980 lines
30 KiB
C#
980 lines
30 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) 2012-2021 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: UIListBox.cs
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* 文件说明: 列表框
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* 当前版本: V3.0
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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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* 2020-04-25: V2.2.4 更新主题配置类
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* 2020-05-21: V2.2.5 增加鼠标滑过高亮
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* 开发日志：https://www.cnblogs.com/yhuse/p/12933885.html
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* 2021-06-03: V3.0.4 修改对象绑定的显示问题
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* 2021-07-29: V3.0.5 增加多选行
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* 2021-07-30: V3.0.5 选中项显示方角
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* 2021-08-04: V3.0.5 增加Items变更的事件
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******************************************************************************/
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using System;
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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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using static System.Windows.Forms.ListBox;
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namespace Sunny.UI
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{
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[DefaultEvent("ItemClick")]
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[DefaultProperty("Items")]
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public sealed class UIListBox : UIPanel, IToolTip
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{
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private readonly ListBoxEx listbox = new ListBoxEx();
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private readonly UIScrollBar bar = new UIScrollBar();
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private readonly Timer timer;
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public UIListBox()
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{
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SetStyleFlags(true, false);
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ShowText = false;
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Padding = new Padding(2);
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bar.ValueChanged += Bar_ValueChanged;
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bar.Width = SystemInformation.VerticalScrollBarWidth + 2;
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bar.Parent = this;
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bar.Dock = DockStyle.None;
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bar.Style = UIStyle.Custom;
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bar.Visible = false;
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listbox.Parent = this;
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listbox.Dock = DockStyle.Fill;
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listbox.Show();
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listbox.Bar = bar;
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listbox.SelectedIndexChanged += Listbox_SelectedIndexChanged;
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listbox.SelectedValueChanged += Listbox_SelectedValueChanged;
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listbox.Click += Listbox_Click;
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listbox.MouseClick += Listbox_MouseClick;
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listbox.DoubleClick += Listbox_DoubleClick;
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listbox.BeforeDrawItem += Listbox_BeforeDrawItem;
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listbox.MouseDown += Listbox_MouseDown;
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listbox.MouseUp += Listbox_MouseUp;
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listbox.MouseMove += Listbox_MouseMove;
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listbox.DataSourceChanged += Listbox_DataSourceChanged;
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listbox.DisplayMemberChanged += Listbox_DisplayMemberChanged;
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listbox.ValueMemberChanged += Listbox_ValueMemberChanged;
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listbox.ItemsClear += Listbox_ItemsClear;
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listbox.ItemsAdd += Listbox_ItemsAdd;
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listbox.ItemsRemove += Listbox_ItemsRemove;
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listbox.ItemsInsert += Listbox_ItemsInsert;
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listbox.KeyPress += Listbox_KeyPress;
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listbox.KeyDown += Listbox_KeyDown;
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listbox.KeyUp += Listbox_KeyUp;
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listbox.MouseEnter += Listbox_MouseEnter;
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listbox.MouseLeave += Listbox_MouseLeave;
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timer = new Timer();
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timer.Tick += Timer_Tick;
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timer.Start();
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}
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protected override void Dispose(bool disposing)
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{
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base.Dispose(disposing);
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timer?.Stop();
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timer?.Dispose();
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}
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public new event EventHandler MouseLeave;
