I have created a sample program to illustrate the problem, which I've included below in case anyone is interested. The problem may be limited to Linux (wxGTK) - ? In any case, I have reported it through the wxWidgets bug tracker, but since this is my first report, it will have to pass through the moderator(s). We'll see what happens ...
On Linux (maybe also Windows/MingW??), the following code can be compiled via command line as follows: g++ example.cpp `wx-config --cxxflags --libs` -o example
When run, the leftmost and rightmost listboxes will accept drag-and-drop of files from a browser, but the middle one will not; the difference is whether the parent is the underlying panel (appropriate for 2.8 builds, and how wxsmith currently generates the code) or is the static box attached to the wxStaticBoxSizer.
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#include <wx/app.h>
#include <wx/frame.h>
#include <wx/listbox.h>
#include <wx/menu.h>
#include <wx/panel.h>
#include <wx/sizer.h>
#include <wx/dnd.h>
#include <wx/intl.h>
#include <wx/string.h>
class testApp : public wxApp
{
public:
virtual bool OnInit();
};
class testFrame: public wxFrame
{
public:
testFrame(wxWindow* parent,wxWindowID id = -1);
virtual ~testFrame();
private:
void OnQuit(wxCommandEvent& event);
wxListBox* lbPlain;
wxListBox* lbStatic1;
wxListBox* lbStatic2;
DECLARE_EVENT_TABLE()
};
class DF : public wxFileDropTarget
{
public:
DF ( wxListBox * lb_target );
virtual bool OnDropFiles ( wxCoord x, wxCoord y, const wxArrayString & files );
protected:
wxListBox * m_target;
};
IMPLEMENT_APP(testApp);
bool testApp::OnInit()
{
testFrame* Frame = new testFrame(0);
Frame->Show();
SetTopWindow(Frame);
return true;
}
//#include <wx/msgdlg.h>
BEGIN_EVENT_TABLE(testFrame,wxFrame)
END_EVENT_TABLE()
testFrame::testFrame(wxWindow* parent,wxWindowID id)
{
wxBoxSizer* bsOuter;
wxPanel* Panel1;
wxBoxSizer* bsInner;
wxBoxSizer* bsPlain;
wxStaticBoxSizer* bsStaticBox1;
wxStaticBoxSizer* bsStaticBox2;
Create(parent, id, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, _T("id"));
// Create the basic foundation: frame contains a standard box sizer (bsOuter)
// which contains a panel (Panel1) which contains a standard box sizer (bsInner)
bsOuter = new wxBoxSizer(wxHORIZONTAL);
Panel1 = new wxPanel(this, wxID_ANY);
bsInner = new wxBoxSizer(wxHORIZONTAL);
// Create a standard sizer containing a listbox and place it in the inner sizer
bsPlain = new wxBoxSizer(wxHORIZONTAL);
lbPlain = new wxListBox(Panel1, wxID_ANY);
lbPlain->SetMinSize(wxSize(200,400));
bsPlain->Add(lbPlain, 1, wxALL|wxEXPAND, 5);
bsInner->Add(bsPlain, 1, wxALL|wxEXPAND, 5);
// Create a Static Box sizer containing a listbox and place it in the inner sizer
// (next to the "plain" sizer created above). Note that the list box it contains is
// created according to the pre-2.9.1 rules, i.e., parent is Panel1
bsStaticBox1 = new wxStaticBoxSizer(wxHORIZONTAL, Panel1, _("Static Box Sizer 1"));
lbStatic1 = new wxListBox(Panel1, wxID_ANY);
bsStaticBox1->Add(lbStatic1, 1, wxALL|wxEXPAND, 5);
bsInner->Add(bsStaticBox1, 1, wxALL|wxEXPAND, 5);
// Create another Static Box sizer containing a listbox and place it next to the
// bsStaticBox1 created above. Note that the list box this one contains is
// created according to the 2.9.1 and above rules, i.e., parent is the wxStaticBox
// contained within the Static Box sizer.
bsStaticBox2 = new wxStaticBoxSizer(wxHORIZONTAL, Panel1, _("Static Box Sizer 2"));
lbStatic2 = new wxListBox(bsStaticBox2->GetStaticBox(), wxID_ANY);
bsStaticBox2->Add(lbStatic2, 1, wxALL|wxEXPAND, 5);
bsInner->Add(bsStaticBox2, 1, wxALL|wxEXPAND, 5);
Panel1->SetSizer(bsInner);
bsInner->Fit(Panel1);
bsInner->SetSizeHints(Panel1);
bsOuter->Add(Panel1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
SetSizer(bsOuter);
bsOuter->Fit(this);
bsOuter->SetSizeHints(this);
lbPlain->SetDropTarget(new DF(lbPlain));
lbStatic1->SetDropTarget(new DF(lbStatic2));
lbStatic2->SetDropTarget(new DF(lbStatic2));
}
testFrame::~testFrame()
{
}
void testFrame::OnQuit(wxCommandEvent& event)
{
Close();
}
DF::DF ( wxListBox * lb_target )
{
m_target = lb_target;
}
bool DF::OnDropFiles ( wxCoord x, wxCoord y, const wxArrayString & files )
{
m_target->Append(files);
return true;
}
