src/gtk/filedlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/filedlg.cpp
   3 // Purpose:     native implementation of wxFileDialog
   4 // Author:      Robert Roebling, Zbigniew Zagorski, Mart Raudsepp
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, 2004 Zbigniew Zagorski, 2005 Mart Raudsepp
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #if wxUSE_FILEDLG
  14
  15 #include "wx/filedlg.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/msgdlg.h"
  20 #endif
  21
  22 #include <gtk/gtk.h>
  23 #include "wx/gtk/private.h"
  24
  25 #include <unistd.h> // chdir
  26
  27 #include "wx/filename.h" // wxFilename
  28 #include "wx/tokenzr.h" // wxStringTokenizer
  29 #include "wx/filefn.h" // ::wxGetCwd
  30
  31 //-----------------------------------------------------------------------------
  32 // "clicked" for OK-button
  33 //-----------------------------------------------------------------------------
  34
  35 extern "C" {
  36 static void gtk_filedialog_ok_callback(GtkWidget *widget, wxFileDialog *dialog)
  37 {
  38     int style = dialog->GetWindowStyle();
  39     wxGtkString filename(gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(widget)));
  40
  41     // gtk version numbers must be identical with the one in ctor (that calls set_do_overwrite_confirmation)
  42 #if GTK_CHECK_VERSION(2,7,3)
  43     if (gtk_check_version(2, 7, 3) != NULL)
  44 #endif
  45     {
  46         if ((style & wxFD_SAVE) && (style & wxFD_OVERWRITE_PROMPT))
  47         {
  48             if ( g_file_test(filename, G_FILE_TEST_EXISTS) )
  49             {
  50                 wxString msg;
  51
  52                 msg.Printf(
  53                     _("File '%s' already exists, do you really want to overwrite it?"),
  54                     wxString(filename, *wxConvFileName));
  55
  56                 wxMessageDialog dlg(dialog, msg, _("Confirm"),
  57                                    wxYES_NO | wxICON_QUESTION);
  58                 if (dlg.ShowModal() != wxID_YES)
  59                     return;
  60             }
  61         }
  62     }
  63
  64     if (style & wxFD_FILE_MUST_EXIST)
  65     {
  66         if ( !g_file_test(filename, G_FILE_TEST_EXISTS) )
  67         {
  68             wxMessageDialog dlg( dialog, _("Please choose an existing file."),
  69                                  _("Error"), wxOK| wxICON_ERROR);
  70             dlg.ShowModal();
  71             return;
  72         }
  73     }
  74
  75     // change to the directory where the user went if asked
  76     if (style & wxFD_CHANGE_DIR)
  77     {
  78         // Use chdir to not care about filename encodings
  79         wxGtkString folder(g_path_get_dirname(filename));
  80         chdir(folder);
  81     }
  82
  83     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK);
  84     event.SetEventObject(dialog);
  85     dialog->HandleWindowEvent(event);
  86 }
  87 }
  88
  89 //-----------------------------------------------------------------------------
  90 // "clicked" for Cancel-button
  91 //-----------------------------------------------------------------------------
  92
  93 extern "C"
  94 {
  95
  96 static void
  97 gtk_filedialog_cancel_callback(GtkWidget * WXUNUSED(w), wxFileDialog *dialog)
  98 {
  99     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 100     event.SetEventObject(dialog);
 101     dialog->HandleWindowEvent(event);
 102 }
 103
 104 static void gtk_filedialog_response_callback(GtkWidget *w,
 105                                              gint response,
 106                                              wxFileDialog *dialog)
 107 {
 108     if (response == GTK_RESPONSE_ACCEPT)
 109         gtk_filedialog_ok_callback(w, dialog);
 110     else    // GTK_RESPONSE_CANCEL or GTK_RESPONSE_NONE
 111         gtk_filedialog_cancel_callback(w, dialog);
 112 }
 113
 114 static void gtk_filedialog_update_preview_callback(GtkFileChooser *chooser,
 115                                                    gpointer user_data)
 116 {
 117     GtkWidget *preview = GTK_WIDGET(user_data);
 118
 119     wxGtkString filename(gtk_file_chooser_get_preview_filename(chooser));
