（五十三）c#Winform自定义控件-滚动文字
（五十三）c#Winform自定义控件-滚动文字
冰封一夏
发布于 2019-09-09 17:12:01
发布于 2019-09-09 17:12:01
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
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 }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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原始发表：2019-09-03 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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