public QGBindingLayer(IQGControl parentControl)
{
this.ChildControls = new QGControlCollection(this);
this.ParentControl = parentControl;
this.ParentControl.RegisterControlInitMethod(c => __initialize(this.ParentControl.WPFPrimaryElement));
}
private void __UpdateLayerBoundaries(IQGControl control)
{
this.RightmostControl ??= control;
this.BottommostControl ??= control;
double elXedge = control.GetRightEdge();
double elYedge = control.GetBottomEdge();
if (elXedge > _rightEdge)
{
this.RightmostControl = control;
_rightEdge = elXedge;
}
else if (elXedge < _rightEdge && this.RightmostControl == control)
{
this.RightmostControl = __selectControl(this.ChildControls, (c1, c2) => c1.GetRightEdge() > c2.GetRightEdge() ? c1 : c2);
_rightEdge = this.RightmostControl.GetRightEdge();
}
if (elYedge > _bottomEdge)
{
this.BottommostControl = control;
_bottomEdge = elYedge;
}
else if (elYedge < _bottomEdge && this.BottommostControl == control)
{
this.BottommostControl = __selectControl(this.ChildControls, (c1, c2) => c1.GetBottomEdge() > c2.GetBottomEdge() ? c1 : c2);
_bottomEdge = this.BottommostControl.GetBottomEdge();
}
if (this.Width != _rightEdge || this.Height != _bottomEdge)
{
this.SetSize(_rightEdge, _bottomEdge);
}
}
private void __registerParent(IQGControl sender)
{
if (this.ParentLayer == null && this.Vertex1.IsInitialized && this.Vertex2.IsInitialized)
{
IQGLayer.FindNearestCommonLayer(this.Vertex1, this.Vertex2).ChildControls.Add(this);
}
}
private void __initializeWPFElement(object caller, UIElement wpfElement)
{
IQGControl control = (IQGControl)caller;
QGControlAdorner adorner = this.ControlAdorners[control];
adorner.AdornerVisualCollection.Add(wpfElement);
}
private void __UpdateBoundariesAfterElementRemoval(IQGControl control)
{
if (this.RightmostControl == control)
{
this.RightmostControl = __selectControl(this.ChildControls, (c1, c2) => c1.GetRightEdge() > c2.GetRightEdge() ? c1 : c2);
_rightEdge = this.RightmostControl?.GetRightEdge() ?? 0;
}
if (this.BottommostControl == control)
{
this.BottommostControl = __selectControl(this.ChildControls, (c1, c2) => c1.GetBottomEdge() > c2.GetBottomEdge() ? c1 : c2);
_bottomEdge = this.BottommostControl?.GetBottomEdge() ?? 0;
}
}
void IQGLayer.OnRemovingControl(IQGControl control)
{
if (!this.ControlAdorners.ContainsKey(control))
{
throw new Exception("Cannot remove control from binding layer: it is not present within the layer.");
}
control.SetParentLayer(null);
QGControlAdorner adorner = this.ControlAdorners[control];
this.ControlAdorners.Remove(control);
this.WPFAdornerLayer?.Remove(adorner);
this.OnRemovingControl(control);
}
private IQGControl __selectControl(IEnumerable <IQGControl> controls, Func <IQGControl, IQGControl, IQGControl> selector)
{
if (controls == null || !controls.Any())
{
return(null);
}
IQGControl currentSelection = controls.First();
foreach (IQGControl item in controls)
{
currentSelection = selector(currentSelection, item);
}
return(currentSelection);
}
void IQGLayer.OnAddingControl(IQGControl control)
{
control.SetParentLayer(this);
QGControlAdorner adorner = new QGControlAdorner(this.ParentControl);
this.ControlAdorners.Add(control, adorner);
this.WPFAdornerLayer?.Add(adorner);
if (control is IWPFContainer wpfContainer)
{
wpfContainer.RegisterWPFElementInitMethod(__initializeWPFElement);
}
this.UpdateControlPosition(control);
this.OnAddingControl(control);
}
public void UpdateControlPosition(IQGControl child)
{
if (!this.ChildControls.Contains(child))
{
throw new Exception("Cannot update control position: control is not a child of the calling layer.");
}
Point wpfControlPoint = ((IQGLayer)this).GetRenderingCoordinatesOf(child.Position);
foreach (WPFElementInfo elementInfo in child.WPFElementInfoEnumeration)
{
Point wpfRenderPoint = wpfControlPoint + child.GetAlignmentOffset(elementInfo.Size) + elementInfo.PositionOffset;
Rect wpfDimensions = new Rect(wpfRenderPoint, elementInfo.Size);
if (!Double.IsFinite(elementInfo.Size.Width) || !Double.IsFinite(elementInfo.Size.Height))
{
break;
}
elementInfo.UIElement.Arrange(wpfDimensions);
}
}
public static double GetBottomEdge(this IQGControl control)
{
return(control.Y + (control.RenderSize.Height + control.GetAlignmentOffset().Y));
}
protected override void OnRemovingControl(IQGControl control)
{
control.PositionChange -= __updateControlOnMove;
control.SizeChange -= __updateControlOnResize;
__UpdateBoundariesAfterElementRemoval(control);
}
protected override void OnAddingControl(IQGControl control)
{
__UpdateLayerBoundaries(control);
control.PositionChange += __updateControlOnMove;
control.SizeChange += __updateControlOnResize;
}
public static double GetRightEdge(this IQGControl control)
{
return(control.X + (control.RenderSize.Width + control.GetAlignmentOffset().X));
}
protected virtual void OnRemovingControl(IQGControl control)
{
}
public QGControlAdorner(IQGControl parentControl)
: base(parentControl.WPFPrimaryElement)
{
this.ParentControl = parentControl;
this.AdornerVisualCollection = new VisualCollection(this);
}
protected virtual void OnAddingControl(IQGControl control)
{
}
void IQGLayer.UpdateControlPosition(IQGControl child) => this.UpdateControlPosition(child);
void IQGLayer.UpdateControlSize(IQGControl child)
{
this.UpdateControlPosition(child);
}
