/// <summary>
/// スクロールビューを1段階縮小する
/// </summary>
/// <param name="scrollViewer"></param>
private void scaleDownScrollViewer(ScrollViewer scrollViewer)
{
float factor = scrollViewer.ZoomFactor;
if (factor <= this.ViewModel.MinZoomFactor)
{
return;
}
scrollViewer.ZoomToFactor(factor - ZOOM_UPDOWN_UNIT);
}
/// <summary>
/// スクロールビューを1段階拡大する
/// </summary>
/// <param name="scrollViewer"></param>
private void scaleUpScrollViewer(ScrollViewer scrollViewer)
{
float factor = scrollViewer.ZoomFactor;
if (factor >= this.ViewModel.MaxZoomFactor)
{
return;
}
scrollViewer.ZoomToFactor(factor + ZOOM_UPDOWN_UNIT);
}
