官網
http://www.hzhcontrols.com
前提
入行已經7,8年了，一直想做一套漂亮點的自定義控制元件，于是就有了本系列文章，
GitHub：https://github.com/kwwwvagaa/NetWinformControl
碼云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
如果覺得寫的還行，請點個 star 支持一下吧
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來都來了，點個【推薦】再走吧，謝謝
NuGet
Install-Package HZH_Controls
目錄
https://www.cnblogs.com/bfyx/p/11364884.html
用處及效果
準備作業
主要用的就是停靠表單了，（十九）c#Winform自定義控制元件-停靠表單，不了解的可以先去看一下
思路：
通過物體物件設定的對齊方式來實作左右對齊，
當滑鼠進入一項的時候，判斷是否彈出下拉串列，或關閉其他串列
開始
添加一個類用來設定節點資訊
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("圖示，僅頂級節點有效")] 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].當TipText為空時只顯示一個小圓點，否則顯示TipText文字 40 /// </summary> 41 /// <value><c>true</c> if [show tip]; otherwise, <c>false</c>.</value> 42 [Description("是否顯示角標，僅頂級節點有效")] 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("角標文字，僅頂級節點有效")] 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("子項串列")] 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("是否靠右對齊")] 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("寬度")]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("資料源")]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("是否在此項頂部顯示一個分割線")]131 public bool HasSplitLintAtTop { get; set; }132 133 /// <summary>134 /// Gets the parent item.135 /// </summary>136 /// <value>The parent item.</value>137 [Description("父節點")]138 public NavigationMenuItem ParentItem { get; private set; }139 }
添加一個自定義控制元件UCNavigationMenu
添加一些屬性
1 /// <summary> 2 /// Occurs when [click itemed]. 3 /// </summary> 4 [Description("點擊節點事件"), Category("自定義")] 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("選中的節點"), Category("自定義")] 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("節點串列"), Category("自定義")] 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("角標顏色"), Category("自定義")] 54 public Color TipColor 55 { 56 get { return tipColor; } 57 set { tipColor = value; } 58 } 59 60 /// <summary> 61 /// 獲取或設定控制元件的前景色， 62 /// </summary> 63 /// <value>The color of the fore.</value> 64 /// <PermissionSet> 65 /// <IPermission 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 /// 獲取或設定控制元件顯示的文字的字體， 84 /// </summary> 85 /// <value>The font.</value> 86 /// <PermissionSet> 87 /// <IPermission version="1" Unrestricted="true" /> 88 /// <IPermission version="1" Unrestricted="true" /> 89 /// <IPermission version="1" Flags="UnmanagedCode, ControlEvidence" /> 90 /// <IPermission 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>();
多載選單
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 }
顯示下級選單
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);//分割線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 }
輔助函式
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 //檢查已經打開的節點 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 =https://www.cnblogs.com/bfyx/p/= 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)//頂級節點支持圖示和角標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("微軟雅黑", 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 }
完整代碼
1 // *********************************************************************** 2 // Assembly : HZH_Controls 3 // Created : 2019-10-08 4 // 5 // *********************************************************************** 6 // <copyright file="UCNavigationMenu.cs"> 7 // Copyright by Huang Zhenghui(黃正輝) All, QQ group:568015492 QQ:623128629 Email:[email protected] 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("點擊節點事件"), Category("自定義")] 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("選中的節點"), Category("自定義")] 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("節點串列"), Category("自定義")] 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("角標顏色"), Category("自定義")] 89 public Color TipColor 90 { 91 get { return tipColor; } 92 set { tipColor = value; } 93 } 94 95 /// <summary> 96 /// 獲取或設定控制元件的前景色， 97 /// </summary> 98 /// <value>The color of the fore.</value> 99 /// <PermissionSet>100 /// <IPermission 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 /// 獲取或設定控制元件顯示的文字的字體，119 /// </summary>120 /// <value>The font.</value>121 /// <PermissionSet>122 /// <IPermission version="1" Unrestricted="true" />123 /// <IPermission version="1" Unrestricted="true" />124 /// <IPermission version="1" Flags="UnmanagedCode, ControlEvidence" />125 /// <IPermission 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 = "選單" + (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 //檢查已經打開的節點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);//分割線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 =https://www.cnblogs.com/bfyx/p/= 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)//頂級節點支持圖示和角標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("微軟雅黑", 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 }View Code
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