<UserControl x:Class="Common.usercontrol.src.NumericUpDown"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
IsEnabledChanged="UserControl_IsEnabledChanged"
PreviewMouseWheel="UserControl_PreviewMouseWheel"
MouseEnter="UserControl_MouseEnter" MouseLeave="UserControl_MouseLeave"
GotKeyboardFocus="UserControl_GotKeyboardFocus" LostKeyboardFocus="UserControl_LostKeyboardFocus">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0" Name="EditBox" TextChanged="EditBox_TextChanged" VerticalContentAlignment="Center"
PreviewKeyDown="EditBox_PreviewKeyDown" PreviewKeyUp="EditBox_PreviewKeyUp" InputMethod.IsInputMethodEnabled="False"/>
<Label Grid.Column="1" Name="HorizontalSeparator" Width="2"/>
<Grid Grid.Column="2">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<RepeatButton Grid.Row="0" Name="BtnUp" FontFamily="Marlett" Content="t" FontSize="8" BorderThickness="1,1,1,1" Padding="0,-1,0,-1"
VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Focusable="False"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
IsTabStop="False" Click="BtnUp_Click" PreviewMouseLeftButtonUp="Btn_PreviewMouseLeftButtonUp"/>
<RepeatButton Grid.Row="2" Name="BtnDown" FontFamily="Marlett" Content="u" FontSize="8" BorderThickness="1,0,1,1" Padding="0,-1,0,-1"
VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Focusable="False"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
IsTabStop="False" Click="BtnDown_Click" PreviewMouseLeftButtonUp="Btn_PreviewMouseLeftButtonUp"/>
</Grid>
</Grid>
</UserControl>
using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Input;
namespace Common.usercontrol.src
{
public partial class NumericUpDown : UserControl
{
public NumericUpDown()
{
this.InitializeComponent();
}
public static readonly DependencyProperty ItemsSourceProperty = DependencyProperty.Register(
"ItemsSource",
typeof( ObservableCollection<string> ),
typeof( NumericUpDown )
);
public ObservableCollection<string> ItemsSource
{
get
{
return (ObservableCollection<string>)GetValue( NumericUpDown.ItemsSourceProperty );
}
set
{
SetValue( NumericUpDown.ItemsSourceProperty, value );
}
}
public static readonly DependencyProperty TextProperty = DependencyProperty.Register(
"Text",
typeof( string ),
typeof( NumericUpDown ),
new FrameworkPropertyMetadata( "Text", FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback( NumericUpDown.OnTextChanged ) )
);
public string Text
{
get
{
return (string)GetValue( NumericUpDown.TextProperty );
}
set
{
SetValue( NumericUpDown.TextProperty, value );
}
}
private static void OnTextChanged( DependencyObject obj, DependencyPropertyChangedEventArgs e )
{
NumericUpDown spinBox = obj as NumericUpDown;
if( spinBox != null )
{
spinBox.EditBox.Text = spinBox.Text;
}
}
public static readonly DependencyProperty LoopProperty = DependencyProperty.Register(
"Loop",
typeof( bool ),
typeof( NumericUpDown ),
new FrameworkPropertyMetadata( true, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault )
);
public bool Loop
{
get
{
return (bool)GetValue( NumericUpDown.LoopProperty );
}
set
{
SetValue( NumericUpDown.LoopProperty, value );
}
}
public static readonly DependencyProperty MaxLengthProperty = DependencyProperty.Register(
"MaxLength",
typeof( int ),
typeof( NumericUpDown ),
new FrameworkPropertyMetadata( 100, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback( NumericUpDown.OnMaxLengthChanged ) )
);
public int MaxLength
{
get
{
return (int)GetValue( NumericUpDown.MaxLengthProperty );
}
set
{
SetValue( NumericUpDown.MaxLengthProperty, value );
}
}
private static void OnMaxLengthChanged( DependencyObject obj, DependencyPropertyChangedEventArgs e )
{
NumericUpDown spinBox = obj as NumericUpDown;
if( spinBox != null )
{
spinBox.EditBox.MaxLength = (int)e.NewValue;
}
}
public static readonly RoutedEvent TextChangedEvent = EventManager.RegisterRoutedEvent(
"TextChanged",
RoutingStrategy.Direct,
typeof( TextChangedEventHandler ),
typeof( NumericUpDown )
);
