Struct fltk::enums::Color

source · 
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§

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impl Color

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pub const ForeGround: Color = _

ForeGround, label colors

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pub const Foreground: Color = _

Foreground, label colors

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pub const BackGround2: Color = _

BackGround2, Is the color inside input, output and text display widgets

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pub const Background2: Color = _

Background2, Is the color inside input, output and text display widgets

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pub const Inactive: Color = _

Inactive

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pub const Selection: Color = _

Selection

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pub const Free: Color = _

Free

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pub const Gray0: Color = _

Gray0

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pub const GrayRamp: Color = _

GrayRamp

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pub const Dark3: Color = _

Dark3

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pub const Dark2: Color = _

Dark2

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pub const Dark1: Color = _

Dark1

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pub const FrameDefault: Color = _

FrameDefault

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pub const BackGround: Color = _

BackGround

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pub const Background: Color = _

Background

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pub const Light1: Color = _

Light1

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pub const Light2: Color = _

Light2

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pub const Light3: Color = _

Light3

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pub const Black: Color = _

Black

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pub const Red: Color = _

Red

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pub const Green: Color = _

Green

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pub const Yellow: Color = _

Yellow

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pub const Blue: Color = _

Blue

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pub const Magenta: Color = _

Magenta

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pub const Cyan: Color = _

Cyan

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pub const DarkRed: Color = _

DarkRed

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pub const DarkGreen: Color = _

DarkGreen

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pub const DarkYellow: Color = _

DarkYellow

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pub const DarkBlue: Color = _

DarkBlue

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pub const DarkMagenta: Color = _

DarkMagenta

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pub const DarkCyan: Color = _

DarkCyan

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pub const White: Color = _

White

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pub const fn bits(&self) -> u32

Gets the inner color representation

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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(&reg, 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
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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();
}
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pub const fn from_rgba(r: u8, g: u8, b: u8, a: u8) -> Color

Available on crate feature enable-glwindow only.

Returns a color from RGB

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pub const fn from_rgbi(val: u32) -> Color

Get a color from an RGBI value, the I stands for the Fltk colormap index.

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pub fn from_rgba_tuple(tup: (u8, u8, u8, u8)) -> Color

Create color from RGBA using alpha compositing. Works for non-group types.

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pub const fn from_u32(val: u32) -> Color

Returns a color from hex or decimal

Examples found in repository?
examples/frames.rs (line 14)
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    pub fn new(idx: usize) -> MyFrame {
        let mut f = frame::Frame::default();
        // Normally you would use the FrameType enum, for example:
        // some_widget.set_frame(FrameType::DownBox);
        f.set_frame(enums::FrameType::by_index(idx));
        f.set_color(enums::Color::from_u32(0x7FFFD4));
        let f_name = format!("{:?}", f.frame());
        f.set_label(&f_name);
        f.set_label_size(12);
        Self { f }
    }
More examples
Hide additional 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 52)
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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:
source

pub const fn from_hex(val: u32) -> Color

Returns a color from hex or decimal

Examples found in repository?
examples/counter3.rs (line 7)
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const BLUE: Color = Color::from_hex(0x42A5F5);
const SEL_BLUE: Color = Color::from_hex(0x3f51b5);
const GRAY: Color = Color::from_hex(0x757575);
More examples
Hide additional examples
examples/calculator2.rs (line 45)
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    pub fn new(title: &'static str) -> MyButton {
        let mut b = MyButton {
            btn: 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,
                });
            }
        }
        b
    }
}

impl Deref for MyButton {
    type Target = Button;

    fn deref(&self) -> &Self::Target {
        &self.btn
    }
}

impl DerefMut for MyButton {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.btn
    }
}

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());
                    }
                    _ => (),
                },
            }
        }
    }
}
source

pub fn from_hex_str(col: &str) -> Result<Color, FltkError>

Return a Color from a hex color format (#xxxxxx)

source

pub fn to_hex_str(&self) -> String

Returns the color in hex string format

source

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();
}
source

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
}
source

pub fn darker(&self) -> Color

Returns an darker form of the color

source

pub fn lighter(&self) -> Color

Returns an lighter form of the color

source

pub fn gray_ramp(val: i32) -> Color

Returns a gray color value from black (i == 0) to white (i == FL_NUM_GRAY - 1)

source

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();
}
source

pub fn contrast(fg: Color, bg: Color) -> Color

Returns a color that contrasts with the background color.

source

pub fn gray_scale(g: u8) -> Color

Returns the color closest to the passed grayscale value

source

pub fn rgb_color(r: u8, g: u8, b: u8) -> Color

Returns the color closest to the passed rgb value

source

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
Hide additional 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();
}
source

pub fn to_rgba(&self) -> (u8, u8, u8, u8)

Available on crate feature enable-glwindow only.

Get the RGBA value of the color

Trait Implementations§

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impl Clone for Color

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fn clone(&self) -> Color

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Color

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Display for Color

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Hash for Color

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Color

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fn cmp(&self, other: &Color) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Color

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fn eq(&self, other: &Color) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Color

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fn partial_cmp(&self, other: &Color) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

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 more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Copy for Color

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impl Eq for Color

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impl StructuralEq for Color

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impl StructuralPartialEq for Color

Auto Trait Implementations§

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impl RefUnwindSafe for Color

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impl Send for Color

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impl Sync for Color

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impl Unpin for Color

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impl UnwindSafe for Color

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.