Re: Unable to select/click items in wxListBox

Hi,

I see two issues in the code you provided.
First, you create mainPanel twice, in the initializer list and again in 
the body of the constructor. I would remove it from the initializer list.
I suspect the panel(s) and list are overlapping, so you are clicking on 
the panel instead of the list.

Second, the panel/sizer structure seems wrong. You are adding both the 
panel and the listbox as children of the main frame (of 'this').

I think you want the listbox as child of the panel, like this:
     mainPanel = new wxPanel(this, wxID_ANY, wxDefaultPosition, 
wxSize(600, 600));
     s1 = new wxBoxSizer(wxVERTICAL);
     m_tgeListBox = new wxListBox(mainPanel, wxID_ANY, 
wxDefaultPosition, wxSize(300, 200));
     s1->Add(m_tgeListBox, 1, wxEXPAND);
     mainPanel->SetSizer(s1);

Since you expand the listbox to fill the entire frame, you could also 
omit the panel entirely:
     s1 = new wxBoxSizer(wxVERTICAL);
     m_tgeListBox = new wxListBox(this, wxID_ANY, wxDefaultPosition, 
wxSize(300, 200));
     s1->Add(m_tgeListBox, 1, wxEXPAND);
     SetSizer(s1);

Maarten


On 8-9-2023 07:21, Eva L wrote:
> Hello. I'm having trouble selecting and/or clicking items in wxListBox 
> only if it's part of a sizer. I basically want the wxListBox to expand 
> with the window.
>
> Here is the code:
> *MainFrame::MainFrame(const wxString& title)
>     : wxFrame(nullptr, wxID_ANY, title),
>       mainPanel(new wxPanel(this, wxID_ANY, wxDefaultPosition, 
> wxSize(300, 200)))
> {
> Bind(wxEVT_CLOSE_WINDOW, &MainFrame::OnClose, this);
>
> SetFont(GetFont().Scale(1.5));
>
> mainPanel = new wxPanel(this, wxID_ANY, wxDefaultPosition, wxSize(600, 
> 600));
> s1 = new wxBoxSizer(wxVERTICAL);
>
> m_tgeListBox = new wxListBox(this, wxID_ANY, wxDefaultPosition, 
> wxSize(300, 200));
>
> s1->Add(m_tgeListBox, 1, wxEXPAND);
> SetSizerAndFit(s1);
> }*
> *
> *
> Why is this happening and how can it be solved?
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