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Improve tour example

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This commit is contained in:
Héctor Ramón Jiménez 2019-09-04 11:09:57 +02:00
parent 2c35103035
commit c583a2174d
24 changed files with 644 additions and 239 deletions
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21
examples/ggez/main.rs
View file

@ -16,8 +16,8 @@ pub fn main() -> ggez::GameResult {
let (context, event_loop) = {
&mut ggez::ContextBuilder::new("iced", "ggez")
.window_mode(ggez::conf::WindowMode {
width: 1280.0,
height: 1024.0,
width: 850.0,
height: 850.0,
..ggez::conf::WindowMode::default()
})
.build()?
@ -39,6 +39,7 @@ pub fn main() -> ggez::GameResult {
struct Game {
spritesheet: graphics::Image,
font: graphics::Font,
tour: Tour,
events: Vec<iced::Event>,
@ -51,7 +52,8 @@ impl Game {
Ok(Game {
spritesheet: graphics::Image::new(context, "/ui.png").unwrap(),
tour: Tour::new(),
font: graphics::Font::new(context, "/Roboto-Regular.ttf").unwrap(),
tour: Tour::new(context),
events: Vec::new(),
cache: Some(iced::Cache::default()),
@ -126,7 +128,7 @@ impl event::EventHandler for Game {
}
fn draw(&mut self, context: &mut ggez::Context) -> ggez::GameResult {
graphics::clear(context, [0.3, 0.3, 0.6, 1.0].into());
graphics::clear(context, graphics::WHITE);
let screen = graphics::screen_coordinates(context);
@ -134,14 +136,17 @@ impl event::EventHandler for Game {
let layout = self.tour.layout();
let content = Column::new()
.width(screen.w as u32)
.height(screen.h as u32)
.width(screen.w as u16)
.height(screen.h as u16)
.align_items(iced::Align::Center)
.justify_content(iced::Justify::Center)
.push(layout);
let renderer =
&mut Renderer::new(context, self.spritesheet.clone());
let renderer = &mut Renderer::new(
context,
self.spritesheet.clone(),
self.font,
);
let mut ui = iced::UserInterface::build(
content,

26
examples/ggez/renderer.rs
View file

@ -1,24 +1,38 @@
mod button;
mod checkbox;
mod debugger;
mod image;
mod radio;
mod slider;
mod text;
use ggez::graphics::{self, spritebatch::SpriteBatch, Image};
use ggez::graphics::{
self, spritebatch::SpriteBatch, Font, Image, MeshBuilder,
};
use ggez::Context;
pub struct Renderer<'a> {
pub context: &'a mut Context,
pub sprites: SpriteBatch,
pub spritesheet: Image,
pub font: Font,
font_size: f32,
debug_mesh: Option<MeshBuilder>,
}
impl Renderer<'_> {
pub fn new(context: &mut Context, spritesheet: Image) -> Renderer {
pub fn new(
context: &mut Context,
spritesheet: Image,
font: Font,
) -> Renderer {
Renderer {
context,
sprites: SpriteBatch::new(spritesheet.clone()),
spritesheet,
font,
font_size: 20.0,
debug_mesh: None,
}
}
@ -37,5 +51,13 @@ impl Renderer<'_> {
graphics::FilterMode::Linear,
)
.expect("Draw text");
if let Some(debug_mesh) = self.debug_mesh.take() {
let mesh =
debug_mesh.build(self.context).expect("Build debug mesh");
graphics::draw(self.context, &mesh, graphics::DrawParam::default())
.expect("Draw debug mesh");
}
}
}

1
examples/ggez/renderer/button.rs
View file

@ -104,6 +104,7 @@ impl button::Renderer for Renderer<'_> {
let mut text = Text::new(TextFragment {
text: String::from(label),
font: Some(self.font),
scale: Some(Scale { x: 20.0, y: 20.0 }),
..Default::default()
});

