文章目录
用处及效果
准备工作
依然使用GDI+画图，不懂的先百度了解下
开始
添加一些枚举
public enum FunelChartAlignment
{
/// <summary>
/// The left
/// </summary>
Left,
/// <summary>
/// The center
/// </summary>
Center,
/// <summary>
/// The right
/// </summary>
Right
}
public enum FunelChartDirection
{
/// <summary>
/// Up
/// </summary>
UP,
/// <summary>
/// Down
/// </summary>
Down
}添加一个项实体
public class FunelChartItem
{
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value>
public string Text { get; set; }
/// <summary>
/// Gets or sets the value.
/// </summary>
/// <value>The value.</value>
public float Value { get; set; }
/// <summary>
/// Gets or sets the color of the value.
/// </summary>
/// <value>The color of the value.</value>
public System.Drawing.Color? ValueColor { get; set; }
/// <summary>
/// Gets or sets the color of the text fore.
/// </summary>
/// <value>The color of the text fore.</value>
public System.Drawing.Color? TextForeColor { get; set; }
}添加一个类UCFunnelChart ，继承UserControl
添加一些控制属性
/// <summary>
/// The title
/// </summary>
private string title;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题")]
public string Title
{
get { return title; }
set
{
title = value;
ResetTitleSize();
Invalidate();
}
}
/// <summary>
/// The title font
/// </summary>
private Font titleFont = new Font("微软雅黑", 12);
/// <summary>
/// Gets or sets the title font.
/// </summary>
/// <value>The title font.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题字体")]
public Font TitleFont
{
get { return titleFont; }
set
{
titleFont = value;
ResetTitleSize();
Invalidate();
}
}
/// <summary>
/// The title fore color
/// </summary>
private Color titleForeColor = Color.Black;
/// <summary>
/// Gets or sets the color of the title fore.
/// </summary>
/// <value>The color of the title fore.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题文字颜色")]
public Color TitleForeColor
{
get { return titleForeColor; }
set
{
titleForeColor = value;
Invalidate();
}
}
/// <summary>
/// The items
/// </summary>
private FunelChartItem[] items;
/// <summary>
/// Gets or sets the items.
/// </summary>
/// <value>The items.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置项目")]
public FunelChartItem[] Items
{
get { return items; }
set
{
items = value;
Invalidate();
}
}
/// <summary>
/// The direction
/// </summary>
private FunelChartDirection direction = FunelChartDirection.UP;
/// <summary>
/// Gets or sets the direction.
/// </summary>
/// <value>The direction.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置方向")]
public FunelChartDirection Direction
{
get { return direction; }
set
{
direction = value;
Invalidate();
}
}
/// <summary>
/// The alignment
/// </summary>
private FunelChartAlignment alignment = FunelChartAlignment.Center;
/// <summary>
/// Gets or sets the alignment.
/// </summary>
/// <value>The alignment.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置对齐方式")]
public FunelChartAlignment Alignment
{
get { return alignment; }
set
{
alignment = value;
Invalidate();
}
}
/// <summary>
/// The item text align
/// </summary>
private FunelChartAlignment itemTextAlign = FunelChartAlignment.Center;
/// <summary>
/// Gets or sets the item text align.
/// </summary>
/// <value>The item text align.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置文字位置")]
public FunelChartAlignment ItemTextAlign
{
get { return itemTextAlign; }
set
{
itemTextAlign = value;
ResetWorkingRect();
Invalidate();
}
}
/// <summary>
/// The show value
/// </summary>
private bool showValue = false;
/// <summary>
/// Gets or sets a value indicating whether [show value].
/// </summary>
/// <value><c>true</c> if [show value]; otherwise, <c>false</c>.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置是否显示值")]
public bool ShowValue
{
get { return showValue; }
set
{
showValue = value;
Invalidate();
}
}
/// <summary>
/// The value format
/// </summary>
private string valueFormat = "0.##";
/// <summary>
/// Gets or sets the value format.
