protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (_readOnly)
{
return;
}
int x = e.X;
int y = e.Y;
int nh = 1;
float yOffset = 0;
float xOffset = this.AutoScrollPosition.X;
SizeF size = mathExp.ExpSize;
if (size.Height > 0)
{
while (y > (nh * (size.Height + 8)))
{
yOffset += (size.Height + 8);
xOffset -= this.ClientSize.Width;
nh++;
}
y -= (int)yOffset;
x -= (int)xOffset;
}
HitTestResult hit = mathExp.HightLight(new PointF(x, y));
if (hit != null)
{
Graphics g = this.CreateGraphics();
System.Drawing.Drawing2D.GraphicsState gt0 = g.Save();
if (_lastOffsetSaved)
{
g.TranslateTransform(_lastOffsetX, _lastOffsetY);
}
if (hit.Replaced != null)
{
g.DrawRectangle(Pens.White, hit.Replaced.Bounds);
}
g.Restore(gt0);
g.TranslateTransform(xOffset, yOffset);
_lastOffsetX = xOffset;
_lastOffsetY = yOffset;
_lastOffsetSaved = true;
if (hit.Current != null)
{
_highlighted = hit.Current;
g.DrawRectangle(pen, hit.Current.Bounds);
}
g.Restore(gt0);
}
}