（七十九）c#Winform自定义控件-导航菜单
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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
欢迎前来交流探讨： 企鹅群568015492 
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
public class NavigationMenuItem
{
/// <summary>
/// The icon
/// </summary>
private Image icon;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
[Description("图标，仅顶级节点有效")]
public Image Icon
{
get { return icon; }
set { icon = value; }
} /// <summary>
/// The text
/// </summary>
private string text;
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value> [Description("文本")]
public string Text
{
get { return text; }
set { text = value; }
} /// <summary>
/// The show tip
/// </summary>
private bool showTip;
/// <summary>
/// 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
/// </summary>
/// <value><c>true</c> if [show tip]; otherwise, <c>false</c>.</value>
[Description("是否显示角标，仅顶级节点有效")]
public bool ShowTip
{
get { return showTip; }
set { showTip = value; }
} /// <summary>
/// The tip text
/// </summary>
private string tipText;
/// <summary>
/// Gets or sets the tip text
/// </summary>
/// <value>The tip text.</value>
[Description("角标文字，仅顶级节点有效")]
public string TipText
{
get { return tipText; }
set { tipText = value; }
}
/// <summary>
/// The items
/// </summary>
private NavigationMenuItem[] items;
/// <summary>
/// Gets or sets the items.
/// </summary>
/// <value>The items.</value>
[Description("子项列表")]
public NavigationMenuItem[] Items
{
get { return items; }
set
{
items = value;
if (value != null)
{
foreach (var item in value)
{
item.ParentItem = this;
}
}
}
} /// <summary>
/// The anchor right
/// </summary>
private bool anchorRight; /// <summary>
/// Gets or sets a value indicating whether [anchor right].
/// </summary>
/// <value><c>true</c> if [anchor right]; otherwise, <c>false</c>.</value>
[Description("是否靠右对齐")]
public bool AnchorRight
{
get { return anchorRight; }
set { anchorRight = value; }
} /// <summary>
/// The item width
/// </summary>
private int itemWidth = ; /// <summary>
/// Gets or sets the width of the item.
/// </summary>
/// <value>The width of the item.</value>
[Description("宽度")]
public int ItemWidth
{
get { return itemWidth; }
set { itemWidth = value; }
} /// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
[Description("数据源")]
public object DataSource { get; set; }
/// <summary>
/// Gets or sets a value indicating whether this instance has split lint at top.
/// </summary>
/// <value><c>true</c> if this instance has split lint at top; otherwise, <c>false</c>.</value>
[Description("是否在此项顶部显示一个分割线")]
public bool HasSplitLintAtTop { get; set; } /// <summary>
/// Gets the parent item.
/// </summary>
/// <value>The parent item.</value>
[Description("父节点")]
public NavigationMenuItem ParentItem { get; private set; }
}
添加一个自定义控件UCNavigationMenu
添加一些属性
/// <summary>
/// Occurs when [click itemed].
/// </summary>
[Description("点击节点事件"), Category("自定义")] public event EventHandler ClickItemed;
/// <summary>
/// The select item
/// </summary>
private NavigationMenuItem selectItem = null; /// <summary>
/// Gets the select item.
/// </summary>
/// <value>The select item.</value>
[Description("选中的节点"), Category("自定义")]
public NavigationMenuItem SelectItem
{
get { return selectItem; }
private set { selectItem = value; }
} /// <summary>
/// The items
/// </summary>
NavigationMenuItem[] items; /// <summary>
/// Gets or sets the items.
/// </summary>
/// <value>The items.</value>
[Description("节点列表"), Category("自定义")]
public NavigationMenuItem[] Items
{
get { return items; }
set
{
items = value;
ReloadMenu();
}
} /// <summary>
/// The tip color
/// </summary>
private Color tipColor = Color.FromArgb(, , ); /// <summary>
/// Gets or sets the color of the tip.