/// </summary>
/// <value>The value format.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置值格式化")]
public string ValueFormat
{
get { return valueFormat; }
set
{
valueFormat = value;
Invalidate();
}
}
/// <summary>
/// The m rect working
/// </summary>
RectangleF m_rectWorking;
/// <summary>
/// The m title size
/// </summary>
SizeF m_titleSize = SizeF.Empty;
/// <summary>
/// The int split width
/// </summary>
int intSplitWidth = 1;构造函数初始化
public UCFunnelChart()
{
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.FontChanged += UCFunnelChart_FontChanged;
Font = new Font("微软雅黑", 8);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.SizeChanged += UCFunnelChart_SizeChanged;
Size = new System.Drawing.Size(150, 150);
items = new FunelChartItem[0];
if (ControlHelper.IsDesignMode())
{
items = new FunelChartItem[5];
for (int i = 0; i < 5; i++)
{
items[i] = new FunelChartItem()
{
Text = "item" + i,
Value = 10 * (i + 1)
};
}
}
}当大小及状态改变时 重新计算工作区域
void UCFunnelChart_FontChanged(object sender, EventArgs e)
{
ResetWorkingRect();
}
/// <summary>
/// Handles the SizeChanged event of the UCFunnelChart 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 UCFunnelChart_SizeChanged(object sender, EventArgs e)
{
ResetWorkingRect();
}
/// <summary>
/// Resets the working rect.
/// </summary>
private void ResetWorkingRect()
{
if (itemTextAlign == FunelChartAlignment.Center)
{
m_rectWorking = new RectangleF(0, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
else if (itemTextAlign == FunelChartAlignment.Left)
{
float fltMax = 0;
if (items != null && items.Length > 0)
{
using (Graphics g = this.CreateGraphics())
{
fltMax = items.Max(p => g.MeasureString(p.Text, Font).Width);
}
}
m_rectWorking = new RectangleF(fltMax, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width - fltMax, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
else
{
float fltMax = 0;
if (items != null && items.Length > 0)
{
using (Graphics g = this.CreateGraphics())
{
fltMax = items.Max(p => g.MeasureString(p.Text, Font).Width);
}
}
m_rectWorking = new RectangleF(0, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width - fltMax, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
}
/// <summary>
/// Resets the size of the title.
/// </summary>
private void ResetTitleSize()
{
if (string.IsNullOrEmpty(title))
{
m_titleSize = SizeF.Empty;
}
else
{
using (Graphics g = this.CreateGraphics())
{
m_titleSize = g.MeasureString(title, titleFont);
m_titleSize.Height += 20;
}
}
ResetWorkingRect();
}重绘
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh();
if (!string.IsNullOrEmpty(title))
{
g.DrawString(title, titleFont, new SolidBrush(titleForeColor), new RectangleF(0, 0, this.Width, m_titleSize.Height), new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
}
if (items == null || items.Length <= 0)
{
g.DrawString("没有数据", Font, new SolidBrush(Color.Black), this.m_rectWorking, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
return;
}
List<FunelChartItem> lstItems;
if (direction == FunelChartDirection.UP)
{
lstItems = items.OrderBy(p => p.Value).ToList();
}
else
{
lstItems = items.OrderByDescending(p => p.Value).ToList();
}
List<RectangleF> lstRects = new List<RectangleF>();
List<GraphicsPath> lstPaths = new List<GraphicsPath>();
float maxValue = lstItems.Max(p => p.Value);
float dblSplitHeight = m_rectWorking.Height / lstItems.Count;
for (int i = 0; i < lstItems.Count; i++)
{
FunelChartItem item = lstItems[i];
if (item.ValueColor == null || item.ValueColor == Color.Empty || item.ValueColor == Color.Transparent)
item.ValueColor = ControlHelper.Colors[i];
switch (alignment)
{
case FunelChartAlignment.Left:
lstRects.Add(new RectangleF(m_rectWorking.Left, m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
case FunelChartAlignment.Center:
