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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include <gtk/gtk.h> | |
6 #include <map> | |
7 #include <set> | |
8 #include <vector> | |
9 | |
10 #include "base/file_util.h" | |
11 #include "base/logging.h" | |
12 #include "base/message_loop.h" | |
13 #include "base/string_util.h" | |
14 #include "base/sys_string_conversions.h" | |
15 #include "base/threading/thread.h" | |
16 #include "base/threading/thread_restrictions.h" | |
17 #include "base/utf_string_conversions.h" | |
18 //#include "chrome/browser/ui/gtk/select_file_dialog_impl.h" | |
19 #include "chrome/browser/ui/select_file_dialog.h" | |
20 #include "grit/generated_resources.h" | |
21 //#include "ui/base/gtk/gtk_signal.h" | |
22 #include "ui/base/l10n/l10n_util.h" | |
23 | |
24 // Implementation of SelectFileDialog that shows a Gtk common dialog for | |
25 // choosing a file or folder. This acts as a modal dialog. | |
26 class SelectFileDialogImplGTK : public SelectFileDialogImpl { | |
27 public: | |
28 explicit SelectFileDialogImplGTK(Listener* listener, | |
29 ui::SelectFilePolicy* policy); | |
30 | |
31 protected: | |
32 virtual ~SelectFileDialogImplGTK(); | |
33 | |
34 // SelectFileDialog implementation. | |
35 // |params| is user data we pass back via the Listener interface. | |
36 virtual void SelectFileImpl(Type type, | |
37 const string16& title, | |
38 const FilePath& default_path, | |
39 const FileTypeInfo* file_types, | |
40 int file_type_index, | |
41 const FilePath::StringType& default_extension, | |
42 gfx::NativeWindow owning_window, | |
43 void* params) OVERRIDE; | |
44 | |
45 private: | |
46 virtual bool HasMultipleFileTypeChoicesImpl() OVERRIDE; | |
47 | |
48 // Add the filters from |file_types_| to |chooser|. | |
49 void AddFilters(GtkFileChooser* chooser); | |
50 | |
51 // Notifies the listener that a single file was chosen. | |
52 void FileSelected(GtkWidget* dialog, const FilePath& path); | |
53 | |
54 // Notifies the listener that multiple files were chosen. | |
55 void MultiFilesSelected(GtkWidget* dialog, | |
56 const std::vector<FilePath>& files); | |
57 | |
58 // Notifies the listener that no file was chosen (the action was canceled). | |
59 // Dialog is passed so we can find that |params| pointer that was passed to | |
60 // us when we were told to show the dialog. | |
61 void FileNotSelected(GtkWidget* dialog); | |
62 | |
63 GtkWidget* CreateSelectFolderDialog(const std::string& title, | |
64 const FilePath& default_path, gfx::NativeWindow parent); | |
65 | |
66 GtkWidget* CreateFileOpenDialog(const std::string& title, | |
67 const FilePath& default_path, gfx::NativeWindow parent); | |
68 | |
69 GtkWidget* CreateMultiFileOpenDialog(const std::string& title, | |
70 const FilePath& default_path, gfx::NativeWindow parent); | |
71 | |
72 GtkWidget* CreateSaveAsDialog(const std::string& title, | |
73 const FilePath& default_path, gfx::NativeWindow parent); | |
74 | |
75 // Removes and returns the |params| associated with |dialog| from | |
76 // |params_map_|. | |
77 void* PopParamsForDialog(GtkWidget* dialog); | |
78 | |
79 // Take care of internal data structures when a file dialog is destroyed. | |
80 void FileDialogDestroyed(GtkWidget* dialog); | |
81 | |
82 // Check whether response_id corresponds to the user cancelling/closing the | |
83 // dialog. Used as a helper for the below callbacks. | |
84 bool IsCancelResponse(gint response_id); | |
85 | |
86 // Common function for OnSelectSingleFileDialogResponse and | |
87 // OnSelectSingleFolderDialogResponse. | |
88 void SelectSingleFileHelper(GtkWidget* dialog, | |
89 gint response_id, | |
