50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
//! An example for how to send text to the display.
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use clap::Parser;
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use servicepoint::{Command, Connection, Cp437Grid, Grid, Origin};
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#[derive(Parser, Debug)]
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struct Cli {
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#[arg(short, long, default_value = "localhost:2342")]
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destination: String,
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#[arg(short, long, num_args = 1.., value_delimiter = '\n')]
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text: Vec<String>,
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#[arg(short, long, default_value_t = true)]
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clear: bool,
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}
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/// example: `cargo run -- --text "Hallo,
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/// CCCB"`
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fn main() {
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let mut cli = Cli::parse();
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if cli.text.is_empty() {
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cli.text.push("Hello, CCCB!".to_string());
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}
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let connection = Connection::open(&cli.destination)
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.expect("could not connect to display");
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if cli.clear {
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connection
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.send(Command::Clear)
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.expect("sending clear failed");
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}
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let max_width = cli.text.iter().map(|t| t.len()).max().unwrap();
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let mut chars = Cp437Grid::new(max_width, cli.text.len());
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for y in 0..cli.text.len() {
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let row = &cli.text[y];
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for (x, char) in row.chars().enumerate() {
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let char = char.try_into().expect("invalid input char");
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chars.set(x, y, char);
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}
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}
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connection
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.send(Command::Cp437Data(Origin::new(0, 0), chars))
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.expect("sending text failed");
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}
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