lstRects.Add(new RectangleF(m_rectWorking.Left + (m_rectWorking.Width - (item.Value / maxValue * m_rectWorking.Width)) / 2, m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
case FunelChartAlignment.Right:
lstRects.Add(new RectangleF(m_rectWorking.Right - (item.Value / maxValue * m_rectWorking.Width), m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
}
}
for (int i = 0; i < lstRects.Count; i++)
{
var rect = lstRects[i];
GraphicsPath path = new GraphicsPath();
List<PointF> lstPoints = new List<PointF>();
if (direction == FunelChartDirection.UP)
{
switch (alignment)
{
case FunelChartAlignment.Left:
lstPoints.Add(new PointF(rect.Left, rect.Top));
if (i != 0)
{
lstPoints.Add(new PointF(lstRects[i - 1].Right, rect.Top));
}
break;
case FunelChartAlignment.Center:
if (i == 0)
{
lstPoints.Add(new PointF(rect.Left + rect.Width / 2, rect.Top));
}
else
{
lstPoints.Add(new PointF(lstRects[i - 1].Left, rect.Top));
lstPoints.Add(new PointF(lstRects[i - 1].Right, rect.Top));
}
break;
case FunelChartAlignment.Right:
if (i == 0)
{
lstPoints.Add(new PointF(rect.Right, rect.Top));
}
else
{
lstPoints.Add(new PointF(rect.Right - lstRects[i - 1].Width, rect.Top));
lstPoints.Add(new PointF(rect.Right, rect.Top));
}
break;
}
lstPoints.Add(new PointF(rect.Right, rect.Bottom - intSplitWidth));
lstPoints.Add(new PointF(rect.Left, rect.Bottom - intSplitWidth));
}
else
{
lstPoints.Add(new PointF(rect.Left, rect.Top + intSplitWidth));
lstPoints.Add(new PointF(rect.Right, rect.Top + intSplitWidth));
switch (alignment)
{
case FunelChartAlignment.Left:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Left, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(lstRects[i + 1].Right, rect.Bottom));
lstPoints.Add(new PointF(rect.Left, rect.Bottom));
}
break;
case FunelChartAlignment.Center:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Left + rect.Width / 2, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(lstRects[i + 1].Right, rect.Bottom));
lstPoints.Add(new PointF(lstRects[i + 1].Left, rect.Bottom));
}
break;
case FunelChartAlignment.Right:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Right, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(rect.Right, rect.Bottom));
lstPoints.Add(new PointF(lstRects[i + 1].Left, rect.Bottom));
}
break;
}
}
path.AddLines(lstPoints.ToArray());
path.CloseAllFigures();
// g.DrawPath(new Pen(new SolidBrush(lstItems[i].ValueColor.Value)), path);
g.FillPath(new SolidBrush(lstItems[i].ValueColor.Value), path);
//写字
if (itemTextAlign == FunelChartAlignment.Center)
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? Color.White : lstItems[i].TextForeColor.Value), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
}
else if (itemTextAlign == FunelChartAlignment.Left)
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value), new RectangleF(0, rect.Top, rect.Left, rect.Height), new StringFormat() { Alignment = StringAlignment.Far, LineAlignment = StringAlignment.Center });
g.DrawLine(new Pen(new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value)), rect.Left, rect.Top + rect.Height / 2, rect.Left + rect.Width / 2, rect.Top + rect.Height / 2);
}
else
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value), new RectangleF(rect.Right, rect.Top, this.Width - rect.Right, rect.Height), new StringFormat() { Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Center });
g.DrawLine(new Pen(new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value)), rect.Left + rect.Width / 2, rect.Top + rect.Height / 2, rect.Right, rect.Top + rect.Height / 2);
}
}
}完整代码
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-09-26
//
// ***********************************************************************
// <copyright file="UCFunnelChart.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 UCFunnelChart.
