private void RemoveHandlers(AdvancedPart part)
{
part.DeleteRequested -= Part_DeleteRequested;
part.IsSelectedChanged -= Part_IsSelectedChanged;
// is the selected part in the hierarchy being removed?
if (SelectedPart == part)
{
SelectedPart = null;
}
else if (SelectedPart != null)
{
var junction = SelectedPart.Container;
while (junction != null)
{
// yep, one of the parent junctions of the SelectedPart is the one being removed
if (junction == part)
{
SelectedPart = null;
break;
}
junction = junction.Container;
}
}
}
private void AddPart(AdvancedPart part, int index)
{
// we're going to be internally consistent
layoutParts.SuspendLayout();
Control control;
if (part is WinFormsAdvancedPartJunction)
control = new AdvancedPartJunctionView((WinFormsAdvancedPartJunction)part);
else
control = new AdvancedPartNodeView((WinFormsAdvancedPartNode)part);
control.Dock = DockStyle.Fill;
layoutParts.RowStyles.Insert(index, new RowStyle(SizeType.AutoSize));
// shift all controls after this point down one row
// (the last row will have nothing in it, the row of index will have an existing control
for (int i = layoutParts.RowStyles.Count - 2; i >= index; i--)
{
var move = layoutParts.GetControlFromPosition(0, i);
if (move != null)
layoutParts.SetCellPosition(move, new TableLayoutPanelCellPosition(0, i + 1));
}
layoutParts.Controls.Add(control, 0, index);
layoutParts.ResumeLayout();
// update height outside SuspendLayout or it won't recalculate correctly
//ScrollHeight += ControlHeight(control);
}
private void Part_IsSelectedChanged(object sender, EventArgs e)
{
var part = (AdvancedPart)sender;
if (part.IsSelected)
{
SelectedPart = part;
}
else if (part == SelectedPart)
{
SelectedPart = null;
}
}
protected virtual void Remove(AdvancedPart part)
{
if (part == null)
{
return;
}
RemoveHandlers(part);
if (Part == part)
{
Part = null;
}
else
{
var container = part.Container;
container.Parts.Remove(part);
// remove the container if it's only got 1 item left
if (container.Parts.Count == 1)
{
RemoveHandlers(container);
var parentContainer = container.Container;
if (parentContainer == null)
{
container.Parts[0].Container = null;
Part = container.Parts[0];
}
else
{
var index = parentContainer.Parts.IndexOf(container);
parentContainer.Parts.Remove(container);
// if the parent container junction type is the same as what we're inserting, merge the parts
var toMerge = container.Parts[0];
if (toMerge is AdvancedPartJunction && ((AdvancedPartJunction)toMerge).Type == parentContainer.Type)
{
RemoveHandlers(toMerge);
foreach (var p in (AdvancedPartJunction)toMerge)
{
parentContainer.Add(p);
}
}
else
{
parentContainer.Insert(index, container.Parts[0]);
}
}
}
}
}
private void AddHandlers(AdvancedPart part)
{
part.DeleteRequested += Part_DeleteRequested;
part.IsSelectedChanged += Part_IsSelectedChanged;
}
