659 lines
21 KiB
C#
659 lines
21 KiB
C#
/******************************************************************************
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* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
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* CopyRight (C) 2012-2022 ShenYongHua(沈永华).
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* QQ群：56829229 QQ：17612584 EMail：SunnyUI@QQ.Com
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*
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* Blog: https://www.cnblogs.com/yhuse
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* Gitee: https://gitee.com/yhuse/SunnyUI
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* GitHub: https://github.com/yhuse/SunnyUI
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*
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* SunnyUI.dll can be used for free under the GPL-3.0 license.
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* If you use this code, please keep this note.
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* 如果您使用此代码，请保留此说明。
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******************************************************************************
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* 文件名称: UIComboBox.cs
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* 文件说明: 组合框
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* 当前版本: V3.1
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* 创建日期: 2020-01-01
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*
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* 2020-01-01: V2.2.0 增加文件说明
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* 2020-06-11: V2.2.5 增加DataSource，支持数据绑定
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* 2021-05-06: V3.0.3 解决鼠标下拉选择，触发SelectedIndexChanged两次的问题
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* 2021-06-03: V3.0.4 更新了数据绑定相关代码
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* 2021-08-03: V3.0.5 Items.Clear后清除显示
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* 2021-08-15: V3.0.6 重写了水印文字的画法，并增加水印文字颜色
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* 2022-01-16: V3.1.0 增加了下拉框颜色设置
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* 2022-04-13: V3.1.3 根据Text自动选中SelectIndex
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* 2022-04-15: V3.1.3 增加过滤
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* 2022-04-16: V3.1.3 过滤下拉控跟随主题配色
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******************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Design;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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[DefaultProperty("Items")]
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[DefaultEvent("SelectedIndexChanged")]
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[ToolboxItem(true)]
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[LookupBindingProperties("DataSource", "DisplayMember", "ValueMember", "SelectedValue")]
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public sealed partial class UIComboBox : UIDropControl, IToolTip
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{
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public UIComboBox()
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{
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InitializeComponent();
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ListBox.SelectedIndexChanged += Box_SelectedIndexChanged;
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ListBox.ValueMemberChanged += Box_ValueMemberChanged;
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ListBox.SelectedValueChanged += ListBox_SelectedValueChanged;
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ListBox.ItemsClear += ListBox_ItemsClear;
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ListBox.ItemsRemove += ListBox_ItemsRemove;
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filterForm.BeforeListClick += ListBox_Click;
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edit.TextChanged += Edit_TextChanged;
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edit.KeyDown += Edit_KeyDown;
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DropDownWidth = 150;
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fullControlSelect = true;
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}
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private void ListBox_Click(object sender, EventArgs e)
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{
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SelectTextChange = true;
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filterSelectedItem = filterList[(int)sender];
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filterSelectedValue = GetItemText(filterSelectedItem);
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Text = filterSelectedValue.ToString();
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edit.SelectionStart = Text.Length;
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SelectedValueChanged?.Invoke(this, EventArgs.Empty);
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SelectTextChange = false;
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}
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private void ShowDropDownFilter()
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{
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FilterItemForm.AutoClose = false;
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if (!FilterItemForm.Visible)
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{
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FilterItemForm.Show(this, new Size(DropDownWidth < Width ? Width : DropDownWidth, CalcItemFormHeight()));
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edit.Focus();
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}
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}
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private void Edit_KeyDown(object sender, KeyEventArgs e)
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{
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if (ShowFilter)
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{
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int cnt = filterForm.ListBox.Items.Count;
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int idx = filterForm.ListBox.SelectedIndex;
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if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Up)
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{
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ShowDropDownFilter();
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if (cnt > 0)
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{
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if (e.KeyCode == Keys.Down)
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{
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if (idx < cnt - 1)
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filterForm.ListBox.SelectedIndex++;
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}
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if (e.KeyCode == Keys.Up)
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{
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if (idx > 0)
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filterForm.ListBox.SelectedIndex--;
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}
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}
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}
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else if (e.KeyCode == Keys.Escape)
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{
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FilterItemForm.Close();
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}
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else if (e.KeyCode == Keys.Return)
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{
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if (FilterItemForm.Visible)
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{
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if (cnt > 0 && idx >= 0 && idx < cnt)
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{
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SelectTextChange = true;
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filterSelectedItem = filterList[idx];
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filterSelectedValue = GetItemText(filterSelectedItem);
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Text = filterSelectedValue.ToString();
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edit.SelectionStart = Text.Length;
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SelectedValueChanged?.Invoke(this, EventArgs.Empty);
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SelectTextChange = false;
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}
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FilterItemForm.Close();
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}
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else
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{
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ShowDropDownFilter();
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}
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}
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else
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{
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base.OnKeyDown(e);
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}
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}
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else
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{
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if (e.KeyCode == Keys.Enter)
