图形化控件开发 - 矩形控件

最近这段时间,公司需要做一个图形化配置工具。

主要是有以下一些要求:

1、针对一些底层的智能设备(智能楼宇的控制器),通过COM口连接上,并通过相关协议读取参数值

2、支持一些基本的逻辑运算,以及公司业务的一些特性“点”,一种点可以看成一个图形化控件

3、参数在图形化工具上显示出来,工程人员直接设置图形属性设置参数值、连线等

4、支持在线和离线2种工作方式,设置好参数后直接在界面上下载到设备里

5、工作太支持拖动,连线,放大缩小,保存设计文件等

6、“点”的本身业务要求,略。。。

 

经过一番调研,winfrom的图形化控件技术,并没有成熟的框架出来。

只有一些零碎的demo,大体上的思路是通过重绘来实现具体的图形控件。

在这里也提一下Netron框架,这个框架代码我看了很多遍,很多思路都从这里来,但是太繁琐了,改动起来非常吃力

所以我自己重新写了一遍,大体思路没变,只是走精简路线,以下是我们的工具最终的界面样式,

我打算把每一步都分拆贴出来,做成一个教程。给大家一个参考

 

 

1、新建自定义控件抽象类

1.1 包含一些基本属性,如字体、是否悬停、是否选中、画布

1.2 包含几个抽象方法,绘制控件皮肤、移动、悬停判断、重新绘制

    public abstract class AbstractShape
    {
        [Browsable(false)]
        public Font DefaultFont { get; private set; }

        [Browsable(false)]
        public Pen DefaultPen { get; private set; }

        [Browsable(false)]
        public bool IsHover { get; set; }

        [Browsable(false)]
        public bool IsSelected { get; set; }

        [Browsable(false)]
        public GraphControl Canvas { get; set; }

        public AbstractShape() { }
        public AbstractShape(GraphControl site)
        {
            DefaultFont = new Font("宋体", 10F);
            DefaultPen = new Pen(Brushes.Black, 1F);
            Canvas = site;
            IsHover = false;
            IsSelected = false;
        }

        public abstract void Paint(Graphics g);
        public abstract bool Hover(Point p);
        public abstract void Invalidate();
        public abstract void Move(Point p);
    }

2、绘制一个自定义控件基类

包含一些基本属性及一些共性方法实现

    public class ShapeBase : AbstractShape
    {
        protected Rectangle RectangleBase;

        [Browsable(false)]
        public Brush ShapeBrush { get; protected set; }

        [Browsable(true), Description("Width"), Category("Layout")]
        public int Width
        {
            get { return this.RectangleBase.Width; }
            set { Resize(value, this.Height); }
        }

        [Browsable(true), Description("Height"), Category("Layout")]
        public int Height
        {
            get { return this.RectangleBase.Height; }
            set { Resize(this.Width, value); }
        }

        [Browsable(true), Description("X"), Category("Layout")]
        public int X
        {
            get { return RectangleBase.X; }
            set
            {
                Point p = new Point(value - RectangleBase.X, RectangleBase.Y);
                this.Move(p);
                Canvas.Invalidate();
            }
        }

        [Browsable(true), Description("Y"), Category("Layout")]
        public int Y
        {
            get { return RectangleBase.Y; }
            set
            {
                Point p = new Point(RectangleBase.X, value - RectangleBase.Y);
                this.Move(p);
                Canvas.Invalidate();
            }
        }

        [Browsable(true), Description("Text"), Category("Layout")]
        public string Text { get;  set; }

        public ShapeBase(GraphControl site)
            : base(site)
        {
            Init();
        }

        private void Init()
        {
            RectangleBase = new Rectangle(0, 0, 100, 70);
            ShapeBrush = new SolidBrush(Color.SteelBlue);
        }

        public override void Paint(Graphics g)
        {
            return;
        }

        public override bool Hover(Point p)
        {
            return false;
        }

        public override void Invalidate()
        {
            Canvas.Invalidate(RectangleBase);
        }

        public override void Move(Point p)
        {
            this.RectangleBase.X += p.X;
            this.RectangleBase.Y += p.Y;
        }

        public virtual void Resize(int width, int height)
        {
            this.RectangleBase.Height = height;
            this.RectangleBase.Width = width;
        }
    }

3、新建一个简单的矩形类

    public class LjrRectangle : ShapeBase
    {
        public LjrRectangle(GraphControl s)
            : base(s)
        { }

        public override void Paint(Graphics g)
        {
            g.FillRectangle(base.ShapeBrush, base.RectangleBase);
            if (base.IsHover || base.IsSelected)
            {
                g.DrawRectangle(new Pen(Color.Red, 2F), base.RectangleBase);
            }
            else
            {
                g.DrawRectangle(base.DefaultPen, base.RectangleBase);
            }
        }
    } 

4、新建画布GraphControl

所以自定义图形控件都将在这个画布里绘制、移动等操作

    public class GraphControl : ScrollableControl
    {
        /// <summary>属性控件绑定事件</summary>
        public delegate void ShowProperty(object ent);

        /// <summary>属性控件绑定事件</summary>
        public event ShowProperty OnShowProperty;

        /// <summary>当前悬停在哪个对象上边</summary>
        protected AbstractShape hoveredObject;

        /// <summary>当前选中的对象</summary>
        protected AbstractShape selectedObject;

        /// <summary>是否正在拖动</summary>
        protected bool draging = false;

        /// <summary>图形对象集合</summary>
        public List<ShapeBase> Shapes { get; set; }

        public GraphControl()
        {
            Shapes = new List<ShapeBase>();
        }

        protected override void OnPaintBackground(PaintEventArgs e)
        {
            base.OnPaintBackground(e);

            Graphics g = e.Graphics;
            Size gridSize = new Size(10, 10);
            ControlPaint.DrawGrid(g, this.ClientRectangle, gridSize, this.BackColor);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

            for (int k = 0; k < Shapes.Count; k++)
            {
                Shapes[k].Paint(g);
            }
        }

        public ShapeBase AddShape(ShapeBase shape)
        {
            Shapes.Add(shape);
            shape.Canvas = this;
            this.Invalidate();
            return shape;
        }
    }

5、新建测试项目

5.1 新建demo.cs把控件拖入界面左边

5.2 再拖一个PropertyGrid用来显示属性值

5.3 Demo.cs代码如下

        private void Demo_Load(object sender, EventArgs e)
        {
            var shape = new LjrRectangle(graphControl1);
            shape.Location = new Point(100, 300);
            shape.Text = "图形化控件";
            this.graphControl1.AddShape(shape);
            this.graphControl1.OnShowProperty += graphControl1_OnShowProps;
        }

        private void graphControl1_OnShowProps(object ent)
        {
            this.propertyGrid1.SelectedObject = ent;
        }

6、运行程序

 

 

阅读目录

  • 图形化控件开发 - 矩形控件
  • 图形化控件开发 - 控件移动
  • 图形化控件开发 - 直线连线
  • 图形化控件开发 - 折线连线
  • 图形化控件开发 - 放大缩小
  • 图形化控件开发 - 待定
posted @ 2017-10-21 13:29  漂亮的猫  阅读(2127)  评论(6编辑  收藏  举报