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Canvas based zoomable image with good logging.

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Bill Thiede 2023-02-18 19:00:03 -08:00
parent 4148ab3c24
commit a0aae68a97
5 changed files with 407 additions and 331 deletions
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@ -666,45 +579,31 @@ checksum = "ddccb15bcce173023b3fedd9436f882a0739b8dfb45e4f6b6002bee5929f61b2"
[[package]] [[package]]
name = "seed" name = "seed"
version = "0.8.0" version = "0.9.2"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3b599be9cc57456f4b7fc99b8abfb154d4819f7b6c147e80be5580663dad4536" checksum = "9352d75dd253803ce05722fe3acaafffc461d4faeaf0ebe0d8bf831059482e21"
dependencies = [ dependencies = [
"console_error_panic_hook", "console_error_panic_hook",
"cookie", "cookie",
"dbg", "dbg",
"enclose", "enclose",
"futures", "futures",
"getrandom",
"gloo-file", "gloo-file",
"gloo-timers", "gloo-timers",
"gloo-utils",
"indexmap", "indexmap",
"js-sys", "js-sys",
"pulldown-cmark",
"rand", "rand",
"serde", "serde",
"serde_json", "serde_json",
"uuid", "uuid",
"version_check 0.9.3", "version_check 0.9.4",
"wasm-bindgen", "wasm-bindgen",
"wasm-bindgen-futures", "wasm-bindgen-futures",
"web-sys", "web-sys",
] ]
[[package]]
name = "semver"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
dependencies = [
"semver-parser",
]
[[package]]
name = "semver-parser"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
[[package]] [[package]]
name = "serde" name = "serde"
version = "1.0.152" version = "1.0.152"
@ -727,21 +626,15 @@ dependencies = [
[[package]] [[package]]
name = "serde_json" name = "serde_json"
version = "1.0.64" version = "1.0.93"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79" checksum = "cad406b69c91885b5107daf2c29572f6c8cdb3c66826821e286c533490c0bc76"
dependencies = [ dependencies = [
"itoa", "itoa",
"ryu", "ryu",
"serde", "serde",
] ]
[[package]]
name = "sha1"
version = "0.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
[[package]] [[package]]
name = "slab" name = "slab"
version = "0.4.2" version = "0.4.2"
@ -754,64 +647,6 @@ version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0" checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"
[[package]]
name = "standback"
version = "0.2.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e113fb6f3de07a243d434a56ec6f186dfd51cb08448239fe7bcae73f87ff28ff"
dependencies = [
"version_check 0.9.3",
]
[[package]]
name = "stdweb"
version = "0.4.20"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d022496b16281348b52d0e30ae99e01a73d737b2f45d38fed4edf79f9325a1d5"
dependencies = [
"discard",
"rustc_version",
"stdweb-derive",
"stdweb-internal-macros",
"stdweb-internal-runtime",
"wasm-bindgen",
]
[[package]]
name = "stdweb-derive"
version = "0.5.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c87a60a40fccc84bef0652345bbbbbe20a605bf5d0ce81719fc476f5c03b50ef"
dependencies = [
"proc-macro2",
"quote",
"serde",
"serde_derive",
"syn",
]
[[package]]
name = "stdweb-internal-macros"
version = "0.2.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
dependencies = [
"base-x",
"proc-macro2",
"quote",
"serde",
"serde_derive",
"serde_json",
"sha1",
"syn",
]
[[package]]
name = "stdweb-internal-runtime"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
[[package]] [[package]]
name = "syn" name = "syn"
version = "1.0.107" version = "1.0.107"
@ -865,40 +700,29 @@ dependencies = [
[[package]] [[package]]
name = "time" name = "time"
