ShrlAlgoToolkit/Melskin/Controls/ChooseBox.xaml.cs


using Microsoft.Win32;


namespace Melskin.Controls;

/// <summary>
/// ChooseBox 控件继承自 TextBox，用于提供一个带有选择按钮的文本框。该控件主要用于文件或文件夹的选择，并且可以设置占位符文本、选择类型等属性。
/// </summary>
public class ChooseBox : System.Windows.Controls.TextBox
{
    private Button? PART_ChooseButton;

    static ChooseBox()
    { DefaultStyleKeyProperty.OverrideMetadata(typeof(ChooseBox), new FrameworkPropertyMetadata(typeof(ChooseBox))); }

    /// <summary>
    /// 获取或设置控件中的占位符文本。
    /// </summary>
    public string PlaceholderText
    {
        get => (string)GetValue(PlaceholderTextProperty);
        set => SetValue(PlaceholderTextProperty, value);
    }

    /// <summary>
    /// 获取或设置占位符文本的依赖属性。
    /// </summary>
    public static readonly DependencyProperty PlaceholderTextProperty =
        DependencyProperty.Register(nameof(PlaceholderText), typeof(string), typeof(ChooseBox), new PropertyMetadata(string.Empty));



    #region Event Implement Function
    private void PART_ChooseButton_Click(object sender, RoutedEventArgs e)
    {
        switch (ChooseType)
        {
            case ChooseType.SingleFile:
                OpenFileDialog openFileDialog =
                    new()
                    {
                        Multiselect = false,
                        //"文本文件|*.*|C#文件|*.cs|所有文件|*.*"
                        Filter = Filter
                    };
                if (openFileDialog.ShowDialog() == true)
                    this.Text = openFileDialog.FileName;
                break;
            case ChooseType.MultiFiles:
                OpenFileDialog multiFileDialog =
                    new()
                    {
                        Multiselect = true,
                        Filter = Filter
                    };
                if (multiFileDialog.ShowDialog() == true)
                {
                    var fileName = string.Empty;
                    foreach (var item in multiFileDialog.FileNames)
                    {
                        fileName += $"{item};";
                    }
                    this.Text = fileName.TrimEnd(';');
                }
                break;
            case ChooseType.Folder:
                var folderDialog = new VistaFolderBrowserDialog();
                if (folderDialog.ShowDialog() == true)
                    this.Text = folderDialog.SelectedPath;
                break;
            case ChooseType.SaveFile:
                var fileDialog = new SaveFileDialog
                {
                    Filter = Filter, //设置文件类型
                    FileName = DefaultFileName, //设置默认文件名
                    DefaultExt = DefaultExt, //设置默认格式（可以不设）
                    AddExtension = true //设置自动在文件名中添加扩展名
                };
                if (fileDialog.ShowDialog() == true)
                    this.Text = fileDialog.FileName;
                break;
        }
    }
    #endregion

    #region Override

    /// <inheritdoc />
    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        PART_ChooseButton = this.GetTemplateChild("PART_ChooseButton") as System.Windows.Controls.Button;
        if (PART_ChooseButton != null)
        {
            PART_ChooseButton.Click += PART_ChooseButton_Click;
        }
    }
    #endregion

    #region ChooseButtonStyle
    /// <summary>
    /// 获取或者设置选择按钮的样式
    /// </summary>
    public Style ChooseButtonStyle
    {
        get => (Style)GetValue(ChooseButtonStyleProperty);
        set => SetValue(ChooseButtonStyleProperty, value);
    }

    /// <summary>
    /// 获取或设置选择按钮的样式。
    /// </summary>
    public static readonly DependencyProperty ChooseButtonStyleProperty = DependencyProperty.Register(
        nameof(ChooseButtonStyle),
        typeof(Style),
        typeof(ChooseBox));
    #endregion

    #region ChooseBoxType

    /// <summary>
    /// 获取或设置选择框的选择类型，用于指定用户可以选择单个文件、多个文件、文件夹或保存文件。
    /// </summary>
    public ChooseType ChooseType
    {
        get => (ChooseType)GetValue(ChooseTypeProperty);
        set => SetValue(ChooseTypeProperty, value);
    }

