pub struct Color { /* private fields */ }Expand description
Defines colors used by FLTK.
Colors are stored as RGBI values, the last being the index for FLTK colors in this enum.
Colors in this enum don’t have an RGB stored. However, custom colors have an RGB, and don’t have an index.
The RGBI can be acquired by casting the color to u32 and formatting it to 0x{08x}.
The last 2 digits are the hexadecimal representation of the color in this enum.
For example, Color::White, has a hex of 0x000000ff, ff being the 255 value of this enum.
A custom color like Color::from_u32(0x646464), will have an representation as 0x64646400,
of which the final 00 indicates that it is not stored in this enum.
For convenience, the fmt::Display trait is implemented so that the name of the Color is shown
when there is one, otherwise the RGB value is given.
Implementations§
source§impl Color
impl Color
sourcepub const ForeGround: Color = _
pub const ForeGround: Color = _
ForeGround, label colors
sourcepub const Foreground: Color = _
pub const Foreground: Color = _
Foreground, label colors
sourcepub const BackGround2: Color = _
pub const BackGround2: Color = _
BackGround2, Is the color inside input, output and text display widgets
sourcepub const Background2: Color = _
pub const Background2: Color = _
Background2, Is the color inside input, output and text display widgets
sourcepub const FrameDefault: Color = _
pub const FrameDefault: Color = _
FrameDefault
sourcepub const BackGround: Color = _
pub const BackGround: Color = _
BackGround
sourcepub const Background: Color = _
pub const Background: Color = _
Background
sourcepub const DarkYellow: Color = _
pub const DarkYellow: Color = _
DarkYellow
sourcepub const DarkMagenta: Color = _
pub const DarkMagenta: Color = _
DarkMagenta
sourcepub const XtermBlack: Color = _
pub const XtermBlack: Color = _
ANSI/xterm Black, not part of FLTK’s colormap
sourcepub const XtermGreen: Color = _
pub const XtermGreen: Color = _
ANSI/xterm Green, not part of FLTK’s colormap
sourcepub const XtermYellow: Color = _
pub const XtermYellow: Color = _
ANSI/xterm Yellow, not part of FLTK’s colormap
sourcepub const XtermMagenta: Color = _
pub const XtermMagenta: Color = _
ANSI/xterm Magenta, not part of FLTK’s colormap
sourcepub const XtermWhite: Color = _
pub const XtermWhite: Color = _
ANSI/xterm White, not part of FLTK’s colormap
sourcepub const XtermBgRed: Color = _
pub const XtermBgRed: Color = _
ANSI/xterm background Red, not part of FLTK’s colormap
sourcepub const XtermBgGreen: Color = _
pub const XtermBgGreen: Color = _
ANSI/xterm background Green, not part of FLTK’s colormap
sourcepub const XtermBgYellow: Color = _
pub const XtermBgYellow: Color = _
ANSI/xterm background Yelllow, not part of FLTK’s colormap
sourcepub const XtermBgBlue: Color = _
pub const XtermBgBlue: Color = _
ANSI/xterm background Blue, not part of FLTK’s colormap
sourcepub const XtermBgMagenta: Color = _
pub const XtermBgMagenta: Color = _
ANSI/xterm background Magenta, not part of FLTK’s colormap
sourcepub const XtermBgCyan: Color = _
pub const XtermBgCyan: Color = _
ANSI/xterm background Cyan, not part of FLTK’s colormap
sourcepub const XtermBgWhite: Color = _
pub const XtermBgWhite: Color = _
ANSI/xterm background White, not part of FLTK’s colormap
sourcepub const TransparentBg: Color = _
pub const TransparentBg: Color = _
Special background color value that lets the Terminal widget’s box() color show through behind the text. Not part of FLTK’s colormap
sourcepub const fn from_rgb(r: u8, g: u8, b: u8) -> Color
pub const fn from_rgb(r: u8, g: u8, b: u8) -> Color
Returns a color from RGB
Examples found in repository?
examples/flex.rs (line 10)
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fn main() {
let a = app::App::default().with_scheme(app::Scheme::Gtk);
let mut win = window::Window::default().with_size(640, 480);
let mut col = group::Flex::default_fill().column();
main_panel(&mut col);
col.end();
win.resizable(&col);
win.set_color(enums::Color::from_rgb(250, 250, 250));
win.end();
win.show();
win.size_range(600, 400, 0, 0);
a.run().unwrap();
}
fn buttons_panel(parent: &mut group::Flex) {
frame::Frame::default();
let w = frame::Frame::default().with_label("Welcome to Flex Login");
let mut urow = group::Flex::default().row();
{
frame::Frame::default()
.with_label("Username:")
.with_align(enums::Align::Inside | enums::Align::Right);
let username = input::Input::default();
urow.fixed(&username, 180);
urow.end();
}
let mut prow = group::Flex::default().row();
{
frame::Frame::default()
.with_label("Password:")
.with_align(enums::Align::Inside | enums::Align::Right);
let password = input::Input::default();
prow.fixed(&password, 180);
prow.end();
}
let pad = frame::Frame::default();
let mut brow = group::Flex::default().row();
{
frame::Frame::default();
let reg = create_button("Register");
let login = create_button("Login");
brow.fixed(®, 80);
brow.fixed(&login, 80);
brow.end();
}
let b = frame::Frame::default();
frame::Frame::default();
parent.fixed(&w, 60);
parent.fixed(&urow, 30);
parent.fixed(&prow, 30);
parent.fixed(&pad, 1);
parent.fixed(&brow, 30);
parent.fixed(&b, 30);
}
fn middle_panel(parent: &mut group::Flex) {
frame::Frame::default();
let mut frame = frame::Frame::default().with_label("Image");
frame.set_frame(enums::FrameType::BorderBox);
frame.set_color(enums::Color::from_rgb(0, 200, 0));
let spacer = frame::Frame::default();
let mut bp = group::Flex::default().column();
buttons_panel(&mut bp);
bp.end();
frame::Frame::default();
parent.fixed(&frame, 200);
parent.fixed(&spacer, 10);
parent.fixed(&bp, 300);
}
fn main_panel(parent: &mut group::Flex) {
frame::Frame::default();
let mut mp = group::Flex::default().row();
middle_panel(&mut mp);
mp.end();
frame::Frame::default();
parent.fixed(&mp, 200);
}
fn create_button(caption: &str) -> button::Button {
let mut btn = button::Button::default().with_label(caption);
btn.set_color(enums::Color::from_rgb(225, 225, 225));
btn
}More examples
examples/shapedwindow_taskbar.rs (line 35)
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fn main() {
let app = app::App::default();
// Act as the application in the taskbar (scroll to event handling)
let mut dock_win = window::Window::default()
.with_size(1, 1) // So we can place it at the center of the screen (needs a size >0 to be centered)
.with_label("TestApplication")
.center_screen();
dock_win.size_range(0, 0, 0, 0);
dock_win.make_resizable(false);
dock_win.show();
dock_win.end();
let mut win = window::Window::default()
.with_size(900, 500)
.with_label("TestApplication")
.center_screen();
win.set_color(enums::Color::from_rgb(26, 25, 55));
let mut but = button::Button::default()
.with_label("Button")
.with_size(80, 80)
.center_of_parent();
but.set_frame(enums::FrameType::OFlatFrame);
but.set_color(enums::Color::Cyan);
but.clear_visible_focus();
but.set_callback(|_| println!("Clicked"));
win.show();
win.end();
let win_shape = prep_shape(win.w(), win.h());
// Called after showing window
win.set_shape(Some(win_shape));
win.handle({
let mut x = 0;
let mut y = 0;
let mut dock_win = dock_win.clone();
move |wself, event| match event {
enums::Event::Push => {
let coords = app::event_coords();
x = coords.0;
y = coords.1;
true
}
enums::Event::Drag => {
wself.set_pos(app::event_x_root() - x, app::event_y_root() - y);
// Changing dock window position so it's close enough to the center of the application (not "visible" to user)
dock_win.set_pos(wself.x() + (wself.w() / 2), wself.y() + (wself.w() / 2));
true
}
enums::Event::Close => {
app.quit();
true
}
enums::Event::Hide => {
app.quit();
true
}
_ => false,
}
});
// Make main window appear when "opened" via Alt+Tab or Taskbar
dock_win.handle({
let mut win = win.clone();
move |_wself, event| match event {
enums::Event::Focus => {
let win_shape = prep_shape(win.w(), win.h());
win.show();
win.set_shape(Some(win_shape));
true
}
enums::Event::Hide => {
win.hide();
true
}
enums::Event::Close => {
app.quit();
true
}
_ => false,
}
});
app.run().unwrap();
}examples/terminal.rs (line 642)
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fn mb_test4_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
term.reset_terminal();
// Test the Utf8Char primitive
let uc = Utf8Char::new(b'Q');
let uc1 = uc.text_utf8();
assert_eq!(&uc1, &[b'Q']);
assert_eq!(&uc.attrib(), &Attrib::Normal);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::TransparentBg);
let ring_rows = term.ring_rows();
term.take_focus().unwrap();
term.clear_history();
assert_eq!(term.history_use(), 0);
// Subtract row numbers, modulo `rows`
fn row_diff(rows: i32, a: i32, b: i32) -> i32 {
match a - b {
n if n < 0 => n + rows,
n => n,
}
}
// disp_srow is always 1 greater than hist_erow, modulo (ring_rows+1)
assert_eq!(row_diff(ring_rows, term.disp_srow(), term.hist_erow()), 1);
assert!(term.disp_srow() >= 0);
assert!(term.disp_erow() >= 0);
assert!(term.hist_srow() >= 0);
assert!(term.hist_erow() >= 0);
assert!(term.offset() >= 0);
assert!(term.disp_srow() <= ring_rows);
assert!(term.disp_erow() <= ring_rows);
assert!(term.hist_srow() <= ring_rows);
assert!(term.hist_erow() <= ring_rows);
assert!(term.offset() <= ring_rows);
assert_eq!(term.ring_srow(), 0);
assert_eq!(term.ring_erow(), ring_rows - 1);
assert_eq!(
row_diff(ring_rows, term.disp_erow(), term.disp_srow()) + 1,
term.disp_rows()
);
assert_eq!(
row_diff(ring_rows, term.hist_erow(), term.hist_srow()) + 1,
term.hist_rows()
);
assert_eq!(term.ring_erow(), term.ring_rows() - 1);
assert_eq!(term.ring_srow(), 0);
// Check the different cols methods, which should all return the same answer
assert!(term.disp_cols() > 10);
assert_eq!(term.disp_cols(), term.ring_cols());
assert_eq!(term.disp_cols(), term.hist_cols());
// Redundant protected vs public methods:
assert_eq!(term.disp_cols(), term.display_columns());
assert_eq!(term.disp_rows(), term.display_rows());
/// Local function to read back all rows from the display into a long string.
