From 4fd1f4935c2baeb0214772ad3f82430bd1bee56e Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Sun, 28 Jul 2024 23:02:15 +0200
Subject: [PATCH] feat: start work on makeing filelist_view scrollable

---
 src/tui/filelist_view.zig | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/tui/filelist_view.zig b/src/tui/filelist_view.zig
index 4ca0a54..87c8462 100644
--- a/src/tui/filelist_view.zig
+++ b/src/tui/filelist_view.zig
@@ -34,7 +34,7 @@ commands: Commands = undefined,
 
 items: usize = 0,
 view_pos: usize = 0,
-total_items: usize = 0,
+view_rows: usize = 0,
 entries: std.ArrayList(Entry) = undefined,
 
 const Entry = struct {
@@ -73,6 +73,8 @@ pub fn handle_resize(self: *Self, pos: Widget.Box) void {
     self.plane.move_yx(@intCast(pos.y), @intCast(pos.x)) catch return;
     self.plane.resize_simple(@intCast(pos.h), @intCast(pos.w)) catch return;
     self.menu.resize(pos);
+    self.view_rows = pos.h;
+    self.update_scrollbar();
 }
 
 pub fn walk(self: *Self, walk_ctx: *anyopaque, f: Widget.WalkFn, w: *Widget) bool {
@@ -91,6 +93,7 @@ pub fn add_item(self: *Self, entry_: Entry) !void {
     cbor.writeValue(writer, idx) catch return;
     self.menu.add_item_with_handler(label.items, handle_menu_action) catch return;
     self.menu.resize(Widget.Box.from(self.plane));
+    self.update_scrollbar();
 }
 
 pub fn reset(self: *Self) void {
@@ -146,6 +149,10 @@ fn handle_scroll(self: *Self, _: tp.pid_ref, m: tp.message) error{Exit}!void {
     _ = try m.match(.{ "scroll_to", tp.extract(&self.view_pos) });
 }
 
+fn update_scrollbar(self: *Self) void {
+    self.menu.scrollbar.?.set(@intCast(self.entries.items.len), @intCast(self.view_rows), @intCast(self.view_pos));
+}
+
 fn handle_menu_action(menu: **Menu.State(*Self), button: *Button.State(*Menu.State(*Self))) void {
     const self = menu.*.opts.ctx;
     var idx: usize = undefined;