2021-05-21 仓库温控系统(Winform) 10 扩展控件-panel

谁践踏了优雅 2023-01-23 02:54 11阅读 0赞

public partial class UPanel : Panel
    { 
            private const int WM_PAINT = 0xF;
            public UPanel()
            { 
                    InitializeComponent();
            }
    
            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();
                    }
            }
    
            private Color borderColor = Color.Red;
            [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(Color), "Gray"), Description("控件背景颜色2")]
            private Color bgColor2 = Color.White;
            public Color BgColor2
            { 
                    get {  return bgColor2; }
                    set
                    { 
                            bgColor2 = 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 WndProc(ref Message m)
            { 
                    base.WndProc(ref m);
                    if(m.Msg==WM_PAINT)
                    { 
                            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);
                                    }
                            }
                    }
            }
    
            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
            }
    
            /// <summary>
            /// 绘制背景
            /// </summary>
            /// <param name="g"></param>
            /// <param name="rect"></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
                    }
            }
    }