From cb0ce5a7e73080c265f598f42a4cc19d756dabbc Mon Sep 17 00:00:00 2001
From: darkfi <darkfi@darkfi>
Date: Sat, 3 Aug 2024 12:28:06 +0200
Subject: [PATCH] wallet: chatview touch finger scroll accel/decel

---
 bin/darkwallet/src/main.rs        | 1 +
 bin/darkwallet/src/ui/chatview.rs | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/bin/darkwallet/src/main.rs b/bin/darkwallet/src/main.rs
index 42192620b..d619b740a 100644
--- a/bin/darkwallet/src/main.rs
+++ b/bin/darkwallet/src/main.rs
@@ -18,6 +18,7 @@
 
 #![feature(deadline_api)]
 #![feature(str_split_whitespace_remainder)]
+#![feature(duration_millis_float)]
 
 // Use these to incrementally fix warnings with cargo fix
 //#![allow(warnings, unused)]
diff --git a/bin/darkwallet/src/ui/chatview.rs b/bin/darkwallet/src/ui/chatview.rs
index ece2ede71..7c615721d 100644
--- a/bin/darkwallet/src/ui/chatview.rs
+++ b/bin/darkwallet/src/ui/chatview.rs
@@ -203,6 +203,7 @@ fn select_nick_color(nick: &str, nick_colors: &[Color]) -> Color {
     color
 }
 
+#[derive(Clone)]
 struct TouchInfo {
     start_scroll: f32,
     start_y: f32,
@@ -567,6 +568,14 @@ impl ChatView {
             }
             TouchPhase::Ended => {
                 // Now calculate scroll acceleration
+                let touch_info = self.touch_info.lock().unwrap().clone();
+
+                let time = touch_info.start_instant.elapsed().as_millis_f32();
+                let dist = touch_y - touch_info.start_y;
+
+                let accel = self.mouse_scroll_start_accel.get() * dist / time;
+                self.accel.fetch_add(accel, Ordering::Relaxed);
+                self.motion_cv.notify();
             }
             TouchPhase::Cancelled => {}
         }