(七十九)c#Winform自定义控件-导航菜单

前提

入行已经7,8年了,一直想做一套漂亮点的自定义控件,于是就有了本系列文章。

GitHub:https://github.com/kwwwvagaa/NetWinformControl

码云:https://gitee.com/kwwwvagaa/net_winform_custom_control.git

如果觉得写的还行,请点个 star 支持一下吧

欢迎前来交流探讨: 企鹅群568015492 (七十九)c#Winform自定义控件-导航菜单

来都来了,点个【推荐】再走吧,谢谢

NuGet

Install-Package HZH_Controls

目录

https://www.cnblogs.com/bfyx/p/11364884.html

用处及效果

准备工作

主要用的就是停靠窗体了,(十九)c#Winform自定义控件-停靠窗体,不了解的可以先去看一下

思路:

通过实体对象设置的对齐方式来实现左右对齐,

当鼠标进入一项的时候,判断是否弹出下拉列表,或关闭其他列表

开始

添加一个类用来设置节点信息

 

 1 public class NavigationMenuItem 2  { 3 /// <summary> 4 /// The icon 5 /// </summary> 6 private Image icon; 7 /// <summary> 8 /// Gets or sets the icon. 9 /// </summary> 10 /// <value>The icon.</value> 11 [Description("图标,仅顶级节点有效")] 12 public Image Icon 13  { 14 get { return icon; } 15 set { icon = value; } 16  } 17  18 /// <summary> 19 /// The text 20 /// </summary> 21 private string text; 22 /// <summary> 23 /// Gets or sets the text. 24 /// </summary> 25 /// <value>The text.</value> 26  27 [Description("文本")] 28 public string Text 29  { 30 get { return text; } 31 set { text = value; } 32  } 33  34 /// <summary> 35 /// The show tip 36 /// </summary> 37 private bool showTip; 38 /// <summary> 39 /// Gets or sets a value indicating whether [show tip].当TipText为空时只显示一个小圆点,否则显示TipText文字 40 /// </summary> 41 /// <value><c>true</c> if [show tip]; otherwise, <c>false</c>.</value> 42 [Description("是否显示角标,仅顶级节点有效")] 43 public bool ShowTip 44  { 45 get { return showTip; } 46 set { showTip = value; } 47  } 48  49 /// <summary> 50 /// The tip text 51 /// </summary> 52 private string tipText; 53 /// <summary> 54 /// Gets or sets the tip text 55 /// </summary> 56 /// <value>The tip text.</value> 57 [Description("角标文字,仅顶级节点有效")] 58 public string TipText 59  { 60 get { return tipText; } 61 set { tipText = value; } 62  } 63 /// <summary> 64 /// The items 65 /// </summary> 66 private NavigationMenuItem[] items; 67 /// <summary> 68 /// Gets or sets the items. 69 /// </summary> 70 /// <value>The items.</value> 71 [Description("子项列表")] 72 public NavigationMenuItem[] Items 73  { 74 get { return items; } 75 set 76  { 77 items = value; 78 if (value != null) 79  { 80 foreach (var item in value) 81  { 82 item.ParentItem = this; 83  } 84  } 85  } 86  } 87  88 /// <summary> 89 /// The anchor right 90 /// </summary> 91 private bool anchorRight; 92  93 /// <summary> 94 /// Gets or sets a value indicating whether [anchor right]. 95 /// </summary> 96 /// <value><c>true</c> if [anchor right]; otherwise, <c>false</c>.</value> 97 [Description("是否靠右对齐")] 98 public bool AnchorRight 99  {100 get { return anchorRight; }101 set { anchorRight = value; }102  }103 104 /// <summary>105 /// The item width106 /// </summary>107 private int itemWidth = 100;108 109 /// <summary>110 /// Gets or sets the width of the item.111 /// </summary>112 /// <value>The width of the item.</value>113 [Description("宽度")]114 public int ItemWidth115  {116 get { return itemWidth; }117 set { itemWidth = value; }118  }119 120 /// <summary>121 /// Gets or sets the data source.122 /// </summary>123 /// <value>The data source.</value>124 [Description("数据源")]125 public object DataSource { get; set; }126 /// <summary>127 /// Gets or sets a value indicating whether this instance has split lint at top.128 /// </summary>129 /// <value><c>true</c> if this instance has split lint at top; otherwise, <c>false</c>.</value>130 [Description("是否在此项顶部显示一个分割线")]131 public bool HasSplitLintAtTop { get; set; }132 133 /// <summary>134 /// Gets the parent item.135 /// </summary>136 /// <value>The parent item.</value>137 [Description("父节点")]138 public NavigationMenuItem ParentItem { get; private set; }139 }

