Add scroll-view example (and fix small issues) (#28)

examples/scroll_view.rs

@@ -0,0 +1,65 @@
+use std::sync::Arc;
+
+use anyhow::Result;
+use ratatui::style::Color;
+use trui::*;
+
+fn main() -> Result<()> {
+    let entry = |num| {
+        weighted_h_stack((
+            format!("{num}").weight(0.05),
+            "Avatar"
+                .border(BorderKind::Straight)
+                .fill_max_height(1.0) // TODO not working
+                .weight(0.3),
+            v_stack((
+                "Description"
+                    .fg(Color::Red)
+                    .margin((2, Position::LEFT))
+                    .margin((1, Position::VERTICAL)),
+                "Lorem ipsum dolor sit amet,\n\
+                 consectetur adipiscing elit,\n\
+                 sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.\n\
+                 Ut enim ad minim veniam,\n\
+                 quis nostrud exercitation ullamco laboris nisi ut aliquip \
+                 ex ea commodo consequat.\n\
+                 Duis aute irure dolor in reprehenderit in voluptate velit esse \
+                 cillum dolore eu fugiat nulla pariatur.\n\
+                 Excepteur sint occaecat cupidatat non proident,\n\
+                 sunt in culpa qui officia deserunt mollit anim id est laborum."
+                    .fg(Color::Blue),
+            )),
+        ))
+        .border(BorderKind::Rounded)
+        // .margin(1)
+    };
+
+    fn list_with_every_nth_red_otherwise_blue<T, A>(
+        n: usize,
+        views: impl Iterator<Item = impl View<T, A>>,
+    ) -> Vec<impl View<T, A>> {
+        views
+            .enumerate()
+            .map(|(i, v)| {
+                if i % n == 0 {
+                    OneOf2::A(
+                        v.border(Borders::VERTICAL)
+                            .fg(Color::Red)
+                            .on_hover_bg(Color::Magenta),
+                    )
+                } else {
+                    OneOf2::B(
+                        v.border(Borders::VERTICAL)
+                            .fg(Color::Blue)
+                            .on_hover_bg(Color::Yellow),
+                    )
+                }
+            })
+            .collect()
+    }
+    let list = list_with_every_nth_red_otherwise_blue(2, (0..10).map(entry));
+    let scroll_view = Arc::new(scroll_view(v_stack(list)));
+
+    // let scroll_view = Arc::new(scroll_view());
+    App::new((), move |()| scroll_view.clone()).run()
+}

src/view/weighted_linear_layout.rs

@@ -7,6 +7,7 @@ use crate::{
 use std::{any::Any, marker::PhantomData};
 use xilem_core::{Id, MessageResult, VecSplice};
 
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub struct WeightedLinearLayout<T, A, VT> {
     children: VT,
     axis: Axis,

src/widget/scroll_view.rs

@@ -37,7 +37,7 @@ impl Widget for ScrollView {
         // TODO: scroll wheel + click-drag on scroll bars
         let child_event = if let Event::Mouse(mouse_event) = event {
             let mut mouse_event = *mouse_event;
-            mouse_event.column += self.offset.round() as i16;
+            mouse_event.row += self.offset.round() as i16;
             Event::Mouse(mouse_event)
         } else {
             event.clone()