90 bool allow_folder); | |
91 | |
92 // Common function for CreateFileOpenDialog and CreateMultiFileOpenDialog. | |
93 GtkWidget* CreateFileOpenHelper(const std::string& title, | |
94 const FilePath& default_path, | |
95 gfx::NativeWindow parent); | |
96 | |
97 // Callback for when the user responds to a Save As or Open File dialog. | |
98 CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void, | |
99 OnSelectSingleFileDialogResponse, int); | |
100 | |
101 // Callback for when the user responds to a Select Folder dialog. | |
102 CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void, | |
103 OnSelectSingleFolderDialogResponse, int); | |
104 | |
105 // Callback for when the user responds to a Open Multiple Files dialog. | |
106 CHROMEGTK_CALLBACK_1(SelectFileDialogImplGTK, void, | |
107 OnSelectMultiFileDialogResponse, int); | |
108 | |
109 // Callback for when the file chooser gets destroyed. | |
110 CHROMEGTK_CALLBACK_0(SelectFileDialogImplGTK, void, OnFileChooserDestroy); | |
111 | |
112 // Callback for when we update the preview for the selection. | |
113 CHROMEGTK_CALLBACK_0(SelectFileDialogImplGTK, void, OnUpdatePreview); | |
114 | |
115 // A map from dialog windows to the |params| user data associated with them. | |
116 std::map<GtkWidget*, void*> params_map_; | |
117 | |
118 // The GtkImage widget for showing previews of selected images. | |
119 GtkWidget* preview_; | |
120 | |
121 // All our dialogs. | |
122 std::set<GtkWidget*> dialogs_; | |
123 | |
124 DISALLOW_COPY_AND_ASSIGN(SelectFileDialogImplGTK); | |
125 }; | |
126 | |
127 // The size of the preview we display for selected image files. We set height | |
128 // larger than width because generally there is more free space vertically | |
129 // than horiztonally (setting the preview image will alway expand the width of | |
130 // the dialog, but usually not the height). The image's aspect ratio will always | |
131 // be preserved. | |
132 static const int kPreviewWidth = 256; | |
133 static const int kPreviewHeight = 512; | |
134 | |
135 SelectFileDialogImpl* SelectFileDialogImpl::NewSelectFileDialogImplGTK( | |
136 Listener* listener, ui::SelectFilePolicy* policy) { | |
137 return new SelectFileDialogImplGTK(listener, policy); | |
138 } | |
139 | |
140 SelectFileDialogImplGTK::SelectFileDialogImplGTK(Listener* listener, | |
141 ui::SelectFilePolicy* policy) | |
142 : SelectFileDialogImpl(listener, policy), | |
143 preview_(NULL) { | |
144 } | |
145 | |
146 SelectFileDialogImplGTK::~SelectFileDialogImplGTK() { | |
147 while (dialogs_.begin() != dialogs_.end()) { | |
148 gtk_widget_destroy(*(dialogs_.begin())); | |
149 } | |
150 } | |
151 | |
152 bool SelectFileDialogImplGTK::HasMultipleFileTypeChoicesImpl() { | |
153 return file_types_.extensions.size() > 1; | |
154 } | |
155 | |
156 // We ignore |default_extension|. | |
157 void SelectFileDialogImplGTK::SelectFileImpl( | |
158 Type type, | |
159 const string16& title, | |
160 const FilePath& default_path, | |
161 const FileTypeInfo* file_types, | |
162 int file_type_index, | |
163 const FilePath::StringType& default_extension, | |
164 gfx::NativeWindow owning_window, | |
165 void* params) { | |
166 type_ = type; | |
167 // |owning_window| can be null when user right-clicks on a downloadable item | |
168 // and chooses 'Open Link in New Tab' when 'Ask where to save each file | |
169 // before downloading.' preference is turned on. (http://crbug.com/29213) | |
170 if (owning_window) | |
171 parents_.insert(owning_window); | |
172 | |
173 std::string title_string = UTF16ToUTF8(title); | |
174 | |
175 file_type_index_ = file_type_index; | |
176 if (file_types) | |
