Fix double deletion bug in wxGTK wxDVC dnd code.

[wxWidgets.git] / src / gtk / dirdlg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/gtk/dirdlg.cpp
// Purpose:     native implementation of wxDirDialog
// Author:      Robert Roebling, Zbigniew Zagorski, Mart Raudsepp, Francesco Montorsi
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling, 2004 Zbigniew Zagorski, 2005 Mart Raudsepp
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"



/*
  NOTE: the GtkFileChooser interface can be used both for wxFileDialog and for wxDirDialog.
        Thus following code is very similar (even if not identic) to src/gtk/filedlg.cpp
        If you find a problem in this code, remember to check also that file !
*/



#if wxUSE_DIRDLG

#include "wx/dirdlg.h"

#ifndef WX_PRECOMP
    #include "wx/intl.h"
    #include "wx/filedlg.h"
#endif

#include "wx/gtk/private.h"

#include <unistd.h> // chdir

//-----------------------------------------------------------------------------
// "clicked" for OK-button
//-----------------------------------------------------------------------------

extern "C" {
static void gtk_dirdialog_ok_callback(GtkWidget *widget, wxDirDialog *dialog)
{
    // change to the directory where the user went if asked
    if (dialog->HasFlag(wxDD_CHANGE_DIR))
    {
        wxGtkString filename(gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(widget)));
        chdir(filename);
    }

    wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK);
    event.SetEventObject(dialog);
    dialog->HandleWindowEvent(event);
}
}

//-----------------------------------------------------------------------------
// "clicked" for Cancel-button
//-----------------------------------------------------------------------------

extern "C" {
static void gtk_dirdialog_cancel_callback(GtkWidget *WXUNUSED(w),
                                           wxDirDialog *dialog)
{
    wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
    event.SetEventObject(dialog);
    dialog->HandleWindowEvent(event);
}
}

extern "C" {
static void gtk_dirdialog_response_callback(GtkWidget *w,
                                             gint response,
                                             wxDirDialog *dialog)
{
    if (response == GTK_RESPONSE_ACCEPT)
        gtk_dirdialog_ok_callback(w, dialog);
    else // GTK_RESPONSE_CANCEL or GTK_RESPONSE_NONE
        gtk_dirdialog_cancel_callback(w, dialog);
}
}

//-----------------------------------------------------------------------------
// wxDirDialog
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxDirDialog, wxDialog)

BEGIN_EVENT_TABLE(wxDirDialog, wxDirDialogBase)
    EVT_BUTTON(wxID_OK, wxDirDialog::OnFakeOk)
END_EVENT_TABLE()

wxDirDialog::wxDirDialog(wxWindow* parent,
                         const wxString& title,
                         const wxString& defaultPath,
                         long style,
                         const wxPoint& pos,
                         const wxSize& WXUNUSED(sz),
                         const wxString& WXUNUSED(name))
{
    m_message = title;

    parent = GetParentForModalDialog(parent, style);

    if (!PreCreation(parent, pos, wxDefaultSize) ||
        !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
                wxDefaultValidator, wxT("dirdialog")))
    {
        wxFAIL_MSG( wxT("wxDirDialog creation failed") );
        return;
    }

    GtkWindow* gtk_parent = NULL;
    if (parent)
        gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );

    m_widget = gtk_file_chooser_dialog_new(
                   wxGTK_CONV(m_message),
                   gtk_parent,
                   GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
                   GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                   GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
                   NULL);
    g_object_ref(m_widget);

    gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);

    // gtk_widget_hide_on_delete is used here to avoid that Gtk automatically destroys
    // the dialog when the user press ESC on the dialog: in that case a second call to
    // ShowModal() would result in a bunch of Gtk-CRITICAL errors...
    g_signal_connect (G_OBJECT(m_widget),
                    "delete_event",
                    G_CALLBACK (gtk_widget_hide_on_delete),
                    (gpointer)this);

    // local-only property could be set to false to allow non-local files to be loaded.
    // In that case get/set_uri(s) should be used instead of get/set_filename(s) everywhere
    // and the GtkFileChooserDialog should probably also be created with a backend,
    // e.g. "gnome-vfs", "default", ... (gtk_file_chooser_dialog_new_with_backend).
    // Currently local-only is kept as the default - true:
    // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);

    g_signal_connect (m_widget, "response",
        G_CALLBACK (gtk_dirdialog_response_callback), this);

    if ( !defaultPath.empty() )
        gtk_file_chooser_set_current_folder( GTK_FILE_CHOOSER(m_widget),
                defaultPath.fn_str() );
}

void wxDirDialog::OnFakeOk(wxCommandEvent& WXUNUSED(event))
{
    EndDialog(wxID_OK);
}

void wxDirDialog::DoSetSize(int x, int y, int width, int height, int sizeFlags)
{
    if (!m_wxwindow)
        return;

    wxDirDialogBase::DoSetSize( x, y, width, height, sizeFlags );
}

void wxDirDialog::SetPath(const wxString& dir)
{
    if (wxDirExists(dir))
    {
        gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(m_widget),
                                            dir.fn_str());
    }
}

wxString wxDirDialog::GetPath() const
{
    wxGtkString str(gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(m_widget)));
    return wxString::FromUTF8(str);
}

#endif // wxUSE_DIRDLG