Start work on views system

src/.gitattributes

@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto

src/activities/mod.rs

@@ -0,0 +1,3 @@
+mod test_activity;
+
+pub use test_activity::TestActivity;

src/activities/test_activity.rs

@@ -0,0 +1,166 @@
+use crate::{
+    app::{Activity, App, AppState},
+    log,
+    render::Renderer,
+};
+
+pub struct TestActivity {
+    elements: Vec<Element>,
+}
+
+impl TestActivity {
+    pub fn top_element_at_point(&mut self, x: f32, y: f32) -> Option<(&mut Element, usize)> {
+        for (i, element) in self.elements.iter_mut().enumerate().rev() {
+            if x >= element.x
+                && x <= element.x + element.width
+                && y >= element.y
+                && y <= element.y + element.height
+            {
+                return Some((element, i));
+            }
+        }
+        None
+    }
+
+    pub fn bottom_element_at_point(
+        &mut self,
+        x: f32,
+        y: f32,
+        min_index: usize,
+    ) -> Option<(&mut Element, usize)> {
+        for (i, element) in self.elements.iter_mut().enumerate().skip(min_index) {
+            if x >= element.x
+                && x <= element.x + element.width
+                && y >= element.y
+                && y <= element.y + element.height
+            {
+                return Some((element, i));
+            }
+        }
+        None
+    }
+
+    fn mark_for_redraw(&mut self, current_elements: &mut Vec<usize>, element_index: usize) {
+        current_elements.push(element_index);
+
+        let element = &self.elements[element_index];
+
+        for (x, y) in vec![
+            (element.x.clone(), element.y.clone()),
+            (element.x.clone() + element.width, element.y.clone()),
+            (element.x.clone(), element.y.clone() + element.height),
+            (
+                element.x.clone() + element.width,
+                element.y.clone() + element.height,
+            ),
+        ] {
+            let option = self.bottom_element_at_point(x, y, element_index + 1);
+            if let Some((element, index)) = option {
+                if element_index == index || current_elements.contains(&index) {
+                    continue;
+                }
+
+                self.mark_for_redraw(current_elements, index);
+            }
+        }
+    }
+}
+
+impl Activity for TestActivity {
+    fn new() -> Self
+    where
+        Self: Sized,
+    {
+        Self {
+            elements: Vec::new(),
+        }
+    }
+
+    fn update(&mut self, dt: f32) {
+        // todo!()
+    }
+
+    fn draw(&self, renderer: &mut Renderer, state: &AppState) {
+        renderer.img.randomize(&mut renderer.rand);
+        let (cx, cy) = (renderer.actual_width / 2, renderer.actual_height / 2);
+        renderer.circle(cx as i32, cy as i32, 100, (127, 127, 127));
+
+        // renderer.rect_center_xywh(cx as i32, cy as i32, 200, 200, (155, 127, 155));
+        // renderer.rect_xyxy(10, 10, cx as i32, cy as i32, (255, 127, 155));
+
+        for element in &self.elements {
+            element.draw(renderer);
+        }
+
+        renderer.update();
+    }
+
+    fn l_click(&mut self, renderer: &mut Renderer, state: &AppState) {
+        // log!("Mouse moved");
+        let option = self.top_element_at_point(state.mouse_x, state.mouse_y);
+        if let Some((_, index)) = option {
+            let mut for_redraw: Vec<usize> = Vec::new();
+            self.mark_for_redraw(&mut for_redraw, index);
+
+            for_redraw.sort();
+
+            for n in for_redraw.iter_mut() {
+                let element = &mut self.elements[*n];
+                element.color = (
+                    renderer.rand.next_u32() as u8,
+                    renderer.rand.next_u32() as u8,
+                    renderer.rand.next_u32() as u8,
+                );
+                element.draw(renderer);
+            }
+            renderer.update();
+        } else {
+            self.elements.push(Element::new(
+                state.mouse_x,
+                state.mouse_y,
+                50.0,
+                50.0,
+                (
+                    renderer.rand.next_u32() as u8,
+                    renderer.rand.next_u32() as u8,
+                    renderer.rand.next_u32() as u8,
+                ),
+            ));
+
+            self.draw(renderer, state);
+            renderer.update();
+        }
+    }
+
+    fn mouse_move(&mut self, renderer: &mut Renderer, state: &AppState) {}
+}
+
+pub struct Element {
+    pub x: f32,
+    pub y: f32,
+    pub width: f32,
+    pub height: f32,
+    pub color: (u8, u8, u8),
+}
+
+impl Element {
+    pub fn new(x: f32, y: f32, width: f32, height: f32, color: (u8, u8, u8)) -> Self {
+        Self {
+            x,
+            y,
+            width,
+            height,
+            color,
+        }
+    }
+
+    pub fn draw(&self, renderer: &mut Renderer) {
+        renderer.rect_xywh(
+            self.x as i32,
+            self.y as i32,
+            self.width as i32,
+            self.height as i32,
+            self.color,
+        );
+    }
+}

