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 #ifdef __UNIX__
  26 #include <unistd.h> // chdir
  27 #endif
  28
  29 #include "wx/filename.h" // wxFilename
  30 #include "wx/tokenzr.h" // wxStringTokenizer
  31 #include "wx/filefn.h" // ::wxGetCwd
  32
  33 //-----------------------------------------------------------------------------
  34 // "clicked" for OK-button
  35 //-----------------------------------------------------------------------------
  36
  37 extern "C" {
  38 static void gtk_filedialog_ok_callback(GtkWidget *widget, wxFileDialog *dialog)
  39 {
  40     int style = dialog->GetWindowStyle();
  41     wxGtkString filename(gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(widget)));
  42
  43     // gtk version numbers must be identical with the one in ctor (that calls set_do_overwrite_confirmation)
  44 #if GTK_CHECK_VERSION(2,7,3)
  45     if (gtk_check_version(2, 7, 3) != NULL)
  46 #endif
  47     {
  48         if ((style & wxFD_SAVE) && (style & wxFD_OVERWRITE_PROMPT))
  49         {
  50             if ( g_file_test(filename, G_FILE_TEST_EXISTS) )
  51             {
  52                 wxString msg;
  53
  54                 msg.Printf(
  55                     _("File '%s' already exists, do you really want to overwrite it?"),
  56                     wxString::FromUTF8(filename));
  57
  58                 wxMessageDialog dlg(dialog, msg, _("Confirm"),
  59                                    wxYES_NO | wxICON_QUESTION);
  60                 if (dlg.ShowModal() != wxID_YES)
  61                     return;
  62             }
  63         }
  64     }
  65
  66     if (style & wxFD_FILE_MUST_EXIST)
  67     {
  68         if ( !g_file_test(filename, G_FILE_TEST_EXISTS) )
  69         {
  70             wxMessageDialog dlg( dialog, _("Please choose an existing file."),
  71                                  _("Error"), wxOK| wxICON_ERROR);
  72             dlg.ShowModal();
  73             return;
  74         }
  75     }
  76
  77     // change to the directory where the user went if asked
  78     if (style & wxFD_CHANGE_DIR)
  79     {
  80         // Use chdir to not care about filename encodings
  81         wxGtkString folder(g_path_get_dirname(filename));
  82         chdir(folder);
  83     }
  84
  85     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_OK);
  86     event.SetEventObject(dialog);
  87     dialog->HandleWindowEvent(event);
  88 }
  89 }
  90
  91 //-----------------------------------------------------------------------------
  92 // "clicked" for Cancel-button
  93 //-----------------------------------------------------------------------------
  94
  95 extern "C"
  96 {
  97
  98 static void
  99 gtk_filedialog_cancel_callback(GtkWidget * WXUNUSED(w), wxFileDialog *dialog)
 100 {
 101     wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, wxID_CANCEL);
 102     event.SetEventObject(dialog);
 103     dialog->HandleWindowEvent(event);
 104 }
 105
 106 static void gtk_filedialog_response_callback(GtkWidget *w,
 107                                              gint response,
 108                                              wxFileDialog *dialog)
 109 {
 110     if (response == GTK_RESPONSE_ACCEPT)
 111         gtk_filedialog_ok_callback(w, dialog);
 112     else    // GTK_RESPONSE_CANCEL or GTK_RESPONSE_NONE
 113         gtk_filedialog_cancel_callback(w, dialog);
 114 }
 115
 116 static void gtk_filedialog_update_preview_callback(GtkFileChooser *chooser,
 117                                                    gpointer user_data)
 118 {
 119     GtkWidget *preview = GTK_WIDGET(user_data);
 120
 121     wxGtkString filename(gtk_file_chooser_get_preview_filename(chooser));
 122
 123     if ( !filename )
 124         return;
 125
 126     GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file_at_size(filename, 128, 128, NULL);
 127     gboolean have_preview = pixbuf != NULL;
 128