/// </summary>
/// <value>The color of the tip.</value>
[Description("角标颜色"), Category("自定义")]
public Color TipColor
{
get { return tipColor; }
set { tipColor = value; }
} /// <summary>
/// 获取或设置控件的前景色。
/// </summary>
/// <value>The color of the fore.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override System.Drawing.Color ForeColor
{
get
{
return base.ForeColor;
}
set
{
base.ForeColor = value;
foreach (Control c in this.Controls)
{
c.ForeColor = value;
}
}
}
/// <summary>
/// 获取或设置控件显示的文字的字体。
/// </summary>
/// <value>The font.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
foreach (Control c in this.Controls)
{
c.Font = value;
}
}
} /// <summary>
/// The m LST anchors
/// </summary>
Dictionary<NavigationMenuItem, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItem, FrmAnchor>();
重载菜单
private void ReloadMenu()
{
try
{
ControlHelper.FreezeControl(this, true);
this.Controls.Clear();
if (items != null && items.Length > )
{
foreach (var item in items)
{
var menu = (NavigationMenuItem)item;
Label lbl = new Label();
lbl.AutoSize = false;
lbl.TextAlign = ContentAlignment.MiddleCenter;
lbl.Width = menu.ItemWidth;
lbl.Text = menu.Text; lbl.Font = Font;
lbl.ForeColor = ForeColor; lbl.Paint += lbl_Paint;
lbl.MouseEnter += lbl_MouseEnter;
lbl.Tag = menu;
lbl.Click += lbl_Click;
if (menu.AnchorRight)
{
lbl.Dock = DockStyle.Right;
}
else
{
lbl.Dock = DockStyle.Left;
}
this.Controls.Add(lbl); lbl.BringToFront();
} }
}
finally
{
ControlHelper.FreezeControl(this, false);
}
}
显示下级菜单
private void ShowMoreMenu(Label lbl)
{
var menu = (NavigationMenuItem)lbl.Tag;
if (CheckShow(menu))
{
if (menu.Items != null && menu.Items.Length > )
{
Panel panel = new Panel();
panel.BackColor = Color.White;
panel.Paint += panel_Paint;
panel.Padding = new System.Windows.Forms.Padding();
Size size = GetItemsSize(menu.Items);
var height = size.Height * menu.Items.Length + ;
height += menu.Items.Count(p => p.HasSplitLintAtTop);//分割线
if (size.Width < lbl.Width)
size.Width = lbl.Width;
panel.Size = new Size(size.Width, height); foreach (var item in menu.Items)
{
if (item.HasSplitLintAtTop)
{
UCSplitLine_H line = new UCSplitLine_H();
line.Dock = DockStyle.Top;
panel.Controls.Add(line);
line.BringToFront();
}
Label _lbl = new Label();
_lbl.Font = Font;
_lbl.ForeColor = this.BackColor;
_lbl.AutoSize = false;
_lbl.TextAlign = ContentAlignment.MiddleCenter;
_lbl.Height = size.Height;
_lbl.Text = item.Text;
_lbl.Dock = DockStyle.Top;
_lbl.BringToFront();
_lbl.Paint += lbl_Paint;
_lbl.MouseEnter += lbl_MouseEnter;
_lbl.Tag = item;
_lbl.Click += lbl_Click;
_lbl.Size = new System.Drawing.Size(size.Width, size.Height);
panel.Controls.Add(_lbl);
_lbl.BringToFront();
}
Point point = Point.Empty; if (menu.ParentItem != null)
{
Point p = lbl.Parent.PointToScreen(lbl.Location);
if (p.X + lbl.Width + panel.Width > Screen.PrimaryScreen.Bounds.Width)
{
point = new Point(- * panel.Width - , - * lbl.Height);
}
else
{
point = new Point(panel.Width + , - * lbl.Height);
}
}
m_lstAnchors[menu] = new FrmAnchor(lbl, panel, point);
m_lstAnchors[menu].FormClosing += UCNavigationMenu_FormClosing;
m_lstAnchors[menu].Show();
m_lstAnchors[menu].Size = new Size(size.Width, height);
}
} }
辅助函数
/// <summary>
/// Checks the show.
/// </summary>
/// <param name="menu">The menu.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckShow(NavigationMenuItem menu)
{
//检查已经打开的节点
if (m_lstAnchors.ContainsKey(menu))
{
CloseList(menu);
return false;
}
if (HasInCacheChild(menu))
{
if (m_lstAnchors.ContainsKey(menu.ParentItem))
{
CloseList(menu.ParentItem);
return true;
}
return false;
}
else
{
for (int i = ; i < ; )
{
try
{
foreach (var item in m_lstAnchors)
{
if (m_lstAnchors[item.Key] != null && !m_lstAnchors[item.Key].IsDisposed)
{
m_lstAnchors[item.Key].Close();
}
}
}
catch
{
continue;
}
i++;
}
m_lstAnchors.Clear();
return true;
}
} /// <summary>
/// Determines whether [has in cache child] [the specified menu].