/// Implements the <see cref="System.Windows.Forms.UserControl" />
/// </summary>
/// <seealso cref="System.Windows.Forms.UserControl" />
public class UCFunnelChart : UserControl
{
/// <summary>
/// The title
/// </summary>
private string title;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题")]
public string Title
{
get { return title; }
set
{
title = value;
ResetTitleSize();
Invalidate();
}
}
/// <summary>
/// The title font
/// </summary>
private Font titleFont = new Font("微软雅黑", 12);
/// <summary>
/// Gets or sets the title font.
/// </summary>
/// <value>The title font.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题字体")]
public Font TitleFont
{
get { return titleFont; }
set
{
titleFont = value;
ResetTitleSize();
Invalidate();
}
}
/// <summary>
/// The title fore color
/// </summary>
private Color titleForeColor = Color.Black;
/// <summary>
/// Gets or sets the color of the title fore.
/// </summary>
/// <value>The color of the title fore.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置标题文字颜色")]
public Color TitleForeColor
{
get { return titleForeColor; }
set
{
titleForeColor = value;
Invalidate();
}
}
/// <summary>
/// The items
/// </summary>
private FunelChartItem[] items;
/// <summary>
/// Gets or sets the items.
/// </summary>
/// <value>The items.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置项目")]
public FunelChartItem[] Items
{
get { return items; }
set
{
items = value;
Invalidate();
}
}
/// <summary>
/// The direction
/// </summary>
private FunelChartDirection direction = FunelChartDirection.UP;
/// <summary>
/// Gets or sets the direction.
/// </summary>
/// <value>The direction.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置方向")]
public FunelChartDirection Direction
{
get { return direction; }
set
{
direction = value;
Invalidate();
}
}
/// <summary>
/// The alignment
/// </summary>
private FunelChartAlignment alignment = FunelChartAlignment.Center;
/// <summary>
/// Gets or sets the alignment.
/// </summary>
/// <value>The alignment.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置对齐方式")]
public FunelChartAlignment Alignment
{
get { return alignment; }
set
{
alignment = value;
Invalidate();
}
}
/// <summary>
/// The item text align
/// </summary>
private FunelChartAlignment itemTextAlign = FunelChartAlignment.Center;
/// <summary>
/// Gets or sets the item text align.
/// </summary>
/// <value>The item text align.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置文字位置")]
public FunelChartAlignment ItemTextAlign
{
get { return itemTextAlign; }
set
{
itemTextAlign = value;
ResetWorkingRect();
Invalidate();
}
}
/// <summary>
/// The show value
/// </summary>
private bool showValue = false;
/// <summary>
/// Gets or sets a value indicating whether [show value].
/// </summary>
/// <value><c>true</c> if [show value]; otherwise, <c>false</c>.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置是否显示值")]
public bool ShowValue
{
get { return showValue; }
set
{
showValue = value;
Invalidate();
}
}
/// <summary>
/// The value format
/// </summary>
private string valueFormat = "0.##";
/// <summary>
/// Gets or sets the value format.
/// </summary>
/// <value>The value format.</value>
[Browsable(true)]
[Category("自定义")]
[Description("获取或设置值格式化")]
public string ValueFormat
{
get { return valueFormat; }
set
{
valueFormat = value;
Invalidate();
}
}
/// <summary>
/// The m rect working
/// </summary>
RectangleF m_rectWorking;
/// <summary>
/// The m title size
/// </summary>
SizeF m_titleSize = SizeF.Empty;
/// <summary>
/// The int split width
/// </summary>
int intSplitWidth = 1;
/// <summary>
/// Initializes a new instance of the <see cref="UCFunnelChart"/> class.