177 file_types_ = *file_types; | |
178 else | |
179 file_types_.include_all_files = true; | |
180 | |
181 GtkWidget* dialog = NULL; | |
182 switch (type) { | |
183 case SELECT_FOLDER: | |
184 dialog = CreateSelectFolderDialog(title_string, default_path, | |
185 owning_window); | |
186 break; | |
187 case SELECT_OPEN_FILE: | |
188 dialog = CreateFileOpenDialog(title_string, default_path, owning_window); | |
189 break; | |
190 case SELECT_OPEN_MULTI_FILE: | |
191 dialog = CreateMultiFileOpenDialog(title_string, default_path, | |
192 owning_window); | |
193 break; | |
194 case SELECT_SAVEAS_FILE: | |
195 dialog = CreateSaveAsDialog(title_string, default_path, owning_window); | |
196 break; | |
197 default: | |
198 NOTREACHED(); | |
199 return; | |
200 } | |
201 g_signal_connect(dialog, "delete-event", | |
202 G_CALLBACK(gtk_widget_hide_on_delete), NULL); | |
203 dialogs_.insert(dialog); | |
204 | |
205 preview_ = gtk_image_new(); | |
206 g_signal_connect(dialog, "destroy", | |
207 G_CALLBACK(OnFileChooserDestroyThunk), this); | |
208 g_signal_connect(dialog, "update-preview", | |
209 G_CALLBACK(OnUpdatePreviewThunk), this); | |
210 gtk_file_chooser_set_preview_widget(GTK_FILE_CHOOSER(dialog), preview_); | |
211 | |
212 params_map_[dialog] = params; | |
213 | |
214 // Set window-to-parent modality by adding the dialog to the same window | |
215 // group as the parent. | |
216 gtk_window_group_add_window(gtk_window_get_group(owning_window), | |
217 GTK_WINDOW(dialog)); | |
218 gtk_window_set_modal(GTK_WINDOW(dialog), TRUE); | |
219 | |
220 gtk_widget_show_all(dialog); | |
221 } | |
222 | |
223 void SelectFileDialogImplGTK::AddFilters(GtkFileChooser* chooser) { | |
224 for (size_t i = 0; i < file_types_.extensions.size(); ++i) { | |
225 GtkFileFilter* filter = NULL; | |
226 std::set<std::string> fallback_labels; | |
227 | |
228 for (size_t j = 0; j < file_types_.extensions[i].size(); ++j) { | |
229 const std::string& current_extension = file_types_.extensions[i][j]; | |
230 if (!current_extension.empty()) { | |
231 if (!filter) | |
232 filter = gtk_file_filter_new(); | |
233 std::string pattern = "*." + current_extension; | |
234 gtk_file_filter_add_pattern(filter, pattern.c_str()); | |
235 fallback_labels.insert(pattern); | |
236 } | |
237 } | |
238 // We didn't find any non-empty extensions to filter on. | |
239 if (!filter) | |
240 continue; | |
241 | |
242 // The description vector may be blank, in which case we are supposed to | |
243 // use some sort of default description based on the filter. | |
244 if (i < file_types_.extension_description_overrides.size()) { | |
245 gtk_file_filter_set_name(filter, UTF16ToUTF8( | |
246 file_types_.extension_description_overrides[i]).c_str()); | |
247 } else { | |
248 // There is no system default filter description so we use | |
249 // the extensions themselves if the description is blank. | |
250 std::vector<std::string> fallback_labels_vector(fallback_labels.begin(), | |
251 fallback_labels.end()); | |
252 std::string fallback_label = JoinString(fallback_labels_vector, ','); | |
253 gtk_file_filter_set_name(filter, fallback_label.c_str()); | |
254 } | |
255 | |
256 gtk_file_chooser_add_filter(chooser, filter); | |
257 if (i == file_type_index_ - 1) | |
258 gtk_file_chooser_set_filter(chooser, filter); | |
259 } | |
260 | |
261 // Add the *.* filter, but only if we have added other filters (otherwise it | |
262 // is implied). | |
263 if (file_types_.include_all_files && !file_types_.extensions.empty()) { | |
264 GtkFileFilter* filter = gtk_file_filter_new(); | |
265 gtk_file_filter_add_pattern(filter, "*"); | |
266 gtk_file_filter_set_name(filter, | |
