TMTT/PlcUiControl/MyUiControl/UiComboBox.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms;
using Sunny.UI;


[DefaultProperty("Items")]
[DefaultEvent("SelectedIndexChanged")]
[ToolboxItem(true)]
[Description("组合框控件")]
[LookupBindingProperties("DataSource", "DisplayMember", "ValueMember", "SelectedValue")]
public class UiComboBox : UIDropControl, IToolTip, IHideDropDown
{
    private object filterSelectedItem;

    private object filterSelectedValue;

    private bool showFilter;

    private CurrencyManager dataManager;

    private List<object> filterList = new List<object>();

    private bool SelectTextChange;

    private readonly UIComboBoxItem dropForm = new UIComboBoxItem();

    private readonly UIComboBoxItem filterForm = new UIComboBoxItem();

    private UIDropDown filterItemForm;

    private bool Wana_1;

    private BindingMemberInfo ValueMemberBindingMemberInfo;

    private IContainer components;

    [Browsable(false)]
    public override string[] FormTranslatorProperties => null;

    [DefaultValue(0)]
    [Category("SunnyUI")]
    [Description("垂直滚动条宽度，最小为原生滚动条宽度")]
    public int ScrollBarWidth
    {
        get
        {
            return ListBox.ScrollBarWidth;
        }
        set
        {
            ListBox.ScrollBarWidth = value;
        }
    }

    [DefaultValue(6)]
    [Category("SunnyUI")]
    [Description("垂直滚动条滑块宽度，最小为原生滚动条宽度")]
    public int ScrollBarHandleWidth
    {
        get
        {
            return ListBox.ScrollBarHandleWidth;
        }
        set
        {
            ListBox.ScrollBarHandleWidth = value;
        }
    }

    [DefaultValue(false)]
    [Description("显示清除按钮")]
    [Category("SunnyUI")]
    public bool ShowClearButton
    {
        get
        {
            return showClearButton;
        }
        set
        {
            showClearButton = value;
        }
    }

    [DefaultValue(false)]
    [Description("显示过滤")]
    [Category("SunnyUI")]
    public bool ShowFilter
    {
        get
        {
            return showFilter;
        }
        set
        {
            showFilter = value;
            if (value)
            {
                base.DropDownStyle = UIDropDownStyle.DropDown;
            }
        }
    }

    [DefaultValue(100)]
    [Description("过滤显示最大条目数")]
    [Category("SunnyUI")]
    public int FilterMaxCount { get; set; } = 100;


    [DefaultValue(false)]
    public bool Sorted
    {
        get
        {
            return ListBox.Sorted;
        }
        set
        {
            ListBox.Sorted = value;
        }
    }

    [DefaultValue(false)]
    [Description("过滤时删除字符串前面、后面的空格")]
    [Category("SunnyUI")]
    public bool TrimFilter { get; set; }

    [DefaultValue(false)]
    [Description("过滤时忽略大小写")]
    [Category("SunnyUI")]
    public bool FilterIgnoreCase { get; set; }

    private UIDropDown FilterItemForm
    {
        get
        {
            if (filterItemForm == null)
            {
                filterItemForm = new UIDropDown(filterForm);
                if (filterItemForm != null)
                {
                    filterItemForm.VisibleChanged += FilterItemForm_VisibleChanged;
                }
            }

            return filterItemForm;
        }
    }

    private UIListBox ListBox => dropForm.ListBox;

    private UIListBox FilterListBox => filterForm.ListBox;

    [DefaultValue(25)]
    [Description("列表项高度")]
    [Category("SunnyUI")]
    public int ItemHeight
    {
        get
        {
            return ListBox.ItemHeight;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            int itemHeight = (ListBox.ItemHeight = value);
            filterListBox.ItemHeight = itemHeight;
        }
    }

    [DefaultValue(8)]
    [Description("列表下拉最大个数")]
    [Category("SunnyUI")]
    public int MaxDropDownItems { get; set; } = 8;


    [DefaultValue(false)]
    [Description("不显示过滤可以自动调整下拉框宽度")]
    [Category("SunnyUI")]
    public bool DropDownAutoWidth { get; set; }

    public object DataSource
    {
        get
        {
            return ListBox.DataSource;
        }
        set
        {
            ListBox.DataSource = value;
            Box_DataSourceChanged(this, EventArgs.Empty);
        }
    }

