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ShrlAlgoToolkit/NeuWPF/NeoUI/Assists/SelectorAssist.cs
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2025-08-20 12:10:35 +08:00

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namespace NeoUI.Assists;
/// <summary>
/// SelectorAssist 类提供了附加属性,用于增强选择器控件(如 ComboBox, ListBox 等)的功能。通过这些附加属性,可以设置选择器的方向和占位符文本。
/// </summary>
public class SelectorAssist
{
/// <summary>
/// 获取指定对象的Orientation属性值。
/// </summary>
/// <param name="obj">要获取Orientation属性的对象。</param>
/// <returns>返回对象的Orientation属性值可以是Horizontal或Vertical。</returns>
public static Orientation GetOrientation(DependencyObject obj)
{
return (Orientation)obj.GetValue(OrientationProperty);
}
/// <summary>
/// 设置指定对象的Orientation属性。
/// </summary>
/// <param name="obj">要设置Orientation属性的对象。</param>
/// <param name="value">要设置的Orientation值可以是Horizontal或Vertical。</param>
public static void SetOrientation(DependencyObject obj, Orientation value)
{
obj.SetValue(OrientationProperty, value);
}
/// <summary>
/// 表示选择器控件的方向属性可以用来设置或获取指定依赖对象的Orientation属性值。该属性支持两种方向Horizontal水平和Vertical垂直默认值为Vertical。
/// </summary>
public static readonly DependencyProperty OrientationProperty =
DependencyProperty.RegisterAttached("Orientation", typeof(Orientation), typeof(SelectorAssist), new PropertyMetadata(Orientation.Vertical));
/// <summary>
/// 获取指定对象的占位符文本。
/// </summary>
/// <param name="obj">要获取占位符文本的对象。</param>
/// <returns>返回对象的占位符文本,如果未设置则返回默认值。</returns>
public static string GetPlaceholder(DependencyObject obj)
{
return (string)obj.GetValue(PlaceholderProperty);
}
/// <summary>
/// 设置指定对象的占位符文本。
/// </summary>
/// <param name="obj">要设置占位符文本的对象。</param>
/// <param name="value">要设置的占位符文本值。</param>
public static void SetPlaceholder(DependencyObject obj, string value)
{
obj.SetValue(PlaceholderProperty, value);
}
/// <summary>
/// 表示选择器控件的占位符文本属性,可以用来设置或获取指定依赖对象的占位符文本。默认值为"请选择...",用于在选择器没有选中项时显示提示信息。
/// </summary>
public static readonly DependencyProperty PlaceholderProperty =
DependencyProperty.RegisterAttached("Placeholder", typeof(string), typeof(SelectorAssist), new PropertyMetadata("请选择..."));
}