private Size TryCalculatePreferredSizeRow(ContainerProxy containerProxy, ElementProxy elementProxy, int startIndex, int endIndex, Rectangle rowBounds, out int breakIndex, bool measureOnly)
{
Debug.Assert(startIndex < endIndex, "Loop should be in forward Z-order.");
Point location = rowBounds.Location;
Size rowSize = Size.Empty;
int laidOutItems = 0;
breakIndex = startIndex;
bool wrapContents = GetWrapContents(containerProxy.Container);
bool breakOnNextItem = false;
ArrangedElementCollection collection = containerProxy.Container.Children;
for (int i = startIndex; i < endIndex; i++, breakIndex++)
{
elementProxy.Element = collection[i];
if (!elementProxy.ParticipatesInLayout)
{
continue;
}
// Figure out how much space this element is going to need (requiredSize)
Size prefSize;
if (elementProxy.AutoSize)
{
Size elementConstraints = new Size(int.MaxValue, rowBounds.Height - elementProxy.Margin.Size.Height);
if (i == startIndex)
{
// If the element is the first in the row, attempt to pack it to the row width. (If its not 1st, it will wrap
// to the first on the next row if its too long and then be packed if needed by the next call to TryCalculatePreferredSizeRow).
elementConstraints.Width = rowBounds.Width - rowSize.Width - elementProxy.Margin.Size.Width;
}
// Make sure that subtracting the margins does not cause width/height to be <= 0, or we will
// size as if we had infinite space when in fact we are trying to be as small as possible.
elementConstraints = LayoutUtils.UnionSizes(new Size(1, 1), elementConstraints);
prefSize = elementProxy.GetPreferredSize(elementConstraints);
}
else
{
// If autosizing is turned off, we just use the element's current size as its preferred size.
prefSize = elementProxy.SpecifiedSize;
// except if it is stretching - then ignore the affect of the height dimension.
if (elementProxy.Stretches)
{
prefSize.Height = 0;
}
// Enforce MinimumSize
if (prefSize.Height < elementProxy.MinimumSize.Height)
{
prefSize.Height = elementProxy.MinimumSize.Height;
}
}
Size requiredSize = prefSize + elementProxy.Margin.Size;
// Position the element (if applicable).
if (!measureOnly)
{
// If measureOnly = false, rowBounds.Height = measured row hieght
// (otherwise its the remaining displayRect of the container)
Rectangle cellBounds = new Rectangle(location, new Size(requiredSize.Width, rowBounds.Height));
// We laid out the rows with the elementProxy's margins included.
// We now deflate the rect to get the actual elementProxy bounds.
cellBounds = LayoutUtils.DeflateRect(cellBounds, elementProxy.Margin);
AnchorStyles anchorStyles = elementProxy.AnchorStyles;
containerProxy.Bounds = LayoutUtils.AlignAndStretch(prefSize, cellBounds, anchorStyles);
}
// Keep track of how much space is being used in this row
location.X += requiredSize.Width;
if (laidOutItems > 0)
{
// If control does not fit on this row, exclude it from row and stop now.
// Exception: If row is empty, allow this control to fit on it. So controls
// that exceed the maximum row width will end up occupying their own rows.
if (location.X > rowBounds.Right)
{
break;
}
}
// Control fits on this row, so update the row size.
// rowSize.Width != location.X because with a scrollable control
// we could have started with a location like -100.
rowSize.Width = location.X - rowBounds.X;
rowSize.Height = Math.Max(rowSize.Height, requiredSize.Height);
// check for line breaks.
if (wrapContents)
{
if (breakOnNextItem)
{
break;
}
else if (i + 1 < endIndex && CommonProperties.GetFlowBreak(elementProxy.Element))
{
if (laidOutItems == 0)
{
breakOnNextItem = true;
}
else
{
breakIndex++;
break;
}
}
}
laidOutItems++;
}
return(rowSize);
}
private static Size GetAnchorPreferredSize(IArrangedElement container)
{
Size prefSize = Size.Empty;
ArrangedElementCollection children = container.Children;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = container.Children[i];
if (!CommonProperties.GetNeedsDockLayout(element) && element.ParticipatesInLayout)
{
AnchorStyles anchor = GetAnchor(element);
Padding margin = CommonProperties.GetMargin(element);
Rectangle elementSpace = LayoutUtils.InflateRect(GetCachedBounds(element), margin);
if (IsAnchored(anchor, AnchorStyles.Left) && !IsAnchored(anchor, AnchorStyles.Right))
{
// If we are anchored to the left we make sure the container is large enough not to clip us
// (unless we are right anchored, in which case growing the container will just resize us.)
prefSize.Width = Math.Max(prefSize.Width, elementSpace.Right);
}
if (!IsAnchored(anchor, AnchorStyles.Bottom))
{
// If we are anchored to the top we make sure the container is large enough not to clip us
// (unless we are bottom anchored, in which case growing the container will just resize us.)
prefSize.Height = Math.Max(prefSize.Height, elementSpace.Bottom);
}
if (IsAnchored(anchor, AnchorStyles.Right))
{
// If we are right anchored, see what the anchor distance between our right edge and
// the container is, and make sure our container is large enough to accomodate us.
Rectangle anchorDest = GetAnchorDestination(element, Rectangle.Empty, /*measureOnly=*/ true);
if (anchorDest.Width < 0)
{
prefSize.Width = Math.Max(prefSize.Width, elementSpace.Right + anchorDest.Width);
}
else
{
prefSize.Width = Math.Max(prefSize.Width, anchorDest.Right);
}
}
if (IsAnchored(anchor, AnchorStyles.Bottom))
{
// If we are right anchored, see what the anchor distance between our right edge and
// the container is, and make sure our container is large enough to accomodate us.
