diff --git a/kx_utils/kx_pult.cpp b/kx_utils/kx_pult.cpp
index 9e77a09..246b10e 100644
--- a/kx_utils/kx_pult.cpp
+++ b/kx_utils/kx_pult.cpp
@@ -218,13 +218,13 @@ void KX_Pult::setControlsEnable(bool enable) {
 
 void KX_Pult::setX(const KX_X_Data & data) {
 	if (!show_x) return;
-	ui->graphic->lock();
+	//ui->graphic->lock();
 	for (int i = 0; i < KX_X_PACKET_NUM; ++i) {
 		if (!isNormalDouble(data.x_data[i])) continue;
 		ui->graphic->addPoint(data.x_data[i], i, false);
 		values[i]->setText(QString("(%1): %2").arg(data.x_num[i]).arg(data.x_data[i]));
 	}
-	ui->graphic->unlock();
+	//ui->graphic->unlock();
 	if (!isPause) {
 		need_update = true;
 	}
diff --git a/make_libs.bat b/make_libs.bat
index a4047c8..3880234 100644
--- a/make_libs.bat
+++ b/make_libs.bat
@@ -3,4 +3,4 @@ set ARCH=%~1
 set PATH=%SDK_MINGW_DIR%%ARCH%\bin;%SDK_QT4_DIR%%ARCH%\bin;%SDK_CMAKE_DIR%\bin
 if defined SDK_QT5_DIR set Qt5_DIR=%SDK_QT5_DIR%%ARCH%
 mkdir ..\libs_build_win%ARCH%
-cd ../libs_build_win%ARCH% && cmake_mgw -Wno-dev ../libs && make install -j8 && cd ../libs && pause
+cd ../libs_build_win%ARCH% && cmake_mgw -Wno-dev -DQGLVIEW=1 ../libs && make install -j8 && cd ../libs && pause
diff --git a/qad/application/ribbon.cpp b/qad/application/ribbon.cpp
index 05990d7..863b4dc 100644
--- a/qad/application/ribbon.cpp
+++ b/qad/application/ribbon.cpp
@@ -1,4 +1,5 @@
 #include "ribbon.h"
+#include "qad_types.h"
 #include <QScrollBar>
 
 
@@ -13,6 +14,8 @@ Ribbon::Ribbon(QMainWindow * parent_): QToolBar() {
 	if (parent_)
 		parent_->installEventFilter(this);
 	init();
+	setTabIconSize(preferredIconSize(2));
+	setIconSize(preferredIconSize(3));
 }
 
 
diff --git a/qad/blockview/blockbusitem.cpp b/qad/blockview/blockbusitem.cpp
index 0091bb1..29f149e 100644
--- a/qad/blockview/blockbusitem.cpp
+++ b/qad/blockview/blockbusitem.cpp
@@ -730,6 +730,6 @@ void BlockBusItem::paint(QPainter * p, const QStyleOptionGraphicsItem * o, QWidg
 
 QRectF BlockBusItem::boundingRect() const {
 	QPolygonF p(pol);
-	p << new_end;
+	if (new_segment) p << new_end;
 	return enlargedRect(p.boundingRect(), 0, 0, 10.f);
 }
diff --git a/qad/blockview/blockview.cpp b/qad/blockview/blockview.cpp
index 22e6a6f..5c03477 100644
--- a/qad/blockview/blockview.cpp
+++ b/qad/blockview/blockview.cpp
@@ -1000,6 +1000,25 @@ void BlockView::fitInView(const QGraphicsItem * item, Qt::AspectRatioMode aspect
 }
 
 
+QRectF BlockView::itemsBoundingRect() const {
+	QList<QGraphicsItem*> gi = scene_->items();
+	if (gi.isEmpty()) return QRectF();
+	bool f = true;
+	QRectF ret;
+	foreach (QGraphicsItem * i, gi)
+		if (i->isVisible() && (i != &tmp_bus)) {
+			if ((i->data(1007) != "item_selection") && !i->data(1008).toBool()) {
+				QRectF br = i->mapRectToScene(i->boundingRect());
+				//qDebug() << i << br;
+				if (f) ret = br;
+				else ret |= br;
+				f = false;
+			}
+		}
+	return ret;
+}
+
+
 void BlockView::restoreSelState() {
 	foreach (QGraphicsItem * i, sel_items) {
 		i->setPos(i->data(1001).toPointF());
diff --git a/qad/blockview/blockview.h b/qad/blockview/blockview.h
index 4cf76d6..fe05532 100644
--- a/qad/blockview/blockview.h
+++ b/qad/blockview/blockview.h
@@ -82,6 +82,8 @@ public:
 	void fitInView(qreal x, qreal y, qreal w, qreal h, Qt::AspectRatioMode aspectRatioMode = Qt::IgnoreAspectRatio);
 	void fitInView(const QGraphicsItem * item, Qt::AspectRatioMode aspectRatioMode = Qt::IgnoreAspectRatio);
 
+	QRectF itemsBoundingRect() const;
+
 protected:
 	void _init();
 	void _updateBack();
diff --git a/qad/utils/qad_types.cpp b/qad/utils/qad_types.cpp
index e925f31..c09805e 100644
--- a/qad/utils/qad_types.cpp
+++ b/qad/utils/qad_types.cpp
@@ -125,6 +125,17 @@ QString uniqueName(QString n, const QStringList & names) {
 }
 
 
-int lineThickness() {
-	return qMax<int>(qRound(QApplication::fontMetrics().size(0, "0").height() / 15.), 1);
+int fontHeight() {
+	return QApplication::fontMetrics().size(0, "0").height();
+}
+
+
+int lineThickness() {
+	return qMax<int>(qRound(fontHeight() / 15.), 1);
+}
+
+
+QSize preferredIconSize(float x) {
+	int s = qMax<int>(8, qRound(fontHeight() * x));
+	return QSize(s, s);
 }
diff --git a/qad/utils/qad_types.h b/qad/utils/qad_types.h
index 7186ff7..b909b07 100644
--- a/qad/utils/qad_types.h
+++ b/qad/utils/qad_types.h
@@ -117,7 +117,9 @@ inline QRectF enlargedRect(const QRectF & r, qreal dx, qreal dy, qreal v) {
 
 QVariant::Type typeFromLetter(const QString & l);
 QString uniqueName(QString n, const QStringList & names);
+int fontHeight();
 int lineThickness();
+QSize preferredIconSize(float x = 1.f);
 
 
 #endif // QAD_TYPES_H