From 9389978152ae4d8939cc2fda7a1cb0c772fcb7b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20Can=20Karag=C3=B6z?= <m.cankaragoz@outlook.com>
Date: Wed, 29 Oct 2025 00:33:37 +0300
Subject: [PATCH] DateWheelPicker: Add MinDate and MaxDate

---
 .../wwwroot/CodeBeam.MudBlazor.Extensions.xml | 10 +++
 .../DateWheelPicker/DateWheelPickerPage.razor |  3 +
 .../Examples/DateWheelPickerExample2.razor    | 23 +++++
 .../DateWheelPicker/MudDateWheelPicker.razor  |  8 +-
 .../MudDateWheelPicker.razor.cs               | 84 ++++++++++++++++---
 5 files changed, 112 insertions(+), 16 deletions(-)
 create mode 100644 CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/Examples/DateWheelPickerExample2.razor

diff --git a/CodeBeam.MudBlazor.Extensions.Docs.Wasm/wwwroot/CodeBeam.MudBlazor.Extensions.xml b/CodeBeam.MudBlazor.Extensions.Docs.Wasm/wwwroot/CodeBeam.MudBlazor.Extensions.xml
index 2a4b9d13..d0f56c68 100644
--- a/CodeBeam.MudBlazor.Extensions.Docs.Wasm/wwwroot/CodeBeam.MudBlazor.Extensions.xml
+++ b/CodeBeam.MudBlazor.Extensions.Docs.Wasm/wwwroot/CodeBeam.MudBlazor.Extensions.xml
@@ -1915,6 +1915,16 @@
             The minimum swipe delta to change wheel value on touch devices. Default is 30.
             </summary>
         </member>
+        <member name="P:MudExtensions.MudDateWheelPicker.MinDate">
+            <summary>
+            The minimum selectable date.
+            </summary>
+        </member>
+        <member name="P:MudExtensions.MudDateWheelPicker.MaxDate">
+            <summary>
+            The maximum selectable date.
+            </summary>
+        </member>
         <member name="P:MudExtensions.MudDateWheelPicker.FixYear">
             <summary>
             If true, the year wheel is disabled.
diff --git a/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/DateWheelPickerPage.razor b/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/DateWheelPickerPage.razor
index ad170317..7cebca63 100644
--- a/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/DateWheelPickerPage.razor
+++ b/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/DateWheelPickerPage.razor
@@ -5,4 +5,7 @@
     <ExampleCard ComponentName="DateWheelPicker" ExampleName="DateWheelPickerExample1" Title="Usage" Description="MudDateWheel automatically converts wheel values to DateTime?.">
         <DateWheelPickerExample1 />
     </ExampleCard>
+    <ExampleCard ComponentName="DateWheelPicker" ExampleName="DateWheelPickerExample2" Title="MinDate & MaxDate" Description="You can restrict available date with MinDate and MaxDate parameters.">
+        <DateWheelPickerExample2 />
+    </ExampleCard>
 </ExamplePage>
diff --git a/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/Examples/DateWheelPickerExample2.razor b/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/Examples/DateWheelPickerExample2.razor
new file mode 100644
index 00000000..71c8d73e
--- /dev/null
+++ b/CodeBeam.MudBlazor.Extensions.Docs/Pages/Components/DateWheelPicker/Examples/DateWheelPickerExample2.razor
@@ -0,0 +1,23 @@
+@namespace MudExtensions.Docs.Examples
+@using MudBlazor.Extensions
+
+<MudGrid>
+    <MudItem xs="12" sm="8">
+        <MudDateWheelPicker @bind-Value="_date" Label="Date" Clearable
+        TransformOrigin="Origin.TopCenter" AnchorOrigin="Origin.BottomCenter" MinDate="@_minDate" MaxDate="@_maxDate" />
+    </MudItem>
+
+    <MudItem xs="12" sm="4">
+        <MudStack Spacing="4">
+            <MudDatePicker @bind-Date="@_minDate" Label="Min Date" Variant="Variant.Outlined" />
+            <MudDatePicker @bind-Date="@_maxDate" Label="Max Date" Variant="Variant.Outlined" />
+            <MudButton OnClick="@(() => _date = DateTime.Now)">Set Today</MudButton>
+        </MudStack>
+    </MudItem>
+</MudGrid>
+
+@code {
+    DateTime? _date = DateTime.Now;
+    DateTime? _minDate = DateTime.Now;
+    DateTime? _maxDate = DateTime.Now.AddYears(3);
+}
diff --git a/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor b/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor
index bf79ab99..4f33f99d 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor
+++ b/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor
@@ -37,9 +37,9 @@
                         {
                             string dateFormat = new string(DateFormat);
 
