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 static void wxInsertChildInFileDialog(wxWindow* parent, wxWindow* 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(parent->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     m_insertCallback = wxInsertChildInFileDialog;
 177     parent = GetParentForModalDialog(parent);
 178
 179     if (!wxFileDialogBase::Create(parent, message, defaultDir, defaultFileName,
 180                                   wildCard, style, pos, sz, name))
 181     {
 182         return;
 183     }
 184
 185     if (!PreCreation(parent, pos, wxDefaultSize) ||
 186         !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
 187                 wxDefaultValidator, wxT("filedialog")))
 188     {
 189         wxFAIL_MSG( wxT("wxFileDialog creation failed") );
 190         return;
 191     }
 192
 193     GtkFileChooserAction gtk_action;
 194     GtkWindow* gtk_parent = NULL;
 195     if (parent)
 196         gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );
 197
 198     const gchar* ok_btn_stock;
 199     if ( style & wxFD_SAVE )
 200     {
 201         gtk_action = GTK_FILE_CHOOSER_ACTION_SAVE;
 202         ok_btn_stock = GTK_STOCK_SAVE;
 203     }
 204     else
 205     {
 206         gtk_action = GTK_FILE_CHOOSER_ACTION_OPEN;
 207         ok_btn_stock = GTK_STOCK_OPEN;
 208     }
 209
 210     m_widget = gtk_file_chooser_dialog_new(
 211                    wxGTK_CONV(m_message),
 212                    gtk_parent,
 213                    gtk_action,
 214                    GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
 215                    ok_btn_stock, GTK_RESPONSE_ACCEPT,
 216                    NULL);
 217     g_object_ref(m_widget);
 218     GtkFileChooser* file_chooser = GTK_FILE_CHOOSER(m_widget);
 219
 220     m_fc.SetWidget(file_chooser);
 221
 222     gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);
 223
 224     if ( style & wxFD_MULTIPLE )
 225         gtk_file_chooser_set_select_multiple(file_chooser, true);
 226
 227     // gtk_widget_hide_on_delete is used here to avoid that Gtk automatically
 228     // destroys the dialog when the user press ESC on the dialog: in that case
 229     // a second call to ShowModal() would result in a bunch of Gtk-CRITICAL
 230     // errors...
 231     g_signal_connect(m_widget,
 232                     "delete_event",
 233                     G_CALLBACK (gtk_widget_hide_on_delete),
 234                     this);
 235
 236     // local-only property could be set to false to allow non-local files to be
 237     // loaded. In that case get/set_uri(s) should be used instead of
 238     // get/set_filename(s) everywhere and the GtkFileChooserDialog should
 239     // probably also be created with a backend, e.g "gnome-vfs", "default", ...
 240     // (gtk_file_chooser_dialog_new_with_backend). Currently local-only is kept
 241     // as the default - true:
 242     // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);
 243
 244     g_signal_connect (m_widget, "response",
 245         G_CALLBACK (gtk_filedialog_response_callback), this);
 246
 247     SetWildcard(wildCard);
 248
 249     // if defaultDir is specified it should contain the directory and
 250     // defaultFileName should contain the default name of the file, however if
 251     // directory is not given, defaultFileName contains both
 252     wxFileName fn;
 253     if ( defaultDir.empty() )
 254         fn.Assign(defaultFileName);
 255     else if ( !defaultFileName.empty() )
 256         fn.Assign(defaultDir, defaultFileName);
 257     else
 258         fn.AssignDir(defaultDir);
 259
 260     // set the initial file name and/or directory
 261     fn.MakeAbsolute(); // GTK+ needs absolute path
 262     const wxString dir = fn.GetPath();
 263     if ( !dir.empty() )
