public ParentValue UpdateAttachedParent(object source, object attachedParent, object[] args)
{
if (_parentMember != null && _parentMember.CanWrite &&
(attachedParent == null || _parentMember.Type.IsInstanceOfType(attachedParent)))
{
_parentMember.SetValue(source, args);
}
return(new ParentValue(attachedParent, _parentMember));
}
protected override void Refresh()
{
string selectedTag = _tabHost.CurrentTabTag;
var oldValues = new Dictionary <string, TabInfo>(_tabToContent);
_tabHost.CurrentTab = 0;
_tabHost.ClearAllTabs();
_tabToContent.Clear();
int count = ItemsSource.Count();
for (int i = 0; i < count; i++)
{
var tabInfo = TryRecreateTabInfo(i, oldValues);
_tabHost.AddTab(tabInfo.TabSpec);
}
foreach (var oldValue in oldValues)
{
RemoveTab(oldValue.Value);
}
if (count == 0)
{
OnEmptyTab();
}
else
{
if (selectedTag == null)
{
_tabHost.CurrentTab = 0;
if (_selectedItemMember != null)
{
_selectedItemMember.SetValue(_tabHost, new[] { GetItem(0) });
}
}
else
{
_tabHost.SetCurrentTabByTag(selectedTag);
}
}
}
private void OnEmptyTab()
{
if (_selectedItemMember != null)
{
_selectedItemMember.SetValue(TabHost, BindingExtensions.NullValue);
}
if (TabHost.TabContentView != null)
{
TabHost.TabContentView.RemoveAllViews();
}
}
/// <summary>
/// Attempts to track the value change.
/// </summary>
public IDisposable TryObserve(object source, IEventListener listener)
{
if (_isDataContext)
{
return(WeakEventManager.GetBindingContextListener(source).AddWithUnsubscriber(listener));
}
if (_memberEvent == null)
{
return(null);
}
return(_memberEvent.SetValue(source, new object[] { listener }) as IDisposable);
}
private static void PopupMenuEventChanged(View view, AttachedMemberChangedEventArgs <string> args)
{
if (string.IsNullOrEmpty(args.NewValue))
{
return;
}
IBindingMemberInfo member = BindingServiceProvider
.MemberProvider
.GetBindingMember(view.GetType(), args.NewValue, false, true);
var presenter = ServiceProvider.AttachedValueProvider.GetOrAdd(view, "!@popup", (view1, o) => new PopupMenuPresenter(view1), null);
var unsubscriber = member.SetValue(view, new object[] { presenter }) as IDisposable;
presenter.Update(unsubscriber);
}
public ParentValue UpdateAttachedParent(object source, object[] args)
{
var attachedParent = args[0];
if (_isExplicit)
{
if ((_parentMember != null) && _parentMember.CanWrite &&
((attachedParent == null) || _parentMember.Type.IsInstanceOfType(attachedParent)))
{
_parentMember.SetValue(source, args);
}
}
return(new ParentValue(attachedParent, _parentMember, _isExplicit));
}
/// <summary>
/// Attempts to track the value change.
/// </summary>
public IDisposable TryObserve(object source, IEventListener listener)
{
#if WINDOWS_PHONE
var frameworkElement = source as FrameworkElement;
if (frameworkElement != null && _path == AttachedMemberConstants.DataContext)
{
return(DataContextChangedHelper.Listen(frameworkElement, listener));
}
#endif
if (_changePropertyMember == null)
#if NETFX_CORE || WINDOWSCOMMON || WINDOWS_PHONE
{ return(new DependencyPropertyListener(source, _path, listener)); }
#else
{ return(new DependencyPropertyListener(source, _dependencyProperty, listener)); }
#endif
return(_changePropertyMember.SetValue(source, new object[] { listener }) as IDisposable);
}
private static void SetAttributeValue(View view, Context context, IAttributeSet attrs, int[] groupId,
int requiredAttributeId, string attachedMemberName, IDataContext dataContext, DataConstant <int> constant)
{
int?value = ReadAttributeValueId(context, attrs, groupId, requiredAttributeId);
if (!value.HasValue)
{
return;
}
dataContext.Add(constant, value.Value);
IBindingMemberInfo member = BindingServiceProvider
.MemberProvider
.GetBindingMember(view.GetType(), attachedMemberName, false, false);
if (member != null)
{
member.SetValue(view, new object[] { value });
}
}
private void OnEmptyTab()
{
_selectedItemMember?.SetValue(TabHost, BindingExtensions.NullValue);
TabHost.TabContentView?.RemoveAllViews();
}
/// <summary>
/// Sets the source value.
/// </summary>
/// <param name="targetAccessor">The specified accessor to get value.</param>
/// <param name="context">The specified operation context.</param>
/// <param name="throwOnError">
/// true to throw an exception if the value cannot be set.
