（六十五）c#Winform自定义控件-思维导图/组织架构图（工业）
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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 
麻烦博客下方点个【推荐】，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
依然是用GDI+画的，不懂的可以先百度一下
开始
添加一个实体类，用以记录数据源节点信息
public class MindMappingItemEntity
{
/// <summary>
/// Gets or sets the identifier.
/// </summary>
/// <value>The identifier.</value>
public string ID { get; set; }
private string _text;
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value>
public string Text
{
get { return _text; }
set
{
_text = value;
ResetSize();
}
}
/// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
public object DataSource { get; set; }
/// <summary>
/// The childrens
/// </summary>
private MindMappingItemEntity[] _Childrens;
/// <summary>
/// Gets or sets the childrens.
/// </summary>
/// <value>The childrens.</value>
public MindMappingItemEntity[] Childrens
{
get { return _Childrens; }
set
{
_Childrens = value;
if (value != null && value.Length > )
{
value.ToList().ForEach(p => { if (p != null) { p.ParentItem = this; } });
}
}
}
/// <summary>
/// The back color
/// </summary>
private Color backColor = Color.Transparent; /// <summary>
/// Gets or sets the color of the back.
/// </summary>
/// <value>The color of the back.</value>
public Color BackColor
{
get { return backColor; }
set { backColor = value; }
} private Font font = new Font("微软雅黑", ); public Font Font
{
get { return font; }
set
{
font = value;
ResetSize();
}
} /// <summary>
/// The fore color
/// </summary>
private Color foreColor = Color.Black; /// <summary>
/// Gets or sets the color of the fore.
/// </summary>
/// <value>The color of the fore.</value>
public Color ForeColor
{
get { return foreColor; }
set { foreColor = value; }
}
private bool _IsExpansion = false;
/// <summary>
/// Gets or sets a value indicating whether the instance is expanded.
/// </summary>
/// <value><c>true</c> if this instance is expansion; otherwise, <c>false</c>.</value>
public bool IsExpansion
{
get
{
return _IsExpansion;
}
set
{
if (value == _IsExpansion)
return;
_IsExpansion = value;
if (!value)
{
_Childrens.ToList().ForEach(p => { if (p != null) { p.IsExpansion = false; } });
} }
} /// <summary>
/// Gets the parent item.
/// </summary>
/// <value>The parent item.</value>
public MindMappingItemEntity ParentItem { get; private set; }
/// <summary>
/// Gets all childrens maximum show count.
/// </summary>
/// <value>All childrens maximum show count.</value>
public int AllChildrensMaxShowHeight { get { return GetAllChildrensMaxShowHeight(); } }
/// <summary>
/// Gets the maximum level.
/// </summary>
/// <value>The maximum level.</value>
public int AllChildrensMaxShowWidth { get { return GetAllChildrensMaxShowWidth(); } } /// <summary>
/// Gets all childrens maximum show count.
/// </summary>
/// <returns>System.Int32.</returns>
private int GetAllChildrensMaxShowHeight()
{
if (!_IsExpansion || _Childrens == null || _Childrens.Length <= )
return ItemHeight + ;
else
{
return _Childrens.Sum(p => p == null ? : p.AllChildrensMaxShowHeight);
}
}
/// <summary>
/// Gets the maximum level.
/// </summary>
/// <returns>System.Int32.</returns>
private int GetAllChildrensMaxShowWidth()
{
if (!_IsExpansion || _Childrens == null || _Childrens.Length <= )
return ItemWidth + ;
else
{
return + _Childrens.Max(p => p == null ? : p.AllChildrensMaxShowWidth);
}
}
/// <summary>
/// Gets or sets the working rectangle.
/// </summary>
/// <value>The working rectangle.</value>
internal RectangleF WorkingRectangle { get; set; }
/// <summary>
/// Gets or sets the draw rectangle.
/// </summary>
/// <value>The draw rectangle.</value>
internal RectangleF DrawRectangle { get; set; }
/// <summary>
/// Gets or sets the expansion rectangle.
/// </summary>
/// <value>The expansion rectangle.</value>
internal RectangleF ExpansionRectangle { get; set; }
/// <summary>
/// Gets the height of the item.
/// </summary>
/// <value>The height of the item.</value>
private int ItemHeight { private get; private set; }
/// <summary>
/// Gets the width of the item.
/// </summary>
/// <value>The width of the item.</value>
private int ItemWidth { private get; private set; }
/// <summary>
/// Resets the size.