/// Does not include scrollback history.
/// Trims trailing blanks on each line
fn read_disp(term: &Terminal) -> String {
let rows = term.display_rows();
let mut text: Vec<u8> = Vec::with_capacity((rows * 64) as usize);
for row in 0..rows {
let r = term.u8c_disp_row(row).trim();
// Iterate through a row, accumulating [u8]
for c in r.iter() {
// Note: Sometimes utf-8 length is > 1
text.extend_from_slice(c.text_utf8());
}
text.extend_from_slice(b"\n");
}
// Return the result as a string
std::str::from_utf8(&text).unwrap().to_string()
}
term.clear();
term.append("Top line ↑ (up-arrow)");
term.set_text_attrib(Attrib::Underline);
term.append(" ");
term.set_text_attrib(Attrib::Normal);
term.append(" \n");
let mut text_out = read_disp(term);
// Trim trailing empty lines
text_out = text_out.trim_end_matches(&"\n\n").to_string();
// The two plain blanks at the end will be trimmed, the two underlined blanks will be retained.
assert_eq!(text_out, "Top line ↑ (up-arrow) \n");
let r = term.u8c_disp_row(0);
assert_eq!(r.col(0).text_utf8(), b"T");
assert_eq!(r.col(10).text_utf8(), b"\xe2\x86\x91"); // UTF-8 up-arrow
assert_eq!(r.col(24).text_utf8(), b" "); // First blank after test text, NOT trimmed
let r = term.u8c_disp_row(1);
assert_eq!(r.col(0).text_utf8(), b" "); // Second row starts with blanks
assert_eq!(r.col(1).text_utf8(), b" "); // Second row is full of blanks
// Clear the screen again, then append test text, then read it back and compare
let test_text = "The wind was a torrent of darkness among the gusty trees.
The moon was a ghostly galleon tossed upon cloudy seas.
The road was a ribbon of moonlight over the purple moor,
And the highwayman came riding—
Riding—riding—
The highwayman came riding, up to the old inn-door.";
term.clear_history();
term.clear();
let bg_save = term.text_bg_color();
let fg_save = term.text_fg_color();
term.set_text_bg_color(Color::DarkBlue); // Set spooky colors
term.set_text_fg_color(Color::from_rgb(0x40, 0x40, 0xff));
term.append(test_text);
term.set_text_bg_color(bg_save);
term.set_text_fg_color(fg_save);
let mut text_out = read_disp(term);
// Trim trailing empty lines
text_out = text_out.trim_end_matches(&"\n\n").to_string();
assert_eq!(test_text, text_out);
assert_eq!(row_diff(ring_rows, term.disp_srow(), term.hist_erow()), 1);
assert_eq!(term.ring_srow(), 0);
assert_eq!(term.ring_erow(), ring_rows - 1);
assert_eq!(
row_diff(ring_rows, term.disp_erow(), term.disp_srow()) + 1,
term.disp_rows()
);
assert_eq!(
row_diff(ring_rows, term.hist_erow(), term.hist_srow()) + 1,
term.hist_rows()
);
term.append(&format!(
"\n\nScreen has {} rows of {} columns.\n",
term.disp_rows(),
term.disp_cols()
));
}
//--------------------------------------------------------------------------------------
/// Yet another set of tests for misc cursor functions and other stuff
/// Note: these tests depend heavily on the low-level "protected" parts of the fltk library, which should be used with caution.
fn mb_test5_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
// Test the attr_fg_color and attr_bg_color methods.
// Put a single character 'A' into the buffer and check it
term.clear(); // No reset_terminal(), just clear() to preserve the mouse selection for later
term.set_text_bg_color(Color::TransparentBg);
term.set_text_fg_color(Color::XtermWhite);
term.append("A");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"A");
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::TransparentBg);
assert_eq!(&uc.attr_bgcolor(Some(term)), &Color::Black);
assert_eq!(&uc.attr_fgcolor(Some(term)), &Color::XtermWhite);
assert_eq!(&uc.attrib(), &Attrib::Normal);
// Put a short string "BCD" into the first line of the buffer, with fg color change after the 'B' and bold after 'C'
term.clear();
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
assert_eq!(term.text_attrib(), Attrib::Normal);
assert!(term.ansi());
term.append("B\x1b[32mC\x1b[1mD\n");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"B");
assert!(uc.is_char(b'B'));
assert!(!uc.is_char(b'A'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(1);
assert_eq!(uc.text_utf8(), b"C");
assert!(uc.is_char(b'C'));
assert_eq!(&uc.fgcolor(), &Color::XtermGreen);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermGreen);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(2);
assert_eq!(uc.text_utf8(), b"D");
assert!(uc.is_char(b'D'));
assert_eq!(&uc.fgcolor(), &Color::XtermGreen);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::from_rgb(0x20, 0xf0, 0x20));
assert_eq!(&uc.attr_bgcolor(None), &Color::from_rgb(0x20, 0x20, 0x20));
assert_eq!(
&uc.attr_fgcolor(Some(term)),
&Color::from_rgb(0x20, 0xf0, 0x20)
);
assert_eq!(&uc.attr_bgcolor(None), &Color::from_rgb(0x20, 0x20, 0x20));
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
// Put a short string "BCDE" into the buffer, with fg color change after the 'B', bg change after 'C', and bold after 'D'
term.clear();
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
term.set_text_attrib(Attrib::Normal);
assert_eq!(term.text_attrib(), Attrib::Normal);
assert!(term.ansi());
term.append("B\x1b[37mC\x1b[44mD\x1b[1mE\n");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"B");
assert!(uc.is_char(b'B'));
assert!(!uc.is_char(b'A'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(1);
assert_eq!(uc.text_utf8(), b"C");
assert!(uc.is_char(b'C'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(2);
assert_eq!(uc.text_utf8(), b"D");
assert!(uc.is_char(b'D'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBgBlue);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBgBlue);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(3);
assert_eq!(uc.text_utf8(), b"E");
assert!(uc.is_char(b'E'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBgBlue);
assert_eq!(&uc.attr_fgcolor(None), &Color::from_hex(0xf0f0f0));
assert_eq!(&uc.attr_bgcolor(None), &Color::from_hex(0x2020e0));
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
// Test some miscellaneous Utf8 constants
assert_eq!(uc.length(), 1);
assert_eq!(uc.max_utf8(), 4);
assert_eq!(uc.pwidth(), 8.0);
assert_eq!(uc.pwidth_int(), 8);
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
term.clear();
term.set_text_attrib(Attrib::Normal);
// Mouse selection functions
term.append(&format!("Mouse selection: {:?}\n", &term.get_selection()));
term.clear_mouse_selection();
assert_eq!(term.get_selection(), None);
// Play with cursor position
term.append("0123456789\n"); // Set up test pattern
term.append("ABCDEFGHIJ\n");
term.append("abcdefghij\n");
term.set_cursor_row(1);
assert_eq!(term.cursor_row(), 1);
term.set_cursor_col(1);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"1");
term.append("----"); // Overwrites text at cursor and moves cursor forward
assert_eq!(term.cursor_row(), 1);
assert_eq!(term.cursor_col(), 5);
assert_eq!(term.u8c_cursor().text_utf8(), b"5");
term.set_cursor_col(1);
assert_eq!(term.u8c_cursor().text_utf8(), b"-"); // Overwritten text
term.cursor_up(1, false);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"o");
// Hit top of screen, so nothing happens
term.cursor_up(1, false);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"o");
// Hit top of screen with scroll enabled. A blank line from history is scrolled in.