267 l10n_util::GetStringUTF8(IDS_SAVEAS_ALL_FILES).c_str()); | |
268 gtk_file_chooser_add_filter(chooser, filter); | |
269 } | |
270 } | |
271 | |
272 void SelectFileDialogImplGTK::FileSelected(GtkWidget* dialog, | |
273 const FilePath& path) { | |
274 if (type_ == SELECT_SAVEAS_FILE) | |
275 *last_saved_path_ = path.DirName(); | |
276 else if (type_ == SELECT_OPEN_FILE || type_ == SELECT_FOLDER) | |
277 *last_opened_path_ = path.DirName(); | |
278 else | |
279 NOTREACHED(); | |
280 | |
281 if (listener_) { | |
282 GtkFileFilter* selected_filter = | |
283 gtk_file_chooser_get_filter(GTK_FILE_CHOOSER(dialog)); | |
284 GSList* filters = gtk_file_chooser_list_filters(GTK_FILE_CHOOSER(dialog)); | |
285 int idx = g_slist_index(filters, selected_filter); | |
286 g_slist_free(filters); | |
287 listener_->FileSelected(path, idx + 1, PopParamsForDialog(dialog)); | |
288 } | |
289 gtk_widget_destroy(dialog); | |
290 } | |
291 | |
292 void SelectFileDialogImplGTK::MultiFilesSelected(GtkWidget* dialog, | |
293 const std::vector<FilePath>& files) { | |
294 *last_opened_path_ = files[0].DirName(); | |
295 | |
296 if (listener_) | |
297 listener_->MultiFilesSelected(files, PopParamsForDialog(dialog)); | |
298 gtk_widget_destroy(dialog); | |
299 } | |
300 | |
301 void SelectFileDialogImplGTK::FileNotSelected(GtkWidget* dialog) { | |
302 void* params = PopParamsForDialog(dialog); | |
303 if (listener_) | |
304 listener_->FileSelectionCanceled(params); | |
305 gtk_widget_destroy(dialog); | |
306 } | |
307 | |
308 GtkWidget* SelectFileDialogImplGTK::CreateFileOpenHelper( | |
309 const std::string& title, | |
310 const FilePath& default_path, | |
311 gfx::NativeWindow parent) { | |
312 GtkWidget* dialog = | |
313 gtk_file_chooser_dialog_new(title.c_str(), parent, | |
314 GTK_FILE_CHOOSER_ACTION_OPEN, | |
315 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, | |
316 GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, | |
317 NULL); | |
318 AddFilters(GTK_FILE_CHOOSER(dialog)); | |
319 | |
320 if (!default_path.empty()) { | |
321 if (CallDirectoryExistsOnUIThread(default_path)) { | |
322 gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), | |
323 default_path.value().c_str()); | |
324 } else { | |
325 // If the file doesn't exist, this will just switch to the correct | |
326 // directory. That's good enough. | |
327 gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(dialog), | |
328 default_path.value().c_str()); | |
329 } | |
330 } else if (!last_opened_path_->empty()) { | |
331 gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), | |
332 last_opened_path_->value().c_str()); | |
333 } | |
334 return dialog; | |
335 } | |
336 | |
337 GtkWidget* SelectFileDialogImplGTK::CreateSelectFolderDialog( | |
338 const std::string& title, | |
339 const FilePath& default_path, | |
340 gfx::NativeWindow parent) { | |
341 std::string title_string = !title.empty() ? title : | |
342 l10n_util::GetStringUTF8(IDS_SELECT_FOLDER_DIALOG_TITLE); | |
343 | |
344 GtkWidget* dialog = | |
345 gtk_file_chooser_dialog_new(title_string.c_str(), parent, | |
346 GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER, | |
347 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, | |
348 GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, | |
349 NULL); | |
350 | |
351 if (!default_path.empty()) { | |
352 gtk_file_chooser_set_filename(GTK_FILE_CHOOSER(dialog), | |
353 default_path.value().c_str()); | |
354 } else if (!last_opened_path_->empty()) { | |
355 gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), | |
356 last_opened_path_->value().c_str()); | |
357 } | |
358 gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dialog), FALSE); | |