    [DefaultValue(150)]
    [Description("下拉框宽度")]
    [Category("SunnyUI")]
    public int DropDownWidth { get; set; }

    [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
    [Localizable(true)]
    [Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
    [MergableProperty(false)]
    [Description("列表项")]
    [Category("SunnyUI")]
    public ListBox.ObjectCollection Items => ListBox.Items;

    [Browsable(false)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    [Description("选中索引")]
    [Category("SunnyUI")]
    public int SelectedIndex
    {
        get
        {
            if (!ShowFilter)
            {
                return ListBox.SelectedIndex;
            }

            return -1;
        }
        set
        {
            if (!ShowFilter)
            {
                if (DataSource != null && value == -1 && SelectedIndex > 0)
                {
                    Wana_1 = true;
                    SelectedIndex = 0;
                    Wana_1 = false;
                }

                ListBox.SelectedIndex = value;
            }
        }
    }

    [Browsable(false)]
    [Bindable(true)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    [Description("选中项")]
    [Category("SunnyUI")]
    public object SelectedItem
    {
        get
        {
            if (!ShowFilter)
            {
                return ListBox.SelectedItem;
            }

            return filterSelectedItem;
        }
        set
        {
            if (!ShowFilter)
            {
                ListBox.SelectedItem = value;
            }
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    [Description("选中文字")]
    [Category("SunnyUI")]
    public string SelectedText
    {
        get
        {
            if (base.DropDownStyle == UIDropDownStyle.DropDown)
            {
                return edit.SelectedText;
            }

            return Text;
        }
    }

    [Description("获取或设置要为此列表框显示的属性。")]
    [Category("SunnyUI")]
    [DefaultValue("")]
    [Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
    [TypeConverter("System.Windows.Forms.Design.DataMemberFieldConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
    public string DisplayMember
    {
        get
        {
            return ListBox.DisplayMember;
        }
        set
        {
            ListBox.DisplayMember = value;
            Box_DisplayMemberChanged(this, EventArgs.Empty);
        }
    }

    [Description("获取或设置指示显示值的方式的格式说明符字符。")]
    [Category("SunnyUI")]
    [DefaultValue("")]
    [MergableProperty(false)]
    public string FormatString
    {
        get
        {
            return ListBox.FormatString;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            string formatString = (ListBox.FormatString = value);
            filterListBox.FormatString = formatString;
        }
    }

    [Description("获取或设置指示显示值是否可以进行格式化操作。")]
    [Category("SunnyUI")]
    [DefaultValue(false)]
    public bool FormattingEnabled
    {
        get
        {
            return ListBox.FormattingEnabled;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            bool formattingEnabled = (ListBox.FormattingEnabled = value);
            filterListBox.FormattingEnabled = formattingEnabled;
        }
    }

    [Description("获取或设置要为此列表框实际值的属性。")]
    [Category("SunnyUI")]
    [DefaultValue("")]
    [Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
    public string ValueMember
    {
        get
        {
            return ListBox.ValueMember;
        }
        set
        {
            ListBox.ValueMember = value;
            ValueMemberBindingMemberInfo = new BindingMemberInfo(value);
        }
    }

    [DefaultValue(null)]
    [Browsable(false)]
    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
    [Bindable(true)]
    public object SelectedValue
    {
        get
        {
            if (!ShowFilter)
            {
                return ListBox.SelectedValue;
            }

            return filterSelectedValue;
        }
        set
        {
            if (!ShowFilter)
            {
                ListBox.SelectedValue = value;
            }
        }
    }

    [DefaultValue(typeof(Color), "White")]
    public Color ItemFillColor
    {
        get
        {
            return ListBox.FillColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color color2 = (ListBox.FillColor = value);
            filterListBox.FillColor = color2;
        }
    }

    [DefaultValue(typeof(Color), "48, 48, 48")]
    public Color ItemForeColor
    {
        get
        {
            return ListBox.ForeColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color color2 = (ListBox.ForeColor = value);
            filterListBox.ForeColor = color2;
        }
    }

