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[#37] Controls: Implement IntegerUpDown
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Lorenz Stechauner
2024-06-03 16:59:45 +02:00
parent ff375e3caf
commit cc4ec6c5db
7 changed files with 170 additions and 10 deletions
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106
Elwig/Controls/IntegerUpDown.cs Normal file
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using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
namespace Elwig.Controls {
public class IntegerUpDown : TextBox {
public static readonly DependencyProperty MinimumProperty = DependencyProperty.Register("Miminum", typeof(int?), typeof(IntegerUpDown), new FrameworkPropertyMetadata(null));
public int? Minimum {
get => (int?)GetValue(MinimumProperty);
set => SetValue(MinimumProperty, value);
}
public static readonly DependencyProperty MaximumProperty = DependencyProperty.Register("Maximum", typeof(int?), typeof(IntegerUpDown), new FrameworkPropertyMetadata(null));
public int? Maximum {
get => (int?)GetValue(MaximumProperty);
set => SetValue(MaximumProperty, value);
}
public int? Value {
get => int.TryParse(Text, out var res) ? res : null;
set => Text = $"{value}";
}
static IntegerUpDown() {
DefaultStyleKeyProperty.OverrideMetadata(typeof(IntegerUpDown), new FrameworkPropertyMetadata(typeof(IntegerUpDown)));
}
public IntegerUpDown() {
TextChanged += IntegerUpDown_TextChanged;
LostFocus += IntegerUpDown_LostFocus;
KeyUp += IntegerUpDown_KeyUp;
}
public override void OnApplyTemplate() {
var incButton = GetTemplateChild("IncrementButton") as RepeatButton;
var decButton = GetTemplateChild("DecrementButton") as RepeatButton;
incButton!.Click += IncrementButton_Click;
decButton!.Click += DecrementButton_Click;
base.OnApplyTemplate();
}
private void IntegerUpDown_TextChanged(object sender, TextChangedEventArgs evt) {
var idx = CaretIndex;
Text = new string(Text.Where(char.IsAsciiDigit).Take(4).ToArray());
CaretIndex = idx;
evt.Handled = !(Value >= Minimum && Value <= Maximum);
if (idx >= 4) {
if (Value < Minimum) {
Value = Minimum;
} else if (Value > Maximum) {
Value = Maximum;
}
CaretIndex = 4;
}
}
private void IntegerUpDown_LostFocus(object sender, RoutedEventArgs evt) {
if (Value < Minimum) {
Value = Minimum;
} else if (Value > Maximum) {
Value = Maximum;
}
}
private void IncrementButton_Click(object sender, RoutedEventArgs evt) {
Value = Math.Min((Value ?? 0) + 1, Maximum ?? int.MaxValue);
}
private void DecrementButton_Click(object sender, RoutedEventArgs evt) {
Value = Math.Max((Value ?? 0) - 1, Minimum ?? int.MinValue);
}
private void IntegerUpDown_KeyUp(object sender, KeyEventArgs evt) {
switch (evt.Key) {
case Key.Up:
case Key.Add:
case Key.OemPlus:
Value = Math.Min((Value ?? 0) + 1, Maximum ?? int.MaxValue);
evt.Handled = true;
CaretIndex = 4;
break;
case Key.Down:
case Key.Subtract:
case Key.OemMinus:
Value = Math.Max((Value ?? 0) - 1, Minimum ?? int.MinValue);
evt.Handled = true;
CaretIndex = 4;
break;
case Key.PageUp:
Value = Math.Min((Value ?? 0) + 10, Maximum ?? int.MaxValue);
evt.Handled = true;
CaretIndex = 4;
break;
case Key.PageDown:
Value = Math.Max((Value ?? 0) - 10, Minimum ?? int.MinValue);
evt.Handled = true;
CaretIndex = 4;
break;
}
}
}
}

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Elwig/Controls/IntegerUpDown.xaml Normal file
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<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ctrl="clr-namespace:Elwig.Controls">
<Style TargetType="ctrl:IntegerUpDown" BasedOn="{StaticResource {x:Type TextBox}}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ctrl:IntegerUpDown">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="18"/>
</Grid.ColumnDefinitions>
<Border x:Name="Border" BorderThickness="1,1,0,1"
BorderBrush="{Binding Path=BorderBrush, RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay}"
SnapsToDevicePixels="True" Grid.RowSpan="2">
<ScrollViewer x:Name="PART_ContentHost" VerticalAlignment="Center"/>
</Border>
<RepeatButton x:Name="IncrementButton" Padding="0" Height="Auto" Width="Auto" BorderThickness="1,1,1,0"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Row="0" Grid.Column="1">
<Path x:Name="IconIncrement" Data="M 0,4 L 4,0 L 8,4 Z" Fill="#FF444444"
HorizontalAlignment="Center" VerticalAlignment="Center"/>
</RepeatButton>
<RepeatButton x:Name="DecrementButton" Padding="0" Height="Auto" Width="Auto" BorderThickness="1,0,1,1"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Grid.Row="1" Grid.Column="1">
<Path x:Name="IconDecrement" Data="M 0,0 L 4,4 L 8,0 Z" Fill="#FF444444"
HorizontalAlignment="Center" VerticalAlignment="Center"/>
</RepeatButton>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="Border" Property="BorderBrush" Value="LightGray"/>
<Setter TargetName="IconIncrement" Property="Fill" Value="#FF888888"/>
<Setter TargetName="IconDecrement" Property="Fill" Value="#FF888888"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="TextAlignment" Value="Right"/>
<Style.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="Gray"/>
</Trigger>
</Style.Triggers>
</Style>
</ResourceDictionary>