/// </summary>
public UCFunnelChart()
{
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.FontChanged += UCFunnelChart_FontChanged;
Font = new Font("微软雅黑", 8);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.SizeChanged += UCFunnelChart_SizeChanged;
Size = new System.Drawing.Size(150, 150);
items = new FunelChartItem[0];
if (ControlHelper.IsDesignMode())
{
items = new FunelChartItem[5];
for (int i = 0; i < 5; i++)
{
items[i] = new FunelChartItem()
{
Text = "item" + i,
Value = 10 * (i + 1)
};
}
}
}
/// <summary>
/// Handles the FontChanged event of the UCFunnelChart 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 UCFunnelChart_FontChanged(object sender, EventArgs e)
{
ResetWorkingRect();
}
/// <summary>
/// Handles the SizeChanged event of the UCFunnelChart 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 UCFunnelChart_SizeChanged(object sender, EventArgs e)
{
ResetWorkingRect();
}
/// <summary>
/// Resets the working rect.
/// </summary>
private void ResetWorkingRect()
{
if (itemTextAlign == FunelChartAlignment.Center)
{
m_rectWorking = new RectangleF(0, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
else if (itemTextAlign == FunelChartAlignment.Left)
{
float fltMax = 0;
if (items != null && items.Length > 0)
{
using (Graphics g = this.CreateGraphics())
{
fltMax = items.Max(p => g.MeasureString(p.Text, Font).Width);
}
}
m_rectWorking = new RectangleF(fltMax, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width - fltMax, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
else
{
float fltMax = 0;
if (items != null && items.Length > 0)
{
using (Graphics g = this.CreateGraphics())
{
fltMax = items.Max(p => g.MeasureString(p.Text, Font).Width);
}
}
m_rectWorking = new RectangleF(0, m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10), this.Width - fltMax, this.Height - (m_titleSize.Height == 0 ? 0 : (m_titleSize.Height + 10)));
}
}
/// <summary>
/// Resets the size of the title.
/// </summary>
private void ResetTitleSize()
{
if (string.IsNullOrEmpty(title))
{
m_titleSize = SizeF.Empty;
}
else
{
using (Graphics g = this.CreateGraphics())
{
m_titleSize = g.MeasureString(title, titleFont);
m_titleSize.Height += 20;
}
}
ResetWorkingRect();
}
/// <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)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh();
if (!string.IsNullOrEmpty(title))
{
g.DrawString(title, titleFont, new SolidBrush(titleForeColor), new RectangleF(0, 0, this.Width, m_titleSize.Height), new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
}
if (items == null || items.Length <= 0)
{
g.DrawString("没有数据", Font, new SolidBrush(Color.Black), this.m_rectWorking, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
return;
}
List<FunelChartItem> lstItems;
if (direction == FunelChartDirection.UP)
{
lstItems = items.OrderBy(p => p.Value).ToList();
}
else
{
lstItems = items.OrderByDescending(p => p.Value).ToList();
}
List<RectangleF> lstRects = new List<RectangleF>();
List<GraphicsPath> lstPaths = new List<GraphicsPath>();
float maxValue = lstItems.Max(p => p.Value);
float dblSplitHeight = m_rectWorking.Height / lstItems.Count;
for (int i = 0; i < lstItems.Count; i++)
{
FunelChartItem item = lstItems[i];
if (item.ValueColor == null || item.ValueColor == Color.Empty || item.ValueColor == Color.Transparent)
item.ValueColor = ControlHelper.Colors[i];
switch (alignment)
{
case FunelChartAlignment.Left:
lstRects.Add(new RectangleF(m_rectWorking.Left, m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
case FunelChartAlignment.Center:
lstRects.Add(new RectangleF(m_rectWorking.Left + (m_rectWorking.Width - (item.Value / maxValue * m_rectWorking.Width)) / 2, m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
case FunelChartAlignment.Right:
lstRects.Add(new RectangleF(m_rectWorking.Right - (item.Value / maxValue * m_rectWorking.Width), m_rectWorking.Top + dblSplitHeight * i, item.Value / maxValue * m_rectWorking.Width, dblSplitHeight));
