（五十三）c#Winform自定义控件-滚动文字 - 好文

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
<https://github.com/kwwwvagaa/NetWinformControl>

码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
<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
<https://shang.qq.com/wpa/qunwpa?idkey=6e08741ef16fe53bf0314c1c9e336c4f626047943a8b76bac062361bab6b4f8d>

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
<https://www.cnblogs.com/bfyx/p/11364884.html>

用处及效果

准备工作

依然是GDI+画的，如果不了解可以百度下先

开始

添加一个枚举，用以控制移动方向
1 public enum RollStyle 2 { 3 LeftToRight, 4 RightToLeft, 5 BackAndForth 6
}

添加一个类UCRollText，继承UserControl

添加几个控制属性
1 public override Font Font 2 { 3 get 4 { 5 return base.Font; 6 } 7
set 8 { 9 base.Font = value; 10 if (!string.IsNullOrEmpty(Text)) 11 { 12
Graphics g =this.CreateGraphics(); 13 var size = g.MeasureString(Text, this
.Font);14 rectText = new Rectangle(0, (this.Height - rectText.Height) / 2 + 1, (
int)size.Width, (int)size.Height); 15 rectText.Y = (this.Height -
rectText.Height) /2 + 1; 16 } 17 } 18 } 19 20 public override Color ForeColor
21 { 22 get 23 { 24 return base.ForeColor; 25 } 26 set 27 { 28 base
.ForeColor = value; 29 } 30 } 31 32 public override string Text 33 { 34 get
35 { 36 return base.Text; 37 } 38 set 39 { 40 base.Text = value; 41 if (!
string.IsNullOrEmpty(value)) 42 { 43 Graphics g = this.CreateGraphics(); 44 var
size = g.MeasureString(value,this.Font); 45 rectText = new Rectangle(0, (this
.Height - rectText.Height) /2 + 1, (int)size.Width, (int)size.Height); 46 } 47
else 48 { 49 rectText = Rectangle.Empty; 50 } 51 } 52 } 53 54 private
RollStyle _RollStyle = RollStyle.LeftToRight; 55 56 [Description("滚动样式"),
Category("自定义")] 57 public RollStyle RollStyle 58 { 59 get { return
_RollStyle; }60 set 61 { 62 _RollStyle = value; 63 switch (value) 64 { 65 case
RollStyle.LeftToRight:66 m_intdirection = 1; 67 break; 68 case
RollStyle.RightToLeft:69 m_intdirection = -1; 70 break; 71 } 72 } 73 } 74 75
private int _moveStep = 5; 76 77 private int _moveSleepTime = 100; 78 79
[Description("每次滚动间隔时间，越小速度越快"), Category("自定义")] 80 public int MoveSleepTime 81
{82 get { return _moveSleepTime; } 83 set 84 { 85 if (value <= 0) 86 return;
87 88 _moveSleepTime = value; 89 m_timer.Interval = value; 90 } 91 } 92 93 int
m_intdirection =1; 94 95 Rectangle rectText; 96 Timer m_timer;
构造函数处理一些事情
1 public UCRollText() 2 { 3 this
.SetStyle(ControlStyles.AllPaintingInWmPaint,true); 4 this
.SetStyle(ControlStyles.DoubleBuffer,true); 5 this
.SetStyle(ControlStyles.ResizeRedraw,true); 6 this
.SetStyle(ControlStyles.Selectable,true); 7 this
.SetStyle(ControlStyles.SupportsTransparentBackColor,true); 8 this
.SetStyle(ControlStyles.UserPaint,true); 9 10 this.SizeChanged +=
UCRollText_SizeChanged;11 this.Size = new Size(450, 30); 12 Text = "滚动文字"; 13
m_timer =new Timer(); 14 m_timer.Interval = 100; 15 m_timer.Tick +=
m_timer_Tick;16 this.Load += UCRollText_Load; 17 this.VisibleChanged +=
UCRollText_VisibleChanged;18 this.ForeColor = Color.FromArgb(255, 77, 59); 19 if
(rectText != Rectangle.Empty) 20 { 21 rectText.Y = (this.Height -
rectText.Height) /2 + 1; 22 } 23 }
加载的时候处理一下初始位置
1 void UCRollText_Load(object sender, EventArgs e) 2 { 3 if (_RollStyle ==
HZH_Controls.Controls.RollStyle.LeftToRight) 4 { 5 m_intdirection = 1; 6 if
(rectText != Rectangle.Empty) 7 { 8 rectText.X = -1 * rectText.Width - 1; 9
