789 lines
26 KiB
C#
789 lines
26 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: UITreeView.cs
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* 文件说明: 树形列表
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* 当前版本: V3.0
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* 创建日期: 2020-05-05
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*
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* 2020-05-05: V2.2.5 增加文件
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* 2020-07-07: V2.2.6 全部重写，增加圆角，CheckBoxes等
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* 2020-08-12: V2.2.7 更新可设置背景色
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******************************************************************************/
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using System;
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using System.Collections;
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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.Drawing.Drawing2D;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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public sealed class UITreeView : UIPanel
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{
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private UIScrollBar Bar;
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private bool ScrollBarVisible;
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private TreeViewEx view;
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public UITreeView()
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{
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InitializeComponent();
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ShowText = false;
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SetScrollInfo();
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view.BeforeCheck += View_BeforeCheck;
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view.AfterCheck += View_AfterCheck;
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view.BeforeCollapse += View_BeforeCollapse;
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view.AfterCollapse += View_AfterCollapse;
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view.BeforeExpand += View_BeforeExpand;
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view.AfterExpand += View_AfterExpand;
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view.DrawNode += View_DrawNode;
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view.ItemDrag += View_ItemDrag;
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view.NodeMouseHover += View_NodeMouseHover;
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view.BeforeSelect += View_BeforeSelect;
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view.AfterSelect += View_AfterSelect;
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view.NodeMouseClick += View_NodeMouseClick;
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view.NodeMouseDoubleClick += View_NodeMouseDoubleClick;
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}
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public override void SetStyleColor(UIBaseStyle uiColor)
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{
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if (uiColor.IsCustom()) return;
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if (view != null)
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{
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view.SelectedForeColor = UIColor.White;
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view.FillColor = view.BackColor = fillColor = UIColor.White;
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rectColor = uiColor.RectColor;
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view.SelectedColor = uiColor.TreeViewSelectedColor;
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view.ForeColor = foreColor = UIFontColor.Primary;
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view.HoverColor = uiColor.TreeViewHoverColor;
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}
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if (Bar != null)
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{
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Bar.FillColor = UIColor.White;
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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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}
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Invalidate();
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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 (view != null)
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{
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view.FillColor = color;
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view.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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protected override void AfterSetForeColor(Color color)
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{
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base.AfterSetForeColor(color);
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view.ForeColor = color;
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}
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[DefaultValue(TreeViewDrawMode.OwnerDrawAll)]
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public TreeViewDrawMode DrawMode
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{
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get => view.DrawMode;
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set => view.DrawMode = value;
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}
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[DefaultValue(false)]
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public bool CheckBoxes
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{
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get => view.CheckBoxes;
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set => view.CheckBoxes = value;
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}
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[DefaultValue(false)]
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public bool ShowLines
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{
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get => view.ShowLinesEx;
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set => view.ShowLinesEx = value;
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}
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[DefaultValue(28)]
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public int ItemHeight
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{
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get => view.ItemHeight;
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set => view.ItemHeight = value;
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}
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[Browsable(false)]
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public TreeNode SelectedNode
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{
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get => view.SelectedNode;
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set => view.SelectedNode = value;
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}