term.cursor_up(1, true);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Go back down to the overwritten text
term.cursor_down(2, false);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"-");
// Go right past the overwritten text
term.cursor_right(4, false);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 5);
assert_eq!(term.u8c_cursor().text_utf8(), b"5");
// Go left to the end of the overwritten text
term.cursor_left(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"-");
// Scroll back down, removing the blank line at the top.
// Cursor stays in place, the text moves under it.
term.scroll(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"E");
// Clear from here to end-of-line
term.clear_eol();
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Now clear from here to start-of-line. Cursor does not move.
term.clear_sol();
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.cursor_left(1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.set_cursor_col(0);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Clear some lines
term.clear_line(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 0);
term.set_cursor_row(1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.set_cursor_row(3);
term.clear_cur_line();
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
assert_eq!(term.cursor_row(), 3);
assert_eq!(term.cursor_col(), 0);
term.append("Two lines above are intentionally left blank.\n");
assert_eq!(term.cursor_row(), 4);
assert_eq!(term.cursor_col(), 0);
// Set up the test pattern again, then play with insert/delete
term.append("0123456789\n");
term.append("ABCDEFGHIJ\n");
term.append("abcdefghij\n");
assert_eq!(term.cursor_row(), 7);
term.set_cursor_row(4);
term.set_cursor_col(4);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
term.insert_char('x', 5); // Push this row right 5 chars starting at col 4
assert_eq!(term.u8c_cursor().text_utf8(), b"x");
term.cursor_right(5, false);
assert_eq!(term.cursor_col(), 9);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
// Insert two blank rows above cursor. Cursor stays put.
term.insert_rows(2);
assert_eq!(term.cursor_row(), 4);
assert_eq!(term.cursor_col(), 9);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.cursor_down(2, false); // Go down to find our text again
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
// Go back to the beginning of the inserted 'x' characters and delete them.
term.cursor_left(5);
assert_eq!(term.u8c_cursor().text_utf8(), b"x");
term.delete_cur_chars(5);
assert_eq!(term.cursor_row(), 6);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
term.delete_chars(7, 2, 2); // Delete "CD" from the next row
term.cursor_down(1, false);
term.cursor_left(2);
assert_eq!(term.u8c_cursor().text_utf8(), b"E");
term.delete_rows(1); // Middle row of pattern is gone, cursor stays put
assert_eq!(term.u8c_cursor().text_utf8(), b"c");
term.cursor_up(1, false);
term.delete_rows(2); // Delete remains of test pattern
term.set_text_attrib(Attrib::Bold);
term.insert_char_eol('-', 3, 15, 20);
term.set_cursor_row(3);
term.set_cursor_col(15);
assert_eq!(term.u8c_cursor().text_utf8(), b"-"); // Check the insertion
assert_eq!(term.u8c_cursor().attrib(), Attrib::Bold);
term.set_text_attrib(Attrib::Italic);
term.append(" and all lines below");
term.set_text_attrib(Attrib::Normal);
term.cursor_down(1, false);
}sourcepub const fn from_rgba(r: u8, g: u8, b: u8, a: u8) -> Color
Available on crate feature enable-glwindow only.
pub const fn from_rgba(r: u8, g: u8, b: u8, a: u8) -> Color
enable-glwindow only.Returns a color from RGB
sourcepub fn from_rgba_tuple(tup: (u8, u8, u8, u8)) -> Color
pub fn from_rgba_tuple(tup: (u8, u8, u8, u8)) -> Color
Create color from RGBA using alpha compositing. Works for non-group types.
sourcepub const fn from_u32(val: u32) -> Color
pub const fn from_u32(val: u32) -> Color
Returns a color from hex or decimal
Examples found in repository?
More examples
examples/custom_dial.rs (line 70)
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fn main() {
let app = app::App::default();
app::background(255, 255, 255);
let mut win = window::Window::default().with_size(400, 300);
let mut dial = MyDial::new(100, 100, 200, 200, "CPU Load %");
dial.set_label_size(22);
dial.set_label_color(Color::from_u32(0x797979));
win.end();
win.show();
// get the cpu load value from somewhere, then call dial.set_value() in a callback or event loop
dial.set_value(10);
app.run().unwrap();
}examples/table.rs (line 66)
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fn draw_data(txt: &str, x: i32, y: i32, w: i32, h: i32, selected: bool) {
draw::push_clip(x, y, w, h);
if selected {
draw::set_draw_color(enums::Color::from_u32(0x00D3_D3D3));
} else {
draw::set_draw_color(enums::Color::White);
}
draw::draw_rectf(x, y, w, h);
draw::set_draw_color(enums::Color::Gray0);
draw::set_font(enums::Font::Helvetica, 14);
draw::draw_text2(txt, x, y, w, h, enums::Align::Center);
draw::draw_rect(x, y, w, h);
draw::pop_clip();
}examples/editor2.rs (line 80)
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pub fn new(buf: text::TextBuffer) -> Self {
let mut editor = text::TextEditor::new(5, 35, 790, 560, "");
editor.set_buffer(Some(buf));
#[cfg(target_os = "macos")]
editor.resize(5, 5, 790, 590);
editor.set_scrollbar_size(15);
editor.set_text_font(Font::Courier);
editor.set_linenumber_width(32);
editor.set_linenumber_fgcolor(Color::from_u32(0x008b_8386));
editor.set_trigger(CallbackTrigger::Changed);
Self { editor }
}examples/spreadsheet.rs (line 132)
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fn draw_data(txt: &str, x: i32, y: i32, w: i32, h: i32, selected: bool) {
draw::push_clip(x, y, w, h);
if selected {
draw::set_draw_color(enums::Color::from_u32(0x00D3_D3D3));
} else {
draw::set_draw_color(enums::Color::White);
}
draw::draw_rectf(x, y, w, h);
draw::set_draw_color(enums::Color::Gray0);
draw::set_font(enums::Font::Helvetica, 14);
draw::draw_text2(txt, x, y, w, h, enums::Align::Center);
draw::draw_rect(x, y, w, h);
draw::pop_clip();
}examples/composite_widgets.rs (line 12)
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pub fn new(w: i32, h: i32) -> MyButton {
let mut grp = group::Group::new(0, 0, w, h, None);
grp.set_frame(enums::FrameType::RFlatBox);
grp.set_color(enums::Color::from_u32(0x01579b));
grp.set_align(enums::Align::Center);
let mut btn = button::Button::new(grp.x() + 420, grp.y() + 35, 30, 25, "@1+");
btn.set_frame(enums::FrameType::OFlatFrame);
btn.set_color(enums::Color::from_u32(0xf49da9));
btn.set_callback(move |b| b.parent().unwrap().hide());
grp.end();
grp.handle(|g, ev| match ev {
enums::Event::Push => {
g.do_callback();
true
}
_ => false,
});
MyButton { grp }
}Additional examples can be found in:
sourcepub const fn from_hex(val: u32) -> Color
pub const fn from_hex(val: u32) -> Color
Returns a color from hex or decimal
Examples found in repository?