添加一个自定义控件UCNavigationMenu

添加一些属性

 1 /// <summary> 2 /// Occurs when [click itemed]. 3 /// </summary> 4 [Description("点击节点事件"), Category("自定义")] 5  6 public event EventHandler ClickItemed; 7 /// <summary> 8 /// The select item 9 /// </summary> 10 private NavigationMenuItem selectItem = null; 11  12 /// <summary> 13 /// Gets the select item. 14 /// </summary> 15 /// <value>The select item.</value> 16 [Description("选中的节点"), Category("自定义")] 17 public NavigationMenuItem SelectItem 18  { 19 get { return selectItem; } 20 private set { selectItem = value; } 21  } 22  23  24 /// <summary> 25 /// The items 26 /// </summary> 27  NavigationMenuItem[] items; 28  29 /// <summary> 30 /// Gets or sets the items. 31 /// </summary> 32 /// <value>The items.</value> 33 [Description("节点列表"), Category("自定义")] 34 public NavigationMenuItem[] Items 35  { 36 get { return items; } 37 set 38  { 39 items = value; 40  ReloadMenu(); 41  } 42  } 43  44 /// <summary> 45 /// The tip color 46 /// </summary> 47 private Color tipColor = Color.FromArgb(255, 87, 34); 48  49 /// <summary> 50 /// Gets or sets the color of the tip. 51 /// </summary> 52 /// <value>The color of the tip.</value> 53 [Description("角标颜色"), Category("自定义")] 54 public Color TipColor 55  { 56 get { return tipColor; } 57 set { tipColor = value; } 58  } 59  60 /// <summary> 61 /// 获取或设置控件的前景色。 62 /// </summary> 63 /// <value>The color of the fore.</value> 64 /// <PermissionSet> 65 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 66 /// </PermissionSet> 67 public override System.Drawing.Color ForeColor 68  { 69 get 70  { 71 return base.ForeColor; 72  } 73 set 74  { 75 base.ForeColor = value; 76 foreach (Control c in this.Controls) 77  { 78 c.ForeColor = value; 79  } 80  } 81  } 82 /// <summary> 83 /// 获取或设置控件显示的文字的字体。 84 /// </summary> 85 /// <value>The font.</value> 86 /// <PermissionSet> 87 /// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 88 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 89 /// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" /> 90 /// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" /> 91 /// </PermissionSet> 92 public override Font Font 93  { 94 get 95  { 96 return base.Font; 97  } 98 set 99  {100 base.Font = value;101 foreach (Control c in this.Controls)102  {103 c.Font = value;104  }105  }106  }107 108 /// <summary>109 /// The m LST anchors110 /// </summary>111 Dictionary<NavigationMenuItem, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItem, FrmAnchor>();

重载菜单

 1 private void ReloadMenu() 2  { 3 try 4  { 5 ControlHelper.FreezeControl(this, true); 6 this.Controls.Clear(); 7 if (items != null && items.Length > 0) 8  { 9 foreach (var item in items)10  {11 var menu = (NavigationMenuItem)item;12 Label lbl = new Label();13 lbl.AutoSize = false;14 lbl.TextAlign = ContentAlignment.MiddleCenter;15 lbl.Width = menu.ItemWidth;16 lbl.Text = menu.Text;17 18 lbl.Font = Font;19 lbl.ForeColor = ForeColor;20 21 lbl.Paint += lbl_Paint;22 lbl.MouseEnter += lbl_MouseEnter;23 lbl.Tag = menu;24 lbl.Click += lbl_Click;25 if (menu.AnchorRight)26  {27 lbl.Dock = DockStyle.Right;28  }29 else30  {31 lbl.Dock = DockStyle.Left;32  }33 this.Controls.Add(lbl);34 35  lbl.BringToFront();36  }37 38 39  }40  }41 finally42  {43 ControlHelper.FreezeControl(this, false);44  }45 }