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[DefaultValue(true)]
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public bool HideSelection
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{
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get => view.HideSelection;
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set => view.HideSelection = value;
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}
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[DefaultValue(-1)]
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[Localizable(true)]
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[RefreshProperties(RefreshProperties.Repaint)]
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[TypeConverter(typeof(NoneExcludedImageIndexConverter))]
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[Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
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typeof(UITypeEditor))]
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[RelatedImageList("ImageList")]
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public int ImageIndex
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{
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get => view.ImageIndex;
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set => view.ImageIndex = value;
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}
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[Localizable(true)]
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[TypeConverter(typeof(ImageKeyConverter))]
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[Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
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typeof(UITypeEditor))]
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[DefaultValue("")]
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[RefreshProperties(RefreshProperties.Repaint)]
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[RelatedImageList("ImageList")]
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public string ImageKey
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{
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get => view.ImageKey;
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set => view.ImageKey = value;
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}
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[DefaultValue(null)]
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[RefreshProperties(RefreshProperties.Repaint)]
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public ImageList ImageList
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{
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get => view.ImageList;
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set => view.ImageList = value;
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}
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[DefaultValue(null)]
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public ImageList StateImageList
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{
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get => view.StateImageList;
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set => view.StateImageList = value;
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}
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[Localizable(true)]
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[DefaultValue(19)]
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public int Indent
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{
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get => view.Indent;
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set => view.Indent = value;
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}
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[DefaultValue(typeof(Color), "Black")]
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public Color LineColor
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{
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get => view.LineColor;
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set => view.LineColor = value;
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}
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[DefaultValue("\\")]
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public string PathSeparator
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{
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get => view.PathSeparator;
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set => view.PathSeparator = value;
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}
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[DefaultValue(-1)]
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[TypeConverter(typeof(NoneExcludedImageIndexConverter))]
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[Localizable(true)]
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[Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
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typeof(UITypeEditor))]
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[RelatedImageList("ImageList")]
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public int SelectedImageIndex
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{
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get => view.SelectedImageIndex;
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set => view.SelectedImageIndex = value;
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}
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[Localizable(true)]
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[TypeConverter(typeof(ImageKeyConverter))]
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[Editor("System.Windows.Forms.Design.ImageIndexEditor, System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
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typeof(UITypeEditor))]
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[DefaultValue("")]
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[RefreshProperties(RefreshProperties.Repaint)]
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[RelatedImageList("ImageList")]
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public string SelectedImageKey
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{
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get => view.SelectedImageKey;
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set => view.SelectedImageKey = value;
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}
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[DefaultValue(false)]
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public bool ShowNodeToolTips
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{
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get => view.ShowNodeToolTips;
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set => view.ShowNodeToolTips = value;
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}
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[DefaultValue(true)]
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public bool ShowPlusMinus
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{
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get => view.ShowPlusMinus;
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set => view.ShowPlusMinus = value;
