| public ClearUnwantedPart ( bool differentObject ) : void | ||
| differentObject | bool | |
| return | void | |
/// <summary>
/// Create slices appropriate for current root object and layout, reusing any existing slices,
/// and clearing out any that remain unused. If it is for a different object, reuse is more limited.
/// </summary>
private void CreateSlices(bool differentObject)
{
var watch = new Stopwatch();
watch.Start();
bool wasVisible = this.Visible;
var previousSlices = new ObjSeqHashMap();
int oldSliceCount = Slices.Count;
ConstructingSlices = true;
try
{
// Bizarrely, calling Hide has been known to cause OnEnter to be called in a slice; we need to suppress this,
// hence guarding it by setting ConstructingSlices.
Hide();
if (m_currentSlice != null)
m_currentSlice.SetCurrentState(false); // needs to know no longer current, may want to save something.
m_currentSlice = null;
if (differentObject)
m_currentSliceNew = null;
//if (differentObject)
// Slices.Clear();
var dummySlices = new List<Slice>(Slices.Count);
foreach (Slice slice in Slices)
{
slice.Visible = false;
if (slice.Key != null) // dummy slices may not have keys and shouldn't be reused.
previousSlices.Add(slice.Key, slice);
else
dummySlices.Add(slice);
}
bool gonnerHasToolTip = false; // Does any goner have one?
// Get rid of the dummies we aren't going to remove.
foreach (Slice slice in dummySlices)
{
gonnerHasToolTip |= slice.ToolTip != null;
RemoveSlice(slice);
}
previousSlices.ClearUnwantedPart(differentObject);
CreateSlicesFor(m_root, null, m_rootLayoutName, m_layoutChoiceField, 0, 0, new ArrayList(20), previousSlices, null);
// Clear out any slices NOT reused. RemoveSlice both
// removes them from the DataTree's controls collection and disposes them.
foreach (Slice gonner in previousSlices.Values)
{
gonnerHasToolTip |= gonner.ToolTip != null;
RemoveSlice(gonner);
}
if (gonnerHasToolTip)
{
// Since the dumb MS ToolTip class can't just remove one,
// we have to remove them all and re-add the remaining ones
// in order to have it really turn loose of the SliceTreeNode.
m_tooltip.RemoveAll();
foreach (Slice keeper in Slices)
SetToolTip(keeper);
}
ResetTabIndices(0);
}
finally
{
ConstructingSlices = false;
}
if (wasVisible)
Show();
watch.Stop();
// Uncomment this to investigate slice performance or issues with dissappearing slices
//Debug.WriteLine("CreateSlices took " + watch.ElapsedMilliseconds + " ms. Originally had " + oldSliceCount + " controls; now " + Slices.Count);
//previousSlices.Report();
}