From 0d620b7701f427ed0091f3640ab9ca0e116eb412 Mon Sep 17 00:00:00 2001 From: Artur Sapek Date: Wed, 1 Jan 2020 15:44:32 -0700 Subject: Implement Geometry2D primitive --- examples/geometry.rs | 227 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 227 insertions(+) create mode 100644 examples/geometry.rs (limited to 'examples/geometry.rs') diff --git a/examples/geometry.rs b/examples/geometry.rs new file mode 100644 index 00000000..feb7684e --- /dev/null +++ b/examples/geometry.rs @@ -0,0 +1,227 @@ +//! This example showcases a simple native custom widget that renders using +//! arbitrary low-level geometry. +mod rainbow { + // For now, to implement a custom native widget you will need to add + // `iced_native` and `iced_wgpu` to your dependencies. + // + // Then, you simply need to define your widget type and implement the + // `iced_native::Widget` trait with the `iced_wgpu::Renderer`. + // + // Of course, you can choose to make the implementation renderer-agnostic, + // if you wish to, by creating your own `Renderer` trait, which could be + // implemented by `iced_wgpu` and other renderers. + use iced_native::{ + layout, Element, Geometry2D, Hasher, Layout, Length, + MouseCursor, Point, Size, Vertex2D, Widget, + }; + use iced_wgpu::{Primitive, Renderer}; + + pub struct Rainbow { + dimen: u16, + } + + impl Rainbow { + pub fn new(dimen: u16) -> Self { + Self { dimen } + } + } + + impl Widget for Rainbow { + fn width(&self) -> Length { + Length::Shrink + } + + fn height(&self) -> Length { + Length::Shrink + } + + fn layout( + &self, + _renderer: &Renderer, + _limits: &layout::Limits, + ) -> layout::Node { + layout::Node::new(Size::new( + f32::from(self.dimen), + f32::from(self.dimen), + )) + } + + fn hash_layout(&self, state: &mut Hasher) { + use std::hash::Hash; + + self.dimen.hash(state); + } + + fn draw( + &self, + _renderer: &mut Renderer, + layout: Layout<'_>, + cursor_position: Point, + ) -> (Primitive, MouseCursor) { + let b = layout.bounds(); + + // R O Y G B I V + let color_r = [1.0, 0.0, 0.0, 1.0]; + let color_o = [1.0, 0.5, 0.0, 1.0]; + let color_y = [1.0, 1.0, 0.0, 1.0]; + let color_g = [0.0, 1.0, 0.0, 1.0]; + let color_gb = [0.0, 1.0, 0.5, 1.0]; + let color_b = [0.0, 0.2, 1.0, 1.0]; + let color_i = [0.5, 0.0, 1.0, 1.0]; + let color_v = [0.75, 0.0, 0.5, 1.0]; + + let posn_center = { + if b.contains(cursor_position) { + [cursor_position.x, cursor_position.y] + } else { + [b.x + (b.width / 2.0), b.y + (b.height / 2.0)] + } + }; + + let posn_tl = [b.x, b.y]; + let posn_t = [b.x + (b.width / 2.0), b.y]; + let posn_tr = [b.x + b.width, b.y]; + let posn_r = [b.x + b.width, b.y + (b.height / 2.0)]; + let posn_br = [b.x + b.width, b.y + b.height]; + let posn_b = [b.x + (b.width / 2.0), b.y + b.height]; + let posn_bl = [b.x, b.y + b.height]; + let posn_l = [b.x, b.y + (b.height / 2.0)]; + + ( + Primitive::Geometry2D { + geometry: Geometry2D { + vertices: vec![ + Vertex2D { + position: posn_center, + color: [1.0, 1.0, 1.0, 1.0], + }, + Vertex2D { + position: posn_tl, + color: color_r, + }, + Vertex2D { + position: posn_t, + color: color_o, + }, + Vertex2D { + position: posn_tr, + color: color_y, + }, + Vertex2D { + position: posn_r, + color: color_g, + }, + Vertex2D { + position: posn_br, + color: color_gb, + }, + Vertex2D { + position: posn_b, + color: color_b, + }, + Vertex2D { + position: posn_bl, + color: color_i, + }, + Vertex2D { + position: posn_l, + color: color_v, + }, + ], + indices: vec![ + 0, 1, 2, // TL + 0, 2, 3, // T + 0, 3, 4, // TR + 0, 4, 5, // R + 0, 5, 6, // BR + 0, 6, 7, // B + 0, 7, 8, // BL + 0, 8, 1, // L + ], + }, + }, + MouseCursor::OutOfBounds, + ) + } + } + + impl<'a, Message> Into> for Rainbow { + fn into(self) -> Element<'a, Message, Renderer> { + Element::new(self) + } + } +} + +use