1 files changed, 48 insertions, 2 deletions

diff --git a/src/x11_in_qt4.cpp b/src/x11_in_qt4.cpp
index a39ba28..916b384 100644
--- a/src/x11_in_qt4.cpp
+++ b/src/x11_in_qt4.cpp
@@ -14,20 +14,62 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include <QTimerEvent>
 #include <QX11EmbedContainer>
 #undef signals
 
 #include "./suil_config.h"
 #include "./suil_internal.h"
 
+#ifndef HAVE_NEW_LV2
+typedef struct _LV2UI_Idle_Interface LV2UI_Idle_Interface;
+#endif
+
 extern "C" {
 
+class SuilQX11Container : public QX11EmbedContainer
+{
+public:
+	SuilQX11Container(SuilInstance*               instance,
+	                  const LV2UI_Idle_Interface* idle_iface)
+		: QX11EmbedContainer()
+		, _instance(instance)
+		, _idle_iface(idle_iface)
+		, _ui_timer(0)
+	{}
+
+#ifdef HAVE_NEW_LV2
+	void showEvent(QShowEvent* event) {
+		if (_idle_iface) {
+			_ui_timer = this->startTimer(30);
+		}
+		QX11EmbedContainer::showEvent(event);
+	}
+
+	void timerEvent(QTimerEvent* event) {
+		if (event->timerId() == _ui_timer && _idle_iface) {
+			_idle_iface->idle(_instance->handle);
+		}
+	}
+#endif
+
+	SuilInstance*               _instance;
+	const LV2UI_Idle_Interface* _idle_iface;
+	int                         _ui_timer;
+};
+
 static int
 wrapper_wrap(SuilWrapper*  wrapper,
              SuilInstance* instance)
 {
-	QX11EmbedWidget* const    ew   = (QX11EmbedWidget*)wrapper->impl;
-	QX11EmbedContainer* const wrap = new QX11EmbedContainer();
+	const LV2UI_Idle_Interface* idle_iface = NULL;
+#ifdef HAVE_NEW_LV2
+	idle_iface = (const LV2UI_Idle_Interface*)suil_instance_extension_data(
+		instance, LV2_UI__idleInterface);
+#endif
+
+	QX11EmbedWidget* const   ew   = (QX11EmbedWidget*)wrapper->impl;
+	SuilQX11Container* const wrap = new SuilQX11Container(instance, idle_iface);
 
 	ew->embedInto(wrap->winId());
 
@@ -68,6 +110,10 @@ suil_wrapper_new(SuilHost*      host,
 	suil_add_feature(features, &n_features, LV2_UI__resize,
 	                 &wrapper->resize);
 
+#ifdef HAVE_NEW_LV2
+	suil_add_feature(features, &n_features, LV2_UI__idleInterface, NULL);
+#endif
+
 	return wrapper;
 }