C++ wxWidgets: Set Font After Widget Creation

Question

So basically I found out that you can only set font before the widget creation or font won't change, but I need to change the font after element creation so how can I do it?

void MyMain::makeBtnPanel()
{
    btnPanel = new wxPanel(this, wxID_ANY);
    wxGridSizer* grid = new wxGridSizer(5, 4, 2, 2);

    // here is hidden code that is adding widgets to grid

    btnPanel->SetSizer(grid);
    sizer->Add(btnPanel, 5, wxEXPAND);
}


void MyMain::styleBtns()
{
    wxFont mainBtnFont(
        16,
        wxFONTFAMILY_DEFAULT,
        wxFONTSTYLE_NORMAL,
        wxFONTWEIGHT_EXTRALIGHT
    );
    btnPanel->SetFont(mainBtnFont);
}

styleBtns function is not working but if I set font immediately after btnPanel creation (on 2nd line of makeBtnPanel function) font will be set.

class constructor:

MyMain::MyMain()
    : wxFrame(
        NULL,
        wxID_ANY,
        "Calculator",
        wxDefaultPosition,
        wxSize(322, 392)
    )
{
    sizer = new wxBoxSizer(wxVERTICAL);
    SetSizer(sizer);
    makeDisplayPanel();
    makeBtnPanel();
    styleBtns();
    setupMainFrame();
}

Answer 1

Omg, I'm so dumb. I couldn't change font because I was setting font to empty variables. I wrote else if instead of if and code didn't execute, it didn't set these variables.