Function fltk::app::event_length
source · pub fn event_length() -> i32Expand description
Returns the duration of an event
Examples found in repository?
examples/terminal.rs (line 372)
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fn main() {
let app = fltk::app::App::default();
// Set panic handler for main thread (will become UI thread)
std::panic::set_hook(Box::new({
|e| {
eprintln!("!!!!PANIC!!!!{:#?}", e);
error_box(e.to_string()); // Only works from the UI thread
std::process::exit(2);
}
}));
let mut main_win = Window::new(
2285,
180,
WIN_WIDTH,
WIN_HEIGHT,
"FLTK/Terminal Rust wrapper test",
);
main_win.set_type(WindowType::Double);
main_win.make_resizable(true);
let mut menu_bar = MenuBar::new(0, 0, WIN_WIDTH, 30, None);
let mut term = Terminal::new(0, 30, WIN_WIDTH, WIN_HEIGHT - 30, None);
term.set_label("term");
main_win.resizable(&term);
term.set_label_type(LabelType::None);
let idx = menu_bar.add_choice("Test&1");
menu_bar.at(idx).unwrap().set_callback({
let mut term1 = term.clone();
move |c| mb_test1_cb(c, &mut term1)
});
menu_bar
.at(idx)
.unwrap()
.set_shortcut(unsafe { std::mem::transmute(0x80031) }); // Alt-1
let idx = menu_bar.add_choice("Test&2");
menu_bar.at(idx).unwrap().set_callback({
let mut term1 = term.clone();
move |c| mb_test2_cb(c, &mut term1)
});
menu_bar
.at(idx)
.unwrap()
.set_shortcut(unsafe { std::mem::transmute(0x80032) }); // Alt-2
let idx = menu_bar.add_choice("Test&3");
menu_bar.at(idx).unwrap().set_callback({
let mut term1 = term.clone();
move |c| mb_test3_cb(c, &mut term1)
});
menu_bar
.at(idx)
.unwrap()
.set_shortcut(unsafe { std::mem::transmute(0x80033) }); // Alt-3
let idx = menu_bar.add_choice("Test&4");
menu_bar.at(idx).unwrap().set_callback({
let mut term1 = term.clone();
move |c| mb_test4_cb(c, &mut term1)
});
menu_bar
.at(idx)
.unwrap()
.set_shortcut(unsafe { std::mem::transmute(0x80034) }); // Alt-4
let idx = menu_bar.add_choice("Test&5");
menu_bar.at(idx).unwrap().set_callback({
let mut term1 = term.clone();
move |c| mb_test5_cb(c, &mut term1)
});
menu_bar
.at(idx)
.unwrap()
.set_shortcut(unsafe { std::mem::transmute(0x80035) }); // Alt-5
menu_bar.end();
main_win.end();
main_win.show();
// Worker thread that drives the startup tests
let _worker_thread: std::thread::JoinHandle<_> = std::thread::spawn({
let mut term = term.clone();
move || {
println!("Startup tests\n");
term.append("Startup tests\n\n");
term.append("<tmp>\n"); // This line will be overwritten later
term.cursor_up(2, false);
assert_eq!(term.text(false), "Startup tests\n\n"); // Ignores lines below cursor
assert_eq!(term.text(true), "Startup tests\n\n<tmp>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
// Testing ansi() and set_ansi() methods
assert!(term.ansi(), "Default ANSI mode should be ON at startup");
term.append("ANSI mode is \x1b[4mON\x1b[0m\n");
term.set_ansi(false);
assert!(!term.ansi());
term.append("ANSI mode is \x1b[4mOFF\x1b[0m\n");
// append() method is already being used/tested. Test the u8, ascii, and utf8 variants
term.append_u8(b"Appending u8 array\n");
term.append_ascii("Appending ASCII array ↑ (up-arrow is dropped)\n");
term.set_ansi(true); // Restore ANSI state
// Play with the horizontal scrollbar
assert_eq!(term.hscrollbar_style(), ScrollbarStyle::AUTO);
term.set_hscrollbar_style(ScrollbarStyle::ON);
assert_eq!(term.hscrollbar_style(), ScrollbarStyle::ON);
// Test show_unknown() as incidental part of testing append methods
term.set_show_unknown(true);
assert!(term.show_unknown());
term.append_ascii(
"Appending ASCII array with show_unknown() ↑ (up-arrow is three unknown bytes)\n",
);
term.set_show_unknown(false);
assert!(!term.show_unknown());
term.append_utf8("Appending UTF8 array ↑ (up-arrow is visible)\n");
term.append_utf8_u8(b"Appending UTF8 array as u8 \xe2\x86\x91 (up-arrow is visible)\n");
let r = term.cursor_row();
assert_eq!(term.cursor_col(), 0);
term.append(&format!("Testing cursor row/col {r}"));
assert_eq!(term.cursor_col(), 24);
assert_eq!(term.cursor_row(), r);
// Test cursor color methods
assert_eq!(
term.cursor_bg_color(),
Color::XtermGreen,
"Default cursor bg at startup"
);
assert_eq!(
term.cursor_fg_color(),
