From 378c5b020080f8c7c1eef40a8520203e05ed8142 Mon Sep 17 00:00:00 2001
From: rabbitism <popmessiah@hotmail.com>
Date: Sat, 10 Aug 2024 13:37:35 +0800
Subject: [PATCH] fix: make sure page count is properly calculated even if
 template is not loaded.

---
 demo/Ursa.Demo/Pages/PaginationDemo.axaml  |  3 ++-
 src/Ursa/Controls/Pagination/Pagination.cs | 16 ++++++++++------
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/demo/Ursa.Demo/Pages/PaginationDemo.axaml b/demo/Ursa.Demo/Pages/PaginationDemo.axaml
index 458a2e4..22d4ebc 100644
--- a/demo/Ursa.Demo/Pages/PaginationDemo.axaml
+++ b/demo/Ursa.Demo/Pages/PaginationDemo.axaml
@@ -30,7 +30,8 @@
             TotalCount="600" />
         
         <TextBlock Text="Tiny Pagination"/>
-        <u:Pagination Theme="{DynamicResource TinyPagination}" TotalCount="100" PageSize="1"/>
+        <u:Pagination Theme="{DynamicResource TinyPagination}" Command="{Binding LoadPageCommand}"
+                      CommandParameter="{Binding $self.CurrentPage}" PageSize="1"   TotalCount="100" />
         <u:Pagination Classes="ReadOnly" Theme="{DynamicResource TinyPagination}" TotalCount="100" PageSize="1"/>
     </StackPanel>
 </UserControl>
diff --git a/src/Ursa/Controls/Pagination/Pagination.cs b/src/Ursa/Controls/Pagination/Pagination.cs
index 0b5a9ae..4fa4c15 100644
--- a/src/Ursa/Controls/Pagination/Pagination.cs
+++ b/src/Ursa/Controls/Pagination/Pagination.cs
@@ -114,8 +114,9 @@ public class Pagination: TemplatedControl
 
     private int _pageCount;
 
-    public static readonly DirectProperty<Pagination, int> PageCountProperty = AvaloniaProperty.RegisterDirect<Pagination, int>(
-        nameof(PageCount), o => o.PageCount);
+    public static readonly DirectProperty<Pagination, int> PageCountProperty =
+        AvaloniaProperty.RegisterDirect<Pagination, int>(
+            nameof(PageCount), o => o.PageCount, (o, e) => o.PageCount = e);
 
     /// <summary>
     /// Page count.
@@ -291,11 +292,14 @@ public class Pagination: TemplatedControl
     /// <param name="page"></param>
     private void UpdateButtonsByCurrentPage(int? page)
     {
-        if (_buttonPanel is null) return;
         if (PageSize == 0) return;
-
-        int? currentPage = CurrentPage;
         int pageCount = TotalCount / PageSize;
+        if (_buttonPanel is null)
+        {
+            SetCurrentValue(PageCountProperty, pageCount);
+            return;
+        }
+        int? currentPage = CurrentPage;
         int residue = TotalCount % PageSize;
         if (residue > 0)
         {
@@ -360,7 +364,7 @@ public class Pagination: TemplatedControl
             }
         }
 
-        PageCount = pageCount;
+        SetCurrentValue(PageCountProperty, pageCount);
         SetCurrentValue(CurrentPageProperty, currentPage);
         if (_previousButton != null) _previousButton.IsEnabled = (CurrentPage ?? int.MaxValue) > 1;
         if (_nextButton != null) _nextButton.IsEnabled = (CurrentPage ?? 0) < PageCount;