初始化 monorepo: Go后端(7微服务) + Unity客户端(9模块) + 启动器 HTML5原型: Three.js 3D体素世界, Perlin噪声地形, 原版材质, 22种方块 Minecraft创造模式背包: 双栏布局, 拖拽移动物品, 方向性元件引脚 AI助搭策划文档 + 客户端/服务端骨架 + Docker Compose + CI
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Controls.Primitives;
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using System.Windows.Input;
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using PCL.Core.App.Localization;
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namespace PCL;
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public class MyComboBox : ComboBox
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{
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public delegate void TextChangedEventHandler(object sender, TextChangedEventArgs e);
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public static readonly DependencyProperty HintTextProperty = DependencyProperty.Register("HintText", typeof(string),
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typeof(MyComboBox), new PropertyMetadata("", (d, e) =>
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{
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var c = (MyComboBox)d;
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if (c.textBox is not null)
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c.textBox.HintText = (string)e.NewValue;
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}));
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private string _Text;
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// 鼠标按下接口
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private bool isMouseDown;
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// 修复 WPF Bug：下拉框文本修改后，依然误认为还选择着此前的选项，导致再次点击该选项时内容不变
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private bool isTextChanging;
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private double realWidth; // 由于下拉框 Popup 宽度与 Width 一致，故不能为 NaN（Auto）
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private MyTextBox textBox;
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// 基础
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public int Uuid = ModBase.GetUuid();
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public MyComboBox()
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{
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_Text = SelectedItem?.ToString() ?? "";
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PreviewMouseLeftButtonDown += MyComboBox_PreviewMouseLeftButtonDown;
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PreviewMouseLeftButtonUp += MyComboBox_PreviewMouseLeftButtonUp;
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MouseLeave += MyComboBox_PreviewMouseLeftButtonUp;
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IsEnabledChanged += (_, _) => RefreshColor();
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MouseEnter += (_, _) => RefreshColor();
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MouseLeave += (_, _) => RefreshColor();
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PreviewMouseLeftButtonDown += (_, _) => RefreshColor();
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PreviewMouseLeftButtonUp += (_, _) => RefreshColor();
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GotKeyboardFocus += (_, _) => RefreshColor();
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DropDownOpened += MyComboBox_DropDownOpened;
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DropDownClosed += MyComboBox_DropDownClosed;
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TextChanged += MyComboBox_TextChanged;
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}
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public string HintText
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{
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get => (string)GetValue(HintTextProperty);
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set => SetValue(HintTextProperty, value);
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}
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public new string Text
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{
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get
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{
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if (IsEditable)
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{
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if (textBox is null) return _Text ?? "";
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return textBox.Text ?? "";
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}
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return (SelectedItem ?? "").ToString();
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}
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set
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{
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if (IsEditable)
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{
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if (textBox is null)
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_Text = value;
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else
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textBox.Text = value;
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}
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else
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{
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throw new NotSupportedException("该 ComboBox 不支持修改文本。");
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}
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}
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}
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public bool DropDownWidthSync { get; set; } = true;
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public ContentPresenter ContentPresenter => (ContentPresenter)Template.FindName("PART_Content", this);
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public event TextChangedEventHandler? TextChanged;
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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if (!IsEditable)
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return;
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try
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{
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textBox = (MyTextBox)Template.FindName("PART_EditableTextBox", this);
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textBox.AddHandler(LostFocusEvent, new RoutedEventHandler((_, _) => RefreshColor()));
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textBox.changedEventList.Add((sender, e) => TextChanged?.Invoke(sender, (TextChangedEventArgs)e));
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textBox.Tag = Tag; // 有时需要用文本框的 Tag 来写入设置
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if (string.IsNullOrEmpty(Text))
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textBox.Text = _Text;
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else
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TextChanged?.Invoke(this, null);
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if (HintText.Length > 0)
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textBox.HintText = HintText;
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textBox.SetResourceReference(TextBoxBase.CaretBrushProperty, "ColorBrushGray1");
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}
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catch (Exception ex)
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{
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ModBase.Log(
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ex,
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"初始化可编辑文本框失败（" + (Name ?? "") + "）",
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ModBase.LogLevel.Feedback,
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userSummary: Lang.Text("Application.Control.Error.OperationFailed"));
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}
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}
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private void MyComboBox_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
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{
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isMouseDown = true;
