WinForm(C#)自定义控件之——RoundButton(圆形按钮)

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Diagnostics;
  5 using System.Linq;
  6 using System.Text;
  7 
  8 using System.Windows.Forms;
  9 using System.Drawing;
 10 using System.Drawing.Drawing2D;
 11 
 12 namespace 章鱼.Forms
 13 {
 14     public partial class RoundButton : Button
 15     {
 16         #region --成员变量--
 17 
 18         RectangleF rect = new RectangleF();//控件矩形
 19         bool mouseEnter;//鼠标是否进入控件区域的标志
 20         bool buttonPressed;//按钮是否按下
 21         bool buttonClicked;//按钮是否被点击
 22         #endregion
 23 
 24         #region --属性--
 25 
 26         #region 形状
 27 
 28         /// <summary>
 29         /// 设置或获取圆形按钮的圆的边距离方框边的距离
 30         /// </summary>
 31         [Browsable(true), DefaultValue(2)]
 32         [Category("Appearance")]
 33         public int DistanceToBorder { get; set; }
 34 
 35         #endregion
 36 
 37         #region 填充色      
 38         
 39         /// <summary>
 40         /// 获取或设置按钮主体颜色
 41         /// </summary>
 42         /// <value>The color of the focus.</value>
 43         [Browsable(true), DefaultValue(typeof(Color), "DodgerBlue"), Description("按钮主体渐变起始颜色")]
 44         [Category("Appearance")]
 45         public Color ButtonCenterColorEnd { get; set; }
 46 
 47         /// <summary>
 48         /// 获取或设置按钮主体颜色
 49         /// </summary>
 50         [Browsable(true), DefaultValue(typeof(Color), "CornflowerBlue"), Description("按钮主体渐变终点颜色")]
 51         [Category("Appearance")]
 52         public Color ButtonCenterColorStart { get; set; }
 53         
 54         /// <summary>
 55         /// 获取或设置按钮主体颜色渐变方向
 56         /// </summary>
 57         [Browsable(true), DefaultValue(90),Description("按钮主体颜色渐变方向，X轴顺时针开始")]
 58         [Category("Appearance")]
 59         public int GradientAngle { get; set; }
 60 
 61         /// <summary>
 62         /// 是否显示中间标志
 63         /// </summary>        
 64         [Browsable(true), DefaultValue(typeof(bool), "true"), Description("是否显示中间标志")]
 65         [Category("Appearance")]
 66         public bool IsShowIcon { get; set; }
 67 
 68         /// <summary>
 69         /// 按钮中间标志填充色
 70         /// </summary>
 71         [Browsable(true), DefaultValue(typeof(Color), "Black"), Description("按钮中间标志填充色")]
 72         [Category("Appearance")]
 73         public Color IconColor { get; set; }
 74 
 75 
 76         #endregion
 77 
 78         #region 边框
 79 
 80         /// <summary>
 81         /// 获取或设置边框大小
 82         /// </summary>
 83         [Browsable(true), DefaultValue(4), Description("按钮边框大小")]
 84         [Category("Appearance")]
 85         public int BorderWidth { get; set; }
 86 
 87         /// <summary>
 88         /// 获取或设置按钮边框颜色
 89         /// </summary>
 90         /// <value>The color of the focus.</value>
 91         [Browsable(true), DefaultValue(typeof(Color), "Black"), Description("按钮边框颜色")]
 92         [Category("Appearance")]
 93         public Color BorderColor { get; set; }
 94 
 95         /// <summary>
 96         /// 获取或设置边框透明度
 97         /// </summary>
 98         [Browsable(true), DefaultValue(200),Description("设置边框透明度：0-255")]
 99         [Category("Appearance")]
100         public int BorderTransparent { get; set; }
101 
102         /// <summary>
103         /// 获取或设置按钮获取焦点后边框颜色
104         /// </summary>
105         /// <value>The color of the focus.</value>
106         [Browsable(true), DefaultValue(typeof(Color), "Orange"), Description("按钮获得焦点后的边框颜色")]
107         [Category("Appearance")]