/// </summary>
private void ResetSize()
{
string _t = _text;
if (string.IsNullOrEmpty(_t))
{
_t = "aaaa";
}
Bitmap bit = new Bitmap(, );
var g = Graphics.FromImage(bit);
var size = g.MeasureString(_t, font);
g.Dispose();
bit.Dispose();
ItemHeight = (int)size.Height;
ItemWidth = (int)size.Width;
}
}
主要属性说明：
Text：显示文字
Childrens：子节点信息
BackColor：节点颜色
IsExpansion：是否展开子节点
ParentItem：父级节点
AllChildrensMaxShowHeight：该节点包含所有子节点需要显示的高度，通过私有函数GetAllChildrensMaxShowHeight()返回结果
AllChildrensMaxShowWidth：该节点包含所有子节点需要显示的宽度，通过私有函数GetAllChildrensMaxShowWidth()返回结果
WorkingRectangle：该节点以及所有子节点的工作区域
DrawRectangle：该节点的绘制区域
ExpansionRectangle：展开折叠按钮的绘制区域
ItemHeight：该节点的高度
ItemWidth：该节点的宽度
主要函数说明：
GetAllChildrensMaxShowHeight：获取当前节点及所有子节点需要的最大高度
GetAllChildrensMaxShowWidth：获取当前节点及所有子节点需要的最大宽度
ResetSize：当文本和字体改变时重新计算宽高
添加一个类UCMindMapping，继承UserControl
添加一些属性
/// <summary>
/// The line color
/// </summary>
private Color lineColor = Color.Black; /// <summary>
/// Gets or sets the color of the line.
/// </summary>
/// <value>The color of the line.</value>
[Description("线条颜色"), Category("自定义")]
public Color LineColor
{
get { return lineColor; }
set
{
lineColor = value;
Refresh();
}
}
/// <summary>
/// The split width
/// </summary>
private int splitWidth = ;
// private int itemHeight = 20;
/// <summary>
/// The padding
/// </summary>
private int padding = ; /// <summary>
/// The m rect working
/// </summary>
Rectangle m_rectWorking = Rectangle.Empty;
/// <summary>
/// Occurs when [item clicked].
/// </summary>
public event EventHandler ItemClicked;
/// <summary>
/// The data source
/// </summary>
private MindMappingItemEntity dataSource;
/// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
[Description("数据源"), Category("自定义")]
public MindMappingItemEntity DataSource
{
get { return dataSource; }
set
{
dataSource = value; ResetSize();
}
}
一个辅助函数，用以在大小过数据改变时计算工作区域和位置
/// <summary>
/// 重置大小
/// </summary>
private void ResetSize()
{
if (this.Parent == null)
return;
try
{
ControlHelper.FreezeControl(this, true);
if (dataSource == null)
{
m_rectWorking = Rectangle.Empty;
this.Size = this.Parent.Size;
}
else
{
int intWidth = dataSource.AllChildrensMaxShowWidth;
int intHeight = dataSource.AllChildrensMaxShowHeight;
this.Width = intWidth + padding * ;
this.Height = intHeight + padding * ;
if (this.Width < this.Parent.Width)
this.Width = this.Parent.Width;
m_rectWorking = new Rectangle(padding, padding, intWidth, intHeight);
if (this.Height > this.Parent.Height)
{
//this.Location = new Point(0, 0);
}
else
this.Location = new Point(, (this.Parent.Height - this.Height) / );
}
}
finally
{
ControlHelper.FreezeControl(this, false);
}
}
重绘
/// <summary>
/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
/// </summary>
/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
protected override void OnPaint(PaintEventArgs e)
{
try
{
base.OnPaint(e);
if (m_rectWorking == Rectangle.Empty || m_rectWorking == null)
return;
var g = e.Graphics;
g.SetGDIHigh(); int intHeight = dataSource.AllChildrensMaxShowHeight;
dataSource.WorkingRectangle = new RectangleF(m_rectWorking.Left, m_rectWorking.Top + (m_rectWorking.Height - intHeight) / , m_rectWorking.Width, intHeight); DrawItem(dataSource, g);
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "错误");
}
}
/// <summary>
/// 画节点
/// </summary>
/// <param name="item">The item.</param>
/// <param name="g">The g.</param>
private void DrawItem(MindMappingItemEntity item, Graphics g)
{
//节点
var size = g.MeasureString(item.Text, item.Font);
item.DrawRectangle = new RectangleF(item.WorkingRectangle.Left + , item.WorkingRectangle.Top + (item.WorkingRectangle.Height - size.Height) / + , size.Width + , size.Height + );
GraphicsPath drawPath = item.DrawRectangle.CreateRoundedRectanglePath();
g.FillPath(new SolidBrush(item.BackColor), drawPath);
g.DrawString(item.Text, item.Font, new SolidBrush(item.ForeColor), item.DrawRectangle.Location.X + , item.DrawRectangle.Location.Y + );
//子节点
if (item.Childrens != null && item.IsExpansion)
{
for (int i = ; i < item.Childrens.Length; i++)
{
var child = item.Childrens[i];
if (i == )
