带颜色和形状的自定义按钮

• 下载演示程序 - 7.51 Kb
• 下载源代码 - 11.1 Kb

引言

这是我的第一个 C# 自定义控件。请下载演示程序并点击一下。

特点

用户可以定义

• Color
  • 边框颜色
  • 正常颜色 A
  • 正常颜色 B
  • 悬停颜色 A
  • 悬停颜色 B
• 渐变样式
  • Horizontal
  • 垂直
  • 前向对角线
  • 后向对角线
• 按钮样式
  • 矩形
  • 椭圆
• 平滑质量
  • 无(清晰)
  • 高速
  • 抗锯齿
  • 高质量

你实际上可以感受到它的点击，因为它具有扁平的样式！

OnPaint() 中使用的关键技术

SmoothingMode

//
// set SmoothingMode
//
switch (_SmoothingQuality)
{
    case SmoothingQualities.None:
        e.Graphics.SmoothingMode = SmoothingMode.Default;
        break;
    case SmoothingQualities.HighSpeed:
        e.Graphics.SmoothingMode = SmoothingMode.HighSpeed;
        break;
    case SmoothingQualities.AntiAlias:
        e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
        break;
    case SmoothingQualities.HighQuality:
        e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
        break;
}

LinearGradientMode

//
// mode declaration
//
LinearGradientMode mode;

//
// set LinearGradientMode
//
switch (_GradientStyle)
{
    case GradientStyles.Horizontal:
        mode = LinearGradientMode.Horizontal;
        break;
    case GradientStyles.Vertical:
        mode = LinearGradientMode.Vertical;
        break;
    case GradientStyles.ForwardDiagonal:
        mode = LinearGradientMode.ForwardDiagonal;
        break;
    case GradientStyles.BackwardDiagonal:
        mode = LinearGradientMode.BackwardDiagonal;
        break;
    default:
        mode = LinearGradientMode.Vertical;
        break;
}

LinearGradientBrush

//
// brush declaration
//
LinearGradientBrush brush;

switch (_State)
{
    case _States.Normal:
        brush = new LinearGradientBrush(newRect, 
                _NormalColorA, _NormalColorB, mode);
        switch (_ButtonStyle)
        {
            case ButtonStyles.Rectangle:
                e.Graphics.FillRectangle(brush, newRect);
                e.Graphics.DrawRectangle(new 
                    Pen(_NormalBorderColor, 1), newRect);
                break;
            case ButtonStyles.Ellipse:
                e.Graphics.FillEllipse(brush, newRect);
                e.Graphics.DrawEllipse(new 
                  Pen(_NormalBorderColor, 1), newRect);
                break;

        }
        e.Graphics.DrawString(this.Text, base.Font, 
           new SolidBrush(base.ForeColor), textX, textY);
        break;

    case _States.MouseOver:
        brush = new LinearGradientBrush(newRect, 
              _HoverColorA, _HoverColorB, mode);
        switch (_ButtonStyle)
        {
            case ButtonStyles.Rectangle:
                e.Graphics.FillRectangle(brush, newRect);
                e.Graphics.DrawRectangle(new 
                     Pen(_HoverBorderColor, 1), newRect);
                break;
            case ButtonStyles.Ellipse:
                e.Graphics.FillEllipse(brush, newRect);
                e.Graphics.DrawEllipse(new 
                   Pen(_HoverBorderColor, 1), newRect);
                break;

        }
        e.Graphics.DrawString(this.Text, base.Font, 
          new SolidBrush(base.ForeColor), textX, textY);
        break;

    case _States.Clicked:
        brush = new LinearGradientBrush(newRect, 
              _HoverColorA, _HoverColorB, mode);
        switch (_ButtonStyle)
        {
            case ButtonStyles.Rectangle:
                e.Graphics.FillRectangle(brush, newRect);
                e.Graphics.DrawRectangle(new 
                     Pen(_HoverBorderColor, 2), newRect);
                break;
            case ButtonStyles.Ellipse:
                e.Graphics.FillEllipse(brush, newRect);
                e.Graphics.DrawEllipse(new 
                   Pen(_HoverBorderColor, 2), newRect);
                break;

        }
        e.Graphics.DrawString(this.Text, base.Font, 
          new SolidBrush(base.ForeColor), 
          textX + 1, textY + 1);
        break;
}

我的其他控件项目

• 彩色进度条.

反馈

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• 代码改进
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