448 lines
14 KiB
C#
448 lines
14 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) 2012-2023 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: ListBoxEx.cs
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* 文件说明: 列表框基类
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* 当前版本: V3.1
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* 创建日期: 2022-05-12
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*
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* 2023-05-12: V3.3.6 增加文件说明
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* 2023-05-12: V3.3.6 重构DrawString函数
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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.Windows.Forms;
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namespace Sunny.UI
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{
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/// <summary>
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/// ListBox
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/// </summary>
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[ToolboxItem(false)]
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internal sealed class ListBoxEx : ListBox, IStyleInterface
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{
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private UIScrollBar bar;
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/// <summary>
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/// Tag字符串
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/// </summary>
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[DefaultValue(null)]
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[Description("获取或设置包含有关控件的数据的对象字符串"), Category("SunnyUI")]
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public string TagString { get; set; }
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private float DefaultFontSize = -1;
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public void SetDPIScale()
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{
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if (!UIDPIScale.NeedSetDPIFont()) return;
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if (DefaultFontSize < 0) DefaultFontSize = this.Font.Size;
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this.SetDPIScaleFont(DefaultFontSize);
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}
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public UIScrollBar Bar
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{
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get => bar;
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set
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{
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bar = value;
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SetScrollInfo();
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}
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}
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public int Count => Items.Count;
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public ListBoxEx()
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{
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InitializeComponent();
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.DoubleBuffer, true);
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UpdateStyles();
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this.DoubleBuffered();
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BorderStyle = BorderStyle.None;
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ForeColor = UIFontColor.Primary;
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IntegralHeight = false;
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Version = UIGlobal.Version;
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SetScrollInfo();
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}
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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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protected override void WndProc(ref Message m)
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{
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if (IsDisposed || Disposing) return;
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if (IsHandleCreated)
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{
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const int LB_ADDSTRING = 0x0180;
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const int LB_INSERTSTRING = 0x0181;
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const int LB_DELETESTRING = 0x0182;
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const int LB_RESETCONTENT = 0x0184;
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if (m.Msg == LB_RESETCONTENT)
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{
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ItemsClear?.Invoke(this, EventArgs.Empty);
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}
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if (m.Msg == LB_DELETESTRING)
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{
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ItemsRemove?.Invoke(this, EventArgs.Empty);
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}
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if (m.Msg == LB_ADDSTRING)
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{
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ItemsAdd?.Invoke(this, EventArgs.Empty);
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}
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if (m.Msg == LB_INSERTSTRING)
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{
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ItemsInsert?.Invoke(this, EventArgs.Empty);
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}
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//if (m.Msg == Win32.User.WM_ERASEBKGND)
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//{
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// m.Result = IntPtr.Zero;
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// return;
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//}
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}
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base.WndProc(ref m);
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}
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/// <summary>
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/// 重载控件尺寸变更
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/// </summary>
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/// <param name="e">参数</param>
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protected override void OnSizeChanged(EventArgs e)
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{
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if (Bar != null && Bar.Visible)
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{
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if (Bar.Value != 0)
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{
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ScrollBarInfo.SetScrollValue(Handle, Bar.Value);
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}
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}
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//SetScrollInfo();
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}
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protected override void OnSelectedIndexChanged(EventArgs e)
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{
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base.OnSelectedIndexChanged(e);
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SetScrollInfo();
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}
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public void SetScrollInfo()
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{
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if (Bar == null)
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{
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return;
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}
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var si = ScrollBarInfo.GetInfo(Handle);
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if (si.ScrollMax > 0)
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{
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Bar.Maximum = si.ScrollMax;
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Bar.Visible = si.ScrollMax > 0 && si.nMax > 0 && si.nPage > 0;
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Bar.Value = si.nPos;
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}
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else
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{
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Bar.Visible = false;
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}
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}
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public string Version { get; }
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/// <summary>
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/// 自定义主题风格
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/// </summary>
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[DefaultValue(false), Browsable(false)]
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[Description("获取或设置可以自定义主题风格"), Category("SunnyUI")]
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public bool StyleCustomMode { get; set; }
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#region 组件设计器生成的代码
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/// <summary>
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/// 设计器支持所需的方法 - 不要
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/// 使用代码编辑器修改此方法的内容。
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/// </summary>
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private void InitializeComponent()
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{
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SuspendLayout();
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//
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// UIListBox
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//
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BorderStyle = BorderStyle.FixedSingle;
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DrawMode = DrawMode.OwnerDrawFixed;
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base.Font = UIStyles.Font();
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IntegralHeight = false;
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ItemHeight = 25;
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Size = new Size(150, 200);
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ResumeLayout(false);
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}
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#endregion 组件设计器生成的代码
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private UIStyle _style = UIStyle.Blue;
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private Color _itemSelectBackColor = UIColor.Blue;
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private Color _itemSelectForeColor = Color.White;
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/// <summary>
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/// 主题样式
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/// </summary>
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[DefaultValue(UIStyle.Blue), Description("主题样式"), Category("SunnyUI")]
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public UIStyle Style
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{
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get => _style;
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set => SetStyle(value);
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}
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protected override void OnMouseWheel(MouseEventArgs e)
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{
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base.OnMouseWheel(e);
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if (Bar != null && Bar.Visible)
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{
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var si = ScrollBarInfo.GetInfo(Handle);
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int temp = Math.Abs(e.Delta / 120);
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if (e.Delta > 10)
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{
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int nposnum = si.nPos - temp * SystemInformation.MouseWheelScrollLines;
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ScrollBarInfo.SetScrollValue(Handle, nposnum >= si.nMin ? nposnum : 0);
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}
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else if (e.Delta < -10)
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{
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int nposnum = si.nPos + temp * SystemInformation.MouseWheelScrollLines;
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ScrollBarInfo.SetScrollValue(Handle, nposnum <= si.ScrollMax ? nposnum : si.ScrollMax);
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}
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SetScrollInfo();
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}
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}
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/// <summary>
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/// 设置主题样式
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/// </summary>
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/// <param name="style">主题样式</param>
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private void SetStyle(UIStyle style)
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{
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if (!style.IsCustom())
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{
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SetStyleColor(style.Colors());
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Invalidate();
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}
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_style = style == UIStyle.Inherited ? UIStyle.Inherited : UIStyle.Custom;
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}
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public void SetInheritedStyle(UIStyle style)
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{
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SetStyle(style);
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_style = UIStyle.Inherited;
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}
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public void SetStyleColor(UIBaseStyle uiColor)
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{
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ItemSelectBackColor = uiColor.ListItemSelectBackColor;
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ItemSelectForeColor = uiColor.ListItemSelectForeColor;
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}
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[Category("SunnyUI"), Description("The border color used to paint the control.")]
