private void Group_GroupsChanged(object sender, GroupChangedEventArgs e)
{
List <Guid> layersAffected = new List <Guid>();
e.GroupsAffected.ForEach(x => layersAffected.AddRange(GetGroupLayerGuids(x)));
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(layersAffected));
}
private void PreMoveReassignBounds(GuidStructureItem parentGroup, Guid layer)
{
if (parentGroup != null)
{
Guid oldStart = parentGroup.StartLayerGuid;
Guid oldEnd = parentGroup.EndLayerGuid;
GuidStructureItem parentOfParent = parentGroup.Parent;
if (parentGroup.Subgroups.Count == 0 && parentGroup.StartLayerGuid == layer && parentGroup.EndLayerGuid == layer)
{
RemoveGroup(parentGroup);
}
else
{
if (parentGroup.EndLayerGuid == layer)
{
parentGroup.EndLayerGuid = FindBoundLayer(parentGroup, layer, false);
}
if (parentGroup.StartLayerGuid == layer)
{
parentGroup.StartLayerGuid = FindBoundLayer(parentGroup, layer, true);
}
}
if (parentOfParent != null)
{
ApplyBoundsToParents(parentOfParent, parentGroup, oldStart, oldEnd);
}
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(layer));
}
}
/// <summary>
/// Moves group and it's children from one index to another. This method makes changes in <see cref="Document"/> Layers.
/// </summary>
/// <param name="groupGuid">Group guid to move.</param>
/// <param name="newIndex">New group index, relative to <see cref="Document"/> Layers.</param>
public void MoveGroup(Guid groupGuid, int newIndex)
{
var group = GetGroupByGuid(groupGuid);
var parentGroup = group.Parent;
bool reverseOrder = true;
int groupTopIndex = Owner.Layers.IndexOf(Owner.Layers.First(x => x.GuidValue == group.EndLayerGuid));
int groupBottomIndex = Owner.Layers.IndexOf(Owner.Layers.First(x => x.GuidValue == group.StartLayerGuid));
int difference = newIndex - groupTopIndex;
if (newIndex < groupTopIndex)
{
reverseOrder = false;
difference = newIndex - groupBottomIndex;
}
if (difference == 0)
{
return;
}
Unassign(parentGroup, group);
List <Guid> layersInOrder = GetLayersInOrder(new GroupData(groupTopIndex, groupBottomIndex));
MoveLayersInGroup(layersInOrder, difference, reverseOrder);
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(layersInOrder));
}
public GuidStructureItem AddNewGroup(string groupName, GuidStructureItem childGroup)
{
if (childGroup == null)
{
throw new ArgumentException("Child group can't be null.");
}
GuidStructureItem group = new(groupName, childGroup.StartLayerGuid, childGroup.EndLayerGuid, new[] { childGroup }, childGroup.Parent) { IsExpanded = true };
if (childGroup.Parent == null)
{
Groups.Add(group);
Groups.Remove(childGroup);
}
else
{
childGroup.Parent.Subgroups.Add(group);
childGroup.Parent.Subgroups.Remove(childGroup);
}
childGroup.Parent = group;
group.GroupsChanged += Group_GroupsChanged;
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(GetGroupLayerGuids(group)));
return(group);
}
private void AssignParent(Guid layer, GuidStructureItem parent)
{
var currentParent = GetGroupByLayer(layer);
if (currentParent != null)
{
PreMoveReassignBounds(currentParent, layer);
}
Assign(parent, layer);
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(layer));
}
private void Assign(GuidStructureItem parentGroup, Guid layerGuid)
{
if (parentGroup != null)
{
Guid?oldStart = parentGroup.StartLayerGuid;
Guid?oldEnd = parentGroup.EndLayerGuid;
int layerIndex = Owner.Layers.IndexOf(Owner.Layers.First(x => x.GuidValue == layerGuid));
int folderTopIndex = Owner.Layers.IndexOf(Owner.Layers.First(x => x.GuidValue == parentGroup.EndLayerGuid));
int folderBottomIndex = Owner.Layers.IndexOf(Owner.Layers.First(x => x.GuidValue == parentGroup.StartLayerGuid));
