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https://github.com/FliegendeWurst/cursive.git
synced 2024-11-09 10:50:40 +00:00
Add animated example.
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@ -28,3 +28,7 @@ path = "examples/lorem.rs"
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[[example]]
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name = "dialog"
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path = "examples/dialog.rs"
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[[example]]
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name = "logs"
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path = "examples/logs.rs"
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103
examples/logs.rs
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103
examples/logs.rs
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@ -0,0 +1,103 @@
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extern crate cursive;
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use std::sync::mpsc;
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use std::thread;
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use cursive::Cursive;
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use cursive::printer::Printer;
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use cursive::view::{View,FullView};
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fn main() {
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// As usual, create the Cursive root
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let mut siv = Cursive::new();
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// We want to refresh the page even when no input is given.
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siv.set_fps(10);
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siv.add_global_callback('q' as i32, |s,_| s.quit());
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// A channel will communicate data from our running task to the UI.
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let (tx,rx) = mpsc::channel();
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// Generate data in a separate thread.
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thread::spawn(|| { generate_logs(tx); });
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// And sets the view to read from the other end of the channel.
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siv.add_layer(FullView::new(BufferView::new(200, rx)));
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siv.run();
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}
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// We will only simulate log generation here.
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// In real life, this may come from a running task, a separate process, ...
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fn generate_logs(tx: mpsc::Sender<String>) {
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let mut i = 1;
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loop {
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let line = format!("Interesting log line {}", i);
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i += 1;
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match tx.send(line) {
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Err(_) => panic!("Uh?..."),
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Ok(_) => (),
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}
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thread::sleep_ms(30);
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}
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}
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// Let's define a buffer view, that shows the last lines from a stream.
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struct BufferView {
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// We will emulate a ring buffer
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buffer: Vec<String>,
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// Current position in the buffer
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pos: usize,
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// Receiving end of the stream
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rx: mpsc::Receiver<String>,
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}
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impl BufferView {
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// Creates a new view with the given buffer size
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fn new(size: usize, rx: mpsc::Receiver<String>) -> Self {
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BufferView {
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rx: rx,
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buffer: (0..size).map(|_| String::new()).collect(),
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pos: 0,
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}
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}
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// Reads available data from the stream into the buffer
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fn update(&mut self) {
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let mut i = self.pos;
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while let Ok(line) = self.rx.try_recv() {
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i = (i+1) % self.buffer.len();
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self.buffer[i] = line;
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self.pos = i;
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}
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}
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// Chain together the two parts of the buffer to appear as a circular one.
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// The signature is quite ugly, but basically we return an iterator:
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// a Chain of two slice iterators.
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fn ring<'a>(&'a self) -> std::iter::Chain<std::slice::Iter<'a,String>, std::slice::Iter<'a,String>> {
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// The main buffer is "circular" starting at self.pos
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// So we chain the two parts as one
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self.buffer[self.pos..].iter().chain(self.buffer[..self.pos].iter())
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}
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}
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impl View for BufferView {
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fn draw(&mut self, printer: &Printer, _: bool) {
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// Before drawing, we'll want to update the buffer
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self.update();
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// If the buffer is large enough, we can fill the window
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if self.buffer.len() > printer.size.y as usize {
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// We'll only print the last entries that fit.
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// So discard entries if there are too many.
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let discard = self.buffer.len() - printer.size.y as usize;
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// And we discard the first entries if needed
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for (i, line) in self.ring().skip(discard).enumerate() {
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printer.print((0,i as u32), line);
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}
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} else {
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}
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}
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}
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@ -1,8 +1,7 @@
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extern crate cursive;
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use cursive::Cursive;
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use cursive::view::TextView;
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use cursive::view::Dialog;
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use cursive::view::{TextView,Dialog};
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use std::fs::File;
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use std::io::Read;
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15
src/lib.rs
15
src/lib.rs
@ -37,6 +37,7 @@ pub use margins::Margins;
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use std::any::Any;
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use std::rc::Rc;
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use std::collections::HashMap;
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use std::sync::mpsc;
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use vec::Vec2;
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use view::View;
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@ -93,6 +94,17 @@ impl Cursive {
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res
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}
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/// Regularly redraws everything, even when no input is given.
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///
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/// Call with fps=0 to disable (default value).
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pub fn set_fps(&self, fps: u32) {
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if fps == 0 {
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ncurses::timeout(-1);
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} else {
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ncurses::timeout(1000 / fps as i32);
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}
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}
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/// Returns a mutable reference to the currently active screen.
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pub fn screen_mut(&mut self) -> &mut StackView {
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let id = self.active_screen;
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@ -122,6 +134,7 @@ impl Cursive {
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}
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fn find_any(&mut self, path: &ViewPath) -> Option<&mut Any> {
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// Internal find method that returns a Any object.
