Prevent crash when m_defGridAttr is NULL

[wxWidgets.git] / src / generic / dirdlgg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dirdlg.cpp
// Purpose:     wxDirDialog
// Author:      Harm van der Heijden, Robert Roebling & Julian Smart
// Modified by:
// Created:     12/12/98
// RCS-ID:      $Id$
// Copyright:   (c) Harm van der Heijden, Robert Roebling, Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dirdlgg.h"
#endif


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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/defs.h"

#if wxUSE_DIRDLG

#ifndef WX_PRECOMP
    #include "wx/textctrl.h"
    #include "wx/button.h"
    #include "wx/sizer.h"
    #include "wx/statline.h"
    #include "wx/intl.h"
    #include "wx/log.h"
    #include "wx/msgdlg.h"
#endif

#include "wx/generic/dirctrlg.h"
#include "wx/generic/dirdlgg.h"

//-----------------------------------------------------------------------------
// wxGenericDirDialog
//-----------------------------------------------------------------------------

static const int ID_DIRCTRL = 1000;
static const int ID_TEXTCTRL = 1001;
static const int ID_OK = 1002;
static const int ID_CANCEL = 1003;
static const int ID_NEW = 1004;
//static const int ID_CHECK = 1005;

BEGIN_EVENT_TABLE(wxGenericDirDialog, wxDialog)
    EVT_BUTTON               (wxID_OK,  wxGenericDirDialog::OnOK)
    EVT_BUTTON               (wxID_NEW,     wxGenericDirDialog::OnNew)
    EVT_CLOSE                (wxGenericDirDialog::OnCloseWindow)
    EVT_TREE_KEY_DOWN        (-1,   wxGenericDirDialog::OnTreeKeyDown)
    EVT_TREE_SEL_CHANGED     (-1,   wxGenericDirDialog::OnTreeSelected)
    EVT_TEXT_ENTER           (ID_TEXTCTRL,  wxGenericDirDialog::OnOK)
END_EVENT_TABLE()

wxGenericDirDialog::wxGenericDirDialog(wxWindow* parent, const wxString& title,
                                       const wxString& defaultPath, long style,
                                       const wxPoint& pos, const wxSize& sz, 
                                       const wxString& name):
                wxDialog(parent, ID_DIRCTRL, title, pos, sz, style, name)
{
    wxBusyCursor cursor;

    m_path = defaultPath;
    if (m_path == wxT("~"))
        wxGetHomeDir( &m_path );

    wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );

    // 1) dir ctrl
    m_dirCtrl = NULL; // this is neccessary, event handler called from 
                      // wxGenericDirCtrl would crash otherwise!
    m_dirCtrl = new wxGenericDirCtrl(this, ID_DIRCTRL,
                                     m_path, wxPoint(5, 5),
                                     wxSize(300, 200), 
                                     wxDIRCTRL_DIR_ONLY|wxSUNKEN_BORDER);

    topsizer->Add( m_dirCtrl, 1, wxTOP|wxLEFT|wxRIGHT | wxEXPAND, 10 );

    // 2) text ctrl
    m_input = new wxTextCtrl( this, ID_TEXTCTRL, m_path, wxDefaultPosition );
    topsizer->Add( m_input, 0, wxTOP|wxLEFT|wxRIGHT | wxEXPAND, 10 );

#if wxUSE_STATLINE
    // 3) Static line
    topsizer->Add( new wxStaticLine( this, -1 ), 0, wxEXPAND | wxLEFT|wxRIGHT|wxTOP, 10 );
#endif

    // 4) Buttons
    wxSizer* buttonsizer = new wxBoxSizer( wxHORIZONTAL );
    wxButton* okButton = new wxButton(this, wxID_OK, _("OK"));
    buttonsizer->Add( okButton, 0, wxLEFT|wxRIGHT, 10 );
    wxButton* cancelButton = new wxButton(this, wxID_CANCEL, _("Cancel"));
    buttonsizer->Add( cancelButton, 0, wxLEFT|wxRIGHT, 10 );

    // I'm not convinced we need a New button, and we tend to get annoying
    // accidental-editing with label editing enabled.
    wxButton* newButton = new wxButton( this, wxID_NEW, _("New...") );
    buttonsizer->Add( newButton, 0, wxLEFT|wxRIGHT, 10 );

    topsizer->Add( buttonsizer, 0, wxALL | wxCENTER, 10 );

    okButton->SetDefault();
    m_dirCtrl->SetFocus();

    SetAutoLayout( TRUE );
    SetSizer( topsizer );

    topsizer->SetSizeHints( this );
    topsizer->Fit( this );

