Function fltk::draw::set_font

source · 
pub fn set_font(face: Font, fsize: i32)
Expand description

Sets the current font, which is then used in various drawing routines

Examples found in repository?
examples/gradients.rs (line 23)
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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
}
More examples
Hide additional examples
examples/table.rs (line 27)
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fn main() {
    let app = app::App::default().with_scheme(app::Scheme::Gtk);
    let mut wind = window::Window::default().with_size(800, 600);
    let mut table = table::Table::default()
        .with_size(800 - 10, 600 - 10)
        .center_of(&wind);

    table.set_rows(30);
    table.set_row_header(true);
    table.set_row_resize(true);
    table.set_cols(26);
    table.set_col_header(true);
    table.set_col_width_all(80);
    table.set_col_resize(true);
    table.end();

    wind.make_resizable(true);
    wind.end();
    wind.show();

    // Called when the table is drawn then when it's redrawn due to events
    table.draw_cell(move |t, ctx, row, col, x, y, w, h| match ctx {
        table::TableContext::StartPage => draw::set_font(enums::Font::Helvetica, 14),
        table::TableContext::ColHeader => {
            draw_header(&format!("{}", (col + 65) as u8 as char), x, y, w, h)
        } // Column titles
        table::TableContext::RowHeader => draw_header(&format!("{}", row + 1), x, y, w, h), // Row titles
        table::TableContext::Cell => draw_data(
            &format!("{}", row + col),
            x,
            y,
            w,
            h,
            t.is_selected(row, col),
        ), // Data in cells
        _ => (),
    });

    app.run().unwrap();
}

fn draw_header(txt: &str, x: i32, y: i32, w: i32, h: i32) {
    draw::push_clip(x, y, w, h);
    draw::draw_box(
        enums::FrameType::ThinUpBox,
        x,
        y,
        w,
        h,
        enums::Color::FrameDefault,
    );
    draw::set_draw_color(enums::Color::Black);
    draw::set_font(enums::Font::Helvetica, 14);
    draw::draw_text2(txt, x, y, w, h, enums::Align::Center);
    draw::pop_clip();
}

// The selected flag sets the color of the cell to a grayish color, otherwise white
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/spreadsheet.rs (line 63)
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    pub fn new(mut inp: input::Input) -> Self {
        let mut table = table::Table::default()
            .with_size(800 - 10, 600 - 10)
            .center_of_parent();
        let data = Rc::from(RefCell::from(vec![vec![String::from(""); 26]; 28]));
        let cell = Rc::from(RefCell::from(CellData::default()));

        table.set_rows(28);
        table.set_row_header(true);
        table.set_row_resize(true);
        table.set_cols(26);
        table.set_col_header(true);
        table.set_col_width_all(80);
        table.set_col_resize(true);
        table.end();

        let cell_c = cell.clone();
        let data_c = data.clone();

        // Called when the table is drawn then when it's redrawn due to events
        table.draw_cell(move |t, ctx, row, col, x, y, w, h| match ctx {
            table::TableContext::StartPage => draw::set_font(enums::Font::Helvetica, 14),
            table::TableContext::ColHeader => {
                Self::draw_header(&format!("{}", (col + 65) as u8 as char), x, y, w, h)
            } // Column titles
            table::TableContext::RowHeader => {
                Self::draw_header(&format!("{}", row + 1), x, y, w, h)
            } // Row titles
            table::TableContext::Cell => {
                if t.is_selected(row, col) {
                    cell_c.borrow_mut().select(row, col, x, y, w, h); // Captures the cell information
                }
                Self::draw_data(
                    &data_c.borrow()[row as usize][col as usize].to_string(),
                    x,
                    y,
                    w,
                    h,
                    t.is_selected(row, col),
                );
            }
            _ => (),
        });

        let cell_c = cell.clone();
        let data_c = data.clone();

        table.handle(move |_, ev| match ev {
            // Event::Push will happen before the focus is moved,
            // thus giving the previous coordinates.
            // Event::Released gives an accurate position
            enums::Event::Released => {
                let c = cell_c.borrow();
                inp.resize(c.x, c.y, c.w, c.h);
                inp.set_value(&data_c.borrow_mut()[c.row as usize][c.col as usize]);
                inp.show();
                inp.take_focus().ok();
                inp.redraw();
                true
            }
            _ => false,
        });

        Self { table, data, cell }
    }

    pub fn redraw(&mut self) {
        self.table.redraw()
    }

    fn draw_header(txt: &str, x: i32, y: i32, w: i32, h: i32) {
        draw::push_clip(x, y, w, h);
        draw::draw_box(
            enums::FrameType::ThinUpBox,
            x,
            y,
            w,
            h,
            enums::Color::FrameDefault,
        );
        draw::set_draw_color(enums::Color::Black);
        draw::set_font(enums::Font::Helvetica, 14);
        draw::draw_text2(txt, x, y, w, h, enums::Align::Center);
        draw::pop_clip();
    }

    // The selected flag sets the color of the cell to a grayish color, otherwise white
    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();
    }