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diff --git a/ui/qt/stock_icon.cpp b/ui/qt/stock_icon.cpp
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+/* stock_icon.cpp
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "stock_icon.h"
+
+// Stock icons. Based on gtk/stock_icons.h
+
+// Toolbar icon sizes:
+// OS X freestanding: 32x32, 32x32@2x, segmented (inside a button): <= 19x19
+// Windows: 16x16, 24x24, 32x32
+// GNOME: 24x24 (default), 48x48
+
+// References:
+//
+// http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
+// http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
+//
+// http://mithatkonar.com/wiki/doku.php/qt/icons
+//
+// https://developer.apple.com/library/mac/documentation/userexperience/conceptual/applehiguidelines/IconsImages/IconsImages.html#//apple_ref/doc/uid/20000967-TPXREF102
+// http://msdn.microsoft.com/en-us/library/windows/desktop/dn742485.aspx
+// https://developer.gnome.org/hig-book/stable/icons-types.html.en
+// http://msdn.microsoft.com/en-us/library/ms246582.aspx
+
+// To do:
+// - 32x32, 48x48, 64x64, and unscaled (.svg) icons
+// - Indent find & go actions when those panes are open.
+// - Replace or remove:
+//   WIRESHARK_STOCK_CAPTURE_FILTER x-capture-filter
+//   WIRESHARK_STOCK_DISPLAY_FILTER x-display-filter
+//   GTK_STOCK_SELECT_COLOR x-coloring-rules
+//   GTK_STOCK_PREFERENCES preferences-system
+//   GTK_STOCK_HELP help-contents
+
+#include "wireshark_application.h"
+
+#include <QFile>
+#include <QStyle>
+
+QString path_pfx_ = ":/icons/toolbar/";
+
+StockIcon::StockIcon(const char *icon_name) :
+    QIcon()
+{
+    if (strcmp(icon_name, "document-open") == 0) {
+        QIcon dir_icon = fromTheme(icon_name, wsApp->style()->standardIcon(QStyle::SP_DirIcon));
+        swap(dir_icon);
+        return;
+    }
+
+    if (hasThemeIcon(icon_name)) {
+        QIcon theme_icon = fromTheme(icon_name);
+        swap(theme_icon);
+        return;
+    } else {
+        QStringList types = QStringList() << "16x16" << "24x24";
+        foreach (QString type, types) {
+            QString icon_path = path_pfx_ + QString("%1/%2.png").arg(type).arg(icon_name);
+            if (QFile::exists(icon_path)) {
+                addFile(icon_path);
+            }
+        }
+    }
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */