CLEANUP: cleans up dependencies to use workspace version

CLEANUP: standardizes on pretty_env_logger
NEWBIN: Adds gemmarat to use Ratatui as an interface
CLEANUP: removes debugging display from computer.rs
ENHANCEMENT: Constants for locations of test roms built from environment
BUGFIX: SoundTimer was using i32 internally when it needs to be u8
CLEANUP: removes commented code used during diagnostics

gemmarat/src/bin/gemmarat.rs

@@ -0,0 +1,135 @@
+use std::path::Path;
+use std::rc::Rc;
+use ratatui::prelude::*;
+use std::time::Duration;
+use color_eyre::{eyre::Context, Result};
+use ratatui::{
+    crossterm::event::{self, Event, KeyCode},
+    widgets::Paragraph,
+    DefaultTerminal, Frame,
+};
+use ratatui::layout::Rect;
+use ratatui::layout::{Constraint, Direction};
+use ratatui::prelude::Layout;
+use ratatui::widgets::{Block, Borders};
+use gemma::chip8::computer::Chip8Computer;
+use gemma::chip8::computer_manager::Chip8ComputerManager;
+use gemmarat::register_widget::RegisterWidget;
+use gemmarat::timer_widget::TimerWidget;
+use gemmarat::video_widget::VideoWidget;
+
+struct GemmaRat {
+    pub computer: Chip8ComputerManager
+}
+
+impl Default for GemmaRat {
+    fn default() -> Self {
+        GemmaRat {
+            computer: Chip8ComputerManager::default()
+        }
+    }
+}
+
+fn main() -> Result<()> {
+    color_eyre::install()?;
+    let terminal = ratatui::init();
+    let app_result = run(terminal).context("app loop failed");
+    ratatui::restore();
+    app_result
+}
+
+
+fn run(mut terminal: DefaultTerminal) -> Result<()> {
+    let mut manager = Chip8ComputerManager::default();
+    manager.load_new_program_from_disk_to_system_memory(Path::new("/home/tmerritt/Projects/trevors_chip8_toy/resources/roms/2-ibm-logo.ch8"));
+    for _ in 0..30 {
+        manager.tick();
+    }
+    loop {
+        terminal.draw(|frame| {
+            do_draw(frame, &mut manager);
+        }).expect("unable to render display.");
+        if should_quit()? {
+            break;
+        }
+    }
+    Ok(())
+}
+
+fn do_draw(frame: &mut Frame, draw_with: &mut Chip8ComputerManager) {
+    // build the layout...
+    let main_layout = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints(vec![
+            Constraint::Length(32),
+            Constraint::Max(3)
+        ])
+        .split(frame.area());
+    let upper_block = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints(vec![
+            Constraint::Length(64),
+            Constraint::Fill(1)
+        ])
+        .split(main_layout[0]);
+    let column_block = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints(vec![
+            // Registers
+            Constraint::Min(20),
+            // Timers
+            Constraint::Min(6),
+            // Keypad
+            Constraint::Min(8)
+        ])
+        .split(upper_block[1]);
+    // ...then put the parts in the layout.
+
+
+    // Video Block
+    let state = draw_with.state().clone().video_memory;
+    frame.render_widget(
+        VideoWidget::with_display(state), upper_block[0]
+    );
+
+    // Registers Block
+    let mut state = draw_with.state().registers;
+    frame.render_stateful_widget(
+        RegisterWidget::new(),
+            column_block[0],
+        &mut state);
+
+    // Times Block
+    frame.render_stateful_widget(
+        TimerWidget::new(),
+        column_block[1],
+        &mut TimerWidget::with_values(
+            draw_with.state().sound_timer.current(),
+            draw_with.state().delay_timer.current()
+        )
+    );
+
+    // Keypad Block
+    frame.render_widget(
+        Paragraph::new("Keypad Goes Here")
+            .block(Block::new().borders(Borders::ALL)), column_block[2]
+    );
+
+    // Footer Bar
+    frame.render_widget(
+        Paragraph::new("F1 - Step | F2 - Run | F3 - Stop | Q - Quit")
+            .centered()
+            .block(Block::new().borders(Borders::ALL)), main_layout[1]);
+
+}
+
+fn should_quit() -> Result<bool> {
+    if event::poll(Duration::from_millis(250)).context("event poll failed")? {
+        if let Event::Key(key) = event::read().context("event read failed")? {
+            return Ok(KeyCode::Char('q') == key.code);
+        }
+    }
+    Ok(false)
+}
+
+