More examples
examples/calculator2.rs (line 43)
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pub fn new(title: &'static str) -> MyButton {
let mut b = Button::new(0, 0, 100, 0, title);
b.set_label_size(24);
b.set_frame(FrameType::FlatBox);
match title {
"CE" => {
b.set_color(Color::from_hex(0xd50000));
b.set_shortcut(Shortcut::None | Key::Delete);
}
"x" | "/" | "+" | "-" | "=" | "C" | "@<-" => {
b.set_color(Color::from_hex(0xffee58));
b.set_label_color(Color::Black);
let shortcut = if title == "x" {
'*'
} else {
title.chars().next().unwrap()
};
b.set_shortcut(Shortcut::None | shortcut);
if shortcut == '@' {
b.set_shortcut(Shortcut::None | Key::BackSpace);
}
if shortcut == '=' {
b.set_shortcut(Shortcut::None | Key::Enter);
}
}
_ => {
if title == "0" {
b.resize(0, 0, 100 * 2, 0);
}
b.set_label_color(Color::White);
b.set_selection_color(Color::from_hex(0x1b1b1b));
b.set_shortcut(Shortcut::None | title.chars().next().unwrap());
b.handle(move |b, ev| match ev {
Event::Enter => {
b.set_color(Color::from_hex(0x2b2b2b));
b.redraw();
true
}
Event::Leave => {
b.set_color(Color::from_hex(0x424242));
b.redraw();
true
}
_ => false,
});
}
}
Self { b }
}
}
impl Deref for MyButton {
type Target = Button;
fn deref(&self) -> &Self::Target {
&self.b
}
}
impl DerefMut for MyButton {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.b
}
}
fn main() {
let app = app::App::default();
app::set_visible_focus(false);
app::background(0x42, 0x42, 0x42);
let win_w = 400;
let win_h = 500;
let but_row = 160;
let mut operation = Ops::None;
let mut txt = String::from("0");
let mut old_val = String::from("0");
let mut new_val: String;
let mut wind = Window::default()
.with_label("FLTK Calc")
.with_size(win_w, win_h)
.center_screen();
let mut out = Frame::new(0, 0, win_w, 160, "").with_align(Align::Right | Align::Inside);
out.set_color(Color::from_hex(0x1b1b1b));
out.set_frame(FrameType::FlatBox);
out.set_label_color(Color::White);
out.set_label_size(36);
out.set_label("0");
let vpack = Pack::new(0, but_row, win_w, win_h - 170, "");
let mut hpack = Pack::new(0, 0, win_w, 68, "");
let but_ce = MyButton::new("CE");
let but_c = MyButton::new("C");
let but_back = MyButton::new("@<-");
let but_div = MyButton::new("/");
hpack.end();
hpack.set_type(PackType::Horizontal);
let mut hpack = Pack::new(0, 0, win_w, 68, "");
let mut but7 = MyButton::new("7");
let mut but8 = MyButton::new("8");
let mut but9 = MyButton::new("9");
let but_mul = MyButton::new("x");
hpack.end();
hpack.set_type(PackType::Horizontal);
let mut hpack = Pack::new(0, 0, win_w, 68, "");
let mut but4 = MyButton::new("4");
let mut but5 = MyButton::new("5");
let mut but6 = MyButton::new("6");
let but_sub = MyButton::new("-");
hpack.end();
hpack.set_type(PackType::Horizontal);
let mut hpack = Pack::new(0, 0, win_w, 68, "");
let mut but1 = MyButton::new("1");
let mut but2 = MyButton::new("2");
let mut but3 = MyButton::new("3");
let but_add = MyButton::new("+");
hpack.end();
hpack.set_type(PackType::Horizontal);
let mut hpack = Pack::new(0, 0, win_w, 68, "");
let mut but_dot = MyButton::new(".");
let mut but0 = MyButton::new("0");
let but_eq = MyButton::new("=");
hpack.end();
hpack.set_type(PackType::Horizontal);
vpack.end();
wind.make_resizable(false);
wind.end();
wind.show();
app::set_focus(&*but1);
app::get_system_colors();
let but_vec = vec![
&mut but1, &mut but2, &mut but3, &mut but4, &mut but5, &mut but6, &mut but7, &mut but8,
&mut but9, &mut but0,
];
let but_op_vec = vec![
but_add, but_sub, but_mul, but_div, but_c, but_ce, but_back, but_eq,
];
let (s, r) = app::channel::<Message>();
for but in but_vec {
let label = but.label();
but.emit(s, Message::Number(label.parse().unwrap()));
}
for mut but in but_op_vec {
let op = match but.label().as_str() {
"+" => Ops::Add,
"-" => Ops::Sub,
"x" => Ops::Mul,
"/" => Ops::Div,
"=" => Ops::Eq,
"CE" => Ops::CE,
"C" => Ops::C,
"@<-" => Ops::Back,
_ => Ops::None,
};
but.emit(s, Message::Op(op));
}
but_dot.emit(s, Message::Dot);
while app.wait() {
if let Some(val) = r.recv() {
match val {
Message::Number(num) => {
if out.label() == "0" {
txt.clear();
}
txt.push_str(&num.to_string());
out.set_label(txt.as_str());
}
Message::Dot => {
if operation == Ops::Eq {
txt.clear();
operation = Ops::None;
out.set_label("0.");
txt.push_str("0.");
}
if !txt.contains('.') {
txt.push('.');
out.set_label(txt.as_str());
}
}
Message::Op(op) => match op {
Ops::Add | Ops::Sub | Ops::Div | Ops::Mul => {
old_val.clear();
old_val.push_str(&out.label());
operation = op;
out.set_label("0");
}
Ops::Back => {
let val = out.label();
txt.pop();
if val.len() > 1 {
out.set_label(txt.as_str());
} else {
out.set_label("0");
}
}
Ops::CE => {
txt.clear();
old_val.clear();
txt.push('0');
out.set_label(txt.as_str());
}
Ops::C => {
txt.clear();
txt.push('0');
out.set_label(txt.as_str());
}
Ops::Eq => {
new_val = out.label();
let old: f64 = old_val.parse().unwrap();
let new: f64 = new_val.parse().unwrap();
let val = match operation {
Ops::Div => old / new,
Ops::Mul => old * new,
Ops::Add => old + new,
Ops::Sub => old - new,
_ => new,
};
operation = Ops::None;
txt = String::from("0");
out.set_label(&val.to_string());
}
_ => (),
},
}
}
}
}examples/terminal.rs (line 144)
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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");
// 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
// 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();
assert!(dr > 20, "Default display_rows at startup");
term.set_display_rows(60);
assert_eq!(term.display_rows(), 60);
term.set_display_rows(dr); // Set back to default
assert_eq!(term.display_rows(), dr);
// 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);
let hl = term.history_lines();
assert_eq!(hl, 100, "Default history_lines at startup");
term.set_history_lines(60);
assert_eq!(term.history_lines(), 60);
term.set_history_lines(hl); // Set back to default
assert_eq!(term.history_lines(), hl);
// Is history_rows() an alias for history_lines()?