108         public Color FocusBorderColor { get; set; }
109 
110         #endregion
111 
112         #endregion
113 
114         #region --构造函数--
115         /// <summary>
116         /// 构造函数
117         /// </summary>
118         public RoundButton()
119         {
120             // 控件风格
121             SetStyle(ControlStyles.SupportsTransparentBackColor, true);
122             SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
123             SetStyle(ControlStyles.AllPaintingInWmPaint, true);
124             SetStyle(ControlStyles.ResizeRedraw, true);
125             SetStyle(ControlStyles.UserPaint, true);
126             //初始值设定
127             this.Height = this.Width = 80;
128 
129             DistanceToBorder = 4;
130             ButtonCenterColorStart = Color.CornflowerBlue;
131             ButtonCenterColorEnd = Color.DodgerBlue;
132             BorderColor = Color.Black;
133             FocusBorderColor = Color.Orange;
134             IconColor = Color.Black;
135             BorderWidth = 4;
136             BorderTransparent = 200;
137             GradientAngle = 90;
138             
139             mouseEnter = false;
140             buttonPressed = false;
141             buttonClicked = false;
142             IsShowIcon = true;
143 
144             InitializeComponent();
145         }
146         #endregion
147 
148         #region --重写部分事件--
149 
150         #region OnPaint事件
151 
152         /// <summary>
153         /// 控件绘制
154         /// </summary>
155         /// <param name="pevent"></param>
156         protected override void OnPaint(PaintEventArgs pevent)
157         {
158             //base.OnPaint(pevent);
159             base.OnPaintBackground(pevent);         
160     
161             Graphics g = pevent.Graphics;
162             g.InterpolationMode = InterpolationMode.HighQualityBicubic;
163             g.SmoothingMode = SmoothingMode.AntiAlias;//抗锯齿         
164 
165             myResize();//调整圆形区域
166             
167             var brush = new LinearGradientBrush(rect, ButtonCenterColorStart, ButtonCenterColorEnd, GradientAngle);
168 
169             PaintShape(g, brush, rect);//绘制按钮中心区域
170 
171             DrawBorder(g);//绘制边框            
172             
173             DrawStateIcon(g);//绘制按钮功能标志
174 
175             if (mouseEnter)
176             {
177                 DrawHighLight(g);//绘制高亮区域
178                 DrawStateIcon(g);//绘制按钮功能标志
179             }
180                        
181         }
182 
183         #endregion
184 
185         #region 鼠标
186 
187         /// <summary>
188         /// 鼠标点击事件
189         /// </summary>
190         /// <param name="e"></param>
191         protected override void OnMouseClick(MouseEventArgs e)
192         {            
193             base.OnMouseClick(e);
194             buttonClicked = !buttonClicked;           
195         }
196         /// <summary>
197         /// Raises the <see cref="E:System.Windows.Forms.Control.MouseUp"/> event.
198         /// </summary>
199         /// <param name="e">A <see cref="T:System.Windows.Forms.MouseEventArgs"/> that contains the event data.</param>
200         protected override void OnMouseUp(MouseEventArgs e)
201         {
202             base.OnMouseUp(e);
203             if (e.Button != MouseButtons.Left) return;
204             buttonPressed = false;
205             base.Invalidate();
206         }
207 
208         /// <summary>
209         /// Raises the <see cref="E:System.Windows.Forms.Control.MouseDown"/> event.