version = "0.2.26" version = "0.3.19"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "08a8cbfbf47955132d0202d1662f49b2423ae35862aee471f3ba4b133358f372" checksum = "53250a3b3fed8ff8fd988587d8925d26a83ac3845d9e03b220b37f34c2b8d6c2"
dependencies = [ dependencies = [
"const_fn", "itoa",
"libc", "serde",
"standback", "time-core",
"stdweb",
"time-macros", "time-macros",
"version_check 0.9.3",
"winapi",
] ]
[[package]]
name = "time-core"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
[[package]] [[package]]
name = "time-macros" name = "time-macros"
version = "0.1.1" version = "0.2.7"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "957e9c6e26f12cb6d0dd7fc776bb67a706312e7299aed74c8dd5b17ebb27e2f1" checksum = "a460aeb8de6dcb0f381e1ee05f1cd56fcf5a5f6eb8187ff3d8f0b11078d38b7c"
dependencies = [ dependencies = [
"proc-macro-hack", "time-core",
"time-macros-impl",
]
[[package]]
name = "time-macros-impl"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e5c3be1edfad6027c69f5491cf4cb310d1a71ecd6af742788c6ff8bced86b8fa"
dependencies = [
"proc-macro-hack",
"proc-macro2",
"quote",
"standback",
"syn",
] ]
[[package]] [[package]]
@ -906,21 +730,15 @@ name = "tracerviewer"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"chrono", "chrono",
"console_log",
"humantime", "humantime",
"log",
"seed", "seed",
"serde", "serde",
"thiserror", "thiserror",
"wasm-bindgen-test", "wasm-bindgen-test",
"wasm-timer", "wasm-timer",
] "web-sys",
[[package]]
name = "unicase"
version = "2.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
dependencies = [
"version_check 0.9.3",
] ]
[[package]] [[package]]
@ -937,11 +755,11 @@ checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
[[package]] [[package]]
name = "uuid" name = "uuid"
version = "0.8.2" version = "1.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bc5cf98d8186244414c848017f0e2676b3fcb46807f6668a97dfe67359a3c4b7" checksum = "1674845326ee10d37ca60470760d4288a6f80f304007d92e5c53bab78c9cfd79"
dependencies = [ dependencies = [
"getrandom 0.2.2", "getrandom",
] ]
[[package]] [[package]]
@ -952,15 +770,9 @@ checksum = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
[[package]] [[package]]
name = "version_check" name = "version_check"
version = "0.9.3" version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe" checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
[[package]]
name = "wasi"
version = "0.9.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
[[package]] [[package]]
name = "wasi" name = "wasi"
@ -969,12 +781,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f" checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
[[package]] [[package]]
name = "wasm-bindgen" name = "wasi"
version = "0.2.73" version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "83240549659d187488f91f33c0f8547cbfef0b2088bc470c116d1d260ef623d9" checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]]
name = "wasm-bindgen"
version = "0.2.84"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "31f8dcbc21f30d9b8f2ea926ecb58f6b91192c17e9d33594b3df58b2007ca53b"
dependencies = [ dependencies = [
"cfg-if 1.0.0", "cfg-if",
"serde", "serde",
"serde_json", "serde_json",
"wasm-bindgen-macro", "wasm-bindgen-macro",
@ -982,13 +800,13 @@ dependencies = [
[[package]] [[package]]
name = "wasm-bindgen-backend" name = "wasm-bindgen-backend"
version = "0.2.73" version = "0.2.84"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ae70622411ca953215ca6d06d3ebeb1e915f0f6613e3b495122878d7ebec7dae" checksum = "95ce90fd5bcc06af55a641a86428ee4229e44e07033963a2290a8e241607ccb9"
dependencies = [ dependencies = [
"bumpalo", "bumpalo",
"lazy_static",
"log", "log",
"once_cell",
