实例介绍
【实例简介】C#中按钮控件优化和美化:圆角功能,鼠标进入与离开的颜色设置功能及不使能时的显示颜色,图片显示
【实例截图】

【核心代码】protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
base.OnPaintBackground(e);
Graphics g = e.Graphics;
Rectangle imageRect;//图像区域
Rectangle textRect;//文字区域
this.CalculateRect(out imageRect, out textRect);
g.SmoothingMode = SmoothingMode.AntiAlias;
Color baseColor;
Color borderColor;
Color innerBorderColor = Color.Gold;
if (Enabled)
{
baseColor = BaseColor;
borderColor = BaseColor;
}
else
{
baseColor = SystemColors.ControlDark;
borderColor = SystemColors.ControlDark;
}
this.RenderBackgroundInternal(
g,
ClientRectangle,
baseColor,
borderColor,
innerBorderColor,
RoundStyle,
Radius,
0.35f,
true,
false,
LinearGradientMode.Vertical);
if (Image != null)
{
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImage(Image, imageRect, 0, 0, Image.Width, Image.Height, GraphicsUnit.Pixel);
}
TextRenderer.DrawText(g, Text, Font, textRect, ForeColor, GetTextFormatFlags(TextAlign, RightToLeft == RightToLeft.Yes));
}
private void CalculateRect(out Rectangle imageRect, out Rectangle textRect)
{
imageRect = Rectangle.Empty;
textRect = Rectangle.Empty;
if (Image == null)
{
textRect = new Rectangle(
2,
0,
Width - 4,
Height);
return;
}
switch (TextImageRelation)
{
case TextImageRelation.Overlay:
imageRect = new Rectangle(
2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
0,
Width - 4,
Height);
break;
case TextImageRelation.ImageAboveText:
imageRect = new Rectangle(
(Width - ImageWidth) / 2,
2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
imageRect.Bottom,
Width,
Height - imageRect.Bottom - 2);
break;
case TextImageRelation.ImageBeforeText:
imageRect = new Rectangle(
2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
imageRect.Right 2,
0,
Width - imageRect.Right - 4,
Height);
break;
case TextImageRelation.TextAboveImage:
imageRect = new Rectangle(
(Width - ImageWidth) / 2,
Height - ImageWidth - 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
0,
2,
Width,
Height - imageRect.Y - 2);
break;
case TextImageRelation.TextBeforeImage:
imageRect = new Rectangle(
Width - ImageWidth - 2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
0,
imageRect.X - 2,
Height);
break;
}
if (RightToLeft == RightToLeft.Yes)
{
imageRect.X = Width - imageRect.Right;
textRect.X = Width - textRect.Right;
}
}
public MyButton()
{
this.FlatStyle = System.Windows.Forms.FlatStyle.Flat; //设置按钮默认样式
this.BackColor = Color.White; //设置按钮默认背景颜色
this.FlatAppearance.BorderSize = 0; //设置边框默认边框值
this.ForeColor = Color.White; //设置字体颜色
this.Size = new System.Drawing.Size(76, 33); //设置默认按钮大小
InitializeComponent();
}
/// <summary>
/// 声明自绘,优化闪烁
/// </summary>
private void SetStyle()
{
base.SetStyle(
ControlStyles.UserPaint | //用户自定义绘制
ControlStyles.OptimizedDoubleBuffer | //设置双缓冲减少闪烁
ControlStyles.AllPaintingInWmPaint | //空间忽略windows消息减少闪烁
ControlStyles.ResizeRedraw | //调整大小重绘
ControlStyles.SupportsTransparentBackColor, true);//模拟透明
base.UpdateStyles();
}
/// <summary>
/// 得到焦点时按钮背景色
/// </summary>
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
this.BaseColor = HoverColor;//背景色
base.ForeColor = HoverTextColor;//前景色
}
/// <summary>
/// 失去焦点时按钮背景及字体色
/// </summary>
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
this.BaseColor = LeaveColor;
base.ForeColor = LeaveTextColor;
}
【实例截图】


