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authorAdam Carpenter <53hornet@gmail.com>2019-03-27 15:32:37 -0400
committerAdam Carpenter <53hornet@gmail.com>2019-03-27 15:32:37 -0400
commit67cdcc2e12118becb823e20a40cc2687f2b8425a (patch)
treeed92c3234b89079e6d4cf36f5e80c5ffa79def48 /rust-book/oop/src
parente25482fca375d318a39c3b54db396b0db6e0b263 (diff)
downloadlearning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.tar.xz
learning-rust-67cdcc2e12118becb823e20a40cc2687f2b8425a.zip
Started Rust in Action MEAP.
Diffstat (limited to 'rust-book/oop/src')
-rwxr-xr-xrust-book/oop/src/lib.rs41
-rwxr-xr-xrust-book/oop/src/main.rs56
2 files changed, 97 insertions, 0 deletions
diff --git a/rust-book/oop/src/lib.rs b/rust-book/oop/src/lib.rs
new file mode 100755
index 0000000..91ef2e8
--- /dev/null
+++ b/rust-book/oop/src/lib.rs
@@ -0,0 +1,41 @@
+pub trait Draw {
+ fn draw(&self);
+}
+
+pub struct Screen {
+ pub components: Vec<Box<dyn Draw>>,
+}
+
+impl Screen {
+ pub fn run(&self) {
+ for component in self.components.iter() {
+ component.draw();
+ }
+ }
+}
+
+pub struct Button {
+ pub width: u32,
+ pub height: u32,
+ pub label: String,
+}
+
+impl Draw for Button {
+ fn draw(&self) {
+ dbg!("drew button");
+ }
+}
+
+pub struct SelectBox {
+ pub width: u32,
+ pub height: u32,
+ pub options: Vec<String>,
+}
+
+impl Draw for SelectBox {
+ fn draw(&self) {
+ dbg!("drew select box");
+ }
+}
+
+
diff --git a/rust-book/oop/src/main.rs b/rust-book/oop/src/main.rs
new file mode 100755
index 0000000..e92c07c
--- /dev/null
+++ b/rust-book/oop/src/main.rs
@@ -0,0 +1,56 @@
+use oop::{Screen, Button, SelectBox};
+
+pub struct AveragedCollection {
+ list: Vec<i32>,
+ average: f64,
+}
+
+impl AveragedCollection {
+ pub fn add(&mut self, value: i32) {
+ self.list.push(value);
+ self.update_average();
+ }
+
+ pub fn remove(&mut self) -> Option<i32> {
+ let result = self.list.pop();
+ match result {
+ Some(value) => {
+ self.update_average();
+ Some(value)
+ },
+ None => None,
+ }
+ }
+
+ pub fn average(&self) -> f64 {
+ self.average
+ }
+
+ fn update_average(&mut self) {
+ let total: i32 = self.list.iter().sum();
+ self.average = total as f64 / self.list.len() as f64;
+ }
+}
+
+fn main() {
+ let screen = Screen {
+ components: vec![
+ Box::new(SelectBox {
+ width: 75,
+ height: 10,
+ options: vec![
+ String::from("Yes"),
+ String::from("Maybe"),
+ String::from("No")
+ ],
+ }),
+ Box::new(Button {
+ width: 50,
+ height: 10,
+ label: String::from("OK"),
+ }),
+ ],
+ };
+
+ screen.run();
+}