    Centre( wxBOTH );
}

void wxGenericDirDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
    EndModal(wxID_CANCEL);
}

void wxGenericDirDialog::OnOK(wxCommandEvent& WXUNUSED(event))
{
    m_path = m_input->GetValue();
    // Does the path exist? (User may have typed anything in m_input)
    if (wxPathExists(m_path)) {
        // OK, path exists, we're done.
        EndModal(wxID_OK);
        return;
    }
    // Interact with user, find out if the dir is a typo or to be created
    wxString msg;
    msg.Printf(_("The directory '%s' does not exist\nCreate it now?"), 
               m_path.c_str());
    wxMessageDialog dialog(this, msg, _("Directory does not exist"), 
                           wxYES_NO | wxICON_WARNING);

    if ( dialog.ShowModal() == wxID_YES ) {
        // Okay, let's make it
        wxLogNull log;
        if (wxMkdir(m_path)) {
            // The new dir was created okay.
            EndModal(wxID_OK);
            return;
        }
        else {
            // Trouble...
            msg.Printf(_("Failed to create directory '%s'\n(Do you have the required permissions?)"), 
                       m_path.c_str());
            wxMessageDialog errmsg(this, msg, _("Error creating directory"), wxOK | wxICON_ERROR);
            errmsg.ShowModal();
            // We still don't have a valid dir. Back to the main dialog.
        }
    }
    // User has answered NO to create dir.
}

void wxGenericDirDialog::SetPath(const wxString& path)
{
    m_dirCtrl->SetPath(path);
    m_path = path;
}

wxString wxGenericDirDialog::GetPath(void) const
{
    return m_path;
}

int wxGenericDirDialog::ShowModal()
{
    m_input->SetValue( m_path );
    return wxDialog::ShowModal();
}

void wxGenericDirDialog::OnTreeSelected( wxTreeEvent &event )
{
    if (!m_dirCtrl)
        return;

    wxDirItemData *data = (wxDirItemData*)m_dirCtrl->GetTreeCtrl()->GetItemData(event.GetItem());
    if (data)
       m_input->SetValue( data->m_path );
};

void wxGenericDirDialog::OnTreeKeyDown( wxTreeEvent &WXUNUSED(event) )
{
    if (!m_dirCtrl)
        return;

    wxDirItemData *data = (wxDirItemData*)m_dirCtrl->GetTreeCtrl()->GetItemData(m_dirCtrl->GetTreeCtrl()->GetSelection());
    if (data)
        m_input->SetValue( data->m_path );
};

void wxGenericDirDialog::OnNew( wxCommandEvent& WXUNUSED(event) )
{
    wxTreeItemId id = m_dirCtrl->GetTreeCtrl()->GetSelection();
    if ((id == m_dirCtrl->GetTreeCtrl()->GetRootItem()) ||
        (m_dirCtrl->GetTreeCtrl()->GetParent(id) == m_dirCtrl->GetTreeCtrl()->GetRootItem()))
    {
        wxMessageDialog msg(this, _("You cannot add a new directory to this section."),
                            _("Create directory"), wxOK | wxICON_INFORMATION );
        msg.ShowModal();
        return;
    }

    wxTreeItemId parent = id ; // m_dirCtrl->GetTreeCtrl()->GetParent( id );
    wxDirItemData *data = (wxDirItemData*)m_dirCtrl->GetTreeCtrl()->GetItemData( parent );
    wxASSERT( data );

    wxString new_name( _("NewName") );
    wxString path( data->m_path );
    if (path.Last() != wxFILE_SEP_PATH)
        path += wxFILE_SEP_PATH;
    path += new_name;
    if (wxFileExists(path))
    {
        // try NewName0, NewName1 etc.
        int i = 0;
        do {
            new_name = _("NewName");
            wxString num;
            num.Printf( wxT("%d"), i );
            new_name += num;

            path = data->m_path;
            if (path.Last() != wxFILE_SEP_PATH)
                path += wxFILE_SEP_PATH;
            path += new_name;
            i++;
        } while (wxFileExists(path));
    }

    wxLogNull log;
    if (!wxMkdir(path))
    {
        wxMessageDialog dialog(this, _("Operation not permitted."), _("Error"), wxOK | wxICON_ERROR );
        dialog.ShowModal();
        return;
    }

    wxDirItemData *new_data = new wxDirItemData( path, new_name, TRUE );

    // TODO: THIS CODE DOESN'T WORK YET. We need to avoid duplication of the first child
    // of the parent.
    wxTreeItemId new_id = m_dirCtrl->GetTreeCtrl()->AppendItem( parent, new_name, 0, 0, new_data );
    m_dirCtrl->GetTreeCtrl()->EnsureVisible( new_id );
    m_dirCtrl->GetTreeCtrl()->EditLabel( new_id );
}

#endif // wxUSE_DIRDLG