src/app.rs

@@ -1,57 +0,0 @@
-use wasm_bindgen::prelude::wasm_bindgen;
-
-use crate::render::Renderer;
-
-pub trait Activity {
-    fn new() -> Self
-    where
-        Self: Sized;
-    fn update(&mut self, dt: f32);
-    fn draw(&self, ctx: &mut Renderer);
-}
-
-#[wasm_bindgen]
-pub struct App {
-    pub(crate) activities: Vec<Box<dyn Activity>>,
-    pub(crate) renderer: Renderer,
-    pub(crate) current_activity: Option<usize>,
-}
-
-impl App {
-    pub fn new(renderer: Renderer) -> Self {
-        App {
-            activities: Vec::new(),
-            renderer,
-            current_activity: None,
-        }
-    }
-
-    pub fn draw(&mut self) {
-        // if let Some(current_activity) = self.current_activity {
-        //     self.activities[current_activity].draw(&mut self.renderer);
-        // }
-        self.renderer.img.randomize(&mut self.renderer.rand);
-
-        let (cx, cy) = (
-            self.renderer.actual_width / 2,
-            self.renderer.actual_height / 2,
-        );
-
-        self.renderer
-            .circle(cx as i32, cy as i32, 200, (255, 255, 255));
-
-        self.renderer.update();
-    }
-}
-
-// App events
-impl App {
-    pub fn resize(&mut self, width: u32, height: u32) {
-        self.renderer.resize(width, height);
-        self.draw();
-    }
-
-    pub fn click(&mut self, x: f32, y: f32) {
-        // self.renderer.click(x, y);
-    }
-}

src/app/cursors.rs

@@ -0,0 +1,91 @@
+use wasm_bindgen::prelude::wasm_bindgen;
+
+#[wasm_bindgen(module = "/js/index.js")]
+extern "C" {
+    fn cursor(name: &str);
+}
+
+pub fn set_cursor(c: Cursor) {
+    cursor(c.value());
+}
+
+#[allow(dead_code)]
+pub enum Cursor {
+    Alias,
+    AllScroll,
+    Auto,
+    Cell,
+    ColResize,
+    ContextMenu,
+    Copy,
+    Crosshair,
+    Default,
+    EResize,
+    EWResize,
+    Grab,
+    Grabbing,
+    Help,
+    Move,
+    NResize,
+    NEResize,
+    NESWResize,
+    NSResize,
+    NWResize,
+    NWSEResize,
+    NoDrop,
+    None,
+    NotAllowed,
+    Pointer,
+    Progress,
+    RowResize,
+    SResize,
+    SEResize,
+    SWResize,
+    Text,
+    WResize,
+    Wait,
+    ZoomIn,
+    ZoomOut,
+}
+
+impl Cursor {
+    fn value(&self) -> &str {
+        match self {
+            Cursor::Alias => "alias",
+            Cursor::AllScroll => "all-scroll",
+            Cursor::Auto => "auto",
+            Cursor::Cell => "cell",
+            Cursor::ColResize => "col-resize",
+            Cursor::ContextMenu => "context-menu",
+            Cursor::Copy => "copy",
+            Cursor::Crosshair => "crosshair",
+            Cursor::Default => "default",
+            Cursor::EResize => "e-resize",
+            Cursor::EWResize => "ew-resize",
+            Cursor::Grab => "grab",
+            Cursor::Grabbing => "grabbing",
+            Cursor::Help => "help",
+            Cursor::Move => "move",
+            Cursor::NResize => "n-resize",
+            Cursor::NEResize => "ne-resize",
+            Cursor::NESWResize => "nesw-resize",
+            Cursor::NSResize => "ns-resize",
+            Cursor::NWResize => "nw-resize",
+            Cursor::NWSEResize => "nwse-resize",
+            Cursor::NoDrop => "no-drop",
+            Cursor::None => "none",
+            Cursor::NotAllowed => "not-allowed",
+            Cursor::Pointer => "pointer",
+            Cursor::Progress => "progress",
+            Cursor::RowResize => "row-resize",
+            Cursor::SResize => "s-resize",
+            Cursor::SEResize => "se-resize",
+            Cursor::SWResize => "sw-resize",
+            Cursor::Text => "text",
+            Cursor::WResize => "w-resize",
+            Cursor::Wait => "wait",
+            Cursor::ZoomIn => "zoom-in",
+            Cursor::ZoomOut => "zoom-out",
+        }
+    }
+}

