X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=libs%2Fgtkmm2ext%2Fpixfader.cc;h=64ee449646e5f310d824258bccd61a29d6150933;hb=dcf852aae41a2d407f770324f30a5b5138a51039;hp=1e814fd147517b6aa6b0b2ae77f7a06e28cc0004;hpb=57ce447fd19bd794afe90748d466bbe172c2eab0;p=ardour.git

diff --git a/libs/gtkmm2ext/pixfader.cc b/libs/gtkmm2ext/pixfader.cc
index 1e814fd147..64ee449646 100644
--- 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 ();