private void ListView_Loaded(object sender, RoutedEventArgs e)
{
ListView listView = (ListView)sender;
ScrollViewer scroll = VisualTreeHelperEx.FindDescendantByType <ScrollViewer>(listView);
if (scroll == null)
{
return;
}
// 鼠标横向滚动。
listView.AddHandler(MouseWheelEvent, new MouseWheelEventHandler((mouseWheelSender, mouseWheelEventArgs) =>
{
var delta = mouseWheelEventArgs.Delta;
if (delta > 0)
{
scroll.LineLeft();
}
else
{
scroll.LineRight();
}
}), true);
var bar = scroll.FindVisualChildren <ScrollBar>().ElementAt(2);
bar.ValueChanged += bar_ValueChanged;
_bottomBar = bar;
}
/// <summary>
/// Scroll to the bottom when a new item has been logged, if it was previously scrolled all the way down
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
var viewer = VisualTreeHelperEx.FindDescendantByType <ScrollViewer>(this.listViewEvents);
if (viewer != null)
{
// User scroll event : set or unset auto-scroll mode
if (e.ExtentHeightChange.Equals(0))
{
// Content unchanged : user scroll event
if (viewer.VerticalOffset.Equals(viewer.ScrollableHeight))
{
// Scroll bar is in bottom Set auto-scroll mode
this._autoScroll = true;
}
else
{
// Scroll bar isn't in bottom Unset auto-scroll mode
this._autoScroll = false;
}
}
// Content scroll event : auto-scroll eventually
if (this._autoScroll && !e.ExtentHeightChange.Equals(0))
{
// Content changed and auto-scroll mode set Autoscroll
viewer.ScrollToVerticalOffset(viewer.ExtentHeight);
}
}
}
private void lstImageRecipe_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
var MyScroll = VisualTreeHelperEx.FindDescendantByType <ScrollViewer>(sender as ListView);
if (e.Delta > 0)
{
MyScroll.LineLeft();
}
else
{
MyScroll.LineRight();
e.Handled = true;
}
}