Rectangle anchorDest = GetAnchorDestination(element, Rectangle.Empty, /*measureOnly=*/ true);
if (anchorDest.Height < 0)
{
prefSize.Height = Math.Max(prefSize.Height, elementSpace.Bottom + anchorDest.Height);
}
else
{
prefSize.Height = Math.Max(prefSize.Height, anchorDest.Bottom);
}
}
}
}
return(prefSize);
}
public override Size GetPreferredSize(Size proposedSize)
{
return(LayoutUtils.FlipSize(base.GetPreferredSize(LayoutUtils.FlipSize(proposedSize))));
}
private static bool TryCalculatePreferredSize(IArrangedElement container, bool measureOnly, out Size preferredSize)
{
ArrangedElementCollection children = container.Children;
// PreferredSize is garbage unless measureOnly is specified
preferredSize = new Size(-7103, -7105);
// Short circuit for items with no children
if (!measureOnly && children.Count == 0)
{
return(CommonProperties.GetAutoSize(container));
}
bool dock = false;
bool anchor = false;
bool autoSize = false;
for (int i = children.Count - 1; i >= 0; i--)
{
IArrangedElement element = children[i];
if (CommonProperties.GetNeedsDockAndAnchorLayout(element))
{
if (!dock && CommonProperties.GetNeedsDockLayout(element))
{
dock = true;
}
if (!anchor && CommonProperties.GetNeedsAnchorLayout(element))
{
anchor = true;
}
if (!autoSize && CommonProperties.xGetAutoSizedAndAnchored(element))
{
autoSize = true;
}
}
}
Debug.WriteLineIf(CompModSwitches.RichLayout.TraceInfo, "\tanchor : " + anchor.ToString());
Debug.WriteLineIf(CompModSwitches.RichLayout.TraceInfo, "\tdock : " + dock.ToString());
Size preferredSizeForDocking = Size.Empty;
Size preferredSizeForAnchoring = Size.Empty;
if (dock)
{
preferredSizeForDocking = LayoutDockedControls(container, measureOnly);
}
if (anchor && !measureOnly)
{
// In the case of anchor, where we currently are defines the preferred size,
// so dont recalculate the positions of everything.
LayoutAnchoredControls(container);
}
if (autoSize)
{
LayoutAutoSizedControls(container);
}
if (!measureOnly)
{
// Set the anchored controls to their computed positions.
ApplyCachedBounds(container);
}
else
{
// Finish the preferredSize computation and clear cached anchored positions.
preferredSizeForAnchoring = GetAnchorPreferredSize(container);
Padding containerPadding = Padding.Empty;
if (container is Control control)
{
// Calling this will respect Control.DefaultPadding.
containerPadding = control.Padding;
}
else
{
// Not likely to happen but handle this gracefully.
containerPadding = CommonProperties.GetPadding(container, Padding.Empty);
}
preferredSizeForAnchoring.Width -= containerPadding.Left;
preferredSizeForAnchoring.Height -= containerPadding.Top;
ClearCachedBounds(container);
preferredSize = LayoutUtils.UnionSizes(preferredSizeForDocking, preferredSizeForAnchoring);
}
return(CommonProperties.GetAutoSize(container));
}
private Size xLayoutRow(ContainerProxy containerProxy, ElementProxy elementProxy, int startIndex, int endIndex, Rectangle rowBounds, out int breakIndex, bool measureOnly)
{
Point location = rowBounds.Location;
Size empty = Size.Empty;
int num = 0;
breakIndex = startIndex;
bool wrapContents = GetWrapContents(containerProxy.Container);
bool flag2 = false;
ArrangedElementCollection children = containerProxy.Container.Children;
int num2 = startIndex;
while (num2 < endIndex)
{
elementProxy.Element = children[num2];
if (elementProxy.ParticipatesInLayout)
{
Size preferredSize;
if (elementProxy.AutoSize)
{
Size b = new Size(0x7fffffff, rowBounds.Height - elementProxy.Margin.Size.Height);
if (num2 == startIndex)
{
b.Width = (rowBounds.Width - empty.Width) - elementProxy.Margin.Size.Width;
}
b = LayoutUtils.UnionSizes(new Size(1, 1), b);
preferredSize = elementProxy.GetPreferredSize(b);
}
else
{
preferredSize = elementProxy.SpecifiedSize;
if (elementProxy.Stretches)
{
preferredSize.Height = 0;
}
if (preferredSize.Height < elementProxy.MinimumSize.Height)
{
preferredSize.Height = elementProxy.MinimumSize.Height;
}
}
Size size4 = preferredSize + elementProxy.Margin.Size;
if (!measureOnly)
{
Rectangle rect = new Rectangle(location, new Size(size4.Width, rowBounds.Height));
rect = LayoutUtils.DeflateRect(rect, elementProxy.Margin);
AnchorStyles anchorStyles = elementProxy.AnchorStyles;
containerProxy.Bounds = LayoutUtils.AlignAndStretch(preferredSize, rect, anchorStyles);
}
location.X += size4.Width;
if ((num > 0) && (location.X > rowBounds.Right))
{
return(empty);
}
empty.Width = location.X - rowBounds.X;
empty.Height = Math.Max(empty.Height, size4.Height);
if (wrapContents)
{
if (flag2)
{
return(empty);
}
if (((num2 + 1) < endIndex) && CommonProperties.GetFlowBreak(elementProxy.Element))
{
if (num == 0)
{
flag2 = true;
}
else
{
breakIndex++;
return(empty);
}
}
}
num++;
}
num2++;
breakIndex++;
}
return(empty);
}
