XFEToolBox

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace XFEToolBox.WpfCore.Controls;

public class HintTextBox : TextBox
{
    static HintTextBox()
    {
        // TextBox 默认使用顶部内容对齐。输入控件未加载隐式样式或使用独立样式时，
        // 仍应保持单行内容垂直居中；调用方可以通过本地属性覆盖此默认值。
        VerticalContentAlignmentProperty.OverrideMetadata(
            typeof(HintTextBox),
            new FrameworkPropertyMetadata(VerticalAlignment.Center));
    }

    public string HintText
    {
        get { return (string)GetValue(HintTextProperty); }
        set { SetValue(HintTextProperty, value); }
    }
    public static readonly DependencyProperty HintTextProperty = DependencyProperty.Register("HintText", typeof(string), typeof(HintTextBox), new PropertyMetadata("请输入文本"));

    public Brush HintForeground
    {
        get { return (Brush)GetValue(HintForegroundProperty); }
        set { SetValue(HintForegroundProperty, value); }
    }
    public static readonly DependencyProperty HintForegroundProperty = DependencyProperty.Register("HintForeground", typeof(Brush), typeof(HintTextBox), new PropertyMetadata(new SolidColorBrush(Colors.Black)));

    public Brush HintBackground
    {
        get { return (Brush)GetValue(HintBackgroundProperty); }
        set { SetValue(HintBackgroundProperty, value); }
    }
    public static readonly DependencyProperty HintBackgroundProperty = DependencyProperty.Register("HintBackground", typeof(Brush), typeof(HintTextBox), new PropertyMetadata(new SolidColorBrush(Colors.Transparent)));

    public double HintFontSize
    {
        get { return (double)GetValue(HintFontSizeProperty); }
        set { SetValue(HintFontSizeProperty, value); }
    }
    public static readonly DependencyProperty HintFontSizeProperty = DependencyProperty.Register("HintFontSize", typeof(double), typeof(HintTextBox), new PropertyMetadata(13d));

    public FontFamily HintFontFamily
    {
        get { return (FontFamily)GetValue(HintFontFamilyProperty); }
        set { SetValue(HintFontFamilyProperty, value); }
    }
    public static readonly DependencyProperty HintFontFamilyProperty = DependencyProperty.Register("HintFontFamily", typeof(FontFamily), typeof(HintTextBox), new PropertyMetadata(new FontFamily()));

    public FontWeight HintFontWeight
    {
        get { return (FontWeight)GetValue(HintFontWeightProperty); }
        set { SetValue(HintFontWeightProperty, value); }
    }
    public static readonly DependencyProperty HintFontWeightProperty = DependencyProperty.Register("HintFontWeight", typeof(FontWeight), typeof(HintTextBox), new PropertyMetadata(new FontWeight()));

    public Thickness HintTextMargin
    {
        get { return (Thickness)GetValue(HintTextMarginProperty); }
        set { SetValue(HintTextMarginProperty, value); }
    }
    public static readonly DependencyProperty HintTextMarginProperty = DependencyProperty.Register("HintTextMargin", typeof(Thickness), typeof(HintTextBox), new PropertyMetadata(new Thickness(10, 0, 0, 0)));

    public double HintTextOpacity
    {
        get { return (double)GetValue(HintTextOpacityProperty); }
        set { SetValue(HintTextOpacityProperty, value); }
    }
    public static readonly DependencyProperty HintTextOpacityProperty = DependencyProperty.Register("HintTextOpacity", typeof(double), typeof(HintTextBox), new PropertyMetadata(0.5d));

    public VerticalAlignment HintTextVerticalAlignment
    {
        get { return (VerticalAlignment)GetValue(HintTextVerticalAlignmentProperty); }
        set { SetValue(HintTextVerticalAlignmentProperty, value); }
    }
    public static readonly DependencyProperty HintTextVerticalAlignmentProperty = DependencyProperty.Register("HintTextVerticalAlignment", typeof(VerticalAlignment), typeof(HintTextBox), new PropertyMetadata(VerticalAlignment.Center));

    public HorizontalAlignment HintTextHorizontalAlignment
    {
        get { return (HorizontalAlignment)GetValue(HintTextHorizontalAlignmentProperty); }
        set { SetValue(HintTextHorizontalAlignmentProperty, value); }
    }
    public static readonly DependencyProperty HintTextHorizontalAlignmentProperty = DependencyProperty.Register("HintTextHorizontalAlignment", typeof(HorizontalAlignment), typeof(HintTextBox), new PropertyMetadata(HorizontalAlignment.Left));
}