iced::{ + scrollable, settings::Window, Align, Column, Container, Element, + Length, Sandbox, Scrollable, Settings, Text, +}; +use rainbow::Rainbow; + +pub fn main() { + Example::run(Settings { + window: Window { + size: (660, 660), + resizable: true, + decorations: true, + }, + }) +} + +struct Example { + dimen: u16, + scroll: scrollable::State, +} + +#[derive(Debug, Clone, Copy)] +enum Message {} + +impl Sandbox for Example { + type Message = Message; + + fn new() -> Self { + Example { + dimen: 500, + scroll: scrollable::State::new(), + } + } + + fn title(&self) -> String { + String::from("Custom 2D geometry - Iced") + } + + fn update(&mut self, _: Message) {} + + fn view(&mut self) -> Element { + let content = Column::new() + .padding(20) + .spacing(20) + .max_width(500) + .align_items(Align::Start) + .push(Rainbow::new(self.dimen)) + .push( + Text::new(String::from("In this example we draw a custom widget Rainbow, using the \ + Geometry2D primitive. This primitive supplies a list of triangles, expressed as vertices and indices.")) + .width(Length::Shrink), + ) + .push( + Text::new(String::from("Move your cursor over it, and see the center vertex follow you!")) + .width(Length::Shrink), + ) + .push( + Text::new(String::from("Every Vertex2D defines its own color. You could use the \ + Geometry2D primitive to render virtually any two-dimensional geometry for your widget.")) + .width(Length::Shrink), + ); + + let scrollable = + Scrollable::new(&mut self.scroll).push(Container::new(content)); + + Container::new(scrollable) + .width(Length::Fill) + .height(Length::Fill) + .center_x() + .center_y() + .into() + } +} -- cgit From 5ca98b113e49bfb2372b245a985f957611a0a1ac Mon Sep 17 00:00:00 2001 From: Héctor Ramón Jiménez Date: Thu, 2 Jan 2020 19:25:00 +0100 Subject: Rename `Geometry2D` to `Mesh2D` and move it to `iced_wgpu` --- examples/geometry.rs | 194 +++++++++++++++++++++++---------------------------- 1 file changed, 88 insertions(+), 106 deletions(-) (limited to 'examples/geometry.rs') diff --git a/examples/geometry.rs b/examples/geometry.rs index feb7684e..ae6c9ca0 100644 --- a/examples/geometry.rs +++ b/examples/geometry.rs @@ -11,24 +11,25 @@ mod rainbow { // if you wish to, by creating your own `Renderer` trait, which could be // implemented by `iced_wgpu` and other renderers. use iced_native::{ - layout, Element, Geometry2D, Hasher, Layout, Length, - MouseCursor, Point, Size, Vertex2D, Widget, + layout, Element, Hasher, Layout, Length, MouseCursor, Point, Size, + Widget, + }; + use iced_wgpu::{ + triangle::{Mesh2D, Vertex2D}, + Primitive, Renderer, }; - use iced_wgpu::{Primitive, Renderer}; - pub struct Rainbow { - dimen: u16, - } + pub struct Rainbow; impl Rainbow { - pub fn new(dimen: u16) -> Self { - Self { dimen } + pub fn new() -> Self { + Self } } impl Widget for Rainbow { fn width(&self) -> Length { - Length::Shrink + Length::Fill } fn height(&self) -> Length { @@ -38,20 +39,15 @@ mod rainbow { fn layout( &self, _renderer: &Renderer, - _limits: &layout::Limits, + limits: &layout::Limits, ) -> layout::Node { - layout::Node::new(Size::new( - f32::from(self.dimen), - f32::from(self.dimen), - )) - } - - fn hash_layout(&self, state: &mut Hasher) { - use std::hash::Hash; + let size = limits.width(Length::Fill).resolve(Size::ZERO); - self.dimen.hash(state); + layout::Node::new(Size::new(size.width, size.width)) } + fn hash_layout(&self, _state: &mut Hasher) {} + fn draw( &self, _renderer: &mut Renderer, @@ -88,58 +84,56 @@ mod rainbow { let posn_l = [b.x, b.y + (b.height / 2.0)]; ( - Primitive::Geometry2D { - geometry: Geometry2D { - vertices: vec![ - Vertex2D { - position: posn_center, - color: [1.0, 1.0, 1.0, 1.0], - }, - Vertex2D { - position: posn_tl, - color: color_r, - }, - Vertex2D { - position: posn_t, - color: