264 lines
8.4 KiB
C#
264 lines
8.4 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: UIComboTreeView.cs
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* 文件说明: 树形列表框
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* 当前版本: V3.1
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* 创建日期: 2020-11-11
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*
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* 2021-07-29: V3.0.5 修复SelectedNode=null的问题
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* 2021-11-11: V3.0.0 增加文件说明
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* 2022-05-15: V3.0.8 显示CheckBoxes时自己选中节点文字可切换状态
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* 2022-06-16: V3.2.0 增加下拉框宽度、高度
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* 2022-07-12: V3.2.1 修复CanSelectRootNode时可以展开子节点
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* 2022-11-30: V3.3.0 增加Clear方法
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* 2023-02-04: V3.3.1 下拉框增加显示全选选择框
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* 2023-04-02: V3.3.4 显示清除按钮
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* 2023-06-12: V3.3.8 修复使用清空按钮后，再次打开下拉框，上次的选择内容还是存在
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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.Text;
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using System.Windows.Forms;
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namespace Sunny.UI
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{
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[DefaultEvent("NodeSelected")]
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[DefaultProperty("Nodes")]
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[ToolboxItem(true)]
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public class UIComboTreeView : UIDropControl, IToolTip
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{
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public UIComboTreeView()
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{
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InitializeComponent();
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fullControlSelect = true;
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CreateInstance();
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DropDownWidth = 250;
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DropDownHeight = 220;
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}
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private void InitializeComponent()
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{
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this.SuspendLayout();
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//
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// UIComboTreeView
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//
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this.DropDownStyle = UIDropDownStyle.DropDownList;
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this.Name = "UIComboTreeView";
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this.Padding = new Padding(0, 0, 30, 0);
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this.ButtonClick += this.UIComboTreeView_ButtonClick;
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this.ResumeLayout(false);
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this.PerformLayout();
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}
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/// <summary>
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/// 必需的设计器变量。
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/// </summary>
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private System.ComponentModel.IContainer components = null;
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/// <summary>
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/// 清理所有正在使用的资源。
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/// </summary>
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/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
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protected override void Dispose(bool disposing)
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{
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if (disposing && (components != null))
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{
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components.Dispose();
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}
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item?.Dispose();
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base.Dispose(disposing);
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}
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[DefaultValue(false)]
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[Description("显示清除按钮"), Category("SunnyUI")]
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public bool ShowClearButton
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{
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get => showClearButton;
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set => showClearButton = value;
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}
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[DefaultValue(true)]
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[Description("下拉框显示全选选择框"), Category("SunnyUI")]
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public bool ShowSelectedAllCheckBox { get; set; } = true;
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[DefaultValue(250)]
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[Description("下拉框宽度"), Category("SunnyUI")]
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public int DropDownWidth { get; set; }
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[DefaultValue(220)]
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[Description("下拉框高度"), Category("SunnyUI")]
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public int DropDownHeight { get; set; }
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/// <summary>
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/// 需要额外设置ToolTip的控件
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/// </summary>
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/// <returns>控件</returns>
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public Control ExToolTipControl()
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{
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return edit;
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}
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public override void Clear()
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{
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base.Clear();
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TreeView.Nodes.Clear();
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}
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[Browsable(false)]
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public UITreeView TreeView => item.TreeView;
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Localizable(true)]
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[MergableProperty(false)]
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[Description("显示节点集合"), Category("SunnyUI")]
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public TreeNodeCollection Nodes => item.TreeView.Nodes;
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[DefaultValue(false), Description("是否显示单选框,该属性与CanSelectRootNode互斥"), Category("SunnyUI")]
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public bool CheckBoxes
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{
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get => item.CheckBoxes;
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set
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{
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item.CheckBoxes = value;
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if (value)
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{
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CanSelectRootNode = false;
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}
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}
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}
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[DefaultValue(false), Description("单选时是否可选择父节点,该属性与CheckBoxes互斥"), Category("SunnyUI")]
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public bool CanSelectRootNode
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{
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get => item.CanSelectRootNode;
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set
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{
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item.CanSelectRootNode = value;
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if (value)
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{
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CheckBoxes = false;
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}
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}
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}
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[DefaultValue(false), Description("是否显示连线"), Category("SunnyUI")]
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public bool ShowLines
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{
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get => item.TreeView.ShowLines;
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set => item.TreeView.ShowLines = value;
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}
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private readonly UIComboTreeViewItem item = new UIComboTreeViewItem();
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/// <summary>
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/// 创建对象
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/// </summary>
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protected override void CreateInstance()
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{
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ItemForm = new UIDropDown(item);
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}
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[Browsable(false), DefaultValue(null)]
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public TreeNode SelectedNode
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{
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get => item.TreeView.SelectedNode;
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set
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{
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item.TreeView.SelectedNode = value;
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Text = value?.Text;
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}
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}
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public delegate void OnNodeSelected(object sender, TreeNode node);
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public delegate void OnNodesSelected(object sender, TreeNodeCollection nodes);
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public event OnNodeSelected NodeSelected;
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public event OnNodesSelected NodesSelected;
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/// <summary>
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/// 值改变事件
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/// </summary>
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/// <param name="sender">控件</param>
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/// <param name="value">值</param>
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protected override void ItemForm_ValueChanged(object sender, object value)
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{
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if (!CheckBoxes)
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{
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TreeNode node = (TreeNode)value;
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Text = node.Text;
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NodeSelected?.Invoke(this, node);
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}
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else
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{
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StringBuilder sb = new StringBuilder();
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foreach (TreeNode node in Nodes)
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{
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if (node.Checked) sb.Append(node.Text + "; ");
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AddChildNodeText(node, sb);
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}
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Text = sb.ToString();
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NodesSelected?.Invoke(this, Nodes);
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}
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Invalidate();
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}
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private void AddChildNodeText(TreeNode node, StringBuilder sb)
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{
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if (node.Nodes.Count > 0)
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{
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foreach (TreeNode child in node.Nodes)
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{
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if (child.Checked)
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sb.Append(child.Text + "; ");
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if (child.Nodes.Count > 0)
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AddChildNodeText(child, sb);
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}
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}
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}
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private void UIComboTreeView_ButtonClick(object sender, EventArgs e)
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{
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if (NeedDrawClearButton)
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{
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NeedDrawClearButton = false;
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Text = "";
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TreeView.SelectedNode = null;
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TreeView.UnCheckedAll();
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Invalidate();
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return;
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}
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ItemForm.Size = ItemSize;
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//item.TreeView.ExpandAll();
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item.CanSelectRootNode = CanSelectRootNode;
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item.Translate();
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item.SetDPIScale();
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//ItemForm.Show(this);
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int width = DropDownWidth < Width ? Width : DropDownWidth;
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width = Math.Max(250, width);
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item.ShowSelectedAllCheckBox = ShowSelectedAllCheckBox;
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ItemForm.Show(this, new Size(width, DropDownHeight));
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}
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[DefaultValue(typeof(Size), "250, 220"), Description("下拉弹框界面大小"), Category("SunnyUI")]
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public Size ItemSize { get; set; } = new Size(250, 220);
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}
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}
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