using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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using DPumpHydr.WinFrmUI.WenSkin.Properties;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls
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{
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public partial class TreeViewEx : TreeView
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{
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#region 私有属性
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private const int WS_VSCROLL = 2097152;
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private const int GWL_STYLE = -16;
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private static readonly Font font = new Font("Arial Unicode MS", 12f);
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private int _nodeHeight = 50;
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private SizeF treeFontSize = SizeF.Empty;
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private bool blnHasVBar = false;
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private Color nodeForeColor = Color.White;
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#endregion
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#region 公有属性
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public Dictionary<string, string> LstTips { get; set; } = new Dictionary<string, string>();
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[Category("自定义属性"), Description("角标文字字体")]
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public Font TipFont { get; set; } = font;
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[Category("自定义属性"), Description("是否显示角标")]
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public Image TipImage { get; set; } = Resources.tips;
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[Category("自定义属性"), Description("是否显示角标")]
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public bool IsShowTip { get; set; } = false;
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[Category("自定义属性"), Description("使用自定义模式")]
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public bool IsShowByCustomModel { get; set; } = true;
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[Category("自定义属性"), Description("节点高度（IsShowByCustomModel=true时生效）")]
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public int NodeHeight
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{
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get
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{
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return this._nodeHeight;
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}
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set
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{
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this._nodeHeight = value;
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base.ItemHeight = value;
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}
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}
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[Category("自定义属性"), Description("下翻图标（IsShowByCustomModel=true时生效）")]
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public Image NodeDownPic { get; set; } = Resources.list_add;
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[Category("自定义属性"), Description("上翻图标（IsShowByCustomModel=true时生效）")]
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public Image NodeUpPic { get; set; } = Resources.list_subtract;
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[Category("自定义属性"), Description("节点背景颜色（IsShowByCustomModel=true时生效）")]
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public Color NodeBackgroundColor { get; set; } = Color.White;
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[Category("自定义属性"), Description("节点字体颜色（IsShowByCustomModel=true时生效）"),DefaultValue(typeof(Color),"White")]
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public Color NodeForeColor { get => nodeForeColor; set { base.ForeColor = value; nodeForeColor = value; } }
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[Category("自定义属性"), Description("节点是否显示分割线（IsShowByCustomModel=true时生效）")]
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public bool NodeIsShowSplitLine { get; set; } = false;
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[Category("自定义属性"), Description("节点分割线颜色（IsShowByCustomModel=true时生效）")]
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public Color NodeSplitLineColor { get; set; } = Color.FromArgb(232, 232, 232);
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[Category("自定义属性"), Description("选中节点背景颜色（IsShowByCustomModel=true时生效）")]
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public Color NodeSelectedColor { get; set; } = Color.FromArgb(255, 77, 59);
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[Category("自定义属性"), Description("选中节点字体颜色（IsShowByCustomModel=true时生效）")]
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public Color NodeSelectedForeColor { get; set; } = Color.White;
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[Category("自定义属性"), Description("父节点是否可选中")]
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public bool ParentNodeCanSelect { get; set; } = true;
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#endregion
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public TreeViewEx()
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{
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base.HideSelection = false;
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base.DrawMode = TreeViewDrawMode.OwnerDrawAll;
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base.DrawNode += new DrawTreeNodeEventHandler(this.treeview_DrawNode);
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base.NodeMouseClick += new TreeNodeMouseClickEventHandler(this.TreeViewEx_NodeMouseClick);
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base.SizeChanged += new EventHandler(this.TreeViewEx_SizeChanged);
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base.AfterSelect += new TreeViewEventHandler(this.TreeViewEx_AfterSelect);
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base.FullRowSelect = true;
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base.ShowLines = false;
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base.ShowPlusMinus = false;
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base.ShowRootLines = false;
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this.BackColor = Color.FromArgb(37, 37, 38);
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this.BorderStyle = System.Windows.Forms.BorderStyle.None;
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DoubleBuffered = true;
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ForeColor = Color.White;
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}
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protected override void WndProc(ref Message m)
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{
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if (m.Msg == 0x0014) // 禁掉清除背景消息WM_ERASEBKGND
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return;
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base.WndProc(ref m);
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}
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#region 重画
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private void TreeViewEx_AfterSelect(object sender, TreeViewEventArgs e)
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{
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try
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{
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if (e.Node != null)
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{
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if (!this.ParentNodeCanSelect)
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{
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if (e.Node.Nodes.Count > 0)
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{
