/// <summary>
/// When overridden in a derived class, positions child elements and determines a size for a <see cref="T:System.Windows.FrameworkElement" /> derived class.
/// </summary>
/// <param name="finalSize">The final area within the parent that this element should use to arrange itself and its children.</param>
/// <returns>The actual size used.</returns>
protected override Size ArrangeOverride(Size finalSize)
{
foreach (UIElement element in Children)
{
if (SimpleView.GetUIElementType(element) == UIElementTypes.Primary)
{
if (CanCollapseSecondary && IsSecondaryElementCollapsed)
{
var minimumCollapsedWidth = 0d;
var mainAreaLeft = 0d;
if (HeaderRenderer != null)
{
minimumCollapsedWidth = HeaderRenderer.GetMinimumCollapsedAreaWidth(this);
if (SecondaryAreaLocation == SecondaryAreaLocation.Left)
{
mainAreaLeft = minimumCollapsedWidth + (minimumCollapsedWidth > 0d ? ElementSpacing : 0d);
}
}
var primaryArea = new Rect(mainAreaLeft, 0d, finalSize.Width - minimumCollapsedWidth - (minimumCollapsedWidth > 0d ? ElementSpacing : 0d), finalSize.Height);
if (HeaderRenderer != null)
{
primaryArea = HeaderRenderer.GetPrimaryClientArea(primaryArea, this);
}
_currentPrimaryArea = primaryArea;
element.Arrange(primaryArea);
}
else
{
var currentX = 0d;
if (SecondaryAreaLocation == SecondaryAreaLocation.Left)
{
currentX = SecondaryElementWidth + ElementSpacing;
}
var primaryArea = new Rect(currentX, 0d, Math.Max(finalSize.Width - SecondaryElementWidth - ElementSpacing, 0), finalSize.Height);
if (HeaderRenderer != null)
{
primaryArea = HeaderRenderer.GetPrimaryClientArea(primaryArea, this);
}
_currentPrimaryArea = primaryArea;
element.Arrange(primaryArea);
}
}
else
{
if (CanCollapseSecondary && IsSecondaryElementCollapsed)
{
_currentSecondaryArea = new Rect(-100000d, -100000d, 0d, finalSize.Height);
element.Arrange(_currentSecondaryArea);
}
else
{
var secondaryArea = SecondaryAreaLocation == SecondaryAreaLocation.Left ? new Rect(0d, 0d, SecondaryElementWidth, finalSize.Height) : new Rect(finalSize.Width - SecondaryElementWidth, 0d, SecondaryElementWidth, finalSize.Height);
if (HeaderRenderer != null)
{
secondaryArea = HeaderRenderer.GetSecondaryClientArea(secondaryArea, this);
}
_currentSecondaryArea = secondaryArea;
element.Arrange(secondaryArea);
}
}
}
return(base.ArrangeOverride(finalSize));
}
/// <summary>
/// When overridden in a derived class, measures the size in layout required for child elements and determines a size for the <see cref="T:System.Windows.FrameworkElement" />-derived class.
/// </summary>
/// <param name="availableSize">The available size that this element can give to child elements. Infinity can be specified as a value to indicate that the element will size to whatever content is available.</param>
/// <returns>The size that this element determines it needs during layout, based on its calculations of child element sizes.</returns>
protected override Size MeasureOverride(Size availableSize)
{
if (HeaderRenderer == null)
{
HeaderRenderer = new StandardPrimarySecondaryHorizontalPanelHeaderRenderer();
}
foreach (UIElement element in Children)
{
if (SimpleView.GetUIElementType(element) == UIElementTypes.Primary)
{
if (CanCollapseSecondary && IsSecondaryElementCollapsed)
{
var minimumCollapsedWidth = 0d;
var mainAreaLeft = 0d;
if (HeaderRenderer != null)
{
minimumCollapsedWidth = HeaderRenderer.GetMinimumCollapsedAreaWidth(this);
if (SecondaryAreaLocation == SecondaryAreaLocation.Left)
{
mainAreaLeft = minimumCollapsedWidth + (minimumCollapsedWidth > 0d ? ElementSpacing : 0d);
}
}
var primaryArea = new Rect(mainAreaLeft, 0d, availableSize.Width - minimumCollapsedWidth - (minimumCollapsedWidth > 0d ? ElementSpacing : 0d), availableSize.Height);
if (HeaderRenderer != null)
{
primaryArea = HeaderRenderer.GetPrimaryClientArea(primaryArea, this);
}
element.Measure(primaryArea.Size);
}
else
{
var currentX = 0d;
if (SecondaryAreaLocation == SecondaryAreaLocation.Left)
{
currentX = SecondaryElementWidth + ElementSpacing;
}
var primaryArea = new Rect(currentX, 0d, Math.Max(availableSize.Width - SecondaryElementWidth - ElementSpacing, 0), availableSize.Height);
if (HeaderRenderer != null)
{
primaryArea = HeaderRenderer.GetPrimaryClientArea(primaryArea, this);
}
element.Measure(primaryArea.Size);
}
}
else
{
if (CanCollapseSecondary && IsSecondaryElementCollapsed)
{
element.Measure(new Size(0, availableSize.Height));
}
else
{
var secondaryArea = SecondaryAreaLocation == SecondaryAreaLocation.Left ? new Rect(0d, 0d, SecondaryElementWidth, availableSize.Height) : new Rect(availableSize.Width - SecondaryElementWidth, 0d, SecondaryElementWidth, availableSize.Height);
if (HeaderRenderer != null)
{
secondaryArea = HeaderRenderer.GetSecondaryClientArea(secondaryArea, this);
}
element.Measure(secondaryArea.Size);
}
}
}
return(base.MeasureOverride(availableSize));
}