    [DefaultValue(typeof(Color), "243, 249, 255")]
    public Color ItemSelectForeColor
    {
        get
        {
            return ListBox.ItemSelectForeColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color itemSelectForeColor = (ListBox.ItemSelectForeColor = value);
            filterListBox.ItemSelectForeColor = itemSelectForeColor;
        }
    }

    [DefaultValue(typeof(Color), "80, 160, 255")]
    public Color ItemSelectBackColor
    {
        get
        {
            return ListBox.ItemSelectBackColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color itemSelectBackColor = (ListBox.ItemSelectBackColor = value);
            filterListBox.ItemSelectBackColor = itemSelectBackColor;
        }
    }

    [DefaultValue(typeof(Color), "220, 236, 255")]
    public Color ItemHoverColor
    {
        get
        {
            return ListBox.HoverColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color hoverColor = (ListBox.HoverColor = value);
            filterListBox.HoverColor = hoverColor;
        }
    }

    [DefaultValue(typeof(Color), "80, 160, 255")]
    public Color ItemRectColor
    {
        get
        {
            return ListBox.RectColor;
        }
        set
        {
            UIListBox filterListBox = FilterListBox;
            Color color2 = (ListBox.RectColor = value);
            filterListBox.RectColor = color2;
        }
    }

    public event EventHandler SelectionChangeCommitted;

    public new event EventHandler TextChanged;

    public event EventHandler SelectedIndexChanged;

    public event EventHandler DataSourceChanged;

    public event EventHandler DisplayMemberChanged;

    public event EventHandler ValueMemberChanged;

    public event EventHandler SelectedValueChanged;
  

    public UiComboBox()
    {
        InitializeComponent();
        ListBox.SelectedIndexChanged += Box_SelectedIndexChanged;
        ListBox.ValueMemberChanged += Box_ValueMemberChanged;
        ListBox.SelectedValueChanged += ListBox_SelectedValueChanged;
        ListBox.ItemsClear += ListBox_ItemsClear;
        ListBox.ItemsRemove += ListBox_ItemsRemove;
        ListBox.MouseClick += ListBox_MouseClick;
        filterForm.BeforeListClick += ListBox_Click;
        edit.TextChanged += Edit_TextChanged;
        edit.KeyDown += Edit_KeyDown;
        DropDownWidth = 150;
        fullControlSelect = true;
        base.MouseWheel += UIComboBox_MouseWheel;
        CreateInstance();
    }

    private void UIComboBox_MouseWheel(object sender, MouseEventArgs e)
    {
        if (!ShowFilter && base.DropDownStyle == UIDropDownStyle.DropDownList)
        {
            if (e.Delta <= -100 && SelectedIndex < Items.Count)
            {
                SelectedIndex++;
            }

            if (e.Delta >= 100 && SelectedIndex > 0)
            {
                SelectedIndex--;
            }
        }
    }

    private void ListBox_MouseClick(object sender, MouseEventArgs e)
    {
        if (((UIListBox)sender).IndexFromPoint(e.X, e.Y) != -1)
        {
            this.SelectionChangeCommitted?.Invoke(this, EventArgs.Empty);
        }
    }

    public override void Clear()
    {
        base.Clear();
        if (DataSource != null)
        {
            DataSource = null;
        }
        else
        {
            ListBox.Items.Clear();
        }
    }

    private void ListBox_Click(object sender, EventArgs e)
    {
        SelectTextChange = true;
        filterSelectedItem = filterList[(int)sender];
        filterSelectedValue = GetItemValue(filterSelectedItem);
        Text = GetItemText(filterSelectedItem);
        edit.SelectionStart = Text.Length;
        this.SelectedValueChanged?.Invoke(this, EventArgs.Empty);
        SelectTextChange = false;
    }

    private void ShowDropDownFilter()
    {
        if (Text.IsNullOrEmpty() && ShowFilter)
        {
            FillFilterTextEmpty();
        }

        FilterItemForm.AutoClose = false;
        if (!FilterItemForm.Visible)
        {
            filterForm.Style = base.StyleDropDown;
            if (base.StyleDropDown != UIStyle.Inherited)
            {
                filterForm.Style = base.StyleDropDown;
            }
            else
            {
                filterForm.Style = UIStyles.Style;
            }

