From d9a161d00bf8dc8865ba08f928a4743c29a09414 Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Sat, 2 Jan 2021 02:50:01 -0500
Subject: [PATCH 1/2] Add HorizontalContentAlignment/VerticalContentAlignment
 props to NumericUpDown

---
 .../NumericUpDown/NumericUpDown.cs            | 33 +++++++++++++++++++
 .../NumericUpDown.xaml                        |  4 ++-
 .../Controls/NumericUpDown.xaml               |  7 ++--
 3 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs b/src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs
index aae041071d..b6b71644a3 100644
--- a/src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs
+++ b/src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs
@@ -6,6 +6,7 @@ using Avalonia.Controls.Primitives;
 using Avalonia.Data;
 using Avalonia.Input;
 using Avalonia.Interactivity;
+using Avalonia.Layout;
 using Avalonia.Threading;
 using Avalonia.Utilities;
 
@@ -105,6 +106,19 @@ namespace Avalonia.Controls
         public static readonly StyledProperty<string> WatermarkProperty =
             AvaloniaProperty.Register<NumericUpDown, string>(nameof(Watermark));
 
+
+        /// <summary>
+        /// Defines the <see cref="HorizontalContentAlignment"/> property.
+        /// </summary>
+        public static readonly StyledProperty<HorizontalAlignment> HorizontalContentAlignmentProperty =
+            ContentControl.HorizontalContentAlignmentProperty.AddOwner<NumericUpDown>();
+
+        /// <summary>
+        /// Defines the <see cref="VerticalContentAlignment"/> property.
+        /// </summary>
+        public static readonly StyledProperty<VerticalAlignment> VerticalContentAlignmentProperty =
+            ContentControl.VerticalContentAlignmentProperty.AddOwner<NumericUpDown>();
+
         private IDisposable _textBoxTextChangedSubscription;
 
         private double _value;
@@ -256,6 +270,25 @@ namespace Avalonia.Controls
             set { SetValue(WatermarkProperty, value); }
         }
 
+
+        /// <summary>
+        /// Gets or sets the horizontal alignment of the content within the control.
+        /// </summary>
+        public HorizontalAlignment HorizontalContentAlignment
+        {
+            get => GetValue(HorizontalContentAlignmentProperty);
+            set => SetValue(HorizontalContentAlignmentProperty, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the vertical alignment of the content within the control.
+        /// </summary>
+        public VerticalAlignment VerticalContentAlignment
+        {
+            get => GetValue(VerticalContentAlignmentProperty);
+            set => SetValue(VerticalContentAlignmentProperty, value);
+        }
+
         /// <summary>
         /// Initializes new instance of <see cref="NumericUpDown"/> class.
         /// </summary>
diff --git a/src/Avalonia.Themes.Default/NumericUpDown.xaml b/src/Avalonia.Themes.Default/NumericUpDown.xaml
index 24cbb62908..025e822404 100644
--- a/src/Avalonia.Themes.Default/NumericUpDown.xaml
+++ b/src/Avalonia.Themes.Default/NumericUpDown.xaml
@@ -23,6 +23,8 @@
                    Watermark="{TemplateBinding Watermark}"
                    DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
                    IsReadOnly="{TemplateBinding IsReadOnly}"
+                   VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                   HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                    Text="{TemplateBinding Text}"
                    AcceptsReturn="False"
                    TextWrapping="NoWrap">
@@ -35,4 +37,4 @@
     <Setter Property="Margin" Value="4"/>
     <Setter Property="MinWidth" Value="20"/>
   </Style>
-</Styles>
\ No newline at end of file
+</Styles>
diff --git a/src/Avalonia.Themes.Fluent/Controls/NumericUpDown.xaml b/src/Avalonia.Themes.Fluent/Controls/NumericUpDown.xaml
index 1da48ebd8a..288b3ccee6 100644
--- a/src/Avalonia.Themes.Fluent/Controls/NumericUpDown.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/NumericUpDown.xaml
@@ -1,8 +1,7 @@
 <Styles xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <Design.PreviewWith>
-    <Border Padding="20"
-            Background="Black">
+    <Border Padding="20">
       <StackPanel Spacing="20">
         <NumericUpDown Minimum="0"
                        Maximum="10"
@@ -13,6 +12,8 @@
                        Maximum="10"
                        Increment="0.5"
                        Width="150"
+                       VerticalContentAlignment="Center"
+                       HorizontalContentAlignment="Center"
                        ButtonSpinnerLocation="Left"
                        Watermark="Enter text" />
       </StackPanel>
@@ -48,6 +49,8 @@
                    Padding="{TemplateBinding Padding}"
                    Watermark="{TemplateBinding Watermark}"
                    IsReadOnly="{TemplateBinding IsReadOnly}"
+                   VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                   HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                    Text="{TemplateBinding Text}"
                    AcceptsReturn="False"
                    TextWrapping="NoWrap" />