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public new event EventHandler MouseEnter;
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public new event KeyPressEventHandler KeyPress;
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public new event KeyEventHandler KeyDown;
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public new event KeyEventHandler KeyUp;
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private void Listbox_MouseLeave(object sender, EventArgs e)
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{
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MouseLeave?.Invoke(this, e);
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}
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private void Listbox_MouseEnter(object sender, EventArgs e)
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{
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MouseEnter?.Invoke(this, e);
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}
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private void Listbox_KeyUp(object sender, KeyEventArgs e)
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{
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KeyUp?.Invoke(this, e);
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}
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private void Listbox_KeyDown(object sender, KeyEventArgs e)
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{
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KeyDown?.Invoke(this, e);
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}
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private void Listbox_KeyPress(object sender, KeyPressEventArgs e)
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{
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KeyPress?.Invoke(this, e);
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}
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public Control ExToolTipControl()
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{
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return listbox;
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}
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private void Listbox_MouseClick(object sender, MouseEventArgs e)
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{
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MouseClick?.Invoke(this, e);
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}
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public new event MouseEventHandler MouseClick;
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public event EventHandler ItemsClear;
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public event EventHandler ItemsAdd;
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public event EventHandler ItemsRemove;
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public event EventHandler ItemsInsert;
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public void BeginUpdate()
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{
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listbox.BeginUpdate();
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}
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public void EndUpdate()
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{
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listbox.EndUpdate();
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}
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public void ClearSelected()
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{
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listbox.ClearSelected();
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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, int startIndex)
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{
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return listbox.FindStringExact(s, startIndex);
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}
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public Rectangle GetItemRectangle(int index)
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{
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return listbox.GetItemRectangle(index);
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}
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public bool GetSelected(int index)
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{
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return listbox.GetSelected(index);
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}
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public void SetSelected(int index, bool value)
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{
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listbox.SetSelected(index, value);
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}
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private void Listbox_ItemsInsert(object sender, EventArgs e)
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{
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ItemsInsert?.Invoke(this, e);
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}
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private void Listbox_ItemsRemove(object sender, EventArgs e)
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{
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ItemsRemove?.Invoke(this, e);
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}
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private void Listbox_ItemsAdd(object sender, EventArgs e)
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{
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ItemsAdd?.Invoke(this, e);
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}
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private void Listbox_ItemsClear(object sender, EventArgs e)
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{
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ItemsClear?.Invoke(this, e);
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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 FindStringExact(string s)