gemmarat/src/lib.rs

@@ -0,0 +1,3 @@
+pub mod timer_widget;
+pub mod register_widget;
+pub mod video_widget;

gemmarat/src/register_widget.rs

@@ -0,0 +1,43 @@
+use ratatui::layout::Rect;
+use ratatui::prelude::*;
+use ratatui::widgets::{Block, Borders, List, ListItem, ListState};
+use gemma::chip8::registers::Chip8Registers;
+
+pub struct RegisterWidget {
+    state: Chip8Registers
+}
+
+impl RegisterWidget {
+    pub fn new() -> RegisterWidget {
+        RegisterWidget { state: Chip8Registers::default() }
+    }
+
+    pub fn with_values(state: Chip8Registers) -> RegisterWidget {
+        RegisterWidget {
+            state
+        }
+    }
+}
+
+impl StatefulWidget for RegisterWidget {
+    type State = Chip8Registers;
+
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Chip8Registers) {
+        let mut working_lines: Vec<ListItem> = vec![];
+
+        // build the lines for the display...
+        let working_text = state.format_as_string();
+
+        for current_line in working_text.lines() {
+            working_lines.push(ListItem::new(current_line));
+        }
+
+        let my_list = List::new(working_lines)
+            .block(Block::new()
+                .title(Line::raw("Registers").centered())
+                .borders(Borders::ALL));
+        // ...draw it out;
+
+        StatefulWidget::render(my_list, area, buf, &mut ListState::default());
+    }
+}

gemmarat/src/timer_widget.rs

@@ -0,0 +1,39 @@
+use ratatui::prelude::*;
+use ratatui::widgets::{Block, Paragraph};
+use ratatui::text::Line;
+
+pub struct TimerWidget {
+    sound_timer_value: u8,
+    delay_timer_value: u8
+}
+
+impl TimerWidget {
+    pub fn new() -> TimerWidget {
+        TimerWidget { sound_timer_value: 0, delay_timer_value: 0 }
+    }
+
+    pub fn with_values(sound: u8, delay: u8) -> TimerWidget {
+        TimerWidget {
+            sound_timer_value: sound,
+            delay_timer_value: delay
+        }
+    }
+}
+
+impl StatefulWidget for TimerWidget {
+    type State = TimerWidget;
+
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut TimerWidget) {
+        let line_1 = Span::raw(format!("Sound Timer: {} [{:02x}]", state.sound_timer_value, state.sound_timer_value));
+        let line_2 = Span::raw(format!("Delay Timer: {} [{:02x}]", state.delay_timer_value, state.delay_timer_value));
+
+        let text = vec![
+            Line::from(vec![line_1]),
+            Line::from(vec![line_2])
+        ];
+
+        let line = Paragraph::new(text)
+            .block(Block::bordered().title("Timers"));
+        line.render(area, buf);
+    }
+}

gemmarat/src/video_widget.rs

@@ -0,0 +1,31 @@
+use ratatui::prelude::*;
+use ratatui::widgets::Paragraph;
+use gemma::chip8::video::Chip8Video;
+
+pub struct VideoWidget {
+    video: Chip8Video
+}
+
+impl VideoWidget {
+    pub fn new() -> Self {
+        VideoWidget {
+            video : Chip8Video::default()
+        }
+    }
+
+    pub fn with_display(new_display: Chip8Video) -> Self {
+        VideoWidget {
+            video: new_display
+        }
+    }
+}
+
+impl Widget for VideoWidget {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let working_text = self.video.format_as_string();
+
+        //println!("WORKING_TEXT = {}", working_text);
+        let text = Paragraph::new(working_text);
+        Widget::render(text, area, buf);
+    }
+}