gsl-shell.git - gsl-shell

diff --git a/agg-plot/plot.h b/agg-plot/plot.h
index 0ab76a89..06d0d35a 100644
--- a/agg-plot/plot.h
+++ b/agg-plot/plot.h

@@ -466,6 +466,11 @@ protected:

bool m_need_redraw;

opt_rect<double> m_rect;

+ // keep trace of the region where changes happened since

+ // the last pushlayer or clear

+ opt_rect<double> m_changes_accu;

+ opt_rect<double> m_changes_pending;

+

bool m_use_units;

units m_ux, m_uy;

@@ -505,6 +510,7 @@ void plot<RM>::commit_pending_draw()

{

push_drawing_queue();

m_need_redraw = false;

+ m_changes_pending.clear();

}

template <class RM>

@@ -642,6 +648,13 @@ template <class Canvas> void plot<RM>::draw_queue(Canvas& _canvas, const agg::tr

bb.add<rect_union>(ebb);

}

+ m_changes_accu.add<rect_union>(bb);

+

+ if (m_changes_pending.is_defined())

+ {

+ bb.add<rect_union>(m_changes_pending);

+ }

+

canvas.reset_clipping();

}

@@ -1114,6 +1127,8 @@ void plot<RM>::clear_current_layer()

clear_drawing_queue();

layer_dispose_elements(current);

current->clear();

+ m_changes_pending = m_changes_accu;

+ m_changes_accu.clear();

}

template <class RM>