2021-05-21 仓库温控系统(Winform) 11 扩展控件-CircleButton

骑猪看日落 2023-01-23 02:54 12阅读 0赞

public partial class UCircleButton : Button
        { 
                public UCircleButton()
                { 
                        InitializeComponent();
                }
                private const int WM_PAINT = 0xF;
                private Color bgColor = Color.Gray;
                /// <summary>
                /// 背景色（渐变色中，颜色1）
                /// </summary>
                [DefaultValue(typeof(Color), "Gray"), Description("控件背景色")]
                public Color BgColor
                { 
                        get {  return bgColor; }
                        set
                        { 
                                bgColor = value;
                                Invalidate();
                        }
                }
    
                [DefaultValue(typeof(Color), "Transparent"), Description("控件背景颜色2")]
                private Color bgColor2 = Color.Transparent;
                public Color BgColor2
                { 
                        get {  return bgColor2; }
                        set
                        { 
                                bgColor2 = value;
                                Invalidate();
                        }
                }
    
    
                private Color borderColor = Color.Gray;
                [DefaultValue(typeof(Color), "Gray"), Description("控件边框颜色")]
                public Color BorderColor
                { 
                        get {  return borderColor; }
                        set
                        { 
                                borderColor = value;
                                Invalidate();
                        }
                }
    
                private int borderWidth = 0;
                [DefaultValue(typeof(int), "0"), Description("控件边框粗细")]
                public int BorderWidth
                { 
                        get {  return borderWidth; }
                        set
                        { 
                                borderWidth = value;
                                Invalidate();
                        }
                }
    
    
                [DefaultValue(typeof(int), "5"), Description("圆角弧度大小")]
                private int radius = 5;
                public int Radius
                { 
                        get {  return radius; }
                        set
                        { 
                                radius = value;
                                Invalidate();
                        }
                }
    
                [DefaultValue(typeof(LinearGradientMode), "Vertical"), Description("渐变方式")]
                private LinearGradientMode gradientMode = LinearGradientMode.Vertical;
                public LinearGradientMode GradientMode
                { 
                        get {  return gradientMode; }
                        set
                        { 
                                gradientMode = value;
                                Invalidate();
                        }
                }
    
        //protected override void OnMouseLeave(EventArgs e)
        //{ 
        // base.OnMouseLeave(e);
        //}
    
        //protected override void OnMouseEnter(EventArgs e)
        //{ 
        // base.OnMouseEnter(e);
        //}
    
        protected override void WndProc(ref Message m)
        { 
            base.WndProc(ref m);
            if (m.Msg == WM_PAINT)
            { 
                //绘制工作：重绘边框、背景、按钮文本Text
                if (this.Radius > 0)
                { 
                    using (Graphics g = Graphics.FromHwnd(this.Handle))
                    { 
                        g.SmoothingMode = SmoothingMode.AntiAlias;
                        Rectangle r = new Rectangle();
                        r.Width = this.Width;
                        r.Height = this.Height;
                        DrawBorder(g, r, this.Radius);//绘制边框和背景还有文本
                    }
                }
            }
        }
    
        private void DrawBorder(Graphics g, Rectangle rect, int radius)
        { 
            rect.Width -= 1;
            rect.Height -= 1;
    
            if (BorderWidth > 0)//边框粗细》0
            { 
                GraphicsPath path = new GraphicsPath();
                path = PaintCommon.GetRoundRectangle(rect, radius);//绘制圆角矩形路径
                using (Pen pen = new Pen(this.BorderColor, BorderWidth))
                { 
                    g.DrawPath(pen, path);
                }
            }
            //背景区域的矩形
            Rectangle rect1 = new Rectangle(rect.X + BorderWidth, rect.Y + BorderWidth, rect.Width - 2 * BorderWidth, rect.Height - 2 * BorderWidth);
            DrawBackColor(g, rect1, radius);// 绘制背景
            //绘制按钮文本
            StringFormat format = new StringFormat();
            format.LineAlignment = StringAlignment.Center;
            format.Alignment = StringAlignment.Center;
            Rectangle rect2 = new Rectangle( 5, 5, rect.Width - 10, rect.Height - 10);
            g.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), rect1, format);
        }
    
        /// <summary>
        /// 绘制背景
        /// </summary>
        /// <param name="g"></param>
        /// <param name="rect1"></param>
        /// <param name="radius"></param>
        private void DrawBackColor(Graphics g, Rectangle rect, int radius)
        { 
            //获取背景区域的圆角矩形
            GraphicsPath path1 = PaintCommon.GetRoundRectangle(rect, radius);
            if (this.BgColor2 != Color.Transparent)
            { 
                //线型渐变画刷
                LinearGradientBrush brush = new LinearGradientBrush(rect, BgColor, BgColor2, gradientMode);
                g.FillPath(brush, path1);//填充圆角矩形内部
            }
            else
            { 
                Brush b = new SolidBrush(BgColor);
                g.FillPath(b, path1);//填充圆角矩形内部
            }
        }
    }