Defer widget rebuild to just before they are rendered

[libs/gltk.git] / source / widget.cpp

diff --git a/source/widget.cpp b/source/widget.cpp
index d6d57554fc5f324f02f22f48a48c5dbe3386903c..1c73d7640cc610c49ccb33f6e7f4b0fe315a83d0 100644 (file)
--- a/source/widget.cpp
+++ b/source/widget.cpp
@@ -73,7 +73,7 @@ void Widget::set_geometry(const Geometry &g)
        if(size_changed)
        {
                on_size_change();
-               rebuild();
+               mark_rebuild();
        }
 }
 
@@ -141,7 +141,7 @@ void Widget::update_style()
 
        on_style_change();
        signal_autosize_changed.emit();
-       rebuild();
+       mark_rebuild();
 }
 
 void Widget::set_tooltip(const string &t)
@@ -184,7 +184,7 @@ void Widget::set_state(State mask, State bits)
        State old_state = state;
        state = (state&~mask)|bits;
        if(style && style->compare_states(old_state, state))
-               rebuild();
+               mark_rebuild();
 }
 
 void Widget::set_animation_interval(const Time::TimeDelta &iv)
@@ -201,6 +201,24 @@ void Widget::stop_animation()
        set_animation_interval(Time::zero);
 }
 
+void Widget::mark_rebuild()
+{
+       if(rebuild_needed)
+               return;
+
+       rebuild_needed = true;
+       signal_rebuild_needed.emit();
+}
+
+void Widget::rebuild_hierarchy()
+{
+       if(rebuild_needed)
+       {
+               rebuild_needed = false;
+               rebuild();
+       }
+}
+
 void Widget::rebuild()
 {
        if(!style)