// It just determines if any ancestor supports StarLayout and is not in StarLayoutPass mode.
private bool IsAutoLayoutPass(double sumOfHeight, int childrenCount)
{
RibbonGalleryCategory category = (RibbonGalleryCategory)ItemsControl.GetItemsOwner(this);
if (category != null)
{
// Adding virtual count of items and cumulative height to RGC for the purpose of calcualting
// avg height as scrolling delta in RibbonGalleryCategoriesPanel.
category.averageItemHeightInfo.count = childrenCount;
category.averageItemHeightInfo.cumulativeHeight = sumOfHeight;
RibbonGallery gallery = category.RibbonGallery;
if (gallery != null)
{
RibbonGalleryCategoriesPanel categoriesPanel = (RibbonGalleryCategoriesPanel)gallery.ItemsHostSite;
if (categoriesPanel != null)
{
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)categoriesPanel;
if (iContainsStarLayoutManager.StarLayoutManager != null)
{
return(!iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass);
}
}
}
}
return(false);
}
public void OnInitializeLayout()
{
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
if (iContainsStarLayoutManager.StarLayoutManager != null && !iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass)
{
TreeHelper.InvalidateMeasureForVisualAncestorPath(this, RibbonHelper.IsISupportStarLayout);
}
}
private void OnRibbonGroupItemsPanelUnloaded(object sender, RoutedEventArgs e)
{
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
if (iContainsStarLayoutManager.StarLayoutManager != null)
{
iContainsStarLayoutManager.StarLayoutManager.UnregisterStarLayoutProvider(this);
iContainsStarLayoutManager.StarLayoutManager = null;
}
}
public void OnInitializeLayout()
{
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
if (iContainsStarLayoutManager.StarLayoutManager != null)
{
TreeHelper.InvalidateMeasureForVisualAncestorPath(this, RibbonHelper.IsISupportStarLayout);
((RibbonGallery)TargetElement).InvalidateMeasureOnAllCategoriesPanel();
}
}
/// <summary>
/// In normal(Star) pass this panel behaves like a StackPanel but during Auto(non Star) pass
/// It returns minimum Width and Height required to represent the children.
/// </summary>
/// <param name="availableSize"></param>
/// <returns></returns>
protected override Size MeasureOverride(Size availableSize)
{
RibbonHelper.InitializeStarLayoutManager(this);
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
bool isStarLayoutPass = (iContainsStarLayoutManager.StarLayoutManager == null ? true : iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass);
if (isStarLayoutPass)
{
return(RealMeasureOverride(availableSize));
}
else
{
return(AutoPassMeasureOverride());
}
}
protected override Size MeasureOverride(Size availableSize)
{
Size desiredSize = new Size();
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
RibbonHelper.InitializeStarLayoutManager(this);
bool isStarLayoutPass = (iContainsStarLayoutManager.StarLayoutManager == null ? false : iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass);
if (!isStarLayoutPass)
{
desiredSize = NonStarPassMeasure(availableSize);
}
else
{
desiredSize = StarMeasurePass(availableSize);
}
return(desiredSize);
}
// It just determines if any ancestor supports StarLayout and is not in StarLayoutPass mode.
private bool IsAutoLayoutPass()
{
RibbonGallery gallery = Gallery;
if (gallery != null)
{
RibbonGalleryCategoriesPanel categoriesPanel = gallery.ItemsHostSite as RibbonGalleryCategoriesPanel;
if (categoriesPanel != null)
{
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)categoriesPanel;
if (iContainsStarLayoutManager.StarLayoutManager != null)
{
return(!iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass);
}
}
}
return(false);
}
private Size AutoPassMeasureOverride()
{
Size desiredSize = new Size();
Size childConstraint = new Size(double.PositiveInfinity, double.PositiveInfinity);
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
// This is Auto(non Star) pass
UIElementCollection children = InternalChildren;
int childrenCount, endCountForUpdate = children.Count;
int galleryItemCount = 0;
double galleryItemCumulativeHeight = 0.0;
double maxChildWidth = 0.0;
double maxChildHeight = 0.0;
double maxColumnWidth = 0.0;
// Since we support SharedColumnSizes across different categories, we need
// to repeatedly measure them until their MaxColumnWidth has been synchronized.
// The inner loop iterates over all of those categories that need an update.