"proc-macro2", "proc-macro2",
"quote", "quote",
"syn", "syn",
@ -997,11 +815,11 @@ dependencies = [
[[package]] [[package]]
name = "wasm-bindgen-futures" name = "wasm-bindgen-futures"
version = "0.4.23" version = "0.4.34"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "81b8b767af23de6ac18bf2168b690bed2902743ddf0fb39252e36f9e2bfc63ea" checksum = "f219e0d211ba40266969f6dbdd90636da12f75bee4fc9d6c23d1260dadb51454"
dependencies = [ dependencies = [
"cfg-if 1.0.0", "cfg-if",
"js-sys", "js-sys",
"wasm-bindgen", "wasm-bindgen",
"web-sys", "web-sys",
@ -1009,9 +827,9 @@ dependencies = [
[[package]] [[package]]
name = "wasm-bindgen-macro" name = "wasm-bindgen-macro"
version = "0.2.73" version = "0.2.84"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3e734d91443f177bfdb41969de821e15c516931c3c3db3d318fa1b68975d0f6f" checksum = "4c21f77c0bedc37fd5dc21f897894a5ca01e7bb159884559461862ae90c0b4c5"
dependencies = [ dependencies = [
"quote", "quote",
"wasm-bindgen-macro-support", "wasm-bindgen-macro-support",
@ -1019,9 +837,9 @@ dependencies = [
[[package]] [[package]]
name = "wasm-bindgen-macro-support" name = "wasm-bindgen-macro-support"
version = "0.2.73" version = "0.2.84"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d53739ff08c8a68b0fdbcd54c372b8ab800b1449ab3c9d706503bc7dd1621b2c" checksum = "2aff81306fcac3c7515ad4e177f521b5c9a15f2b08f4e32d823066102f35a5f6"
dependencies = [ dependencies = [
"proc-macro2", "proc-macro2",
"quote", "quote",
@ -1032,9 +850,9 @@ dependencies = [
[[package]] [[package]]
name = "wasm-bindgen-shared" name = "wasm-bindgen-shared"
version = "0.2.73" version = "0.2.84"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d9a543ae66aa233d14bb765ed9af4a33e81b8b58d1584cf1b47ff8cd0b9e4489" checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
[[package]] [[package]]
name = "wasm-bindgen-test" name = "wasm-bindgen-test"
@ -1077,9 +895,9 @@ dependencies = [
[[package]] [[package]]
name = "web-sys" name = "web-sys"
version = "0.3.50" version = "0.3.61"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a905d57e488fec8861446d3393670fb50d27a262344013181c2cdf9fff5481be" checksum = "e33b99f4b23ba3eec1a53ac264e35a755f00e966e0065077d6027c0f575b0b97"
dependencies = [ dependencies = [
"js-sys", "js-sys",
"wasm-bindgen", "wasm-bindgen",

12
Cargo.toml
View File

@ -17,12 +17,22 @@ wasm-bindgen-test = "0.3.18"
[dependencies] [dependencies]
chrono = "0.4.23" chrono = "0.4.23"
console_log = {git = "http://git.z.xinu.tv/wathiede/console_log"}
humantime = "2.1.0" humantime = "2.1.0"
seed = "0.8.0" log = "0.4.17"
seed = "0.9.2"
serde = "1.0.152" serde = "1.0.152"
thiserror = "1.0.38" thiserror = "1.0.38"
wasm-timer = "0.2.5" wasm-timer = "0.2.5"
[dependencies.web-sys]
version = "0.3.58"
features = [
"CanvasRenderingContext2d",
"HtmlImageElement",
"ImageData",
]
[profile.release] [profile.release]
lto = true lto = true
opt-level = 'z' opt-level = 'z'

4
index.css
View File

@ -21,3 +21,7 @@ html, body, #root {
.fresh { .fresh {
color: #4f4; color: #4f4;
} }
.image {
width: 100%;
}

1
index.html
View File

@ -2,6 +2,7 @@
<html lang="en"> <html lang="en">
<head> <head>
<title>Traceviewer</title>
<meta charset="utf-8"> <meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="modulepreload" href="/pkg/package.js" as="script" type="text/javascript"> <link rel="modulepreload" href="/pkg/package.js" as="script" type="text/javascript">

287
src/lib.rs
View File

@ -3,19 +3,21 @@
// but some rules are too "annoying" or are not applicable for your case.) // but some rules are too "annoying" or are not applicable for your case.)
