winform 自定义控件-按钮
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winform 自定义按钮的实现
按钮效果图如下所示。
通过颜色渐变渲染，让控件产生立体效果，上述的按钮就是通过线性渐变画刷二次渐变填充出来的。
详看代码，后面有时间再加入类似win7计算器的淡入淡出效果。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
namespace RogerBar
{
[ToolboxItem(true)]
public partial class BottonEx : Button
{
#region Constructor
public BottonEx()
{
SetStyle(ControlStyles.SupportsTransparentBackColor, true);
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.ResizeRedraw, true);
SetStyle(ControlStyles.UserPaint, true);
this.BackColor = Color.Transparent;
this.FlatAppearance.BorderSize = 0;
this.FlatStyle = FlatStyle.Flat;
InitializeComponent();
}
#endregion
#region Private
//按钮状态
enum ButtonState
{
//正常
Normal,
//鼠标进入
Hover,
//鼠标按下
Pressed
};
private ButtonState State = ButtonState.Normal;
#endregion
#region 属性
#region 颜色表
[TypeConverter(typeof(ExpandableObjectConverter))]
public class RenderColorTable
{
public Color TopStart { set; get; }
public Color TopEnd { set; get; }
public float Scale { set; get; }
public Color BottomStart { set; get; }
public Color BottomEnd { set; get; }
public Color BorderColor { set; get; }
public RenderColorTable(
Color topStart, Color topEnd,
Color bottomStart, Color bottomEnd,
Color borderColor, float scale
)
{
TopStart = topStart;
TopEnd = topEnd;
Scale = scale;
BottomStart = bottomStart;
BottomEnd = bottomEnd;
BorderColor = borderColor;
}
public RenderColorTable() { }
};
private RenderColorTable normalColorTable
= new RenderColorTable(
Color.FromArgb(227, 239, 255),
Color.FromArgb(193, 219, 255),
Color.FromArgb(179, 212, 255),
Color.FromArgb(192, 219, 255),
Color.FromArgb(119, 147, 185),
0.3f
);
[Category("Appearance")]
public RenderColorTable NomalColorTable
{
get
{
return normalColorTable;
}
set
{
normalColorTable = value;
if (normalColorTable.Scale > 1f)
normalColorTable.Scale = 1f;
if (normalColorTable.Scale < 0f)
normalColorTable.Scale = 0f;
base.Invalidate();
}
}
private RenderColorTable highlightColorTable
= new RenderColorTable
(
Color.FromArgb(255, 244, 233),
Color.FromArgb(254, 226, 194),
Color.FromArgb(255, 207, 105),
Color.FromArgb(255, 249, 190),
Color.FromArgb(255, 219, 0),
0.3f
);
[Category("Appearance")]
public RenderColorTable HighlightColorTable
{
set
{
highlightColorTable = value;
base.Invalidate();
}
get
{
return highlightColorTable;
}
}
private RenderColorTable clickColorTable
= new RenderColorTable(
Color.FromArgb(255, 186, 108),
Color.FromArgb(253, 165, 101),
Color.FromArgb(251, 143, 66),
Color.FromArgb(255, 194, 109),
Color.FromArgb(148, 163, 194),
0.3f
);
[Category("Appearance")]
public RenderColorTable ClickColorTable
{
set
{
clickColorTable = value;
base.Invalidate();
}
get
{
return clickColorTable;
}
}
#endregion
#region 外形
private float cornerRadius = 2f;
[Category("Appearance")]
public float CornerRadius //圆角矩形的角度
{
get
{
return cornerRadius;
}
set
{
cornerRadius = value;
this.Invalidate();
}
}
#endregion
#endregion
#region Mouse Event
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (e.Button != MouseButtons.Left) return;
State = ClientRectangle.Contains(e.Location) ? ButtonState.Hover : ButtonState.Normal;
this.Invalidate();
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button != MouseButtons.Left) return;
State = ButtonState.Pressed;
this.Invalidate();
}
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
State = ButtonState.Hover;
this.Invalidate();
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
State = ButtonState.Normal;
this.Invalidate();
}
#endregion
#region Render
private Pen GetBorderPen()
{
if (!Enabled)
{
return new Pen(Color.FromArgb(119, 147, 185));
}
else
{
if (State == ButtonState.Pressed)
{
return new Pen(clickColorTable.BorderColor);
}
else if (State == ButtonState.Hover)
{
return new Pen(highlightColorTable.BorderColor);
}
else //(State == ButtonState.Normal)