public event TextChangedEventHandler TextChanged
{
add
{
this.AddHandler( TextChangedEvent, value );
}
remove
{
this.RemoveHandler( TextChangedEvent, value );
}
}
public TextBox TextBox
{
get
{
return this.EditBox;
}
}
private void UserControl_IsEnabledChanged( object sender, DependencyPropertyChangedEventArgs e )
{
this.EditBox.IsReadOnly = !this.IsEnabled;
this.BtnUp.IsEnabled = this.IsEnabled;
this.BtnDown.IsEnabled = this.IsEnabled;
}
private void EditBox_TextChanged( object sender, TextChangedEventArgs e )
{
this.Text = this.EditBox.Text;
this.RaiseEvent( new TextChangedEventArgs( NumericUpDown.TextChangedEvent, e.UndoAction, e.Changes ) );
}
private void EditBox_PreviewKeyDown( object sender, KeyEventArgs e )
{
e.Handled = true;
if( Key.Up == e.Key || Key.Down == e.Key )
{
if( Key.Up == e.Key )
{
this.MoveUp();
}
else if( Key.Down == e.Key )
{
this.MoveDown();
}
}
else
{
e.Handled = false;
}
}
private void EditBox_PreviewKeyUp( object sender, KeyEventArgs e )
{
if( Key.Up == e.Key || Key.Down == e.Key || Key.Enter == e.Key )
{
e.Handled = true;
this.UpdateBindingSource( this );
}
}
private void BtnUp_Click( object sender, RoutedEventArgs e )
{
if( !this.TextBox.IsFocused )
{
this.TextBox.Focus();
}
this.MoveUp();
}
private void BtnDown_Click( object sender, RoutedEventArgs e )
{
if( !this.TextBox.IsFocused )
{
this.TextBox.Focus();
}
this.MoveDown();
}
private void Btn_PreviewMouseLeftButtonUp( object sender, MouseButtonEventArgs e )
{
this.UpdateBindingSource( this );
}
private bool _isMouseWheelEnabled = false;
private int _mouseWheelDelta = 0;
private object _lock = new object();
private void UserControl_PreviewMouseWheel( object sender, MouseWheelEventArgs e )
{
if( !this._isMouseWheelEnabled )
{
return;
}
if( sender == this )
{
e.Handled = true;
}
lock( this._lock )
{
this._mouseWheelDelta = e.Delta;
}
if( 0 < e.Delta )
{
this.MoveUp();
}
else if( 0 > e.Delta )
{
this.MoveDown();
}
}
private void UpdateBindingSourceByMouseWheel( object sender, MouseEventArgs e )
{
lock( this._lock )
{
if( this._mouseWheelDelta != 0 )
{
this._mouseWheelDelta = 0;
this.UpdateBindingSource( this );
}
}
}
private void UserControl_MouseEnter( object sender, MouseEventArgs e )
{
this.MouseMove += this.UpdateBindingSourceByMouseWheel;
}
private void UserControl_MouseLeave( object sender, MouseEventArgs e )
{
this.MouseMove -= this.UpdateBindingSourceByMouseWheel;
}
private void UserControl_GotKeyboardFocus( object sender, KeyboardFocusChangedEventArgs e )
{
this._isMouseWheelEnabled = true;
}
private void UserControl_LostKeyboardFocus( object sender, KeyboardFocusChangedEventArgs e )
{
this._isMouseWheelEnabled = false;
}
private void MoveUp()
{
if( this.ItemsSource == null )
{
throw new NullReferenceException( "NumericUpDown is not initialized" );
}
if( 0 == this.ItemsSource.Count )
{
return;
}
int currentIndex = this.ItemsSource.IndexOf( this.Text );
if( currentIndex < 0 )
{
if( this.Loop )
{
this.Text = this.ItemsSource.First();
}
}
else if( currentIndex < this.ItemsSource.Count - 1 )
{
this.Text = this.ItemsSource[currentIndex + 1];
}
else
{
if( this.Loop )
{
this.Text = this.ItemsSource.First();
}
}
this.EditBox.SelectAll();
}
private void MoveDown()
{
if( this.ItemsSource == null )
{
throw new NullReferenceException( "NumericUpDown is not initialized" );
}
if( 0 == this.ItemsSource.Count )
{
return;
}
int currentIndex = this.ItemsSource.IndexOf( this.Text );
if( currentIndex < 0 )
{
if( this.Loop )
{
if( double.TryParse( this.ItemsSource.First(), out double _ ) )
{
this.Text = this.ItemsSource.Last();
}
else
{
this.Text = this.ItemsSource.First();
}
}
}
else if( currentIndex == 0 )
{
if( this.Loop )
{
this.Text = this.ItemsSource.Last();
}
}
else
{
this.Text = this.ItemsSource[currentIndex - 1];
}
this.EditBox.SelectAll();
}
private void UpdateBindingSource( NumericUpDown spinBox )
{
BindingExpression bind = this.GetBindingExpression( NumericUpDown.TextProperty );
if( bind != null )
{
bind.UpdateSource();
}
}
}
}