 129     gtk_image_set_from_pixbuf(GTK_IMAGE(preview), pixbuf);
 130     if ( pixbuf )
 131         g_object_unref (pixbuf);
 132
 133     gtk_file_chooser_set_preview_widget_active(chooser, have_preview);
 134 }
 135
 136 } // extern "C"
 137
 138 //-----------------------------------------------------------------------------
 139 // "size_request" from m_extraControl
 140 //-----------------------------------------------------------------------------
 141
 142 extern "C" {
 143 static void extra_widget_size_request(GtkWidget*, GtkRequisition* req, wxWindow* win)
 144 {
 145     // allow dialog to be resized smaller horizontally
 146     req->width = win->GetMinWidth();
 147 }
 148 }
 149
 150 void wxFileDialog::AddChildGTK(wxWindowGTK* child)
 151 {
 152     g_signal_connect_after(child->m_widget, "size_request",
 153         G_CALLBACK(extra_widget_size_request), child);
 154     gtk_file_chooser_set_extra_widget(
 155         GTK_FILE_CHOOSER(m_widget), child->m_widget);
 156 }
 157
 158 //-----------------------------------------------------------------------------
 159 // wxFileDialog
 160 //-----------------------------------------------------------------------------
 161
 162 IMPLEMENT_DYNAMIC_CLASS(wxFileDialog,wxFileDialogBase)
 163
 164 BEGIN_EVENT_TABLE(wxFileDialog,wxFileDialogBase)
 165     EVT_BUTTON(wxID_OK, wxFileDialog::OnFakeOk)
 166     EVT_SIZE(wxFileDialog::OnSize)
 167 END_EVENT_TABLE()
 168
 169 wxFileDialog::wxFileDialog(wxWindow *parent, const wxString& message,
 170                            const wxString& defaultDir,
 171                            const wxString& defaultFileName,
 172                            const wxString& wildCard,
 173                            long style, const wxPoint& pos,
 174                            const wxSize& sz,
 175                            const wxString& name)
 176     : wxFileDialogBase()
 177 {
 178     parent = GetParentForModalDialog(parent, style);
 179
 180     if (!wxFileDialogBase::Create(parent, message, defaultDir, defaultFileName,
 181                                   wildCard, style, pos, sz, name))
 182     {
 183         return;
 184     }
 185
 186     if (!PreCreation(parent, pos, wxDefaultSize) ||
 187         !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
 188                 wxDefaultValidator, wxT("filedialog")))
 189     {
 190         wxFAIL_MSG( wxT("wxFileDialog creation failed") );
 191         return;
 192     }
 193
 194     GtkFileChooserAction gtk_action;
 195     GtkWindow* gtk_parent = NULL;
 196     if (parent)
 197         gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );
 198
 199     const gchar* ok_btn_stock;
 200     if ( style & wxFD_SAVE )
 201     {
 202         gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;
 203         ok_btn_stock = GTK_STOCK_SAVE;
 204     }
 205     else
 206     {
 207         gtk_action = GTK_FILE_CHOOSER_ACTION_OPEN;
 208         ok_btn_stock = GTK_STOCK_OPEN;
 209     }
 210
 211     m_widget = gtk_file_chooser_dialog_new(
 212                    wxGTK_CONV(m_message),
 213                    gtk_parent,
 214                    gtk_action,
 215                    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
 216                    ok_btn_stock, GTK_RESPONSE_ACCEPT,
 217                    NULL);
 218     g_object_ref(m_widget);
 219     GtkFileChooser* file_chooser = GTK_FILE_CHOOSER(m_widget);
 220
 221     m_fc.SetWidget(file_chooser);
 222
 223     gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);
 224
 225     if ( style & wxFD_MULTIPLE )
 226         gtk_file_chooser_set_select_multiple(file_chooser, true);
 227
 228     // gtk_widget_hide_on_delete is used here to avoid that Gtk automatically
 229     // destroys the dialog when the user press ESC on the dialog: in that case
 230     // a second call to ShowModal() would result in a bunch of Gtk-CRITICAL
 231     // errors...