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_lines(100); // Set back to default
assert_eq!(term.history_lines(), 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"
);
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();
term.append(&format!("Text size: {ts}\n"));
assert_eq!(ts, 14);
term.set_text_size(30);
assert_eq!(term.text_size(), 30);
term.set_text_size(ts);
assert_eq!(term.text_size(), ts);
// 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();
}
//--------------------------------------------------------------------------------------
/// More tests that run when the menu bar Test1 is clicked
fn mb_test1_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
term.reset_terminal();
term.append("0123456789 0\n");
term.append("0123456789 1\n");
term.append("0123456789 2\n");
term.append("0123456789 3\n");
term.append("0123456789 4\n");
term.append("0123456789 5\n");
term.append("0123456789 6\n");
term.append("0123456789 7\n");
term.append("0123456789 8\n");
term.append("0123456789 9\n");
term.append("------------\n");
term.set_text_fg_color(Color::Green);
term.plot_char('A', 0, 0);
term.plot_char('B', 1, 1);
term.plot_char('C', 2, 2);
term.plot_char('D', 3, 3);
term.plot_char('E', 4, 4);
term.plot_char('F', 5, 5);
term.set_text_fg_color(Color::XtermWhite);
assert_eq!(term.cursor_row(), 11);
assert_eq!(term.cursor_col(), 0);
term.set_text_bg_color(Color::DarkBlue);
term.plot_char_utf8('b', 8, 1);
term.plot_char_utf8('↑', 9, 1);
term.plot_char_utf8('c', 8, 2);
term.plot_char_utf8('↑', 9, 2);
term.plot_char_utf8('d', 8, 3);
term.plot_char_utf8('↑', 9, 3);
term.plot_char_utf8('e', 8, 4);
term.plot_char_utf8('↑', 9, 4);
term.plot_char_utf8('f', 8, 5);
term.plot_char_utf8('↑', 9, 5);
term.plot_char_utf8('g', 8, 6);
term.plot_char_utf8('↑', 9, 6);
term.set_text_bg_color(Color::TransparentBg);
term.set_text_attrib(Attrib::Inverse | Attrib::Italic);
term.append("Done!\n");
term.set_text_attrib(Attrib::Normal);
}
//--------------------------------------------------------------------------------------
/// More tests that run when the menu bar button Test2 is clicked
fn mb_test2_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
term.reset_terminal();
for i in 0..50 {
term.append(&format!("{i}\n"));
}
assert_eq!(term.history_rows(), 100);
assert_eq!(term.history_lines(), 100);
term.clear_history();
assert_eq!(term.history_use(), 0);
term.set_text_attrib(Attrib::Inverse | Attrib::Italic);
term.append("\nDone!\n");
term.set_text_attrib(Attrib::Normal);
}
//--------------------------------------------------------------------------------------
/// Another set of tests that run when Test3 is clicked
fn mb_test3_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
term.reset_terminal();
assert_eq!(term.text_bg_color_default(), Color::TransparentBg);
assert_eq!(term.history_use(), 0);
term.clear();
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.history_use(), term.display_rows()); // A screenful of lines added to history
term.append("Test\ntext\na\nb\nc\nd");
assert_eq!(term.cursor_row(), 5);
let hist = term.history_use();
term.clear_screen_home(false);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.history_use(), hist); // History not changed
term.append("Test\ntext\na\nb\nc\nd\ne");
assert_eq!(term.cursor_row(), 6);
term.clear_screen_home(true);
assert_eq!(term.cursor_row(), 0);
term.append("Test\ntext\na\nb\nc\n");
assert_eq!(term.cursor_row(), 5);
term.clear_to_color(Color::DarkBlue);
assert_eq!(term.text_bg_color_default(), Color::TransparentBg);
assert_eq!(term.text_bg_color(), Color::TransparentBg);
assert_eq!(term.cursor_row(), 0);
// Test cursor_home()
term.append("Test\n\n\n\n\n\n\n\n\n\n");
assert_eq!(term.cursor_row(), 10);
term.cursor_home();
assert_eq!(term.cursor_row(), 0);
// Test the widget color
assert_eq!(term.color(), Color::Black); // Default
term.set_color(Color::DarkGreen);
assert_eq!(term.color(), Color::DarkGreen);
term.set_color(Color::Black);
assert_eq!(term.color(), Color::Black);
term.append(
"This should be one line of white text on black, embedded into the top of a blue field.\n",
);
assert_eq!(term.output_translate(), OutFlags::LF_TO_CRLF); // default
term.set_output_translate(OutFlags::OFF);
assert_eq!(term.output_translate(), OutFlags::OFF);
term.set_output_translate(OutFlags::LF_TO_CRLF); // restore default
assert_eq!(term.output_translate(), OutFlags::LF_TO_CRLF);
term.set_text_attrib(Attrib::Inverse | Attrib::Italic);
term.append("\nDone!\n");
term.set_text_attrib(Attrib::Normal);
}
//--------------------------------------------------------------------------------------
/// Another set of tests for the ring-buffer access methods
/// Note: these tests depend heavily on the low-level "protected" parts of the fltk library, which should be used with caution.
fn mb_test4_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
term.reset_terminal();
// Test the Utf8Char primitive
let uc = Utf8Char::new(b'Q');
let uc1 = uc.text_utf8();
assert_eq!(&uc1, &[b'Q']);
assert_eq!(&uc.attrib(), &Attrib::Normal);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::TransparentBg);
let ring_rows = term.ring_rows();
term.take_focus().unwrap();
term.clear_history();
assert_eq!(term.history_use(), 0);
// Subtract row numbers, modulo `rows`
fn row_diff(rows: i32, a: i32, b: i32) -> i32 {
match a - b {
n if n < 0 => n + rows,
n => n,
}
}
// disp_srow is always 1 greater than hist_erow, modulo (ring_rows+1)
assert_eq!(row_diff(ring_rows, term.disp_srow(), term.hist_erow()), 1);
assert!(term.disp_srow() >= 0);
assert!(term.disp_erow() >= 0);
assert!(term.hist_srow() >= 0);
assert!(term.hist_erow() >= 0);
assert!(term.offset() >= 0);
assert!(term.disp_srow() <= ring_rows);
assert!(term.disp_erow() <= ring_rows);
assert!(term.hist_srow() <= ring_rows);
assert!(term.hist_erow() <= ring_rows);
assert!(term.offset() <= ring_rows);
assert_eq!(term.ring_srow(), 0);
assert_eq!(term.ring_erow(), ring_rows - 1);
assert_eq!(
row_diff(ring_rows, term.disp_erow(), term.disp_srow()) + 1,
term.disp_rows()
);
assert_eq!(
row_diff(ring_rows, term.hist_erow(), term.hist_srow()) + 1,
term.hist_rows()
);
assert_eq!(term.ring_erow(), term.ring_rows() - 1);
assert_eq!(term.ring_srow(), 0);
// Check the different cols methods, which should all return the same answer
assert!(term.disp_cols() > 10);
assert_eq!(term.disp_cols(), term.ring_cols());
assert_eq!(term.disp_cols(), term.hist_cols());
// Redundant protected vs public methods:
assert_eq!(term.disp_cols(), term.display_columns());
assert_eq!(term.disp_rows(), term.display_rows());
/// Local function to read back all rows from the display into a long string.
/// Does not include scrollback history.
/// Trims trailing blanks on each line
fn read_disp(term: &Terminal) -> String {
let rows = term.display_rows();
let mut text: Vec<u8> = Vec::with_capacity((rows * 64) as usize);
for row in 0..rows {
let r = term.u8c_disp_row(row).trim();
// Iterate through a row, accumulating [u8]
for c in r.iter() {
// Note: Sometimes utf-8 length is > 1
text.extend_from_slice(c.text_utf8());
}
text.extend_from_slice(b"\n");
}
// Return the result as a string
std::str::from_utf8(&text).unwrap().to_string()
}
term.clear();
term.append("Top line ↑ (up-arrow)");
term.set_text_attrib(Attrib::Underline);
term.append(" ");
term.set_text_attrib(Attrib::Normal);
term.append(" \n");
let mut text_out = read_disp(term);
// Trim trailing empty lines
text_out = text_out.trim_end_matches(&"\n\n").to_string();
// The two plain blanks at the end will be trimmed, the two underlined blanks will be retained.
assert_eq!(text_out, "Top line ↑ (up-arrow) \n");
let r = term.u8c_disp_row(0);
assert_eq!(r.col(0).text_utf8(), b"T");
assert_eq!(r.col(10).text_utf8(), b"\xe2\x86\x91"); // UTF-8 up-arrow
assert_eq!(r.col(24).text_utf8(), b" "); // First blank after test text, NOT trimmed
let r = term.u8c_disp_row(1);
assert_eq!(r.col(0).text_utf8(), b" "); // Second row starts with blanks
assert_eq!(r.col(1).text_utf8(), b" "); // Second row is full of blanks
// Clear the screen again, then append test text, then read it back and compare
let test_text = "The wind was a torrent of darkness among the gusty trees.
The moon was a ghostly galleon tossed upon cloudy seas.
The road was a ribbon of moonlight over the purple moor,
And the highwayman came riding—
Riding—riding—
The highwayman came riding, up to the old inn-door.";
term.clear_history();
term.clear();
let bg_save = term.text_bg_color();
let fg_save = term.text_fg_color();
term.set_text_bg_color(Color::DarkBlue); // Set spooky colors
term.set_text_fg_color(Color::from_rgb(0x40, 0x40, 0xff));
term.append(test_text);
term.set_text_bg_color(bg_save);
term.set_text_fg_color(fg_save);
let mut text_out = read_disp(term);
// Trim trailing empty lines
text_out = text_out.trim_end_matches(&"\n\n").to_string();
assert_eq!(test_text, text_out);
assert_eq!(row_diff(ring_rows, term.disp_srow(), term.hist_erow()), 1);
assert_eq!(term.ring_srow(), 0);
assert_eq!(term.ring_erow(), ring_rows - 1);
assert_eq!(
row_diff(ring_rows, term.disp_erow(), term.disp_srow()) + 1,
term.disp_rows()
);
assert_eq!(
row_diff(ring_rows, term.hist_erow(), term.hist_srow()) + 1,
term.hist_rows()
);
term.append(&format!(
"\n\nScreen has {} rows of {} columns.\n",
term.disp_rows(),
term.disp_cols()
));
}
//--------------------------------------------------------------------------------------
/// Yet another set of tests for misc cursor functions and other stuff
/// Note: these tests depend heavily on the low-level "protected" parts of the fltk library, which should be used with caution.
fn mb_test5_cb(_choice: &mut fltk::menu::Choice, term: &mut Terminal) {
term.take_focus().unwrap();
// Test the attr_fg_color and attr_bg_color methods.