30
examples/ggez/renderer/debugger.rs Normal file
View file

@ -0,0 +1,30 @@
use super::Renderer;
use ggez::graphics::{Color, DrawMode, MeshBuilder, Rect};
impl iced::renderer::Debugger for Renderer<'_> {
type Color = Color;
fn explain(&mut self, layout: &iced::Layout<'_>, color: Color) {
let bounds = layout.bounds();
let mut debug_mesh =
self.debug_mesh.take().unwrap_or(MeshBuilder::new());
debug_mesh.rectangle(
DrawMode::stroke(1.0),
Rect {
x: bounds.x,
y: bounds.y,
w: bounds.width,
h: bounds.height,
},
color,
);
self.debug_mesh = Some(debug_mesh);
for child in layout.children() {
self.explain(&child, color);
}
}
}

51
examples/ggez/renderer/image.rs Normal file
View file

@ -0,0 +1,51 @@
use super::Renderer;
use ggez::{graphics, nalgebra};
use iced::image;
impl image::Renderer<graphics::Image> for Renderer<'_> {
fn node(
&self,
style: iced::Style,
image: &graphics::Image,
width: Option<u16>,
height: Option<u16>,
_source: Option<iced::Rectangle<u16>>,
) -> iced::Node {
let aspect_ratio = image.width() as f32 / image.height() as f32;
let style = match (width, height) {
(Some(width), Some(height)) => style.width(width).height(height),
(Some(width), None) => style
.width(width)
.height((width as f32 / aspect_ratio).round() as u16),
(None, Some(height)) => style
.height(height)
.width((height as f32 * aspect_ratio).round() as u16),
(None, None) => style.width(image.width()).height(image.height()),
};
iced::Node::new(style)
}
fn draw(
&mut self,
image: &graphics::Image,
bounds: iced::Rectangle,
_source: Option<iced::Rectangle<u16>>,
) {
// We should probably use batches to draw images efficiently and keep
// draw side-effect free, but this is good enough for the example.
graphics::draw(
self.context,
image,
graphics::DrawParam::new()
.dest(nalgebra::Point2::new(bounds.x, bounds.y))
.scale(nalgebra::Vector2::new(
bounds.width / image.width() as f32,
bounds.height / image.height() as f32,
)),
)
.expect("Draw image");
}
}

17
examples/ggez/renderer/text.rs
View file

@ -6,7 +6,13 @@ use std::cell::RefCell;
use std::f32;
impl text::Renderer<Color> for Renderer<'_> {
fn node(&self, style: iced::Style, content: &str, size: f32) -> iced::Node {
fn node(
&self,
style: iced::Style,
content: &str,
size: Option<u16>,
) -> iced::Node {
let font = self.font;
let font_cache = graphics::font_cache(self.context);
let content = String::from(content);
@ -17,6 +23,7 @@ impl text::Renderer<Color> for Renderer<'_> {
// I noticed that the first measure is the one that matters in
// practice. Here, we use a RefCell to store the cached measurement.
let measure = RefCell::new(None);
let size = size.map(f32::from).unwrap_or(self.font_size);
iced::Node::with_measure(style, move |bounds| {
let mut measure = measure.borrow_mut();
@ -35,6 +42,7 @@ impl text::Renderer<Color> for Renderer<'_> {
let mut text = Text::new(TextFragment {
text: content.clone(),
font: Some(font),
scale: Some(Scale { x: size, y: size }),
..Default::default()
});
@ -71,13 +79,16 @@ impl text::Renderer<Color> for Renderer<'_> {
&mut self,
bounds: iced::Rectangle,
content: &str,
size: f32,
size: Option<u16>,
color: Option<Color>,
horizontal_alignment: text::HorizontalAlignment,
_vertical_alignment: text::VerticalAlignment,
) {
let size = size.map(f32::from).unwrap_or(self.font_size);
let mut text = Text::new(TextFragment {
text: String::from(content),
font: Some(self.font),
scale: Some(Scale { x: size, y: size }),
..Default::default()
});
@ -101,7 +112,7 @@ impl text::Renderer<Color> for Renderer<'_> {
x: bounds.x,
y: bounds.y,
},
color,
color.or(Some(graphics::BLACK)),
);
}
}