color_o, - }, - Vertex2D { - position: posn_tr, - color: color_y, - }, - Vertex2D { - position: posn_r, - color: color_g, - }, - Vertex2D { - position: posn_br, - color: color_gb, - }, - Vertex2D { - position: posn_b, - color: color_b, - }, - Vertex2D { - position: posn_bl, - color: color_i, - }, - Vertex2D { - position: posn_l, - color: color_v, - }, - ], - indices: vec![ - 0, 1, 2, // TL - 0, 2, 3, // T - 0, 3, 4, // TR - 0, 4, 5, // R - 0, 5, 6, // BR - 0, 6, 7, // B - 0, 7, 8, // BL - 0, 8, 1, // L - ], - }, - }, + Primitive::Mesh2D(std::sync::Arc::new(Mesh2D { + vertices: vec![ + Vertex2D { + position: posn_center, + color: [1.0, 1.0, 1.0, 1.0], + }, + Vertex2D { + position: posn_tl, + color: color_r, + }, + Vertex2D { + position: posn_t, + color: color_o, + }, + Vertex2D { + position: posn_tr, + color: color_y, + }, + Vertex2D { + position: posn_r, + color: color_g, + }, + Vertex2D { + position: posn_br, + color: color_gb, + }, + Vertex2D { + position: posn_b, + color: color_b, + }, + Vertex2D { + position: posn_bl, + color: color_i, + }, + Vertex2D { + position: posn_l, + color: color_v, + }, + ], + indices: vec![ + 0, 1, 2, // TL + 0, 2, 3, // T + 0, 3, 4, // TR + 0, 4, 5, // R + 0, 5, 6, // BR + 0, 6, 7, // B + 0, 7, 8, // BL + 0, 8, 1, // L + ], + })), MouseCursor::OutOfBounds, ) } @@ -153,35 +147,24 @@ mod rainbow { } use iced::{ - scrollable, settings::Window, Align, Column, Container, Element, - Length, Sandbox, Scrollable, Settings, Text, + scrollable, Align, Column, Container, Element, Length, Sandbox, Scrollable, + Settings, Text, }; use rainbow::Rainbow; pub fn main() { - Example::run(Settings { - window: Window { - size: (660, 660), - resizable: true, - decorations: true, - }, - }) + Example::run(Settings::default()) } struct Example { - dimen: u16, scroll: scrollable::State, } -#[derive(Debug, Clone, Copy)] -enum Message {} - impl Sandbox for Example { - type Message = Message; + type Message = (); fn new() -> Self { Example { - dimen: 500, scroll: scrollable::State::new(), } } @@ -190,37 +173,36 @@ impl Sandbox for Example { String::from("Custom 2D geometry - Iced") } - fn update(&mut self, _: Message) {} + fn update(&mut self, _: ()) {} - fn view(&mut self) -> Element { + fn view(&mut self) -> Element<()> { let content = Column::new() .padding(20) .spacing(20) .max_width(500) .align_items(Align::Start) - .push(Rainbow::new(self.dimen)) - .push( - Text::new(String::from("In this example we draw a custom widget Rainbow, using the \ - Geometry2D primitive. This primitive supplies a list of triangles, expressed as vertices and indices.")) - .width(Length::Shrink), - ) - .push( - Text::new(String::from("Move your cursor over it, and see the center vertex follow you!")) - .width(Length::Shrink), - ) - .push( - Text::new(String::from("Every Vertex2D defines its own color. You could use the \ - Geometry2D primitive to render virtually any two-dimensional geometry for your widget.")) - .width(Length::Shrink), - ); + .push(Rainbow::new()) + .push(Text::new( + "In this example we draw a custom widget Rainbow, using \ + the Mesh2D primitive. This primitive supplies a list of \ + triangles, expressed as vertices and indices.", + )) + .push(Text::new( + "Move your cursor over it, and see the center vertex \ + follow you!", + )) + .push(Text::new( + "Every Vertex2D defines its own color. You could use the \ + Mesh2D primitive to render virtually any two-dimensional \ + geometry for your widget.", + )); - let scrollable = - Scrollable::new(&mut self.scroll).push(Container::new(content)); + let scrollable = Scrollable::new(&mut self.scroll) + .push(Container::new(content).width(Length::Fill).center_x()); Container::new(scrollable) .width(Length::Fill) .height(Length::Fill) - .center_x() .center_y() .into() } -- cgit