c++ builder: dynamically remove all TPanel's from TFramedVertScrollBox

Question

In my C++ Builder Project i have a TFramedVertScrollBox (pnl_art_box) which dynamically gets TPanel's. I want to clear out all existing TPanel's before adding the "new" ones.

for(int i = 0; i < this->pnl_art_box->ComponentCount; i++)
{
    // this here is where i dont find any solution ...
    this->pnl_art_box->Components[i]->DestroyComponents(); 
}
for(int i = 0; i < i_article_amount;i++)
{
    this->articlelistpanels[i] = new TPanel(this->pnl_art_box);
    this->articlelistlabels[i] = new TLabel(this);

    this->articlelistlabels[i]->Text = this->articlelist[i].get_name();
    this->articlelistpanels[i]->Align = Fmx::Types::TAlignLayout::MostTop;

    this->articlelistpanels[i]->AddObject(this->articlelistlabels[i]);
    this->pnl_art_box->AddObject(this->articlelistpanels[i]);
}

At Google i only found very less help and none of them is in C++;

Would be nice, if someone could tell me, when i do wrong.

Sincerely Timo Treichel

Have you tried just do delete all elements in articlelistpanels/labels and clear them (if vectors or lists or...)? Possibly, you need to call RemoveObject first. — Aconcagua, May 09 '16 at 17:49
that also brought no effect, since the old components are still listed in `this->pnl_art_box` — Timo Treichel, May 10 '16 at 09:42
Have you tried to simpy call `this->pnl_art_box->DestroyComponents();` or `this->pnl_art_box->DeleteChildren();` (not sure which one to prefer - tend to the latter one) instead of the for loop? If you do this repeatedly, be aware that the contents of your two lists will most probably get invalid! — Aconcagua, May 10 '16 at 09:53
yes i did, none of them had the wanted effect ... i finally found the solution, it was `this->pnl_art_box->Components[i]->DisposeOf();` — Timo Treichel, May 10 '16 at 09:59

score 0 · Accepted Answer · answered May 10 '16 at 09:58

0

I finally found it by myself. The correct command had been:

for(int i = 1; i < this->pnl_art_box->ComponentCount; i++)
{
    this->pnl_art_box->Components[i]->DisposeOf();
}

answered May 10 '16 at 09:58

Timo Treichel

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c++ builder: dynamically remove all TPanel's from TFramedVertScrollBox

1 Answers1