389
examples/ggez/tour.rs
View file

@ -1,22 +1,26 @@
use super::widget::{
button, slider, Button, Checkbox, Column, Element, Radio, Row, Slider, Text,
button, slider, Button, Checkbox, Column, Element, Image, Radio, Row,
Slider, Text,
};
use ggez::graphics::{Color, BLACK};
use ggez::graphics::{self, Color, FilterMode, BLACK};
use ggez::Context;
use iced::{text::HorizontalAlignment, Align};
pub struct Tour {
steps: Steps,
back_button: button::State,
next_button: button::State,
debug: bool,
}
impl Tour {
pub fn new() -> Tour {
pub fn new(context: &mut Context) -> Tour {
Tour {
steps: Steps::new(),
steps: Steps::new(context),
back_button: button::State::new(),
next_button: button::State::new(),
debug: false,
}
}
@ -29,7 +33,7 @@ impl Tour {
self.steps.advance();
}
Message::StepMessage(step_msg) => {
self.steps.update(step_msg);
self.steps.update(step_msg, &mut self.debug);
}
}
}
@ -39,6 +43,7 @@ impl Tour {
steps,
back_button,
next_button,
..
} = self;
let mut controls = Row::new();
@ -59,12 +64,18 @@ impl Tour {
);
}
Column::new()
let element: Element<_> = Column::new()
.max_width(500)
.spacing(20)
.push(steps.layout().map(Message::StepMessage))
.push(steps.layout(self.debug).map(Message::StepMessage))
.push(controls)
.into()
.into();
if self.debug {
element.explain(BLACK)
} else {
element
}
}
}
@ -81,44 +92,52 @@ struct Steps {
}
impl Steps {
fn new() -> Steps {
fn new(context: &mut Context) -> Steps {
Steps {
steps: vec![
Step::Welcome,
Step::Buttons {
primary: button::State::new(),
secondary: button::State::new(),
positive: button::State::new(),
},
Step::Checkbox { is_checked: false },
Step::Radio { selection: None },
Step::Slider {
state: slider::State::new(),
value: 50,
},
Step::RowsAndColumns {
layout: Layout::Row,
spacing_slider: slider::State::new(),
spacing: 20,
},
Step::Text {
size_slider: slider::State::new(),
size: 30,
color_sliders: [slider::State::new(); 3],
color: BLACK,
},
Step::RowsAndColumns {
layout: Layout::Row,
spacing_slider: slider::State::new(),
spacing: 20,
Step::Radio { selection: None },
Step::Image {
ferris: {
let mut image =
graphics::Image::new(context, "/ferris.png")
.expect("Load ferris image");
image.set_filter(FilterMode::Linear);
image
},
width: 300,
slider: slider::State::new(),
},
Step::Debugger,
Step::End,
],
current: 0,
}
}
fn update(&mut self, msg: StepMessage) {
self.steps[self.current].update(msg);
fn update(&mut self, msg: StepMessage, debug: &mut bool) {
self.steps[self.current].update(msg, debug);
}
fn layout(&mut self) -> Element<StepMessage> {
self.steps[self.current].layout()
fn layout(&mut self, debug: bool) -> Element<StepMessage> {
self.steps[self.current].layout(debug)
}
fn advance(&mut self) {
@ -145,52 +164,51 @@ impl Steps {
enum Step {
Welcome,
Buttons {
primary: button::State,
secondary: button::State,
positive: button::State,
},
Checkbox {
is_checked: bool,
},
Radio {
selection: Option<Language>,
},
Slider {
state: slider::State,
value: u16,
},
RowsAndColumns {
layout: Layout,
spacing_slider: slider::State,
spacing: u16,
},
Text {
size_slider: slider::State,
size: u16,
color_sliders: [slider::State; 3],
color: Color,
},
RowsAndColumns {
layout: Layout,
spacing_slider: slider::State,
spacing: u16,
Radio {
selection: Option<Language>,
},
Image {
ferris: graphics::Image,
width: u16,
slider: slider::State,
},
Debugger,
End,
}
