WinForm"不错的Vista风格水晶按钮"控件使用(附：源码demo) 之配餐系统的开发
做WinForm开发的朋友，应该都有这种感觉：vs自带的控件倒是不少，但美观的却很少 ——于是网上就有一些开源、收费或免费的不错的控件，像皮肤等控件库DotNetBar、饼状图控件pieChart(此控件的使用，可查看之前的一篇文章：WinForm"立体饼状图实现(附源码示例)" 之配餐系统的开发)....，（在之前的几篇介绍配餐系统开发的文章里，我主要是对一些功能的说明）而此文要跟大家分享的是"不错的Vista风格水晶按钮"控件的使用(界面美观性和用户体验的增强)。好了，直接切入正题，先看下此控件的运行效果：
此按钮控件有以下几点值得说明一下：
1.CornerRadius: ——此属性用来设置按钮两端的形状(椭圆或普通)，属性值为数字，0:即普通按钮，>0的值则按钮的椭圆‘弯曲度’更大, 为20时即为上图中 绿色按钮，当值>20后效果就不太好，具体可下载demo后自行查看。
2.按钮的BaseColor和ButtonColor同时设置，其效果类似于 渐变。
此按钮控件 关键代码如下：
/// <summary>
/// Draws the outer border for the control
/// using the ButtonColor property.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawOuterStroke(Graphics g)
{
if ( this .ButtonStyle == Style.Flat && this .mButtonState == State.None){ return ;}
Rectangle r = this .ClientRectangle;
r.Width -= 1 ; r.Height -= 1 ;
using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius))
{
using (Pen p = new Pen( this .ButtonColor))
{
g.DrawPath(p, rr);
}
}
}
/// <summary>
/// Draws the inner border for the control
/// using the HighlightColor property.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawInnerStroke(Graphics g)
{
if ( this .ButtonStyle == Style.Flat && this .mButtonState == State.None){ return ;}
Rectangle r = this .ClientRectangle;
r.X ++ ; r.Y ++ ;
r.Width -= 3 ; r.Height -= 3 ;
using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius))
{
using (Pen p = new Pen( this .HighlightColor))
{
g.DrawPath(p, rr);
}
}
}
/// <summary>
/// Draws the background for the control
/// using the background image and the
/// BaseColor.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawBackground(Graphics g)
{
if ( this .ButtonStyle == Style.Flat && this .mButtonState == State.None){ return ;}
int alpha = (mButtonState == State.Pressed) ? 204 : 127 ;
Rectangle r = this .ClientRectangle;
r.Width -- ; r.Height -- ;
using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius))
{
using (SolidBrush sb = new SolidBrush( this .BaseColor))
{
g.FillPath(sb, rr);
}
SetClip(g);
if ( this .BackImage != null ){g.DrawImage( this .BackImage, this .ClientRectangle);}
g.ResetClip();
using (SolidBrush sb = new SolidBrush(Color.FromArgb(alpha, this .ButtonColor)))
{
g.FillPath(sb, rr);
}
}
}
/// <summary>
/// Draws the Highlight over the top of the
/// control using the HightlightColor.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawHighlight(Graphics g)
{
if ( this .ButtonStyle == Style.Flat && this .mButtonState == State.None){ return ;}
int alpha = (mButtonState == State.Pressed) ? 60 : 150 ;
Rectangle rect = new Rectangle( 0 , 0 , this .Width, this .Height / 2 );
using (GraphicsPath r = RoundRect(rect, CornerRadius, CornerRadius, 0 , 0 ))
{
using (LinearGradientBrush lg = new LinearGradientBrush(r.GetBounds(),
Color.FromArgb(alpha, this .HighlightColor),
Color.FromArgb(alpha / 3 , this .HighlightColor),
LinearGradientMode.Vertical))
{
g.FillPath(lg, r);
}
}
}
/// <summary>
/// Draws the glow for the button when the
/// mouse is inside the client area using
/// the GlowColor property.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawGlow(Graphics g)
{
if ( this .mButtonState == State.Pressed){ return ;}
SetClip(g);
using (GraphicsPath glow = new GraphicsPath())
{
glow.AddEllipse( - 5 , this .Height / 2 - 10 , this .Width + 11 , this .Height + 11 );
using (PathGradientBrush gl = new PathGradientBrush(glow))
{
gl.CenterColor = Color.FromArgb(mGlowAlpha, this .GlowColor);
gl.SurroundColors = new Color[] {Color.FromArgb( 0 , this .GlowColor)};
g.FillPath(gl, glow);
}
}
g.ResetClip();
}
/// <summary>
/// Draws the text for the button.
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawText(Graphics g)
{
StringFormat sf = StringFormatAlignment( this .TextAlign);
Rectangle r = new Rectangle( 8 , 8 , this .Width - 17 , this .Height - 17 );
g.DrawString( this .ButtonText, this .Font, new SolidBrush( this .ForeColor),r,sf);
}
/// <summary>
/// Draws the image for the button
/// </summary>
/// <param name="g"> The graphics object used in the paint event. </param>
private void DrawImage(Graphics g)
{
if ( this .Image == null ) { return ;}
Rectangle r = new Rectangle( 8 , 8 , this .ImageSize.Width, this .ImageSize.Height);
switch ( this .ImageAlign)
{
case ContentAlignment.TopCenter:
r = new Rectangle( this .Width / 2 - this .ImageSize.Width / 2 , 8 , this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.TopRight:
r = new Rectangle( this .Width - 8 - this .ImageSize.Width, 8 , this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.MiddleLeft:
r = new Rectangle( 8 , this .Height / 2 - this .ImageSize.Height / 2 , this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.MiddleCenter:
r = new Rectangle( this .Width / 2 - this .ImageSize.Width / 2 , this .Height / 2 - this .ImageSize.Height / 2 , this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.MiddleRight:
r = new Rectangle( this .Width - 8 - this .ImageSize.Width, this .Height / 2 - this .ImageSize.Height / 2 , this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.BottomLeft:
r = new Rectangle( 8 , this .Height - 8 - this .ImageSize.Height, this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.BottomCenter:
r = new Rectangle( this .Width / 2 - this .ImageSize.Width / 2 , this .Height - 8 - this .ImageSize.Height, this .ImageSize.Width, this .ImageSize.Height);
break ;
case ContentAlignment.BottomRight:
r = new Rectangle( this .Width - 8 - this .ImageSize.Width, this .Height - 8 - this .ImageSize.Height, this .ImageSize.Width, this .ImageSize.Height);
break ;
}
g.DrawImage( this .Image,r);
}
private void SetClip(Graphics g)
{
Rectangle r = this .ClientRectangle;
r.X ++ ; r.Y ++ ; r.Width -= 3 ; r.Height -= 3 ;
using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius))
{
g.SetClip(rr);
}
}