public void SetZoom(float zoomfactor)
{
if (zoomfactor <= 0)
{
throw new Exception("Zoom must be positive");
}
float oldZoom = Zoom;
Zoom = zoomfactor / 100f;
ScaleM.Reset();
ScaleM.Scale(Zoom, Zoom);
if (ImgSize != Size.Empty)
{
Size = new Size((int)(ImgSize.Width * Zoom),
(int)(ImgSize.Height * Zoom));
}
}
public void setZoom(float zoomfactor)
{
if (zoomfactor <= 0)
{
throw new Exception("Zoom must be positive");
}
float oldZoom = Zoom;
Zoom = zoomfactor / 100f;
ScaleM.Scale(Zoom, Zoom);
// zoom the Image by changing the PB's size:
if (ImgSize != Size.Empty)
{
Size =
new Size((int)(ImgSize.Width * Zoom), (int)(ImgSize.Height * Zoom));
}
// here we rescale all point in the list
for (int i = 0; i < ScaledPoints.Count; i++)
{
ScaledPoints[i] = new PointF(ScaledPoints[i].X * Zoom / oldZoom,
ScaledPoints[i].Y * Zoom / oldZoom);
}
}