显示下级菜单

 1 private void ShowMoreMenu(Label lbl) 2  { 3 var menu = (NavigationMenuItem)lbl.Tag; 4 if (CheckShow(menu)) 5  { 6 if (menu.Items != null && menu.Items.Length > 0) 7  { 8 Panel panel = new Panel(); 9 panel.BackColor = Color.White;10 panel.Paint += panel_Paint;11 panel.Padding = new System.Windows.Forms.Padding(1);12 Size size = GetItemsSize(menu.Items);13 var height = size.Height * menu.Items.Length + 2;14 height += menu.Items.Count(p => p.HasSplitLintAtTop);//分割线15 if (size.Width < lbl.Width)16 size.Width = lbl.Width;17 panel.Size = new Size(size.Width, height);18 19 foreach (var item in menu.Items)20  {21 if (item.HasSplitLintAtTop)22  {23 UCSplitLine_H line = new UCSplitLine_H();24 line.Dock = DockStyle.Top;25  panel.Controls.Add(line);26  line.BringToFront();27  }28 Label _lbl = new Label();29 _lbl.Font = Font;30 _lbl.ForeColor = this.BackColor;31 _lbl.AutoSize = false;32 _lbl.TextAlign = ContentAlignment.MiddleCenter;33 _lbl.Height = size.Height;34 _lbl.Text = item.Text;35 _lbl.Dock = DockStyle.Top;36  _lbl.BringToFront();37 _lbl.Paint += lbl_Paint;38 _lbl.MouseEnter += lbl_MouseEnter;39 _lbl.Tag = item;40 _lbl.Click += lbl_Click;41 _lbl.Size = new System.Drawing.Size(size.Width, size.Height);42  panel.Controls.Add(_lbl);43  _lbl.BringToFront();44  }45 Point point = Point.Empty;46 47 if (menu.ParentItem != null)48  {49 Point p = lbl.Parent.PointToScreen(lbl.Location);50 if (p.X + lbl.Width + panel.Width > Screen.PrimaryScreen.Bounds.Width)51  {52 point = new Point(-1 * panel.Width - 2, -1 * lbl.Height);53  }54 else55  {56 point = new Point(panel.Width + 2, -1 * lbl.Height);57  }58  }59 m_lstAnchors[menu] = new FrmAnchor(lbl, panel, point);60 m_lstAnchors[menu].FormClosing += UCNavigationMenu_FormClosing;61  m_lstAnchors[menu].Show();62 m_lstAnchors[menu].Size = new Size(size.Width, height);63  }64  }65 66 }

辅助函数

 1 /// <summary> 2 /// Checks the show. 3 /// </summary> 4 /// <param name="menu">The menu.</param> 5 /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns> 6 private bool CheckShow(NavigationMenuItem menu) 7  { 8 //检查已经打开的节点 9 if (m_lstAnchors.ContainsKey(menu))10  {11  CloseList(menu);12 return false;13  }14 if (HasInCacheChild(menu))15  {16 if (m_lstAnchors.ContainsKey(menu.ParentItem))17  {18  CloseList(menu.ParentItem);19 return true;20  }21 return false;22  }23 else24  {25 for (int i = 0; i < 1; )26  {27 try28  {29 foreach (var item in m_lstAnchors)30  {31 if (m_lstAnchors[item.Key] != null && !m_lstAnchors[item.Key].IsDisposed)32  {33  m_lstAnchors[item.Key].Close();34  }35  }36  }37 catch38  {39 continue;40  }41 i++;42  }43  m_lstAnchors.Clear();44 return true;45  }46  }47 48 /// <summary>49 /// Determines whether [has in cache child] [the specified menu].50 /// </summary>51 /// <param name="menu">The menu.</param>52 /// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>53 private bool HasInCacheChild(NavigationMenuItem menu)54  {55 foreach (var item in m_lstAnchors)56  {57 if (item.Key == menu)58  {59 return true;60  }61 else62  {63 if (item.Key.Items != null)64  {65 if (item.Key.Items.Contains(menu))66 return true;67  }68  }69  }70 return false;71  }72 73 /// <summary>74 /// Closes the list.75 /// </summary>76 /// <param name="menu">The menu.</param>77 private void CloseList(NavigationMenuItem menu)78  {79 if (menu.Items != null)80  {81 foreach (var item in menu.Items)82  {83  CloseList(item);84 if (m_lstAnchors.ContainsKey(item))85  {86 if (m_lstAnchors[item] != null && !m_lstAnchors[item].IsDisposed)87  {88  m_lstAnchors[item].Close();89 m_lstAnchors[item] = null;90  m_lstAnchors.Remove(item);91  }92  }93  }94  }95 }

