using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
namespace Test
{
public partial class RoundButton : Button
{
#region --成员变量--
RectangleF rect = new RectangleF();//控件矩形
bool mouseEnter;//鼠标是否进入控件区域的标志
bool buttonPressed;//按钮是否按下
bool buttonClicked;//按钮是否被点击
#endregion
#region --属性--
#region 形状
///
/// 设置或获取圆形按钮的圆的边距离方框边的距离
///
[Browsable(true), DefaultValue(2)]
[Category("Appearance")]
public int DistanceToBorder { get; set; }
#endregion
#region 填充色
///
/// 获取或设置按钮主体颜色
///
///
The color of the focus.
[Browsable(true), DefaultValue(typeof(Color), "DodgerBlue"), Description("按钮主体渐变起始颜色")]
[Category("Appearance")]
public Color ButtonCenterColorEnd { get; set; }
///
/// 获取或设置按钮主体颜色
///
[Browsable(true), DefaultValue(typeof(Color), "CornflowerBlue"), Description("按钮主体渐变终点颜色")]
[Category("Appearance")]
public Color ButtonCenterColorStart { get; set; }
///
/// 获取或设置按钮主体颜色渐变方向
///
[Browsable(true), DefaultValue(90), Description("按钮主体颜色渐变方向,X轴顺时针开始")]
[Category("Appearance")]
public int GradientAngle { get; set; }
///
/// 是否显示中间标志
///
[Browsable(true), DefaultValue(typeof(bool), "true"), Description("是否显示中间标志")]
[Category("Appearance")]
public bool IsShowIcon { get; set; }
///
/// 按钮中间标志填充色
///
[Browsable(true), DefaultValue(typeof(Color), "Black"), Description("按钮中间标志填充色")]
[Category("Appearance")]
public Color IconColor { get; set; }
#endregion
#region 边框
///
/// 获取或设置边框大小
///
[Browsable(true), DefaultValue(4), Description("按钮边框大小")]
[Category("Appearance")]
public int BorderWidth { get; set; }
///
/// 获取或设置按钮边框颜色
///
///
The color of the focus.
[Browsable(true), DefaultValue(typeof(Color), "Black"), Description("按钮边框颜色")]
[Category("Appearance")]
public Color BorderColor { get; set; }
///
/// 获取或设置边框透明度
///
[Browsable(true), DefaultValue(200), Description("设置边框透明度:0-255")]
[Category("Appearance")]
public int BorderTransparent { get; set; }
///
/// 获取或设置按钮获取焦点后边框颜色
///
///
The color of the focus.
[Browsable(true), DefaultValue(typeof(Color), "Orange"), Description("按钮获得焦点后的边框颜色")]
[Category("Appearance")]
public Color FocusBorderColor { get; set; }
#endregion
#endregion
#region --构造函数--
///
/// 构造函数
///
public RoundButton()
{
// 控件风格
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.ResizeRedraw, true);
SetStyle(ControlStyles.UserPaint, true);
//初始值设定
this.Height = this.Width = 80;
DistanceToBorder = 4;
ButtonCenterColorStart = Color.CornflowerBlue;
ButtonCenterColorEnd = Color.DodgerBlue;
BorderColor = Color.Black;
FocusBorderColor = Color.Orange;
IconColor = Color.Black;
BorderWidth = 4;
BorderTransparent = 200;
GradientAngle = 90;
mouseEnter = false;
buttonPressed = false;
buttonClicked = false;
IsShowIcon = true;
}
#endregion
#region --重写部分事件--
#region OnPaint事件
///
/// 控件绘制
///
///
protected override void OnPaint(PaintEventArgs pevent)
{
//base.OnPaint(pevent);
base.OnPaintBackground(pevent);
Graphics g = pevent.Graphics;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.AntiAlias;//抗锯齿
myResize();//调整圆形区域
var brush = new LinearGradientBrush(rect, ButtonCenterColorStart, ButtonCenterColorEnd, GradientAngle);
PaintShape(g, brush, rect);//绘制按钮中心区域
DrawBorder(g);//绘制边框
DrawStateIcon(g);//绘制按钮功能标志
if (mouseEnter)
{
DrawHighLight(g);//绘制高亮区域
DrawStateIcon(g);//绘制按钮功能标志
}
}
#endregion
#region 鼠标
///
/// 鼠标点击事件
///
///
protected override void OnMouseClick(MouseEventArgs e)
{
base.OnMouseClick(e);
buttonClicked = !buttonClicked;
}
///
/// Raises the event.
