Re: [fltk.general] Memory leakage after creating a new Fl_Tree

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Re: Memory leakage after creating a new Fl_Tree Greg Ercolano Jun 11, 2021

On 6/11/21 6:00 AM, 'pvr...@btinternet.com' via fltk.general wrote:

Is it a simple matter starting at the root item and working my way through the tree and deleting all the branches?

    You should really just call Fl_Tree::clear() to clear the tree.
    To remove a specific item (and its children, if any), Fl_Tree::remove(item).

    You can try to do it yourself by deleting all the branch items, but I'm pretty sure
    you'd end up with the same results as just doing Fl_Tree::clear(). If there was
    something wrong with the deallocating process, I'd think you'd get the same results.

    Fl_Tree_Item's are around 176 bytes per item on a 64 bit machine, similar in size
    to an Fl_Group. On top of that is the memory for the label() string.

    If you parented FLTK widgets to items using Fl_Tree_Item::widget(),
    to clear /those/, you can call: Fl_Tree::Fl_Group::clear(). So to clear the tree
    and all child FLTK widgets I think you'd need to use:

            tree->clear();
            tree->Fl_Group::clear();

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