int finalTopIndex = Math.Max(folderTopIndex, layerIndex);
int finalBottomIndex = Math.Min(folderBottomIndex, layerIndex);
Guid?topBoundLayer = FindBoundLayer(layerGuid, finalTopIndex, finalBottomIndex, false);
Guid?bottomBoundLayer = FindBoundLayer(layerGuid, finalTopIndex, finalBottomIndex, true);
if (topBoundLayer == parentGroup.EndLayerGuid)
{
parentGroup.EndLayerGuid = layerGuid;
}
if (bottomBoundLayer == parentGroup.StartLayerGuid)
{
parentGroup.StartLayerGuid = layerGuid;
}
if (parentGroup.Parent != null)
{
ApplyBoundsToParents(parentGroup.Parent, parentGroup, oldStart, oldEnd);
}
var args = new LayerStructureChangedEventArgs(layerGuid);
if (topBoundLayer.HasValue)
{
args.AffectedLayerGuids.Add(topBoundLayer.Value);
}
if (bottomBoundLayer.HasValue)
{
args.AffectedLayerGuids.Add(bottomBoundLayer.Value);
}
LayerStructureChanged?.Invoke(this, args);
}
}
private void RemoveGroup(GuidStructureItem parentFolder)
{
parentFolder.GroupsChanged -= Group_GroupsChanged;
var layerGuids = GetGroupLayerGuids(parentFolder);
if (parentFolder.Parent == null)
{
Groups.Remove(parentFolder);
}
else
{
parentFolder.Parent.Subgroups.Remove(parentFolder);
}
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(layerGuids));
}
// This will allow to add new group with multiple layers and groups at once. Not working well, todo fix
/*public GuidStructureItem AddNewGroup(string groupName, IEnumerable<Layer> layers, Guid activeLayer)
* {
* var activeLayerParent = GetGroupByLayer(activeLayer);
*
* List<GuidStructureItem> sameLevelGroups = new List<GuidStructureItem>();
*
* var group = AddNewGroup(groupName, activeLayer);
*
* if (activeLayerParent == null)
* {
* sameLevelGroups.AddRange(Groups);
* }
* else
* {
* sameLevelGroups.AddRange(activeLayerParent.Subgroups);
* }
*
* sameLevelGroups.Remove(group);
* group.Subgroups = new ObservableCollection<GuidStructureItem>(sameLevelGroups);
*
* sameLevelGroups = new(sameLevelGroups.Where(x => IsChildOf(activeLayer, x)));
*
* Guid lastLayer = activeLayer;
*
* foreach (var layer in layers)
* {
* if (layer.LayerGuid == activeLayer)
* {
* continue;
* }
*
* Owner.MoveLayerInStructure(layer.LayerGuid, lastLayer, false);
* lastLayer = layer.LayerGuid;
* }
*
* return group;
* }*/
/// <summary>
/// Adds a new group to layer structure taking into consideration nesting. Invokes LayerStructureChanged event.
/// </summary>
/// <param name="groupName">Name of a group.</param>
/// <param name="childLayer">Child layer of a new group.</param>
/// <returns>Newly created group (<see cref="GuidStructureItem"/>).</returns>
public GuidStructureItem AddNewGroup(string groupName, Guid childLayer)
{
var parent = GetGroupByLayer(childLayer);
GuidStructureItem group = new(groupName, childLayer) { IsExpanded = true };
if (parent == null)
{
Groups.Add(group);
}
else
{
group.Parent = parent;
parent.Subgroups.Add(group);
}
group.GroupsChanged += Group_GroupsChanged;
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(childLayer));
return(group);
}
/// <summary>
/// Assigns group new parent.
/// </summary>
/// <param name="group">Group to assign parent</param>
/// <param name="referenceLayerGroup">Parent of group.</param>
public void ReassignParent(GuidStructureItem group, GuidStructureItem referenceLayerGroup)
{
group.Parent?.Subgroups.Remove(group);
if (Groups.Contains(group))
{
Groups.Remove(group);
}
if (referenceLayerGroup == null)
{
if (!Groups.Contains(group))
{
Groups.Add(group);
group.Parent = null;
}
}
else
{
referenceLayerGroup.Subgroups.Add(group);
group.Parent = referenceLayerGroup;
}
LayerStructureChanged?.Invoke(this, new LayerStructureChangedEventArgs(GetGroupLayerGuids(group)));
}