/// </summary>
/// <param name="menu">The menu.</param>
/// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>
private bool HasInCacheChild(NavigationMenuItem menu)
{
foreach (var item in m_lstAnchors)
{
if (item.Key == menu)
{
return true;
}
else
{
if (item.Key.Items != null)
{
if (item.Key.Items.Contains(menu))
return true;
}
}
}
return false;
} /// <summary>
/// Closes the list.
/// </summary>
/// <param name="menu">The menu.</param>
private void CloseList(NavigationMenuItem menu)
{
if (menu.Items != null)
{
foreach (var item in menu.Items)
{
CloseList(item);
if (m_lstAnchors.ContainsKey(item))
{
if (m_lstAnchors[item] != null && !m_lstAnchors[item].IsDisposed)
{
m_lstAnchors[item].Close();
m_lstAnchors[item] = null;
m_lstAnchors.Remove(item);
}
}
}
}
}
一些事件
/// <summary>
/// Handles the Click event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void lbl_Click(object sender, EventArgs e)
{
Label lbl = sender as Label;
if (lbl.Tag != null)
{
var menu = (NavigationMenuItem)lbl.Tag;
if (menu.Items == null || menu.Items.Length <= )
{
selectItem = menu; while (m_lstAnchors.Count > )
{
try
{
foreach (var item in m_lstAnchors)
{
item.Value.Close();
m_lstAnchors.Remove(item.Key);
}
}
catch { }
} if (ClickItemed != null)
{
ClickItemed(this, e);
}
}
else
{
CloseList(menu);
if (m_lstAnchors.ContainsKey(menu))
{
if (m_lstAnchors[menu] != null && !m_lstAnchors[menu].IsDisposed)
{
m_lstAnchors[menu].Close();
}
m_lstAnchors.Remove(menu);
}
ShowMoreMenu(lbl);
}
}
} /// <summary>
/// Handles the MouseEnter event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void lbl_MouseEnter(object sender, EventArgs e)
{
Label lbl = sender as Label;
ShowMoreMenu(lbl);
}
/// <summary>
/// Handles the FormClosing event of the UCNavigationMenu control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="FormClosingEventArgs"/> instance containing the event data.</param>
void UCNavigationMenu_FormClosing(object sender, FormClosingEventArgs e)
{
FrmAnchor frm = sender as FrmAnchor;
if (m_lstAnchors.ContainsValue(frm))
{
foreach (var item in m_lstAnchors)
{
if (item.Value == frm)
{
m_lstAnchors.Remove(item.Key);
return;
}
}
}
} /// <summary>
/// Handles the Paint event of the panel control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
void panel_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SetGDIHigh();
Rectangle rect = new Rectangle(, , e.ClipRectangle.Width - , e.ClipRectangle.Height - );
var path = rect.CreateRoundedRectanglePath();
e.Graphics.DrawPath(new Pen(new SolidBrush(LineColors.Light)), path);
} /// <summary>
/// Gets the size of the items.
/// </summary>
/// <param name="items">The items.</param>
/// <returns>Size.</returns>
private Size GetItemsSize(NavigationMenuItem[] items)
{
Size size = Size.Empty;
if (items != null && items.Length > )
{
using (var g = this.CreateGraphics())
{
foreach (NavigationMenuItem item in items)
{
var s = g.MeasureString(item.Text, Font);
if (s.Width + > size.Width)
{
size.Width = (int)s.Width + ;
}
if (s.Height + > size.Height)
{
size.Height = (int)s.Height + ;
}
}
}
}
return size;
} /// <summary>
/// Handles the Paint event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
void lbl_Paint(object sender, PaintEventArgs e)
{
Label lbl = sender as Label;
if (lbl.Tag != null)
{
var menu = (NavigationMenuItem)lbl.Tag;
e.Graphics.SetGDIHigh();
if (menu.ParentItem == null)//顶级节点支持图标和角标
{
if (menu.ShowTip)
{
if (!string.IsNullOrEmpty(menu.TipText))
{
var rect = new Rectangle(lbl.Width - , lbl.Height / - , , );
var path = rect.CreateRoundedRectanglePath();
e.Graphics.FillPath(new SolidBrush(tipColor), path);
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 });
}
else
{
e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - , lbl.Height / - , , ));
}
}
if (menu.Icon != null)
{
e.Graphics.DrawImage(menu.Icon, new Rectangle(, (lbl.Height - ) / , , ), , , menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);
}
}
if (menu.ParentItem != null && menu.Items != null && menu.Items.Length > )
{
ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(this.BackColor), new Point(lbl.Width - , (lbl.Height - ) / ), , GraphDirection.Rightward);
}
}
}
完整代码
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-10-08
//
// ***********************************************************************
// <copyright file="UCNavigationMenu.cs">
// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
// </copyright>
//
// Blog: https://www.cnblogs.com/bfyx
// GitHub：https://github.com/kwwwvagaa/NetWinformControl
// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
//
// If you use this code, please keep this note.