#![allow(clippy::wildcard_imports)] #![allow(clippy::wildcard_imports)]
use std::{sync::Arc, time::Duration}; use std::time::Duration;
use chrono::{DateTime, Local, NaiveDateTime, TimeZone}; use chrono::{Local, NaiveDateTime, TimeZone};
use log::Level;
use seed::{prelude::*, *}; use seed::{prelude::*, *};
use thiserror::Error; use thiserror::Error;
use wasm_timer::{SystemTime, UNIX_EPOCH}; use wasm_timer::{SystemTime, UNIX_EPOCH};
use web_sys::{HtmlCanvasElement, HtmlImageElement};
const ROOT_URL: &'static str = "/www/tracer/"; const ROOT_URL: &'static str = "/www/tracer/";
#[derive(Clone, Error, Debug)] #[derive(Clone, Error, Debug)]
pub enum AppError { pub enum AppError {
#[error("fetch error")] #[error("fetch error: {0}")]
FetchError(Arc<FetchError>), FetchError(String),
} }
// ------ ------ // ------ ------
@ -25,10 +27,15 @@ pub enum AppError {
// `init` describes what should happen when your app started. // `init` describes what should happen when your app started.
fn init(_: Url, orders: &mut impl Orders<Msg>) -> Model { fn init(_: Url, orders: &mut impl Orders<Msg>) -> Model {
let timer_handle = orders.stream_with_handle(streams::interval(1000, || Msg::OnCheck)); let timer_handle = orders.stream_with_handle(streams::interval(1000, || Msg::OnCheck));
orders.after_next_render(|_| Msg::Rendered);
Model { Model {
timer_handle, timer_handle,
data: None, data: None,
error: None, error: None,
image_canvas: ElRef::<HtmlCanvasElement>::default(),
image_ref: ElRef::<HtmlImageElement>::default(),
zoom: 1.0,
offset: [0., 0.],
} }
} }
@ -41,19 +48,26 @@ struct Model {
timer_handle: StreamHandle, timer_handle: StreamHandle,
data: Option<Data>, data: Option<Data>,
error: Option<AppError>, error: Option<AppError>,
image_canvas: ElRef<HtmlCanvasElement>,
image_ref: ElRef<HtmlImageElement>,
zoom: f64,
offset: [f64; 2],
} }
// ------ ------ // ------ ------
// Update // Update
// ------ ------ // ------ ------
// (Remove the line below once any of your `Msg` variants doesn't implement `Copy`.)
#[derive(Clone)] #[derive(Clone)]
// `Msg` describes the different events you can modify state with. // `Msg` describes the different events you can modify state with.
enum Msg { enum Msg {
OnCheck, OnCheck,
OnError(AppError), OnError(AppError),
Rendered,
Received(Data), Received(Data),
Reset,
Zoom(f64, [i32; 2]),
Move([f64; 2]),
} }
// `update` describes how to handle each `Msg`. // `update` describes how to handle each `Msg`.
@ -76,16 +90,57 @@ fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg>) {
match response match response
.check_status() // ensure we've got 2xx status .check_status() // ensure we've got 2xx status
.expect("status check failed") {Ok(data)=>
.json::<Data>() match data
.await .json::<Data>()
{ .await
Ok(data) => Msg::Received(data), {
Err(e) => Msg::OnError(AppError::FetchError(Arc::new(e))), Ok(data) => Msg::Received(data),
} Err(e) => Msg::OnError(AppError::FetchError(format!("{:?}",e))),
},
Err(e) => Msg::OnError(AppError::FetchError(format!("{:?}",e))),
}
}); });
} }
Msg::Received(data) => model.data = Some(data), Msg::Received(data) => {
if let Some(d) = &model.data {
if d.timestamp != data.timestamp {
model.data = Some(data);
}
} else {
model.data = Some(data);
}
}
Msg::Rendered => {
draw(
&model.image_canvas,
&model.image_ref,
model.zoom,
model.offset,
);
// We want to call `.skip` to prevent infinite loop.