break;
}
}
for (int i = 0; i < lstRects.Count; i++)
{
var rect = lstRects[i];
GraphicsPath path = new GraphicsPath();
List<PointF> lstPoints = new List<PointF>();
if (direction == FunelChartDirection.UP)
{
switch (alignment)
{
case FunelChartAlignment.Left:
lstPoints.Add(new PointF(rect.Left, rect.Top));
if (i != 0)
{
lstPoints.Add(new PointF(lstRects[i - 1].Right, rect.Top));
}
break;
case FunelChartAlignment.Center:
if (i == 0)
{
lstPoints.Add(new PointF(rect.Left + rect.Width / 2, rect.Top));
}
else
{
lstPoints.Add(new PointF(lstRects[i - 1].Left, rect.Top));
lstPoints.Add(new PointF(lstRects[i - 1].Right, rect.Top));
}
break;
case FunelChartAlignment.Right:
if (i == 0)
{
lstPoints.Add(new PointF(rect.Right, rect.Top));
}
else
{
lstPoints.Add(new PointF(rect.Right - lstRects[i - 1].Width, rect.Top));
lstPoints.Add(new PointF(rect.Right, rect.Top));
}
break;
}
lstPoints.Add(new PointF(rect.Right, rect.Bottom - intSplitWidth));
lstPoints.Add(new PointF(rect.Left, rect.Bottom - intSplitWidth));
}
else
{
lstPoints.Add(new PointF(rect.Left, rect.Top + intSplitWidth));
lstPoints.Add(new PointF(rect.Right, rect.Top + intSplitWidth));
switch (alignment)
{
case FunelChartAlignment.Left:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Left, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(lstRects[i + 1].Right, rect.Bottom));
lstPoints.Add(new PointF(rect.Left, rect.Bottom));
}
break;
case FunelChartAlignment.Center:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Left + rect.Width / 2, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(lstRects[i + 1].Right, rect.Bottom));
lstPoints.Add(new PointF(lstRects[i + 1].Left, rect.Bottom));
}
break;
case FunelChartAlignment.Right:
if (i == lstRects.Count - 1)
{
lstPoints.Add(new PointF(rect.Right, rect.Bottom));
}
else
{
lstPoints.Add(new PointF(rect.Right, rect.Bottom));
lstPoints.Add(new PointF(lstRects[i + 1].Left, rect.Bottom));
}
break;
}
}
path.AddLines(lstPoints.ToArray());
path.CloseAllFigures();
// g.DrawPath(new Pen(new SolidBrush(lstItems[i].ValueColor.Value)), path);
g.FillPath(new SolidBrush(lstItems[i].ValueColor.Value), path);
//写字
if (itemTextAlign == FunelChartAlignment.Center)
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? Color.White : lstItems[i].TextForeColor.Value), rect, new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center });
}
else if (itemTextAlign == FunelChartAlignment.Left)
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value), new RectangleF(0, rect.Top, rect.Left, rect.Height), new StringFormat() { Alignment = StringAlignment.Far, LineAlignment = StringAlignment.Center });
g.DrawLine(new Pen(new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value)), rect.Left, rect.Top + rect.Height / 2, rect.Left + rect.Width / 2, rect.Top + rect.Height / 2);
}
else
{
g.DrawString(lstItems[i].Text + (ShowValue ? lstItems[i].Value.ToString("n" + valueFormat) : ""), Font, new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value), new RectangleF(rect.Right, rect.Top, this.Width - rect.Right, rect.Height), new StringFormat() { Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Center });
g.DrawLine(new Pen(new SolidBrush((lstItems[i].TextForeColor == null || lstItems[i].TextForeColor == Color.Empty || lstItems[i].TextForeColor == Color.Transparent) ? lstItems[i].ValueColor.Value : lstItems[i].TextForeColor.Value)), rect.Left + rect.Width / 2, rect.Top + rect.Height / 2, rect.Right, rect.Top + rect.Height / 2);
}
}
}
}
}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
作者：冰封一夏
出处： http://www.hzhcontrols.com/doc.html
HZHControls官网：http://www.hzhcontrols.com
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，
且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。
GitHub：https://github.com/kwwwvagaa/NetWinformControl
码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
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