 264     {
 265         gtk_file_chooser_set_current_folder(file_chooser, dir.fn_str());
 266     }
 267
 268     const wxString fname = fn.GetFullName();
 269     if ( style & wxFD_SAVE )
 270     {
 271         if ( !fname.empty() )
 272         {
 273             gtk_file_chooser_set_current_name(file_chooser, fname.fn_str());
 274         }
 275
 276 #if GTK_CHECK_VERSION(2,7,3)
 277         if ((style & wxFD_OVERWRITE_PROMPT) && !gtk_check_version(2,7,3))
 278             gtk_file_chooser_set_do_overwrite_confirmation(file_chooser, true);
 279 #endif
 280     }
 281     else // wxFD_OPEN
 282     {
 283         if ( !fname.empty() )
 284         {
 285             gtk_file_chooser_set_filename(file_chooser,
 286                                           fn.GetFullPath().fn_str());
 287         }
 288     }
 289
 290     if ( style & wxFD_PREVIEW )
 291     {
 292         GtkWidget *previewImage = gtk_image_new();
 293
 294         gtk_file_chooser_set_preview_widget(file_chooser, previewImage);
 295         g_signal_connect(m_widget, "update-preview",
 296                          G_CALLBACK(gtk_filedialog_update_preview_callback),
 297                          previewImage);
 298     }
 299 }
 300
 301 wxFileDialog::~wxFileDialog()
 302 {
 303     if (m_extraControl)
 304     {
 305         // get chooser to drop its reference right now, allowing wxWindow dtor
 306         // to verify that ref count drops to zero
 307         gtk_file_chooser_set_extra_widget(
 308             GTK_FILE_CHOOSER(m_widget), NULL);
 309     }
 310 }
 311
 312 void wxFileDialog::OnFakeOk(wxCommandEvent& WXUNUSED(event))
 313 {
 314     EndDialog(wxID_OK);
 315 }
 316
 317 int wxFileDialog::ShowModal()
 318 {
 319     CreateExtraControl();
 320
 321     return wxDialog::ShowModal();
 322 }
 323
 324 void wxFileDialog::DoSetSize(int WXUNUSED(x), int WXUNUSED(y),
 325                              int WXUNUSED(width), int WXUNUSED(height),
 326                              int WXUNUSED(sizeFlags))
 327 {
 328 }
 329
 330 void wxFileDialog::OnSize(wxSizeEvent&)
 331 {
 332     // avoid calling DoLayout(), which will set the (wrong) size of
 333     // m_extraControl, its size is managed by GtkFileChooser
 334 }
 335
 336 wxString wxFileDialog::GetPath() const
 337 {
 338     return m_fc.GetPath();
 339 }
 340
 341 void wxFileDialog::GetFilenames(wxArrayString& files) const
 342 {
 343     m_fc.GetFilenames( files );
 344 }
 345
 346 void wxFileDialog::GetPaths(wxArrayString& paths) const
 347 {
 348     m_fc.GetPaths( paths );
 349 }
 350
 351 void wxFileDialog::SetMessage(const wxString& message)
 352 {
 353     m_message = message;
 354     SetTitle(message);
 355 }
 356
 357 void wxFileDialog::SetPath(const wxString& path)
 358 {
 359     m_fc.SetPath( path );
 360 }
 361
 362 void wxFileDialog::SetDirectory(const wxString& dir)
 363 {
 364     m_fc.SetDirectory( dir );
 365 }
 366
 367 wxString wxFileDialog::GetDirectory() const
 368 {
 369     return m_fc.GetDirectory();
 370 }
 371
 372 void wxFileDialog::SetFilename(const wxString& name)
 373 {
 374     if (HasFdFlag(wxFD_SAVE))
 375         gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(m_widget), wxGTK_CONV(name));
 376     else
 377         SetPath(wxFileName(GetDirectory(), name).GetFullPath());
 378 }
 379
 380 wxString wxFileDialog::GetFilename() const
 381 {
 382     return m_fc.GetFilename();
 383 }
 384
 385 void wxFileDialog::SetWildcard(const wxString& wildCard)
 386 {
 387     m_fc.SetWildcard( wildCard );
 388 }
 389
 390 void wxFileDialog::SetFilterIndex(int filterIndex)
 391 {
 392
 393     m_fc.SetFilterIndex( filterIndex);
 394 }
 395
 396 int wxFileDialog::GetFilterIndex() const
 397 {
 398     return m_fc.GetFilterIndex();
 399 }
 400
 401 #endif // wxUSE_FILEDLG