一些事件

 1 /// <summary> 2 /// Handles the Click event of the lbl control. 3 /// </summary> 4 /// <param name="sender">The source of the event.</param> 5 /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param> 6 void lbl_Click(object sender, EventArgs e) 7  { 8 Label lbl = sender as Label; 9 if (lbl.Tag != null) 10  { 11 var menu = (NavigationMenuItem)lbl.Tag; 12 if (menu.Items == null || menu.Items.Length <= 0) 13  { 14 selectItem = menu; 15  16 while (m_lstAnchors.Count > 0) 17  { 18 try 19  { 20 foreach (var item in m_lstAnchors) 21  { 22  item.Value.Close(); 23  m_lstAnchors.Remove(item.Key); 24  } 25  } 26 catch { } 27  } 28  29 if (ClickItemed != null) 30  { 31 ClickItemed(this, e); 32  } 33  } 34 else 35  { 36  CloseList(menu); 37 if (m_lstAnchors.ContainsKey(menu)) 38  { 39 if (m_lstAnchors[menu] != null && !m_lstAnchors[menu].IsDisposed) 40  { 41  m_lstAnchors[menu].Close(); 42  } 43  m_lstAnchors.Remove(menu); 44  } 45  ShowMoreMenu(lbl); 46  } 47  } 48  } 49  50 /// <summary> 51 /// Handles the MouseEnter event of the lbl control. 52 /// </summary> 53 /// <param name="sender">The source of the event.</param> 54 /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param> 55 void lbl_MouseEnter(object sender, EventArgs e) 56  { 57 Label lbl = sender as Label; 58  ShowMoreMenu(lbl); 59  } 60 /// <summary> 61 /// Handles the FormClosing event of the UCNavigationMenu control. 62 /// </summary> 63 /// <param name="sender">The source of the event.</param> 64 /// <param name="e">The <see cref="FormClosingEventArgs"/> instance containing the event data.</param> 65 void UCNavigationMenu_FormClosing(object sender, FormClosingEventArgs e) 66  { 67 FrmAnchor frm = sender as FrmAnchor; 68 if (m_lstAnchors.ContainsValue(frm)) 69  { 70 foreach (var item in m_lstAnchors) 71  { 72 if (item.Value == frm) 73  { 74  m_lstAnchors.Remove(item.Key); 75 return; 76  } 77  } 78  } 79  } 80  81 /// <summary> 82 /// Handles the Paint event of the panel control. 83 /// </summary> 84 /// <param name="sender">The source of the event.</param> 85 /// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param> 86 void panel_Paint(object sender, PaintEventArgs e) 87  { 88  e.Graphics.SetGDIHigh(); 89 Rectangle rect = new Rectangle(0, 0, e.ClipRectangle.Width - 1, e.ClipRectangle.Height - 1); 90 var path = rect.CreateRoundedRectanglePath(2); 91 e.Graphics.DrawPath(new Pen(new SolidBrush(LineColors.Light)), path); 92  } 93  94  95  96 /// <summary> 97 /// Gets the size of the items. 98 /// </summary> 99 /// <param name="items">The items.</param>100 /// <returns>Size.</returns>101 private Size GetItemsSize(NavigationMenuItem[] items)102  {103 Size size = Size.Empty;104 if (items != null && items.Length > 0)105  {106 using (var g = this.CreateGraphics())107  {108 foreach (NavigationMenuItem item in items)109  {110 var s = g.MeasureString(item.Text, Font);111 if (s.Width + 25 > size.Width)112  {113 size.Width = (int)s.Width + 25;114  }115 if (s.Height + 10 > size.Height)116  {117 size.Height = (int)s.Height + 10;118  }119  }120  }121  }122 return size;123  }124 125 126 /// <summary>127 /// Handles the Paint event of the lbl control.128 /// </summary>129 /// <param name="sender">The source of the event.</param>130 /// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>131 void lbl_Paint(object sender, PaintEventArgs e)132  {133 Label lbl = sender as Label;134 if (lbl.Tag != null)135  {136 var menu = (NavigationMenuItem)lbl.Tag;137  e.Graphics.SetGDIHigh();138 if (menu.ParentItem == null)//顶级节点支持图标和角标139  {140 if (menu.ShowTip)141  {142 if (!string.IsNullOrEmpty(menu.TipText))143  {144 var rect = new Rectangle(lbl.Width - 25, lbl.Height / 2 - 10, 20, 20);145 var path = rect.CreateRoundedRectanglePath(5);146 e.Graphics.FillPath(new SolidBrush(tipColor), path);147 e.Graphics.DrawString(menu.TipText, new Font("微软雅黑", 8f), new SolidBrush(Color.White), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });148  }149 else150  {151 e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - 20, lbl.Height / 2 - 10, 10, 10));152  }153  }154 if (menu.Icon != null)155  {156 e.Graphics.DrawImage(menu.Icon, new Rectangle(1, (lbl.Height - 25) / 2, 25, 25), 0, 0, menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);157  }158  }159 if (menu.ParentItem != null && menu.Items != null && menu.Items.Length > 0)160  {161 ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(this.BackColor), new Point(lbl.Width - 11, (lbl.Height - 5) / 2), 5, GraphDirection.Rightward);162  }163  }164 }