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{
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return listbox.FindStringExact(s);
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}
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[Browsable(false)]
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public ListBox ListBox => listbox;
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public int IndexFromPoint(Point p)
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{
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return listbox.IndexFromPoint(p);
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}
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public int IndexFromPoint(int x, int y)
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{
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return listbox.IndexFromPoint(x, y);
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}
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[DefaultValue(StringAlignment.Near)]
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[Description("列表项高度"), Category("SunnyUI")]
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public new StringAlignment TextAlignment
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{
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get => listbox.TextAlignment;
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set => listbox.TextAlignment = value;
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}
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[DefaultValue(SelectionMode.One)]
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[Description("选择项所用方法"), Category("SunnyUI")]
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public SelectionMode SelectionMode
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{
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get => listbox.SelectionMode;
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set => listbox.SelectionMode = value;
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}
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[DefaultValue(SelectionMode.One)]
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[Description("选择项所用方法"), Category("SunnyUI")]
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public SelectedIndexCollection SelectedIndices
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{
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get => listbox.SelectedIndices;
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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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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int TopIndex
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{
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get => listbox.TopIndex;
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set => listbox.TopIndex = value;
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}
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[DefaultValue(true)]
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public bool UseTabStops
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{
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get => listbox.UseTabStops;
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set => listbox.UseTabStops = value;
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public SelectedObjectCollection SelectedItems
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{
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get => listbox.SelectedItems;
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}
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protected override void OnContextMenuStripChanged(EventArgs e)
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{
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base.OnContextMenuStripChanged(e);
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listbox.ContextMenuStrip = ContextMenuStrip;
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}
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private void Listbox_MouseMove(object sender, MouseEventArgs e)
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{
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MouseMove?.Invoke(this, e);
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}
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private void Listbox_MouseUp(object sender, MouseEventArgs e)
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{
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MouseUp?.Invoke(this, e);
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}
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private void Listbox_MouseDown(object sender, MouseEventArgs e)
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{
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MouseDown?.Invoke(this, e);
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}
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public new event MouseEventHandler MouseDown;
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public new event MouseEventHandler MouseUp;
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public new event MouseEventHandler MouseMove;
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private void Timer_Tick(object sender, EventArgs e)
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{
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if (Items.Count == 0 && LastCount != 0)
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{
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LastCount = 0;
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timer.Stop();
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ItemsCountChange?.Invoke(this, e);
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timer.Start();
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}
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}
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protected override void OnFontChanged(EventArgs e)
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{
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base.OnFontChanged(e);