// (However infinite loops are useful for animations.)
// TODO(wathiede): can this be done less often?
orders.after_next_render(|_| Msg::Rendered).skip();
}
Msg::Reset => {
model.zoom = 1.;
model.offset = [0., 0.];
}
Msg::Zoom(scale, at) => {
let old_zoom = model.zoom;
model.zoom += scale;
if model.zoom < 0.1 {
model.zoom = 0.1;
}
let z_rat = model.zoom / old_zoom;
let at = [at[0] as f64, at[1] as f64];
model.offset = [
at[0] - (z_rat) * (at[0] - model.offset[0]),
at[1] - (z_rat) * (at[1] - model.offset[1]),
];
}
Msg::Move(delta) => model.offset = [model.offset[0] + delta[0], model.offset[1] + delta[1]],
} }
} }
use serde::{Deserialize, Serialize}; use serde::{Deserialize, Serialize};
@ -173,34 +228,215 @@ fn view_metadata_table(data: &Data) -> Node<Msg> {
] ]
} }
fn view_image(im: &ImageMetadata) -> Node<Msg> { fn draw(
canvas: &ElRef<HtmlCanvasElement>,
image: &ElRef<HtmlImageElement>,
zoom: f64,
offset: [f64; 2],
) {
let (canvas, image) = match (canvas.get(), image.get()) {
(Some(canvas), Some(image)) => (canvas, image),
_ => {
return;
}
};
#[derive(Serialize)]
struct ContextOptions {
#[serde(rename = "willReadFrequently")]
will_read_frequently: bool,
}
let ctx = canvas
.get_context_with_context_options(
"2d",
&wasm_bindgen::JsValue::from_serde(&ContextOptions {
will_read_frequently: true,
})
.unwrap(),
)
.expect("Problem getting canvas context")
.expect("The canvas context is empty")
.dyn_into::<web_sys::CanvasRenderingContext2d>()
.expect("Problem casting as web_sys::CanvasRenderingContext2d");
let width = canvas.width();
let height = canvas.height();
let dw = width as f64;
let dh = height as f64;
// clear canvas
ctx.begin_path();
ctx.clear_rect(0., 0., dw, dh);
let sx = 0.;
let sy = 0.;
let sw = image.width() as f64;
let sh = image.height() as f64;
let dx = offset[0];
let dy = offset[1];
let dw = dw * zoom;
let dh = dh * zoom;
ctx.draw_image_with_html_image_element_and_sw_and_sh_and_dx_and_dy_and_dw_and_dh(
&image, sx, sy, sw, sh, dx, dy, dw, dh,
)
.unwrap();
//let color = ctx.get_image_data(10.0, 10.0, 11.0, 11.0).unwrap().data();
}
fn view_image(
im: &ImageMetadata,
image_canvas: &ElRef<HtmlCanvasElement>,
image_ref: &ElRef<HtmlImageElement>,
) -> Node<Msg> {
let url = format!("{ROOT_URL}/{}", im.image); let url = format!("{ROOT_URL}/{}", im.image);
let attrs = if let Some(canvas) = image_canvas.get() {
Some(attrs![
At::Width => px(canvas.client_width()),
At::Height => px(canvas.client_height()),
])
} else {
None
};
div![ div![
a![attrs! {At::Href => url}, p![&im.name]], C!["image"],
a![attrs! {At::Href => url}, img![attrs! { At::Src => url}]] canvas![
el_ref(image_canvas),
C!["image"],
attrs,
attrs! {
At::Draggable=>AtValue::None,
},
mouse_ev(Ev::MouseMove, |e| {
if e.buttons() != 0 {
Msg::Move([e.movement_x() as f64, e.movement_y() as f64])
} else {
Msg::Move([0., 0.])