完整代码


 1 // *********************************************************************** 2 // Assembly : HZH_Controls 3 // Created : 2019-10-08 4 // 5 // *********************************************************************** 6 // <copyright file="UCNavigationMenu.cs"> 7 // Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com 8 // </copyright> 9 // 10 // Blog: https://www.cnblogs.com/bfyx 11 // GitHub:https://github.com/kwwwvagaa/NetWinformControl 12 // gitee:https://gitee.com/kwwwvagaa/net_winform_custom_control.git 13 // 14 // If you use this code, please keep this note. 15 // *********************************************************************** 16 using System; 17 using System.Collections.Generic; 18 using System.ComponentModel; 19 using System.Drawing; 20 using System.Data; 21 using System.Linq; 22 using System.Text; 23 using System.Windows.Forms; 24 using HZH_Controls.Forms; 25  26 namespace HZH_Controls.Controls 27 { 28 /// <summary> 29 /// Class UCNavigationMenu. 30 /// Implements the <see cref="System.Windows.Forms.UserControl" /> 31 /// </summary> 32 /// <seealso cref="System.Windows.Forms.UserControl" /> 33 [DefaultEvent("ClickItemed")] 34 public partial class UCNavigationMenu : UserControl 35  { 36 /// <summary> 37 /// Occurs when [click itemed]. 38 /// </summary> 39 [Description("点击节点事件"), Category("自定义")] 40  41 public event EventHandler ClickItemed; 42 /// <summary> 43 /// The select item 44 /// </summary> 45 private NavigationMenuItem selectItem = null; 46  47 /// <summary> 48 /// Gets the select item. 49 /// </summary> 50 /// <value>The select item.</value> 51 [Description("选中的节点"), Category("自定义")] 52 public NavigationMenuItem SelectItem 53  { 54 get { return selectItem; } 55 private set { selectItem = value; } 56  } 57  58  59 /// <summary> 60 /// The items 61 /// </summary> 62  NavigationMenuItem[] items; 63  64 /// <summary> 65 /// Gets or sets the items. 66 /// </summary> 67 /// <value>The items.</value> 68 [Description("节点列表"), Category("自定义")] 69 public NavigationMenuItem[] Items 70  { 71 get { return items; } 72 set 73  { 74 items = value; 75  ReloadMenu(); 76  } 77  } 78  79 /// <summary> 80 /// The tip color 81 /// </summary> 82 private Color tipColor = Color.FromArgb(255, 87, 34); 83  84 /// <summary> 85 /// Gets or sets the color of the tip. 86 /// </summary> 87 /// <value>The color of the tip.</value> 88 [Description("角标颜色"), Category("自定义")] 89 public Color TipColor 90  { 91 get { return tipColor; } 92 set { tipColor = value; } 93  } 94  95 /// <summary> 96 /// 获取或设置控件的前景色。 97 /// </summary> 98 /// <value>The color of the fore.</value> 99 /// <PermissionSet>100 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />101 /// </PermissionSet>102 public override System.Drawing.Color ForeColor103  {104 get105  {106 return base.ForeColor;107  }108 set109  {110 base.ForeColor = value;111 foreach (Control c in this.Controls)112  {113 c.ForeColor = value;114  }115  }116  }117 /// <summary>118 /// 获取或设置控件显示的文字的字体。119 /// </summary>120 /// <value>The font.