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{
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ShowDropDown();
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}
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else if (e.KeyCode == Keys.Escape)
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{
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ItemForm.Close();
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}
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else
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{
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base.OnKeyDown(e);
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}
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}
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}
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private object filterSelectedItem;
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private object filterSelectedValue;
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private bool showFilter;
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[DefaultValue(false)]
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[Description("显示过滤"), Category("SunnyUI")]
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public bool ShowFilter
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{
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get => showFilter;
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set
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{
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showFilter = value;
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if (value)
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{
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DropDownStyle = UIDropDownStyle.DropDown;
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}
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}
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}
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[DefaultValue(false)]
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[Description("过滤显示最大条目数"), Category("SunnyUI")]
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public int FilterMaxCount { get; set; } = 50;
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protected override void DropDownStyleChanged()
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{
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if (DropDownStyle == UIDropDownStyle.DropDownList)
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{
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showFilter = false;
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}
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}
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CurrencyManager dataManager;
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private void SetDataConnection()
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{
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if (DropDownStyle == UIDropDownStyle.DropDown && DataSource != null && DisplayMember.IsValid())
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{
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dataManager = (CurrencyManager)BindingContext[DataSource, new BindingMemberInfo(DisplayMember).BindingPath];
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}
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}
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public Control ExToolTipControl()
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{
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return edit;
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}
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[DefaultValue(false)]
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public bool Sorted
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{
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get => ListBox.Sorted;
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set => ListBox.Sorted = value;
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}
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public int FindString(string s)
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{
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return ListBox.FindString(s);
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}
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public int FindString(string s, int startIndex)
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{
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return ListBox.FindString(s, startIndex);
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}
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public int FindStringExact(string s)
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{
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return ListBox.FindStringExact(s);
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}
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public int FindStringExact(string s, int startIndex)
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{
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return ListBox.FindStringExact(s, startIndex);
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}
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private void ListBox_ItemsRemove(object sender, EventArgs e)
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{
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if (ListBox.Count == 0)
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{
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Text = "";
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edit.Text = "";
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}
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}
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private void ListBox_ItemsClear(object sender, EventArgs e)
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{
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Text = "";
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edit.Text = "";
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}
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public new event EventHandler TextChanged;
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private void Edit_TextChanged(object sender, EventArgs e)
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{
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TextChanged?.Invoke(this, e);
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if (DropDownStyle == UIDropDownStyle.DropDownList) return;
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if (!ShowFilter)
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{
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if (SelectTextChange) return;
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if (Text.IsValid())
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{
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ListBox.ListBox.Text = Text;
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}
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else
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{
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SelectTextChange = true;
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SelectedIndex = -1;
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edit.Text = "";
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SelectTextChange = false;
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}
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}
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else
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{
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if (edit.Focused && Text.IsValid())
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{
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ShowDropDownFilter();
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}
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filterForm.ListBox.Items.Clear();
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if (Text.IsValid())
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{
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filterList.Clear();
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if (DataSource == null)
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{
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foreach (var item in Items)
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{
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if (item.ToString().Contains(Text))
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{
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filterList.Add(item.ToString());
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if (filterList.Count > FilterMaxCount) break;
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}
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}
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}
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else
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{
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if (dataManager != null)
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{
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for (int i = 0; i < Items.Count; i++)
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{
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if (GetItemText(dataManager.List[i]).ToString().Contains(Text))
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{
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filterList.Add(dataManager.List[i]);
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if (filterList.Count > FilterMaxCount) break;
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}
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}
