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FlatStyle按钮自己做 和C或VB比起来，使用C#写自定义控件，特别是从零开始写自定义控件，不知简化了多少倍，没有复杂而晦涩的消息映射，思路就像写应用程序一样如行云流水，一路畅通。学过delphi的人都知道有一套FlatStyle控件，平面式的简约风格给用户带来了良好的视觉效果。但是看看他的源码，如果没有一定的Windows底层功底，看起来可不是件容易的事。现在好了，有了C#这个异常强大的工具，我们就可以轻轻松松的写一个自己的FlatStyle控件了。 本文以平面按钮为例，写一个按钮颜色和边框颜色能任意更改的自定义按钮控件，希望能起到抛砖引玉的作用。 如果我们只是改变已有的控件的外观（如本例），那么最好继承原有的控件。如：public class ButtonLzh : System.Windows.Forms.Button 定义一个枚举类型，用来描述鼠标的状态： protected enum Status { MouseEnter, MouseLeave, MouseDown, MouseUp } 写一个画文字的函数： protected void DrawString(string strText,Graphics g) { StringFormat sf=new StringFormat(); sf.LineAlignment=StringAlignment.Center; sf.Alignment=StringAlignment.Center; g.DrawString(strText,this.Font,new SolidBrush(Color.Blue),this.ClientRectangle,sf); } 填充按钮颜色及画边框颜色： protected void DrawBorder(Status status,Graphics g) { Pen[] MousePen=new Pen[4];//定义四支笔 MousePen[(int)Status.MouseDown]=new Pen(_MouseDownBorderColor,2); MousePen[(int)Status.MouseEnter]=new Pen(_MouseEnterBorderColor,2); MousePen[(int)Status.MouseLeave]=new Pen(_MouseLeaveBorderColor,2); MousePen[(int)Status.MouseUp]=new Pen(_MouseUpBorderColor,2); SolidBrush[] MouseBrush=new SolidBrush[4];//定义四个笔刷 MouseBrush[(int)Status.MouseDown]=new SolidBrush(_MouseDownColor); MouseBrush[(int)Status.MouseEnter]=new SolidBrush(_MouseEnterColor); MouseBrush[(int)Status.MouseLeave]=new SolidBrush(_MouseLeaveColor); MouseBrush[(int)Status.MouseUp]=new SolidBrush(_MouseUpColor); switch(status) { case Status.MouseDown: g.FillRectangle(MouseBrush[(int)Status.MouseDown],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseDown],this.ClientRectangle); break; case Status.MouseEnter: g.FillRectangle(MouseBrush[(int)Status.MouseEnter],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseEnter],this.ClientRectangle); break; case Status.MouseLeave: g.FillRectangle(MouseBrush[(int)Status.MouseLeave],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseLeave],this.ClientRectangle); break; case Status.MouseUp: g.FillRectangle(MouseBrush[(int)Status.MouseUp],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseUp],this.ClientRectangle); break; } for(int i=0;i<4;i++) { MousePen[i].Dispose(); MouseBrush[i].Dispose(); } }重载OnPaint()事件： protected override void OnPaint(PaintEventArgs e) { base.OnPaint (e); Graphics g=e.Graphics; switch(MouseStatus) { case Status.MouseDown: this.DrawBorder(Status.MouseDown,g); this.DrawString(this.Text,g); break; case Status.MouseEnter: this.DrawBorder(Status.MouseEnter,g); this.DrawString(this.Text,g); break; case Status.MouseLeave: this.DrawBorder(Status.MouseLeave,g); this.DrawString(this.Text,g); break; case Status.MouseUp: this.DrawBorder(Status.MouseUp,g); this.DrawString(this.Text,g); break; } }基本的函数就是这样了，无外乎就是画边框，然后填充颜色。当我们重载了OnPaint()事件后，也就等于把按钮的外观绘制权交到了自己的手里，你想怎么画就怎么画啦。以下是程序的所有源码，新建一个Windows控件库，把代码复制过去就OK！using System;using System.Collections;using System.ComponentModel;using System.Drawing;using System.Data;using System.Windows.Forms;namespace LzhButton{ /// /// UserControl1 的摘要说明。 /// public class ButtonLzh : System.Windows.Forms.Button { private Color _MouseEnterColor; private Color _MouseLeaveColor; private Color _MouseDownColor; private Color _MouseUpColor; private Color _MouseEnterBorderColor; private Color _MouseLeaveBorderColor; private Color _MouseDownBorderColor; private Color _MouseUpBorderColor; private Status MouseStatus; [Description("鼠标进入控件内的颜色"),Category("Appearance")] public Color MouseEnterColor { get { return _MouseEnterColor; } set { _MouseEnterColor=value; } } [Description("鼠标移出控件外的颜色"),Category("Appearance")] public Color MouseLeaveColor { get { return _MouseLeaveColor; } set { _MouseLeaveColor=value; } } [Description("鼠标按下时按钮的颜色"),Category("Appearance")] public Color MouseDownColor { get { return _MouseDownColor; } set { _MouseDownColor=value; } } [Description("鼠标弹起时按钮的颜色"),Category("Appearance")] public Color MouseUpColor { get { return _MouseUpColor; } set { _MouseUpColor=value; } } ///////////////////////////////////////////// [Description("鼠标进入按钮时的边框颜色"),Category("Appearance")] public Color MouseEnterBorderColor { get { return _MouseEnterBorderColor; } set { _MouseEnterBorderColor=value; } } [Description("鼠标移出按钮的边框颜色"),Category("Appearance")] public Color MouseLeaveBorderColor { get { return _MouseLeaveBorderColor; } set { _MouseLeaveBorderColor=value; } } [Description("鼠标按下按钮的边框颜色"),Category("Appearance")] public Color MouseDownBorderColor { get { return _MouseDownBorderColor; } set { _MouseDownBorderColor=value; } } [Description("鼠标弹起时按钮的边框颜色"),Category("Appearance")] public Color MouseUpBorderColor { get { return _MouseUpBorderColor; } set { _MouseUpBorderColor=value; } } /// /// 必需的设计器变量。 /// private System.ComponentModel.Container components = null; public ButtonLzh() { // 该调用是 Windows.Forms 窗体设计器所必需的。 InitializeComponent(); // TODO: 在 InitComponent 调用后添加任何初始化 } /// /// 清理所有正在使用的资源。 /// protected override void Dispose( bool disposing ) { if( disposing ) { if( components != null ) components.Dispose(); } base.Dispose( disposing ); } #region 组件设计器生成的代码 /// /// 设计器支持所需的方法 - 不要使用代码编辑器 /// 修改此方法的内容。 /// private void InitializeComponent() { // // ButtonLzh // this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.ButtonLzh_MouseUp); this.MouseEnter += new System.EventHandler(this.ButtonLzh_MouseEnter); this.MouseLeave += new System.EventHandler(this.ButtonLzh_MouseLeave); this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.ButtonLzh_MouseDown); //初始化 _MouseEnterColor=Color.Yellow; _MouseLeaveColor=Color.Pink; _MouseDownColor=Color.Red; _MouseUpColor=Color.Blue; _MouseEnterBorderColor=Color.GreenYellow; _MouseLeaveBorderColor=Color.DeepPink; _MouseDownBorderColor=Color.PaleVioletRed; _MouseUpBorderColor=Color.CadetBlue; } #endregion protected enum Status { MouseEnter, MouseLeave, MouseDown, MouseUp } /// /// 画文字 /// /// 要画的文字 /// 画布 protected void DrawString(string strText,Graphics g) { StringFormat sf=new StringFormat(); sf.LineAlignment=StringAlignment.Center; sf.Alignment=StringAlignment.Center; g.DrawString(strText,this.Font,new SolidBrush(Color.Blue),this.ClientRectangle,sf); } /// /// 画边框 /// /// 鼠标状态 /// 画布 protected void DrawBorder(Status status,Graphics g) { Pen[] MousePen=new Pen[4];//定义四支笔 MousePen[(int)Status.MouseDown]=new Pen(_MouseDownBorderColor,2); MousePen[(int)Status.MouseEnter]=new Pen(_MouseEnterBorderColor,2); MousePen[(int)Status.MouseLeave]=new Pen(_MouseLeaveBorderColor,2); MousePen[(int)Status.MouseUp]=new Pen(_MouseUpBorderColor,2); SolidBrush[] MouseBrush=new SolidBrush[4];//定义四个笔刷 MouseBrush[(int)Status.MouseDown]=new SolidBrush(_MouseDownColor); MouseBrush[(int)Status.MouseEnter]=new SolidBrush(_MouseEnterColor); MouseBrush[(int)Status.MouseLeave]=new SolidBrush(_MouseLeaveColor); MouseBrush[(int)Status.MouseUp]=new SolidBrush(_MouseUpColor); switch(status) { case Status.MouseDown: g.FillRectangle(MouseBrush[(int)Status.MouseDown],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseDown],this.ClientRectangle); break; case Status.MouseEnter: g.FillRectangle(MouseBrush[(int)Status.MouseEnter],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseEnter],this.ClientRectangle); break; case Status.MouseLeave: g.FillRectangle(MouseBrush[(int)Status.MouseLeave],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseLeave],this.ClientRectangle); break; case Status.MouseUp: g.FillRectangle(MouseBrush[(int)Status.MouseUp],this.ClientRectangle); g.DrawRectangle(MousePen[(int)Status.MouseUp],this.ClientRectangle); break; } for(int i=0;i<4;i++) { MousePen[i].Dispose(); MouseBrush[i].Dispose(); } } /// /// 重载OnPaint事件 /// /// protected override void OnPaint(PaintEventArgs e) { base.OnPaint (e); Graphics g=e.Graphics; switch(MouseStatus) { case Status.MouseDown: this.DrawBorder(Status.MouseDown,g); this.DrawString(this.Text,g); break; case Status.MouseEnter: this.DrawBorder(Status.MouseEnter,g); this.DrawString(this.Text,g); break; case Status.MouseLeave: this.DrawBorder(Status.MouseLeave,g); this.DrawString(this.Text,g); break; case Status.MouseUp: this.DrawBorder(Status.MouseUp,g); this.DrawString(this.Text,g); break; } } private void ButtonLzh_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { MouseStatus=Status.MouseDown; this.Invalidate(); } private void ButtonLzh_MouseEnter(object sender, System.EventArgs e) { MouseStatus=Status.MouseEnter ; this.Invalidate(); } private void ButtonLzh_MouseLeave(object sender, System.EventArgs e) { MouseStatus=Status.MouseLeave; this.Invalidate(); } private void ButtonLzh_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e) { MouseStatus=Status.MouseUp; this.Invalidate(); } }}关闭本页

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