</value>121 /// <PermissionSet>122 /// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />123 /// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />124 /// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />125 /// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />126 /// </PermissionSet>127 public override Font Font128  {129 get130  {131 return base.Font;132  }133 set134  {135 base.Font = value;136 foreach (Control c in this.Controls)137  {138 c.Font = value;139  }140  }141  }142 143 /// <summary>144 /// The m LST anchors145 /// </summary>146 Dictionary<NavigationMenuItem, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItem, FrmAnchor>();147 148 /// <summary>149 /// Initializes a new instance of the <see cref="UCNavigationMenu"/> class.150 /// </summary>151 public UCNavigationMenu()152  {153  InitializeComponent();154 items = new NavigationMenuItem[0];155 if (ControlHelper.IsDesignMode())156  {157 items = new NavigationMenuItem[4];158 for (int i = 0; i < 4; i++)159  {160 items[i] = new NavigationMenuItem()161  {162 Text = "菜单" + (i + 1),163 AnchorRight = i >= 2164  };165  }166  }167  }168 169 /// <summary>170 /// Reloads the menu.171 /// </summary>172 private void ReloadMenu()173  {174 try175  {176 ControlHelper.FreezeControl(this, true);177 this.Controls.Clear();178 if (items != null && items.Length > 0)179  {180 foreach (var item in items)181  {182 var menu = (NavigationMenuItem)item;183 Label lbl = new Label();184 lbl.AutoSize = false;185 lbl.TextAlign = ContentAlignment.MiddleCenter;186 lbl.Width = menu.ItemWidth;187 lbl.Text = menu.Text;188 189 lbl.Font = Font;190 lbl.ForeColor = ForeColor;191 192 lbl.Paint += lbl_Paint;193 lbl.MouseEnter += lbl_MouseEnter;194 lbl.Tag = menu;195 lbl.Click += lbl_Click;196 if (menu.AnchorRight)197  {198 lbl.Dock = DockStyle.Right;199  }200 else201  {202 lbl.Dock = DockStyle.Left;203  }204 this.Controls.Add(lbl);205 206  lbl.BringToFront();207  }208 209 210  }211  }212 finally213  {214 ControlHelper.FreezeControl(this, false);215  }216  }217 218 219 220 /// <summary>221 /// Handles the Click event of the lbl control.222 /// </summary>223 /// <param name="sender">The source of the event.</param>224 /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>225 void lbl_Click(object sender, EventArgs e)226  {227 Label lbl = sender as Label;228 if (lbl.Tag != null)229  {230 var menu = (NavigationMenuItem)lbl.Tag;231 if (menu.Items == null || menu.Items.Length <= 0)232  {233 selectItem = menu;234 235 while (m_lstAnchors.Count > 0)236  {237 try238  {239 foreach (var item in m_lstAnchors)240  {241  item.Value.Close();242  m_lstAnchors.Remove(item.Key);243  }244  }245 catch { }246  }247 248 if (ClickItemed != null)249  {250 ClickItemed(this, e);251  }252  }253 else254  {255  CloseList(menu);256 if (m_lstAnchors.ContainsKey(menu))257  {258 if (m_lstAnchors[menu] != null && !m_lstAnchors[menu].IsDisposed)259  {260  m_lstAnchors[menu].Close();261  }262  m_lstAnchors.Remove(menu);263  }264  ShowMoreMenu(lbl);265  }266  }267  }268 269 /// <summary>270 /// Handles the MouseEnter event of the lbl control.271 /// </summary>272 /// <param name="sender">The source of the event.</param>273 /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>274 void lbl_MouseEnter(object sender, EventArgs e)275  {276 Label lbl = sender as Label;277  ShowMoreMenu(lbl);278  }279 280 /// <summary>281 /// Checks the show.282 /// </summary>283 /// <param name="menu">The menu.