// 圆所在矩形的左上角点坐标x, y; 直径dia; which: 0(北京时间), 1(世界统一时间)
private void DrawClock(Graphics g, int x, int y, int dia, int hour, int minu, int sec, bool which)
{
// 绘制表盘
g.DrawEllipse(giveMePen(Color.Black, 1), x, y, dia, dia);
// 得到秒针、分针、时针终点位置
int rad = dia / 2;
Point center = new Point(x + rad, y + rad);
Point secPoint = new Point((int)(center.X + (Math.Sin(sec * PI / 30) * (rad / 10 * 9))),
(int)(center.Y - (Math.Cos(sec * PI / 30) * (rad / 10 * 9))));
Point minPoint = new Point((int)(center.X + (Math.Sin(minu * PI / 30) * (rad / 10 * 7))),
(int)(center.Y - (Math.Cos(minu * PI / 30) * (rad / 10 * 7))));
Point hourPoint = new Point((int)(center.X + (Math.Sin((hour + (double)minu / 60) * PI / 12) * (rad / 10 * 5))),
(int)(center.Y - (Math.Cos((hour + (double)minu / 60) * PI / 12) * (rad / 10 * 5))));
// 显示时钟表盘
Graphics ng = this.CreateGraphics();
ng.TranslateTransform(center.X, center.Y);
for (int i = 0; i < 60; ++i)
{
if (i % 5 == 0)
{
ng.FillRectangle(new SolidBrush(Color.Gray), -1, 2 - rad, 2, rad / 15);
}
else
{
ng.FillRectangle(new SolidBrush(Color.Gray), 0, 2 - rad, 1, rad / 18);
}
ng.RotateTransform(6);
}
// 显示时钟指针
g.DrawLine(giveMePen(Color.Red, 1), center, secPoint);
g.DrawLine(giveMePen(Color.Black, 2), center, minPoint);
g.DrawLine(giveMePen(Color.Black, 3), center, hourPoint);
// 显示时区、时间字符串 which: 0(北京时间), 1(世界统一时间)
if (which)
{
int len = rad / 10;
UTC.SetBounds(center.X - len, center.Y - rad - 2 * len, len, 2 * len);
UTCDate.SetBounds(center.X + 2 * rad, center.Y - rad / 3, rad, 2 * rad);
UTCDate.Text = hour.ToString().PadLeft(2, '0') + ":" + minu.ToString().PadLeft(2, '0') + ":" + sec.ToString().PadLeft(2, '0');
UTCDate.Font = new Font("隶书", rad / 2, FontStyle.Regular);
}
else
{
int len = rad / 10;
BeiJing.SetBounds(center.X - 3 * len, center.Y - rad - 2 * len, len, 2 * len);
BJDate.SetBounds(center.X + 2 * rad, center.Y - rad / 3, rad, 2 * rad);
BJDate.Text = hour.ToString().PadLeft(2, '0') + ":" + minu.ToString().PadLeft(2, '0') + ":" + sec.ToString().PadLeft(2, '0');
BJDate.Font = new Font("隶书", rad / 2, FontStyle.Regular);
}
}
public static UTCDate OrToday(this UTCDate ctx)
{
return(ctx ?? UTCDate.Today);
}