63 lines
2.7 KiB
C#
63 lines
2.7 KiB
C#
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namespace NeoUI.Assists;
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/// <summary>
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/// 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。
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/// </summary>
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public class SelectorAssist
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{
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/// <summary>
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/// 获取指定对象的Orientation属性值。
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/// </summary>
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/// <param name="obj">要获取Orientation属性的对象。</param>
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/// <returns>返回对象的Orientation属性值，可以是Horizontal或Vertical。</returns>
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public static Orientation GetOrientation(DependencyObject obj)
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{
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return (Orientation)obj.GetValue(OrientationProperty);
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}
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/// <summary>
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/// 设置指定对象的Orientation属性。
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/// </summary>
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/// <param name="obj">要设置Orientation属性的对象。</param>
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/// <param name="value">要设置的Orientation值，可以是Horizontal或Vertical。</param>
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public static void SetOrientation(DependencyObject obj, Orientation value)
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{
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obj.SetValue(OrientationProperty, value);
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}
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/// <summary>
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/// 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。
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/// </summary>
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public static readonly DependencyProperty OrientationProperty =
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DependencyProperty.RegisterAttached("Orientation", typeof(Orientation), typeof(SelectorAssist), new PropertyMetadata(Orientation.Vertical));
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/// <summary>
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/// 获取指定对象的占位符文本。
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/// </summary>
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/// <param name="obj">要获取占位符文本的对象。</param>
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/// <returns>返回对象的占位符文本，如果未设置则返回默认值。</returns>
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public static string GetPlaceholder(DependencyObject obj)
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{
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return (string)obj.GetValue(PlaceholderProperty);
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}
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/// <summary>
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/// 设置指定对象的占位符文本。
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/// </summary>
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/// <param name="obj">要设置占位符文本的对象。</param>
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/// <param name="value">要设置的占位符文本值。</param>
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public static void SetPlaceholder(DependencyObject obj, string value)
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{
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obj.SetValue(PlaceholderProperty, value);
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}
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/// <summary>
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/// 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。
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/// </summary>
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public static readonly DependencyProperty PlaceholderProperty =
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DependencyProperty.RegisterAttached("Placeholder", typeof(string), typeof(SelectorAssist), new PropertyMetadata("请选择..."));
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}
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