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}
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}
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foreach (var item in filterList)
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{
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filterForm.ListBox.Items.Add(GetItemText(item));
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}
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}
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else
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{
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filterSelectedItem = null;
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filterSelectedValue = null;
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}
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}
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}
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List<object> filterList = new List<object>();
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private void ListBox_SelectedValueChanged(object sender, EventArgs e)
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{
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if (!ShowFilter)
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SelectedValueChanged?.Invoke(this, e);
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}
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private void Box_ValueMemberChanged(object sender, EventArgs e)
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{
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ValueMemberChanged?.Invoke(this, e);
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}
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private void Box_DisplayMemberChanged(object sender, EventArgs e)
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{
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DisplayMemberChanged?.Invoke(this, e);
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SetDataConnection();
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}
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private void Box_DataSourceChanged(object sender, EventArgs e)
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{
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DataSourceChanged?.Invoke(this, e);
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SetDataConnection();
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}
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private bool SelectTextChange;
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private void Box_SelectedIndexChanged(object sender, EventArgs e)
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{
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SelectTextChange = true;
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if (ListBox.SelectedItem != null && !ShowFilter)
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Text = ListBox.GetItemText(ListBox.SelectedItem);
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SelectTextChange = false;
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SelectedIndexChanged?.Invoke(this, e);
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}
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public event EventHandler SelectedIndexChanged;
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public event EventHandler DataSourceChanged;
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public event EventHandler DisplayMemberChanged;
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public event EventHandler ValueMemberChanged;
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public event EventHandler SelectedValueChanged;
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protected override void ItemForm_ValueChanged(object sender, object value)
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{
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Invalidate();
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}
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private readonly UIComboBoxItem dropForm = new UIComboBoxItem();
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private readonly UIComboBoxItem filterForm = new UIComboBoxItem();
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private UIDropDown filterItemForm;
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private UIDropDown FilterItemForm
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{
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get
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{
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if (filterItemForm == null)
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{
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filterItemForm = new UIDropDown(filterForm);
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if (filterItemForm != null)
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{
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filterItemForm.VisibleChanged += FilterItemForm_VisibleChanged;
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}
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}
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return filterItemForm;
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}
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}
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private void FilterItemForm_VisibleChanged(object sender, EventArgs e)
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{
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dropSymbol = SymbolNormal;
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if (filterItemForm.Visible)
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{
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dropSymbol = SymbolDropDown;
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}
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Invalidate();
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}
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protected override void CreateInstance()
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{
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ItemForm = new UIDropDown(dropForm);
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}
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protected override int CalcItemFormHeight()
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{
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int interval = ItemForm.Height - ItemForm.ClientRectangle.Height;
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return 4 + Math.Min(ListBox.Items.Count, MaxDropDownItems) * ItemHeight + interval;
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}
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private UIListBox ListBox
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{
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get => dropForm.ListBox;
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}
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private UIListBox FilterListBox
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{
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get => filterForm.ListBox;
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}
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[DefaultValue(25)]
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[Description("列表项高度"), Category("SunnyUI")]
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public int ItemHeight
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{
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get => ListBox.ItemHeight;
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set => FilterListBox.ItemHeight = ListBox.ItemHeight = value;
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}
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[DefaultValue(8)]
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[Description("列表下拉最大个数"), Category("SunnyUI")]
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public int MaxDropDownItems { get; set; } = 8;
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private void UIComboBox_FontChanged(object sender, EventArgs e)
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{
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if (ItemForm != null)
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{
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ListBox.Font = Font;
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}
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if (filterForm != null)
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{
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filterForm.ListBox.Font = Font;
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}
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}
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public void ShowDropDown()
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{
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UIComboBox_ButtonClick(this, EventArgs.Empty);
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}
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private void UIComboBox_ButtonClick(object sender, EventArgs e)
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{
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if (!ShowFilter)
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{
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if (Items.Count > 0)
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{
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ItemForm.Show(this, new Size(DropDownWidth < Width ? Width : DropDownWidth, CalcItemFormHeight()));
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}
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}
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else