    /// <summary>
    /// 获取或设置选择框的选择类型，用于指定用户可以选择单个文件、多个文件、文件夹还是保存文件。
    /// </summary>
    public static readonly DependencyProperty ChooseTypeProperty = DependencyProperty.Register(
        nameof(ChooseType),
        typeof(ChooseType),
        typeof(ChooseBox),
        new PropertyMetadata(ChooseType.SingleFile, OnChooseTypeChanged));

    private static void OnChooseTypeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is not ChooseBox chooseBox) return;
        switch ((ChooseType)e.NewValue)
        {
            case ChooseType.SingleFile:
                chooseBox.PlaceholderText = "请选择文件";
                break;
            case ChooseType.MultiFiles:
                chooseBox.PlaceholderText = "请选择多个文件";
                break;
            case ChooseType.Folder:
                chooseBox.PlaceholderText = "请选择文件夹";
                break;
            case ChooseType.SaveFile:
                chooseBox.PlaceholderText = "请选择保存文件路径";
                break;
            default:
                throw new ArgumentOutOfRangeException();
        }
    }
    #endregion

    #region ChooseButtonWidth

    /// <summary>
    /// 获取或设置选择按钮的宽度。
    /// </summary>
    public double ChooseButtonWidth
    {
        get => (double)GetValue(ChooseButtonWidthProperty);
        set => SetValue(ChooseButtonWidthProperty, value);
    }

    /// <summary>
    /// 获取或设置选择按钮的宽度。
    /// </summary>
    public static readonly DependencyProperty ChooseButtonWidthProperty = DependencyProperty.Register(
        nameof(ChooseButtonWidth),
        typeof(double),
        typeof(ChooseBox),
        new PropertyMetadata(24d));
    #endregion

    #region ChooseBoxFilter

    /// <summary>
    /// 获取或设置文件对话框中使用的过滤器，用于指定可选择的文件类型。
    /// </summary>
    public string Filter
    {
        get => (string)GetValue(FilterProperty);
        set => SetValue(FilterProperty, value);
    }

    /// <summary>
    /// 获取或设置文件过滤器，用于指定在选择文件时显示的文件类型。
    /// </summary>
    public static readonly DependencyProperty FilterProperty = DependencyProperty.Register(
        nameof(Filter),
        typeof(string),
        typeof(ChooseBox),
        new PropertyMetadata("所有文件|*.*"));
    #endregion

    #region DefaultFileName

    /// <summary>
    /// 获取或设置保存文件对话框中的默认文件名。
    /// </summary>
    public string DefaultFileName
    {
        get => (string)GetValue(DefaultFileNameProperty);
        set => SetValue(DefaultFileNameProperty, value);
    }

    /// <summary>
    /// 获取或设置选择框的默认文件名。
    /// </summary>
    public static readonly DependencyProperty DefaultFileNameProperty = DependencyProperty.Register(
        nameof(DefaultFileName),
        typeof(string),
        typeof(ChooseBox),
        new PropertyMetadata("文件"));
    #endregion

    #region DefaultExt

    /// <summary>
    /// 获取或设置文件对话框中的默认扩展名。
    /// </summary>
    public string DefaultExt
    {
        get => (string)GetValue(DefaultExtProperty);
        set => SetValue(DefaultExtProperty, value);
    }

    /// <summary>
    /// 获取或设置默认的文件扩展名。
    /// </summary>
    public static readonly DependencyProperty DefaultExtProperty = DependencyProperty.Register(
        nameof(DefaultExt),
        typeof(string),
        typeof(ChooseBox),
        new PropertyMetadata(string.Empty));
    #endregion
}

/// <summary>
/// 定义选择框的选择类型。
/// </summary>
public enum ChooseType
{
    /// <summary>
    /// 选择单个文件。当设置为该选项时，将打开一个文件对话框允许用户选择单个文件。
    /// </summary>
    SingleFile,

    /// <summary>
    /// 表示选择类型为多文件。当设置此选项时，用户可以选择多个文件。
    /// </summary>
    MultiFiles,

    /// <summary>
    /// 表示选择类型为文件夹。当设置此选项时，用户将能够通过对话框选择一个文件夹路径。
    /// </summary>
    Folder,

    /// <summary>
    /// 选择类型为保存文件。当此枚举成员被选中时，将显示一个“另存为”对话框，允许用户选择文件的保存位置和名称。
    /// </summary>
    SaveFile,
}