Color::from_hex(0xff_ff_f0),
"Default cursor fg at startup"
);
term.set_cursor_bg_color(Color::Red);
assert_eq!(term.cursor_bg_color(), Color::Red);
assert_eq!(term.cursor_fg_color(), Color::from_hex(0xff_ff_f0));
term.set_cursor_fg_color(Color::Blue);
assert_eq!(term.cursor_bg_color(), Color::Red);
assert_eq!(term.cursor_fg_color(), Color::Blue);
term.set_cursor_bg_color(Color::XtermGreen); // Restore the defaults
term.set_cursor_fg_color(Color::from_hex(0xff_ff_f0));
assert_eq!(term.cursor_bg_color(), Color::XtermGreen);
assert_eq!(term.cursor_fg_color(), Color::from_hex(0xff_ff_f0));
// The default display_rows() will derive from the window size
let dr = term.display_rows();
let height = term.height();
assert_eq!(height, term.h());
assert!(dr > 20, "Default display_rows at startup");
term.resize(term.x(), term.y(), term.w(), height*2);
assert_eq!(term.h(), height*2);
assert_eq!(height*2, term.h());
assert! (term.display_rows() > dr);
term.resize(term.x(), term.y(), term.w(), height);
// The default display_columns() will derive from the window size
let dc = term.display_columns();
assert!(dc > 80, "Default display_rows at startup");
term.set_display_columns(200);
assert_eq!(term.display_columns(), 200);
term.append("\n 1 2 3 4 5 6 7 8 9");
term.append("\n123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890");
term.append("[This text should be truncated by display_columns() call below.]\n"); // We shouldn't see this on screen
term.set_display_columns(90);
assert_eq!(term.display_columns(), 90);
term.set_display_columns(dc); // Set back to default
assert_eq!(term.display_columns(), dc);
assert_eq!(term.history_rows(), 100, "Default history_rows at startup");
term.set_history_rows(50);
assert_eq!(term.history_rows(), 50);
term.set_history_rows(100); // Set back to default
assert_eq!(term.history_rows(), 100);
let hu = term.history_use();
term.append(&format!(
"history_use = {hu} (it's not clear what this means)\n"
));
// assert_eq!(term.history_use(), hu+1);
term.append(&format!(
"margins = b:{} l:{} r:{} t{}\n",
term.margin_bottom(),
term.margin_left(),
term.margin_right(),
term.margin_top()
));
assert_eq!(term.margin_bottom(), 3);
assert_eq!(term.margin_left(), 3);
assert_eq!(term.margin_right(), 3);
assert_eq!(term.margin_top(), 3);
term.set_margin_bottom(5);
term.set_margin_left(10);
term.set_margin_right(15);
term.set_margin_top(20);
assert_eq!(term.margin_bottom(), 5);
assert_eq!(term.margin_left(), 10);
assert_eq!(term.margin_right(), 15);
assert_eq!(term.margin_top(), 20);
term.append("Single character: '");
term.print_char('X');
term.append("', single UTF-8 character: '");
term.print_char_utf8('↑');
term.append("'\n");
let rr = term.redraw_rate();
assert_eq!(rr, 0.1, "Default redraw rate at startup");
term.append(&format!("Redraw rate {rr}\n"));
term.set_redraw_rate(1.0);
assert_eq!(term.redraw_rate(), 1.0);
term.set_redraw_rate(rr);
assert_eq!(term.redraw_rate(), rr);
let rs = term.redraw_style();
term.append(&format!("Redraw style {rs:?}\n"));
assert_eq!(
rs,
RedrawStyle::RateLimited,
"Default redraw style at startup"
);
term.set_redraw_style(RedrawStyle::NoRedraw);
assert_eq!(term.redraw_style(), RedrawStyle::NoRedraw);
term.set_redraw_style(rs);
assert_eq!(term.redraw_style(), rs);
// Sanity checks: enum values are implicitly assigned in the C++ code so could change unexpectedly
assert_eq!(
RedrawStyle::NoRedraw.bits(),
0x0000,
"RedrawStyle enum values have been reassigned"
);
assert_eq!(
RedrawStyle::RateLimited.bits(),
0x0001,
"RedrawStyle enum values have been reassigned"
);
assert_eq!(
RedrawStyle::PerWrite.bits(),
0x0002,
"RedrawStyle enum values have been reassigned"
);
let sb = term.scrollbar();
let hsb = term.hscrollbar();
// Both vertical and horizontal scrollbars are at zero
assert_eq!(sb.value(), 0.0);
assert_eq!(hsb.value(), 0.0);
term.set_hscrollbar_style(ScrollbarStyle::AUTO);
term.append(&format!(
"Scrollbar actual size {}\n",
term.scrollbar_actual_size()
));
assert_eq!(term.scrollbar_actual_size(), 16);
term.append(&format!("Scrollbar size {}\n", term.scrollbar_size()));
assert_eq!(
term.scrollbar_size(),
0,
"Default scrollbar size at startup"