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}
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private void MyComboBox_PreviewMouseLeftButtonUp(object sender, EventArgs e)
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{
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isMouseDown = false;
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}
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// 指向动画
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public void RefreshColor()
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{
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// 判断当前颜色
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string foreColorName;
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string backColorName;
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int time;
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if (IsEnabled)
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{
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if (isMouseDown || IsDropDownOpen ||
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(IsEditable && ((MyTextBox)Template.FindName("PART_EditableTextBox", this)).IsFocused))
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{
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foreColorName = "ColorBrush3";
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backColorName = "ColorBrush7";
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time = 10;
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}
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else if (IsMouseOver)
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{
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foreColorName = "ColorBrush4";
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backColorName = "ColorBrush7";
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time = 100;
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}
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else
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{
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foreColorName = "ColorBrushBg0";
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backColorName = "ColorBrushHalfWhite";
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time = 100;
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}
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}
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else
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{
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foreColorName = "ColorBrushGray5";
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backColorName = "ColorBrushGray6";
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time = 200;
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}
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// 触发颜色动画
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if (IsLoaded && ModAnimation.AniControlEnabled == 0) // 防止默认属性变更触发动画
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{
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// 有动画
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ModAnimation.AniStart(
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new[]
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{
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ModAnimation.AaColor(this, ForegroundProperty, foreColorName, time),
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ModAnimation.AaColor(this, BackgroundProperty, backColorName, time)
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}, "MyComboBox Color " + Uuid);
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}
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else
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{
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// 无动画
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ModAnimation.AniStop("MyComboBox Color " + Uuid);
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SetResourceReference(ForegroundProperty, foreColorName);
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SetResourceReference(BackgroundProperty, backColorName);
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}
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}
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private void MyComboBox_DropDownOpened(object sender, EventArgs e)
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{
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realWidth = Width;
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if (DropDownWidthSync)
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Width = ActualWidth;
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try
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{
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var popup = (Grid)Template.FindName("PanPopup", this);
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popup.Opacity = ModMain.frmMain.Opacity;
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if (!DropDownWidthSync)
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popup.MinWidth = ActualWidth;
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}
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catch (Exception ex)
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{
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ModBase.Log(
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ex,
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"设置下拉框属性失败",
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ModBase.LogLevel.Feedback,
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userSummary: Lang.Text("Application.Control.Error.OperationFailed"));
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}
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}
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private void MyComboBox_DropDownClosed(object sender, EventArgs e)
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{
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Width = realWidth;
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}
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private void MyComboBox_TextChanged(object sender, TextChangedEventArgs e)
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{
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if (isTextChanging || !IsEditable)
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return;
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if (SelectedItem is null || Text == SelectedItem.ToString()) return;
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{
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var rawText = Text;
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var rawSelectionStart = textBox.SelectionStart;
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isTextChanging = true;
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SelectedItem = null;
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Text = rawText;
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textBox.SelectionStart = rawSelectionStart;
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isTextChanging = false;
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}
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}
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// 用于 ItemsSource 的自定义容器
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protected override DependencyObject GetContainerForItemOverride()
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{
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return new MyComboBoxItem();
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}
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private void MyComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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if (IsLoaded && ModAnimation.AniControlEnabled == 0) ModMain.RaiseCustomEvent(this);
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}
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protected override bool IsItemItsOwnContainerOverride(object item)
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{
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return item is MyComboBoxItem || base.IsItemItsOwnContainerOverride(item);
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}
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}
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