src/app/mod.rs

@@ -0,0 +1,93 @@
+mod cursors;
+
+pub use cursors::{Cursor, set_cursor};
+
+use wasm_bindgen::prelude::wasm_bindgen;
+
+use crate::{
+    log,
+    render::Renderer,
+    views::{View, default_view},
+};
+
+pub trait Activity {
+    fn new() -> Self
+    where
+        Self: Sized;
+    fn update(&mut self, dt: f32);
+    fn draw(&self, renderer: &mut Renderer, state: &AppState);
+    fn l_click(&mut self, renderer: &mut Renderer, state: &AppState);
+    fn mouse_move(&mut self, renderer: &mut Renderer, state: &AppState);
+}
+
+#[wasm_bindgen]
+pub struct App {
+    // pub(crate) activities: Vec<Box<dyn Activity>>,
+    pub(crate) root_view: Option<Box<dyn View>>,
+    pub(crate) renderer: Renderer,
+    // pub(crate) current_activity: Option<usize>,
+    pub(crate) state: AppState,
+}
+
+pub struct AppState {
+    pub(crate) mouse_x: f32,
+    pub(crate) mouse_y: f32,
+}
+
+impl AppState {
+    pub fn new() -> Self {
+        AppState {
+            mouse_x: 0.0,
+            mouse_y: 0.0,
+        }
+    }
+}
+
+impl App {
+    pub fn new(renderer: Renderer) -> Self {
+        App {
+            root_view: Some(default_view()),
+            renderer,
+            // current_activity: Some(0),
+            state: AppState::new(),
+        }
+    }
+
+    pub fn draw(&mut self) {
+        if let Some(view) = &self.root_view {
+            let (width, height) = (
+                self.renderer.actual_width.clone() as f32,
+                self.renderer.actual_height.clone() as f32,
+            );
+
+            view.draw(&mut self.renderer, 0., 0., width, height);
+            self.renderer.update();
+        }
+    }
+}
+
+// App events
+impl App {
+    pub fn resize(&mut self, width: u32, height: u32) {
+        self.renderer.resize(width, height);
+        self.draw();
+    }
+
+    pub fn mouse_move(&mut self, x: f32, y: f32) {
+        self.state.mouse_x = x;
+        self.state.mouse_y = y;
+
+        // if let Some(current_activity) = self.current_activity {
+        //     self.activities[current_activity].mouse_move(&mut self.renderer, &self.state);
+        // }
+    }
+
+    pub fn l_click(&mut self, x: f32, y: f32) {
+        self.state.mouse_x = x;
+        self.state.mouse_y = y;
+
+        // if let Some(current_activity) = self.current_activity {
+        //     self.activities[current_activity].l_click(&mut self.renderer, &self.state);
+        // }
+    }
+}

src/draw.rs

@@ -1,15 +0,0 @@
-use crate::render::Renderer;
-
-pub fn draw(ctx: &mut Renderer) {
-    // // Draw the background
-    // ctx.background(0.0, 0.0, 0.0);
-
-    // // Draw the foreground
-    // ctx.fill(1.0, 1.0, 1.0);
-    // ctx.rect(50.0, 50.0, 100.0, 100.0);
-    //
-
-    let (cx, cy) = (ctx.actual_width / 2, ctx.actual_height / 2);
-
-    ctx.circle(cx as i32, cy as i32, 200, (255, 255, 255));
-}

src/lib.rs

@@ -1,5 +1,7 @@
+// mod activities;
 mod app;
 mod render;
+mod views;
 
 use wasm_bindgen::{Clamped, prelude::*};
 use web_sys::ImageData;
@@ -8,7 +10,10 @@ use web_sys::ImageData;
 use render::buffer::ImgBuffer;
 use render::rand::Rnd;
 
-use crate::{app::App, render::Renderer};
+use crate::{
+    app::{App, Cursor, set_cursor},
+    render::Renderer,
+};
 
 #[wasm_bindgen]
 extern "C" {
@@ -28,6 +33,7 @@ pub fn init(canvas: &web_sys::HtmlCanvasElement, width: u32, height: u32) -> App
     canvas.set_height(cheight);
 
     log!("WASM Successfully initialized!");
+    // set_cursor(Cursor::Auto);
 
     let mut renderer = Renderer {
         ctx: canvas
@@ -65,17 +71,13 @@ pub fn draw(app: &mut App) {
 }
 
