wip: two buttons

Cargo.lock

@@ -2,6 +2,21 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.4.0"
@@ -14,6 +29,12 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f68f53c83ab957f72c32642f3868eec03eb974d1fb82e453128456482613d36"
 
+[[package]]
+name = "bumpalo"
+version = "3.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
+
 [[package]]
 name = "cairo-rs"
 version = "0.20.7"
@@ -37,6 +58,15 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "cc"
+version = "1.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7777341816418c02e033934a09f20dc0ccaf65a5201ef8a450ae0105a573fda"
+dependencies = [
+ "shlex",
+]
+
 [[package]]
 name = "cfg-expr"
 version = "0.17.2"
@@ -47,6 +77,32 @@ dependencies = [
  "target-lexicon",
 ]
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "chrono"
+version = "0.4.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e36cc9d416881d2e24f9a963be5fb1cd90966419ac844274161d10488b3e825"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
+ "num-traits",
+ "wasm-bindgen",
+ "windows-targets",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -386,6 +442,29 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.61"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "235e081f3925a06703c2d0117ea8b91f042756fd6e7a6e5d901e8ca1a996b220"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows-core",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.7.1"
@@ -396,12 +475,28 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "js-sys"
+version = "0.3.77"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1cfaf33c695fc6e08064efbc1f72ec937429614f25eef83af942d0e227c3a28f"
+dependencies = [
+ "once_cell",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.169"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5aba8db14291edd000dfcc4d620c7ebfb122c613afb886ca8803fa4e128a20a"
 
+[[package]]
+name = "log"
+version = "0.4.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04cbf5b083de1c7e0222a7a51dbfdba1cbe1c6ab0b15e29fff3f6c077fd9cd9f"
+
 [[package]]
 name = "memchr"
 version = "2.7.4"
@@ -417,6 +512,21 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.20.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "945462a4b81e43c4e3ba96bd7b49d834c6f61198356aa858733bc4acf3cbe62e"
+
 [[package]]
 name = "pango"
 version = "0.20.7"
@@ -445,6 +555,7 @@ dependencies = [
 name = "pdt"
 version = "0.1.0"
 dependencies = [
+ "chrono",
  "gtk4",
 ]
 
@@ -502,6 +613,12 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7c45b9784283f1b2e7fb61b42047c2fd678ef0960d4f6f1eba131594cc369d4"
+
 [[package]]
 name = "semver"
 version = "1.0.25"
@@ -537,6 +654,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -628,6 +751,73 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "852e951cb7832cb45cb1169900d19760cfa39b82bc0ea9c0e5a14ae88411c98b"
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "rustversion",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
+dependencies = [
+ "bumpalo",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "windows-core"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+dependencies = [
+ "windows-targets",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.59.0"

Cargo.toml

@@ -5,3 +5,4 @@ edition = "2021"
 
 [dependencies]
 gtk4 = "0.9.5"
+chrono = "0.4.39"

src/main.rs

@@ -1,4 +1,6 @@
-// Example copied from https://crates.io/crates/gtk4
+// Based on example from https://crates.io/crates/gtk4
+
+use chrono::Local;
 
 use gtk4 as gtk;
 use gtk::prelude::*;
@@ -9,22 +11,45 @@ fn main() -> glib::ExitCode {
         .application_id("de.privacy1st.pdt")
         .build();
 
-    application.connect_activate(|app| {
+    application.connect_activate(build_ui);
-        let window = ApplicationWindow::builder()
-            .application(app)
-            .title("PleaseDisturbTimer")
-            .default_width(350)
-            .default_height(70)
-            .build();
-
-        let button_start = Button::with_label("Start");
-        button_start.connect_clicked(|_| {
-            eprintln!("Timer started.");
-        });
-        window.set_child(Some(&button_start));
-
-        window.present();
-    });
 
     application.run()
 }
+
+fn build_ui(app: &gtk::Application) {
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("PleaseDisturbTimer")
+        .default_width(350)
+        .default_height(70)
+        .build();
+
+    let button_start = Button::with_label("Start");
+    button_start.connect_clicked(|_| {
+        eprintln!("Timer started.");
+    });
+    window.set_child(Some(&button_start));
+
+    let time = current_time();
+    let label = gtk::Label::default();
+    label.set_text(&time);
+    // label.set_halign(gtk::Align::Center);
+    window.set_child(Some(&label));
+
+    window.present();
+
+    // we are using a closure to capture the label (else we could also use a normal function)
+    let tick = move || {
+        let time = current_time();
+        label.set_text(&time);
+        // we could return glib::ControlFlow::Break to stop our clock after this tick
+        glib::ControlFlow::Continue
+    };
+
+    // executes the closure once every second
+    glib::timeout_add_seconds_local(1, tick);
+}
+
+fn current_time() -> String {
+    format!("{}", Local::now().format("%Y-%m-%d %H:%M:%S"))
+}