WxWidgets File Dialog problems

Question

I'm having a bit of trouble in my attempts to learn WXWidgets. I'm currently trying to work with file Dialogs, and I've got one opening just fine. But I run into trouble whenever I try to apply styles to the window. I get an undeclared identifier for whatever style I use.

My code is as follows (yes, I know, hello world app. I'm experimenting with all the things I need to learn to do before actually making a fully fledged app)

    #include "wx/wx.h"
    #include "wx/filedlg.h"

    #include "HelloWorldApp.h"

    IMPLEMENT_APP(HelloWorldApp)

    bool HelloWorldApp::OnInit()
    {
        wxFrame *frame = new wxFrame((wxFrame*) NULL, -1, _T("Hello wxWidgets World"));


        wxFileDialog* OpenDialog = new wxFileDialog(frame, _("Choose a file to open"), wxEmptyString, wxEmptyString, 
            _("Image Files (*.jpg, *.png, *.gif, *.bmp)|*.jpg;*.png;*.gif;*.bmp|Sound Files (*.wav, *.mp3)|*.wav;*.mp3"),
wxFD_MULTIPLE);

        frame->CenterOnScreen();
        frame->Show(true);

        OpenDialog->ShowModal();

        SetTopWindow(frame);
        return true;
    }

It runs just fine without the "wxFD_MULTIPLE" argument. I'm using version 2.8.12 of wxWidgets.

Thanks for reading. I really appreciate any help or guidance anyone can give. Sorry if it's something really obvious I'm missing.

Answer 1

In very old wxWidgets versions (2.6), this style was known as wxMULTIPLE but wxFD_MULTIPLE is definitely available in any 2.8.x version. You should give the (beginning of) the errors you get to allow us to understand what is really going on.

Completely independently, your code is wrong because it contains a memory leak: the dialog must be destroyed as modal dialogs are exceptions to the usual rule that all windows should be allocated on the heap and can be allocated on the stack, i.e. used as simple local variables, see the example in the documentation. Looking at the "dialogs" sample code is also strongly recommended.