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e.Node.Expand();
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base.SelectedNode = e.Node.Nodes[0];
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}
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}
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}
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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private void TreeViewEx_SizeChanged(object sender, EventArgs e)
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{
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this.Refresh();
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}
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private void TreeViewEx_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
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{
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try
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{
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if (e.Node != null)
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{
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if (e.Node.Nodes.Count > 0)
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{
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if (e.Node.IsExpanded)
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{
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e.Node.Collapse();
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}
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else
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{
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e.Node.Expand();
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}
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}
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if (base.SelectedNode != null)
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{
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if (base.SelectedNode == e.Node && e.Node.IsExpanded)
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{
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if (!this.ParentNodeCanSelect)
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{
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if (e.Node.Nodes.Count > 0)
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{
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base.SelectedNode = e.Node.Nodes[0];
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}
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}
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}
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}
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}
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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private void treeview_DrawNode(object sender, DrawTreeNodeEventArgs e)
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{
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try
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{
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if (e.Node == null || !this.IsShowByCustomModel || (e.Node.Bounds.Width <= 0 && e.Node.Bounds.Height <= 0 && e.Node.Bounds.X <= 0 && e.Node.Bounds.Y <= 0))
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{
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e.DrawDefault = true;
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}
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else
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{
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e.Graphics.SetGDIHigh();
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if (base.Nodes.IndexOf(e.Node) == 0)
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{
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this.blnHasVBar = this.IsVerticalScrollBarVisible();
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}
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Font font = e.Node.NodeFont;
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if (font == null)
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{
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font = ((TreeView)sender).Font;
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}
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if (this.treeFontSize == SizeF.Empty)
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{
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this.treeFontSize = this.GetFontSize(font, e.Graphics);
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}
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bool flag = false;
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int intLeft = 0;
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if (CheckBoxes)
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{
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intLeft = 20;
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}
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int num = 0;
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if (base.ImageList != null && base.ImageList.Images.Count > 0 && e.Node.ImageIndex >= 0 && e.Node.ImageIndex < base.ImageList.Images.Count)
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{
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flag = true;
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num = (e.Bounds.Height - base.ImageList.ImageSize.Height) / 2;
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intLeft += base.ImageList.ImageSize.Width;
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}
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intLeft += e.Node.Level * Indent;
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if ((e.State == TreeNodeStates.Selected || e.State == TreeNodeStates.Focused || e.State == (TreeNodeStates.Focused | TreeNodeStates.Selected)) && (this.ParentNodeCanSelect || e.Node.Nodes.Count <= 0))
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{
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e.Graphics.FillRectangle(new SolidBrush(this.NodeSelectedColor), new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(base.Width, e.Node.Bounds.Height)));
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e.Graphics.DrawString(e.Node.Text, font, new SolidBrush(this.NodeSelectedForeColor), (float)e.Bounds.X + intLeft, (float)e.Bounds.Y + ((float)this._nodeHeight - this.treeFontSize.Height) / 2f);
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}
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else
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{
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//非选中状态画背景和文字
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e.Graphics.FillRectangle(new SolidBrush(e.Node.BackColor), new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(base.Width, e.Node.Bounds.Height)));
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e.Graphics.DrawString(e.Node.Text, font, new SolidBrush(NodeForeColor), (float)e.Bounds.X + intLeft, (float)e.Bounds.Y + ((float)this._nodeHeight - this.treeFontSize.Height) / 2f);
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}
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if (CheckBoxes)
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{
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Rectangle rectCheck = new Rectangle(e.Bounds.X + 3 + e.Node.Level * Indent, e.Bounds.Y + (e.Bounds.Height - 16) / 2, 16, 16);
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GraphicsPath pathCheck = rectCheck.CreateRoundedRectanglePath(3);
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e.Graphics.FillPath(new SolidBrush(Color.FromArgb(247, 247, 247)), pathCheck);
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if (e.Node.Checked)
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{
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e.Graphics.DrawLines(new Pen(new SolidBrush(NodeSelectedColor), 2), new Point[]
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{