359 g_signal_connect(dialog, "response", | |
360 G_CALLBACK(OnSelectSingleFolderDialogResponseThunk), this); | |
361 return dialog; | |
362 } | |
363 | |
364 GtkWidget* SelectFileDialogImplGTK::CreateFileOpenDialog( | |
365 const std::string& title, | |
366 const FilePath& default_path, | |
367 gfx::NativeWindow parent) { | |
368 std::string title_string = !title.empty() ? title : | |
369 l10n_util::GetStringUTF8(IDS_OPEN_FILE_DIALOG_TITLE); | |
370 | |
371 GtkWidget* dialog = CreateFileOpenHelper(title_string, default_path, parent); | |
372 gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dialog), FALSE); | |
373 g_signal_connect(dialog, "response", | |
374 G_CALLBACK(OnSelectSingleFileDialogResponseThunk), this); | |
375 return dialog; | |
376 } | |
377 | |
378 GtkWidget* SelectFileDialogImplGTK::CreateMultiFileOpenDialog( | |
379 const std::string& title, | |
380 const FilePath& default_path, | |
381 gfx::NativeWindow parent) { | |
382 std::string title_string = !title.empty() ? title : | |
383 l10n_util::GetStringUTF8(IDS_OPEN_FILES_DIALOG_TITLE); | |
384 | |
385 GtkWidget* dialog = CreateFileOpenHelper(title_string, default_path, parent); | |
386 gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dialog), TRUE); | |
387 g_signal_connect(dialog, "response", | |
388 G_CALLBACK(OnSelectMultiFileDialogResponseThunk), this); | |
389 return dialog; | |
390 } | |
391 | |
392 GtkWidget* SelectFileDialogImplGTK::CreateSaveAsDialog(const std::string& title, | |
393 const FilePath& default_path, gfx::NativeWindow parent) { | |
394 std::string title_string = !title.empty() ? title : | |
395 l10n_util::GetStringUTF8(IDS_SAVE_AS_DIALOG_TITLE); | |
396 | |
397 GtkWidget* dialog = | |
398 gtk_file_chooser_dialog_new(title_string.c_str(), parent, | |
399 GTK_FILE_CHOOSER_ACTION_SAVE, | |
400 GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL, | |
401 GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, | |
402 NULL); | |
403 | |
404 AddFilters(GTK_FILE_CHOOSER(dialog)); | |
405 if (!default_path.empty()) { | |
406 // Since the file may not already exist, we use | |
407 // set_current_folder() followed by set_current_name(), as per the | |
408 // recommendation of the GTK docs. | |
409 gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), | |
410 default_path.DirName().value().c_str()); | |
411 gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER(dialog), | |
412 default_path.BaseName().value().c_str()); | |
413 } else if (!last_saved_path_->empty()) { | |
414 gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), | |
415 last_saved_path_->value().c_str()); | |
416 } | |
417 gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dialog), FALSE); | |
418 gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), | |
419 TRUE); | |
420 g_signal_connect(dialog, "response", | |
421 G_CALLBACK(OnSelectSingleFileDialogResponseThunk), this); | |
422 return dialog; | |
423 } | |
424 | |
425 void* SelectFileDialogImplGTK::PopParamsForDialog(GtkWidget* dialog) { | |
426 std::map<GtkWidget*, void*>::iterator iter = params_map_.find(dialog); | |
427 DCHECK(iter != params_map_.end()); | |
428 void* params = iter->second; | |
429 params_map_.erase(iter); | |
430 return params; | |
431 } | |
432 | |
433 void SelectFileDialogImplGTK::FileDialogDestroyed(GtkWidget* dialog) { | |
434 dialogs_.erase(dialog); | |
435 | |
436 // Parent may be NULL in a few cases: 1) on shutdown when | |
437 // AllBrowsersClosed() trigger this handler after all the browser | |
438 // windows got destroyed, or 2) when the parent tab has been opened by | |
439 // 'Open Link in New Tab' context menu on a downloadable item and | |
