/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
public override Size GetPreferredSize(ViewLayoutContext context)
{
// Clear down the preferred size caches
switch (_currentSize)
{
case GroupItemSize.Small:
_smallCache.Clear();
_smallWidest = 0;
break;
case GroupItemSize.Medium:
_mediumCache.Clear();
_mediumWidest = 0;
break;
case GroupItemSize.Large:
_largeCache.Clear();
break;
}
// Sync child elements to the current group items
SyncChildrenToRibbonGroupItems();
Size preferredSize = Size.Empty;
// Are we sizing horizontal or vertical?
bool horizontal = (_currentSize == GroupItemSize.Large);
// Find total width and maximum height across all child elements
for (int i = 0; i < this.Count; i++)
{
ViewBase child = this[i];
// Only interested in visible items
if (child.Visible)
{
// Cache preferred size of the child
Size childSize = child.GetPreferredSize(context);
// Add into the size cache for use in layout code
switch (_currentSize)
{
case GroupItemSize.Small:
_smallCache.Add(child, childSize);
_smallWidest = Math.Max(_smallWidest, childSize.Width);
break;
case GroupItemSize.Medium:
_mediumCache.Add(child, childSize);
_mediumWidest = Math.Max(_mediumWidest, childSize.Width);
break;
case GroupItemSize.Large:
_largeCache.Add(child, childSize);
break;
}
if (horizontal)
{
// If not the first item positioned
if (preferredSize.Width > 0)
{
// Add on a single pixel spacing gap
preferredSize.Width++;
}
// Always add on to the width
preferredSize.Width += childSize.Width;
// Find maximum height encountered
preferredSize.Height = Math.Max(preferredSize.Height, childSize.Height);
}
else
{
// Always add on to the width
preferredSize.Height += childSize.Height;
// Find maximum height encountered
preferredSize.Width = Math.Max(preferredSize.Width, childSize.Width);
}
}
}
// At design time we add space for the selection flap
if (_ribbon.InDesignHelperMode)
{
preferredSize.Width += DesignTimeDraw.FlapWidth + DesignTimeDraw.SepWidth;
}
return(preferredSize);
}
/// <summary>
/// Discover the preferred size of the element.
/// </summary>
/// <param name="context">Layout context.</param>
public override Size GetPreferredSize(ViewLayoutContext context)
{
Debug.Assert(context != null);
switch (CurrentSize)
{
case GroupItemSize.Small:
_viewToSmall.Clear();
break;
case GroupItemSize.Medium:
_viewToMedium.Clear();
break;
case GroupItemSize.Large:
_viewToLarge.Clear();
break;
default:
// Should never happen!
Debug.Assert(false);
break;
}
Size preferredSize = Size.Empty;
foreach (ViewBase child in this)
{
// Only investigate visible children
if (child.Visible)
{
// Ask child for it's own preferred size
Size childPreferred = child.GetPreferredSize(context);
// Cache the child preferred size for use in layout
switch (CurrentSize)
{
case GroupItemSize.Small:
_viewToSmall.Add(child, childPreferred);
break;
case GroupItemSize.Medium:
_viewToMedium.Add(child, childPreferred);
break;
case GroupItemSize.Large:
_viewToLarge.Add(child, childPreferred);
break;
}
// Always add on the width of the child
preferredSize.Width += childPreferred.Width;
// Find the tallest of the children
preferredSize.Height = Math.Max(preferredSize.Height, childPreferred.Height);
}
}
// Cache the size for the current item
switch (CurrentSize)
{
case GroupItemSize.Small:
_preferredSizeSmall = preferredSize;
break;
case GroupItemSize.Medium:
_preferredSizeMedium = preferredSize;
break;
case GroupItemSize.Large:
_preferredSizeLarge = preferredSize;
break;
}
return(preferredSize);
}