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listbox.Font = Font;
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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base.OnSizeChanged(e);
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bar.Top = 2;
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bar.Height = Height - 4;
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bar.Left = Width - bar.Width - 2;
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}
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private void Listbox_BeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e)
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{
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if (Items.Count != LastCount)
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{
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listbox.SetScrollInfo();
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LastCount = Items.Count;
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ItemsCountChange?.Invoke(this, EventArgs.Empty);
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}
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}
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private void Listbox_DoubleClick(object sender, EventArgs e)
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{
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if (SelectedItem != null)
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ItemDoubleClick?.Invoke(this, e);
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}
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private void Listbox_Click(object sender, EventArgs e)
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{
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if (SelectedItem != null)
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ItemClick?.Invoke(this, e);
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}
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public event EventHandler ItemClick;
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public event EventHandler ItemDoubleClick;
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public event EventHandler ItemsCountChange;
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public event EventHandler SelectedIndexChanged;
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public event EventHandler SelectedValueChanged;
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private void Listbox_SelectedValueChanged(object sender, EventArgs e)
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{
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SelectedValueChanged?.Invoke(this, e);
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Text = listbox.SelectedItem?.ToString();
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}
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private void Listbox_SelectedIndexChanged(object sender, EventArgs e)
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{
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SelectedIndexChanged?.Invoke(this, e);
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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 => listbox.ItemHeight = value;
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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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if (bar != null)
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{
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bar.ForeColor = uiColor.PrimaryColor;
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bar.HoverColor = uiColor.ButtonFillHoverColor;
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bar.PressColor = uiColor.ButtonFillPressColor;
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bar.FillColor = Color.White;
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}
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hoverColor = uiColor.TreeViewHoverColor;
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if (listbox != null)
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{
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listbox.HoverColor = hoverColor;
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listbox.SetStyleColor(uiColor);
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listbox.BackColor = Color.White;
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}
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fillColor = Color.White;
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}
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protected override void AfterSetFillColor(Color color)
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{
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base.AfterSetFillColor(color);
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if (listbox != null)
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{
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listbox.BackColor = color;
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}
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if (bar != null)
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{
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bar.FillColor = color;
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}
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}
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private int LastCount;
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private int lastBarValue = -1;
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private void Bar_ValueChanged(object sender, EventArgs e)
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{
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if (listbox != null)
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{
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if (bar.Value != lastBarValue)
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{
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ScrollBarInfo.SetScrollValue(listbox.Handle, bar.Value);
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lastBarValue = bar.Value;