// Put a single character 'A' into the buffer and check it
term.clear(); // No reset_terminal(), just clear() to preserve the mouse selection for later
term.set_text_bg_color(Color::TransparentBg);
term.set_text_fg_color(Color::XtermWhite);
term.append("A");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"A");
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::TransparentBg);
assert_eq!(&uc.attr_bgcolor(Some(term)), &Color::Black);
assert_eq!(&uc.attr_fgcolor(Some(term)), &Color::XtermWhite);
assert_eq!(&uc.attrib(), &Attrib::Normal);
// Put a short string "BCD" into the first line of the buffer, with fg color change after the 'B' and bold after 'C'
term.clear();
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
assert_eq!(term.text_attrib(), Attrib::Normal);
assert!(term.ansi());
term.append("B\x1b[32mC\x1b[1mD\n");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"B");
assert!(uc.is_char(b'B'));
assert!(!uc.is_char(b'A'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(1);
assert_eq!(uc.text_utf8(), b"C");
assert!(uc.is_char(b'C'));
assert_eq!(&uc.fgcolor(), &Color::XtermGreen);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermGreen);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(2);
assert_eq!(uc.text_utf8(), b"D");
assert!(uc.is_char(b'D'));
assert_eq!(&uc.fgcolor(), &Color::XtermGreen);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::from_rgb(0x20, 0xf0, 0x20));
assert_eq!(&uc.attr_bgcolor(None), &Color::from_rgb(0x20, 0x20, 0x20));
assert_eq!(
&uc.attr_fgcolor(Some(term)),
&Color::from_rgb(0x20, 0xf0, 0x20)
);
assert_eq!(&uc.attr_bgcolor(None), &Color::from_rgb(0x20, 0x20, 0x20));
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
// Put a short string "BCDE" into the buffer, with fg color change after the 'B', bg change after 'C', and bold after 'D'
term.clear();
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
term.set_text_attrib(Attrib::Normal);
assert_eq!(term.text_attrib(), Attrib::Normal);
assert!(term.ansi());
term.append("B\x1b[37mC\x1b[44mD\x1b[1mE\n");
let r = &term.u8c_disp_row(0);
let uc = r.col(0);
assert_eq!(uc.text_utf8(), b"B");
assert!(uc.is_char(b'B'));
assert!(!uc.is_char(b'A'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(1);
assert_eq!(uc.text_utf8(), b"C");
assert!(uc.is_char(b'C'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBlack);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBlack);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(2);
assert_eq!(uc.text_utf8(), b"D");
assert!(uc.is_char(b'D'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBgBlue);
assert_eq!(&uc.attr_fgcolor(None), &Color::XtermWhite);
assert_eq!(&uc.attr_bgcolor(None), &Color::XtermBgBlue);
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
let uc = r.col(3);
assert_eq!(uc.text_utf8(), b"E");
assert!(uc.is_char(b'E'));
assert_eq!(&uc.fgcolor(), &Color::XtermWhite);
assert_eq!(&uc.bgcolor(), &Color::XtermBgBlue);
assert_eq!(&uc.attr_fgcolor(None), &Color::from_hex(0xf0f0f0));
assert_eq!(&uc.attr_bgcolor(None), &Color::from_hex(0x2020e0));
assert_eq!(
&uc.charflags(),
&(CharFlags::FG_XTERM | CharFlags::BG_XTERM)
);
// Test some miscellaneous Utf8 constants
assert_eq!(uc.length(), 1);
assert_eq!(uc.max_utf8(), 4);
assert_eq!(uc.pwidth(), 8.0);
assert_eq!(uc.pwidth_int(), 8);
term.set_text_fg_color_xterm(fltk::group::experimental::XtermColor::White);
term.set_text_bg_color_xterm(fltk::group::experimental::XtermColor::Black);
term.clear();
term.set_text_attrib(Attrib::Normal);
// Mouse selection functions
term.append(&format!("Mouse selection: {:?}\n", &term.get_selection()));
term.clear_mouse_selection();
assert_eq!(term.get_selection(), None);
// Play with cursor position
term.append("0123456789\n"); // Set up test pattern
term.append("ABCDEFGHIJ\n");
term.append("abcdefghij\n");
term.set_cursor_row(1);
assert_eq!(term.cursor_row(), 1);
term.set_cursor_col(1);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"1");
term.append("----"); // Overwrites text at cursor and moves cursor forward
assert_eq!(term.cursor_row(), 1);
assert_eq!(term.cursor_col(), 5);
assert_eq!(term.u8c_cursor().text_utf8(), b"5");
term.set_cursor_col(1);
assert_eq!(term.u8c_cursor().text_utf8(), b"-"); // Overwritten text
term.cursor_up(1, false);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"o");
// Hit top of screen, so nothing happens
term.cursor_up(1, false);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"o");
// Hit top of screen with scroll enabled. A blank line from history is scrolled in.
term.cursor_up(1, true);
assert_eq!(term.cursor_row(), 0);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Go back down to the overwritten text
term.cursor_down(2, false);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 1);
assert_eq!(term.u8c_cursor().text_utf8(), b"-");
// Go right past the overwritten text
term.cursor_right(4, false);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 5);
assert_eq!(term.u8c_cursor().text_utf8(), b"5");
// Go left to the end of the overwritten text
term.cursor_left(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"-");
// Scroll back down, removing the blank line at the top.
// Cursor stays in place, the text moves under it.
term.scroll(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"E");
// Clear from here to end-of-line
term.clear_eol();
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Now clear from here to start-of-line. Cursor does not move.
term.clear_sol();
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.cursor_left(1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.set_cursor_col(0);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
// Clear some lines
term.clear_line(1);
assert_eq!(term.cursor_row(), 2);
assert_eq!(term.cursor_col(), 0);
term.set_cursor_row(1);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.set_cursor_row(3);
term.clear_cur_line();
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
assert_eq!(term.cursor_row(), 3);
assert_eq!(term.cursor_col(), 0);
term.append("Two lines above are intentionally left blank.\n");
assert_eq!(term.cursor_row(), 4);
assert_eq!(term.cursor_col(), 0);
// Set up the test pattern again, then play with insert/delete
term.append("0123456789\n");
term.append("ABCDEFGHIJ\n");
term.append("abcdefghij\n");
assert_eq!(term.cursor_row(), 7);
term.set_cursor_row(4);
term.set_cursor_col(4);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
term.insert_char('x', 5); // Push this row right 5 chars starting at col 4
assert_eq!(term.u8c_cursor().text_utf8(), b"x");
term.cursor_right(5, false);
assert_eq!(term.cursor_col(), 9);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
// Insert two blank rows above cursor. Cursor stays put.
term.insert_rows(2);
assert_eq!(term.cursor_row(), 4);
assert_eq!(term.cursor_col(), 9);
assert_eq!(term.u8c_cursor().text_utf8(), b" ");
term.cursor_down(2, false); // Go down to find our text again
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
// Go back to the beginning of the inserted 'x' characters and delete them.
term.cursor_left(5);
assert_eq!(term.u8c_cursor().text_utf8(), b"x");
term.delete_cur_chars(5);
assert_eq!(term.cursor_row(), 6);
assert_eq!(term.cursor_col(), 4);
assert_eq!(term.u8c_cursor().text_utf8(), b"4");
term.delete_chars(7, 2, 2); // Delete "CD" from the next row
term.cursor_down(1, false);
term.cursor_left(2);
assert_eq!(term.u8c_cursor().text_utf8(), b"E");
term.delete_rows(1); // Middle row of pattern is gone, cursor stays put
assert_eq!(term.u8c_cursor().text_utf8(), b"c");
term.cursor_up(1, false);
term.delete_rows(2); // Delete remains of test pattern
term.set_text_attrib(Attrib::Bold);
term.insert_char_eol('-', 3, 15, 20);
term.set_cursor_row(3);
term.set_cursor_col(15);
assert_eq!(term.u8c_cursor().text_utf8(), b"-"); // Check the insertion
assert_eq!(term.u8c_cursor().attrib(), Attrib::Bold);
term.set_text_attrib(Attrib::Italic);
term.append(" and all lines below");
term.set_text_attrib(Attrib::Normal);
term.cursor_down(1, false);
}sourcepub fn from_hex_str(col: &str) -> Result<Color, FltkError>
pub fn from_hex_str(col: &str) -> Result<Color, FltkError>
Return a Color from a hex color format (#xxxxxx)
sourcepub fn to_hex_str(&self) -> String
pub fn to_hex_str(&self) -> String
Returns the color in hex string format
sourcepub fn by_index(idx: u8) -> Color
pub fn by_index(idx: u8) -> Color
Returns a color by index of RGBI
Examples found in repository?
examples/tile.rs (line 26)
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fn main() {
let app = app::App::default();
let mut window = window::Window::default().with_size(300, 300);
window.set_frame(FrameType::NoBox);
window.make_resizable(true);
let dx = 20;
let dy = dx; // border width of resizable() - see below
let tile = group::Tile::default_fill();
// create the symmetrical resize box with dx and dy pixels distance, resp.