210         /// </summary>
211         /// <param name="e">A <see cref="T:System.Windows.Forms.MouseEventArgs"/> that contains the event data.</param>
212         protected override void OnMouseDown(MouseEventArgs e)
213         {
214             base.OnMouseDown(e);
215             if (e.Button != MouseButtons.Left) return;
216             buttonPressed = true;
217         }
218 
219         /// <summary>
220         /// 鼠标进入按钮
221         /// </summary>
222         /// <param name="e"></param>
223         protected override void OnMouseEnter(EventArgs e)
224         {
225             base.OnMouseEnter(e);
226             mouseEnter = true;
227         }
228 
229         /// <summary>
230         /// 鼠标离开控件
231         /// </summary>
232         /// <param name="e"></param>
233         protected override void OnMouseLeave(EventArgs e)
234         {
235             base.OnMouseLeave(e);
236             mouseEnter = false;
237         }
238 
239         #endregion
240         #endregion
241 
242         #region --自定义函数--
243 
244         private void DrawStateIcon(Graphics g)
245         {
246             if (IsShowIcon)
247             {
248                 if (buttonClicked)
249                 {
250                     GraphicsPath startIconPath = new GraphicsPath();
251                     int W = base.Width / 3;
252                     Point p1 = new Point(W, W);
253                     Point p2 = new Point(2 * W, W);
254                     Point p3 = new Point(2 * W, 2 * W);
255                     Point p4 = new Point(W, 2 * W);
256                     Point[] pts = { p1, p2, p3, p4 };
257                     startIconPath.AddLines(pts);
258                     Brush brush = new SolidBrush(IconColor);
259                     g.FillPath(brush, startIconPath);
260                 }
261                 else
262                 {
263                     GraphicsPath stopIconPath = new GraphicsPath();
264                     int W = base.Width / 4;
265                     Point p1 = new Point(3 * W / 2, W);
266                     Point p2 = new Point(3 * W / 2, 3 * W);
267                     Point p3 = new Point(3 * W, 2 * W);
268                     Point[] pts = { p1, p2, p3, };
269                     stopIconPath.AddLines(pts);
270                     Brush brush = new SolidBrush(IconColor);
271                     g.FillPath(brush, stopIconPath);
272                 }
273             }
274         }
275 
276         /// <summary>
277         /// 重新确定控件大小
278         /// </summary>
279         protected void myResize()
280         {
281             int x = DistanceToBorder;
282             int y = DistanceToBorder;
283             int width = this.Width - 2 * DistanceToBorder;
284             int height = this.Height - 2 * DistanceToBorder;
285             rect = new RectangleF(x, y, width, height);
286         }
287 
288         /// <summary>
289         /// 绘制高亮效果
290         /// </summary>
291         /// <param name="g">The graphics object</param>
292         protected virtual void DrawHighLight(Graphics g)
293         {
294             RectangleF highlightRect = rect;
295             highlightRect.Inflate(-BorderWidth/2, -BorderWidth/2);
296             Brush brush = Brushes.DodgerBlue;
297             if (buttonPressed)
298             {
299                 brush = new LinearGradientBrush(rect, ButtonCenterColorStart, ButtonCenterColorEnd, GradientAngle);
300             }
301 
302             else
303             {
304                 brush = new LinearGradientBrush(rect, Color.FromArgb(60, Color.White),
305               Color.FromArgb(60, Color.White), GradientAngle);
306             }
307             PaintShape(g, brush, highlightRect);
308         }
309 
310         /// <summary>
311         /// 绘制边框
312         /// </summary>
313         /// <param name="g">Graphics对象</param>
314         protected virtual void DrawBorder(Graphics g)
315         {  
316             Pen p=new Pen(BorderColor);
317             if (Focused) 
318             {
319                 p.Color = FocusBorderColor;//外圈获取焦点后的颜色
320                 p.Width = BorderWidth;
321                 PaintShape(g, p, rect);                                
322             }
323             else 
324             {                
325                 p.Width = BorderWidth;
326                 PaintShape(g, p, rect);
327             }
328             
329         }
330 
331         /// <summary>
332         /// 
333         /// </summary>
334         /// <param name="g">The graphics object</param>
335         protected virtual void DrawPressState(Graphics g)
336         {
337             RectangleF pressedRect = rect;
338             pressedRect.Inflate(-2, -2);
339             Brush brush = new LinearGradientBrush(rect, Color.FromArgb(60, Color.White),
340                 Color.FromArgb(60, Color.White), GradientAngle);
341             PaintShape(g, brush, pressedRect);
342         }
343 
344         /// <summary>
345         /// 绘制图形
346         /// </summary>
347         /// <param name="g">Graphics对象</param>
348         /// <param name="pen">Pen对象</param>
349         /// <param name="rect">RectangleF对象</param>
350         protected virtual void PaintShape(Graphics g, Pen pen, RectangleF rect)
351         {
352             g.DrawEllipse(pen, rect);
353         }
354 
355         /// <summary>
356         /// 绘制图形 
357         /// </summary>
358         /// <param name="g">Graphics对象</param>
359         /// <param name="brush">Brush对象</param>
360         /// <param name="rect">Rectangle对象</param>
361         protected virtual void PaintShape(Graphics g, Brush brush, RectangleF rect)
362         {
363             g.FillEllipse(brush, rect);
364            
365         }
366 
367         #endregion
368     }
369 }