{
child.WorkingRectangle = new RectangleF(item.DrawRectangle.Right + splitWidth, item.WorkingRectangle.Top, item.WorkingRectangle.Width - (item.DrawRectangle.Width + splitWidth), child.AllChildrensMaxShowHeight);
}
else
{
child.WorkingRectangle = new RectangleF(item.DrawRectangle.Right + splitWidth, item.Childrens[i - ].WorkingRectangle.Bottom, item.WorkingRectangle.Width - (item.DrawRectangle.Width + splitWidth), child.AllChildrensMaxShowHeight);
}
DrawItem(child, g);
}
}
//连线
if (item.ParentItem != null)
{
g.DrawLines(new Pen(new SolidBrush(lineColor), ), new PointF[]
{
new PointF(item.ParentItem.DrawRectangle.Right,item.ParentItem.DrawRectangle.Top+item.ParentItem.DrawRectangle.Height/),
new PointF(item.ParentItem.DrawRectangle.Right+,item.ParentItem.DrawRectangle.Top+item.ParentItem.DrawRectangle.Height/),
//new PointF(item.ParentItem.DrawRectangle.Right+12,item.DrawRectangle.Top+item.DrawRectangle.Height/2),
new PointF(item.DrawRectangle.Left-,item.DrawRectangle.Top+item.DrawRectangle.Height/),
new PointF(item.DrawRectangle.Left,item.DrawRectangle.Top+item.DrawRectangle.Height/),
});
}
//展开折叠按钮
if (item.Childrens != null && item.Childrens.Length > )
{
RectangleF _rect = new RectangleF(item.DrawRectangle.Right + , item.DrawRectangle.Top + (item.DrawRectangle.Height - ) / , , );
item.ExpansionRectangle = _rect;
g.FillEllipse(new SolidBrush(this.BackColor), _rect);
g.DrawEllipse(new Pen(new SolidBrush(Color.Black)), _rect);
g.DrawLine(new Pen(new SolidBrush(lineColor)), _rect.Left + , _rect.Y + _rect.Height / , _rect.Right - , _rect.Y + _rect.Height / );
if (!item.IsExpansion)
{
g.DrawLine(new Pen(new SolidBrush(lineColor)), _rect.Left + _rect.Width / , _rect.Top + , _rect.Left + _rect.Width / , _rect.Bottom - );
}
}
}
控件的单击和双击时间来处理展开折叠事件
/// <summary>
/// 双击处理，主要用于检测节点双击展开折叠
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCMindMapping_DoubleClick(object sender, EventArgs e)
{
var mouseLocation = this.PointToClient(Control.MousePosition); bool bln = CheckExpansionDoubleClick(dataSource, mouseLocation);
if (bln)
{
ResetSize();
this.Parent.Refresh();
}
} /// <summary>
/// 单击处理，主要用于单击节点事件和，展开关闭圆圈处理
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCMindMapping_Click(object sender, EventArgs e)
{
var mouseLocation = this.PointToClient(Control.MousePosition); bool bln = CheckExpansionClick(dataSource, mouseLocation);
if (bln)
{
ResetSize();
this.Parent.Refresh();
}
}
/// <summary>
/// 双击检查
/// </summary>
/// <param name="item">The item.</param>
/// <param name="mouseLocation">The mouse location.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckExpansionDoubleClick(MindMappingItemEntity item, Point mouseLocation)
{
if (item == null)
return false;
else
{
if (item.DrawRectangle.Contains(mouseLocation))
{
item.IsExpansion = !item.IsExpansion;
return true;
}
if (item.Childrens != null && item.Childrens.Length > )
{
foreach (var child in item.Childrens)
{
var bln = CheckExpansionDoubleClick(child, mouseLocation);
if (bln)
return bln;
}
}
}
return false;
} /// <summary>
/// 单击检查
/// </summary>
/// <param name="item">The item.</param>
/// <param name="mouseLocation">The mouse location.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckExpansionClick(MindMappingItemEntity item, Point mouseLocation)
{
if (item == null)
return false;
else
{
if (ItemClicked != null && item.WorkingRectangle.Contains(mouseLocation))
{
ItemClicked(item, null);
}
else if (item.ExpansionRectangle.Contains(mouseLocation))
{
item.IsExpansion = !item.IsExpansion;
return true;
}
if (item.Childrens != null && item.Childrens.Length > )
{
foreach (var child in item.Childrens)
{
var bln = CheckExpansionClick(child, mouseLocation);
if (bln)
return bln;
}
}
}
return false;
}
完整代码
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-09-11
//
// ***********************************************************************
// <copyright file="UCMindMapping.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.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.ComponentModel; namespace HZH_Controls.Controls
{
/// <summary>
/// Class UCMindMapping.