);
term.set_scrollbar_size(40);
assert_eq!(term.scrollbar_size(), 40);
assert_eq!(term.scrollbar_actual_size(), 40);
term.append(&format!(
"Scrollbar actual size {}\n",
term.scrollbar_actual_size()
));
term.set_scrollbar_size(0); // Restore default
assert_eq!(term.scrollbar_size(), 0);
assert_eq!(term.scrollbar_actual_size(), 16);
let sfc = term.selection_fg_color();
let sbc = term.selection_bg_color();
assert_eq!(sfc, Color::Black);
assert_eq!(sbc, Color::White);
term.append(&format!("Selection colors: {sfc} {sbc}\n"));
term.set_selection_fg_color(Color::Green);
term.set_selection_bg_color(Color::DarkBlue);
assert_eq!(term.selection_fg_color(), Color::Green);
assert_eq!(term.selection_bg_color(), Color::DarkBlue);
term.set_selection_fg_color(sfc);
term.set_selection_bg_color(sbc);
assert_eq!(term.selection_fg_color(), Color::Black);
assert_eq!(term.selection_bg_color(), Color::White);
let tfcd = term.text_fg_color_default();
let tbcd = term.text_bg_color_default();
assert_eq!(tfcd, Color::XtermWhite);
assert_eq!(tbcd, Color::TransparentBg);
term.append(&format!("Default text colors: {sfc} {sbc}\n"));
term.set_text_fg_color_default(Color::Green);
term.set_text_bg_color_default(Color::DarkBlue);
assert_eq!(term.text_fg_color_default(), Color::Green);
assert_eq!(term.text_bg_color_default(), Color::DarkBlue);
term.set_text_fg_color_default(tfcd);
term.set_text_bg_color_default(tbcd);
assert_eq!(term.text_fg_color_default(), Color::XtermWhite);
assert_eq!(term.text_bg_color_default(), Color::TransparentBg);
let tfc = term.text_fg_color();
let tbc = term.text_bg_color();
assert_eq!(tfc, Color::XtermWhite);
assert_eq!(tbc, Color::TransparentBg);
term.append(&format!("Text colors: {sfc} {sbc}\n"));
term.set_text_fg_color(Color::Green);
term.set_text_bg_color(Color::DarkBlue);
assert_eq!(term.text_fg_color(), Color::Green);
assert_eq!(term.text_bg_color(), Color::DarkBlue);
term.set_text_fg_color(tfc);
term.set_text_bg_color(tbc);
assert_eq!(term.text_fg_color(), Color::XtermWhite);
assert_eq!(term.text_bg_color(), Color::TransparentBg);
let tf = term.text_font();
term.append(&format!("Text font: {tf:?}\n"));
assert_eq!(tf, Font::Courier);
term.set_text_font(Font::Screen);
assert_eq!(term.text_font(), Font::Screen);
term.set_text_font(tf);
assert_eq!(term.text_font(), Font::Courier);
let ts = term.text_size();
let r = term.h_to_row(100);
let c = term.w_to_col(100);
term.append(&format!("Text size: {ts}, h_to_row(100): {r}, w_to_col(100): {c}\n"));
assert_eq!(ts, 14);
term.set_text_size(30);
assert_eq!(term.text_size(), 30);
term.append(&format!("Text size: {}, h_to_row(100): {}, w_to_col(100): {}\n", term.text_size(), term.h_to_row(100), term.w_to_col(100)));
term.set_text_size(ts);
assert_eq!(term.text_size(), ts);
term.append(&format!("Text size: {}, h_to_row(100): {}, w_to_col(100): {}\n", term.text_size(), term.h_to_row(100), term.w_to_col(100)));
// Keyboard handler
term.handle({
move |term, e| {
match e {
fltk::enums::Event::KeyDown
if fltk::app::event_key() == fltk::enums::Key::Escape =>
{
// false to let FLTK handle ESC. true to hide ESC
false
}
fltk::enums::Event::KeyDown
if fltk::app::event_length() == 1 && fltk::app::is_event_ctrl() =>
{
// We handle control keystroke
let k = fltk::app::event_text();
term.append_utf8(&k);
true
}
fltk::enums::Event::KeyDown
if fltk::app::event_length() == 1 && !fltk::app::is_event_alt() =>
{
// We handle normal printable keystroke
let k = fltk::app::event_text();
term.take_focus().unwrap();
term.append(&k);
true
}
// fltk docs say that keyboard handler should always claim Focus and Unfocus events
// We can do this, or else ignore them (return false)
// fltk::enums::Event::Focus | fltk::enums::Event::Unfocus => {
// term.redraw();
// true
// }
_ => false, // Let FLTK handle everything else
}
}
});
let attr_save = term.text_attrib();
term.set_text_attrib(Attrib::Inverse | Attrib::Italic);
term.append("\nStartup tests complete. Keyboard is live.\n");
assert_eq!(term.text_attrib(), Attrib::Inverse | Attrib::Italic);
term.set_text_attrib(attr_save);
assert_eq!(term.text_attrib(), attr_save);
term.redraw();
}
});
app.run().unwrap();
}