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HZH_Controls.Forms; namespace HZH_Controls.Controls
{
/// <summary>
/// Class UCNavigationMenu.
/// Implements the <see cref="System.Windows.Forms.UserControl" />
/// </summary>
/// <seealso cref="System.Windows.Forms.UserControl" />
[DefaultEvent("ClickItemed")]
public partial class UCNavigationMenu : UserControl
{
/// <summary>
/// Occurs when [click itemed].
/// </summary>
[Description("点击节点事件"), Category("自定义")] public event EventHandler ClickItemed;
/// <summary>
/// The select item
/// </summary>
private NavigationMenuItem selectItem = null; /// <summary>
/// Gets the select item.
/// </summary>
/// <value>The select item.</value>
[Description("选中的节点"), Category("自定义")]
public NavigationMenuItem SelectItem
{
get { return selectItem; }
private set { selectItem = value; }
} /// <summary>
/// The items
/// </summary>
NavigationMenuItem[] items; /// <summary>
/// Gets or sets the items.
/// </summary>
/// <value>The items.</value>
[Description("节点列表"), Category("自定义")]
public NavigationMenuItem[] Items
{
get { return items; }
set
{
items = value;
ReloadMenu();
}
} /// <summary>
/// The tip color
/// </summary>
private Color tipColor = Color.FromArgb(, , ); /// <summary>
/// Gets or sets the color of the tip.
/// </summary>
/// <value>The color of the tip.</value>
[Description("角标颜色"), Category("自定义")]
public Color TipColor
{
get { return tipColor; }
set { tipColor = value; }
} /// <summary>
/// 获取或设置控件的前景色。
/// </summary>
/// <value>The color of the fore.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override System.Drawing.Color ForeColor
{
get
{
return base.ForeColor;
}
set
{
base.ForeColor = value;
foreach (Control c in this.Controls)
{
c.ForeColor = value;
}
}
}
/// <summary>
/// 获取或设置控件显示的文字的字体。
/// </summary>
/// <value>The font.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
foreach (Control c in this.Controls)
{
c.Font = value;
}
}
} /// <summary>
/// The m LST anchors
/// </summary>
Dictionary<NavigationMenuItem, FrmAnchor> m_lstAnchors = new Dictionary<NavigationMenuItem, FrmAnchor>(); /// <summary>
/// Initializes a new instance of the <see cref="UCNavigationMenu"/> class.
/// </summary>
public UCNavigationMenu()
{
InitializeComponent();
items = new NavigationMenuItem[];
if (ControlHelper.IsDesignMode())
{
items = new NavigationMenuItem[];
for (int i = ; i < ; i++)
{
items[i] = new NavigationMenuItem()
{
Text = "菜单" + (i + ),
AnchorRight = i >=
};
}
}
} /// <summary>
/// Reloads the menu.