#[derive(Debug, Clone, Copy)]
pub enum StepMessage {
CheckboxToggled(bool),
LanguageSelected(Language),
SliderChanged(f32),
TextSizeChanged(f32),
TextColorChanged(Color),
LayoutChanged(Layout),
SpacingChanged(f32),
TextSizeChanged(f32),
TextColorChanged(Color),
LanguageSelected(Language),
ImageWidthChanged(f32),
DebugToggled(bool),
}
impl<'a> Step {
fn update(&mut self, msg: StepMessage) {
fn update(&mut self, msg: StepMessage, debug: &mut bool) {
match msg {
StepMessage::CheckboxToggled(value) => {
if let Step::Checkbox { is_checked } = self {
*is_checked = value;
StepMessage::DebugToggled(value) => {
if let Step::Debugger = self {
*debug = value;
}
}
StepMessage::LanguageSelected(language) => {
@ -223,31 +241,30 @@ impl<'a> Step {
*spacing = new_spacing.round() as u16;
}
}
StepMessage::ImageWidthChanged(new_width) => {
if let Step::Image { width, .. } = self {
*width = new_width.round() as u16;
}
}
};
}
fn can_continue(&self) -> bool {
match self {
Step::Welcome => true,
Step::Buttons { .. } => true,
Step::Checkbox { is_checked } => *is_checked,
Step::Radio { selection } => *selection == Some(Language::Rust),
Step::Slider { .. } => true,
Step::Text { .. } => true,
Step::Image { .. } => true,
Step::RowsAndColumns { .. } => true,
Step::Debugger => true,
Step::End => false,
}
}
fn layout(&mut self) -> Element<StepMessage> {
fn layout(&mut self, debug: bool) -> Element<StepMessage> {
match self {
Step::Welcome => Self::welcome().into(),
Step::Buttons {
primary,
secondary,
positive,
} => Self::buttons(primary, secondary, positive).into(),
Step::Checkbox { is_checked } => Self::checkbox(*is_checked).into(),
Step::Radio { selection } => Self::radio(*selection).into(),
Step::Slider { state, value } => Self::slider(state, *value).into(),
Step::Text {
@ -256,6 +273,11 @@ impl<'a> Step {
color_sliders,
color,
} => Self::text(size_slider, *size, color_sliders, *color).into(),
Step::Image {
ferris,
width,
slider,
} => Self::image(ferris.clone(), *width, slider).into(),
Step::RowsAndColumns {
layout,
spacing_slider,
@ -263,6 +285,7 @@ impl<'a> Step {
} => {
Self::rows_and_columns(*layout, spacing_slider, *spacing).into()
}
Step::Debugger => Self::debugger(debug).into(),
Step::End => Self::end().into(),
}
}
@ -277,8 +300,21 @@ impl<'a> Step {
fn welcome() -> Column<'a, StepMessage> {
Self::container("Welcome!")
.push(Text::new(
"This is a tour that introduces some of the features and \
concepts related with UI development in Iced.",
"This a simple tour meant to showcase a bunch of widgets that \
can be easily implemented on top of Iced.",
))
.push(Text::new(
"Iced is a renderer-agnostic GUI library for Rust focused on \
simplicity and type-safety. It is heavily inspired by Elm.",
))
.push(Text::new(
"It was originally born as part of Coffee, an opinionated \
2D game engine for Rust.",
))
.push(Text::new(
"Iced does not provide a built-in renderer. This example runs \
on a fairly simple renderer built on top of ggez, another \
game library.",
))
.push(Text::new(
"You will need to interact with the UI in order to reach the \
@ -286,73 +322,6 @@ impl<'a> Step {
))
}
fn buttons(
primary: &'a mut button::State,
secondary: &'a mut button::State,
positive: &'a mut button::State,
) -> Column<'a, StepMessage> {
Self::container("Button")
.push(Text::new("A button can fire actions when clicked."))
.push(Text::new(