}10 } 11 else if (_RollStyle == HZH_Controls.Controls.RollStyle.RightToLeft)
12 { 13 m_intdirection = -1; 14 if (rectText != Rectangle.Empty) 15 { 16
rectText.X =this.Width + rectText.Width + 1; 17 } 18 } 19 else 20 { 21
m_intdirection =1; 22 if (rectText != Rectangle.Empty) 23 { 24 rectText.X = 0;
25 } 26 } 27 if (rectText != Rectangle.Empty) 28 { 29 rectText.Y = (this
.Height - rectText.Height) /2 + 1; 30 } 31 }
定时器里面处理位置
1 void m_timer_Tick(object sender, EventArgs e) 2 { 3 if (rectText ==
Rectangle.Empty) 4 return; 5 if (_RollStyle ==
HZH_Controls.Controls.RollStyle.BackAndForth && rectText.Width >=this.Width) 6
{ 7 return; 8 } 9 rectText.X = rectText.X + _moveStep * m_intdirection; 10
if (_RollStyle == HZH_Controls.Controls.RollStyle.BackAndForth) 11 { 12 if
(rectText.X <=0) 13 { 14 m_intdirection = 1; 15 } 16 else if (rectText.Right
>=this.Width) 17 { 18 m_intdirection = -1; 19 } 20 } 21 else if (_RollStyle
== HZH_Controls.Controls.RollStyle.LeftToRight) 22 { 23 if (rectText.X > this
.Width)24 { 25 rectText.X = -1 * rectText.Width - 1; 26 } 27 } 28 else 29 {
30 if (rectText.Right < 0) 31 { 32 rectText.X = this.Width + rectText.Width + 1
;33 } 34 } 35 Refresh(); 36 }
重绘
1 protected override void OnPaint(PaintEventArgs e) 2 { 3 base.OnPaint(e); 4
if (rectText != Rectangle.Empty) 5 { 6 e.Graphics.SetGDIHigh(); 7
e.Graphics.DrawString(Text, Font,new SolidBrush(ForeColor), rectText.Location);
8 } 9 }
完整代码
1 // 版权所有黄正辉交流群：568015492 QQ：623128629 2 // 文件名称：UCRollText.cs 3 //
作　　者：HZH 4 // 创建日期：2019-09-03 09:59:12 5 // 功能描述：UCRollText English:UCRollText
6 // 项目地址：https://gitee.com/kwwwvagaa/net_winform_custom_control 7 // 项目地址：
https://github.com/kwwwvagaa/NetWinformControl 8 // 如果你使用了此类，请保留以上说明 9 using
System; 10 using System.Collections.Generic; 11 using System.Linq; 12 using
System.Text; 13 using System.Windows.Forms; 14 using System.Drawing; 15 using
System.Drawing.Drawing2D; 16 using System.ComponentModel; 17 18 namespace
HZH_Controls.Controls 19 { 20 public class UCRollText : UserControl 21 { 22
public override Font Font 23 { 24 get 25 { 26 return base.Font; 27 } 28
set 29 { 30 base.Font = value; 31 if (!string.IsNullOrEmpty(Text)) 32 {
33 Graphics g = this.CreateGraphics(); 34 var size = g.MeasureString(Text, this
.Font); 35 rectText = new Rectangle(0, (this.Height - rectText.Height) / 2 + 1,
(int)size.Width, (int)size.Height); 36 rectText.Y = (this.Height -
rectText.Height) /2 + 1; 37 } 38 } 39 } 40 41 public override Color
ForeColor 42 { 43 get 44 { 45 return base.ForeColor; 46 } 47 set 48 {
49 base.ForeColor = value; 50 } 51 } 52 53 public override string Text
54 { 55 get 56 { 57 return base.Text; 58 } 59 set 60 { 61 base.Text =
value; 62 if (!string.IsNullOrEmpty(value)) 63 { 64 Graphics g = this
.CreateGraphics(); 65 var size = g.MeasureString(value, this.Font); 66
rectText =new Rectangle(0, (this.Height - rectText.Height) / 2 + 1, (int
)size.Width, (int)size.Height); 67 } 68 else 69 { 70 rectText =
Rectangle.Empty; 71 } 72 } 73 } 74 75 private RollStyle _RollStyle =
RollStyle.LeftToRight; 76 77 [Description("滚动样式"), Category("自定义")] 78 public
RollStyle RollStyle 79 { 80 get { return _RollStyle; } 81 set 82 { 83
_RollStyle = value; 84 switch (value) 85 { 86 case RollStyle.LeftToRight:
87 m_intdirection = 1; 88 break; 89 case RollStyle.RightToLeft: 90
m_intdirection = -1; 91 break; 92 } 93 } 94 } 95 96 private int
