private void CameraPlay_Paint(object sender, PaintEventArgs pe)
{
if ((needSizeUpdate) || (firstFrame))
{
UpdatePosition();
needSizeUpdate = false;
}
Monitor.Enter(pnVideo);
Graphics g = pnVideo.CreateGraphics();
Rectangle rc = this.ClientRectangle;
Pen pen;
if (ClickMe)
{
pen = new Pen(Color.Green, 3);
g.DrawRectangle(pen, rc.X, rc.Y, rc.Width - 2, rc.Height - 2);
}
else
{
pen = new Pen(Color.Black, 1);
g.DrawRectangle(pen, rc.X, rc.Y, rc.Width - 1, rc.Height - 1);
}
if (camera != null)
{
camera.Lock();
// draw frame
if (camera.LastFrame != null)
{
g.DrawImage(camera.LastFrame, rc.X + 1, rc.Y + 1, rc.Width - 3, rc.Height - 3);
firstFrame = false;
}
else
{
// Create font and brush
Font drawFont = new Font("Arial", 12);
SolidBrush drawBrush = new SolidBrush(Color.White);
g.DrawString("连接中 ...", drawFont, drawBrush, new PointF(5, 5));
drawBrush.Dispose();
drawFont.Dispose();
}
camera.Unlock();
}
pen.Dispose();
// unlock
Monitor.Exit(pnVideo);
base.OnPaint(pe);
}