protected override bool GetInsertionInfo(SceneElement container, int insertionIndex, bool isCursorAtEnd, out Point position, out double length, out Orientation orientation)
{
position = new Point();
length = 0.0;
orientation = Orientation.Horizontal;
IViewPanel viewPanel = MoveStrategy.GetContainerHost(container) as IViewPanel;
if (container == null || viewPanel == null)
{
return(false);
}
orientation = viewPanel.Orientation;
if (viewPanel.ChildrenCount == 0)
{
position = new Point(0.0, 0.0);
length = orientation == Orientation.Horizontal ? viewPanel.RenderSize.Height : viewPanel.RenderSize.Width;
return(true);
}
List <FlowPanelLayoutUtilities.LineInfo> lines = FlowPanelLayoutUtilities.ExtractLines(container);
if (lines.Count <= 0)
{
return(false);
}
FlowPanelLayoutUtilities.LineInfo lineInfo1 = (FlowPanelLayoutUtilities.LineInfo)null;
IViewVisual index = (IViewVisual)null;
ActualBoundsInParent actualBoundsInParent = new ActualBoundsInParent(container);
foreach (FlowPanelLayoutUtilities.LineInfo lineInfo2 in lines)
{
if (lineInfo2.EndElementIndex == insertionIndex - 1 && isCursorAtEnd && insertionIndex < viewPanel.ChildrenCount)
{
index = viewPanel.GetChild(lineInfo2.EndElementIndex);
lineInfo1 = lineInfo2;
length = lineInfo2.LineLength;
break;
}
if (lineInfo2.StartElementIndex <= insertionIndex && insertionIndex <= lineInfo2.EndElementIndex)
{
index = viewPanel.GetChild(insertionIndex);
lineInfo1 = lineInfo2;
length = lineInfo2.LineLength;
break;
}
}
Matrix matrixFromTransform = VectorUtilities.GetMatrixFromTransform(this.AdornerSet.ViewModel.DefaultView.ComputeTransformToVisual((IViewObject)viewPanel, this.Element.Visual));
Point point = new Point(matrixFromTransform.OffsetX, matrixFromTransform.OffsetY);
if (index != null && lineInfo1 != null)
{
Rect rect = actualBoundsInParent[index];
switch (orientation)
{
case Orientation.Horizontal:
double num1 = isCursorAtEnd ? rect.Right : rect.Left;
position = new Point(num1 + point.X, lineInfo1.StartPoint.Y + point.Y);
break;
case Orientation.Vertical:
double num2 = isCursorAtEnd ? rect.Bottom : rect.Top;
position = new Point(lineInfo1.StartPoint.X + point.X, num2 + point.Y);
break;
default:
throw new NotImplementedException(ExceptionStringTable.StackPanelUnrecognizedOrientation);
}
return(true);
}
FlowPanelLayoutUtilities.LineInfo lineInfo3 = lines[lines.Count - 1];
if (insertionIndex <= lineInfo3.EndElementIndex)
{
return(false);
}
IViewVisual child = viewPanel.GetChild(lineInfo3.EndElementIndex);
Rect rect1 = actualBoundsInParent[child];
switch (orientation)
{
case Orientation.Horizontal:
position = new Point(rect1.Right + point.X, lineInfo3.StartPoint.Y + point.Y);
break;
case Orientation.Vertical:
position = new Point(lineInfo3.StartPoint.X + point.X, rect1.Bottom + point.Y);
break;
default:
throw new NotImplementedException(ExceptionStringTable.StackPanelUnrecognizedOrientation);
}
length = lineInfo3.LineLength;
return(true);
}
public static int GetInsertionIndex(SceneElement container, Point position, out bool isCursorAtEnd)
{
isCursorAtEnd = false;
IViewPanel viewPanel = MoveStrategy.GetContainerHost(container) as IViewPanel;
if (viewPanel == null)
{
return(0);
}
Orientation orientation = viewPanel.Orientation;
if (viewPanel.ChildrenCount == 0)
{
return(0);
}
bool flag = PlatformTypes.StackPanel.IsAssignableFrom((ITypeId)container.Type) || PlatformTypes.VirtualizingStackPanel.IsAssignableFrom((ITypeId)container.Type);
ActualBoundsInParent actualBoundsInParent = new ActualBoundsInParent(container);
foreach (FlowPanelLayoutUtilities.LineInfo line in FlowPanelLayoutUtilities.ExtractLines(container))
{
if (flag || FlowPanelLayoutUtilities.IsPointInLine(position, line, orientation))
{
if (line.StartElementIndex == line.EndElementIndex)
{
IViewVisual child = viewPanel.GetChild(line.StartElementIndex);
Rect elementLayoutBounds = actualBoundsInParent[child];
if (FlowPanelLayoutUtilities.DoesPointLieBeforeElement(position, elementLayoutBounds, orientation))
{
isCursorAtEnd = false;
return(line.StartElementIndex);
}
isCursorAtEnd = true;
return(line.StartElementIndex + 1);
}
IViewVisual child1 = viewPanel.GetChild(line.StartElementIndex);
IViewVisual child2 = viewPanel.GetChild(line.EndElementIndex);
Rect elementLayoutBounds1 = actualBoundsInParent[child1];
Rect elementLayoutBounds2 = actualBoundsInParent[child2];
if (FlowPanelLayoutUtilities.DoesPointLieBeforeElement(position, elementLayoutBounds1, orientation))
{
isCursorAtEnd = false;
return(line.StartElementIndex);
}
if (FlowPanelLayoutUtilities.DoesPointLieAfterElement(position, elementLayoutBounds2, orientation))
{
isCursorAtEnd = true;
return(line.EndElementIndex + 1);
}
for (int startElementIndex = line.StartElementIndex; startElementIndex < line.EndElementIndex; ++startElementIndex)
{
IViewVisual child3 = viewPanel.GetChild(startElementIndex);
IViewVisual child4 = viewPanel.GetChild(startElementIndex + 1);
Rect currentElementLayoutBounds = actualBoundsInParent[child3];
Rect nextElementLayoutBounds = actualBoundsInParent[child4];
if (FlowPanelLayoutUtilities.DoesPointLieBetweenElements(position, currentElementLayoutBounds, nextElementLayoutBounds, orientation))
{
return(startElementIndex + 1);
}
}
break;
}
}
if (flag)
{
return(-1);
}
isCursorAtEnd = true;
return(viewPanel.ChildrenCount);
}