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{
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if (FilterItemForm.Visible)
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{
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FilterItemForm.Close();
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}
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else
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{
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ShowDropDownFilter();
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}
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}
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}
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public override void SetStyleColor(UIBaseStyle uiColor)
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{
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base.SetStyleColor(uiColor);
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ListBox.SetStyleColor(uiColor.DropDownStyle);
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FilterListBox.SetStyleColor(uiColor.DropDownStyle);
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}
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public object DataSource
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{
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get => ListBox.DataSource;
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set
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{
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ListBox.DataSource = value;
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Box_DataSourceChanged(this, EventArgs.Empty);
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}
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}
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[DefaultValue(150)]
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[Description("下拉框宽度"), Category("SunnyUI")]
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public int DropDownWidth { get; set; }
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Localizable(true)]
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[Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
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[MergableProperty(false)]
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[Description("列表项"), Category("SunnyUI")]
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public ListBox.ObjectCollection Items => ListBox.Items;
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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[Description("选中索引"), Category("SunnyUI")]
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public int SelectedIndex
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{
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get => ShowFilter ? -1 : ListBox.SelectedIndex;
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set
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{
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if (!ShowFilter)
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{
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ListBox.SelectedIndex = value;
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}
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}
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}
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[Browsable(false), Bindable(true), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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[Description("选中项"), Category("SunnyUI")]
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public object SelectedItem
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{
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get => ShowFilter ? filterSelectedItem : ListBox.SelectedItem;
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set
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{
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if (!ShowFilter)
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{
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ListBox.SelectedItem = value;
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}
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}
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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[Description("选中文字"), Category("SunnyUI")]
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public string SelectedText
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{
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get
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{
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if (DropDownStyle == UIDropDownStyle.DropDown)
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{
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return edit.SelectedText;
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}
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else
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{
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return Text;
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}
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}
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}
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public override void ResetText()
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{
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Clear();
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}
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[Description("获取或设置要为此列表框显示的属性。"), Category("SunnyUI")]
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[DefaultValue("")]
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[Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
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[TypeConverter("System.Windows.Forms.Design.DataMemberFieldConverter, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
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public string DisplayMember
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{
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get => ListBox.DisplayMember;
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set
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{
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ListBox.DisplayMember = value;
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Box_DisplayMemberChanged(this, EventArgs.Empty);
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}
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}
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[Description("获取或设置指示显示值的方式的格式说明符字符。"), Category("SunnyUI")]
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[DefaultValue("")]
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[Editor("System.Windows.Forms.Design.FormatStringEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
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[MergableProperty(false)]
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public string FormatString
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{
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get => ListBox.FormatString;
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set => FilterListBox.FormatString = ListBox.FormatString = value;
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}
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[Description("获取或设置指示显示值是否可以进行格式化操作。"), Category("SunnyUI")]
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[DefaultValue(false)]
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public bool FormattingEnabled
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{
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get => ListBox.FormattingEnabled;
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set => FilterListBox.FormattingEnabled = ListBox.FormattingEnabled = value;
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||
}
|
||
|
||
[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 => ListBox.ValueMember;
|
||
set => ListBox.ValueMember = value;
|
||
}
|
||
|
||
[
|
||
DefaultValue(null),
|
||
Browsable(false),
|
||
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
|
||
Bindable(true)
|
||
]
|
||
public object SelectedValue
|
||
{
|
||
get => ShowFilter ? filterSelectedValue : ListBox.SelectedValue;
|
||
set
|
||
{
|
||
if (!ShowFilter)
|
||
ListBox.SelectedValue = value;
|
||
}
|
||
}
|
||
|
||
public string GetItemText(object item)
|
||
{
|
||
return ListBox.GetItemText(item);
|
||
}
|
||
|
||
private void UIComboBox_KeyDown(object sender, KeyEventArgs e)
|
||
{
|
||
if (e.KeyCode == Keys.Enter && !ShowFilter)
|
||
{
|
||
ShowDropDown();
|
||
}
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "White")]
|
||
public Color ItemFillColor
|
||
{
|
||
get => ListBox.FillColor;
|
||
set => FilterListBox.FillColor = ListBox.FillColor = value;
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "48, 48, 48")]
|
||
public Color ItemForeColor
|
||
{
|
||
get => ListBox.ForeColor;
|
||
set => FilterListBox.ForeColor = ListBox.ForeColor = value;
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "243, 249, 255")]
|
||
public Color ItemSelectForeColor
|
||
{
|
||
get => ListBox.ItemSelectForeColor;
|
||
set => FilterListBox.ItemSelectForeColor = ListBox.ItemSelectForeColor = value;
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "80, 160, 255")]
|
||
public Color ItemSelectBackColor
|
||
{
|
||
get => ListBox.ItemSelectBackColor;
|
||
set => FilterListBox.ItemSelectBackColor = ListBox.ItemSelectBackColor = value;
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "220, 236, 255")]
|
||
public Color ItemHoverColor
|
||
{
|
||
get => ListBox.HoverColor;
|
||
set => FilterListBox.HoverColor = ListBox.HoverColor = value;
|
||
}
|
||
}
|
||
} |