// from the borders of the Fl_Tile widget before all other children
let r = frame::Frame::new(
tile.x() + dx,
tile.y() + dy,
tile.w() - 2 * dx,
tile.h() - 2 * dy,
None,
);
tile.resizable(&r);
let mut box0 = frame::Frame::new(0, 0, 150, 150, "0");
box0.set_frame(FrameType::DownBox);
box0.set_color(Color::by_index(9));
box0.set_label_size(36);
box0.set_align(Align::Clip);
let mut w1 = window::Window::new(150, 0, 150, 150, "1");
w1.set_frame(FrameType::NoBox);
let mut box1 = frame::Frame::new(0, 0, 150, 150, "1\nThis is a child window");
box1.set_frame(FrameType::DownBox);
box1.set_color(Color::by_index(19));
box1.set_label_size(18);
box1.set_align(Align::Clip | Align::Inside | Align::Wrap);
w1.resizable(&box1);
w1.end();
let mut box2a = frame::Frame::new(0, 150, 70, 150, "2a");
box2a.set_frame(FrameType::DownBox);
box2a.set_color(Color::by_index(12));
box2a.set_label_size(36);
box2a.set_align(Align::Clip);
let mut box2b = frame::Frame::new(70, 150, 80, 150, "2b");
box2b.set_frame(FrameType::DownBox);
box2b.set_color(Color::by_index(13));
box2b.set_label_size(36);
box2b.set_align(Align::Clip);
let mut box3a = frame::Frame::new(150, 150, 150, 70, "3a");
box3a.set_frame(FrameType::DownBox);
box3a.set_color(Color::by_index(12));
box3a.set_label_size(36);
box3a.set_align(Align::Clip);
let mut box3b = frame::Frame::new(150, 150 + 70, 150, 80, "3b");
box3b.set_frame(FrameType::DownBox);
box3b.set_color(Color::by_index(13));
box3b.set_label_size(36);
box3b.set_align(Align::Clip);
tile.end();
window.end();
w1.show();
window.show();
app.run().unwrap();
}sourcepub fn inactive(&self) -> Color
pub fn inactive(&self) -> Color
Returns an inactive form of the color
Examples found in repository?
examples/gradients.rs (line 19)
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fn create_vertical_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Vertical");
frame.draw(move |f| {
let imax = f.h();
let d = if imax > 0 { imax } else { 1 };
for i in 0..=imax {
let w = 1.0 - i as f32 / d as f32;
set_draw_color(Color::inactive(&Color::color_average(col1, col2, w)));
draw_xyline(f.x(), f.y() + i, f.x() + f.w());
}
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}
fn create_horizontal_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Horizontal");
frame.draw(move |f| {
let imax = f.w();
let d = if imax > 0 { imax } else { 1 };
for i in 0..=imax {
let w = 1.0 - i as f32 / d as f32;
set_draw_color(Color::inactive(&Color::color_average(col1, col2, w)));
draw_yxline(f.x() + i, f.y(), f.y() + f.h());
}
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}
fn create_horizontal_svg_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Svg");
frame.draw(move |f| {
let (r1, g1, b1) = Color::inactive(&col1).to_rgb();
let (r2, g2, b2) = Color::inactive(&col2).to_rgb();
let svg = format!(
"<svg viewBox='0 0 {} {}'>
<defs>
<linearGradient id='grad1' x1='0%' y1='0%' x2='0%' y2='100%'>
<stop offset='0%' style='stop-color:rgb({},{},{});stop-opacity:1' />
<stop offset='100%' style='stop-color:rgb({},{},{});stop-opacity:1' />
</linearGradient>
</defs>
<rect width='100%' height='100%' fill='url(#grad1)' />
</svg>",
f.w(),
f.h() + 1,
r1,
g1,
b1,
r2,
g2,
b2
);
let mut image = image::SvgImage::from_data(&svg).unwrap();
image.draw(f.x(), f.y(), f.w(), f.h());
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}sourcepub fn gray_ramp(val: i32) -> Color
pub fn gray_ramp(val: i32) -> Color
Returns a gray color value from black (i == 0) to white (i == FL_NUM_GRAY - 1)
sourcepub fn color_average(c1: Color, c2: Color, weight: f32) -> Color
pub fn color_average(c1: Color, c2: Color, weight: f32) -> Color
Returns a gray color value from black (i == 0) to white (i == FL_NUM_GRAY - 1)
Examples found in repository?
examples/gradients.rs (line 19)
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fn create_vertical_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Vertical");
frame.draw(move |f| {
let imax = f.h();
let d = if imax > 0 { imax } else { 1 };
for i in 0..=imax {
let w = 1.0 - i as f32 / d as f32;
set_draw_color(Color::inactive(&Color::color_average(col1, col2, w)));
draw_xyline(f.x(), f.y() + i, f.x() + f.w());
}
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}
fn create_horizontal_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Horizontal");
frame.draw(move |f| {
let imax = f.w();
let d = if imax > 0 { imax } else { 1 };
for i in 0..=imax {
let w = 1.0 - i as f32 / d as f32;
set_draw_color(Color::inactive(&Color::color_average(col1, col2, w)));
draw_yxline(f.x() + i, f.y(), f.y() + f.h());
}
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}
fn create_horizontal_svg_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Svg");
frame.draw(move |f| {
let (r1, g1, b1) = Color::inactive(&col1).to_rgb();
let (r2, g2, b2) = Color::inactive(&col2).to_rgb();
let svg = format!(
"<svg viewBox='0 0 {} {}'>
<defs>
<linearGradient id='grad1' x1='0%' y1='0%' x2='0%' y2='100%'>
<stop offset='0%' style='stop-color:rgb({},{},{});stop-opacity:1' />
<stop offset='100%' style='stop-color:rgb({},{},{});stop-opacity:1' />
</linearGradient>
</defs>
<rect width='100%' height='100%' fill='url(#grad1)' />
</svg>",
f.w(),
f.h() + 1,
r1,
g1,
b1,
r2,
g2,
b2
);
let mut image = image::SvgImage::from_data(&svg).unwrap();
image.draw(f.x(), f.y(), f.w(), f.h());
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}
fn main() {
let a = app::App::default();
let mut win = window::Window::default().with_size(300, 300);
create_vertical_gradient_frame(0, 0, 100, 100, Color::Red, Color::Cyan);
create_horizontal_gradient_frame(100, 0, 100, 100, Color::Red, Color::Cyan);
create_horizontal_svg_gradient_frame(200, 0, 100, 100, Color::Red, Color::Cyan);
win.end();
win.draw(|w| {
// vertical gradient
let imax = w.w();
let d = if imax > 0 { imax } else { 1 };
for i in 0..=imax {
let v = 1.0 - i as f32 / d as f32;
set_draw_color(Color::color_average(Color::Red, Color::Blue, v));
draw_yxline(i, 0, w.h());
}
w.draw_children();
});
win.make_resizable(true);
win.show();
a.run().unwrap();
}sourcepub fn contrast(fg: Color, bg: Color) -> Color
pub fn contrast(fg: Color, bg: Color) -> Color
Returns a color that contrasts with the background color.
sourcepub fn gray_scale(g: u8) -> Color
pub fn gray_scale(g: u8) -> Color
Returns the color closest to the passed grayscale value
sourcepub fn rgb_color(r: u8, g: u8, b: u8) -> Color
pub fn rgb_color(r: u8, g: u8, b: u8) -> Color
Returns the color closest to the passed rgb value
sourcepub fn to_rgb(&self) -> (u8, u8, u8)
pub fn to_rgb(&self) -> (u8, u8, u8)
Get the RGB value of the color
Examples found in repository?
