/// <summary>Update causes all changes to be applied and layouts to occur.</summary>
public void Update()
{
if (DoLayout && AllowLayout)
{
// Layout RootDocument.
Layout();
}
else if (StylesToUpdate != null)
{
// Local update - these events typically fire from changes to things like colour/z-index etc
// as well as for reflows of "flow root" nodes.
// It's done down here incase a full layout request is made (above).
// If a full layout request was made, it would cover all of these anyway.
UpdateMode modeToUse = HighestUpdateMode;
HighestUpdateMode = UpdateMode.None;
bool anyReflowMode = ((int)modeToUse > (int)UpdateMode.PaintAll);
if (anyReflowMode)
{
// We'll be re-rendering.
Reset();
// Invalidate input pointers:
// (So they figure out what elements are under the mouse/fingers)
PowerUI.Input.PointersInvalid = true;
// First, push all batches to the pool - inlined for speed:
// Note that no isolated batches enter either the queue or the pool until their no longer isolated.
if (FirstBatch != null)
{
LastBatch.BatchAfter = UIBatchPool.First;
UIBatchPool.First = FirstBatch;
}
FirstBatch = LastBatch = null;
// Note: Batches are Prepared For Layout as they are added.
LayoutOccuring = true;
}
Css.RenderableData style = StylesToUpdate;
StylesToUpdate = null;
while (style != null)
{
UpdateMode mode = style.NextUpdateMode;
switch (mode)
{
case UpdateMode.PaintAll:
// Don't bother if we're doing either kind of reflow:
if (anyReflowMode)
{
continue;
}
// Repaint it:
style.RepaintAll(this);
break;
case UpdateMode.Paint:
// Repaint it:
style.Repaint(this);
// Must also repaint the nodes child text nodes too (as they share the same CS):
NodeList kids = style.Node.childNodes_;
if (kids != null)
{
// For each child node..
for (int i = 0; i < kids.length; i++)
{
// Get it as a text node:
Node child = kids[i];
if (child is TextNode)
{
// Repaint it too:
(child as IRenderableNode).RenderData.Repaint(this);
}
}
}
break;
case UpdateMode.Reflow:
// Flow root reflow request.
// Must setup stacks and any other renderer settings here!
// Perform the initial reflow now:
style.UpdateCss(this);
style.Reflow(this);
break;
case UpdateMode.Render:
// Only call render:
style.Render(this);
break;
/*
* case UpdateMode.FastReflow:
*
* // Fast reflow request only requires a repaint.
*
* break;
*/
}
// Clear its update mode:
style.NextUpdateMode = UpdateMode.None;
style = style.Next;
}
if (!anyReflowMode)
{
// Only a flush is required:
UIBatch toFlush = FirstBatch;
while (toFlush != null)
{
toFlush.Flush();
toFlush = toFlush.BatchAfter;
}
}
else
{
// Position elements locally.
// This sets their ParentOffset values and as a result finds their PixelWidth.
IRenderableNode root = RootDocument.documentElement as IRenderableNode;
if (root != null)
{
// Finally, position them globally:
// This calculates OffsetLeft/Top and also fires the render event on the computed style object.
root.RenderData.Render(this);
}
LayoutOccuring = false;
// Tell each batch we're done laying them out:
UIBatch currentBatch = FirstBatch;
while (currentBatch != null)
{
currentBatch.CompletedLayout();
currentBatch = currentBatch.BatchAfter;
}
// Hide all pool entries:
UIBatchPool.HideAll();
}
}
}