Add example for clear

cursive/examples/clear.rs

@@ -0,0 +1,45 @@
+use cursive::views::TextView;
+use cursive::theme::BaseColor;
+use cursive::theme::Color;
+use cursive::theme::PaletteColor;
+use cursive::view::Resizable;
+use cursive::{Cursive, View};
+use std::process::Command;
+use std::env;
+
+fn open_editor(cursive: &mut Cursive) {
+    let editor = env::var_os("EDITOR").unwrap_or_else(|| "vim".into());
+    let result = Command::new(&editor)
+        .spawn()
+        .expect("Cannot spawn editor")
+        .wait()
+        .unwrap();
+}
+
+fn main() {
+    let mut siv = cursive::default();
+
+    let mut theme = siv.current_theme().clone();;
+    theme.palette[PaletteColor::Background] = Color::TerminalDefault;
+    theme.palette[PaletteColor::View] = Color::TerminalDefault;
+    theme.palette[PaletteColor::Primary] = Color::TerminalDefault;
+    theme.palette[PaletteColor::Highlight] = Color::Light(BaseColor::Cyan);
+    theme.palette[PaletteColor::HighlightText] = Color::Dark(BaseColor::Black);
+    theme.shadow = false;
+    siv.set_theme(theme);
+
+    siv.add_global_callback('q', Cursive::quit);
+    siv.add_global_callback('e', open_editor);
+    siv.add_global_callback('c', Cursive::clear);
+
+    // Add a simple view
+    siv.add_fullscreen_layer(TextView::new(
+        "Hello World!\n\
+         Press q to quit the application.\n\
+         Press c to clear the screen.\n\
+         Press e to spawn the editor.",
+    ).center().full_screen());
+
+    // Run the event loop
+    siv.run();
+}