diff options
Diffstat (limited to 'src/Fl_x.cxx')
| -rw-r--r-- | src/Fl_x.cxx | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx index e1831b5c4..22acff7e9 100644 --- a/src/Fl_x.cxx +++ b/src/Fl_x.cxx @@ -34,6 +34,7 @@ # include <FL/Fl_Tooltip.H> # include <FL/fl_draw.H> # include <FL/Fl_Paged_Device.H> +# include <FL/fl_ask.H> # include <stdio.h> # include <stdlib.h> # include "flstring.h" @@ -2339,6 +2340,10 @@ GC fl_gc; // make X drawing go into this window (called by subclass flush() impl.) void Fl_Window::make_current() { static GC gc; // the GC used by all X windows + if (!shown()) { + fl_alert("Fl_Window::make_current(), but window is not shown()."); + Fl::fatal("Fl_Window::make_current(), but window is not shown()."); + } if (!gc) gc = XCreateGC(fl_display, i->xid, 0, 0); fl_window = i->xid; fl_gc = gc; |