|
public TargetChildren ( string layoutId, |
||
| layoutId | string | Identifier of the layout to be used. |
| metaPanel | Reference to owning panel instance. | |
| stateDict | MetaElementStateDict | Dictionary of per-element state. |
| elements | ICollection | Collection of elements to be arranged. |
| finalSize | Size that layout should use to arrange child elements. | |
| return | void | |
public override void TargetChildren(string layoutId,
MetaPanelBase metaPanel,
MetaElementStateDict stateDict,
ICollection elements,
Size finalSize)
{
// Only apply if we match the incoming layout identifier
if (string.IsNullOrEmpty(Id) || Id.Equals(layoutId))
{
double x = 0.0;
double y = 0.0;
double right = 0.0;
double bottom = 0.0;
// If using LastChildFill then the last element takes up all the remainder space
int lastDockElement = (LastChildFill ? _validCount - 1 : _validCount);
// Calculate the target rectangle for each element
int i = 0;
foreach (UIElement element in elements)
{
// We ignore items being removed
if (stateDict[element].Status != MetaElementStatus.Removing)
{
// Calculate the maximum possible rect for the element
Rect newTargetRect = new Rect(x, y,
Math.Max(0.0, (double)(finalSize.Width - (x + right))),
Math.Max(0.0, (double)(finalSize.Height - (y + bottom))));
if (i < lastDockElement)
{
// Constrain target rect by the dock edge
Size desiredSize = element.DesiredSize;
switch (GetDock(element))
{
case Dock.Left:
x += desiredSize.Width;
newTargetRect.Width = desiredSize.Width;
break;
case Dock.Top:
y += desiredSize.Height;
newTargetRect.Height = desiredSize.Height;
break;
case Dock.Right:
right += desiredSize.Width;
newTargetRect.X = Math.Max(0.0, (double)(finalSize.Width - right));
newTargetRect.Width = desiredSize.Width;
break;
case Dock.Bottom:
bottom += desiredSize.Height;
newTargetRect.Y = Math.Max(0.0, (double)(finalSize.Height - bottom));
newTargetRect.Height = desiredSize.Height;
break;
}
}
// Store the new target rectangle
if (!stateDict[element].TargetRect.Equals(newTargetRect))
{
stateDict[element].TargetChanged = true;
stateDict[element].TargetRect = newTargetRect;
}
i++;
}
}
}
}
#endregion