private void ShowDropDownExecuted(object sender)
{
BreadcrumbBar bar = sender as BreadcrumbBar;
if (bar.IsEditable && bar.DropDownItems.OfType <object>().Count() > 0)
{
bar.IsDropDownOpen = true;
}
}
private void OnSelectedBreadcrumbPropertyChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
BreadcrumbItem selected = e.NewValue as BreadcrumbItem;
bar.IsRootSelected = selected == bar.RootItem;
if (bar.IsInitialized)
{
RoutedPropertyChangedEventArgs <BreadcrumbItem> args = new RoutedPropertyChangedEventArgs <BreadcrumbItem>(e.OldValue as BreadcrumbItem, e.NewValue as BreadcrumbItem, BreadcrumbBar.SelectedBreadcrumbChangedEvent);
bar.RaiseEvent(args);
}
}
private void PathPropertyChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
string newPath = e.NewValue as string;
// bar.PathBinding = newPath;
if (!bar.IsInitialized)
{
bar.Path = bar.initPath = newPath;
}
else
{
bar.BuildBreadcrumbsFromPath(newPath);
bar.OnPathChanged(e.OldValue as string, newPath);
}
}
private static double CoerceProgressValue(IAvaloniaObject o, double baseValue)
{
BreadcrumbBar bar = o as BreadcrumbBar;
double value = (double)baseValue;
if (value > bar.ProgressMaximum)
{
value = bar.ProgressMaximum;
}
if (value < bar.ProgressMinimum)
{
value = bar.ProgressMinimum;
}
return(value);
}
protected override void OnPointerEnter(PointerEventArgs e)
{
var prop = e.GetCurrentPoint(this).Properties;
isPressed = prop.IsLeftButtonPressed;
IVisual parent = TemplatedParent as IVisual;
while (parent != null && !(parent is BreadcrumbBar))
{
parent = VisualTree.VisualExtensions.GetVisualParent(parent);
}
BreadcrumbBar bar = parent as BreadcrumbBar;
if (bar != null /* && bar.IsKeyboardFocusWithin*/) //?
{
Focus();
}
IsPressed = isPressed;
base.OnPointerEnter(e);
}
/// <summary>
/// Occurs when the Root property is changed.
/// </summary>
/// <param name="oldValue"></param>
/// <param name="newValue"></param>
protected virtual void OnRootChanged(BreadcrumbBar bar, object oldValue, object newValue)
{
if (_isInitial == false)
{
newValue = GetFirstItem(newValue);
}
BreadcrumbItem oldRoot = oldValue as BreadcrumbItem;
if (oldRoot != null)
{
oldRoot.IsRoot = false;
}
if (newValue == null)
{
RootItem = null;
Path = null;
}
else
{
BreadcrumbItem root = newValue as BreadcrumbItem;
if (root == null)
{
if (_isInitial == false)
{
root = BreadcrumbItem.CreateItem(newValue);
}
else
{
root = BreadcrumbItem.CreateInitialItem(newValue);
}
}
if (root != null)
{
root.IsRoot = true;
}
if (oldValue != null)
{
this.LogicalChildren.Remove((ILogical)oldValue);
}
RootItem = root;
if (root != null)
{
//bool result = LogicalTree.LogicalExtensions.GetLogicalParent(root as ILogical) == null;
////if (LogicalTree.LogicalExtensions.GetLogicalParent(root as ILogical) == null)
//{
// this.LogicalChildren.Remove(root);
// this.LogicalChildren.Add(root);
//}
}
SelectedItem = root != null ? root.DataContext : null;
if (IsInitialized)
{
SelectedBreadcrumb = root;
}
else
{
SelectedBreadcrumb = root;
}
}
}
private void OnRootPropertyChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
bar.OnRootChanged(bar, e.OldValue, e.NewValue);
}
/// <summary>
/// Occurs when the selected item of an embedded BreadcrumbItem is changed.
/// </summary>
/// <param name="oldvalue"></param>
/// <param name="newValue"></param>
protected virtual void OnSelectedItemChanged(BreadcrumbBar sender, object oldvalue, object newValue)
{
}
private void OnSelectedItemPropertyChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
bar.OnSelectedItemChanged(bar, e.OldValue, e.NewValue);
}
private void OverflowPressedChanged(BreadcrumbBar bar, object e)
{
bar.OnOverflowPressedChanged();
}
private void OnRootItemPropertyChanged(BreadcrumbBar o, AvaloniaPropertyChangedEventArgs e)
{
o.OnRootItemChanged((BreadcrumbItem)e.OldValue, (BreadcrumbItem)e.NewValue);
}
private void IsDropDownOpenChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
bar.OnDropDownOpenChanged((bool)e.OldValue, (bool)e.NewValue);
}
private void ProgressValuePropertyChanged(BreadcrumbBar bar, AvaloniaPropertyChangedEventArgs e)
{
RoutedEventArgs args = new RoutedEventArgs(BreadcrumbBar.ProgressValueChangedEvent);
bar.RaiseEvent(args);
}
private void OnPathBindingPropertyChanged(BreadcrumbBar o, AvaloniaPropertyChangedEventArgs e)
{
o.SetValue(PathProperty, e.NewValue);
}
/// <summary>
/// Appies the binding to the breadcrumb item.
/// </summary>
public void ApplyBinding()
{
object item = DataContext;
if (item == null)
{
return;
}
BreadcrumbItem root = this;
IDataTemplate template = HeaderTemplate;
//DataTemplateSelector templateSelector = HeaderTemplateSelector;
//if (templateSelector != null)
//{
// template = templateSelector.SelectTemplate(item, root);
//}
if (template == null)
{
//DataTemplateKey key = GetResourceKey(item);
//if (key != null)
//{
// this.TryFindResource(key, template);
//}
}
root.SelectedItem = null;
TreeDataTemplate hdt = template as TreeDataTemplate;
if (template != null)
{
//root.Header = template.LoadContent();
}
else
{
root.Header = item;
}
root.DataContext = item;
if (hdt != null)
{
// bind the Items to the hierarchical data template:
root.Bind(BreadcrumbItem.ItemsProperty, hdt.ItemsSource);
}
BreadcrumbBar bar = BreadcrumbBar;
if (bar != null)
{
if (TraceBinding == null)
{
TraceBinding = bar.TraceBinding;
}
if (ImageBinding == null)
{
ImageBinding = bar.ImageBinding;
}
}
if (TraceBinding != null)
{
root.Bind(BreadcrumbItem.TraceProperty, TraceBinding);
}
if (ImageBinding != null)
{
root.Bind(BreadcrumbItem.ImageProperty, ImageBinding);
}
ApplyProperties(item);
}