</param>284 /// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>285 private bool CheckShow(NavigationMenuItem menu)286  {287 //检查已经打开的节点288 if (m_lstAnchors.ContainsKey(menu))289  {290  CloseList(menu);291 return false;292  }293 if (HasInCacheChild(menu))294  {295 if (m_lstAnchors.ContainsKey(menu.ParentItem))296  {297  CloseList(menu.ParentItem);298 return true;299  }300 return false;301  }302 else303  {304 for (int i = 0; i < 1; )305  {306 try307  {308 foreach (var item in m_lstAnchors)309  {310 if (m_lstAnchors[item.Key] != null && !m_lstAnchors[item.Key].IsDisposed)311  {312  m_lstAnchors[item.Key].Close();313  }314  }315  }316 catch317  {318 continue;319  }320 i++;321  }322  m_lstAnchors.Clear();323 return true;324  }325  }326 327 /// <summary>328 /// Determines whether [has in cache child] [the specified menu].329 /// </summary>330 /// <param name="menu">The menu.</param>331 /// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>332 private bool HasInCacheChild(NavigationMenuItem menu)333  {334 foreach (var item in m_lstAnchors)335  {336 if (item.Key == menu)337  {338 return true;339  }340 else341  {342 if (item.Key.Items != null)343  {344 if (item.Key.Items.Contains(menu))345 return true;346  }347  }348  }349 return false;350  }351 352 /// <summary>353 /// Closes the list.354 /// </summary>355 /// <param name="menu">The menu.</param>356 private void CloseList(NavigationMenuItem menu)357  {358 if (menu.Items != null)359  {360 foreach (var item in menu.Items)361  {362  CloseList(item);363 if (m_lstAnchors.ContainsKey(item))364  {365 if (m_lstAnchors[item] != null && !m_lstAnchors[item].IsDisposed)366  {367  m_lstAnchors[item].Close();368 m_lstAnchors[item] = null;369  m_lstAnchors.Remove(item);370  }371  }372  }373  }374  }375 376 /// <summary>377 /// Shows the more menu.378 /// </summary>379 /// <param name="lbl">The label.</param>380 private void ShowMoreMenu(Label lbl)381  {382 var menu = (NavigationMenuItem)lbl.Tag;383 if (CheckShow(menu))384  {385 if (menu.Items != null && menu.Items.Length > 0)386  {387 Panel panel = new Panel();388 panel.BackColor = Color.White;389 panel.Paint += panel_Paint;390 panel.Padding = new System.Windows.Forms.Padding(1);391 Size size = GetItemsSize(menu.Items);392 var height = size.Height * menu.Items.Length + 2;393 height += menu.Items.Count(p => p.HasSplitLintAtTop);//分割线394 if (size.Width < lbl.Width)395 size.Width = lbl.Width;396 panel.Size = new Size(size.Width, height);397 398 foreach (var item in menu.Items)399  {400 if (item.HasSplitLintAtTop)401  {402 UCSplitLine_H line = new UCSplitLine_H();403 line.Dock = DockStyle.Top;404  panel.Controls.Add(line);405  line.BringToFront();406  }407 Label _lbl = new Label();408 _lbl.Font = Font;409 _lbl.ForeColor = this.BackColor;410 _lbl.AutoSize = false;411 _lbl.TextAlign = ContentAlignment.MiddleCenter;412 _lbl.Height = size.Height;413 _lbl.Text = item.Text;414 _lbl.Dock = DockStyle.Top;415  _lbl.BringToFront();416 _lbl.Paint += lbl_Paint;417 _lbl.MouseEnter += lbl_MouseEnter;418 _lbl.Tag = item;419 _lbl.Click += lbl_Click;420 _lbl.Size = new System.Drawing.Size(size.Width, size.Height);421  panel.Controls.Add(_lbl);422  _lbl.BringToFront();423  }424 Point point = Point.Empty;425 426 if (menu.ParentItem != null)427  {428 Point p = lbl.Parent.PointToScreen(lbl.Location);429 if (p.X + lbl.Width + panel.Width > Screen.PrimaryScreen.Bounds.Width)430  {431 point = new Point(-1 * panel.Width - 2, -1 * lbl.Height);432  }433 else434  {435 point = new Point(panel.Width + 2, -1 * lbl.Height);436  }437  }438 m_lstAnchors[menu] = new FrmAnchor(lbl, panel, point);439 m_lstAnchors[menu].FormClosing += UCNavigationMenu_FormClosing;440  m_lstAnchors[menu].Show();441 m_lstAnchors[menu].Size = new Size(size.Width, height);442  }443  }444 445  }446 447 /// <summary>448 /// Handles the FormClosing event of the UCNavigationMenu control.449 /// </summary>450 /// <param name="sender">The source of the event.