_moveStep =5; 97 98 private int _moveSleepTime = 100; 99 100 [Description("
每次滚动间隔时间，越小速度越快"), Category("自定义")] 101 public int MoveSleepTime 102 { 103 get
{return _moveSleepTime; } 104 set 105 { 106 if (value <= 0) 107 return; 108 109
_moveSleepTime = value; 110 m_timer.Interval = value; 111 } 112 } 113 114 int
m_intdirection =1; 115 116 Rectangle rectText; 117 Timer m_timer; 118 public
UCRollText()119 { 120 this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
121 this.SetStyle(ControlStyles.DoubleBuffer, true); 122 this
.SetStyle(ControlStyles.ResizeRedraw,true); 123 this
.SetStyle(ControlStyles.Selectable,true); 124 this
.SetStyle(ControlStyles.SupportsTransparentBackColor,true); 125 this
.SetStyle(ControlStyles.UserPaint,true); 126 127 this.SizeChanged +=
UCRollText_SizeChanged;128 this.Size = new Size(450, 30); 129 Text = "滚动文字"; 130
m_timer =new Timer(); 131 m_timer.Interval = 100; 132 m_timer.Tick +=
m_timer_Tick;133 this.Load += UCRollText_Load; 134 this.VisibleChanged +=
UCRollText_VisibleChanged;135 this.ForeColor = Color.FromArgb(255, 77, 59); 136
if (rectText != Rectangle.Empty) 137 { 138 rectText.Y = (this.Height -
rectText.Height) /2 + 1; 139 } 140 } 141 142 void m_timer_Tick(object sender,
EventArgs e)143 { 144 if (rectText == Rectangle.Empty) 145 return; 146 if
(_RollStyle == HZH_Controls.Controls.RollStyle.BackAndForth && rectText.Width >=
this.Width) 147 { 148 return; 149 } 150 rectText.X = rectText.X + _moveStep *
m_intdirection;151 if (_RollStyle ==
HZH_Controls.Controls.RollStyle.BackAndForth)152 { 153 if (rectText.X <= 0) 154
{155 m_intdirection = 1; 156 } 157 else if (rectText.Right >= this.Width) 158
{159 m_intdirection = -1; 160 } 161 } 162 else if (_RollStyle ==
HZH_Controls.Controls.RollStyle.LeftToRight)163 { 164 if (rectText.X > this
.Width)165 { 166 rectText.X = -1 * rectText.Width - 1; 167 } 168 } 169 else
170 { 171 if (rectText.Right < 0) 172 { 173 rectText.X = this.Width +
rectText.Width +1; 174 } 175 } 176 Refresh(); 177 } 178 179 void
UCRollText_VisibleChanged(object sender, EventArgs e) 180 { 181
m_timer.Enabled =this.Visible; 182 } 183 184 void UCRollText_Load(object
sender, EventArgs e)185 { 186 if (_RollStyle ==
HZH_Controls.Controls.RollStyle.LeftToRight)187 { 188 m_intdirection = 1; 189
if (rectText != Rectangle.Empty) 190 { 191 rectText.X = -1 * rectText.Width - 1
;192 } 193 } 194 else if (_RollStyle ==
HZH_Controls.Controls.RollStyle.RightToLeft)195 { 196 m_intdirection = -1; 197
if (rectText != Rectangle.Empty) 198 { 199 rectText.X = this.Width +
rectText.Width +1; 200 } 201 } 202 else 203 { 204 m_intdirection = 1; 205 if
(rectText != Rectangle.Empty) 206 { 207 rectText.X = 0; 208 } 209 } 210 if
(rectText != Rectangle.Empty) 211 { 212 rectText.Y = (this.Height -
rectText.Height) /2 + 1; 213 } 214 } 215 216 void UCRollText_SizeChanged(
object sender, EventArgs e) 217 { 218 if (rectText != Rectangle.Empty) 219 {
220 rectText.Y = (this.Height - rectText.Height) / 2 + 1; 221 } 222 } 223 224
protected override void OnPaint(PaintEventArgs e) 225 { 226 base.OnPaint(e);
227 if (rectText != Rectangle.Empty) 228 { 229 e.Graphics.SetGDIHigh(); 230
e.Graphics.DrawString(Text, Font,new SolidBrush(ForeColor), rectText.Location);
231 } 232 } 233 } 234 235 public enum RollStyle 236 { 237 LeftToRight, 238
RightToLeft,239 BackAndForth 240 } 241 } View Code

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