}
}),
wheel_ev(Ev::Wheel, |event| {
let delta_y = event.delta_y();
(delta_y != 0.0).then(|| {
event.prevent_default();
let at = [event.offset_x(), event.offset_y()];
let delta_y = -delta_y / 1000.;
Msg::Zoom(delta_y, at)
})
}),
],
img![
el_ref(image_ref),
attrs! {
At::Src => url
},
style! {
St::Display => "none",
}
]
] ]
} }
fn view_data(data: &Data) -> Node<Msg> { fn view_data(
data: &Data,
image_canvas: &ElRef<HtmlCanvasElement>,
image_ref: &ElRef<HtmlImageElement>,
zoom: f64,
offset: [f64; 2],
) -> Node<Msg> {
let mut width = 128;
let mut height = 128;
if let Some(c) = image_canvas.get() {
width = c.width() as i32;
height = c.height() as i32;
}
let zoom_in = 0.1;
let zoom_out = -0.1;
div![ div![
C!["columns"], C!["columns"],
div![C!["column", "is-narrow"], view_metadata_table(data),], div![
C!["column", "is-narrow"],
view_metadata_table(data),
p![format!(
"Z: {:.4} Off: {:.2}x{:.2}",
zoom, offset[0], offset[1]
)],
p![format!("Mid {}x{}", width / 2, height / 2)],
p![format!("Max {}x{}", width, height)],
button![ev(Ev::Click, |_| Msg::Reset), "Reset",],
div![
button![
ev(Ev::Click, move |_| Msg::Zoom(zoom_in, [0, 0])),
"+ @ 0x0",
],
button![
ev(Ev::Click, move |_| Msg::Zoom(zoom_out, [0, 0])),
"- @ 0x0",
],
],
div![
button![
ev(Ev::Click, move |_| Msg::Zoom(
zoom_in,
[width / 2, height / 2]
)),
"+ @ mid",
],
button![
ev(Ev::Click, move |_| Msg::Zoom(
zoom_out,
[width / 2, height / 2]
)),
"- @ mid",
],
],
div![
button![
ev(Ev::Click, move |_| Msg::Zoom(zoom_in, [width, height])),
"+ @ max",
],
button![
ev(Ev::Click, move |_| Msg::Zoom(zoom_out, [width, height])),
"- @ max",
],
],
],
div![ div![
C!["column"], C!["column"],
data.image_metadata.iter().map(|im| view_image(im)) div![
C!["tabs"],
ul![data.image_metadata.iter().map(|im| li![a![&im.name]])]
],
data.image_metadata
.iter()
.nth(0)
.map(|im| view_image(im, image_canvas, image_ref))
] ]
] ]
} }
// `view` describes what to display. // `view` describes what to display.
fn view(model: &Model) -> Node<Msg> { fn view(model: &Model) -> Node<Msg> {
let error: Option<Node<Msg>> = if let Some(error) = &model.error {
Some(div![C!["error"], "Errors:", pre![error.to_string()]])
} else {
None
};
div![ div![
match &model.data { match &model.data {
Some(data) => view_data(data), Some(data) => view_data(
data,
&model.image_canvas,
&model.image_ref,
model.zoom,
model.offset
),
None => h1!["Loading...."], None => h1!["Loading...."],
}, },
"Data", error,
pre![format!("{:#?}", model.data)], div![
style! {
St::Display => "none",
},
"Data",
pre![format!("{:#?}", model.data)]
],
] ]
} }
@ -211,6 +447,13 @@ fn view(model: &Model) -> Node<Msg> {
// (This function is invoked by `init` function in `index.html`.) // (This function is invoked by `init` function in `index.html`.)
#[wasm_bindgen(start)] #[wasm_bindgen(start)]
pub fn start() { pub fn start() {
// This provides better error messages in debug mode.
// It's disabled in release mode so it doesn't bloat up the file size.
#[cfg(debug_assertions)]
console_error_panic_hook::set_once();
let lvl = Level::Info;
console_log::init_with_level(lvl).expect("failed to initialize console logging");
// Mount the `app` to the element with the `id` "app". // Mount the `app` to the element with the `id` "app".
App::start("app", init, update, view); App::start("app", init, update, view);
} }