Merge pull request #314 from adobe/irichter/showSaveDialogLinux

- added implementation for ShowSaveDialog on Linux

appshell/appshell_extensions_gtk.cpp

@@ -187,7 +187,33 @@ int32 ShowSaveDialog(ExtensionString title,
                      ExtensionString proposedNewFilename,
                      ExtensionString& newFilePath)
 {
-    // TODO
+    GtkWidget *openSaveDialog;
+
+    openSaveDialog = gtk_file_chooser_dialog_new(title.c_str(),
+        NULL,
+        GTK_FILE_CHOOSER_ACTION_SAVE,
+        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+        GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
+        NULL);
+
+    gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (openSaveDialog), TRUE);	
+    if (!initialDirectory.empty())
+    {
+        gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (openSaveDialog), proposedNewFilename.c_str());
+
+        ExtensionString folderURI = std::string("file:///") + initialDirectory;
+        gtk_file_chooser_set_current_folder_uri (GTK_FILE_CHOOSER (openSaveDialog), folderURI.c_str());
+    }
+
+    if (gtk_dialog_run (GTK_DIALOG (openSaveDialog)) == GTK_RESPONSE_ACCEPT)
+    {
+        char* filePath;
+        filePath = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (openSaveDialog));
+        newFilePath = filePath;
+        g_free (filePath);
+    }
+
+    gtk_widget_destroy (openSaveDialog);
     return NO_ERROR;
 }