分割线控件----------WinForm控件开发系列

该控件是继承于 Control 基类开发的。这个控件没有什么技术性的东西。因为功能比较简单。主要重写了 OnPaint 方法如下
  1         protected override void OnPaint(PaintEventArgs e)
  2         {
  3             base.OnPaint(e);
  4 
  5             Graphics g = e.Graphics;
  6 
  7             int text_padding = 2;
  8             SizeF text_size = SizeF.Empty;
  9             RectangleF text_rect = RectangleF.Empty;
 10 
 11             Pen line_pen = new Pen(this.LineColor, this.LineThickness);
 12             int circular = this.lineCircular ? this.LineThickness : 0;
 13             PointF line_left_s = PointF.Empty;
 14             PointF line_left_e = PointF.Empty;
 15             PointF line_right_s = PointF.Empty;
 16             PointF line_right_e = PointF.Empty;
 17 
 18             #region 文字
 19             if (!String.IsNullOrEmpty(this.Text))
 20             {
 21                 SolidBrush text_sb = new SolidBrush(this.ForeColor);
 22                 StringFormat text_sf = null;
 23 
 24                 #region
 25                 if (this.LineOrientation == LineOrientations.Horizontal)
 26                 {
 27                     text_size = g.MeasureString(this.Text, this.Font, 1000, text_sf);
 28                     #region
 29                     float y = 0;
 30                     if (this.textAlign == TextAligns.Top)
 31                     {
 32                         y = (this.ClientRectangle.Height - (this.lineThickness + text_size.Height)) / 2f;
 33                     }
 34                     else if (this.textAlign == TextAligns.Center)
 35                     {
 36                         y = (this.ClientRectangle.Height - text_size.Height) / 2f;
 37                     }
 38                     else if (this.textAlign == TextAligns.Bottom)
 39                     {
 40                         y = (this.ClientRectangle.Height - (this.lineThickness + text_padding + text_size.Height)) / 2f + this.lineThickness+ text_padding;
 41                     }
 42                     #endregion
 43                     if (this.TextOrientation == TextOrientations.Left)
 44                     {
 45                         text_rect = new RectangleF(this.ClientRectangle.X + this.textDistance, y, text_size.Width, text_size.Height);
 46                     }
 47                     else
 48                     {
 49                         text_rect = new RectangleF(this.ClientRectangle.Right - this.textDistance - text_size.Width, y, text_size.Width, text_size.Height);
 50                     }
 51                 }
 52                 #endregion
 53                 #region
 54                 else
 55                 {
 56                     text_sf = new StringFormat() { FormatFlags = StringFormatFlags.DirectionVertical };
 57                     text_size = g.MeasureString(this.Text, this.Font, 1000, text_sf);
 58                     #region
 59                     float x = 0;
 60                     if (this.textAlign == TextAligns.Top)
 61                     {
 62                         x = (this.ClientRectangle.Width - (this.lineThickness + text_size.Width)) / 2f;
 63                     }
 64                     else if (this.textAlign == TextAligns.Center)
 65                     {
 66                         x = (this.ClientRectangle.Width - text_size.Width) / 2f;
 67                     }
 68                     else if (this.textAlign == TextAligns.Bottom)
 69                     {
 70                         x = (this.ClientRectangle.Width - (this.lineThickness + text_padding + text_size.Width)) / 2f + this.lineThickness + text_padding;
 71                     }
 72                     #endregion
 73                     if (this.TextOrientation == TextOrientations.Left)
 74                     {
 75                         text_rect = new RectangleF(x, this.ClientRectangle.Y + this.textDistance, text_size.Width, text_size.Height);
 76                     }
 77                     else
 78                     {
 79                         text_rect = new RectangleF(x, this.ClientRectangle.Bottom - this.textDistance - text_size.Height, text_size.Width, text_size.Height);
 80                     }
 81                 }
 82                 #endregion
 83 
 84                 g.DrawString(this.Text, this.Font, text_sb, text_rect, text_sf);
 85                 text_sb.Dispose();
 86                 if (text_sf != null)
 87                 {
 88                     text_sf.Dispose();
 89                 }
 90             }
 91             #endregion
 92 
 93             #region 线条
 94             #region 两条线
 95             if (!String.IsNullOrEmpty(this.Text) && this.textAlign == TextAligns.Center)
 96             {
 97                 if (this.LineOrientation == LineOrientations.Horizontal)
 98                 {
 99                     #region
100                     float y = 0;
101                     if (this.textAlign == TextAligns.Top)
102                     {
103                         y = text_rect.Bottom + this.LineThickness / 2f;
104                     }
105                     else if (this.textAlign == TextAligns.Center)
106                     {
