private void DisplayBox_MouseMove(object sender, MouseEventArgs e)
{
if (isMouseDown && isDrawEnabled)
{
if (lastPoint != null)
{
if (DisplayBox.Image == null)
{
Bitmap bmp = new Bitmap(DisplayBox.Width, DisplayBox.Height);
DisplayBox.Image = bmp;
}
using (Graphics g = Graphics.FromImage(DisplayBox.Image))
{
g.DrawLine(new Pen(Color.Black, 2), lastPoint, e.Location);
g.SmoothingMode = SmoothingMode.AntiAlias;
}
DisplayBox.Invalidate(); //refreshes the picturebox
lastPoint = e.Location; //keep assigning the lastPoint
}
}
}
private void RefreshDisplayBox()
{
DisplayBox.Invalidate();
}