/// <summary>
/// Should be called by derived classes to indicate that a branch modification (add, remove, reorder) has occurred.
/// </summary>
/// <param name="modification">Indicates the type of modification</param>
protected void DoBranchModification(BranchModificationEventArgs modification)
{
if (_onBranchModification != null)
{
_onBranchModification(this, modification);
}
}
private void OnChildBranchModification(object sender, BranchModificationEventArgs e)
{
if (e.Action == BranchModificationAction.DeleteItems
||
e.Action == BranchModificationAction.InsertItems)
{
// this can also cause changes in column check box state. Find and refresh appropriate row
for (var i = 0; i < _childBranchArray.Length; i++)
{
if (_childBranchArray[i].Branch == e.Branch)
{
if (_onBranchModification != null)
{
_onBranchModification(
this,
BranchModificationEventArgs.DisplayDataChanged(
new DisplayDataChangedData(VirtualTreeDisplayDataChanges.StateImage, this, i, -1, 1)));
}
}
}
}
}
private void OnBranchModification(object sender, BranchModificationEventArgs change)
{
//Decode the BranchModification structure to correspond to methods on the
//tree. One branch can be in multiple trees. This event-based indirection
//enables the branches to multicast instead of binding directly to a tree..
ITree tree = this;
switch (change.Action)
{
case BranchModificationAction.DisplayDataChanged:
{
var displayChange = change as BranchModificationEventArgs.BranchModificationDisplayData;
tree.DisplayDataChanged(
new DisplayDataChangedData(
displayChange.Changes, displayChange.Branch, displayChange.Index, displayChange.Column, displayChange.Count));
break;
}
case BranchModificationAction.Realign:
tree.Realign(change.Branch);
break;
case BranchModificationAction.InsertItems:
tree.InsertItems(change.Branch, change.Index, change.Count);
break;
case BranchModificationAction.DeleteItems:
tree.DeleteItems(change.Branch, change.Index, change.Count);
break;
case BranchModificationAction.MoveItem:
tree.MoveItem(change.Branch, change.Index, change.Count);
break;
case BranchModificationAction.ShiftBranchLevels:
{
var levelChange = change as BranchModificationEventArgs.BranchModificationLevelShift;
tree.ShiftBranchLevels(
new ShiftBranchLevelsData(
change.Branch, levelChange.RemoveLevels, levelChange.InsertLevels, levelChange.Depth,
levelChange.ReplacementBranch, levelChange.BranchTester, change.Index, change.Count, levelChange.NewCount));
break;
}
case BranchModificationAction.Redraw:
tree.Redraw = change.Flag;
break;
case BranchModificationAction.DelayRedraw:
tree.DelayRedraw = change.Flag;
break;
case BranchModificationAction.ListShuffle:
tree.ListShuffle = change.Flag;
break;
case BranchModificationAction.DelayListShuffle:
tree.DelayListShuffle = change.Flag;
break;
case BranchModificationAction.UpdateCellStyle:
if (MultiColumnSupport)
{
(this as IMultiColumnTree).UpdateCellStyle(change.Branch, change.Index, change.Count, change.Flag);
}
break;
case BranchModificationAction.RemoveBranch:
tree.RemoveBranch(change.Branch);
break;
}
}
private void OnInnerBranchModification(object sender, BranchModificationEventArgs args)
{
if (OnBranchModification != null)
{
args.Index = FindIndexForBranch(args.Branch, args.Index);
args.Branch = this;
OnBranchModification(this, args);
}
}