public RootVisual(CoreServices coreServices)
{
_coreServices = coreServices ?? throw new System.ArgumentNullException(nameof(coreServices));
//Uno specific - flag as VisualTreeRoot for interop with existing logic
IsVisualTreeRoot = true;
PointerPressed += RootVisual_PointerPressed;
PointerReleased += RootVisual_PointerReleased;
PointerCanceled += RootVisual_PointerCanceled;
}
public RootVisual(CoreServices coreServices)
{
_coreServices = coreServices ?? throw new System.ArgumentNullException(nameof(coreServices));
//Uno specific - flag as VisualTreeRoot for interop with existing logic
IsVisualTreeRoot = true;
#if __WASM__
//Uno WASM specific - set tabindex to 0 so the RootVisual is "native focusable"
SetAttribute("tabindex", "0");
#endif
#if HAS_UNO
AddHandler(
PointerReleasedEvent,
new PointerEventHandler((snd, args) => ProcessPointerUp(args)),
handledEventsToo: true);
#endif
}
public ContentRoot(ContentRootType type, Color backgroundColor, UIElement?rootElement, CoreServices coreServices)
{
//TODO Uno: Does not match WinUI exactly, additional logic can be ported later.
_coreServices = coreServices ?? throw new ArgumentNullException(nameof(coreServices));
VisualTree = new VisualTree(coreServices, backgroundColor, rootElement, this);
FocusManager = new FocusManager(this);
InputManager = new InputManager(this);
//TODO Uno: We may want to create a custom version of adapter and observer specific to Uno.
FocusAdapter = new FocusAdapter(this);
FocusManager.SetFocusObserver(new FocusObserver(this));
switch (type)
{
case ContentRootType.CoreWindow:
MUX_ASSERT(coreServices.ContentRootCoordinator.CoreWindowContentRoot == null);
coreServices.ContentRootCoordinator.CoreWindowContentRoot = this;
break;
}
}
public VisualTree(CoreServices coreServices, Color backgroundColor, UIElement?rootElement, ContentRoot contentRoot)
{
//TODO Uno: Adjust to match WinUI
_coreServices = coreServices ?? throw new ArgumentNullException(nameof(coreServices));
ContentRoot = contentRoot ?? throw new ArgumentNullException(nameof(contentRoot));
if (rootElement != null)
{
RootElement = rootElement;
}
else
{
RootVisual = new RootVisual(coreServices);
RootVisual.AssociatedVisualTree = this;
RootVisual.SetBackgroundColor(backgroundColor);
RootElement = RootVisual;
_focusInputHandler = new UnoFocusInputHandler(RootVisual);
}
}
private void GetNodeByValue(
object value,
DependencyObject parent,
Uno.UI.Xaml.Core.CoreServices core,
out RPNode ppNode)
{
// Here we will have either a valueString which corresponds to the name
// of the element we are looking for, or a valueObject of type UIElement
// which is a direct reference to said element.
if (value is string)
{
string name = null;
if (value is string valueString)
{
name = valueString;
}
if (!string.IsNullOrEmpty(name))
{
foreach (RPNode node in m_nodes)
{
if (name.Equals(node.GetName()))
{
ppNode = node;
return;
}
}
// If there is no match within the children, the target might
// actually be a deferred element. If that's the case, we will
// create a node for this deferred element and inject it into
// the graph.
// TODO Uno: We don't support a concept of deferred elements yet.
//var deferredElement = core.GetDeferredElementIfExists(name, namescopeOwner, nameScopeType);
//if (deferredElement && deferredElement.GetParent() == parent)
//{
// *ppNode = &(*m_nodes.emplace_after(it, deferredElement));
// return S_OK;
//}
// If there is truly no matching node in the end, then we must
// throw an InvalidOperationException. We will fail fast here
// and let the CRelativePanel handle the rest.
throw new InvalidOperationException("No matching node found");
}
}
else
{
UIElement valueAsUIElement = null;
if (value is UIElement)
{
valueAsUIElement = value as UIElement;
}
else if (value is ElementNameSubject elementNameSubject) // TODO Uno specific: We get ElementNameSubject instead of string here
{
valueAsUIElement = elementNameSubject.ElementInstance as UIElement;
}
if (valueAsUIElement != null)
{
foreach (RPNode node in m_nodes)
{
if (node.GetElement() == valueAsUIElement)
{
ppNode = node;
return;
}
}
// If there is no match, we must throw an InvalidOperationException.
// We will fail fast here and let the CRelativePanel handle the rest.
throw new InvalidOperationException("Node reference not found");
}
}
ppNode = null;
return;
}
internal void ResolveConstraints(
DependencyObject parent,
Uno.UI.Xaml.Core.CoreServices core)
{
foreach (var node in m_nodes)
{
object value;
node.GetLeftOfValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var leftOfNode);
node.SetLeftOfConstraint(leftOfNode);
}
node.GetAboveValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var aboveNode);
node.SetAboveConstraint(aboveNode);
}
node.GetRightOfValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var rightOfNode);
node.SetRightOfConstraint(rightOfNode);
}
node.GetBelowValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var belowNode);
node.SetBelowConstraint(belowNode);
}
node.GetAlignHorizontalCenterWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignHorizontalCenterWithNode);
node.SetAlignHorizontalCenterWithConstraint(alignHorizontalCenterWithNode);
}
node.GetAlignVerticalCenterWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignVerticalCenterWithNode);
node.SetAlignVerticalCenterWithConstraint(alignVerticalCenterWithNode);
}
node.GetAlignLeftWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignLeftWithNode);
node.SetAlignLeftWithConstraint(alignLeftWithNode);
}
node.GetAlignTopWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignTopWithNode);
node.SetAlignTopWithConstraint(alignTopWithNode);
}
node.GetAlignRightWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignRightWithNode);
node.SetAlignRightWithConstraint(alignRightWithNode);
}
node.GetAlignBottomWithValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
GetNodeByValue(value, parent, core, out var alignBottomWithNode);
node.SetAlignBottomWithConstraint(alignBottomWithNode);
}
node.GetAlignLeftWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignLeftWithPanelConstraint((bool)value);
}
node.GetAlignTopWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignTopWithPanelConstraint((bool)value);
}
node.GetAlignRightWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignRightWithPanelConstraint((bool)value);
}
node.GetAlignBottomWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignBottomWithPanelConstraint((bool)value);
}
node.GetAlignHorizontalCenterWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignHorizontalCenterWithPanelConstraint((bool)value);
}
node.GetAlignVerticalCenterWithPanelValue(out value);
if (value != null && value != DependencyProperty.UnsetValue)
{
node.SetAlignVerticalCenterWithPanelConstraint((bool)value);
}
}
}
public ContentRootCoordinator(CoreServices coreServices)
{
_coreServices = coreServices ?? throw new ArgumentNullException(nameof(coreServices));
}