Size GetSize(DockPosition p_dock, RelativeSizes p_relativeSizes, Size p_parentSize, Size p_draggedSize)
{
Size size = base.RenderSize;
if (p_dock != DockPosition.Center)
{
bool isDockHor = (p_dock == DockPosition.Left) || (p_dock == DockPosition.Right);
bool isParentHor = OwnWinItem.Orientation == Orientation.Horizontal;
bool findHorizontal = isParentHor == (isDockHor == isParentHor);
double length = 0.0;
if (isDockHor != isParentHor)
{
double relativeSizeSum = TabItemPanel.GetLength(this, isDockHor) + GetLength(p_draggedSize, isDockHor);
p_relativeSizes = GetRelativeSizesSum(relativeSizeSum);
}
length = GetRenderLength(
0.0,
GetLength(p_draggedSize, findHorizontal),
GetLength(p_parentSize, findHorizontal),
p_relativeSizes);
if (findHorizontal)
{
size.Width = length;
return(size);
}
size.Height = length;
}
return(size);
}
/// <summary>
/// 拖拽过程中计算在当前Tabs中的可停靠区域
/// </summary>
/// <param name="p_dockPos"></param>
/// <param name="p_dockItem"></param>
/// <returns></returns>
internal Rect GetRectDimenstion(DockPosition p_dockPos, Pane p_dockItem)
{
Point topLeft = new Point();
Size parentSize = Size.Empty;
Size size = new Size(0.0, 0.0);
bool isHor = false;
if (OwnWinItem != null)
{
parentSize = OwnWinItem.RenderSize;
isHor = OwnWinItem.Orientation == Orientation.Horizontal;
RelativeSizes sumOfSizes = OwnWinItem.GetSumOfRelativeSizes();
if (isHor)
{
sumOfSizes.LengthSum += p_dockItem.InitWidth;
sumOfSizes.WithoutChange += p_dockItem.InitWidth;
size.Width = sumOfSizes.LengthSum;
}
else
{
sumOfSizes.LengthSum += p_dockItem.InitHeight;
sumOfSizes.WithoutChange += p_dockItem.InitHeight;
size.Height = sumOfSizes.LengthSum;
}
size = GetSize(p_dockPos, sumOfSizes, parentSize, new Size(p_dockItem.InitWidth, p_dockItem.InitHeight));
topLeft = GetTopLeft(p_dockPos, sumOfSizes, parentSize, size);
}
return(new Rect(topLeft, size));
}
Point GetTopLeft(DockPosition dock, RelativeSizes relativeSizes, Size parentRenderSize, Size draggedElementRenderSize)
{
Point topLeft = new Point();
bool shouldTransform = true;
if (dock != DockPosition.Center)
{
int index = OwnWinItem.Items.IndexOf(this);
if ((dock == DockPosition.Right) || (dock == DockPosition.Bottom))
{
index++;
}
bool isDockHor = (dock == DockPosition.Left) || (dock == DockPosition.Right);
bool isParentHor = OwnWinItem.Orientation == Orientation.Horizontal;
double length = 0.0;
if (isParentHor != isDockHor)
{
if ((dock == DockPosition.Right) || (dock == DockPosition.Bottom))
{
length = GetLength(parentRenderSize, isDockHor) - GetLength(draggedElementRenderSize, isDockHor);
}
}
else
{
for (int i = 0; i < index; i++)
{
FrameworkElement element = OwnWinItem.Items[i] as FrameworkElement;
if (element.Visibility == Visibility.Visible)
{
length += GetRenderLength(
TabItemPanel.GetSplitterChange(element),
TabItemPanel.GetLength(element, isParentHor),
GetLength(parentRenderSize, isParentHor),
relativeSizes);
}
}
shouldTransform = false;
}
if (isParentHor == (isDockHor == isParentHor))
{
topLeft.X = length;
}
else
{
topLeft.Y = length;
}
}
if (shouldTransform)
{
return(base.TransformToVisual(OwnWinItem).TransformPoint(topLeft));
}
UIElement firstChild = OwnWinItem.Items[0] as UIElement;
return(firstChild.TransformToVisual(OwnWinItem).TransformPoint(topLeft));
}
static RelativeSizes GetRelativeSizesSum(double sum)
{
RelativeSizes rs = new RelativeSizes();
rs.ChangesSum = 0.0;
rs.LengthSum = sum;
rs.WithChangeSet = 0.0;
rs.WithoutChange = sum;
return(rs);
}
static double GetRenderLength(double splitterChange, double p_length, double p_availableLength, RelativeSizes relativeSizes)
{
if (splitterChange == 0.0)
{
return(p_length * (p_availableLength / (relativeSizes.WithoutChange + relativeSizes.WithChangeSet)));
}
return(((splitterChange * relativeSizes.WithChangeSet) / relativeSizes.ChangesSum) * (p_availableLength / (relativeSizes.WithoutChange + relativeSizes.WithChangeSet)));
}