 #[wasm_bindgen]
-pub fn click(app: &mut App, x: i32, y: i32) {
+pub fn click(app: &mut App, x: f32, y: f32) {
     // ctx.img.randomize(&mut ctx.rand);
     // draw::draw(ctx);
-
-    app.renderer.circle(x, y, 20, (255, 255, 255));
-
-    let data = ImageData::new_with_u8_clamped_array_and_sh(
-        Clamped(&app.renderer.img.data),
-        app.renderer.img.width(),
-        app.renderer.img.height(),
-    )
-    .unwrap();
-    app.renderer.ctx.put_image_data(&data, 0., 0.).unwrap();
+    app.l_click(x, y);
+}
+
+#[wasm_bindgen]
+pub fn mouse_move(app: &mut App, x: f32, y: f32) {
+    app.mouse_move(x, y);
 }

src/render/mod.rs

@@ -4,7 +4,7 @@ mod renderer;
 
 pub use renderer::Renderer;
 
-pub const RESOLUTION: u32 = 800;
+pub const RESOLUTION: u32 = 1200;
 
 pub fn calc_resolution(width: u32, height: u32) -> (u32, u32, f32, f32) {
     let aspect = width as f32 / height as f32;
@@ -15,3 +15,21 @@ pub fn calc_resolution(width: u32, height: u32) -> (u32, u32, f32, f32) {
     let new_height = (distortion_y * RESOLUTION as f32).round() as u32;
     (new_width, new_height, distortion_x, distortion_y)
 }
+
+// aspect = width / height
+// dist_x = aspect
+// dist_y = height / width
+//
+// cw = RES * width / height
+// ch = RES * height / width
+//
+// ux = x * (width / cw)
+// ux = x * (width / (RES * width / height))
+// ux = x * (height / RES)
+//
+// uy = y * (width / RES)
+//
+// e = (cw * ch) / (width * height)
+// e = ((RES * (width / height)) * RES * height / width) / (width * height)
+// e = ((RES * (1 / height)) * RES * (1 / width)
+// e = RES^2 / (width * height)

src/render/renderer.rs

@@ -1,10 +1,7 @@
 use wasm_bindgen::{Clamped, prelude::*};
 use web_sys::ImageData;
 
-use crate::{
-    log,
-    render::{buffer::ImgBuffer, calc_resolution, rand::Rnd},
-};
+use crate::render::{RESOLUTION, buffer::ImgBuffer, calc_resolution, rand::Rnd};
 
 #[wasm_bindgen]
 pub struct Renderer {
@@ -72,6 +69,10 @@ impl Renderer {
         .unwrap();
         self.ctx.put_image_data(&data, 0., 0.).unwrap();
     }
+
+    pub fn clear(&mut self) {
+        self.img.data = vec![0; (self.img.width() * self.img.height() * 4) as usize];
+    }
 }
 
 impl Renderer {
@@ -82,6 +83,47 @@ impl Renderer {
         )
     }
 
+    /// Draw a rectangle centered at (cx, cy) with the given width and height.
+    pub fn rect_center_xywh(
+        &mut self,
+        cx: i32,
+        cy: i32,
+        width: i32,
+        height: i32,
+        color: (u8, u8, u8),
+    ) {
+        self.rect_xyxy(
+            cx - width / 2,
+            cy - height / 2,
+            cx + width / 2,
+            cy + height / 2,
+            color,
+        );
+    }
+
+    /// Draw a rectangle at (x, y) with the given width and height.
+    pub fn rect_xywh(&mut self, x: i32, y: i32, width: i32, height: i32, color: (u8, u8, u8)) {
+        self.rect_xyxy(x, y, x + width, y + height, color);
+    }
+
+    /// Draw a rectangle at (x1, y1) with the given width and height.
+    pub fn rect_xyxy(&mut self, x1: i32, y1: i32, x2: i32, y2: i32, color: (u8, u8, u8)) {
+        let (leftx, topy) = self.undistort(x1 as f32, y1 as f32);
+        let (rightx, bottomy) = self.undistort(x2 as f32, y2 as f32);
+
+        let leftx = leftx.max(0f32);
+        let topy = topy.max(0f32);
+        let rightx = rightx.min(self.canvas_width as f32);
+        let bottomy = bottomy.min(self.canvas_height as f32);
+
+        for x in leftx as i32..rightx as i32 {
+            for y in topy as i32..bottomy as i32 {
+                self.img.set_pixel(x as u32, y as u32, color);
+            }
+        }
+    }
+
+    /// Calculate the square distance between two points on the screen, and convert to canvas coordinates for processing
     pub fn screen_dist_sq(&self, x: f32, y: f32, rx: f32, ry: f32) -> f32 {
         (rx - x).powf(2.) * self.distortion_y + (ry - y).powf(2.) * self.distortion_x
     }
@@ -99,8 +141,10 @@ impl Renderer {
         let rightx = rightx.min(self.canvas_width as f32);
         let bottomy = bottomy.min(self.canvas_height as f32);
 