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public Color ItemSelectBackColor
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{
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get => _itemSelectBackColor;
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set
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{
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if (_itemSelectBackColor != value)
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{
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_itemSelectBackColor = value;
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_style = UIStyle.Custom;
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if (DesignMode)
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Invalidate();
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}
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}
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}
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[Category("SunnyUI"), Description("The border color used to paint the control.")]
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public Color ItemSelectForeColor
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{
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get => _itemSelectForeColor;
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set
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{
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if (_itemSelectForeColor != value)
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{
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_itemSelectForeColor = value;
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_style = UIStyle.Custom;
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if (DesignMode)
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Invalidate();
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}
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}
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}
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public delegate void OnBeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e);
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public event OnBeforeDrawItem BeforeDrawItem;
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public event OnBeforeDrawItem AfterDrawItem;
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private StringAlignment textAlignment = StringAlignment.Near;
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public StringAlignment TextAlignment
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{
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get => textAlignment;
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set
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{
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textAlignment = value;
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Invalidate();
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}
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}
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protected override void OnDrawItem(DrawItemEventArgs e)
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{
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BeforeDrawItem?.Invoke(this, Items, e);
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if (Items.Count == 0)
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{
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return;
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}
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bool otherState = e.State == DrawItemState.Grayed || e.State == DrawItemState.HotLight;
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if (!otherState)
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{
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e.DrawBackground();
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}
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if (e.Index < 0 || e.Index >= Items.Count)
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{
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return;
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}
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bool isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
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Color backColor = isSelected ? ItemSelectBackColor : BackColor;
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Color foreColor = isSelected ? ItemSelectForeColor : ForeColor;
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Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width - 1, e.Bounds.Height - 1);
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string showText = DisplayMember.IsNullOrEmpty() ? Items[e.Index].ToString() : GetItemText(Items[e.Index]);
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if (!otherState)
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{
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e.Graphics.FillRectangle(BackColor, e.Bounds);
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e.Graphics.FillRectangle(backColor, rect);
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e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, textAlignment, StringAlignment.Center);
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}
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else
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{
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if (e.State == DrawItemState.Grayed)
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{
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backColor = BackColor;
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foreColor = ForeColor;
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}
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if (e.State == DrawItemState.HotLight)
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{
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backColor = HoverColor;
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foreColor = ForeColor;
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}
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e.Graphics.FillRectangle(BackColor, e.Bounds);
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e.Graphics.FillRectangle(backColor, rect);
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e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, textAlignment, StringAlignment.Center);
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}
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AfterDrawItem?.Invoke(this, Items, e);
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base.OnDrawItem(e);
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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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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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_style = UIStyle.Custom;
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}
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}
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protected override void OnMeasureItem(MeasureItemEventArgs e)
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{
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base.OnMeasureItem(e);
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e.ItemHeight += ItemHeight;
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}
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public void SelectedFirst()
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{
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if (Items.Count > 0 && SelectedIndex < 0)
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{
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SelectedIndex = 0;
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}
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}
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private int lastIndex = -1;
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private int mouseIndex = -1;
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[Browsable(false)]
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public int MouseIndex
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{
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get => mouseIndex;
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set
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{
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if (mouseIndex != value)
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{
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if (lastIndex >= 0 && lastIndex >= 0 && lastIndex < Items.Count && lastIndex != SelectedIndex)
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{
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using var g = CreateGraphics();
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OnDrawItem(new DrawItemEventArgs(g, Font, GetItemRectangle(lastIndex), lastIndex, DrawItemState.Grayed));
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}
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mouseIndex = value;
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if (mouseIndex >= 0 && mouseIndex >= 0 && mouseIndex < Items.Count && mouseIndex != SelectedIndex)
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{
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using var g = CreateGraphics();
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OnDrawItem(new DrawItemEventArgs(g, Font, GetItemRectangle(value), value, DrawItemState.HotLight));
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}
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lastIndex = mouseIndex;
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}
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}
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}
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/// <summary>
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/// 重载鼠标移动事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseMove(MouseEventArgs e)
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{
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base.OnMouseMove(e);
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if (SelectionMode != SelectionMode.One) return;
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MouseIndex = IndexFromPoint(e.Location);
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}
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/// <summary>
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/// 重载鼠标离开事件
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/// </summary>
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/// <param name="e">鼠标参数</param>
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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if (SelectionMode != SelectionMode.One) return;
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MouseIndex = -1;
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}
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}
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}
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