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new Point(rectCheck.Left+2,rectCheck.Top+8),
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new Point(rectCheck.Left+6,rectCheck.Top+12),
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new Point(rectCheck.Right-4,rectCheck.Top+4)
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});
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}
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e.Graphics.DrawPath(new Pen(new SolidBrush(Color.FromArgb(200, 200, 200))), pathCheck);
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}
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if (flag)
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{
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int num2 = e.Bounds.X - num - base.ImageList.ImageSize.Width;
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if (num2 < 0)
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{
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num2 = 3;
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}
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e.Graphics.DrawImage(base.ImageList.Images[e.Node.ImageIndex], new Rectangle(new Point(num2 + intLeft - base.ImageList.ImageSize.Width, e.Bounds.Y + num), base.ImageList.ImageSize));
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}
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if (this.NodeIsShowSplitLine)
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{
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e.Graphics.DrawLine(new Pen(this.NodeSplitLineColor, 1f), new Point(0, e.Bounds.Y + this._nodeHeight - 1), new Point(base.Width, e.Bounds.Y + this._nodeHeight - 1));
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}
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bool flag2 = false;
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if (e.Node.Nodes.Count > 0)
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{
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if (e.Node.IsExpanded && this.NodeUpPic != null)
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{
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e.Graphics.DrawImage(this.NodeUpPic, new Rectangle(base.Width - (this.blnHasVBar ? 50 : 30), e.Bounds.Y + (this._nodeHeight - 20) / 2, 20, 20));
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}
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else if (this.NodeDownPic != null)
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{
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e.Graphics.DrawImage(this.NodeDownPic, new Rectangle(base.Width - (this.blnHasVBar ? 50 : 30), e.Bounds.Y + (this._nodeHeight - 20) / 2, 20, 20));
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}
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flag2 = true;
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}
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if (this.IsShowTip && this.LstTips.ContainsKey(e.Node.Name) && !string.IsNullOrWhiteSpace(this.LstTips[e.Node.Name]))
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{
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int num3 = base.Width - (this.blnHasVBar ? 50 : 30) - (flag2 ? 20 : 0);
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int num4 = e.Bounds.Y + (this._nodeHeight - 20) / 2;
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e.Graphics.DrawImage(this.TipImage, new Rectangle(num3, num4, 20, 20));
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SizeF sizeF = e.Graphics.MeasureString(this.LstTips[e.Node.Name], this.TipFont, 100, StringFormat.GenericTypographic);
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e.Graphics.DrawString(this.LstTips[e.Node.Name], this.TipFont, new SolidBrush(Color.White), (float)(num3 + 10) - sizeF.Width / 2f - 3f, (float)(num4 + 10) - sizeF.Height / 2f);
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}
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}
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}
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catch (Exception ex)
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{
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throw ex;
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}
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}
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private SizeF GetFontSize(Font font, Graphics g = null)
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{
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SizeF result;
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try
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{
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bool flag = false;
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if (g == null)
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{
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g = base.CreateGraphics();
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flag = true;
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}
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SizeF sizeF = g.MeasureString("a", font, 100, StringFormat.GenericTypographic);
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if (flag)
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{
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g.Dispose();
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}
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result = sizeF;
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}
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catch (Exception ex)
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{
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throw ex;
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}
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return result;
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}
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[DllImport("user32", CharSet = CharSet.Auto)]
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private static extern int GetWindowLong(IntPtr hwnd, int nIndex);
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private bool IsVerticalScrollBarVisible()
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{
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return base.IsHandleCreated && (TreeViewEx.GetWindowLong(base.Handle, -16) & 2097152) != 0;
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}
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#endregion
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#region 鼠标移动事件
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private TreeNode mouseNode;
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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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TreeNode node = this.GetNodeAt(e.X, e.Y);
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if (node != mouseNode)
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{
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if (mouseNode != null)
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mouseNode.BackColor = Color.Transparent;
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node.BackColor = Color.FromArgb(51, 51, 52);
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mouseNode = node;
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}
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}
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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 (mouseNode is null)
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return;
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mouseNode.BackColor = Color.Transparent;
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mouseNode = null;
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}
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#endregion
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}
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}
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