            FilterItemForm.Show(this, new Size((DropDownWidth < base.Width) ? base.Width : DropDownWidth, CalcItemFormHeight()));
            edit.Focus();
        }
    }

    private void Edit_KeyDown(object sender, KeyEventArgs e)
    {
        if (ShowFilter)
        {
            if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Up)
            {
                if (!FilterItemForm.Visible)
                {
                    ShowDropDownFilter();
                }

                int count = filterForm.ListBox.Items.Count;
                int selectedIndex = filterForm.ListBox.SelectedIndex;
                if (count > 0)
                {
                    if (e.KeyCode == Keys.Down && selectedIndex < count - 1)
                    {
                        filterForm.ListBox.SelectedIndex++;
                    }

                    if (e.KeyCode == Keys.Up && selectedIndex > 0)
                    {
                        filterForm.ListBox.SelectedIndex--;
                    }
                }
            }
            else if (e.KeyCode == Keys.Escape)
            {
                FilterItemForm.Close();
            }
            else if (e.KeyCode == Keys.Return)
            {
                if (FilterItemForm.Visible)
                {
                    int count2 = filterForm.ListBox.Items.Count;
                    int selectedIndex2 = filterForm.ListBox.SelectedIndex;
                    if (count2 > 0 && selectedIndex2 >= 0 && selectedIndex2 < count2)
                    {
                        SelectTextChange = true;
                        filterSelectedItem = filterList[selectedIndex2];
                        filterSelectedValue = GetItemValue(filterSelectedItem);
                        Text = GetItemText(filterSelectedItem);
                        edit.SelectionStart = Text.Length;
                        this.SelectedValueChanged?.Invoke(this, EventArgs.Empty);
                        SelectTextChange = false;
                    }

                    FilterItemForm.Close();
                }
                else
                {
                    ShowDropDownFilter();
                }
            }
            else
            {
                base.OnKeyDown(e);
            }
        }
        else if (e.KeyCode == Keys.Return)
        {
            ShowDropDown();
        }
        else if (e.KeyCode == Keys.Escape)
        {
            base.ItemForm.Close();
        }
        else
        {
            base.OnKeyDown(e);
        }
    }

    protected override void DropDownStyleChanged()
    {
        if (base.DropDownStyle == UIDropDownStyle.DropDownList)
        {
            showFilter = false;
        }
    }

    private void SetDataConnection()
    {
        if (ShowFilter && base.DropDownStyle == UIDropDownStyle.DropDown && DataSource != null && DisplayMember.IsValid())
        {
            dataManager = (CurrencyManager)BindingContext[DataSource, new BindingMemberInfo(DisplayMember).BindingPath];
        }
    }

    private object GetItemValue(object item)
    {
        if (dataManager == null)
        {
            return item;
        }

        if (ValueMember.IsNullOrWhiteSpace())
        {
            return null;
        }

        return dataManager.GetItemProperties().Find(ValueMemberBindingMemberInfo.BindingField, ignoreCase: true)?.GetValue(item);
    }

    public Control ExToolTipControl()
    {
        return edit;
    }

    public int FindString(string s)
    {
        return ListBox.FindString(s);
    }

    public int FindString(string s, int startIndex)
    {
        return ListBox.FindString(s, startIndex);
    }

    public int FindStringExact(string s)
    {
        return ListBox.FindStringExact(s);
    }

    public int FindStringExact(string s, int startIndex)
    {
        return ListBox.FindStringExact(s, startIndex);
    }

    private void ListBox_ItemsRemove(object sender, EventArgs e)
    {
        if (ListBox.Count == 0 && base.DropDownStyle == UIDropDownStyle.DropDownList)
        {
            Text = "";
            edit.Text = "";
        }
    }

    private void ListBox_ItemsClear(object sender, EventArgs e)
    {
        if (base.DropDownStyle == UIDropDownStyle.DropDownList)
        {
            Text = "";
            edit.Text = "";
        }
    }

    private void Edit_TextChanged(object sender, EventArgs e)
    {
        this.TextChanged?.Invoke(this, e);
        if (!ShowFilter)
        {
            if (!SelectTextChange)
            {
                if (Text.IsValid())
                {
                    ListBox.ListBox.Text = Text;
                    return;
                }