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}
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[DefaultValue(false)]
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[Browsable(false)]
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[EditorBrowsable(EditorBrowsableState.Never)]
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public bool Sorted
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{
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get => view.Sorted;
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set => view.Sorted = value;
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}
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public IComparer TreeViewNodeSorter
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{
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get => view.TreeViewNodeSorter;
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set => view.TreeViewNodeSorter = value;
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}
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public TreeNode TopNode
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{
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get => view.TopNode;
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set => view.TopNode = value;
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}
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[Browsable(false)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public int VisibleCount => view.VisibleCount;
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Localizable(true)]
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[MergableProperty(false)]
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public TreeNodeCollection Nodes => view.Nodes;
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public event TreeViewCancelEventHandler BeforeCheck;
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public event TreeViewEventHandler AfterCheck;
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public event TreeViewCancelEventHandler BeforeCollapse;
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public event TreeViewEventHandler AfterCollapse;
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public event TreeViewCancelEventHandler BeforeExpand;
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public event TreeViewEventHandler AfterExpand;
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public event DrawTreeNodeEventHandler DrawNode;
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public event ItemDragEventHandler ItemDrag;
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public event TreeNodeMouseHoverEventHandler NodeMouseHover;
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public event TreeViewCancelEventHandler BeforeSelect;
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public event TreeViewEventHandler AfterSelect;
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public event TreeNodeMouseClickEventHandler NodeMouseClick;
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public event TreeNodeMouseClickEventHandler NodeMouseDoubleClick;
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private void View_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
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{
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NodeMouseDoubleClick?.Invoke(sender, e);
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}
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private void View_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
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{
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NodeMouseClick?.Invoke(sender, e);
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}
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private void View_AfterSelect(object sender, TreeViewEventArgs e)
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{
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AfterSelect?.Invoke(sender, e);
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}
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private void View_BeforeSelect(object sender, TreeViewCancelEventArgs e)
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{
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BeforeSelect?.Invoke(sender, e);
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}
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private void View_NodeMouseHover(object sender, TreeNodeMouseHoverEventArgs e)
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{
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NodeMouseHover?.Invoke(sender, e);
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}
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private void View_ItemDrag(object sender, ItemDragEventArgs e)
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{
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ItemDrag?.Invoke(sender, e);
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}
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private void View_DrawNode(object sender, DrawTreeNodeEventArgs e)
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{
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DrawNode?.Invoke(sender, e);
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}
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private void View_AfterExpand(object sender, TreeViewEventArgs e)
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{
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AfterExpand?.Invoke(sender, e);
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}
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private void View_BeforeExpand(object sender, TreeViewCancelEventArgs e)
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{
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BeforeExpand?.Invoke(sender, e);
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}
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private void View_AfterCollapse(object sender, TreeViewEventArgs e)
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{
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AfterCollapse?.Invoke(sender, e);
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}
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private void View_BeforeCollapse(object sender, TreeViewCancelEventArgs e)
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{
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BeforeCollapse?.Invoke(sender, e);
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}
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private void View_AfterCheck(object sender, TreeViewEventArgs e)
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{
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AfterCheck?.Invoke(sender, e);
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}
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private void View_BeforeCheck(object sender, TreeViewCancelEventArgs e)
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{
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BeforeCheck?.Invoke(sender, e);
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}
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public void BeginUpdate()
