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