                SelectTextChange = true;
                SelectedIndex = -1;
                edit.Text = "";
                SelectTextChange = false;
            }
        }
        else
        {
            if (base.DropDownStyle == UIDropDownStyle.DropDownList)
            {
                return;
            }

            if (edit.Focused && Text.IsValid())
            {
                ShowDropDownFilter();
            }

            if (Text.IsValid())
            {
                string text = Text;
                if (TrimFilter)
                {
                    text = text.Trim();
                }

                filterForm.ListBox.Items.Clear();
                filterList.Clear();
                if (DataSource == null)
                {
                    foreach (object item in Items)
                    {
                        if (FilterIgnoreCase)
                        {
                            if (item.ToString().ToUpper().Contains(text.ToUpper()))
                            {
                                filterList.Add(item.ToString());
                                if (filterList.Count > FilterMaxCount)
                                {
                                    break;
                                }
                            }
                        }
                        else if (item.ToString().Contains(text))
                        {
                            filterList.Add(item.ToString());
                            if (filterList.Count > FilterMaxCount)
                            {
                                break;
                            }
                        }
                    }
                }
                else if (dataManager != null)
                {
                    for (int i = 0; i < Items.Count; i++)
                    {
                        if (FilterIgnoreCase)
                        {
                            if (GetItemText(dataManager.List[i]).ToUpper().Contains(text.ToUpper()))
                            {
                                filterList.Add(dataManager.List[i]);
                                if (filterList.Count > FilterMaxCount)
                                {
                                    break;
                                }
                            }
                        }
                        else if (GetItemText(dataManager.List[i]).Contains(text))
                        {
                            filterList.Add(dataManager.List[i]);
                            if (filterList.Count > FilterMaxCount)
                            {
                                break;
                            }
                        }
                    }
                }

                {
                    foreach (object filter in filterList)
                    {
                        filterForm.ListBox.Items.Add(GetItemText(filter));
                    }

                    return;
                }
            }

            FillFilterTextEmpty();
            filterSelectedItem = null;
            filterSelectedValue = null;
            this.SelectedValueChanged?.Invoke(this, EventArgs.Empty);
        }
    }

    private void FillFilterTextEmpty()
    {
        filterForm.ListBox.Items.Clear();
        filterList.Clear();
        if (DataSource == null)
        {
            foreach (object item in Items)
            {
                filterList.Add(item.ToString());
            }
        }
        else if (dataManager != null)
        {
            for (int i = 0; i < Items.Count; i++)
            {
                filterList.Add(dataManager.List[i]);
            }
        }

        foreach (object filter in filterList)
        {
            filterForm.ListBox.Items.Add(GetItemText(filter));
        }
    }

    private void ListBox_SelectedValueChanged(object sender, EventArgs e)
    {
        if (!ShowFilter)
        {
            this.SelectedValueChanged?.Invoke(this, e);
        }
    }

    private void Box_ValueMemberChanged(object sender, EventArgs e)
    {
        this.ValueMemberChanged?.Invoke(this, e);
    }

    private void Box_DisplayMemberChanged(object _, EventArgs e)
    {
        this.DisplayMemberChanged?.Invoke(this, e);
        SetDataConnection();
    }

    private void Box_DataSourceChanged(object _, EventArgs e)
    {
        this.DataSourceChanged?.Invoke(this, e);
        SetDataConnection();
    }

    private void Box_SelectedIndexChanged(object sender, EventArgs e)
    {
        SelectTextChange = true;
        if (!ShowFilter)
        {
            if (ListBox.SelectedItem != null)
            {
                Text = ListBox.GetItemText(ListBox.SelectedItem);
            }
            else
            {
                Text = "";
            }
        }

        SelectTextChange = false;
        if (!Wana_1)
        {
            this.SelectedIndexChanged?.Invoke(this, e);
           
        }
    }

    protected override void ItemForm_ValueChanged(object sender, object value)
    {
        Invalidate();
    }

    private void FilterItemForm_VisibleChanged(object sender, EventArgs e)
    {
        dropSymbol = base.SymbolNormal;
        if (filterItemForm.Visible)
        {
            dropSymbol = base.SymbolDropDown;
        }

