Fix X11 embedding on Qt4

Author: DomClark

plugins/VstEffect/VstEffectControlDialog.cpp

@@ -64,7 +64,7 @@ VstEffectControlDialog::VstEffectControlDialog( VstEffectControls * _ctl ) :
 
 		if (embed_vst) {
 			if (! m_plugin->pluginWidget()) {
-				m_plugin->createUI(nullptr);
+				m_plugin->createUI(this);
 			}
 			m_pluginWidget = m_plugin->pluginWidget();
 		}

plugins/vestige/vestige.cpp

@@ -107,10 +107,12 @@ class VstInstrumentPlugin : public VstPlugin
 	void createUI( QWidget *parent ) override
 	{
 		Q_UNUSED(parent);
-		VstPlugin::createUI( nullptr );
 		if ( embedMethod() != "none" ) {
 			m_pluginSubWindow.reset(new vstSubWin( gui->mainWindow()->workspace() ));
+			VstPlugin::createUI( m_pluginSubWindow.get() );
 			m_pluginSubWindow->setWidget(pluginWidget());
+		} else {
+			VstPlugin::createUI( nullptr );
 		}
 	}
 

plugins/vst_base/VstPlugin.cpp

@@ -656,6 +656,10 @@ void VstPlugin::createUI( QWidget * parent )
 #ifdef LMMS_BUILD_LINUX
 	if (m_embedMethod == "xembed" )
 	{
+		if (parent)
+		{
+			parent->setAttribute(Qt::WA_NativeWindow);
+		}
 		QX11EmbedContainer * embedContainer = new QX11EmbedContainer( parent );
 		connect(embedContainer, SIGNAL(clientIsEmbedded()), this, SLOT(handleClientEmbed()));
 		embedContainer->embedClient( m_pluginWindowID );
@@ -671,8 +675,6 @@ void VstPlugin::createUI( QWidget * parent )
 	container->setWindowTitle( name() );
 
 	m_pluginWidget = container;
-
-	container->setFixedSize( m_pluginGeometry );
 }
 
 bool VstPlugin::eventFilter(QObject *obj, QEvent *event)