{
return new Pen(normalColorTable.BorderColor);
}
}
}
//获取渲染颜色表
private ColorBlend GetColorBlend()
{
ColorBlend colorBlend = new ColorBlend();
if (!Enabled) //禁用状态下的颜色表
{
colorBlend.Colors = new Color[]
{
Color.FromArgb(232,241,252),
Color.FromArgb(229,239,251),
Color.FromArgb(215,229,246),
Color.FromArgb(234,243,253)
};
colorBlend.Positions = new float[] { 0f, 0.3f, 0.35f, 1f };
}
else
{
if (State == ButtonState.Pressed)
{
colorBlend.Colors = new Color[]
{
clickColorTable.TopStart,
clickColorTable.TopEnd,
clickColorTable.BottomStart,
clickColorTable.BottomEnd
};
colorBlend.Positions = new float[]
{
0f,
clickColorTable.Scale,
clickColorTable.Scale+0.05f,
1f
};
}
else if (State == ButtonState.Hover)
{
colorBlend.Colors = new Color[]
{
highlightColorTable.TopStart,
highlightColorTable.TopEnd,
highlightColorTable.BottomStart,
highlightColorTable.BottomEnd
};
colorBlend.Positions = new float[]
{
0f,
highlightColorTable.Scale,
highlightColorTable.Scale,
1f
};
}
else //正常状态
{
colorBlend.Colors = new Color[]
{
normalColorTable.TopStart,
normalColorTable.TopEnd,
normalColorTable.BottomStart,
normalColorTable.BottomEnd
};
colorBlend.Positions = new float[]
{
0f,
normalColorTable.Scale,
normalColorTable.Scale,
1f
};
}
}
return colorBlend;
}
/// <summary>
/// 圆角矩形
/// </summary>
/// <param name="rect">矩形</param>
/// <param name="radius">圆角半径</param>
/// <returns></returns>
private GraphicsPath RoundRectangle(RectangleF rect, float radius)
{
GraphicsPath gp = new GraphicsPath();
float diameter = radius * 2f;
gp.AddArc(rect.X + rect.Width - diameter, rect.Y, diameter, diameter, 270, 90);
gp.AddArc(rect.X + rect.Width - diameter, rect.Y + rect.Height - diameter, diameter, diameter, 0, 90);
gp.AddArc(rect.X, rect.Y + rect.Height - diameter, diameter, diameter, 90, 90);
gp.AddArc(rect.X, rect.Y, diameter, diameter, 180, 90);
gp.CloseFigure();
return gp;
}
private void RenderBorder(Graphics g, Rectangle rect)
{
using (Pen pen = GetBorderPen())
{
Rectangle r = new Rectangle(rect.X, rect.Y, rect.Width - 1, rect.Height - 1);
g.DrawPath(pen, RoundRectangle(r, cornerRadius));
}
}
private void RenderCenter(Graphics g, Rectangle rect)
{
//线性渐变画刷
LinearGradientBrush gb = new LinearGradientBrush(
rect,
Color.Black,
Color.White,
LinearGradientMode.Vertical);
gb.InterpolationColors = GetColorBlend();//设置多色线性渐变表
SolidBrush sb = new SolidBrush(this.BackColor);
g.FillPath(gb, RoundRectangle(rect, cornerRadius));
gb.Dispose();
}
#endregion
#region 文本与图像的绘制
protected virtual void DrawImage(Graphics g)
{
if (Image != null)
{
RectangleF imageRect = RogerBar.DrawingHelper.GetAlignPlacement(this.ImageAlign, this.ClientRectangle, Image.Size);
g.DrawImage(Image, imageRect);
}
}
protected virtual void DrawText(Graphics g)
{
g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
StringFormat format = new StringFormat();
SizeF size = g.MeasureString(Text, Font, new SizeF(this.Width, this.Height), format);
RectangleF textRect = DrawingHelper.GetAlignPlacement(TextAlign, this.ClientRectangle, size);
SolidBrush sb = new SolidBrush(this.ForeColor);
if (!Enabled) sb.Color = Color.FromArgb(141, 141, 141);
g.DrawString(Text, Font, sb, textRect, format);
sb.Dispose();
}
#endregion
#region Override
protected override void OnPaint(PaintEventArgs pevent)
{
Graphics g = pevent.Graphics;
/* BufferedGraphicsContext currentContext = BufferedGraphicsManager.Current;
BufferedGraphics buffer = currentContext.Allocate(pevent.Graphics, pevent.ClipRectangle);
Graphics g = buffer.Graphics;*/
//base.OnPaint(pevent);
g.SmoothingMode = SmoothingMode.AntiAlias;
RenderCenter(g, this.ClientRectangle);
RenderBorder(g, this.ClientRectangle);
DrawImage(g);
DrawText(g);
/*buffer.Render(pevent.Graphics); //呈现图像至关联的Graphics
buffer.Dispose();
g.Dispose();*/
}
#endregion
}
}
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