooseShortcutEntry(key) => { let mut choice = None; for entry in self.entries.iter() { if key == entry.shortcut { choice = Some(entry.shortcut); } } choice } MenuEvent::MoveMouse { x, y } => { let x = x - destrect.x() - FONT_WIDTH as i32 * 3; let y = y - destrect.y() - FONT_HEIGHT as i32 * (headerrows as i32 + 2); if x > 0 && x < (FONT_WIDTH * messagebox.width()) as i32 { let menuitem = y / FONT_HEIGHT as i32; if menuitem >= 0 && menuitem < self.entries.len() as i32 { self.current = menuitem as usize; } } None } MenuEvent::RefreshScreen => { canvas.present(); None } MenuEvent::TimerTriggered => { animationframe += 1; animationframe %= 4; changed = true; None } }; if let Some(choice) = choice { drop(timer); return Ok(choice); } } } }