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diff --git a/fox-gui/window_surface.cpp b/fox-gui/window_surface.cpp
index 9d4d71e8..9196f7f1 100644
--- a/fox-gui/window_surface.cpp
+++ b/fox-gui/window_surface.cpp

@@ -178,6 +178,15 @@ window_surface::slot_update(unsigned index)

}

void

+window_surface::draw_all()

+{

+ for (unsigned k = 0; k < m_plots.size(); k++)

+ render(k);

+ const agg::rect_i r(0, 0, get_width(), get_height());

+ m_window->update_region(r);

+}

+

+void

window_surface::save_slot_image(unsigned index)

{

save_plot_image(index);