/// </param>
protected override bool SetValueInternal(IBindingSourceAccessor targetAccessor, IDataContext context,
bool throwOnError)
{
IBindingPathMembers members = _bindingSource.GetPathMembers(throwOnError);
if (!members.AllMembersAvailable)
{
return(false);
}
object penultimateValue = members.PenultimateValue;
IBindingMemberInfo lastMember = members.LastMember;
object oldValue;
object newValue = targetAccessor.GetValue(lastMember, context, throwOnError);
if (lastMember.CanRead)
{
oldValue = lastMember.GetValue(penultimateValue, null);
if (ReferenceEquals(oldValue, newValue) || newValue.IsUnsetValueOrDoNothing())
{
return(false);
}
}
else
{
oldValue = BindingConstants.UnsetValue;
if (newValue.IsUnsetValueOrDoNothing())
{
return(false);
}
}
ValueAccessorChangingEventArgs args = null;
if (ValueChanging != null)
{
args = RaiseValueChanging(context, penultimateValue, lastMember, oldValue, newValue);
if (args != null)
{
if (args.Cancel)
{
return(false);
}
if (!ReferenceEquals(newValue, args.NewValue))
{
newValue = args.NewValue;
if (newValue.IsUnsetValueOrDoNothing())
{
return(false);
}
}
}
}
if (AutoConvertValue)
{
newValue = BindingServiceProvider.ValueConverter(lastMember.Type, newValue);
}
if (Equals(oldValue, newValue))
{
return(false);
}
if (lastMember.MemberType == BindingMemberType.Event)
{
TryRegisterEvent((BindingMemberValue)oldValue, newValue, context);
RaiseValueChanged(context, penultimateValue, lastMember, oldValue, newValue, args);
}
else
{
if (_closure != null)
{
_closure.Unsubscribe();
}
lastMember.SetValue(penultimateValue, new[] { newValue });
if (ValueChanged != null)
{
RaiseValueChanged(context, penultimateValue, lastMember, oldValue, newValue, args);
}
}
return(true);
}
protected virtual IDataContext GetDataContext(View view, Context context, IAttributeSet attrs)
{
var dataContext = new DataContext();
var strings = ReadStringAttributeValue(context, attrs, Resource.Styleable.Binding, BindingAttrIndex);
if (strings != null && strings.Count != 0)
{
dataContext.Add(ViewFactoryConstants.Bindings, strings);
}
SetAttributeValue(view, context, attrs, Resource.Styleable.ItemsControl,
Resource.Styleable.ItemsControl_ItemTemplate, AttachedMemberConstants.ItemTemplate, dataContext,
ViewFactoryConstants.ItemTemplateId);
SetAttributeValue(view, context, attrs, Resource.Styleable.ItemsControl,
Resource.Styleable.ItemsControl_DropDownItemTemplate, AttachedMemberNames.DropDownItemTemplate,
dataContext,
ViewFactoryConstants.DropDownItemTemplateId);
SetAttributeValue(view, context, attrs, Resource.Styleable.Control,
Resource.Styleable.Control_ContentTemplate, AttachedMemberConstants.ContentTemplate, dataContext,
ViewFactoryConstants.ContentTemplateId);
SetAttributeValue(view, context, attrs, Resource.Styleable.Menu,
Resource.Styleable.Menu_MenuTemplate, AttachedMemberNames.MenuTemplate, dataContext,
ViewFactoryConstants.MenuTemplateId);
SetAttributeValue(view, context, attrs, Resource.Styleable.Menu,
Resource.Styleable.Menu_PopupMenuTemplate, AttachedMemberNames.PopupMenuTemplate, dataContext,
ViewFactoryConstants.PopupMenuTemplateId);
strings = ReadStringAttributeValue(context, attrs, Resource.Styleable.Menu,
new[] { Resource.Styleable.Menu_PopupMenuEvent });
if (strings != null && strings.Count > 0)
{
string eventName = strings[0];
dataContext.Add(ViewFactoryConstants.PopupMenuEvent, eventName);
IBindingMemberInfo member = BindingServiceProvider
.MemberProvider
.GetBindingMember(view.GetType(), AttachedMemberNames.PopupMenuEvent, false, false);
if (member != null)
{
member.SetValue(view, new object[] { eventName });
}
}
strings = ReadStringAttributeValue(context, attrs, Resource.Styleable.Menu,
new[] { Resource.Styleable.Menu_PlacementTargetPath });
if (strings != null && strings.Count > 0)
{
string path = strings[0];
dataContext.Add(ViewFactoryConstants.PlacementTargetPath, path);
IBindingMemberInfo member = BindingServiceProvider
.MemberProvider
.GetBindingMember(view.GetType(), AttachedMemberNames.PlacementTargetPath, false, false);
if (member != null)
{
member.SetValue(view, new object[] { path });
}
}
return(dataContext);
}
public object SetValue(object src, object[] args)
{
return(_member.SetValue(src, BindingReflectionExtensions.InsertFirstArg(args ?? MugenMvvmToolkit.Empty.Array <object>(), _indexes)));
}
private static void SetAdapter(AdapterView item, IAdapter adapter)
{
_rawAdapterMember.SetValue(item, new object[] { adapter });
}
private static void RefreshValue(object target, IBindingMemberInfo member)
{
member.SetValue(target, new[] { member.GetValue(target, null) });
}