        Invalidate();
    }

    protected override void CreateInstance()
    {
        base.ItemForm = new UIDropDown(dropForm);
    }

    protected override int CalcItemFormHeight()
    {
        int num = base.ItemForm.Height - base.ItemForm.ClientRectangle.Height;
        return 4 + Math.Min(ListBox.Items.Count, MaxDropDownItems) * ItemHeight + num;
    }

    private void UIComboBox_FontChanged(object sender, EventArgs e)
    {
        if (base.ItemForm != null)
        {
            ListBox.Font = Font;
        }

        if (filterForm != null)
        {
            filterForm.ListBox.Font = Font;
        }
    }

    public void ShowDropDown()
    {
        UIComboBox_ButtonClick(this, EventArgs.Empty);
    }

    public void HideDropDown()
    {
        try
        {
            if (!ShowFilter)
            {
                if (base.ItemForm != null && base.ItemForm.Visible)
                {
                    base.ItemForm.Close();
                }
            }
            else if (FilterItemForm != null && FilterItemForm.Visible)
            {
                FilterItemForm.Close();
            }
        }
        catch
        {
        }
    }

    private void UIComboBox_ButtonClick(object sender, EventArgs e)
    {
        if (NeedDrawClearButton)
        {
            NeedDrawClearButton = false;
            Text = "";
            if (!showFilter)
            {
                while (dropForm.ListBox.SelectedIndex != -1)
                {
                    dropForm.ListBox.SelectedIndex = -1;
                }
            }
            else
            {
                while (filterForm.ListBox.SelectedIndex != -1)
                {
                    filterForm.ListBox.SelectedIndex = -1;
                }
            }

            Invalidate();
        }
        else if (!ShowFilter)
        {
            if (Items.Count <= 0)
            {
                return;
            }

            int num = base.Width;
            if (DropDownAutoWidth)
            {
                if (DataSource == null)
                {
                    for (int i = 0; i < Items.Count; i++)
                    {
                        num = Math.Max(TextRenderer.MeasureText(Items[i].ToString(), Font).Width + ScrollBarInfo.VerticalScrollBarWidth() + 6, num);
                    }
                }
                else
                {
                    for (int j = 0; j < Items.Count; j++)
                    {
                        num = Math.Max(TextRenderer.MeasureText(dropForm.ListBox.GetItemText(Items[j]), Font).Width + ScrollBarInfo.VerticalScrollBarWidth() + 6, num);
                    }
                }
            }
            else
            {
                num = Math.Max(DropDownWidth, num);
            }

            if (base.StyleDropDown != UIStyle.Inherited)
            {
                dropForm.Style = base.StyleDropDown;
            }

            base.ItemForm.Show(this, new Size(num, CalcItemFormHeight()));
        }
        else
        {
            if (base.StyleDropDown != UIStyle.Inherited)
            {
                filterForm.Style = base.StyleDropDown;
            }

            if (FilterItemForm.Visible)
            {
                FilterItemForm.Close();
            }
            else
            {
                ShowDropDownFilter();
            }
        }
    }

    public override void SetStyleColor(UIBaseStyle uiColor)
    {
        base.SetStyleColor(uiColor);
        ListBox.SetStyleColor(uiColor.DropDownStyle);
        FilterListBox.SetStyleColor(uiColor.DropDownStyle);
    }

    public override void ResetText()
    {
        Clear();
    }

    public string GetItemText(object item)
    {
        return ListBox.GetItemText(item);
    }

    private void UIComboBox_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Return && !ShowFilter)
        {
            ShowDropDown();
        }
    }

    private void edit_Leave(object sender, EventArgs e)
    {
        HideDropDown();
    }

    protected override void Dispose(bool disposing)
    {
        if (disposing && components != null)
        {
            components.Dispose();
        }

        dropForm?.Dispose();
        filterForm?.Dispose();
        filterItemForm?.Dispose();
        base.Dispose(disposing);
    }

    private void InitializeComponent()
    {
        base.SuspendLayout();
        base.edit.Leave += new System.EventHandler(edit_Leave);
        base.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
        base.Name = "UIComboBox";
        base.KeyDown += new System.Windows.Forms.KeyEventHandler(UIComboBox_KeyDown);
        base.ButtonClick += new System.EventHandler(UIComboBox_ButtonClick);
        base.FontChanged += new System.EventHandler(UIComboBox_FontChanged);
        base.ResumeLayout(false);
        base.PerformLayout();
    }
}