cessen/led
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Refactored event loop.

Browse Source 
This allows large numbers of events to be handled in bulk, but without
the program eating up CPU when idle.
This commit is contained in:
Nathan Vegdahl 2014-12-19 21:10:03 -08:00
parent ef64bd8f1c
commit fec361ad29
1 changed files with 74 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

121
src/main.rs
View File

@ -33,6 +33,9 @@ fn main() {
// Get command-line arguments
let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| e.exit());
// Quitting flag
let mut quit = false;
let mut width = rustbox::width();
let mut height = rustbox::height();
@ -40,70 +43,84 @@ fn main() {
rustbox::init();
let enough_time_has_passed: bool = true;
loop {
// Draw the text buffer to screen
if enough_time_has_passed {
rustbox::clear();
{
let mut tb_iter = tb.root_iter();
let mut line: uint = 0;
let mut column: uint = 0;
loop {
if let Option::Some(c) = tb_iter.next() {
if c == '\n' {
line += 1;
column = 0;
continue;
}
rustbox::print(column, line, Style::Normal, Color::White, Color::Black, c.to_string());
column += 1;
// Handle events. We block on the first event, so that the
// program doesn't loop like crazy, but then continue pulling
// events in a non-blocking way until we run out of events
// to handle.
let mut e = rustbox::poll_event(); // Block until we get an event
loop {
match e {
rustbox::Event::KeyEvent(modifier, key, character) => {
// Return
if key == 13 {
let p = tb.len();
tb.insert_text("\n", p);
}
else {
// Esc
else if key == 27 {
quit = true;
break;
}
if line > height {
break;
// Some key
else if let Option::Some(c) = char::from_u32(character) {
let p = tb.len();
tb.insert_text(c.to_string().as_slice(), p);
}
},
if column > width {
tb_iter.next_line();
line += 1;
column = 0;
}
rustbox::Event::ResizeEvent(w, h) => {
width = w as uint;
height = h as uint;
}
}
rustbox::present();
}
// Handle events
match rustbox::poll_event() {
rustbox::Event::KeyEvent(modifier, key, character) => {
// Return
if key == 13 {
let p = tb.len();
tb.insert_text("\n", p);
}
// Esc
else if key == 27 {
_ => {
break;
}
// Some key
else if let Option::Some(c) = char::from_u32(character) {
let p = tb.len();
tb.insert_text(c.to_string().as_slice(), p);
}
},
rustbox::Event::ResizeEvent(w, h) => {
width = w as uint;
height = h as uint;
}
_ => {break;}
e = rustbox::peek_event(0); // Get next event (if any)
}
// Draw the text buffer to screen
rustbox::clear();
{
let mut tb_iter = tb.root_iter();
let mut line: uint = 0;
let mut column: uint = 0;
loop {
if let Option::Some(c) = tb_iter.next() {
if c == '\n' {
line += 1;
column = 0;
continue;
}
rustbox::print(column, line, Style::Normal, Color::White, Color::Black, c.to_string());
column += 1;
}
else {
break;
}
if line > height {
break;
}
if column > width {
tb_iter.next_line();
line += 1;
column = 0;
}
}
}
rustbox::present();
// Quit if quit flag is set
if quit {
break;
}
}