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{
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view.BeginUpdate();
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}
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public void CollapseAll()
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{
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view.CollapseAll();
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}
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public void EndUpdate()
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{
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view.EndUpdate();
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}
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public void ExpandAll()
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{
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view.ExpandAll();
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}
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public TreeViewHitTestInfo HitTest(Point pt)
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{
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return view.HitTest(pt);
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}
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public TreeViewHitTestInfo HitTest(int x, int y)
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{
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return view.HitTest(x, y);
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}
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public int GetNodeCount(bool includeSubTrees)
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{
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return view.GetNodeCount(includeSubTrees);
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}
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public TreeNode GetNodeAt(Point pt)
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{
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return view.GetNodeAt(pt);
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}
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public TreeNode GetNodeAt(int x, int y)
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{
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return view.GetNodeAt(x, y);
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}
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public override string ToString()
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{
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return view.ToString();
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}
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public void Sort()
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{
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view.Sort();
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}
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private void SetPos()
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{
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if (view == null) return;
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view.Left = 2;
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view.Top = 2;
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view.Width = Width - 4;
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view.Height = Height - 4;
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if (Bar == null) return;
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Bar.Top = 2;
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Bar.Left = Width - ScrollBarInfo.VerticalScrollBarWidth() - 2;
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Bar.Width = ScrollBarInfo.VerticalScrollBarWidth();
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Bar.Height = Height - 4;
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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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if (view != null) view.Font = Font;
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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 (e.Delta > 10)
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ScrollBarInfo.ScrollUp(view.Handle);
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else if (e.Delta < -10) ScrollBarInfo.ScrollDown(view.Handle);
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SetScrollInfo();
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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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SetScrollInfo();
|
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SetPos();
|
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}
|
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|
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public void SetScrollInfo()
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{
|
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if (view == null || Bar == null) return;
|
||
|
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if (Nodes.Count == 0)
|
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{
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Bar.Visible = false;
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return;
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}
|
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var si = ScrollBarInfo.GetInfo(view.Handle);
|
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SetPos();
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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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Bar.BringToFront();
|
||
|
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if (ScrollBarVisible != Bar.Visible)
|
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{
|
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ScrollBarVisible = Bar.Visible;
|
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Invalidate();
|
||
}
|
||
}
|
||
|
||
private void InitializeComponent()
|
||
{
|
||
view = new TreeViewEx();
|
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Bar = new UIScrollBar();
|
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SuspendLayout();
|
||
//
|
||
// view
|
||
//
|
||
view.BackColor = Color.White;
|
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view.BorderStyle = BorderStyle.None;
|
||
view.DrawMode = TreeViewDrawMode.OwnerDrawAll;
|
||
view.ForeColor = Color.FromArgb(48, 48, 48);
|
||
view.FullRowSelect = true;
|
||
view.ItemHeight = 28;
|
||
view.Location = new Point(2, 2);
|
||
view.Name = "view";
|
||
view.ShowLines = false;
|
||
view.Size = new Size(266, 176);
|
||
view.TabIndex = 0;
|
||
view.AfterCollapse += view_AfterCollapse;
|
||
view.AfterExpand += view_AfterExpand;
|
||
view.DrawNode += view_DrawNode;
|
||
//
|
||
// Bar
|
||
//
|
||
Bar.Font = new Font("微软雅黑", 12F);
|
||
Bar.Location = new Point(247, 3);
|
||
Bar.Name = "Bar";
|
||
Bar.Size = new Size(19, 173);
|
||
Bar.Style = UIStyle.Custom;
|
||
Bar.StyleCustomMode = true;
|
||
Bar.TabIndex = 2;
|
||
Bar.Visible = false;
|
||
Bar.ValueChanged += Bar_ValueChanged;
|
||
//
|
||
// UITreeViewEx
|
||
//
|
||
Controls.Add(Bar);
|
||
Controls.Add(view);
|
||
FillColor = Color.White;
|
||
Style = UIStyle.Custom;
|
||
ResumeLayout(false);
|
||
}
|
||
|
||
private void Bar_ValueChanged(object sender, EventArgs e)
