/// <summary>
/// Tries the get information about a currently attached component.
/// </summary>
private bool TryGetAttachedComponent(
SceneComponentBase component, ViewInformation?correspondingView,
out SceneComponentInfo componentInfo, out int componentIndex)
{
var attachedComponentCount = _attachedComponents.Count;
for (var loop = 0; loop < attachedComponentCount; loop++)
{
if (component.IsViewSpecific)
{
if (component == _attachedComponents[loop].Component &&
correspondingView != null &&
correspondingView == _attachedComponents[loop].CorrespondingView)
{
componentInfo = _attachedComponents[loop];
componentIndex = loop;
return(true);
}
}
else
{
if (component == _attachedComponents[loop].Component)
{
componentInfo = _attachedComponents[loop];
componentIndex = loop;
return(true);
}
}
}
componentInfo = default;
componentIndex = -1;
return(false);
}
/// <summary>
/// Internal method for updating all scene components.
/// </summary>
/// <param name="updateState">Current update state.</param>
internal void UpdateSceneComponents(SceneRelatedUpdateState updateState)
{
// Update all components
var attachedComponentsCount = _attachedComponents.Count;
for (var loop = 0; loop < attachedComponentsCount; loop++)
{
_attachedComponents[loop].Component.UpdateInternal(
updateState,
_attachedComponents[loop].CorrespondingView,
_attachedComponents[loop].Context);
}
// Attach all components which are coming in
while (_componentRequests.TryDequeue(out var actRequest))
{
SceneComponentInfo actComponent;
int actComponentIndex;
switch (actRequest.RequestType)
{
case SceneComponentRequestType.Attach:
if (actRequest.Component == null)
{
continue;
}
if (this.TryGetAttachedComponent(
actRequest.Component, actRequest.CorrespondingView,
out actComponent, out actComponentIndex))
{
// We've already attached this component, so skip this request
continue;
}
// Trigger removing of all components with the same group like the new one
// (new components replace old components with same group name)
if (!string.IsNullOrEmpty(actRequest.Component.ComponentGroup))
{
foreach (var actObsoleteComponent in this.GetExistingComponentsByGroup(
actRequest.Component.ComponentGroup,
actRequest.Component.IsViewSpecific ? actRequest.CorrespondingView : null))
{
_componentRequests.Enqueue(new SceneComponentRequest
{
RequestType = SceneComponentRequestType.Detach,
Component = actObsoleteComponent.Component,
CorrespondingView = actObsoleteComponent.CorrespondingView
});
}
}
var actManipulator = new SceneManipulator(_owner);
actManipulator.IsValid = true;
try
{
var newRegisteredComponentInfo = new SceneComponentInfo
{
Component = actRequest.Component,
CorrespondingView = actRequest.CorrespondingView,
Context = actRequest.Component.AttachInternal(
actManipulator, actRequest.CorrespondingView)
};
// Register the component on local list of attached ones
_attachedComponents.Add(newRegisteredComponentInfo);
}
finally
{
actManipulator.IsValid = false;
}
break;
case SceneComponentRequestType.Detach:
if (actRequest.Component == null)
{
continue;
}
if (!this.TryGetAttachedComponent(
actRequest.Component, actRequest.CorrespondingView,
out actComponent, out actComponentIndex))
{
// We don't have any component that is like the requested one
continue;
}
actManipulator = new SceneManipulator(_owner);
actManipulator.IsValid = true;
try
{
actComponent.Component.DetachInternal(
actManipulator, actComponent.CorrespondingView, actComponent.Context);
// RemoveObject the component
_attachedComponents.RemoveAt(actComponentIndex);
}
finally
{
actManipulator.IsValid = false;
}
break;
case SceneComponentRequestType.DetachAll:
while (_attachedComponents.Count > 0)
{
actManipulator = new SceneManipulator(_owner)
{
IsValid = true
};
try
{
actComponent = _attachedComponents[0];
actComponent.Component.DetachInternal(
actManipulator, actComponent.CorrespondingView, actComponent.Context);
// RemoveObject the component
_attachedComponents.RemoveAt(0);
}
finally
{
actManipulator.IsValid = false;
}
}
break;
default:
throw new SeeingSharpException($"Unknown {nameof(SceneComponentRequestType)}: {actRequest.RequestType}");
}
}
}
