protected override void AddChildItemToVisualTree(object newItem)
{
if (_useNativeComboBox)
{
object value = PropertyPathHelper.AccessValueByApplyingPropertyPathIfAny(newItem, DisplayMemberPath);
//if (value is UIElement)
//{
// SwitchToNonNativeComboBox(); // If the value is a UI element, we should switch to a non-native combo box:
//}
//else
//{
if (value != null)
{
if (_nativeComboBoxDomElement != null)
{
var optionDomElement = INTERNAL_HtmlDomManager.AddOptionToNativeComboBox(_nativeComboBoxDomElement, value.ToString());
_itemContainerGenerator.INTERNAL_RegisterContainer(optionDomElement, newItem);
}
}
//todo: else --> ?
//}
}
else
{
base.AddChildItemToVisualTree(newItem);
}
}
// Add an empty option at the beginning of the combobox.
private void AddEmptyOption()
{
// Add an empty element that will make it easier to have
// nothing selected when items are added to the ComboBox:
// See: http://stackoverflow.com/questions/8605516/default-select-option-as-blank
var emptyOption = INTERNAL_HtmlDomManager.AddOptionToNativeComboBox(this._nativeComboBoxDomElement, "", 0);
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.disabled = true", emptyOption);
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.selected = true", emptyOption);
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.style.display = 'hidden'", emptyOption);
}
private void AddOption(object option, int index)
{
if (this._nativeComboBoxDomElement == null)
{
return;
}
object value = PropertyPathHelper.AccessValueByApplyingPropertyPathIfAny(option, this.DisplayMemberPath);
if (value != null)
{
INTERNAL_HtmlDomManager.AddOptionToNativeComboBox(
this._nativeComboBoxDomElement,
value.ToString(),
index);
}
}
public override object CreateDomElement(object parentRef, out object domElementWhereToPlaceChildren)
{
if (_useNativeComboBox)
{
var select = INTERNAL_HtmlDomManager.CreateDomElementAndAppendIt("select", parentRef, this);
domElementWhereToPlaceChildren = select;
_nativeComboBoxDomElement = select;
INTERNAL_EventsHelper.AttachToDomEvents("change", select, (Action <object>)(e =>
{
DomSelectionChanged(select);
}));
INTERNAL_HtmlDomManager.SetDomElementStyleProperty(select, new List <string>()
{
"fontSize"
}, "inherit");
// Add an empty element that will make it easier to have nothing selected when items are added to the ComboBox: // See: http://stackoverflow.com/questions/8605516/default-select-option-as-blank
var emptyOption = INTERNAL_HtmlDomManager.AddOptionToNativeComboBox(_nativeComboBoxDomElement, "");
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.disabled = true", emptyOption);
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.selected = true", emptyOption);
CSHTML5.Interop.ExecuteJavaScriptAsync("$0.style.display = 'hidden'", emptyOption);
// Set the mark saying that the pointer events must be "absorbed" by the ComboBox:
INTERNAL_HtmlDomManager.SetDomElementProperty(select, "data-absorb-events", true);
return(select);
}
else
{
#if !BRIDGE
return(base.CreateDomElement(parentRef, out domElementWhereToPlaceChildren));
#else
return(CreateDomElement_WorkaroundBridgeInheritanceBug(parentRef, out domElementWhereToPlaceChildren));
#endif
}
}