// Of course in the beginning all of them do. During that pass we detect if the
// MaxColumnWidth has increased such that a previously measured category needs
// an update. If so we make another pass over those categories once more. We
// repeat this strategy until none of the categories need an update.
while (endCountForUpdate > 0)
{
childrenCount = endCountForUpdate;
endCountForUpdate = 0;
for (int i = 0; i < childrenCount; i++)
{
UIElement child = children[i] as UIElement;
child.Measure(childConstraint);
Size childSize = child.DesiredSize;
maxChildWidth = Math.Max(maxChildWidth, childSize.Width);
maxChildHeight = Math.Max(maxChildHeight, childSize.Height);
RibbonGalleryCategory category = child as RibbonGalleryCategory;
if (category != null)
{
galleryItemCount += category.averageItemHeightInfo.Count;
galleryItemCumulativeHeight += category.averageItemHeightInfo.CumulativeHeight;
// If the category is a ColumnSizeScope in itself it does not need
// to be synchronized with the gallery's scope and hence can be ignored.
if (!category.IsSharedColumnSizeScope && DoubleUtil.GreaterThan(category.MaxColumnWidth, maxColumnWidth))
{
maxColumnWidth = category.MaxColumnWidth;
endCountForUpdate = i;
}
}
}
}
if (galleryItemCount == 0 || galleryItemCumulativeHeight == 0.0)
{
internalScrollDelta = 16.0;
}
else
{
internalScrollDelta = galleryItemCumulativeHeight / galleryItemCount;
}
desiredSize.Width = maxChildWidth;
desiredSize.Height = maxChildHeight;
return(desiredSize);
}
/// <summary>
/// In normal(Star) pass this panel behaves like a StackPanel but during Auto(non Star) pass
/// It returns minimum Width and Height required to represent the children. There is another
/// mode wherein it provides laying out mechanism for InRibbonGallery in INRibbon mode.
/// </summary>
/// <param name="availableSize"></param>
/// <returns></returns>
protected override Size MeasureOverride(Size availableSize)
{
RibbonGallery gallery = this.Gallery;
#if IN_RIBBON_GALLERY
InRibbonGallery parentInRibbonGallery = gallery != null ? gallery.ParentInRibbonGallery : null;
bool isInInRibbonMode = parentInRibbonGallery != null ? parentInRibbonGallery.IsInInRibbonMode : false;
// For an InRibbonGallery rendering with IsDropDownOpen==true, we force gallery.ItemsPresenter's
// MinWidth to be at least the value of IRG.ContentPresenter.ActualWidth. This way, the IRG's popup
// totally eclipses the IRG, which is required by the Office Fluent UI guidelines.
if (gallery != null &&
gallery.ItemsPresenter != null &&
parentInRibbonGallery != null)
{
if (isInInRibbonMode && _irgIsConstrainingWidth)
{
gallery.ItemsPresenter.MinWidth = _originalGalleryItemsPresenterMinWidth;
_irgIsConstrainingWidth = false;
}
else if (parentInRibbonGallery.IsDropDownOpen && !_irgIsConstrainingWidth)
{
_originalGalleryItemsPresenterMinWidth = gallery.ItemsPresenter.MinWidth;
double minWidthFromParent = parentInRibbonGallery.CalculateGalleryItemsPresenterMinWidth();
gallery.ItemsPresenter.MinWidth = Math.Max(minWidthFromParent, _originalGalleryItemsPresenterMinWidth);
_irgIsConstrainingWidth = true;
}
}
if (!isInInRibbonMode)
{
#endif
RibbonHelper.InitializeStarLayoutManager(this);
#if IN_RIBBON_GALLERY
}
#endif
IContainsStarLayoutManager iContainsStarLayoutManager = (IContainsStarLayoutManager)this;
bool isStarLayoutPass = (iContainsStarLayoutManager.StarLayoutManager == null ? true : iContainsStarLayoutManager.StarLayoutManager.IsStarLayoutPass);
#if IN_RIBBON_GALLERY
if (isInInRibbonMode)
{
PreComputeMaxRibbonGalleryItemWidthAndHeight();
return(InRibbonGalleryModeMeasureOverride(availableSize));
}
else
{
#endif
if (isStarLayoutPass)
{
return(RealMeasureOverride(availableSize));
}
else
{
return(AutoPassMeasureOverride());
}
#if IN_RIBBON_GALLERY
}
#endif
}