/// </summary>
private void ReloadMenu()
{
try
{
ControlHelper.FreezeControl(this, true);
this.Controls.Clear();
if (items != null && items.Length > )
{
foreach (var item in items)
{
var menu = (NavigationMenuItem)item;
Label lbl = new Label();
lbl.AutoSize = false;
lbl.TextAlign = ContentAlignment.MiddleCenter;
lbl.Width = menu.ItemWidth;
lbl.Text = menu.Text; lbl.Font = Font;
lbl.ForeColor = ForeColor; lbl.Paint += lbl_Paint;
lbl.MouseEnter += lbl_MouseEnter;
lbl.Tag = menu;
lbl.Click += lbl_Click;
if (menu.AnchorRight)
{
lbl.Dock = DockStyle.Right;
}
else
{
lbl.Dock = DockStyle.Left;
}
this.Controls.Add(lbl); lbl.BringToFront();
} }
}
finally
{
ControlHelper.FreezeControl(this, false);
}
} /// <summary>
/// Handles the Click event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void lbl_Click(object sender, EventArgs e)
{
Label lbl = sender as Label;
if (lbl.Tag != null)
{
var menu = (NavigationMenuItem)lbl.Tag;
if (menu.Items == null || menu.Items.Length <= )
{
selectItem = menu; while (m_lstAnchors.Count > )
{
try
{
foreach (var item in m_lstAnchors)
{
item.Value.Close();
m_lstAnchors.Remove(item.Key);
}
}
catch { }
} if (ClickItemed != null)
{
ClickItemed(this, e);
}
}
else
{
CloseList(menu);
if (m_lstAnchors.ContainsKey(menu))
{
if (m_lstAnchors[menu] != null && !m_lstAnchors[menu].IsDisposed)
{
m_lstAnchors[menu].Close();
}
m_lstAnchors.Remove(menu);
}
ShowMoreMenu(lbl);
}
}
} /// <summary>
/// Handles the MouseEnter event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void lbl_MouseEnter(object sender, EventArgs e)
{
Label lbl = sender as Label;
ShowMoreMenu(lbl);
} /// <summary>
/// Checks the show.
/// </summary>
/// <param name="menu">The menu.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckShow(NavigationMenuItem menu)
{
//检查已经打开的节点
if (m_lstAnchors.ContainsKey(menu))
{
CloseList(menu);
return false;
}
if (HasInCacheChild(menu))
{
if (m_lstAnchors.ContainsKey(menu.ParentItem))
{
CloseList(menu.ParentItem);
return true;
}
return false;
}
else
{
for (int i = ; i < ; )
{
try
{
foreach (var item in m_lstAnchors)
{
if (m_lstAnchors[item.Key] != null && !m_lstAnchors[item.Key].IsDisposed)
{
m_lstAnchors[item.Key].Close();
}
}
}
catch
{
continue;
}
i++;
}
m_lstAnchors.Clear();
return true;
}
} /// <summary>
/// Determines whether [has in cache child] [the specified menu].
/// </summary>
/// <param name="menu">The menu.</param>
/// <returns><c>true</c> if [has in cache child] [the specified menu]; otherwise, <c>false</c>.</returns>
private bool HasInCacheChild(NavigationMenuItem menu)
{
foreach (var item in m_lstAnchors)
{
if (item.Key == menu)
{
return true;
}
else
{
if (item.Key.Items != null)
{
if (item.Key.Items.Contains(menu))
return true;
}
}
}
return false;
} /// <summary>
/// Closes the list.
/// </summary>
/// <param name="menu">The menu.</param>
private void CloseList(NavigationMenuItem menu)
{
if (menu.Items != null)
{
foreach (var item in menu.Items)
{
CloseList(item);
if (m_lstAnchors.ContainsKey(item))
{
if (m_lstAnchors[item] != null && !m_lstAnchors[item].IsDisposed)
{
m_lstAnchors[item].Close();
m_lstAnchors[item] = null;
m_lstAnchors.Remove(item);
}
}
}
}
} /// <summary>
/// Shows the more menu.
