From 8230c8ec248152474f97f6955fc38e9c168682f9 Mon Sep 17 00:00:00 2001
From: rabbitism <popmessiah@hotmail.com>
Date: Mon, 15 Jan 2024 00:07:09 +0800
Subject: [PATCH] feat: Add Clear.

---
 demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml  |  2 +-
 .../Controls/NumericUpDown.axaml              | 38 +++++++++++++++++++
 .../NumericUpDown/NumericUpDownBase.cs        |  7 ++++
 3 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml b/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
index 33d5bf7..f13dadd 100644
--- a/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
+++ b/demo/Ursa.Demo/Pages/NumericUpDownDemo.axaml
@@ -14,7 +14,7 @@
         </Style>
     </UserControl.Styles>
     <StackPanel HorizontalAlignment="Left">
-        <u:NumericIntUpDown Name="input" Step="1" Value="2" Watermark="Input Value" IsReadOnly="True" />
+        <u:NumericIntUpDown Name="input" Step="1" Value="2" Watermark="Input Value" Classes="ClearButton" />
         <TextBlock Text="{Binding #input.Value}" ></TextBlock>
         <u:NumericDoubleUpDown Name="inputDouble" Step="0.5" Value="3.1" EmptyInputValue="1"></u:NumericDoubleUpDown>
         <TextBlock Text="{Binding #inputDouble.Value}"></TextBlock>
diff --git a/src/Ursa.Themes.Semi/Controls/NumericUpDown.axaml b/src/Ursa.Themes.Semi/Controls/NumericUpDown.axaml
index 499de51..3c87f03 100644
--- a/src/Ursa.Themes.Semi/Controls/NumericUpDown.axaml
+++ b/src/Ursa.Themes.Semi/Controls/NumericUpDown.axaml
@@ -3,6 +3,27 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:u="https://irihi.tech/ursa">
     <!--  Add Resources Here  -->
+    
+    <ControlTheme x:Key="InputClearButton" TargetType="Button">
+        <Setter Property="Button.Foreground" Value="{DynamicResource TextBoxButtonDefaultForeground}" />
+        <Setter Property="Button.Cursor" Value="Hand" />
+        <Setter Property="Button.Template">
+            <ControlTemplate TargetType="Button">
+                <!--  Background must be transparent or hit test will fail  -->
+                <ContentControl Background="Transparent">
+                    <PathIcon
+                        Width="16"
+                        Height="16"
+                        Data="{DynamicResource TextBoxClearButtonData}"
+                        Foreground="{TemplateBinding Foreground}" />
+                </ContentControl>
+            </ControlTemplate>
+        </Setter>
+        <Style Selector="^:pointerover">
+            <Setter Property="Foreground" Value="{DynamicResource TextBoxButtonPointeroverForeground}" />
+        </Style>
+    </ControlTheme>
+    
     <ControlTheme x:Key="{x:Type u:NumericUpDown}" TargetType="{x:Type u:NumericUpDown}">
         <Setter Property="NumericUpDown.VerticalContentAlignment" Value="Center" />
         <Setter Property="NumericUpDown.CornerRadius" Value="{DynamicResource NumericUpDownCornerRadius}" />
@@ -39,10 +60,27 @@
                                 Background="Transparent"
                                 Cursor="SizeAll"
                                 IsVisible="{TemplateBinding AllowDrag}" />
+                            <Button
+                                Name="PART_ClearButton"
+                                Command="{Binding $parent[u:NumericUpDown].Clear}"
+                                HorizontalAlignment="Right"
+                                Margin="0 0 8 0"
+                                IsVisible="False"
+                                Focusable="False"
+                                Theme="{StaticResource InputClearButton}" />
                         </Panel>
                     </ButtonSpinner>
                 </DataValidationErrors>
             </ControlTemplate>
         </Setter>
+        
+        <Style Selector="^.clearButton, ^.ClearButton">
+            <Style Selector="^[IsReadOnly=False]:focus /template/ Button#PART_ClearButton">
+                <Setter Property="IsVisible" Value="True" />
+            </Style>
+            <Style Selector="^[IsReadOnly=False]:pointerover /template/ Button#PART_ClearButton">
+                <Setter Property="IsVisible" Value="True" />
+            </Style>
+        </Style>
     </ControlTheme>
 </ResourceDictionary>
diff --git a/src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs b/src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs
index 0599617..5c4dd72 100644
--- a/src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs
+++ b/src/Ursa/Controls/NumericUpDown/NumericUpDownBase.cs
@@ -290,6 +290,8 @@ public abstract class NumericUpDown : TemplatedControl
 
     protected abstract bool SyncTextAndValue(bool fromTextToValue = false, string? text = null,
         bool forceTextUpdate = false);
+
+    public abstract void Clear();
 }
 
 public abstract class NumericUpDownBase<T>: NumericUpDown where T: struct, IComparable<T>
@@ -613,4 +615,9 @@ public abstract class NumericUpDownBase<T>: NumericUpDown where T: struct, IComp
     protected abstract T? Add(T? a, T? b);
     protected abstract T? Minus(T? a, T? b);
 
+    public override void Clear()
+    {
+        SetCurrentValue(ValueProperty, EmptyInputValue);
+        SyncTextAndValue(false, forceTextUpdate: true);
+    }
 }
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