|
||
{
|
||
ScrollBarInfo.SetScrollValue(view.Handle, Bar.Value);
|
||
}
|
||
|
||
private void view_AfterExpand(object sender, TreeViewEventArgs e)
|
||
{
|
||
SetScrollInfo();
|
||
}
|
||
|
||
private void view_AfterCollapse(object sender, TreeViewEventArgs e)
|
||
{
|
||
SetScrollInfo();
|
||
}
|
||
|
||
private void view_DrawNode(object sender, DrawTreeNodeEventArgs e)
|
||
{
|
||
SetScrollInfo();
|
||
}
|
||
|
||
internal sealed class NoneExcludedImageIndexConverter : ImageIndexConverter
|
||
{
|
||
protected override bool IncludeNoneAsStandardValue => false;
|
||
}
|
||
|
||
internal class TreeViewEx : TreeView
|
||
{
|
||
private TreeNode CurrentNode;
|
||
|
||
private bool showLines;
|
||
|
||
public TreeViewEx()
|
||
{
|
||
DrawMode = TreeViewDrawMode.OwnerDrawAll;
|
||
base.DoubleBuffered = true;
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "155, 200, 255")]
|
||
public Color HoverColor { get; set; } = Color.FromArgb(155, 200, 255);
|
||
|
||
public Color SelectedColor { get; set; } = Color.FromArgb(80, 160, 255);
|
||
|
||
public Color SelectedForeColor { get; set; } = Color.White;
|
||
|
||
public Color FillColor { get; set; } = Color.White;
|
||
|
||
public bool ShowLinesEx
|
||
{
|
||
get => showLines;
|
||
set
|
||
{
|
||
showLines = value;
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
protected override void OnMouseMove(MouseEventArgs e)
|
||
{
|
||
base.OnMouseMove(e);
|
||
var node = GetNodeAt(e.Location);
|
||
if (node == null || CurrentNode == node) return;
|
||
|
||
var g = CreateGraphics();
|
||
if (CurrentNode != null)
|
||
OnDrawNode(new DrawTreeNodeEventArgs(g, CurrentNode,
|
||
new Rectangle(0, CurrentNode.Bounds.Y, Width, CurrentNode.Bounds.Height),
|
||
TreeNodeStates.Default));
|
||
|
||
CurrentNode = node;
|
||
OnDrawNode(new DrawTreeNodeEventArgs(g, CurrentNode,
|
||
new Rectangle(0, CurrentNode.Bounds.Y, Width, CurrentNode.Bounds.Height), TreeNodeStates.Hot));
|
||
g.Dispose();
|
||
}
|
||
|
||
protected override void OnMouseLeave(EventArgs e)
|
||
{
|
||
var g = CreateGraphics();
|
||
if (CurrentNode != null)
|
||
{
|
||
OnDrawNode(new DrawTreeNodeEventArgs(g, CurrentNode,
|
||
new Rectangle(0, CurrentNode.Bounds.Y, Width, CurrentNode.Bounds.Height),
|
||
TreeNodeStates.Default));
|
||
CurrentNode = null;
|
||
}
|
||
|
||
g.Dispose();
|
||
}
|
||
|
||
protected override void OnDrawNode(DrawTreeNodeEventArgs e)
|
||
{
|
||
base.OnDrawNode(e);
|
||
|
||
if (e.Node == null) return;
|
||
|
||
if (BorderStyle == BorderStyle.Fixed3D) BorderStyle = BorderStyle.FixedSingle;
|
||
|
||
if (e.Node == null || e.Node.Bounds.Width <= 0 && e.Node.Bounds.Height <= 0 && e.Node.Bounds.X <= 0 &&
|
||
e.Node.Bounds.Y <= 0)
|
||
{
|
||
e.DrawDefault = true;
|
||
}
|
||
else
|
||
{
|
||
var drawLeft = (e.Node.Level + 1) * Indent + 3;
|
||
var checkBoxLeft = (e.Node.Level + 1) * Indent + 1;
|
||
var imageLeft = drawLeft;
|
||
var haveImage = false;
|
||
var sf = e.Graphics.MeasureString(e.Node.Text, Font);
|
||
|
||
if (CheckBoxes) drawLeft += 16;
|
||
|
||
if (ImageList != null && ImageList.Images.Count > 0 && e.Node.ImageIndex >= 0 &&
|
||
e.Node.ImageIndex < ImageList.Images.Count)
|
||
{
|
||
haveImage = true;
|
||
drawLeft += ImageList.ImageSize.Width + 6;
|
||
}
|
||
|
||
var checkboxColor = ForeColor;
|
||
if (e.Node == SelectedNode)
|
||
{
|
||
e.Graphics.FillRectangle((e.State & TreeNodeStates.Hot) != 0 ? HoverColor : SelectedColor,
|
||
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
|
||
|
||
e.Graphics.DrawString(e.Node.Text, Font, SelectedForeColor, drawLeft,
|
||
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
|
||
|
||
checkboxColor = SelectedForeColor;
|
||
}
|
||
else if (e.Node == CurrentNode && (e.State & TreeNodeStates.Hot) != 0)
|
||
{
|
||
e.Graphics.FillRectangle(HoverColor,
|
||
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
|
||
e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft,
|
||
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
|
||
}
|
||
else
|
||
{
|
||
e.Graphics.FillRectangle(FillColor,
|
||
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
|
||
e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft,
|
||
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
|
||
}
|
||
|
||
if (haveImage)
|
||
{
|
||
if (e.Node == SelectedNode && e.Node.SelectedImageIndex >= 0 &&
|
||
e.Node.SelectedImageIndex < ImageList.Images.Count)
|
||
e.Graphics.DrawImage(ImageList.Images[e.Node.SelectedImageIndex], imageLeft,
|
||
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
|
||
else
|
||
e.Graphics.DrawImage(ImageList.Images[e.Node.ImageIndex], imageLeft,
|
||
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
|
||
}
|
||
|
||
if (CheckBoxes)
|
||
{
|
||
if (!e.Node.Checked)
|
||
using (var pn = new Pen(checkboxColor, 1))
|
||
{
|
||
e.Graphics.DrawRectangle(pn,
|
||
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
|
||
}
|
||
else
|
||
using (var pn = new Pen(checkboxColor, 2))
|
||
{
|
||
var pt1 = new Point(checkBoxLeft + 2 + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1 + 5);
|
||
var pt2 = new Point(pt1.X + 3, pt1.Y + 3);
|
||
var pt3 = new Point(pt2.X + 5, pt2.Y - 5);
|
||
|
||
PointF[] CheckMarkLine = { pt1, pt2, pt3 };
|
||
|
||
e.Graphics.SetHighQuality();
|
||
e.Graphics.DrawLines(pn, CheckMarkLine);
|
||
e.Graphics.SetDefaultQuality();
|
||
e.Graphics.DrawRectangle(checkboxColor,
|
||
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
|
||
}
|
||
}
|
||
|
||
var lineY = e.Bounds.Y + e.Node.Bounds.Height / 2 - 1;
|
||
var lineX = 3 + e.Node.Level * Indent + 9;
|
||
|
||
if (ShowLinesEx)
|
||
try
|
||
{
|
||
//绘制虚线
|
||
var pn = new Pen(LineColor);
|
||
pn.DashStyle = DashStyle.Dot;
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX + 10, lineY);
|
||
|
||
if (e.Node.Level >= 1)
|
||
{
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Bounds.Top);
|
||
if (e.Node.NextNode != null)
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
|
||
|
||
var pNode = e.Node.Parent;
|
||
while (pNode != null)
|
||
{
|
||
lineX -= Indent;
|
||
|
||
if (pNode.NextNode != null)
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top);
|
||
|
||
if (pNode.NextNode != null)
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
|
||
|
||
pNode = pNode.Parent;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (e.Node.PrevNode != null)
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top);
|
||
|
||
if (e.Node.NextNode != null)
|
||
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
|
||
}
|
||
|
||
pn.Dispose();
|
||
}
|
||
catch (Exception exception)
|
||
{
|
||
Console.WriteLine(exception);
|
||
}
|
||
|
||
lineX = 3 + e.Node.Level * Indent + 9;
|
||
//绘制左侧+号
|
||
if (ShowPlusMinus && e.Node.Nodes.Count > 0)
|
||
{
|
||
e.Graphics.FillRectangle(Color.White, new Rectangle(lineX - 4, lineY - 4, 8, 8));
|
||
e.Graphics.DrawRectangle(UIFontColor.Primary, new Rectangle(lineX - 4, lineY - 4, 8, 8));
|
||
e.Graphics.DrawLine(UIFontColor.Primary, lineX - 2, lineY, lineX + 2, lineY);
|
||
if (!e.Node.IsExpanded)
|
||
e.Graphics.DrawLine(UIFontColor.Primary, lineX, lineY - 2, lineX, lineY + 2);
|
||
}
|
||
}
|
||
}
|
||
|
||
private bool TreeNodeSelected(DrawTreeNodeEventArgs e)
|
||
{
|
||
return e.State == TreeNodeStates.Selected || e.State == TreeNodeStates.Focused ||
|
||
e.State == (TreeNodeStates.Focused | TreeNodeStates.Selected);
|
||
}
|
||
}
|
||
}
|
||
} |