在winform项目开发中，偶尔需要用到边框拖拽。
上效果图(鼠标没录制上，问题不大)
上代码
1 2 3 4 5 6 7 8 | private void Form1_Load(object sender, EventArgs e) {//使用方式 panelLeft.SetContorlMove(this, ContorlMove.Left); panelRight.SetContorlMove(this, ContorlMove.Right); panelTop.SetContorlMove(this, ContorlMove.Top); panelDown.SetContorlMove(this, ContorlMove.Down); dataGridView1.SetContorlMove(this, ContorlMove.All); } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 | using System;using System.Collections.Generic;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace MoveControlBorder{ public static class ContorlExt { #region 设置控件拖大拖小 public static void SetContorlMove(this DataGridView con, Form form, ContorlMove moveEnum, Size? maxSize = null, Size? minSize = null) { new SetContorlMove(con, form, moveEnum, maxSize, minSize); } public static void SetContorlMove(this Panel con, Form form, ContorlMove moveEnum, Size? maxSize = null, Size? minSize = null) { new SetContorlMove(con, form, moveEnum, maxSize, minSize); } #endregion } public enum ContorlMove { /// /// 左边可以拉动宽度调整 /// Left, /// /// 右边可以拉动宽度调整 /// Right, /// /// 上边框可以拉动高度调整 /// Top, /// /// 下边框可以拉动高度调整 /// Down, /// /// 四个边都可以调整 /// All /// /// 左上斜角 /// //LeftTop, //LeftDown, //RightTop, //RightDown } public class SetContorlMove { private Control CON; private Form FORM; private ContorlMove MOVEENUM; private Size MaxSize; private Size MinSize; private bool IsAll = false; public SetContorlMove(Control _con, Form _form, ContorlMove _moveEnum, Size? _maxSize, Size? _minSize) { CON = _con; FORM = _form; MOVEENUM = _moveEnum; if (_moveEnum==ContorlMove.All) { IsAll = true; } if (_maxSize != null) { MaxSize = (Size)_maxSize; } else { MaxSize = new Size() { Height = 1000, Width = 1000 }; } if (_minSize != null) { MinSize = (Size)_minSize; } else { MinSize = new Size() { Height = 100, Width = 100 }; } _con.MouseDown += new System.Windows.Forms.MouseEventHandler(MouseDown); _con.MouseLeave += new System.EventHandler(MouseLeave); _con.MouseMove += new System.Windows.Forms.MouseEventHandler(MouseMove); _con.MouseUp += new System.Windows.Forms.MouseEventHandler(MouseUp); } private void MouseUp(object sender, MouseEventArgs e) { if (IsAll) { MOVEENUM = ContorlMove.All; Now_MOVEENUM = ContorlMove.All; } moveflag = false; CON.Cursor = Cursors.Default; } bool moveflag = false; ContorlMove Now_MOVEENUM = ContorlMove.All; private void MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left && (CON.Cursor == Cursors.SizeWE || CON.Cursor == Cursors.SizeNS)) { if(MOVEENUM== ContorlMove.All)//判定当前按下了哪个的边 { Point ms = Control.MousePosition; Point p; p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5)//left { if (ms.Y >= p.Y) { Now_MOVEENUM = ContorlMove.Left; } } else if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5)//top { if (ms.X >= p.X) { Now_MOVEENUM = ContorlMove.Top; } } p = FORM.PointToScreen(new Point(CON.Location.X + CON.Width, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5)//right { if (ms.Y >= p.Y) { Now_MOVEENUM = ContorlMove.Right; } } p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y + CON.Height)); if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5)//down { if (ms.X >= p.X) { Now_MOVEENUM = ContorlMove.Down; } } } this.moveflag = true; } } private void MouseMove(object sender, MouseEventArgs e) { Point ms = Control.MousePosition; bool b = false; Point p; switch (MOVEENUM) { case ContorlMove.Left: p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5) { if (ms.Y >= p.Y) { b = true; CON.Cursor = Cursors.SizeWE; } } break; case ContorlMove.Right: p = FORM.PointToScreen(new Point(CON.Location.X + CON.Width, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5) { if (ms.Y >= p.Y) { b = true; CON.Cursor = Cursors.SizeWE; } } break; case ContorlMove.Top: p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y)); if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5) { if (ms.X >= p.X) { b = true; CON.Cursor = Cursors.SizeNS; } } break; case ContorlMove.Down: p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y + CON.Height)); if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5) { if (ms.X >= p.X) { b = true; CON.Cursor = Cursors.SizeNS; } } break; case ContorlMove.All://设置鼠标 p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5)//left { if (ms.Y >= p.Y) { b = true; CON.Cursor = Cursors.SizeWE; break; } } else if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5)//top { if (ms.X >= p.X) { b = true; CON.Cursor = Cursors.SizeNS; break; } } p = FORM.PointToScreen(new Point(CON.Location.X + CON.Width, CON.Location.Y)); if (ms.X > p.X - 5 && ms.X < p.X + 5)//right { if (ms.Y >= p.Y) { b = true; CON.Cursor = Cursors.SizeWE; break; } } p = FORM.PointToScreen(new Point(CON.Location.X, CON.Location.Y + CON.Height)); if (ms.Y > p.Y - 5 && ms.Y < p.Y + 5)//down { if (ms.X >= p.X) { b = true; CON.Cursor = Cursors.SizeNS; break; } } break; default: break; } if (!b && e.Button == MouseButtons.None) { CON.Cursor = Cursors.Default; } if (e.Button == MouseButtons.Left && moveflag) { if (Now_MOVEENUM!=ContorlMove.All) { MOVEENUM = Now_MOVEENUM; } switch (MOVEENUM) { case ContorlMove.Left: if (CON.Width + -e.X > MinSize.Width && CON.Width + -e.X < MaxSize.Width) { InvokeInt(WH.Width, -e.X);//修改宽度 } break; case ContorlMove.Right: if (e.X > MinSize.Width && e.X < MaxSize.Width) { InvokeInt(WH.Width, e.X);//修改宽度 } break; case ContorlMove.Top: if (CON.Height + -e.Y > MinSize.Height && CON.Width + -e.Y < MaxSize.Height) { InvokeInt(WH.Height, -e.Y); } break; case ContorlMove.Down: if (e.Y > MinSize.Height && e.Y < MaxSize.Height) { InvokeInt(WH.Height, e.Y); } break; default: break; } } } private enum WH { Width, Height } private void InvokeInt(WH wh, int val) { if (CON.InvokeRequired) { Action<int> actionDelegate = (v) => { switch (wh) { case WH.Width: if (MOVEENUM == ContorlMove.Right) { CON.Width = v; } else { CON.Width += v; CON.Location = new Point(CON.Location.X - v, CON.Location.Y); } break; case WH.Height: if (MOVEENUM == ContorlMove.Down) { CON.Height = v; } else { CON.Height += v; CON.Location = new Point(CON.Location.X, CON.Location.Y - v); } break; default: break; } }; CON.BeginInvoke(actionDelegate, val); //BeginInvoke方法是异步的， 它会另起一个子线程去完成工作线程 } else { switch (wh) { case WH.Width: if (MOVEENUM == ContorlMove.Right) { CON.Width = val; } else { CON.Width += val; CON.Location = new Point(CON.Location.X - val, CON.Location.Y); } break; case WH.Height: if (MOVEENUM == ContorlMove.Down) { CON.Height = val; } else { CON.Height += val; CON.Location = new Point(CON.Location.X, CON.Location.Y - val); } break; default: break; } } } private void MouseLeave(object sender, EventArgs e) { if (CON.Cursor == Cursors.SizeWE || CON.Cursor == Cursors.SizeNS) { CON.Cursor = Cursors.Default; } } }} |
作者：兮去┓( ´∀` )┏博客
出处：https://www.cnblogs.com/bklsj/p/16784749.html
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