///
///
A
that contains the event data.
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (e.Button != MouseButtons.Left) return;
buttonPressed = false;
base.Invalidate();
}
///
/// Raises the event.
///
///
A
that contains the event data.
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button != MouseButtons.Left) return;
buttonPressed = true;
}
///
/// 鼠标进入按钮
///
///
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
mouseEnter = true;
}
///
/// 鼠标离开控件
///
///
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
mouseEnter = false;
}
#endregion
#endregion
#region --自定义函数--
///
/// 绘制中心区域标志
///
///
private void DrawStateIcon(Graphics g)
{
if (IsShowIcon)
{
if (buttonClicked)
{
GraphicsPath startIconPath = new GraphicsPath();
int W = base.Width / 3;
Point p1 = new Point(W, W);
Point p2 = new Point(2 * W, W);
Point p3 = new Point(2 * W, 2 * W);
Point p4 = new Point(W, 2 * W);
Point[] pts = { p1, p2, p3, p4 };
startIconPath.AddLines(pts);
Brush brush = new SolidBrush(IconColor);
g.FillPath(brush, startIconPath);
}
else
{
GraphicsPath stopIconPath = new GraphicsPath();
int W = base.Width / 4;
Point p1 = new Point(3 *W/2, W);
Point p2 = new Point( W, 3 * W/2);
Point p3 = new Point(2 * W+W/2, 3*W);
Point p4 = new Point(3 * W, 2 * W + W / 2);
Point p8 = new Point(2 * W + W / 2, W);
Point p7 = new Point(3 * W, 3 * W / 2);
Point p5 = new Point(W, 2 * W + W / 2);
Point p6 = new Point(3 * W / 2, 3 * W);
Point[] pts = { p5,p6,p7,p8};
Point[] pts2 = { p1, p2, p3, p4 };
SolidBrush redBrush = new SolidBrush(Color.Red);
stopIconPath.AddLines(pts);
Brush brush = new SolidBrush(IconColor);
g.FillPath(redBrush, stopIconPath);
GraphicsPath stopIconPath2 = new GraphicsPath();
stopIconPath2.AddLines(pts2);
g.FillPath(redBrush, stopIconPath2);
}
}
}
///
/// 重新确定控件大小
///
protected void myResize()
{
int x = DistanceToBorder;
int y = DistanceToBorder;
int width = this.Width - 2 * DistanceToBorder;
int height = this.Height - 2 * DistanceToBorder;
rect = new RectangleF(x, y, width, height);
}
///
/// 绘制高亮效果
///
///
Graphic对象
protected virtual void DrawHighLight(Graphics g)
{
RectangleF highlightRect = rect;
highlightRect.Inflate(-BorderWidth / 2, -BorderWidth / 2);
Brush brush = Brushes.DodgerBlue;
if (buttonPressed)
{
brush = new LinearGradientBrush(rect, ButtonCenterColorStart, ButtonCenterColorEnd, GradientAngle);
}
else
{
brush = new LinearGradientBrush(rect, Color.FromArgb(60, Color.White),
Color.FromArgb(60, Color.White), GradientAngle);
}
PaintShape(g, brush, highlightRect);
}
///
/// 绘制边框
///
///
Graphics对象
protected virtual void DrawBorder(Graphics g)
{
Pen p = new Pen(BorderColor);
if (Focused)
{
p.Color = FocusBorderColor;//外圈获取焦点后的颜色
p.Width = BorderWidth;
PaintShape(g, p, rect);
}
else
{
p.Width = BorderWidth;
PaintShape(g, p, rect);
}
}
///
///
///
///
Graphic对象
protected virtual void DrawPressState(Graphics g)
{
RectangleF pressedRect = rect;
pressedRect.Inflate(-2, -2);
Brush brush = new LinearGradientBrush(rect, Color.FromArgb(60, Color.White),
Color.FromArgb(60, Color.White), GradientAngle);
PaintShape(g, brush, pressedRect);
}
///
/// 绘制图形
///
///
Graphics对象
///
Pen对象
///
RectangleF对象
protected virtual void PaintShape(Graphics g, Pen pen, RectangleF rect)
{
g.DrawEllipse(pen, rect);
}
///
/// 绘制图形
///
///
Graphics对象
///
Brush对象
///
Rectangle对象
protected virtual void PaintShape(Graphics g, Brush brush, RectangleF rect)
{
g.FillEllipse(brush, rect);
}
#endregion
}
}