-                            while (dateFormat.Length > 0)
+                            foreach (var ch in dateFormat.Distinct())
                             {
-                                switch (dateFormat[0])
+                                switch (ch)
                                 {
                                     case 'd':
                                         <MudWheel Class="mud-width-full" @bind-Value="_day" ItemCollection="Days" Sensitivity="@Sensitivity" Label="@(ShowHeader ? LocalizedStrings.Day : null)" ToStringFunc="new Func<int, string>(NumberToString)" Dense="@Dense" Color="@Color" Disabled="FixDay" />
@@ -48,11 +48,9 @@
                                         <MudWheel Class="mud-width-full" Value="_month" ValueChanged=@((int m) => OnMonthChanged(m)) ItemCollection="Months" Sensitivity="@Sensitivity" Label="@(ShowHeader ? LocalizedStrings.Month : null)" ToStringFunc="new Func<int, string>(NumberToString)" Dense="@Dense" Color="@Color" Disabled="FixMonth" />
                                         break;
                                     case 'y':
-                                        <MudWheel Class="mud-width-full" @bind-Value="_year" ItemCollection="Years" Sensitivity="@Sensitivity" Label="@(ShowHeader ? LocalizedStrings.Year : null)" Dense="@Dense" Color="@Color" Disabled="FixYear" />
+                                        <MudWheel Class="mud-width-full" @bind-Value:get="_year" @bind-Value:set="@((int y) => OnYearChanged(y))" ItemCollection="Years" Sensitivity="@Sensitivity" Label="@(ShowHeader ? LocalizedStrings.Year : null)" Dense="@Dense" Color="@Color" Disabled="FixYear" />
                                         break;
                                 }
-
-                                dateFormat = dateFormat.Replace(dateFormat[0].ToString(), string.Empty);
                             }
                         }
                         @if (DateView == DateView.Time || DateView == DateView.Both)
diff --git a/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor.cs b/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor.cs
index 8b52d852..063bfd78 100644
--- a/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor.cs
+++ b/CodeBeam.MudBlazor.Extensions/Components/DateWheelPicker/MudDateWheelPicker.razor.cs
@@ -73,6 +73,20 @@ protected override void OnInitialized()
         [Parameter]
         public int Sensitivity { get; set; } = 30;
 
+        /// <summary>
+        /// The minimum selectable date.
+        /// </summary>
+        [Parameter]
+        [Category(CategoryTypes.FormComponent.Behavior)]
+        public DateTime? MinDate { get; set; }
+
+        /// <summary>
+        /// The maximum selectable date.
+        /// </summary>
+        [Parameter]
+        [Category(CategoryTypes.FormComponent.Behavior)]
+        public DateTime? MaxDate { get; set; }
+
         /// <summary>
         /// If true, the year wheel is disabled.
         /// </summary>
@@ -392,23 +406,65 @@ protected void ToggleDateView()
 
         private void RefreshDays()
         {
-            var month = _month;
-            var year = _year;
-            var day = _day;
+            var years = Enumerable.Range(1, 9999).ToList();
+
+            if (MinDate.HasValue)
+                years = years.Where(y => y >= MinDate.Value.Year).ToList();
+
+            if (MaxDate.HasValue)
+                years = years.Where(y => y <= MaxDate.Value.Year).ToList();
+
+            Years = years;
+
+            if (_year < Years.First())
+                _year = Years.First();
+            else if (_year > Years.Last())
+                _year = Years.Last();
+
+            var months = Enumerable.Range(1, 12).ToList();
+
+            if (MinDate.HasValue && _year == MinDate.Value.Year)
+                months = months.Where(m => m >= MinDate.Value.Month).ToList();
+
+            if (MaxDate.HasValue && _year == MaxDate.Value.Year)
+                months = months.Where(m => m <= MaxDate.Value.Month).ToList();
 
-            ++month;
+            Months = months;
 
-            if (month == 13)
+            if (_month < Months.First())
+                _month = Months.First();
+            else if (_month > Months.Last())
+                _month = Months.Last();
+
+            int maxDay;
+            try
             {
-                month = 1;
-                ++year;
+                var nextMonth = _month == 12 ? 1 : _month + 1;
+                var nextYear = _month == 12 ? _year + 1 : _year;
+                maxDay = new DateTime(nextYear, nextMonth, 1).AddDays(-1).Day;
             }
-
-            Days = Enumerable.Range(1, new DateTime(year, month, 1).AddDays(-1).Day).ToList();
-            if (Days.Last() < _day)
+            catch
             {
-                _day = Days.Last();
+                Days = new();
+                return;
             }
+
+            var days = Enumerable.Range(1, maxDay).ToList();
+
+            if (MinDate.HasValue && _year == MinDate.Value.Year && _month == MinDate.Value.Month)
+                days = days.Where(d => d >= MinDate.Value.Day).ToList();
+
+            if (MaxDate.HasValue && _year == MaxDate.Value.Year && _month == MaxDate.Value.Month)
+                days = days.Where(d => d <= MaxDate.Value.Day).ToList();
+
+            Days = days;
+
+            if (Days.Count == 0)
+                _day = 1;
+            else if (_day < Days.First())
+                _day = Days.First();
+            else if (_day > Days.Last())
+                _day = Days.Last();
         }
 
         private void OnMonthChanged(int month)
@@ -418,6 +474,12 @@ private void OnMonthChanged(int month)
             RefreshDays();
         }
 
+        private void OnYearChanged(int year)
+        {
+            _year = year;
+            RefreshDays();
+        }
+
         /// <summary>
         /// 
         /// </summary>