 232     g_signal_connect(m_widget,
 233                     "delete_event",
 234                     G_CALLBACK (gtk_widget_hide_on_delete),
 235                     this);
 236
 237     // local-only property could be set to false to allow non-local files to be
 238     // loaded. In that case get/set_uri(s) should be used instead of
 239     // get/set_filename(s) everywhere and the GtkFileChooserDialog should
 240     // probably also be created with a backend, e.g. "gnome-vfs", "default", ...
 241     // (gtk_file_chooser_dialog_new_with_backend). Currently local-only is kept
 242     // as the default - true:
 243     // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);
 244
 245     g_signal_connect (m_widget, "response",
 246         G_CALLBACK (gtk_filedialog_response_callback), this);
 247
 248
 249     // deal with extensions/filters
 250     SetWildcard(wildCard);
 251
 252     wxString defaultFileNameWithExt = defaultFileName;
 253     if ( !wildCard.empty() && !defaultFileName.empty() &&
 254             !wxFileName(defaultFileName).HasExt() )
 255     {
 256         // append the default extension to the initial file name: GTK won't do
 257         // it for us by default (unlike e.g. MSW)
 258         const wxString defaultExt = m_fc.GetCurrentWildCard().AfterFirst('.');
 259         if ( defaultExt.find_first_of("?*") == wxString::npos )
 260             defaultFileNameWithExt += "." + defaultExt;
 261     }
 262
 263
 264     // if defaultDir is specified it should contain the directory and
 265     // defaultFileName should contain the default name of the file, however if
 266     // directory is not given, defaultFileName contains both
 267     wxFileName fn;
 268     if ( defaultDir.empty() )
 269         fn.Assign(defaultFileNameWithExt);
 270     else if ( !defaultFileNameWithExt.empty() )
 271         fn.Assign(defaultDir, defaultFileNameWithExt);
 272     else
 273         fn.AssignDir(defaultDir);
 274
 275     // set the initial file name and/or directory
 276     fn.MakeAbsolute(); // GTK+ needs absolute path
 277     const wxString dir = fn.GetPath();
 278     if ( !dir.empty() )
 279     {
 280         gtk_file_chooser_set_current_folder(file_chooser, dir.fn_str());
 281     }
 282
 283     const wxString fname = fn.GetFullName();
 284     if ( style & wxFD_SAVE )
 285     {
 286         if ( !fname.empty() )
 287         {
 288             gtk_file_chooser_set_current_name(file_chooser, fname.fn_str());
 289         }
 290
 291 #if GTK_CHECK_VERSION(2,7,3)
 292         if ((style & wxFD_OVERWRITE_PROMPT) && !gtk_check_version(2,7,3))
 293             gtk_file_chooser_set_do_overwrite_confirmation(file_chooser, true);
 294 #endif
 295     }
 296     else // wxFD_OPEN
 297     {
 298         if ( !fname.empty() )
 299         {
 300             gtk_file_chooser_set_filename(file_chooser,
 301                                           fn.GetFullPath().fn_str());
 302         }
 303     }
 304
 305     if ( style & wxFD_PREVIEW )
 306     {
 307         GtkWidget *previewImage = gtk_image_new();
 308
 309         gtk_file_chooser_set_preview_widget(file_chooser, previewImage);
 310         g_signal_connect(m_widget, "update-preview",
 311                          G_CALLBACK(gtk_filedialog_update_preview_callback),
 312                          previewImage);
 313     }
 314 }
 315
 316 wxFileDialog::~wxFileDialog()
 317 {
 318     if (m_extraControl)
 319     {
 320         // get chooser to drop its reference right now, allowing wxWindow dtor
 321         // to verify that ref count drops to zero
 322         gtk_file_chooser_set_extra_widget(
 323             GTK_FILE_CHOOSER(m_widget), NULL);
 324     }
 325 }
 326
 327 void wxFileDialog::OnFakeOk(wxCommandEvent& WXUNUSED(event))
 328 {
 329     EndDialog(wxID_OK);
 330 }
 331