107                         y = this.ClientRectangle.Height / 2f;
108                     }
109                     else if (this.textAlign == TextAligns.Bottom)
110                     {
111                         y = text_rect.Y - this.LineThickness / 2f;
112                     }
113                     #endregion
114                     line_left_s = new PointF(this.ClientRectangle.X + circular, y);
115                     line_left_e = new PointF(text_rect.X - text_padding, y);
116                     line_right_s = new PointF(text_rect.Right + text_padding, y);
117                     line_right_e = new PointF(this.ClientRectangle.Right - circular, y);
118                 }
119                 else
120                 {
121                     #region
122                     float x = 0;
123                     if (this.textAlign == TextAligns.Top)
124                     {
125                         x = text_rect.Right + this.LineThickness / 2f;
126                     }
127                     else if (this.textAlign == TextAligns.Center)
128                     {
129                         x = this.ClientRectangle.Width / 2f;
130                     }
131                     else if (this.textAlign == TextAligns.Bottom)
132                     {
133                         x = text_rect.X - this.LineThickness / 2f;
134                     }
135                     #endregion
136                     line_left_s = new PointF(x, this.ClientRectangle.Y + circular);
137                     line_left_e = new PointF(x, text_rect.Y - text_padding);
138                     line_right_s = new PointF(x, text_rect.Bottom + text_padding);
139                     line_right_e = new PointF(x, this.ClientRectangle.Bottom - circular);
140                 }
141                 if (this.lineCircular)
142                 {
143                     g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
144                     line_pen.StartCap = LineCap.Round;
145                     g.DrawLine(line_pen, line_left_s, line_left_e);
146                     line_pen.StartCap = LineCap.Flat;
147                     line_pen.EndCap = LineCap.Round;
148                     g.DrawLine(line_pen, line_right_s, line_right_e);
149                 }
150                 else
151                 {
152                     g.DrawLine(line_pen, line_left_s, line_left_e);
153                     g.DrawLine(line_pen, line_right_s, line_right_e);
154                 }
155             }
156             #endregion
157             #region 一条线
158             else
159             {
160                 if (this.LineOrientation == LineOrientations.Horizontal)
161                 {
162                     #region
163                     float y = 0;
164                     if (this.textAlign == TextAligns.Top)
165                     {
166                         y = text_rect.Bottom + this.LineThickness / 2f;
167                     }
168                     else if (this.textAlign == TextAligns.Center)
169                     {
170                         y = this.ClientRectangle.Height / 2f;
171                     }
172                     else if (this.textAlign == TextAligns.Bottom)
173                     {
174                         y = text_rect.Y- text_padding - this.LineThickness / 2f;
175                     }
176                     #endregion
177                     line_left_s = new PointF(this.ClientRectangle.X + circular, y);
178                     line_left_e = new PointF(this.ClientRectangle.Right - circular, y);
179                 }
180                 else
181                 {
182                     #region
183                     float x = 0;
184                     if (this.textAlign == TextAligns.Top)
185                     {
186                         x = text_rect.Right + this.LineThickness / 2f;
187                     }
188                     else if (this.textAlign == TextAligns.Center)
189                     {
190                         x = this.ClientRectangle.Width / 2f;
191                     }
192                     else if (this.textAlign == TextAligns.Bottom)
193                     {
194                         x = text_rect.X - text_padding - this.LineThickness / 2f;
195                     }
196                     #endregion
197                     line_left_s = new PointF(x, this.ClientRectangle.Y + circular);
198                     line_left_e = new PointF(x, this.ClientRectangle.Bottom - circular);
199                 }
200                 if (this.lineCircular)
201                 {
202                     g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
203                     line_pen.StartCap = LineCap.Round;
204                     line_pen.EndCap = LineCap.Round;
205                 }
206                 g.DrawLine(line_pen, line_left_s, line_left_e);
207             }
208             #endregion
209 
210             line_pen.Dispose();
211             #endregion
212 
213         }
新增属性如下
控件库的源码已整体发布到gitee，下载地址：（花木兰控件库）https://gitee.com/tlmbem/hml
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原文地址：https://www.cnblogs.com/tlmbem/p/13573872.html