public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
var parent = container;
while (parent is not null and not ComboBox and not ComboBoxItem)
{
parent = VisualTreeHelper.GetParent(parent);
}
return(parent is ComboBoxItem ? DropdownItemsTemplate ?? DropdownItemsTemplateSelector?.SelectTemplate(item, container)
: SelectedItemTemplate ?? SelectedItemTemplateSelector?.SelectTemplate(item, container));
}
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
var parent = container;
while (parent != null && !(parent is ComboBoxItem) && !(parent is ComboBox))
{
parent = VisualTreeHelper.GetParent(parent);
}
var isInDropdown = (parent is ComboBoxItem);
return(isInDropdown
? DropdownItemTemplate ?? DropdownItemTemplateSelector?.SelectTemplate(item, container)
: SelectedItemTemplate ?? SelectedItemTemplateSelector?.SelectTemplate(item, container));
}
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
//Search up visual tree, stopping at either a ComboBox or a ComboBoxItem (or null). This will determine which template to use
while (container != null && !(container is ComboBox) && !(container is ComboBoxItem))
{
container = VisualTreeHelper.GetParent(container);
}
//If you stopped at a ComboBoxItem, you're in the dropdown
var inDropDown = container is ComboBoxItem;
return(inDropDown
? ItemTemplate
?? ItemTemplateSelector?.SelectTemplate(item, container)
: SelectedItemTemplate
?? SelectedItemTemplateSelector?.SelectTemplate(item, container));
}
public override DataTemplate?SelectTemplate(object item, DependencyObject container)
{
var parent = container;
// Search up the visual tree, stopping at either a ComboBox or
// a ComboBoxItem (or null). This will determine which template to use
while (parent != null && parent is not ComboBoxItem && parent is not ComboBox)
{
parent = VisualTreeHelper.GetParent(parent);
}
// If you stopped at a ComboBoxItem, you're in the dropdown
var inDropDown = parent is ComboBoxItem;
return(inDropDown
? DropdownItemsTemplate ?? DropdownItemsTemplateSelector?.SelectTemplate(item, container)
: SelectedItemTemplate ?? SelectedItemTemplateSelector?.SelectTemplate(item, container));
}
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
DependencyObject itemToCheck = container;
// Search up the visual tree, stopping at either a ComboBox or
// a ComboBoxItem (or null). This will determine which template to use
while (itemToCheck != null && !(itemToCheck is ComboBoxItem) && !(itemToCheck is ComboBox))
{
itemToCheck = VisualTreeHelper.GetParent(itemToCheck);
}
// If you stopped at a ComboBoxItem, you're in the dropdown
bool inDropDown = itemToCheck is ComboBoxItem;
return(inDropDown
? DropdownItemsTemplate ?? DropdownItemsTemplateSelector?.SelectTemplate(item, container)
: SelectedItemTemplate ?? SelectedItemTemplateSelector?.SelectTemplate(item, container));
}
private View CreateSelectedItem(object item)
{
View selectedItemView = null;
if (SelectedItemTemplateSelector != null)
{
DataTemplate actualTemplate = SelectedItemTemplateSelector.SelectTemplate(item, null);
selectedItemView = SelectedItemTemplate.CreateContent() as View;
}
else if (SelectedItemTemplate != null)
{
selectedItemView = SelectedItemTemplate.CreateContent() as View;
}
else
{
throw new Exception("DropDown SelectedItemTemplateSelector and SelectedItemTemplate is null!");
}
return(selectedItemView);
}