 120
 121     if ( !filename )
 122         return;
 123
 124     GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file_at_size(filename, 128, 128, NULL);
 125     gboolean have_preview = pixbuf != NULL;
 126
 127     gtk_image_set_from_pixbuf(GTK_IMAGE(preview), pixbuf);
 128     if ( pixbuf )
 129         g_object_unref (pixbuf);
 130
 131     gtk_file_chooser_set_preview_widget_active(chooser, have_preview);
 132 }
 133
 134 } // extern "C"
 135
 136 //-----------------------------------------------------------------------------
 137 // "size_request" from m_extraControl
 138 //-----------------------------------------------------------------------------
 139
 140 extern "C" {
 141 static void extra_widget_size_request(GtkWidget*, GtkRequisition* req, wxWindow* win)
 142 {
 143     // allow dialog to be resized smaller horizontally
 144     req->width = win->GetMinWidth();
 145 }
 146 }
 147
 148 void wxFileDialog::AddChildGTK(wxWindowGTK* child)
 149 {
 150     g_signal_connect_after(child->m_widget, "size_request",
 151         G_CALLBACK(extra_widget_size_request), child);
 152     gtk_file_chooser_set_extra_widget(
 153         GTK_FILE_CHOOSER(m_widget), child->m_widget);
 154 }
 155
 156 //-----------------------------------------------------------------------------
 157 // wxFileDialog
 158 //-----------------------------------------------------------------------------
 159
 160 IMPLEMENT_DYNAMIC_CLASS(wxFileDialog,wxFileDialogBase)
 161
 162 BEGIN_EVENT_TABLE(wxFileDialog,wxFileDialogBase)
 163     EVT_BUTTON(wxID_OK, wxFileDialog::OnFakeOk)
 164     EVT_SIZE(wxFileDialog::OnSize)
 165 END_EVENT_TABLE()
 166
 167 wxFileDialog::wxFileDialog(wxWindow *parent, const wxString& message,
 168                            const wxString& defaultDir,
 169                            const wxString& defaultFileName,
 170                            const wxString& wildCard,
 171                            long style, const wxPoint& pos,
 172                            const wxSize& sz,
 173                            const wxString& name)
 174     : wxFileDialogBase()
 175 {
 176     parent = GetParentForModalDialog(parent);
 177
 178     if (!wxFileDialogBase::Create(parent, message, defaultDir, defaultFileName,
 179                                   wildCard, style, pos, sz, name))
 180     {
 181         return;
 182     }
 183
 184     if (!PreCreation(parent, pos, wxDefaultSize) ||
 185         !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
 186                 wxDefaultValidator, wxT("filedialog")))
 187     {
 188         wxFAIL_MSG( wxT("wxFileDialog creation failed") );
 189         return;
 190     }
 191
 192     GtkFileChooserAction gtk_action;
 193     GtkWindow* gtk_parent = NULL;
 194     if (parent)
 195         gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );
 196
 197     const gchar* ok_btn_stock;
 198     if ( style & wxFD_SAVE )
 199     {
 200         gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;
 201         ok_btn_stock = GTK_STOCK_SAVE;
 202     }
 203     else
 204     {
 205         gtk_action = GTK_FILE_CHOOSER_ACTION_OPEN;
 206         ok_btn_stock = GTK_STOCK_OPEN;
 207     }
 208
 209     m_widget = gtk_file_chooser_dialog_new(
 210                    wxGTK_CONV(m_message),
 211                    gtk_parent,
 212                    gtk_action,
 213                    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
 214                    ok_btn_stock, GTK_RESPONSE_ACCEPT,
 215                    NULL);
 216     g_object_ref(m_widget);
 217     GtkFileChooser* file_chooser = GTK_FILE_CHOOSER(m_widget);
 218
 219     m_fc.SetWidget(file_chooser);
 220
 221     gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);
 222
 223     if ( style & wxFD_MULTIPLE )
 224         gtk_file_chooser_set_select_multiple(file_chooser, true);
 225
 226     // gtk_widget_hide_on_delete is used here to avoid that Gtk automatically
 227     // destroys the dialog when the user press ESC on the dialog: in that case
 228     // a second call to ShowModal() would result in a bunch of Gtk-CRITICAL
 229     // errors...
 230     g_signal_connect(m_widget,
 231                     "delete_event",
 232                     G_CALLBACK (gtk_widget_hide_on_delete),
 233                     this);
 234
 235     // local-only property could be set to false to allow non-local files to be
 236     // loaded. In that case get/set_uri(s) should be used instead of
 237     // get/set_filename(s) everywhere and the GtkFileChooserDialog should
 238     // probably also be created with a backend, e.g "gnome-vfs", "default", ...
 239     // (gtk_file_chooser_dialog_new_with_backend). Currently local-only is kept
 240     // as the default - true:
 241     // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);
 242
 243     g_signal_connect (m_widget, "response",
 244         G_CALLBACK (gtk_filedialog_response_callback), this);
 245
 246
 247     // deal with extensions/filters
 248     SetWildcard(wildCard);
 249
 250     wxString defaultFileNameWithExt = defaultFileName;
 251     if ( !wildCard.empty() && !defaultFileName.empty() &&
 252             !wxFileName(defaultFileName).HasExt() )
 253     {
 254         // append the default extension to the initial file name: GTK won't do
 255         // it for us by default (unlike e.g. MSW)
 256         const wxString defaultExt = m_fc.GetCurrentWildCard().AfterFirst('.');
 257         if ( defaultExt.find_first_of("?*") == wxString::npos )
 258             defaultFileNameWithExt += "." + defaultExt;
 259     }
 260
 261
 262     // if defaultDir is specified it should contain the directory and
 263     // defaultFileName should contain the default name of the file, however if
 264     // directory is not given, defaultFileName contains both
 265     wxFileName fn;
 266     if ( defaultDir.empty() )
 267         fn.Assign(defaultFileNameWithExt);
 268     else if ( !defaultFileNameWithExt.empty() )
 269         fn.Assign(defaultDir, defaultFileNameWithExt);
 270     else
 271         fn.AssignDir(defaultDir);
 272
 273     // set the initial file name and/or directory
 274     fn.MakeAbsolute(); // GTK+ needs absolute path
 275     const wxString dir = fn.GetPath();
 276     if ( !dir.empty() )
 277     {
 278         gtk_file_chooser_set_current_folder(file_chooser, dir.fn_str());
 279     }
 280
 281     const wxString fname = fn.GetFullName();
 282     if ( style & wxFD_SAVE )
 283     {
 284         if ( !fname.empty() )
 285         {
 286             gtk_file_chooser_set_current_name(file_chooser, fname.fn_str());
 287         }
 288
 289 #if GTK_CHECK_VERSION(2,7,3)
 290         if ((style & wxFD_OVERWRITE_PROMPT) && !gtk_check_version(2,7,3))
 291             gtk_file_chooser_set_do_overwrite_confirmation(file_chooser, true);
 292 #endif
 293     }
 294     else // wxFD_OPEN
 295     {
 296         if ( !fname.empty() )
 297         {
 298             gtk_file_chooser_set_filename(file_chooser,
 299                                           fn.GetFullPath().fn_str());
 300         }
 301     }
 302
 303     if ( style & wxFD_PREVIEW )
 304     {
 305         GtkWidget *previewImage = gtk_image_new();
 306
 307         gtk_file_chooser_set_preview_widget(file_chooser, previewImage);
 308         g_signal_connect(m_widget, "update-preview",
 309                          G_CALLBACK(gtk_filedialog_update_preview_callback),
 310                          previewImage);
 311     }
 312 }
 313
 314 wxFileDialog::~wxFileDialog()
 315 {
 316     if (m_extraControl)
 317     {
 318         // get chooser to drop its reference right now, allowing wxWindow dtor
 319         // to verify that ref count drops to zero
