上位机学习记录(7) 小边框控件编写
public partial class HeadPanel : Panel
{
public HeadPanel()
{
InitializeComponent();
//初始化
base.SetStyle(ControlStyles.UserPaint | ControlStyles.SupportsTransparentBackColor, true);
base.SetStyle(ControlStyles.ResizeRedraw, true);
base.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
base.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.sf = new StringFormat();
this.sf.Alignment = StringAlignment.Center;
this.sf.LineAlignment = StringAlignment.Center;
}
private StringFormat sf;
private string titleText= "系统控制";
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取标题文本")]
public string TitleText
{
get { return titleText; }
set
{
titleText = value;
this.Invalidate();
}
}
private Color themeColor=Color.FromArgb(2, 69, 163);
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取标题文本背景色")]
public Color ThemeColor
{
get { return themeColor; }
set
{
themeColor = value;
this.Invalidate();
}
}
private Color themeForeColor = Color.White;
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取标题文本前景色")]
public Color ThemeForeColor
{
get { return themeForeColor; }
set
{
themeForeColor = value;
this.Invalidate();
}
}
private int headHeight=40;
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取标题栏高度")]
public int HeadHeight
{
get { return headHeight; }
set
{
headHeight = value;
this.Invalidate();
}
}
private Color borderColor=Color.Gray;
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取边框颜色")]
public Color BorderColor
{
get { return borderColor; }
set
{
borderColor = value;
this.Invalidate();
}
}
private float linearGradientRate=0.4F;
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取背景色渐变系数")]
public float LinearGradientRate
{
get { return linearGradientRate; }
set
{
linearGradientRate = value;
this.Invalidate();
}
}
private ContentAlignment textAlign=ContentAlignment.MiddleCenter;
[Browsable(true)]
[Category("自定义属性")]
[Description("设置或获取标题文本位置")]
public ContentAlignment TextAlign
{
get { return textAlign; }
set
{
textAlign = value;
switch (textAlign)
{
case ContentAlignment.TopLeft:
this.sf.Alignment = StringAlignment.Near;
this.sf.LineAlignment = StringAlignment.Near;
break;
case ContentAlignment.TopCenter:
this.sf.Alignment = StringAlignment.Center;
this.sf.LineAlignment = StringAlignment.Near;
break;
case ContentAlignment.TopRight:
this.sf.Alignment = StringAlignment.Far;
this.sf.LineAlignment = StringAlignment.Near;
break;
case ContentAlignment.MiddleLeft:
this.sf.Alignment = StringAlignment.Near;
this.sf.LineAlignment = StringAlignment.Center;
break;
case ContentAlignment.MiddleCenter:
this.sf.Alignment = StringAlignment.Center;
this.sf.LineAlignment = StringAlignment.Center;
break;
case ContentAlignment.MiddleRight:
this.sf.Alignment = StringAlignment.Far;
this.sf.LineAlignment = StringAlignment.Center;
break;
case ContentAlignment.BottomLeft:
this.sf.Alignment = StringAlignment.Near;
this.sf.LineAlignment = StringAlignment.Far;
break;
case ContentAlignment.BottomCenter:
this.sf.Alignment = StringAlignment.Center;
this.sf.LineAlignment = StringAlignment.Far;
break;
case ContentAlignment.BottomRight:
this.sf.Alignment = StringAlignment.Far;
this.sf.LineAlignment = StringAlignment.Far;
break;
default:
break;
}
this.Invalidate();
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics graphics = e.Graphics;
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
//创建矩形
Rectangle rectangle = new Rectangle(0, 0, this.Width, this.headHeight);
//创建画刷
LinearGradientBrush linearGradientBrush = new LinearGradientBrush(rectangle,ChangeColor(this.themeColor,linearGradientRate),this.themeColor,LinearGradientMode.Horizontal);
//绘制
graphics.FillRectangle(linearGradientBrush, rectangle);
//写文字
SolidBrush solidBrush = new SolidBrush(this.themeForeColor);
graphics.DrawString(this.titleText, this.Font, solidBrush, rectangle, this.sf);
//绘制边框
graphics.DrawRectangle(new Pen(this.borderColor), new Rectangle(0, 0, this.Width - 1, this.Height - 1));
graphics.DrawLine(new Pen(this.borderColor), 0, this.headHeight, this.Width, this.headHeight);
}
private Color ChangeColor(Color color, float correctionFactor)
{
if (correctionFactor > 1.0f) correctionFactor = 1.0f;
if (correctionFactor < -1.0f) correctionFactor = -1.0f;
float red = (float)color.R;
float green = (float)color.G;
float blue = (float)color.B;
if (correctionFactor < 0)
{
correctionFactor = 1 + correctionFactor;
red *= correctionFactor;
green *= correctionFactor;
blue *= correctionFactor;
}
else
{
red = (255 - red) * correctionFactor + red;
green = (255 - green) * correctionFactor + green;
blue = (255 - blue) * correctionFactor + blue;
}
if (red < 0) red = 0;
if (red > 255) red = 255;
if (green < 0) green = 0;
if (green > 255) green = 255;
if (blue < 0) blue = 0;
if (blue > 255) blue = 255;
return Color.FromArgb(color.A, (int)red, (int)green, (int)blue);
}
}