/// Implements the <see cref="System.Windows.Forms.UserControl" />
/// </summary>
/// <seealso cref="System.Windows.Forms.UserControl" />
internal class UCMindMapping : UserControl
{
/// <summary>
/// The line color
/// </summary>
private Color lineColor = Color.Black; /// <summary>
/// Gets or sets the color of the line.
/// </summary>
/// <value>The color of the line.</value>
[Description("线条颜色"), Category("自定义")]
public Color LineColor
{
get { return lineColor; }
set
{
lineColor = value;
Refresh();
}
}
/// <summary>
/// The split width
/// </summary>
private int splitWidth = ;
// private int itemHeight = 20;
/// <summary>
/// The padding
/// </summary>
private int padding = ; /// <summary>
/// The m rect working
/// </summary>
Rectangle m_rectWorking = Rectangle.Empty;
/// <summary>
/// Occurs when [item clicked].
/// </summary>
public event EventHandler ItemClicked;
/// <summary>
/// The data source
/// </summary>
private MindMappingItemEntity dataSource;
/// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
[Description("数据源"), Category("自定义")]
public MindMappingItemEntity DataSource
{
get { return dataSource; }
set
{
dataSource = value; ResetSize();
}
}
/// <summary>
/// Initializes a new instance of the <see cref="UCMindMapping"/> class.
/// </summary>
public UCMindMapping()
{
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.ResizeRedraw, true);
this.SetStyle(ControlStyles.Selectable, true);
this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
this.SetStyle(ControlStyles.UserPaint, true);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.Click += UCMindMapping_Click;
this.DoubleClick += UCMindMapping_DoubleClick;
this.Load += UCMindMapping_Load;
} /// <summary>
/// Handles the Load event of the UCMindMapping 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 UCMindMapping_Load(object sender, EventArgs e)
{
if (this.Parent != null)
{
//父控件大小改变时重置大小和位置
this.Parent.SizeChanged += (a, b) =>
{
ResetSize();
};
}
} /// <summary>
/// 双击处理，主要用于检测节点双击展开折叠
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCMindMapping_DoubleClick(object sender, EventArgs e)
{
var mouseLocation = this.PointToClient(Control.MousePosition); bool bln = CheckExpansionDoubleClick(dataSource, mouseLocation);
if (bln)
{
ResetSize();
this.Parent.Refresh();
}
} /// <summary>
/// 单击处理，主要用于单击节点事件和，展开关闭圆圈处理
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCMindMapping_Click(object sender, EventArgs e)
{
var mouseLocation = this.PointToClient(Control.MousePosition); bool bln = CheckExpansionClick(dataSource, mouseLocation);
if (bln)
{
ResetSize();
this.Parent.Refresh();
}
} /// <summary>
/// 双击检查
/// </summary>
/// <param name="item">The item.</param>
/// <param name="mouseLocation">The mouse location.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckExpansionDoubleClick(MindMappingItemEntity item, Point mouseLocation)
{
if (item == null)
return false;
else
{
if (item.DrawRectangle.Contains(mouseLocation))
{
item.IsExpansion = !item.IsExpansion;
return true;
}
if (item.Childrens != null && item.Childrens.Length > )
{
foreach (var child in item.Childrens)
{
var bln = CheckExpansionDoubleClick(child, mouseLocation);
if (bln)
return bln;
}
}
}
return false;
} /// <summary>
/// 单击检查
/// </summary>
/// <param name="item">The item.</param>
/// <param name="mouseLocation">The mouse location.</param>
/// <returns><c>true</c> if XXXX, <c>false</c> otherwise.</returns>
private bool CheckExpansionClick(MindMappingItemEntity item, Point mouseLocation)
{
if (item == null)
return false;
else
{
if (ItemClicked != null && item.WorkingRectangle.Contains(mouseLocation))
{