From 107b4d83fdc026dcfc3fe692c8ae683341b11126 Mon Sep 17 00:00:00 2001
From: Max Katz <maxkatz6@outlook.com>
Date: Sat, 2 Jan 2021 02:50:10 -0500
Subject: [PATCH 2/2] Add HorizontalContentAlignment/VerticalContentAlignment
 props to CalendarDatePicker

---
 .../Calendar/CalendarDatePicker.cs            | 32 +++++++++++++++++++
 .../CalendarDatePicker.xaml                   |  2 ++
 .../Controls/CalendarDatePicker.xaml          |  8 +++--
 3 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Controls/Calendar/CalendarDatePicker.cs b/src/Avalonia.Controls/Calendar/CalendarDatePicker.cs
index 7c259f0a09..af3fdbd662 100644
--- a/src/Avalonia.Controls/Calendar/CalendarDatePicker.cs
+++ b/src/Avalonia.Controls/Calendar/CalendarDatePicker.cs
@@ -11,6 +11,7 @@ using Avalonia.Controls.Primitives;
 using Avalonia.Data;
 using Avalonia.Input;
 using Avalonia.Interactivity;
+using Avalonia.Layout;
 
 namespace Avalonia.Controls
 {
@@ -209,6 +210,18 @@ namespace Avalonia.Controls
             TextBox.UseFloatingWatermarkProperty.AddOwner<CalendarDatePicker>();
 
 
+        /// <summary>
+        /// Defines the <see cref="HorizontalContentAlignment"/> property.
+        /// </summary>
+        public static readonly StyledProperty<HorizontalAlignment> HorizontalContentAlignmentProperty =
+            ContentControl.HorizontalContentAlignmentProperty.AddOwner<CalendarDatePicker>();
+
+        /// <summary>
+        /// Defines the <see cref="VerticalContentAlignment"/> property.
+        /// </summary>
+        public static readonly StyledProperty<VerticalAlignment> VerticalContentAlignmentProperty =
+            ContentControl.VerticalContentAlignmentProperty.AddOwner<CalendarDatePicker>();
+
         /// <summary>
         /// Gets or sets the date to display.
         /// </summary>
@@ -364,6 +377,25 @@ namespace Avalonia.Controls
             set { SetValue(UseFloatingWatermarkProperty, value); }
         }
 
+
+        /// <summary>
+        /// Gets or sets the horizontal alignment of the content within the control.
+        /// </summary>
+        public HorizontalAlignment HorizontalContentAlignment
+        {
+            get => GetValue(HorizontalContentAlignmentProperty);
+            set => SetValue(HorizontalContentAlignmentProperty, value);
+        }
+
+        /// <summary>
+        /// Gets or sets the vertical alignment of the content within the control.
+        /// </summary>
+        public VerticalAlignment VerticalContentAlignment
+        {
+            get => GetValue(VerticalContentAlignmentProperty);
+            set => SetValue(VerticalContentAlignmentProperty, value);
+        }
+
         /// <summary>
         /// Occurs when the drop-down
         /// <see cref="T:Avalonia.Controls.Calendar" /> is closed.
diff --git a/src/Avalonia.Themes.Default/CalendarDatePicker.xaml b/src/Avalonia.Themes.Default/CalendarDatePicker.xaml
index bc1aba1a03..aab7d06c46 100644
--- a/src/Avalonia.Themes.Default/CalendarDatePicker.xaml
+++ b/src/Avalonia.Themes.Default/CalendarDatePicker.xaml
@@ -93,6 +93,8 @@
                    Watermark="{TemplateBinding Watermark}"
                    UseFloatingWatermark="{TemplateBinding UseFloatingWatermark}"
                    DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
+                   VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                   HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                    Grid.Column="0"/>
 
           <Button Name="PART_Button"
diff --git a/src/Avalonia.Themes.Fluent/Controls/CalendarDatePicker.xaml b/src/Avalonia.Themes.Fluent/Controls/CalendarDatePicker.xaml
index 75343ebb4a..c902e371fb 100644
--- a/src/Avalonia.Themes.Fluent/Controls/CalendarDatePicker.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/CalendarDatePicker.xaml
@@ -9,8 +9,10 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:sys="clr-namespace:System;assembly=netstandard">
   <Design.PreviewWith>
-    <Border Margin="20">
-      <CalendarDatePicker/>
+    <Border Margin="20, 20, 20, 200">
+      <CalendarDatePicker Width="200"
+                          VerticalContentAlignment="Center"
+                          HorizontalContentAlignment="Center" />
     </Border>
   </Design.PreviewWith>
 
@@ -104,6 +106,8 @@
                    Watermark="{TemplateBinding Watermark}"
                    UseFloatingWatermark="{TemplateBinding UseFloatingWatermark}"
                    DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
+                   VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                   HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                    Grid.Column="0"/>
 
           <Button Name="PART_Button"