/// <summary>
/// Really a helper for FindDownInTree, typically not called directly.
/// </summary>
/// <param name="lst"></param>
/// <param name="parent"></param>
/// <param name="ignore"></param>
/// <param name="helper"></param>
public static void FindDownInTree(List<FrameworkElement> lst, DependencyObject parent, DependencyObject ignore, IFinderMatchVisualHelper helper)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
if (lst.Count > 0 && helper.StopAfterFirst) break;
DependencyObject visual = VisualTreeHelper.GetChild(parent, i);
if (visual is FrameworkElement)
{
(visual as FrameworkElement).ApplyTemplate();
}
if (helper.DoesMatch(visual))
{
lst.Add(visual as FrameworkElement);
}
if (lst.Count > 0 && helper.StopAfterFirst) break;
if (visual != ignore)
{
FindDownInTree(lst, visual, ignore, helper);
}
}
}
/// <summary>
/// Really a helper to look Up in a tree, typically not called directly.
/// </summary>
/// <param name="lst"></param>
/// <param name="parent"></param>
/// <param name="ignore"></param>
/// <param name="helper"></param>
public static void FindUpInTree(List<FrameworkElement> lst, Visual parent, Visual ignore, IFinderMatchVisualHelper helper)
{
// First thing to do is find Down in the existing node...
//FindDownInTree(lst, parent, ignore, helper);
if (helper.DoesMatch(parent))
{
lst.Add(parent as FrameworkElement);
}
// Ok, now check to see we are not at a stop.. i.e. got it.
if (lst.Count > 0 && helper.StopAfterFirst)
{
// Hum, don't think we need to do anything here: yet.
}
else
{
// Ok, now try to get a new parent...
FrameworkElement feCast = parent as FrameworkElement;
if (feCast != null)
{
FrameworkElement feNewParent = feCast.Parent as FrameworkElement;
if (feNewParent == null || feNewParent == feCast)
{
// Try to get the templated parent
feNewParent = feCast.TemplatedParent as FrameworkElement;
}
// Now check to see that we have a valid parent
if (feNewParent != null && feNewParent != feCast)
{
// Pass up
FindUpInTree(lst, feNewParent, feCast, helper);
}
}
}
}
/// <summary>
/// Walker that looks both UP and down in the visual tree for any matching elements, typically used with Type
/// </summary>
/// <param name="parent">Start point in the tree to search</param>
/// <param name="helper">Match Helper to use</param>
/// <returns>List of matching FrameworkElements</returns>
public static List<FrameworkElement> FindInTree(Visual parent, IFinderMatchVisualHelper helper)
{
List<FrameworkElement> lst = new List<FrameworkElement>();
FindUpInTree(lst, parent, null, helper);
return lst;
}
/// <summary>
/// All way visual tree helper that searches UP and DOWN in a tree for the matching pattern.
///
/// This is used to walk for name matches or type matches typically.
///
/// Returns only the first matching element
/// </summary>
/// <param name="parent">Start point in the tree to search</param>
/// <param name="helper">Match Helper to use</param>
/// <returns>Null if no match, else returns the first element that matches</returns>
public static FrameworkElement SingleFindInTree(Visual parent, IFinderMatchVisualHelper helper)
{
helper.StopAfterFirst = true;
List<FrameworkElement> lst = FindInTree(parent, helper);
FrameworkElement feRet = null;
if (lst.Count > 0) feRet = lst[0];
return feRet;
}
/// <summary>
/// Really a helper for FindDownInTree, typically not called directly.
/// </summary>
/// <param name="lst"></param>
/// <param name="parent"></param>
/// <param name="ignore"></param>
/// <param name="helper"></param>
public static void FindDownInTree(List <FrameworkElement> lst, DependencyObject parent, DependencyObject ignore, IFinderMatchVisualHelper helper)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
if (lst.Count > 0 && helper.StopAfterFirst)
{
break;
}
DependencyObject visual = VisualTreeHelper.GetChild(parent, i);
if (visual is FrameworkElement)
{
(visual as FrameworkElement).ApplyTemplate();
}
if (helper.DoesMatch(visual))
{
lst.Add(visual as FrameworkElement);
}
if (lst.Count > 0 && helper.StopAfterFirst)
{
break;
}
if (visual != ignore)
{
FindDownInTree(lst, visual, ignore, helper);
}
}
}
/// <summary>
/// Really a helper to look Up in a tree, typically not called directly.
/// </summary>
/// <param name="lst"></param>
/// <param name="parent"></param>
/// <param name="ignore"></param>
/// <param name="helper"></param>
public static void FindUpInTree(List <FrameworkElement> lst, Visual parent, Visual ignore, IFinderMatchVisualHelper helper)
{
// First thing to do is find Down in the existing node...
//FindDownInTree(lst, parent, ignore, helper);
if (helper.DoesMatch(parent))
{
lst.Add(parent as FrameworkElement);
}
// Ok, now check to see we are not at a stop.. i.e. got it.
if (lst.Count > 0 && helper.StopAfterFirst)
{
// Hum, don't think we need to do anything here: yet.
}
else
{
// Ok, now try to get a new parent...
FrameworkElement feCast = parent as FrameworkElement;
if (feCast != null)
{
FrameworkElement feNewParent = feCast.Parent as FrameworkElement;
if (feNewParent == null || feNewParent == feCast)
{
// Try to get the templated parent
feNewParent = feCast.TemplatedParent as FrameworkElement;
}
// Now check to see that we have a valid parent
if (feNewParent != null && feNewParent != feCast)
{
// Pass up
FindUpInTree(lst, feNewParent, feCast, helper);
}
}
}
}
public static void FindUpInTree(List <FrameworkElement> lst, Visual parent, Visual ignore, IFinderMatchVisualHelper helper)
{
if (helper.DoesMatch(parent))
{
lst.Add((FrameworkElement)parent);
}
if (!(lst.Count > 0 && helper.FindFirst) && parent is FrameworkElement element)
{
FrameworkElement nParent = (FrameworkElement)element.Parent;
if (nParent == null || nParent == element)
{
nParent = (FrameworkElement)element.TemplatedParent;
}
if (nParent != null && nParent != element)
{
WpfHelper.FindUpInTree(lst, nParent, element, helper);
}
}
}
