private void GetSnapshot()
{
var p = MousePosition;
var scaling = Util.GetScalingFactor();
p.X = (int)(p.X * scaling);
p.Y = (int)(p.Y * scaling);
p.X -= (int)(_mSnapshot.Width * scaling) / 2;
p.Y -= (int)(_mSnapshot.Height * scaling) / 2;
using (var dc = Graphics.FromImage(_mSnapshot))
{
dc.CopyFromScreen(p, new Point(0, 0), _mSnapshot.Size);
Refresh(); //Invalidate();
var center = Util.Center(new RectangleF(0, 0, _mSnapshot.Size.Width, _mSnapshot.Size.Height));
var c = _mSnapshot.GetPixel((int)Math.Ceiling(center.X), (int)Math.Ceiling(center.Y));
if (c == SelectedColor)
{
return;
}
SelectedColor = c;
SelectedColorChanged?.Invoke(this, null);
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if ((e.Button & MouseButtons.Left) != MouseButtons.Left)
{
return;
}
Cursor = Cursors.Cross;
//Remember that the monitor dpi setting can change while the app is running,
//so we really need to check this each time we start capturing.
_dpiScaleFactor = Util.GetScalingFactor();
_isCapturing = true;
Invalidate();
}