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}
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}
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}
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protected override void OnRadiusChanged(int value)
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{
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base.OnRadiusChanged(value);
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Padding = new Padding(Math.Max(2, value / 2));
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}
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Localizable(true)]
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[Editor("System.Windows.Forms.Design.ListControlStringCollectionEditor", typeof(UITypeEditor))]
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[MergableProperty(false)]
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[Description("列表项"), Category("SunnyUI")]
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public ObjectCollection Items => listbox.Items;
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[Browsable(false)]
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public int Count => Items.Count;
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public void SelectedFirst()
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{
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listbox.SelectedFirst();
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}
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[DefaultValue(typeof(Color), "80, 160, 255")]
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[Description("列表项选中背景颜色"), Category("SunnyUI")]
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public Color ItemSelectBackColor
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{
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get => listbox.ItemSelectBackColor;
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set => listbox.ItemSelectBackColor = value;
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}
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[DefaultValue(typeof(Color), "White")]
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[Description("列表项选中字体颜色"), Category("SunnyUI")]
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public Color ItemSelectForeColor
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{
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get => listbox.ItemSelectForeColor;
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set => listbox.ItemSelectForeColor = value;
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}
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[Browsable(false)]
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[DefaultValue(-1)]
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public int SelectedIndex
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{
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get => listbox.SelectedIndex;
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set => listbox.SelectedIndex = value;
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}
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[Browsable(false)]
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[DefaultValue(null)]
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public object SelectedItem
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{
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get => listbox.SelectedItem;
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set => listbox.SelectedItem = value;
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}
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[Browsable(false)]
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[DefaultValue(null)]
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public object SelectedValue
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{
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get => listbox.SelectedValue;
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set => listbox.SelectedValue = value;
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}
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private Color hoverColor = Color.FromArgb(155, 200, 255);
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[DefaultValue(typeof(Color), "155, 200, 255")]
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[Description("列表项鼠标移上颜色"), Category("SunnyUI")]
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public Color HoverColor
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{
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get => hoverColor;
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set
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{
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hoverColor = value;
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listbox.HoverColor = hoverColor;
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_style = UIStyle.Custom;
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}
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}
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[DefaultValue("")]
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[Description("指示要为此控件中的项显示的属性")]
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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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[Editor("System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]
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public string DisplayMember
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{
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get => listbox.DisplayMember;
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set => listbox.DisplayMember = value;
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}
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[DefaultValue("")]
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[Description("指示用作控件中项的实际值的属性")]
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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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public string ValueMember
