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|
use iced::alignment::{self, Alignment};
use iced::mouse;
use iced::widget::{
canvas, checkbox, column, horizontal_space, row, slider, text,
};
use iced::{Element, Length, Point, Rectangle, Renderer, Theme, Vector};
pub fn main() -> iced::Result {
iced::program(
"Vectorial Text - Iced",
VectorialText::update,
VectorialText::view,
)
.theme(|_| Theme::Dark)
.antialiasing(true)
.run()
}
#[derive(Default)]
struct VectorialText {
state: State,
}
#[derive(Debug, Clone, Copy)]
enum Message {
SizeChanged(f32),
AngleChanged(f32),
ScaleChanged(f32),
ToggleJapanese(bool),
}
impl VectorialText {
fn update(&mut self, message: Message) {
match message {
Message::SizeChanged(size) => {
self.state.size = size;
}
Message::AngleChanged(angle) => {
self.state.angle = angle;
}
Message::ScaleChanged(scale) => {
self.state.scale = scale;
}
Message::ToggleJapanese(use_japanese) => {
self.state.use_japanese = use_japanese;
}
}
self.state.cache.clear();
}
fn view(&self) -> Element<Message> {
let slider_with_label = |label, range, value, message: fn(f32) -> _| {
column![
row![text(label), horizontal_space(), text!("{:.2}", value)],
slider(range, value, message).step(0.01)
]
.spacing(2)
};
column![
canvas(&self.state).width(Length::Fill).height(Length::Fill),
column![
checkbox("Use Japanese", self.state.use_japanese,)
.on_toggle(Message::ToggleJapanese),
row![
slider_with_label(
"Size",
2.0..=80.0,
self.state.size,
Message::SizeChanged,
),
slider_with_label(
"Angle",
0.0..=360.0,
self.state.angle,
Message::AngleChanged,
),
slider_with_label(
"Scale",
1.0..=20.0,
self.state.scale,
Message::ScaleChanged,
),
]
.spacing(20),
]
.align_items(Alignment::Center)
.spacing(10)
]
.spacing(10)
.padding(20)
.into()
}
}
struct State {
size: f32,
angle: f32,
scale: f32,
use_japanese: bool,
cache: canvas::Cache,
}
impl State {
pub fn new() -> Self {
Self {
size: 40.0,
angle: 0.0,
scale: 1.0,
use_japanese: false,
cache: canvas::Cache::new(),
}
}
}
impl<Message> canvas::Program<Message> for State {
type State = ();
fn draw(
&self,
_state: &Self::State,
renderer: &Renderer,
theme: &Theme,
bounds: Rectangle,
_cursor: mouse::Cursor,
) -> Vec<canvas::Geometry> {
let geometry = self.cache.draw(renderer, bounds.size(), |frame| {
let palette = theme.palette();
let center = bounds.center();
frame.translate(Vector::new(center.x, center.y));
frame.scale(self.scale);
frame.rotate(self.angle * std::f32::consts::PI / 180.0);
frame.fill_text(canvas::Text {
position: Point::new(0.0, 0.0),
color: palette.text,
size: self.size.into(),
content: String::from(if self.use_japanese {
"ベクトルテキスト🎉"
} else {
"Vectorial Text! 🎉"
}),
horizontal_alignment: alignment::Horizontal::Center,
vertical_alignment: alignment::Vertical::Center,
shaping: text::Shaping::Advanced,
..canvas::Text::default()
});
});
vec![geometry]
}
}
impl Default for State {
fn default() -> Self {
State::new()
}
}
|