"As of now, there are 3 different types of buttons: \
primary, secondary, and positive.",
))
.push(Button::new(primary, "Primary"))
.push(
Button::new(secondary, "Secondary")
.class(button::Class::Secondary),
)
.push(
Button::new(positive, "Positive")
.class(button::Class::Positive),
)
.push(Text::new(
"Additional types will be added in the near future! Choose \
each type smartly depending on the situation.",
))
}
fn checkbox(is_checked: bool) -> Column<'a, StepMessage> {
Self::container("Checkbox")
.push(Text::new(
"A box that can be checked. Useful to build toggle controls.",
))
.push(Checkbox::new(
is_checked,
"Show \"Next\" button",
StepMessage::CheckboxToggled,
))
.push(Text::new(
"A checkbox always has a label, and both the checkbox and its \
label can be clicked to toggle it.",
))
}
fn radio(selection: Option<Language>) -> Column<'a, StepMessage> {
let question = Column::new()
.padding(20)
.spacing(10)
.push(Text::new("Iced is written in..."))
.push(Language::all().iter().cloned().fold(
Column::new().padding(10).spacing(20),
|choices, language| {
choices.push(Radio::new(
language,
language.into(),
selection,
StepMessage::LanguageSelected,
))
},
));
Self::container("Radio button")
.push(Text::new(
"A radio button is normally used to represent a choice. Like \
a checkbox, it always has a label.",
))
.push(question)
}
fn slider(
state: &'a mut slider::State,
value: u16,
@ -378,55 +347,6 @@ impl<'a> Step {
)
}
fn text(
size_slider: &'a mut slider::State,
size: u16,
color_sliders: &'a mut [slider::State; 3],
color: Color,
) -> Column<'a, StepMessage> {
let size_section = Column::new()
.padding(20)
.spacing(20)
.push(Text::new("You can change its size:"))
.push(
Text::new(&format!("This text is {} points", size)).size(size),
)
.push(Slider::new(
size_slider,
10.0..=50.0,
size as f32,
StepMessage::TextSizeChanged,
));
let [red, green, blue] = color_sliders;
let color_section = Column::new()
.padding(20)
.spacing(20)
.push(Text::new("And its color:"))
.push(Text::new(&format!("{:?}", color)).color(color))
.push(
Row::new()
.spacing(10)
.push(Slider::new(red, 0.0..=1.0, color.r, move |r| {
StepMessage::TextColorChanged(Color { r, ..color })
}))
.push(Slider::new(green, 0.0..=1.0, color.g, move |g| {
StepMessage::TextColorChanged(Color { g, ..color })
}))
.push(Slider::new(blue, 0.0..=1.0, color.b, move |b| {
StepMessage::TextColorChanged(Color { b, ..color })
})),
);
Self::container("Text")
.push(Text::new(
"Text is probably the most essential widget for your UI. \
It will try to adapt to the dimensions of its container.",
))
.push(size_section)
.push(color_section)
}
fn rows_and_columns(
layout: Layout,
spacing_slider: &'a mut slider::State,
@ -463,7 +383,7 @@ impl<'a> Step {
.spacing(10)
.push(Slider::new(
spacing_slider,
0.0..=100.0,
0.0..=80.0,
spacing as f32,
StepMessage::SpacingChanged,
))
@ -489,10 +409,127 @@ impl<'a> Step {
.push(spacing_section)
}
fn text(
size_slider: &'a mut slider::State,
size: u16,
color_sliders: &'a mut [slider::State; 3],
color: Color,
) -> Column<'a, StepMessage> {
let size_section = Column::new()
.padding(20)
.spacing(20)
.push(Text::new("You can change its size:"))
.push(
Text::new(&format!("This text is {} pixels", size)).size(size),
)
.push(Slider::new(
size_slider,
10.0..=70.0,
size as f32,
StepMessage::TextSizeChanged,
));
let [red, green, blue] = color_sliders;
