public static void MouseWheelFunc(MainVm mainVm, int delta)
{
if (mainVm.PreviewStatus == Visibility.Visible)
{
//向前
if (delta > 0)
{
int i = mainVm.SingleList.IndexOf(mainVm.SelectedPreview) - 1;
if (i >= 0)
{
mainVm.SelectedPreview = mainVm.SingleList[i];
}
}
//向后
else if (delta < 0)
{
int i = mainVm.SingleList.IndexOf(mainVm.SelectedPreview) + 1;
if (i < mainVm.PageCount)
{
mainVm.SelectedPreview = mainVm.SingleList[i];
}
}
mainVm.GetAverageColorByLocalFile();
}
}
static MainVm()
{
if (instance == null)
{
instance = new MainVm();
}
}
private void MainWindow_MouseWheel(object sender, MouseWheelEventArgs e)
{
if (this.DataContext != null)
{
mainVm = DataContext as MainVm;
}
PreviewCommon.MouseWheelFunc(mainVm, e.Delta);
}