440 // the tab has no content (see the comment in SelectFile as well). | |
441 GtkWindow* parent = gtk_window_get_transient_for(GTK_WINDOW(dialog)); | |
442 if (!parent) | |
443 return; | |
444 std::set<GtkWindow*>::iterator iter = parents_.find(parent); | |
445 if (iter != parents_.end()) | |
446 parents_.erase(iter); | |
447 else | |
448 NOTREACHED(); | |
449 } | |
450 | |
451 bool SelectFileDialogImplGTK::IsCancelResponse(gint response_id) { | |
452 bool is_cancel = response_id == GTK_RESPONSE_CANCEL || | |
453 response_id == GTK_RESPONSE_DELETE_EVENT; | |
454 if (is_cancel) | |
455 return true; | |
456 | |
457 DCHECK(response_id == GTK_RESPONSE_ACCEPT); | |
458 return false; | |
459 } | |
460 | |
461 void SelectFileDialogImplGTK::SelectSingleFileHelper(GtkWidget* dialog, | |
462 gint response_id, | |
463 bool allow_folder) { | |
464 if (IsCancelResponse(response_id)) { | |
465 FileNotSelected(dialog); | |
466 return; | |
467 } | |
468 | |
469 gchar* filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog)); | |
470 if (!filename) { | |
471 FileNotSelected(dialog); | |
472 return; | |
473 } | |
474 | |
475 FilePath path(filename); | |
476 g_free(filename); | |
477 | |
478 if (allow_folder) { | |
479 FileSelected(dialog, path); | |
480 return; | |
481 } | |
482 | |
483 if (CallDirectoryExistsOnUIThread(path)) | |
484 FileNotSelected(dialog); | |
485 else | |
486 FileSelected(dialog, path); | |
487 } | |
488 | |
489 void SelectFileDialogImplGTK::OnSelectSingleFileDialogResponse( | |
490 GtkWidget* dialog, int response_id) { | |
491 SelectSingleFileHelper(dialog, response_id, false); | |
492 } | |
493 | |
494 void SelectFileDialogImplGTK::OnSelectSingleFolderDialogResponse( | |
495 GtkWidget* dialog, int response_id) { | |
496 SelectSingleFileHelper(dialog, response_id, true); | |
497 } | |
498 | |
499 void SelectFileDialogImplGTK::OnSelectMultiFileDialogResponse(GtkWidget* dialog, | |
500 int response_id) { | |
501 if (IsCancelResponse(response_id)) { | |
502 FileNotSelected(dialog); | |
503 return; | |
504 } | |
505 | |
506 GSList* filenames = gtk_file_chooser_get_filenames(GTK_FILE_CHOOSER(dialog)); | |
507 if (!filenames) { | |
508 FileNotSelected(dialog); | |
509 return; | |
510 } | |
511 | |
512 std::vector<FilePath> filenames_fp; | |
513 for (GSList* iter = filenames; iter != NULL; iter = g_slist_next(iter)) { | |
514 FilePath path(static_cast<char*>(iter->data)); | |
515 g_free(iter->data); | |
516 if (CallDirectoryExistsOnUIThread(path)) | |
517 continue; | |
518 filenames_fp.push_back(path); | |
519 } | |
520 g_slist_free(filenames); | |
521 | |
522 if (filenames_fp.empty()) { | |
523 FileNotSelected(dialog); | |
524 return; | |
525 } | |
526 MultiFilesSelected(dialog, filenames_fp); | |
527 } | |
528 | |
529 void SelectFileDialogImplGTK::OnFileChooserDestroy(GtkWidget* dialog) { | |
530 FileDialogDestroyed(dialog); | |
531 } | |
532 | |
533 void SelectFileDialogImplGTK::OnUpdatePreview(GtkWidget* chooser) { | |
534 gchar* filename = gtk_file_chooser_get_preview_filename( | |
535 GTK_FILE_CHOOSER(chooser)); | |
536 if (!filename) | |
537 return; | |
538 // This will preserve the image's aspect ratio. | |
539 GdkPixbuf* pixbuf = gdk_pixbuf_new_from_file_at_size(filename, kPreviewWidth, | |
540 kPreviewHeight, NULL); | |
541 g_free(filename); | |
542 if (pixbuf) { | |
543 gtk_image_set_from_pixbuf(GTK_IMAGE(preview_), pixbuf); | |
544 g_object_unref(pixbuf); | |
545 } | |
546 gtk_file_chooser_set_preview_widget_active(GTK_FILE_CHOOSER(chooser), | |
547 pixbuf ? TRUE : FALSE); | |
548 } | |
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