</param>451 /// <param name="e">The <see cref="FormClosingEventArgs"/> instance containing the event data.</param>452 void UCNavigationMenu_FormClosing(object sender, FormClosingEventArgs e)453  {454 FrmAnchor frm = sender as FrmAnchor;455 if (m_lstAnchors.ContainsValue(frm))456  {457 foreach (var item in m_lstAnchors)458  {459 if (item.Value == frm)460  {461  m_lstAnchors.Remove(item.Key);462 return;463  }464  }465  }466  }467 468 /// <summary>469 /// Handles the Paint event of the panel control.470 /// </summary>471 /// <param name="sender">The source of the event.</param>472 /// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>473 void panel_Paint(object sender, PaintEventArgs e)474  {475  e.Graphics.SetGDIHigh();476 Rectangle rect = new Rectangle(0, 0, e.ClipRectangle.Width - 1, e.ClipRectangle.Height - 1);477 var path = rect.CreateRoundedRectanglePath(2);478 e.Graphics.DrawPath(new Pen(new SolidBrush(LineColors.Light)), path);479  }480 481 482 483 /// <summary>484 /// Gets the size of the items.485 /// </summary>486 /// <param name="items">The items.</param>487 /// <returns>Size.</returns>488 private Size GetItemsSize(NavigationMenuItem[] items)489  {490 Size size = Size.Empty;491 if (items != null && items.Length > 0)492  {493 using (var g = this.CreateGraphics())494  {495 foreach (NavigationMenuItem item in items)496  {497 var s = g.MeasureString(item.Text, Font);498 if (s.Width + 25 > size.Width)499  {500 size.Width = (int)s.Width + 25;501  }502 if (s.Height + 10 > size.Height)503  {504 size.Height = (int)s.Height + 10;505  }506  }507  }508  }509 return size;510  }511 512 513 /// <summary>514 /// Handles the Paint event of the lbl control.515 /// </summary>516 /// <param name="sender">The source of the event.</param>517 /// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>518 void lbl_Paint(object sender, PaintEventArgs e)519  {520 Label lbl = sender as Label;521 if (lbl.Tag != null)522  {523 var menu = (NavigationMenuItem)lbl.Tag;524  e.Graphics.SetGDIHigh();525 if (menu.ParentItem == null)//顶级节点支持图标和角标526  {527 if (menu.ShowTip)528  {529 if (!string.IsNullOrEmpty(menu.TipText))530  {531 var rect = new Rectangle(lbl.Width - 25, lbl.Height / 2 - 10, 20, 20);532 var path = rect.CreateRoundedRectanglePath(5);533 e.Graphics.FillPath(new SolidBrush(tipColor), path);534 e.Graphics.DrawString(menu.TipText, new Font("微软雅黑", 8f), new SolidBrush(Color.White), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });535  }536 else537  {538 e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - 20, lbl.Height / 2 - 10, 10, 10));539  }540  }541 if (menu.Icon != null)542  {543 e.Graphics.DrawImage(menu.Icon, new Rectangle(1, (lbl.Height - 25) / 2, 25, 25), 0, 0, menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);544  }545  }546 if (menu.ParentItem != null && menu.Items != null && menu.Items.Length > 0)547  {548 ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(this.BackColor), new Point(lbl.Width - 11, (lbl.Height - 5) / 2), 5, GraphDirection.Rightward);549  }550  }551  }552  }553 }

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