On 06/10/2017 at 12:47, xxxxxxxx wrote:
Hi Peterakos, thanks for writing us.
With reference to your question, from my research, you should not encounter any issue in defining a new root in the TreeViewFunctions::Select() method. Are you maybe deleting the old root before setting the new one?
I've actually changed the "Layer Shader Browser" example found in the cinema4dsdk modifying the accepted items from a LayerShaderLayer to a standard BaseObject. The behavior is simple but yet adhering to what you've described: every time an item is selected in the TreeViewCustomGui, assuming that this isn't the first, the newly selected object become the new root whilst the previous "root" is removed from the scene and disposed.
This actually happen in the TreeViewFunctions::Select() method as shown below:
void Select(void* root, void* userdata, void* obj, Int32 mode)
BaseObject* bo = static_cast<BaseObject*>(obj);
// retrieve the GeDialog instance
MyTreeBrowser* tb = ((MyTreeBrowser* )userdata);
// retrieve the TreeViewCustomGui instance
TreeViewCustomGui* tree = (TreeViewCustomGui* )tb->FindCustomGui(DLG_MYTREEBROWSER_TREE, CUSTOMGUI_TREEVIEW);
// retrieve the first object which is also set as root
BaseObject* currentRoot = (BaseObject* )this->GetFirst(root, userdata);
// set the new root
tree->SetRoot(bo, this, userdata);
// eventually remove the "previous" root
if (currentRoot && currentRoot != bo)
// do something else
That said I actually used no fancy callbacks or messages rather than simply relying on the methods pointed above.
Let me know if it helps, otherwise well let's dig down again.