add readme

Cargo.toml

@@ -4,8 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-egui = { version = "0.29.1", default-features = false }
+egui = { version = "0.29.0", default-features = false }
 qrcode = { version = "0.14.1", default-features = false }
 
 [dev-dependencies]
-eframe = "0.29.1"
+eframe = "0.29.0"

README.md

@@ -0,0 +1,10 @@
+# egui_qr
+
+Simple egui painter that renders QR Codes
+
+## Example
+
+```rust
+QrCodeWidget::from_data(b"https://google.com")?
+    .ui(ui);
+```

examples/main.rs

@@ -6,7 +6,7 @@ fn main() {
     let _ = eframe::run_native(
         "egui_qr",
         NativeOptions::default(),
-        Box::new(|_| Box::new(App::new())),
+        Box::new(|_| Ok(Box::new(App::new()))),
     );
 }
 

src/lib.rs

@@ -40,12 +40,7 @@ impl Widget for QrCodeWidget<'_> {
         let (response, painter) =
             ui.allocate_painter(vec2(w as f32 * scale, w as f32 * scale), Sense::click());
 
-        painter.rect(
+        painter.rect(response.rect, Rounding::ZERO, Color32::WHITE, Stroke::NONE);
-            response.rect,
-            Rounding::ZERO,
-            Color32::WHITE,
-            Stroke::NONE,
-        );
         let mut ctr = 0;
         for c in code_ref.to_colors() {
             let row = ctr / w;