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{
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get => listbox.ValueMember;
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set => listbox.ValueMember = value;
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}
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[DefaultValue(null)]
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[RefreshProperties(RefreshProperties.Repaint)]
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[AttributeProvider(typeof(IListSource))]
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[Description("指示此控件将用来获取其项的列表")]
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public object DataSource
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{
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get => listbox.DataSource;
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set => listbox.DataSource = value;
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}
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private void Listbox_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 Listbox_DisplayMemberChanged(object sender, EventArgs e)
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{
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DisplayMemberChanged?.Invoke(this, e);
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}
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private void Listbox_DataSourceChanged(object sender, EventArgs e)
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{
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DataSourceChanged?.Invoke(this, e);
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}
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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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[DefaultValue(null)]
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[Description("格式说明符，指示显示值的方式")]
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public string FormatString
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{
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get => listbox.FormatString;
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set => 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 => listbox.FormattingEnabled = value;
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}
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public string GetItemText(object item)
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||
{
|
||
return listbox.GetItemText(item);
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// ListBox
|
||
/// </summary>
|
||
[ToolboxItem(false)]
|
||
public sealed class ListBoxEx : ListBox, IStyleInterface
|
||
{
|
||
private UIScrollBar bar;
|
||
|
||
/// <summary>
|
||
/// Tag字符串
|
||
/// </summary>
|
||
[DefaultValue(null)]
|
||
[Description("获取或设置包含有关控件的数据的对象字符串"), Category("SunnyUI")]
|
||
public string TagString { get; set; }
|
||
|
||
public UIScrollBar Bar
|
||
{
|
||
get => bar;
|
||
set
|
||
{
|
||
bar = value;
|
||
SetScrollInfo();
|
||
}
|
||
}
|
||
|
||
public int Count => Items.Count;
|
||
|
||
public ListBoxEx()
|
||
{
|
||
InitializeComponent();
|
||
|
||
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
|
||
SetStyle(ControlStyles.DoubleBuffer, true);
|
||
UpdateStyles();
|
||
this.DoubleBuffered();
|
||
|
||
BorderStyle = BorderStyle.None;
|
||
ForeColor = UIFontColor.Primary;
|
||
IntegralHeight = false;
|
||
Version = UIGlobal.Version;
|
||
SetScrollInfo();
|
||
}
|
||
|
||
public event EventHandler ItemsClear;
|
||
public event EventHandler ItemsAdd;
|
||
public event EventHandler ItemsRemove;
|
||
public event EventHandler ItemsInsert;
|
||
|
||
protected override void WndProc(ref Message m)
|
||
{
|
||
if (IsDisposed || Disposing) return;
|
||
if (IsHandleCreated)
|
||
{
|
||
const int LB_ADDSTRING = 0x0180;
|
||
const int LB_INSERTSTRING = 0x0181;
|
||
const int LB_DELETESTRING = 0x0182;
|
||
const int LB_RESETCONTENT = 0x0184;
|
||
if (m.Msg == LB_RESETCONTENT)
|
||
{
|
||
ItemsClear?.Invoke(this, EventArgs.Empty);
|
||
}
|
||
|
||
if (m.Msg == LB_DELETESTRING)
|
||
{
|
||
ItemsRemove?.Invoke(this, EventArgs.Empty);
|
||
}
|
||
|
||
if (m.Msg == LB_ADDSTRING)
|
||
{
|
||
ItemsAdd?.Invoke(this, EventArgs.Empty);
|
||
}
|
||
|
||
if (m.Msg == LB_INSERTSTRING)
|
||
{
|
||
ItemsInsert?.Invoke(this, EventArgs.Empty);
|
||
}
|
||
|
||
//if (m.Msg == Win32.User.WM_ERASEBKGND)
|
||
//{
|
||
// m.Result = IntPtr.Zero;
|
||
// return;
|
||
//}
|
||
}
|
||
|
||
base.WndProc(ref m);
|
||
}
|
||
|
||
protected override void OnSizeChanged(EventArgs e)
|
||
{
|
||
if (Bar != null && Bar.Visible)
|
||
{
|
||
if (Bar.Value != 0)
|
||
{
|
||
ScrollBarInfo.SetScrollValue(Handle, Bar.Value);
|
||
}
|
||
}
|
||
//SetScrollInfo();
|
||
}
|
||
|
||
public void SetScrollInfo()
|
||
{
|
||
if (Bar == null)
|
||
{
|
||
return;
|
||
}
|
||
|
||
var si = ScrollBarInfo.GetInfo(Handle);
|
||
if (si.ScrollMax > 0)
|
||
{
|
||
Bar.Maximum = si.ScrollMax;
|
||
Bar.Visible = si.ScrollMax > 0 && si.nMax > 0 && si.nPage > 0;
|
||
Bar.Value = si.nPos;
|
||
}
|
||
else
|
||
{
|
||
Bar.Visible = false;
|
||
}
|
||
}
|
||
|
||
public string Version { get; }
|
||
|
||
/// <summary>
|
||
/// 自定义主题风格
|
||
/// </summary>
|
||
[DefaultValue(false)]
|
||
[Description("获取或设置可以自定义主题风格"), Category("SunnyUI")]
|
||
public bool StyleCustomMode { get; set; }
|
||
|
||
#region 组件设计器生成的代码
|
||
|
||
/// <summary>
|
||
/// 设计器支持所需的方法 - 不要
|
||
/// 使用代码编辑器修改此方法的内容。
|
||
/// </summary>
|
||
private void InitializeComponent()
|
||
{
|
||
SuspendLayout();
|
||
//
|
||
// UIListBox
|
||
//
|
||
BorderStyle = BorderStyle.FixedSingle;
|
||
DrawMode = DrawMode.OwnerDrawFixed;
|
||
Font = UIFontColor.Font;
|
||
IntegralHeight = false;
|
||
ItemHeight = 25;
|
||
Size = new Size(150, 200);
|
||
ResumeLayout(false);
|
||
}
|
||
|
||
#endregion 组件设计器生成的代码
|
||
|
||
private UIStyle _style = UIStyle.Blue;
|
||
private Color _itemSelectBackColor = UIColor.Blue;
|
||
private Color _itemSelectForeColor = Color.White;
|
||
|
||
/// <summary>
|
||
/// 主题样式
|
||
/// </summary>
|
||
[DefaultValue(UIStyle.Blue), Description("主题样式"), Category("SunnyUI")]