let color_section = Column::new()
.padding(20)
.spacing(20)
.push(Text::new("And its color:"))
.push(Text::new(&format!("{:?}", color)).color(color))
.push(
Row::new()
.spacing(10)
.push(Slider::new(red, 0.0..=1.0, color.r, move |r| {
StepMessage::TextColorChanged(Color { r, ..color })
}))
.push(Slider::new(green, 0.0..=1.0, color.g, move |g| {
StepMessage::TextColorChanged(Color { g, ..color })
}))
.push(Slider::new(blue, 0.0..=1.0, color.b, move |b| {
StepMessage::TextColorChanged(Color { b, ..color })
})),
);
Self::container("Text")
.push(Text::new(
"Text is probably the most essential widget for your UI. \
It will try to adapt to the dimensions of its container.",
))
.push(size_section)
.push(color_section)
}
fn radio(selection: Option<Language>) -> Column<'a, StepMessage> {
let question = Column::new()
.padding(20)
.spacing(10)
.push(Text::new("Iced is written in...").size(24))
.push(Language::all().iter().cloned().fold(
Column::new().padding(10).spacing(20),
|choices, language| {
choices.push(Radio::new(
language,
language.into(),
selection,
StepMessage::LanguageSelected,
))
},
));
Self::container("Radio button")
.push(Text::new(
"A radio button is normally used to represent a choice... \
Surprise test!",
))
.push(question)
.push(Text::new(
"Iced works very well with iterators! The list above is \
basically created by folding a column over the different \
choices, creating a radio button for each one of them!",
))
}
fn image(
ferris: graphics::Image,
width: u16,
slider: &'a mut slider::State,
) -> Column<'a, StepMessage> {
Self::container("Image")
.push(Text::new("An image that tries to keep its aspect ratio."))
.push(Image::new(ferris).width(width).align_self(Align::Center))
.push(Slider::new(
slider,
100.0..=500.0,
width as f32,
StepMessage::ImageWidthChanged,
))
.push(
Text::new(&format!("Width: {} px", width.to_string()))
.horizontal_alignment(HorizontalAlignment::Center),
)
}
fn debugger(debug: bool) -> Column<'a, StepMessage> {
Self::container("Debugger")
.push(Text::new(
"You can ask Iced to visually explain the layouting of the \
different elements comprising your UI!",
))
.push(Text::new(
"Give it a shot! Check the following checkbox to be able to \
see element boundaries.",
))
.push(Checkbox::new(
debug,
"Explain layout",
StepMessage::DebugToggled,
))
.push(Text::new("Feel free to go back and take a look."))
}
fn end() -> Column<'a, StepMessage> {
Self::container("You reached the end!")
.push(Text::new(
"This tour will be extended as more features are added.",
"This tour will be updated as more features are added.",
))
.push(Text::new("Make sure to keep an eye on it!"))
}

3
examples/ggez/widget.rs
View file

@ -1,12 +1,13 @@
use super::Renderer;
use ggez::graphics::Color;
use ggez::graphics::{self, Color};
pub use iced::{button, slider, Button, Slider};
pub type Text = iced::Text<Color>;
pub type Checkbox<Message> = iced::Checkbox<Color, Message>;
pub type Radio<Message> = iced::Radio<Color, Message>;
pub type Image = iced::Image<graphics::Image>;
pub type Column<'a, Message> = iced::Column<'a, Message, Renderer<'a>>;
pub type Row<'a, Message> = iced::Row<'a, Message, Renderer<'a>>;

202
examples/resources/Roboto-LICENSE Normal file
View file

@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
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