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self.screen_mut().find(path)
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}
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@ -190,7 +203,7 @@ impl Cursive {
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// And the big event loop begins!
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while self.running {
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// Do we need to redraw everytime?
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// Probably actually.
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// Probably, actually.
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// TODO: Do we actually need to clear everytime?
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ncurses::clear();
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// TODO: Do we need to re-layout everytime?
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@ -28,7 +28,7 @@ impl Button {
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impl View for Button {
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fn draw(&self, printer: &Printer, focused: bool) {
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fn draw(&mut self, printer: &Printer, focused: bool) {
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let style = if !focused { color::PRIMARY } else { color::HIGHLIGHT };
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let x = printer.size.x - 1;
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@ -74,13 +74,13 @@ impl Dialog {
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}
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impl View for Dialog {
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fn draw(&self, printer: &Printer, focused: bool) {
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fn draw(&mut self, printer: &Printer, focused: bool) {
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// This will be the height used by the buttons.
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let mut height = 0;
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// Current horizontal position of the next button we'll draw.
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let mut x = 0;
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for (i,button) in self.buttons.iter().enumerate().rev() {
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for (i,button) in self.buttons.iter_mut().enumerate().rev() {
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let size = button.size;
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let offset = printer.size - self.borders.bot_right() - self.padding.bot_right() - size - Vec2::new(x, 0);
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// Add some special effect to the focused button
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33
src/view/full_view.rs
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33
src/view/full_view.rs
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@ -0,0 +1,33 @@
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use view::{View,ViewWrapper,SizeRequest,DimensionRequest};
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use vec::Vec2;
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pub struct FullView<T: View> {
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pub view: T,
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}
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impl <T: View> FullView<T> {
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pub fn new(view: T) -> Self {
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FullView {
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view: view,
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}
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}
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}
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impl <T: View> ViewWrapper for FullView<T> {
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wrap_impl!(&self.view);
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fn wrap_get_min_size(&self, req: SizeRequest) -> Vec2 {
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let w = match req.w {
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DimensionRequest::Fixed(w) => w,
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DimensionRequest::AtMost(w) => w,
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DimensionRequest::Unknown => self.view.get_min_size(req).x,
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};
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let h = match req.h {
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DimensionRequest::Fixed(h) => h,
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DimensionRequest::AtMost(h) => h,
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DimensionRequest::Unknown => self.view.get_min_size(req).y,
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};
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Vec2::new(w,h)
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}
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}
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@ -9,6 +9,7 @@ mod view_path;
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mod dialog;
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mod button;
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mod sized_view;
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mod full_view;
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use std::any::Any;
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@ -21,6 +22,7 @@ pub use self::dialog::Dialog;
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pub use self::button::Button;
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pub use self::sized_view::SizedView;
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pub use self::view_wrapper::ViewWrapper;
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pub use self::full_view::FullView;
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use event::EventResult;
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use vec::{Vec2,ToVec2};
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@ -89,7 +91,7 @@ pub trait View {
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fn layout(&mut self, Vec2) { }
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/// Draws the view with the given printer (includes bounds) and focus.
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fn draw(&self, printer: &Printer, focused: bool);
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fn draw(&mut self, printer: &Printer, focused: bool);
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/// Finds the view pointed to by the given path.
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/// Returns None if the path doesn't lead to a view.
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@ -45,9 +45,9 @@ impl StackView {
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impl View for StackView {
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fn draw(&self, printer: &Printer, focused: bool) {
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fn draw(&mut self, printer: &Printer, focused: bool) {
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ncurses::wrefresh(printer.win);
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for v in self.layers.iter() {
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for v in self.layers.iter_mut() {
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// Center the view
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v.view.draw(&Printer::new(v.win.unwrap(), v.size), focused);
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@ -112,7 +112,7 @@ impl <'a> Iterator for LinesIterator<'a> {
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}
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impl View for TextView {
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fn draw(&self, printer: &Printer, _: bool) {
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fn draw(&mut self, printer: &Printer, _: bool) {
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// We don't have a focused view
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let lines = self.content.split("\n")
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@ -11,8 +11,8 @@ pub trait ViewWrapper {
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fn get_view_mut(&mut self) -> &mut View;
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/// Wraps the draw method.
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fn wrap_draw(&self, printer: &Printer, focused: bool) {
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self.get_view().draw(printer, focused);
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fn wrap_draw(&mut self, printer: &Printer, focused: bool) {
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self.get_view_mut().draw(printer, focused);
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}
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/// Wraps the get_min_size method.
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@ -37,7 +37,7 @@ pub trait ViewWrapper {
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}
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impl <T: ViewWrapper> View for T {
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fn draw(&self, printer: &Printer, focused: bool) {
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fn draw(&mut self, printer: &Printer, focused: bool) {
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self.wrap_draw(printer, focused);
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}
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