Pseudo pseudorandom color picker

Cargo.toml

@@ -15,4 +15,4 @@ toml = "0.9.5"
 slint-build = "1.12.1"
 
 [profile.release]
-opt-level = "s"
+opt-level = 3

src/lib.rs

@@ -1,5 +1,5 @@
 use config::Config;
-use std::path::PathBuf;
+use std::{hash::{DefaultHasher, Hash, Hasher}, path::PathBuf};
 
 pub mod config;
 pub mod log;
@@ -13,3 +13,11 @@ pub fn load_config() -> Config {
     }
     Config::new(PathBuf::from("./config.toml"))
 }
+
+/// Get random-like color id in range 0..16 by computing string hash
+pub fn color_id_from_name(name: String) -> i32 {
+    let mut s = DefaultHasher::new();
+    name.hash(&mut s);
+    let hash = s.finish();
+    (hash.count_ones() / 4) as i32
+}

src/main.rs

@@ -3,7 +3,7 @@
 
 use std::{error::Error, rc::Rc, sync::{Arc, Mutex}};
 
-use aliveline::{config::Config, load_config, log::{Event, Log}};
+use aliveline::{color_id_from_name, config::Config, load_config, log::{Event, Log}};
 use chrono::{Datelike, Timelike};
 use slint::{Model, ModelRc, SharedString, ToSharedString, VecModel, Weak};
 use toml::value::{Date as TomlDate, Time};
@@ -22,7 +22,8 @@ impl From<Event> for TimelineEvent {
             start,
             duration: end - start,
             label: event.name.to_shared_string(),
-            finished: event.finished
+            finished: event.finished,
+            color_id: color_id_from_name(event.name)
         }
     }
 }
@@ -143,8 +144,9 @@ fn main() -> Result<(), Box<dyn Error>> {
             let event = TimelineEvent {
                 duration: 0,
                 finished: false,
-                label: event_name,
-                start: offset
+                label: event_name.clone(),
+                start: offset,
+                color_id: color_id_from_name(event_name.to_string())
             };
             
             {
@@ -177,8 +179,9 @@ fn main() -> Result<(), Box<dyn Error>> {
             let new_event = TimelineEvent { 
                 duration: offset - event.start,
                 finished: true,
-                label: event.label,
-                start: event.start
+                label: event.label.clone(),
+                start: event.start,
+                color_id: color_id_from_name(event.label.to_string())
             };
 
             {
@@ -215,7 +218,7 @@ fn main() -> Result<(), Box<dyn Error>> {
                 let maybe_unfinished_event = log_guard.events.iter().find(|event| !event.finished);
                 match maybe_unfinished_event {
                     Some(unfinished_event) => Some(Event::new(unfinished_event.name.clone(), 0, 0, false)),
-                    None => None
+                    _ => None
                 }
             };
 

ui/app-window.slint

@@ -31,7 +31,6 @@ export component AppWindow inherits Window {
     property<[string]> combo-spans: ["1 Hour", "4 Hours", "8 Hours", "24 Hours"];
 
     title: "Aliveline";
-
     TabWidget {
         Tab {
             title: "Record";

ui/record.slint

@@ -16,7 +16,6 @@ export component RecordWidget inherits VerticalBox {
     property<string> event-name: "";
     property<bool> minimized: false;
     property<int> combo-index: 0;
-
     tl := Timeline {
         preferred-height: 100%;
         updating: true;

ui/theme.slint

@@ -0,0 +1,43 @@
+export global Palette {
+    in-out property<color> background: gray;
+    in-out property<color> timeline: darkgray;
+    in-out property<color> background-text: black;
+    // Note: these colors were almost randomly picked
+    in-out property<[color]> event-colors: [
+        #97f9f9,
+        #a4def9,
+        #c1e0f7,
+        #cfbae1,
+        #c59fc9,
+        #4e3d42,
+        #c9d5b5,
+        #2d82b7,
+        #556f44,
+        #772e25,
+        #c44536,
+        #7c6a0a,
+        #babd8d,
+        #ffdac6,
+        #fa9500,
+        #eb6424
+    ];
+
+    in-out property <[color]> event-text: [
+        #000000,
+        #000000,
+        #000000,
+        #000000,
+        #000000,
+        #ffffff,
+        #000000,
+        #000000,
+        #000000,
+        #ffffff,
+        #000000,
+        #000000,
+        #000000,
+        #000000,
+        #000000,
+        #000000
+    ];
+}

ui/timeline.slint

@@ -1,8 +1,11 @@
+import { Palette } from "theme.slint";
+
 export struct TimelineEvent {
     start: int,
     duration: int,
     finished: bool,
-    label: string
+    label: string,
+    color-id: int
 }
 
 global TimeString {
@@ -26,6 +29,7 @@ global TimeString {
 export component Timeline inherits Rectangle {
     callback new-day-started;
     callback clicked <=> ta.clicked;
+    background: Palette.background;
 
     in-out property<bool> updating: true;
     in-out property<[TimelineEvent]> events: [];
@@ -52,7 +56,6 @@ export component Timeline inherits Rectangle {
         preferred-height: 100%;
     }
 
-    background: gray;
     border-width: 1px;
     border-color: black;
     Rectangle {
@@ -63,19 +66,21 @@ export component Timeline inherits Rectangle {
         height: parent.height / 2;
         border-color: black;
         border-width: 1px;
-        background: purple;
+        background: Palette.timeline;
     }
 
     Text {
         x: 0;
         y: parent.height - self.height;
         text: TimeString.from(visible-offset - visible-time);
+        color: Palette.background-text;
     }
 
     Text {
         x: parent.width - self.width;
         y: parent.height - self.height;
         text: TimeString.from(visible-offset);
+        color: Palette.background-text;
     }
 
     for event in events: timeline-event := Rectangle {
@@ -91,13 +96,14 @@ export component Timeline inherits Rectangle {
         visible: self.width > 0 && self.real-x < parent.width;
         border-color: black;
         border-width: 1px;
-        background: red;
+        background: Palette.event-colors[event.color-id];
 
         Text {
             x: 0;
             y: -self.height;
             text: event.label;
             visible: timeline-event.visible;
+            color: Palette.background-text;
         }
         start-txt := Text {
             x: 0;
@@ -108,6 +114,7 @@ export component Timeline inherits Rectangle {
             visible: timeline-event.visible &&
                 (self.width * 2 < timeline-event.width ||
                     (!end-txt.visible && self.width < timeline-event.width));
+            color: Palette.event-text[event.color-id];
         }
         end-txt := Text {
             x: timeline-event.width - self.width;
@@ -116,6 +123,7 @@ export component Timeline inherits Rectangle {
                 TimeString.from(event.start + event.duration) :
                 TimeString.from(visible-offset);
             visible: timeline-event.visible && timeline-event.width - self.width * 2 > 0;
+            color: Palette.event-text[event.color-id];
         }
     }
     @children