/// <summary>
/// Measure children sizes before arrange children position.
/// </summary>
/// <param name="availableSize"></param>
/// <returns></returns>
protected override Size MeasureOverride(Size constraint)
{
UIElementCollection internalChildren = this.InternalChildren;
double val1_1 = 0.0;
double val1_2 = 0.0;
double val2_1 = 0.0;
double val2_2 = 0.0;
int index = 0;
for (int count = internalChildren.Count; index < count; ++index)
{
UIElement element = internalChildren[index];
if (element != null && element.Visibility != Visibility.Collapsed)
{
Size availableSize = new Size(Math.Max(0.0, constraint.Width - val2_1), Math.Max(0.0, constraint.Height - val2_2));
element.Measure(availableSize);
Size desiredSize = element.DesiredSize;
switch (HierarchicalPanel.GetDock(element))
{
case Dock.Left:
case Dock.Right:
val1_2 = Math.Max(val1_2, val2_2 + desiredSize.Height);
val2_1 += desiredSize.Width;
continue;
case Dock.Top:
case Dock.Bottom:
val1_1 = Math.Max(val1_1, val2_1 + desiredSize.Width);
val2_2 += desiredSize.Height;
continue;
default:
continue;
}
}
}
return(new Size(Math.Max(val1_1, val2_1), Math.Max(val1_2, val2_2)));
}
/// <summary>
/// Arrange children position after measure children size.
/// </summary>
/// <param name="finalSize"></param>
/// <returns></returns>
protected override Size ArrangeOverride(Size arrangeSize)
{
UIElementCollection internalChildren = this.InternalChildren;
int count = internalChildren.Count;
double width = arrangeSize.Width;
double height = arrangeSize.Height;
double highLevelCount = 0;
for (int i = 0; i < count; i++)
{
UIElement element = InternalChildren[i];
if (element != null && element.Visibility != Visibility.Collapsed)
{
Size desiredSize = element.DesiredSize;
DockLevel dockLevel = HierarchicalPanel.GetDockLevel(element);
if (dockLevel == DockLevel.Low)
{
width -= desiredSize.Width;
height -= desiredSize.Height;
}
else
{
highLevelCount++;
}
}
}
double x = 0.0;
double y = 0.0;
double num2 = 0.0;
double num3 = 0.0;
for (int index = 0; index < count; ++index)
{
UIElement element = internalChildren[index];
if (element != null && element.Visibility != Visibility.Collapsed)
{
Size desiredSize = element.DesiredSize;
Rect finalRect = new Rect(x, y, Math.Max(0.0, arrangeSize.Width - (x + num2)), Math.Max(0.0, arrangeSize.Height - (y + num3)));
if (HierarchicalPanel.GetDockLevel(element) == DockLevel.Low)
{
switch (DockPanel.GetDock(element))
{
case Dock.Left:
x += desiredSize.Width;
finalRect.Width = desiredSize.Width;
break;
case Dock.Top:
y += desiredSize.Height;
finalRect.Height = desiredSize.Height;
break;
case Dock.Right:
num2 += desiredSize.Width;
finalRect.X = Math.Max(0.0, arrangeSize.Width - num2);
finalRect.Width = desiredSize.Width;
break;
case Dock.Bottom:
num3 += desiredSize.Height;
finalRect.Y = Math.Max(0.0, arrangeSize.Height - num3);
finalRect.Height = desiredSize.Height;
break;
}
}
else
{
switch (DockPanel.GetDock(element))
{
case Dock.Left:
x += width / highLevelCount;
finalRect.Width = width / highLevelCount;
break;
case Dock.Top:
y += height / highLevelCount;
finalRect.Height = height / highLevelCount;
break;
case Dock.Right:
num2 += width / highLevelCount;
finalRect.X = Math.Max(0.0, arrangeSize.Width - num2);
finalRect.Width = desiredSize.Width;
break;
case Dock.Bottom:
num3 += height / highLevelCount;
finalRect.Y = Math.Max(0.0, arrangeSize.Height - num3);
finalRect.Height = desiredSize.Height;
break;
}
}
element.Arrange(finalRect);
}
}
return(arrangeSize);
}