ItemClicked(item, null);
}
else if (item.ExpansionRectangle.Contains(mouseLocation))
{
item.IsExpansion = !item.IsExpansion;
return true;
}
if (item.Childrens != null && item.Childrens.Length > )
{
foreach (var child in item.Childrens)
{
var bln = CheckExpansionClick(child, mouseLocation);
if (bln)
return bln;
}
}
}
return false;
} /// <summary>
/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
/// </summary>
/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
protected override void OnPaint(PaintEventArgs e)
{
try
{
base.OnPaint(e);
if (m_rectWorking == Rectangle.Empty || m_rectWorking == null)
return;
var g = e.Graphics;
g.SetGDIHigh(); int intHeight = dataSource.AllChildrensMaxShowHeight;
dataSource.WorkingRectangle = new RectangleF(m_rectWorking.Left, m_rectWorking.Top + (m_rectWorking.Height - intHeight) / , m_rectWorking.Width, intHeight); DrawItem(dataSource, g);
}
catch (Exception exc)
{
MessageBox.Show(exc.ToString(), "错误");
}
} /// <summary>
/// 画节点
/// </summary>
/// <param name="item">The item.</param>
/// <param name="g">The g.</param>
private void DrawItem(MindMappingItemEntity item, Graphics g)
{
//节点
var size = g.MeasureString(item.Text, item.Font);
item.DrawRectangle = new RectangleF(item.WorkingRectangle.Left + , item.WorkingRectangle.Top + (item.WorkingRectangle.Height - size.Height) / + , size.Width + , size.Height + );
GraphicsPath drawPath = item.DrawRectangle.CreateRoundedRectanglePath();
g.FillPath(new SolidBrush(item.BackColor), drawPath);
g.DrawString(item.Text, item.Font, new SolidBrush(item.ForeColor), item.DrawRectangle.Location.X + , item.DrawRectangle.Location.Y + );
//子节点
if (item.Childrens != null && item.IsExpansion)
{
for (int i = ; i < item.Childrens.Length; i++)
{
var child = item.Childrens[i];
if (i == )
{
child.WorkingRectangle = new RectangleF(item.DrawRectangle.Right + splitWidth, item.WorkingRectangle.Top, item.WorkingRectangle.Width - (item.DrawRectangle.Width + splitWidth), child.AllChildrensMaxShowHeight);
}
else
{
child.WorkingRectangle = new RectangleF(item.DrawRectangle.Right + splitWidth, item.Childrens[i - ].WorkingRectangle.Bottom, item.WorkingRectangle.Width - (item.DrawRectangle.Width + splitWidth), child.AllChildrensMaxShowHeight);
}
DrawItem(child, g);
}
}
//连线
if (item.ParentItem != null)
{
g.DrawLines(new Pen(new SolidBrush(lineColor), ), new PointF[]
{
new PointF(item.ParentItem.DrawRectangle.Right,item.ParentItem.DrawRectangle.Top+item.ParentItem.DrawRectangle.Height/),
new PointF(item.ParentItem.DrawRectangle.Right+,item.ParentItem.DrawRectangle.Top+item.ParentItem.DrawRectangle.Height/),
//new PointF(item.ParentItem.DrawRectangle.Right+12,item.DrawRectangle.Top+item.DrawRectangle.Height/2),
new PointF(item.DrawRectangle.Left-,item.DrawRectangle.Top+item.DrawRectangle.Height/),
new PointF(item.DrawRectangle.Left,item.DrawRectangle.Top+item.DrawRectangle.Height/),
});
}
//展开折叠按钮
if (item.Childrens != null && item.Childrens.Length > )
{
RectangleF _rect = new RectangleF(item.DrawRectangle.Right + , item.DrawRectangle.Top + (item.DrawRectangle.Height - ) / , , );
item.ExpansionRectangle = _rect;
g.FillEllipse(new SolidBrush(this.BackColor), _rect);
g.DrawEllipse(new Pen(new SolidBrush(Color.Black)), _rect);
g.DrawLine(new Pen(new SolidBrush(lineColor)), _rect.Left + , _rect.Y + _rect.Height / , _rect.Right - , _rect.Y + _rect.Height / );
if (!item.IsExpansion)
{
g.DrawLine(new Pen(new SolidBrush(lineColor)), _rect.Left + _rect.Width / , _rect.Top + , _rect.Left + _rect.Width / , _rect.Bottom - );
}
}
} /// <summary>
/// 重置大小
/// </summary>
private void ResetSize()
{
if (this.Parent == null)
return;
try
