OSC: Catch new strips, gone strips and redo banks and observers. Add more select...

[ardour.git] / libs / gtkmm2ext / pixfader.cc

diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc
index 1e814fd147517b6aa6b0b2ae77f7a06e28cc0004..64ee449646e5f310d824258bccd61a29d6150933 100644 (file)
--- a/libs/gtkmm2ext/pixfader.cc
+++ b/libs/gtkmm2ext/pixfader.cc
@@ -85,6 +85,15 @@ PixFader::~PixFader ()
        if (_layout) _layout.clear (); // drop reference to existing layout
 }
 
+void
+PixFader::flush_pattern_cache () {
+       for (list<FaderImage*>::iterator f = _patterns.begin(); f != _patterns.end(); ++f) {
+               cairo_pattern_destroy ((*f)->pattern);
+       }
+       _patterns.clear();
+}
+
+
 cairo_pattern_t*
 PixFader::find_pattern (double afr, double afg, double afb,
                        double abr, double abg, double abb,
@@ -347,6 +356,9 @@ PixFader::on_size_request (GtkRequisition* req)
 void
 PixFader::on_size_allocate (Gtk::Allocation& alloc)
 {
+       int old_girth = _girth;
+       int old_span = _span;
+
        CairoWidget::on_size_allocate(alloc);
 
        if (_orien == VERT) {
@@ -357,7 +369,7 @@ PixFader::on_size_allocate (Gtk::Allocation& alloc)
                _span = alloc.get_width ();
        }
 
-       if (is_realized()) {
+       if (is_realized() && ((old_girth != _girth) || (old_span != _span))) {
                /* recreate patterns in case we've changed size */
                create_patterns ();
        }
@@ -700,7 +712,7 @@ PixFader::on_style_changed (const Glib::RefPtr<Gtk::Style>&)
                _text = "";
                set_text (txt, _centered_text, false);
        }
-       /* patterns are cached and re-created as needed 
+       /* patterns are cached and re-created as needed
         * during 'expose' in the GUI thread */
        _pattern = 0;
        queue_draw ();