-        let e = (self.canvas_height as f32 / self.actual_height as f32)
-            * (self.canvas_width as f32 / self.actual_width as f32);
+        // let e = (self.canvas_height as f32 / self.actual_height as f32)
+        //     * (self.canvas_width as f32 / self.actual_width as f32);
+
+        let e = RESOLUTION.pow(2) as f32 / (self.actual_width * self.actual_height) as f32;
 
         let r2 = (radius).powf(2.) * e;
 

src/views/color_rect_view.rs

@@ -0,0 +1,25 @@
+use crate::{
+    log,
+    render::Renderer,
+    views::{Bounds, View},
+};
+
+pub struct ColorRectView {
+    color: (u8, u8, u8),
+}
+
+impl ColorRectView {
+    pub fn new(r: u8, g: u8, b: u8) -> Self {
+        Self { color: (r, g, b) }
+    }
+}
+
+impl View for ColorRectView {
+    fn draw(&self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32) {
+        renderer.rect_xywh(x as i32, y as i32, w as i32, h as i32, self.color);
+        log!("Draw");
+    }
+    fn bounds(&self, _ph: f32, _pw: f32) -> (Bounds, Bounds) {
+        (Bounds::MatchParent, Bounds::Pixels(2200.))
+    }
+}

src/views/mod.rs

@@ -0,0 +1,28 @@
+use crate::render::Renderer;
+
+mod color_rect_view;
+mod vertical_layout;
+
+use color_rect_view::ColorRectView;
+use vertical_layout::VerticalLayout;
+
+pub trait View {
+    fn draw(&self, renderer: &mut Renderer, x: f32, y: f32, w: f32, h: f32);
+    fn bounds(&self, pw: f32, ph: f32) -> (Bounds, Bounds);
+}
+
+pub enum Bounds {
+    MatchParent,
+    Pixels(f32),
+}
+
+// pub trait ViewPosition: Drawable {
+//     // fn draw(&self)
+// }
+
+pub fn default_view() -> Box<dyn View> {
+    Box::new(VerticalLayout::new(vec![
+        Box::new(ColorRectView::new(12, 34, 56)),
+        Box::new(ColorRectView::new(20, 60, 80)),
+    ]))
+}

src/views/vertical_layout.rs

@@ -0,0 +1,59 @@
+use crate::views::{Bounds, View};
+
+pub struct VerticalLayout {
+    pub views: Vec<Box<dyn View>>,
+}
+
+impl VerticalLayout {
+    pub fn new(views: Vec<Box<dyn View>>) -> Self {
+        Self { views }
+    }
+}
+
+impl View for VerticalLayout {
+    fn draw(&self, renderer: &mut crate::render::Renderer, x: f32, y: f32, w: f32, h: f32) {
+        let mut cur_y = y;
+
+        for view in &self.views {
+            let (vx, vy) = view.bounds(w, h);
+
+            let vx = match vx {
+                super::Bounds::MatchParent => w,
+                super::Bounds::Pixels(x) => x,
+            };
+
+            let vy = match vy {
+                super::Bounds::MatchParent => h,
+                super::Bounds::Pixels(x) => x,
+            };
+
+            view.draw(renderer, x, cur_y, w.min(vx), vy);
+            cur_y += vy;
+            if cur_y > h {
+                return;
+            }
+        }
+    }
+
+    fn bounds(&self, pw: f32, ph: f32) -> (Bounds, Bounds) {
+        let (mut maxx, mut totaly): (f32, f32) = (0., 0.);
+        for view in &self.views {
+            let (vx, vy) = view.bounds(pw, ph);
+
+            let vx = match vx {
+                super::Bounds::MatchParent => pw,
+                super::Bounds::Pixels(x) => x,
+            };
+
+            let vy = match vy {
+                super::Bounds::MatchParent => ph,
+                super::Bounds::Pixels(x) => x,
+            };
+
+            maxx = maxx.max(vx);
+            totaly += vy;
+        }
+
+        (Bounds::Pixels(maxx), Bounds::Pixels(totaly))
+    }
+}