{
ControlHelper.FreezeControl(this, true);
if (dataSource == null)
{
m_rectWorking = Rectangle.Empty;
this.Size = this.Parent.Size;
}
else
{
int intWidth = dataSource.AllChildrensMaxShowWidth;
int intHeight = dataSource.AllChildrensMaxShowHeight;
this.Width = intWidth + padding * ;
this.Height = intHeight + padding * ;
if (this.Width < this.Parent.Width)
this.Width = this.Parent.Width;
m_rectWorking = new Rectangle(padding, padding, intWidth, intHeight);
if (this.Height > this.Parent.Height)
{
//this.Location = new Point(0, 0);
}
else
this.Location = new Point(, (this.Parent.Height - this.Height) / );
}
}
finally
{
ControlHelper.FreezeControl(this, false);
}
}
}
}
最后再添加一个父控件，来包裹该控件，用以可以有滚动条的处理
添加一个用户控件UCMindMappingPanel，控件上添加一个上面新增的ucMindMapping，
完整代码
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-09-11
//
// ***********************************************************************
// <copyright file="UCMindMappingPanel.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; namespace HZH_Controls.Controls
{
/// <summary>
/// Class UCMindMappingPanel.
/// Implements the <see cref="System.Windows.Forms.UserControl" />
/// </summary>
/// <seealso cref="System.Windows.Forms.UserControl" />
public partial class UCMindMappingPanel : UserControl
{
/// <summary>
/// The data source
/// </summary>
private MindMappingItemEntity dataSource; /// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
[Description("数据源"), Category("自定义")]
public MindMappingItemEntity DataSource
{
get { return dataSource; }
set
{
dataSource = value;
this.ucMindMapping1.DataSource = value;
}
}
/// <summary>
/// Gets or sets the data source.
/// </summary>
/// <value>The data source.</value>
[Description("数据源"), Category("自定义")]
public event EventHandler ItemClicked; /// <summary>
/// The line color
/// </summary>
private Color lineColor = Color.Black; /// <summary>
/// Gets or sets the color of the line.
/// </summary>
/// <value>The color of the line.</value>
[Description("线条颜色"), Category("自定义")]
public Color LineColor
{
get { return lineColor; }
set
{
lineColor = value;
this.ucMindMapping1.LineColor = value;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="UCMindMappingPanel"/> class.
/// </summary>
public UCMindMappingPanel()
{
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.ResizeRedraw, true);
this.SetStyle(ControlStyles.Selectable, true);
this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
this.SetStyle(ControlStyles.UserPaint, true);
InitializeComponent();
ucMindMapping1.ItemClicked += ucMindMapping1_ItemClicked;
} void ucMindMapping1_ItemClicked(object sender, EventArgs e)
{
if (ItemClicked != null)
{
ItemClicked(sender, e);
}
}
}
}
namespace HZH_Controls.Controls
{
partial class UCMindMappingPanel
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region 组件设计器生成的代码 /// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.ucMindMapping1 = new HZH_Controls.Controls.UCMindMapping();
this.SuspendLayout();
//
// ucMindMapping1
//
this.ucMindMapping1.Location = new System.Drawing.Point(, );
this.ucMindMapping1.Name = "ucMindMapping1";
this.ucMindMapping1.Size = new System.Drawing.Size(, );
this.ucMindMapping1.TabIndex = ;
//
// UCMindMappingPanel
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.AutoScroll = true;
this.BackColor = System.Drawing.Color.White;
this.Controls.Add(this.ucMindMapping1);
this.Name = "UCMindMappingPanel";
this.Size = new System.Drawing.Size(, );
this.ResumeLayout(false); } #endregion private UCMindMapping ucMindMapping1;
}
}
最后的话
如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧
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