/// <summary>
/// Zooms the image around the image coordinate supplied
/// in [centerX, centerY] by value, that is provided
/// by parameter zoomFactor. The zoomFactor describe the grade of zooming
/// in per cents.
/// </summary>
/// <param name="centerX"> Column coordinate of zoom center </param>
/// <param name="centerY"> Row coordinate of zoom center </param>
/// <param name="zoomFactor"> Zoom value in percenetage </param>
public void ZoomImage(double centerX, double centerY, int zoomFactor)
{
this.displayZoomValue = zoomFactor;
// zoom image
hWndControl.zoomByGUIHandle(displayZoomValue);
// repaint the graphic window
this.Invalidate();
}
private void ZoomUpDown_ValueChanged(object sender, System.EventArgs e)
{
hWndControl.zoomByGUIHandle((int)ZoomUpDown.Value);
}