protected override void Invoke(object parameter)
{
if (TargetControl == null || ScrollViewer == null)
{
throw new ArgumentNullException($"{ScrollViewer} or {TargetControl} cannot be null");
}
// 检查指定的控件是否在指定的 ScrollViewer 中
// TODO: 这里只是指定离它最近的 ScrollViewer，并没有继续向上找
var container = WpfTreeHelper.FindParentControl <ScrollViewer>(TargetControl);
if (container == null || container != ScrollViewer)
{
throw new Exception("The TargetControl is not in the target ScrollViewer");
}
// 获取要定位之前 ScrollViewer 目前的滚动位置
var currentScrollPosition = ScrollViewer.VerticalOffset;
var point = new Point(0, currentScrollPosition);
// 计算出目标位置并滚动
var targetPosition = TargetControl.TransformToVisual(ScrollViewer).Transform(point);
ScrollViewer.ScrollToVerticalOffset(targetPosition.Y);
}
private static void ExecuteSetters(AyVisualState item, FrameworkElement w)
{
Window _parentWindow = null;
if (w is Window)
{
_parentWindow = w as Window;
}
else
{
_parentWindow = Window.GetWindow(w);
}
UserControl _parentUserControl = null;
if (w is UserControl)
{
_parentUserControl = w as UserControl;
}
else
{
_parentUserControl = WpfTreeHelper.FindParentControl <UserControl>(w);
}
Page _parentPage = null;
if (w is Page)
{
_parentPage = w as Page;
}
else
{
_parentPage = WpfTreeHelper.FindParentControl <Page>(w);
}
foreach (var setter2 in item.Setters)
{
if (setter2 is DataSetter)
{
var setter = setter2 as DataSetter;
if (setter.TargetName != null)
{
switch (setter.Scope)
{
case DataSetterScope.Current:
var _CurrentFind = w.FindName(setter.TargetName) as UIElement;
if (_CurrentFind != null)
{
_CurrentFind.SetValue(setter.Property, setter.Value);
}
break;
case DataSetterScope.ParentWindow:
if (_parentWindow != null)
{
var _ParentWindowFind = _parentWindow.FindName(setter.TargetName) as UIElement;
if (_ParentWindowFind != null)
{
_ParentWindowFind.SetValue(setter.Property, setter.Value);
}
}
break;
case DataSetterScope.ParentPage:
if (_parentPage != null)
{
var _ParentPageFind = _parentPage.FindName(setter.TargetName) as UIElement;
if (_ParentPageFind != null)
{
_ParentPageFind.SetValue(setter.Property, setter.Value);
}
}
break;
}
}
}
else if (setter2 is ResourceSetter)
{
var setter = setter2 as ResourceSetter;
if (setter.TargetName != null)
{
switch (setter.Scope)
{
case ResourceSetterScope.FindInPageResource:
if (_parentPage != null)
{
var _resources = _parentPage.Resources;
_resources[setter.TargetName] = Convert.ChangeType(setter.ResourceValue, setter.ResourceType);
}
break;
case ResourceSetterScope.FindInApplicationResource:
if (_parentPage != null)
{
var _resources = Application.Current.Resources;
_resources[setter.TargetName] = Convert.ChangeType(setter.ResourceValue, setter.ResourceType);
}
break;
case ResourceSetterScope.FindInWindowResource:
if (_parentPage != null)
{
var _resources = _parentWindow.Resources;
_resources[setter.TargetName] = Convert.ChangeType(setter.ResourceValue, setter.ResourceType);
}
break;
case ResourceSetterScope.FindInUserControlResource:
if (_parentPage != null)
{
var _resources = _parentUserControl.Resources;
_resources[setter.TargetName] = Convert.ChangeType(setter.ResourceValue, setter.ResourceType);
}
break;
}
}
}
}
}