【核心代码】protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
base.OnPaintBackground(e);
Graphics g = e.Graphics;
Rectangle imageRect;//图像区域
Rectangle textRect;//文字区域
this.CalculateRect(out imageRect, out textRect);
g.SmoothingMode = SmoothingMode.AntiAlias;
Color baseColor;
Color borderColor;
Color innerBorderColor = Color.Gold;
if (Enabled)
{
baseColor = BaseColor;
borderColor = BaseColor;
}
else
{
baseColor = SystemColors.ControlDark;
borderColor = SystemColors.ControlDark;
}
this.RenderBackgroundInternal(
g,
ClientRectangle,
baseColor,
borderColor,
innerBorderColor,
RoundStyle,
Radius,
0.35f,
true,
false,
LinearGradientMode.Vertical);
if (Image != null)
{
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.DrawImage(Image, imageRect, 0, 0, Image.Width, Image.Height, GraphicsUnit.Pixel);
}
TextRenderer.DrawText(g, Text, Font, textRect, ForeColor, GetTextFormatFlags(TextAlign, RightToLeft == RightToLeft.Yes));
}
private void CalculateRect(out Rectangle imageRect, out Rectangle textRect)
{
imageRect = Rectangle.Empty;
textRect = Rectangle.Empty;
if (Image == null)
{
textRect = new Rectangle(
2,
0,
Width - 4,
Height);
return;
}
switch (TextImageRelation)
{
case TextImageRelation.Overlay:
imageRect = new Rectangle(
2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
0,
Width - 4,
Height);
break;
case TextImageRelation.ImageAboveText:
imageRect = new Rectangle(
(Width - ImageWidth) / 2,
2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
imageRect.Bottom,
Width,
Height - imageRect.Bottom - 2);
break;
case TextImageRelation.ImageBeforeText:
imageRect = new Rectangle(
2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
imageRect.Right 2,
0,
Width - imageRect.Right - 4,
Height);
break;
case TextImageRelation.TextAboveImage:
imageRect = new Rectangle(
(Width - ImageWidth) / 2,
Height - ImageWidth - 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
0,
2,
Width,
Height - imageRect.Y - 2);
break;
case TextImageRelation.TextBeforeImage:
imageRect = new Rectangle(
Width - ImageWidth - 2,
(Height - ImageWidth) / 2,
ImageWidth,
ImageWidth);
textRect = new Rectangle(
2,
0,
imageRect.X - 2,
Height);
break;
}
if (RightToLeft == RightToLeft.Yes)
{
imageRect.X = Width - imageRect.Right;
textRect.X = Width - textRect.Right;
}
}
public MyButton()
{
this.FlatStyle = System.Windows.Forms.FlatStyle.Flat; //设置按钮默认样式
this.BackColor = Color.White; //设置按钮默认背景颜色
this.FlatAppearance.BorderSize = 0; //设置边框默认边框值
this.ForeColor = Color.White; //设置字体颜色
this.Size = new System.Drawing.Size(76, 33); //设置默认按钮大小
InitializeComponent();
}
/// <summary>
/// 声明自绘,优化闪烁
/// </summary>
private void SetStyle()
{
base.SetStyle(
ControlStyles.UserPaint | //用户自定义绘制
ControlStyles.OptimizedDoubleBuffer | //设置双缓冲减少闪烁
ControlStyles.AllPaintingInWmPaint | //空间忽略windows消息减少闪烁
ControlStyles.ResizeRedraw | //调整大小重绘
ControlStyles.SupportsTransparentBackColor, true);//模拟透明
base.UpdateStyles();
}
/// <summary>
/// 得到焦点时按钮背景色
/// </summary>
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
this.BaseColor = HoverColor;//背景色
base.ForeColor = HoverTextColor;//前景色
}
/// <summary>
/// 失去焦点时按钮背景及字体色
/// </summary>
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
this.BaseColor = LeaveColor;
base.ForeColor = LeaveTextColor;
}
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