 332 int wxFileDialog::ShowModal()
 333 {
 334     CreateExtraControl();
 335
 336     return wxDialog::ShowModal();
 337 }
 338
 339 void wxFileDialog::DoSetSize(int WXUNUSED(x), int WXUNUSED(y),
 340                              int WXUNUSED(width), int WXUNUSED(height),
 341                              int WXUNUSED(sizeFlags))
 342 {
 343 }
 344
 345 void wxFileDialog::OnSize(wxSizeEvent&)
 346 {
 347     // avoid calling DoLayout(), which will set the (wrong) size of
 348     // m_extraControl, its size is managed by GtkFileChooser
 349 }
 350
 351 wxString wxFileDialog::GetPath() const
 352 {
 353     return m_fc.GetPath();
 354 }
 355
 356 void wxFileDialog::GetFilenames(wxArrayString& files) const
 357 {
 358     m_fc.GetFilenames( files );
 359 }
 360
 361 void wxFileDialog::GetPaths(wxArrayString& paths) const
 362 {
 363     m_fc.GetPaths( paths );
 364 }
 365
 366 void wxFileDialog::SetMessage(const wxString& message)
 367 {
 368     m_message = message;
 369     SetTitle(message);
 370 }
 371
 372 void wxFileDialog::SetPath(const wxString& path)
 373 {
 374     // Don't do anything if no path is specified, in particular don't set the
 375     // path to m_dir below as this would result in opening the dialog in the
 376     // parent directory of this one instead of m_dir itself.
 377     if ( path.empty() )
 378         return;
 379
 380     // we need an absolute path for GTK native chooser so ensure that we have
 381     // it: use the initial directory if it was set or just CWD otherwise (this
 382     // is the default behaviour if m_dir is empty)
 383     wxFileName fn(path);
 384     fn.MakeAbsolute(m_dir);
 385     m_fc.SetPath(fn.GetFullPath());
 386 }
 387
 388 void wxFileDialog::SetDirectory(const wxString& dir)
 389 {
 390     if (m_fc.SetDirectory( dir ))
 391     {
 392         // Cache the dir, as gtk_file_chooser_get_current_folder()
 393         // doesn't return anything until the dialog has been shown
 394         m_dir = dir;
 395     }
 396 }
 397
 398 wxString wxFileDialog::GetDirectory() const
 399 {
 400     wxString currentDir( m_fc.GetDirectory() );
 401     if (currentDir.empty())
 402     {
 403         // m_fc.GetDirectory() will return empty until the dialog has been shown
 404         // in which case use any previously provided value
 405         currentDir = m_dir;
 406     }
 407     return currentDir;
 408 }
 409
 410 void wxFileDialog::SetFilename(const wxString& name)
 411 {
 412     if (HasFdFlag(wxFD_SAVE))
 413     {
 414         gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(m_widget), wxGTK_CONV(name));
 415         m_fileName = name;
 416     }
 417
 418     else
 419     {
 420         wxString path( GetDirectory() );
 421         if (path.empty())
 422         {
 423             // SetPath() fires an assert if fed other than filepaths
 424             return;
 425         }
 426         SetPath(wxFileName(path, name).GetFullPath());
 427         m_fileName = name;
 428     }
 429 }
 430
 431 wxString wxFileDialog::GetFilename() const
 432 {
 433     wxString currentFilename( m_fc.GetFilename() );
 434     if (currentFilename.empty())
 435     {
 436         // m_fc.GetFilename() will return empty until the dialog has been shown
 437         // in which case use any previously provided value
 438         currentFilename = m_fileName;
 439     }
 440     return currentFilename;
 441 }
 442
 443 void wxFileDialog::SetWildcard(const wxString& wildCard)
 444 {
 445     wxFileDialogBase::SetWildcard(wildCard);
 446     m_fc.SetWildcard( GetWildcard() );
 447 }
 448
 449 void wxFileDialog::SetFilterIndex(int filterIndex)
 450 {
 451     m_fc.SetFilterIndex( filterIndex);
 452 }
 453
 454 int wxFileDialog::GetFilterIndex() const
 455 {
 456     return m_fc.GetFilterIndex();
 457 }
 458
 459 #endif // wxUSE_FILEDLG