/// </summary>
/// <param name="lbl">The label.</param>
private void ShowMoreMenu(Label lbl)
{
var menu = (NavigationMenuItem)lbl.Tag;
if (CheckShow(menu))
{
if (menu.Items != null && menu.Items.Length > )
{
Panel panel = new Panel();
panel.BackColor = Color.White;
panel.Paint += panel_Paint;
panel.Padding = new System.Windows.Forms.Padding();
Size size = GetItemsSize(menu.Items);
var height = size.Height * menu.Items.Length + ;
height += menu.Items.Count(p => p.HasSplitLintAtTop);//分割线
if (size.Width < lbl.Width)
size.Width = lbl.Width;
panel.Size = new Size(size.Width, height); foreach (var item in menu.Items)
{
if (item.HasSplitLintAtTop)
{
UCSplitLine_H line = new UCSplitLine_H();
line.Dock = DockStyle.Top;
panel.Controls.Add(line);
line.BringToFront();
}
Label _lbl = new Label();
_lbl.Font = Font;
_lbl.ForeColor = this.BackColor;
_lbl.AutoSize = false;
_lbl.TextAlign = ContentAlignment.MiddleCenter;
_lbl.Height = size.Height;
_lbl.Text = item.Text;
_lbl.Dock = DockStyle.Top;
_lbl.BringToFront();
_lbl.Paint += lbl_Paint;
_lbl.MouseEnter += lbl_MouseEnter;
_lbl.Tag = item;
_lbl.Click += lbl_Click;
_lbl.Size = new System.Drawing.Size(size.Width, size.Height);
panel.Controls.Add(_lbl);
_lbl.BringToFront();
}
Point point = Point.Empty; if (menu.ParentItem != null)
{
Point p = lbl.Parent.PointToScreen(lbl.Location);
if (p.X + lbl.Width + panel.Width > Screen.PrimaryScreen.Bounds.Width)
{
point = new Point(- * panel.Width - , - * lbl.Height);
}
else
{
point = new Point(panel.Width + , - * lbl.Height);
}
}
m_lstAnchors[menu] = new FrmAnchor(lbl, panel, point);
m_lstAnchors[menu].FormClosing += UCNavigationMenu_FormClosing;
m_lstAnchors[menu].Show();
m_lstAnchors[menu].Size = new Size(size.Width, height);
}
} } /// <summary>
/// Handles the FormClosing event of the UCNavigationMenu control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="FormClosingEventArgs"/> instance containing the event data.</param>
void UCNavigationMenu_FormClosing(object sender, FormClosingEventArgs e)
{
FrmAnchor frm = sender as FrmAnchor;
if (m_lstAnchors.ContainsValue(frm))
{
foreach (var item in m_lstAnchors)
{
if (item.Value == frm)
{
m_lstAnchors.Remove(item.Key);
return;
}
}
}
} /// <summary>
/// Handles the Paint event of the panel control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
void panel_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SetGDIHigh();
Rectangle rect = new Rectangle(, , e.ClipRectangle.Width - , e.ClipRectangle.Height - );
var path = rect.CreateRoundedRectanglePath();
e.Graphics.DrawPath(new Pen(new SolidBrush(LineColors.Light)), path);
} /// <summary>
/// Gets the size of the items.
/// </summary>
/// <param name="items">The items.</param>
/// <returns>Size.</returns>
private Size GetItemsSize(NavigationMenuItem[] items)
{
Size size = Size.Empty;
if (items != null && items.Length > )
{
using (var g = this.CreateGraphics())
{
foreach (NavigationMenuItem item in items)
{
var s = g.MeasureString(item.Text, Font);
if (s.Width + > size.Width)
{
size.Width = (int)s.Width + ;
}
if (s.Height + > size.Height)
{
size.Height = (int)s.Height + ;
}
}
}
}
return size;
} /// <summary>
/// Handles the Paint event of the lbl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="PaintEventArgs"/> instance containing the event data.</param>
void lbl_Paint(object sender, PaintEventArgs e)
{
Label lbl = sender as Label;
if (lbl.Tag != null)
{
var menu = (NavigationMenuItem)lbl.Tag;
e.Graphics.SetGDIHigh();
if (menu.ParentItem == null)//顶级节点支持图标和角标
{
if (menu.ShowTip)
{
if (!string.IsNullOrEmpty(menu.TipText))
{
var rect = new Rectangle(lbl.Width - , lbl.Height / - , , );
var path = rect.CreateRoundedRectanglePath();
e.Graphics.FillPath(new SolidBrush(tipColor), path);
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 });
}
else
{
e.Graphics.FillEllipse(new SolidBrush(tipColor), new Rectangle(lbl.Width - , lbl.Height / - , , ));
}
}
if (menu.Icon != null)
{
e.Graphics.DrawImage(menu.Icon, new Rectangle(, (lbl.Height - ) / , , ), , , menu.Icon.Width, menu.Icon.Height, GraphicsUnit.Pixel);
}
}
if (menu.ParentItem != null && menu.Items != null && menu.Items.Length > )
{
ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(this.BackColor), new Point(lbl.Width - , (lbl.Height - ) / ), , GraphDirection.Rightward);
}
}
}
}
}
最后的话
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