From add88fcf53d704e396ed550fee502081578c2929 Mon Sep 17 00:00:00 2001
From: Tim Culverhouse <tim@timculverhouse.com>
Date: Tue, 31 Dec 2024 10:21:40 -0600
Subject: [PATCH] vxfw(Spinner): redraw after last spin

---
 src/vxfw/Spinner.zig | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/vxfw/Spinner.zig b/src/vxfw/Spinner.zig
index 4e03ffa..514de11 100644
--- a/src/vxfw/Spinner.zig
+++ b/src/vxfw/Spinner.zig
@@ -15,6 +15,10 @@ style: vaxis.Style = .{},
 /// The frame index
 frame: u4 = 0,
 
+/// If the last time we handled a tick we were spinning. This is used to draw one time after we stop
+/// spinning
+was_spinning: bool = false,
+
 /// Start, or add one, to the spinner counter. Thread safe.
 pub fn start(self: *Spinner) ?vxfw.Command {
     const count = self.count.fetchAdd(1, .monotonic);
@@ -24,6 +28,10 @@ pub fn start(self: *Spinner) ?vxfw.Command {
     return null;
 }
 
+pub fn isSpinning(self: *Spinner) bool {
+    return self.count.load(.unordered) > 0;
+}
+
 /// Reduce one from the spinner counter. The spinner will stop when it reaches 0. Thread safe
 pub fn stop(self: *Spinner) void {
     self.count.store(self.count.load(.unordered) -| 1, .unordered);
@@ -47,7 +55,14 @@ pub fn handleEvent(self: *Spinner, ctx: *vxfw.EventContext, event: vxfw.Event) A
         .tick => {
             const count = self.count.load(.unordered);
 
-            if (count == 0) return;
+            if (count == 0) {
+                if (self.was_spinning) {
+                    ctx.redraw = true;
+                    self.was_spinning = false;
+                }
+                return;
+            }
+            self.was_spinning = true;
             // Update frame
             self.frame += 1;
             if (self.frame >= frames.len) self.frame = 0;