public static void SetScrollBarWidth(DependencyObject target, double width)
{
var thumb = VisualHelper.FindVisualChild <ScrollBar>(target, "VerticalScrollBar");
if (thumb != null)
{
thumb.MaxWidth = thumb.MinWidth = width;
}
}
private void ViewPage_Unloaded(object sender, RoutedEventArgs e)
{
var sd = sender as ListViewItem;
if (sd != null)
{
var _t = VisualHelper.FindVisualChild(sd, "Gif_Image", typeof(ExToolKit.GIFImage)) as ExToolKit.GIFImage;
//停止GIF播放并释放GIF图像资源
if (_t != null)
{
_t.ReleaseImages();
}
}
}
private void DialogBase_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
var parent = VisualTreeHelper.GetParent(this);
if (parent != null)
{
var rectangle = VisualHelper.FindVisualChild <Rectangle>(parent);
if (rectangle != null)
{
rectangle.Tapped += (s, a) => { Hide(); };
}
}
Load();
}
public void FindVisualChildTest()
{
var cnt = new ContentControl();
var btn = new Button();
//btn.Tag = "MyTag";
btn.Name = "MyTag";
cnt.Content = btn;
cnt.Focus();
Visual myVisual = btn;
string tagOrNameToSearch = "MyTag";
FrameworkElement expected = btn; // TODO: Initialize to an appropriate value
FrameworkElement actual;
actual = VisualHelper.FindVisualChild(myVisual, tagOrNameToSearch);
Assert.AreEqual(expected, actual);
}
private void NavigationPanel_Loaded(object sender, RoutedEventArgs e)
{
mHeaderList = VisualHelper.FindVisualChildrenEx <AduGroupBoxNor>(this.PART_ContentPresenter);
if (mHeaderList != null)
{
List <object> list = new List <object>();
mHeaderList.ForEach(p => list.Add(p));
this.ItemsSource = list;
}
this.mScrollViewer = VisualHelper.FindVisualChild <ScrollViewer>(this.PART_ContentPresenter);
if (this.mScrollViewer != null)
{
this.mScrollViewer.ScrollChanged += MScrollViewer_ScrollChanged;
}
object item = this.mHeaderList[this.IndicatorSelectedIndex];
this.ScrollToSelection(item);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null || !(value is TreeViewItem))
{
return(new System.Windows.Thickness(0, 0, 0, 0));
}
else
{
var P = VisualHelper.FindVisualParent((TreeViewItem)value, null, typeof(TreeViewItem));
if (P != null)
{
var C = VisualHelper.FindVisualChild(P, "Head_Grid", typeof(Grid)) as Grid;
if (C != null)
{
return(new Thickness(C.Margin.Left + 10, 0, 0, 0));
}
}
}
return(new System.Windows.Thickness(0, 0, 0, 0));
}
private void TabDrop(DropEventArgs e)
{
foreach (var item in tabs)
{
ListBoxItem myListBoxItem = (ListBoxItem)(TabsList.ItemContainerGenerator.ContainerFromItem(item));
ContentPresenter myContentPresenter = VisualHelper.FindVisualChild <ContentPresenter>(myListBoxItem);
if (myContentPresenter.IsMouseOver)
{
var tabPosition = myContentPresenter.TransformToAncestor(FindMyWindow())
.Transform(new Point(0, 0));
var position = new Point(e.RelativeMousePosition.X - tabPosition.X, e.RelativeMousePosition.Y - tabPosition.Y);
TabDropOnElement(item, position, e.Data as Model.UI.TabItem);
return;
}
}
TabDropOnEmptyArea(e.Data as Model.UI.TabItem);
}
private static void OnIsClippedChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var beh = (MoveToViewboxBehavior)sender;
Grid grid = beh.AssociatedObject;
Viewbox vb = VisualHelper.FindVisualChild <Viewbox>(grid);
ContentPresenter cp = VisualHelper.FindVisualChild <ContentPresenter>(grid);
if ((bool)e.NewValue)
{
// is clipped, so move content to Viewbox
UIElement element = cp.Content as UIElement;
cp.Content = null;
vb.Child = element;
}
else
{
// can be shown without clipping, so move content to ContentPresenter
cp.Content = vb.Child;
vb.Child = null;
}
}
/// <summary>
/// 平滑滚动至指定元素
/// </summary>
/// <param name="itemsControl"></param>
/// <param name="item"></param>
public static void AnimateScrollIntoView(this ItemsControl itemsControl, object item)
{
ScrollViewer scrollViewer = VisualHelper.FindVisualChild <ScrollViewer>(itemsControl);
if (scrollViewer == null)
{
return;
}
UIElement container = itemsControl.ItemContainerGenerator.ContainerFromItem(item) as UIElement;
if (container == null)
{
return;
}
int index = itemsControl.ItemContainerGenerator.IndexFromContainer(container);
//平滑滚动到元素所在位置
//double toValue = scrollViewer.ScrollableHeight * ((double)index / itemsControl.Items.Count);
//平滑滚动，将选中的元素置顶
double toValue = VisualTreeHelper.GetOffset(container).Y;
DoubleAnimation verticalAnimation = new DoubleAnimation();
verticalAnimation.From = scrollViewer.VerticalOffset;
verticalAnimation.To = toValue;
verticalAnimation.DecelerationRatio = .2;
verticalAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(200));
Storyboard storyboard = new Storyboard();
storyboard.Children.Add(verticalAnimation);
Storyboard.SetTarget(verticalAnimation, scrollViewer);
Storyboard.SetTargetProperty(verticalAnimation, new PropertyPath(ScrollViewerBehavior.VerticalOffsetProperty));
storyboard.Begin();
}
private void ProjectItemDetailsViewOnLoaded(object sender, RoutedEventArgs e)
{
_errorsGridScrollViewer = VisualHelper.FindVisualChild <ScrollViewer>(ErrorsGrid);
Debug.Assert(_errorsGridScrollViewer != null);
}