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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
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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 width 106 /// </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 ItemWidth 115 { 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 anchors 110 /// </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 else 30 { 31 lbl.Dock = DockStyle.Left; 32 } 33 this.Controls.Add(lbl); 34 35 lbl.BringToFront(); 36 } 37 38 39 } 40 } 41 finally 42 { 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 else 55 { 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 else 24 { 25 for (int i = 0; i < 1; ) 26 { 27 try 28 { 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 catch 38 { 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 else 62 { 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 else 150 { 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 ForeColor 103 { 104 get 105 { 106 return base.ForeColor; 107 } 108 set 109 { 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 Font 128 { 129 get 130 { 131 return base.Font; 132 } 133 set 134 { 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 anchors 145 /// </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 >= 2 164 }; 165 } 166 } 167 } 168 169 /// <summary> 170 /// Reloads the menu. 171 /// </summary> 172 private void ReloadMenu() 173 { 174 try 175 { 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 else 201 { 202 lbl.Dock = DockStyle.Left; 203 } 204 this.Controls.Add(lbl); 205 206 lbl.BringToFront(); 207 } 208 209 210 } 211 } 212 finally 213 { 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 try 238 { 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 else 254 { 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 else 303 { 304 for (int i = 0; i < 1; ) 305 { 306 try 307 { 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 catch 317 { 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 else 341 { 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 else 434 { 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 else 537 { 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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