 320         gtk_file_chooser_set_extra_widget(
 321             GTK_FILE_CHOOSER(m_widget), NULL);
 322     }
 323 }
 324
 325 void wxFileDialog::OnFakeOk(wxCommandEvent& WXUNUSED(event))
 326 {
 327     EndDialog(wxID_OK);
 328 }
 329
 330 int wxFileDialog::ShowModal()
 331 {
 332     CreateExtraControl();
 333
 334     return wxDialog::ShowModal();
 335 }
 336
 337 void wxFileDialog::DoSetSize(int WXUNUSED(x), int WXUNUSED(y),
 338                              int WXUNUSED(width), int WXUNUSED(height),
 339                              int WXUNUSED(sizeFlags))
 340 {
 341 }
 342
 343 void wxFileDialog::OnSize(wxSizeEvent&)
 344 {
 345     // avoid calling DoLayout(), which will set the (wrong) size of
 346     // m_extraControl, its size is managed by GtkFileChooser
 347 }
 348
 349 wxString wxFileDialog::GetPath() const
 350 {
 351     return m_fc.GetPath();
 352 }
 353
 354 void wxFileDialog::GetFilenames(wxArrayString& files) const
 355 {
 356     m_fc.GetFilenames( files );
 357 }
 358
 359 void wxFileDialog::GetPaths(wxArrayString& paths) const
 360 {
 361     m_fc.GetPaths( paths );
 362 }
 363
 364 void wxFileDialog::SetMessage(const wxString& message)
 365 {
 366     m_message = message;
 367     SetTitle(message);
 368 }
 369
 370 void wxFileDialog::SetPath(const wxString& path)
 371 {
 372     // we need an absolute path for GTK native chooser so ensure that we have
 373     // it
 374     wxFileName fn(path);
 375     fn.MakeAbsolute();
 376     m_fc.SetPath(fn.GetFullPath());
 377 }
 378
 379 void wxFileDialog::SetDirectory(const wxString& dir)
 380 {
 381     if (m_fc.SetDirectory( dir ))
 382     {
 383         // Cache the dir, as gtk_file_chooser_get_current_folder()
 384         // doesn't return anything until the dialog has been shown
 385         m_dir = dir;
 386     }
 387 }
 388
 389 wxString wxFileDialog::GetDirectory() const
 390 {
 391     wxString currentDir( m_fc.GetDirectory() );
 392     if (currentDir.empty())
 393     {
 394         // m_fc.GetDirectory() will return empty until the dialog has been shown
 395         // in which case use any previously provided value
 396         currentDir = m_dir;
 397     }
 398     return currentDir;
 399 }
 400
 401 void wxFileDialog::SetFilename(const wxString& name)
 402 {
 403     if (HasFdFlag(wxFD_SAVE))
 404     {
 405         gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(m_widget), wxGTK_CONV(name));
 406         m_fileName = name;
 407     }
 408
 409     else
 410     {
 411         wxString path( GetDirectory() );
 412         if (path.empty())
 413         {
 414             // SetPath() fires an assert if fed other than filepaths
 415             return;
 416         }
 417         SetPath(wxFileName(path, name).GetFullPath());
 418         m_fileName = name;
 419     }
 420 }
 421
 422 wxString wxFileDialog::GetFilename() const
 423 {
 424     wxString currentFilename( m_fc.GetFilename() );
 425     if (currentFilename.empty())
 426     {
 427         // m_fc.GetFilename() will return empty until the dialog has been shown
 428         // in which case use any previously provided value
 429         currentFilename = m_fileName;
 430     }
 431     return currentFilename;
 432 }
 433
 434 void wxFileDialog::SetWildcard(const wxString& wildCard)
 435 {
 436     m_fc.SetWildcard( wildCard );
 437 }
 438
 439 void wxFileDialog::SetFilterIndex(int filterIndex)
 440 {
 441
 442     m_fc.SetFilterIndex( filterIndex);
 443 }
 444
 445 int wxFileDialog::GetFilterIndex() const
 446 {
 447     return m_fc.GetFilterIndex();
 448 }
 449
 450 #endif // wxUSE_FILEDLG