|
||
public UIStyle Style
|
||
{
|
||
get => _style;
|
||
set => SetStyle(value);
|
||
}
|
||
|
||
protected override void OnMouseWheel(MouseEventArgs e)
|
||
{
|
||
base.OnMouseWheel(e);
|
||
|
||
if (Bar != null && Bar.Visible)
|
||
{
|
||
var si = ScrollBarInfo.GetInfo(Handle);
|
||
int temp = Math.Abs(e.Delta / 120);
|
||
if (e.Delta > 10)
|
||
{
|
||
int nposnum = si.nPos - temp * SystemInformation.MouseWheelScrollLines;
|
||
ScrollBarInfo.SetScrollValue(Handle, nposnum >= si.nMin ? nposnum : 0);
|
||
}
|
||
else if (e.Delta < -10)
|
||
{
|
||
int nposnum = si.nPos + temp * SystemInformation.MouseWheelScrollLines;
|
||
ScrollBarInfo.SetScrollValue(Handle, nposnum <= si.ScrollMax ? nposnum : si.ScrollMax);
|
||
}
|
||
SetScrollInfo();
|
||
}
|
||
}
|
||
|
||
public void SetStyle(UIStyle style)
|
||
{
|
||
UIBaseStyle uiColor = UIStyles.GetStyleColor(style);
|
||
if (!uiColor.IsCustom()) SetStyleColor(uiColor);
|
||
_style = style;
|
||
}
|
||
|
||
public void SetStyleColor(UIBaseStyle uiColor)
|
||
{
|
||
ItemSelectBackColor = uiColor.ListItemSelectBackColor;
|
||
ItemSelectForeColor = uiColor.ListItemSelectForeColor;
|
||
Invalidate();
|
||
}
|
||
|
||
[Category("SunnyUI"), Description("The border color used to paint the control.")]
|
||
public Color ItemSelectBackColor
|
||
{
|
||
get => _itemSelectBackColor;
|
||
set
|
||
{
|
||
if (_itemSelectBackColor != value)
|
||
{
|
||
_itemSelectBackColor = value;
|
||
_style = UIStyle.Custom;
|
||
if (DesignMode)
|
||
Invalidate();
|
||
}
|
||
}
|
||
}
|
||
|
||
[Category("SunnyUI"), Description("The border color used to paint the control.")]
|
||
public Color ItemSelectForeColor
|
||
{
|
||
get => _itemSelectForeColor;
|
||
set
|
||
{
|
||
if (_itemSelectForeColor != value)
|
||
{
|
||
_itemSelectForeColor = value;
|
||
_style = UIStyle.Custom;
|
||
if (DesignMode)
|
||
Invalidate();
|
||
}
|
||
}
|
||
}
|
||
|
||
public delegate void OnBeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e);
|
||
|
||
public event OnBeforeDrawItem BeforeDrawItem;
|
||
|
||
public event OnBeforeDrawItem AfterDrawItem;
|
||
|
||
private StringAlignment textAlignment = StringAlignment.Near;
|
||
|
||
public StringAlignment TextAlignment
|
||
{
|
||
get => textAlignment;
|
||
set
|
||
{
|
||
textAlignment = value;
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
protected override void OnDrawItem(DrawItemEventArgs e)
|
||
{
|
||
base.OnDrawItem(e);
|
||
|
||
BeforeDrawItem?.Invoke(this, Items, e);
|
||
if (Items.Count == 0)
|
||
{
|
||
return;
|
||
}
|
||
|
||
bool otherState = e.State == DrawItemState.Grayed || e.State == DrawItemState.HotLight;
|
||
if (!otherState)
|
||
{
|
||
e.DrawBackground();
|
||
}
|
||
|
||
if (e.Index < 0 || e.Index >= Items.Count)
|
||
{
|
||
return;
|
||
}
|
||
|
||
StringFormat sStringFormat = new StringFormat();
|
||
sStringFormat.LineAlignment = StringAlignment.Center;
|
||
sStringFormat.Alignment = textAlignment;
|
||
|
||
bool isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
|
||
Color backColor = isSelected ? ItemSelectBackColor : BackColor;
|
||
Color foreColor = isSelected ? ItemSelectForeColor : ForeColor;
|
||
|
||
Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width - 1, e.Bounds.Height - 1);
|
||
string showText;
|
||
if (DisplayMember.IsNullOrEmpty())
|
||
{
|
||
showText = Items[e.Index].ToString();
|
||
}
|
||
else
|
||
{
|
||
//var list = Items[e.Index].GetType().GetNeedProperties();
|
||
//foreach (var info in list)
|
||
//{
|
||
// if (info.Name == DisplayMember)
|
||
// {
|
||
// object defaultobj = info.GetValue(Items[e.Index], null);
|
||
// showText = defaultobj.ToString();
|
||
// }
|
||
//}
|
||
|
||
showText = GetItemText(Items[e.Index]);
|
||
if (showText.IsNullOrEmpty())
|
||
{
|
||
showText = Items[e.Index].ToString();
|
||
}
|
||
}
|
||
|
||
if (!otherState)
|
||
{
|
||
e.Graphics.FillRectangle(BackColor, e.Bounds);
|
||
e.Graphics.FillRectangle(backColor, rect);
|
||
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
|
||
}
|
||
else
|
||
{
|
||
if (e.State == DrawItemState.Grayed)
|
||
{
|
||
backColor = BackColor;
|
||
foreColor = ForeColor;
|
||
}
|
||
|
||
if (e.State == DrawItemState.HotLight)
|
||
{
|
||
backColor = HoverColor;
|
||
foreColor = ForeColor;
|
||
}
|
||
|
||
e.Graphics.FillRectangle(BackColor, e.Bounds);
|
||
e.Graphics.FillRectangle(backColor, rect);
|
||
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
|
||
}
|
||
|
||
AfterDrawItem?.Invoke(this, Items, e);
|
||
}
|
||
|
||
private Color hoverColor = Color.FromArgb(155, 200, 255);
|
||
|
||
[DefaultValue(typeof(Color), "155, 200, 255")]
|
||
public Color HoverColor
|
||
{
|
||
get => hoverColor;
|
||
set
|
||
{
|
||
hoverColor = value;
|
||
_style = UIStyle.Custom;
|
||
}
|
||
}
|
||
|
||
protected override void OnMeasureItem(MeasureItemEventArgs e)
|
||
{
|
||
base.OnMeasureItem(e);
|
||
e.ItemHeight += ItemHeight;
|
||
}
|
||
|
||
public void SelectedFirst()
|
||
{
|
||
if (Items.Count > 0 && SelectedIndex < 0)
|
||
{
|
||
SelectedIndex = 0;
|
||
}
|
||
}
|
||
|
||
private int lastIndex = -1;
|
||
private int mouseIndex = -1;
|
||
|
||
[Browsable(false)]
|
||
public int MouseIndex
|
||
{
|
||
get => mouseIndex;
|
||
set
|
||
{
|
||
if (mouseIndex != value)
|
||
{
|
||
if (lastIndex >= 0 && lastIndex >= 0 && lastIndex < Items.Count && lastIndex != SelectedIndex)
|
||
{
|
||
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(lastIndex), lastIndex, DrawItemState.Grayed));
|
||
}
|
||
|
||
mouseIndex = value;
|
||
if (mouseIndex >= 0 && mouseIndex >= 0 && mouseIndex < Items.Count && mouseIndex != SelectedIndex)
|
||
{
|
||
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(value), value, DrawItemState.HotLight));
|
||
}
|
||
|
||
lastIndex = mouseIndex;
|
||
}
|
||
}
|
||
}
|
||
|
||
protected override void OnMouseMove(MouseEventArgs e)
|
||
{
|
||
base.OnMouseMove(e);
|
||
if (SelectionMode != SelectionMode.One) return;
|
||
MouseIndex = IndexFromPoint(e.Location);
|
||
}
|
||
|
||
protected override void OnMouseLeave(EventArgs e)
|
||
{
|
||
base.OnMouseLeave(e);
|
||
if (SelectionMode != SelectionMode.One) return;
|
||
MouseIndex = -1;
|
||
}
|
||
}
|
||
} |