examples/gradients.rs (line 63)
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fn create_horizontal_svg_gradient_frame(
x: i32,
y: i32,
w: i32,
h: i32,
col1: Color,
col2: Color,
) -> frame::Frame {
let mut frame = frame::Frame::new(x, y, w, h, "Svg");
frame.draw(move |f| {
let (r1, g1, b1) = Color::inactive(&col1).to_rgb();
let (r2, g2, b2) = Color::inactive(&col2).to_rgb();
let svg = format!(
"<svg viewBox='0 0 {} {}'>
<defs>
<linearGradient id='grad1' x1='0%' y1='0%' x2='0%' y2='100%'>
<stop offset='0%' style='stop-color:rgb({},{},{});stop-opacity:1' />
<stop offset='100%' style='stop-color:rgb({},{},{});stop-opacity:1' />
</linearGradient>
</defs>
<rect width='100%' height='100%' fill='url(#grad1)' />
</svg>",
f.w(),
f.h() + 1,
r1,
g1,
b1,
r2,
g2,
b2
);
let mut image = image::SvgImage::from_data(&svg).unwrap();
image.draw(f.x(), f.y(), f.w(), f.h());
set_draw_color(Color::Black);
set_font(Font::Helvetica, app::font_size());
draw_text2(&f.label(), f.x(), f.y(), f.w(), f.h(), f.align());
});
frame
}More examples
examples/rounded_images.rs (line 12)
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pub fn new(radius: i32, mut image: image::RgbImage) -> Self {
let mut frame = frame::Frame::new(0, 0, radius * 2, radius * 2, None);
frame.set_frame(enums::FrameType::FlatBox);
frame.draw(move |f| {
image.scale(f.w(), f.h(), false, true);
image.draw(f.x(), f.y(), f.w(), f.h());
let color = f.color().to_rgb();
let s = format!(
"<?xml version='1.0' encoding='UTF-8' standalone='no'?>\n
<svg width='{}' height='{}'>\n
<rect x='{}'
y='{}'
rx='{}'
ry='{}'
width='{}'
height='{}'
fill='none'
stroke='rgb({}, {}, {})'
stroke-width='{}' />\n
</svg>\n",
f.w(),
f.h(),
-f.w() / 2,
-f.w() / 2,
f.w(),
f.w(),
f.w() + f.w(),
f.h() + f.w(),
color.0,
color.1,
color.2,
f.w()
);
let mut s = image::SvgImage::from_data(&s).unwrap();
s.draw(f.x(), f.y(), f.w(), f.h());
});
Self
}examples/format_text.rs (line 296)
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fn main() {
let style = Rc::from(RefCell::from(Style::new()));
let app = App::default().with_scheme(Scheme::Gleam);
let mut wind = Window::default()
.with_size(500, 200)
.with_label("Highlight");
let mut vpack = Pack::new(4, 4, 492, 192, "");
vpack.set_spacing(4);
let mut text_editor = TextEditor::default().with_size(492, 163);
let mut hpack = Pack::new(4, 4, 492, 25, "").with_type(PackType::Horizontal);
hpack.set_spacing(8);
let mut font = Choice::default().with_size(130, 25);
let mut choice = Choice::default().with_size(130, 25);
let mut size = Spinner::default().with_size(60, 25);
let mut color = Choice::default().with_size(100, 25);
let mut btn_clear = Button::default().with_size(40, 25).with_label("X");
hpack.end();
vpack.end();
wind.end();
wind.show();
text_editor.wrap_mode(fltk::text::WrapMode::AtBounds, 0);
text_editor.set_buffer(TextBuffer::default());
font.add_choice("Courier|Helvetica|Times");
font.set_value(0);
font.set_tooltip("Font");
choice.add_choice("Normal|Underline|Strike");
choice.set_value(0);
size.set_value(18.0);
size.set_step(1.0);
size.set_range(12.0, 28.0);
size.set_tooltip("Size");
color.set_tooltip("Color");
color.add_choice("#000000|#ff0000|#00ff00|#0000ff|#ffff00|#00ffff");
color.set_value(0);
btn_clear.set_label_color(Color::Red);
btn_clear.set_tooltip("Clear style");
// set colors
for mut item in color.clone() {
if let Some(lbl) = item.label() {
item.set_label_color(Color::from_u32(
u32::from_str_radix(lbl.trim().strip_prefix('#').unwrap(), 16)
.ok()
.unwrap(),
));
}
}
let style_rc1 = Rc::clone(&style);
text_editor.buffer().unwrap().add_modify_callback({
let mut text_editor1 = text_editor.clone();
let font1 = font.clone();
let size1 = size.clone();
let color1 = color.clone();
let choice1 = choice.clone();
move |pos: i32, ins_items: i32, del_items: i32, _: i32, _: &str| {
let attr = if choice1.value() == 1 {
TextAttr::Underline
} else if choice1.value() == 2 {
TextAttr::StrikeThrough
} else {
TextAttr::None
};
if ins_items > 0 || del_items > 0 {
let mut style = style_rc1.borrow_mut();
let color = Color::from_u32(
u32::from_str_radix(
color1
.text(color1.value())
.unwrap()
.trim()
.strip_prefix('#')
.unwrap(),
16,
)
.ok()
.unwrap(),
);
style.apply_style(
Some(pos),
Some(ins_items),
Some(del_items),
None,
None,
Font::by_name(font1.text(font1.value()).unwrap().trim()),
size1.value() as i32,
color,
attr,
&mut text_editor1,
);
}
}
});
color.set_callback({
let size = size.clone();
let font = font.clone();
let choice = choice.clone();
let mut text_editor = text_editor.clone();
let style_rc1 = Rc::clone(&style);
move |color| {
let attr = match choice.value() {
0 => TextAttr::None,
1 => TextAttr::Underline,
2 => TextAttr::StrikeThrough,
_ => unreachable!(),
};
if let Some(buf) = text_editor.buffer() {
if let Some((s, e)) = buf.selection_position() {
let mut style = style_rc1.borrow_mut();
let color = Color::from_u32(
u32::from_str_radix(
color
.text(color.value())
.unwrap()
.trim()
.strip_prefix('#')
.unwrap(),
16,
)
.ok()
.unwrap(),
);
style.apply_style(
None,
None,
None,
Some(s),
Some(e),
Font::by_name(font.text(font.value()).unwrap().trim()),
size.value() as i32,
color,
attr,
&mut text_editor,
);
}
}
}
});
// get the style from the current cursor position
text_editor.handle({
let style_rc1 = Rc::clone(&style);
let mut font1 = font.clone();
let mut size1 = size.clone();
let mut color1 = color.clone();
move |te, e| match e {
Event::KeyUp | Event::Released => {
if let Some(buff) = te.style_buffer() {
let i = te.insert_position();
if let Some(t) = buff.text_range(i, i + 1) {
if !t.is_empty() {
let style = style_rc1.borrow_mut();
if let Some(i) = t.chars().next().map(|c| (c as usize - 65)) {
if let Some(style) = style.style_table.get(i) {
if let Some(mn) = font1.find_item(&format!("{:?}", style.font))
{
font1.set_item(&mn);
}
size1.set_value(style.size as f64);
let (r, g, b) = style.color.to_rgb();
if let Some(mn) =
color1.find_item(format!("{r:02x}{g:02x}{b:02x}").as_str())
{
color1.set_item(&mn);
}
}
}
}
}
}
true
}
_ => false,
}
});
choice.set_callback({
let mut color1 = color.clone();
move |_| color1.do_callback()
});
font.set_callback({
let mut color1 = color.clone();
move |_| color1.do_callback()
});
size.set_callback({
let mut color1 = color.clone();
move |_| color1.do_callback()
});
// clear style of the current selection or, if no text is selected, clear all text style
btn_clear.set_callback({
let style_rc1 = Rc::clone(&style);
let text_editor1 = text_editor.clone();
move |_| {
match text_editor1.buffer().unwrap().selection_position() {
Some((_, _)) => {
font.set_value(0);
size.set_value(18.0);
color.set_value(0);
choice.set_value(0);
color.do_callback();
}
None => {
font.set_value(0);
size.set_value(18.0);
color.set_value(0);
style_rc1.borrow_mut().apply_style(
None,
None,
None,
Some(0),
Some(text_editor1.buffer().unwrap().length()),
Font::Courier,
16,
Color::Black,
TextAttr::None,
&mut text_editor,
);
}
};
}
});
app.run().unwrap();
}Trait Implementations§
source§impl Ord for Color
impl Ord for Color
source§impl PartialEq for Color
impl PartialEq for Color
source§impl PartialOrd for Color
impl PartialOrd for Color
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self and other) and is used by the <=
operator. Read moreimpl Copy for Color
impl Eq for Color
impl StructuralPartialEq for Color
Auto Trait Implementations§
impl Freeze for Color
impl RefUnwindSafe for Color
impl Send for Color
impl Sync for Color
impl Unpin for Color
impl UnwindSafe for Color
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more