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Fix redraw for disappearing widgets

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This commit is contained in:
Florian Dehau 2016-10-12 11:36:39 +02:00
parent 13f6a5a98b
commit 93f3263e2b
2 changed files with 21 additions and 5 deletions
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22
examples/prototype.rs
View file

@ -26,6 +26,7 @@ struct App {
fetching: bool,
items: Vec<String>,
selected: usize,
show_episodes: bool,
}
enum Event {
@ -56,6 +57,7 @@ fn main() {
fetching: false,
items: ["1", "2", "3"].into_iter().map(|e| String::from(*e)).collect(),
selected: 0,
show_episodes: false,
};
let (tx, rx) = mpsc::channel();
@ -94,6 +96,9 @@ fn main() {
app.selected += 1;
}
}
event::Key::Char('t') => {
app.show_episodes = !app.show_episodes;
}
_ => {}
}
}
@ -113,10 +118,15 @@ fn draw(terminal: &mut Terminal, app: &App) {
.borders(Border::ALL)
.title("Header")
.render(&chunks[0]));
let sizes = if app.show_episodes {
vec![Size::Percent(50), Size::Percent(50)]
} else {
vec![Size::Percent(50), Size::Percent(50)]
};
tree.add(Group::default()
.direction(Direction::Horizontal)
.alignment(Alignment::Left)
.chunks(&[Size::Percent(50), Size::Percent(50)])
.chunks(&sizes)
.render(&chunks[1], |chunks, tree| {
tree.add(List::default()
.block(|b| {
@ -129,10 +139,12 @@ fn draw(terminal: &mut Terminal, app: &App) {
format!("{} {}", prefix, i)
})
.render(&chunks[0]));
tree.add(Block::default()
.borders(Border::ALL)
.title("Episodes")
.render(&chunks[1]));
if app.show_episodes {
tree.add(Block::default()
.borders(Border::ALL)
.title("Episodes")
.render(&chunks[1]));
}
}));
tree.add(Block::default().borders(Border::ALL).title("Footer").render(&chunks[2]));
});

4
src/terminal.rs
View file

@ -39,6 +39,7 @@ impl Terminal {
}
pub fn render(&mut self, ui: Tree) {
info!("Render");
let mut buffers: Vec<Buffer> = Vec::new();
let mut previous: HashMap<(WidgetType, u64), Rect> = HashMap::new();
for node in ui.into_iter() {
@ -55,6 +56,9 @@ impl Terminal {
}
previous.insert((node.widget_type, node.hash), area);
}
for (_, area) in &self.previous {
buffers.insert(0, Buffer::empty(*area));
}
for buf in buffers {
self.render_buffer(&buf);
info!("{:?}", buf.area());