ForceQuitDialog: use the same window class of the real parent window

(bzr r3740.4.11)

1 files changed, 8 insertions, 1 deletions

diff --git a/decorations/DecorationsForceQuitDialog.cpp b/decorations/DecorationsForceQuitDialog.cpp
index 968981611..d7b93d79c 100644
--- a/decorations/DecorationsForceQuitDialog.cpp
+++ b/decorations/DecorationsForceQuitDialog.cpp
@@ -98,6 +98,8 @@ static void close_button_class_init(CloseButtonClass*);
 // Dialog implementation
 GtkWidget* sheet_style_dialog_new(Window parent_xid)
 {
+ auto* dpy = gdk_x11_get_default_xdisplay();
+
 auto* self = GTK_WINDOW(g_object_new(sheet_style_dialog_get_type(), nullptr));
 gtk_window_set_skip_taskbar_hint(self, TRUE);
 gtk_window_set_skip_pager_hint(self, TRUE);
@@ -107,6 +109,12 @@ GtkWidget* sheet_style_dialog_new(Window parent_xid)
 gtk_window_set_resizable(self, FALSE);
 gtk_window_set_title(self, "Force Quit Dialog");
 
+ XClassHint parent_class = {nullptr, nullptr};
+ XGetClassHint(dpy, parent_xid, &parent_class);
+ gtk_window_set_wmclass(self, parent_class.res_name, parent_class.res_class);
+ XFree(parent_class.res_class);
+ XFree(parent_class.res_name);
+
 auto const& deco_style = decoration::Style::Get();
 auto const& offset = deco_style->ShadowOffset();
 int max_offset = std::max(std::abs(offset.x), std::abs(offset.y));
@@ -127,7 +135,6 @@ GtkWidget* sheet_style_dialog_new(Window parent_xid)
 gtk_widget_realize(GTK_WIDGET(self));
 
 gdk_error_trap_push();
- auto* dpy = gdk_x11_get_default_xdisplay();
 auto xid = gdk_x11_window_get_xid(gwindow);
 XSetTransientForHint(dpy, xid, parent_xid);
 XSync(dpy, False);