diff --git a/qad/widgets/scroll_spin_box.cpp b/qad/widgets/scroll_spin_box.cpp
index ca5e87f..e1ff155 100644
--- a/qad/widgets/scroll_spin_box.cpp
+++ b/qad/widgets/scroll_spin_box.cpp
@@ -32,6 +32,7 @@ ScrollSpinBox::ScrollSpinBox(QWidget * parent): QWidget(parent) {
 	ui->setupUi(this);
 	ui->spin->setPrecision(3);
 	ui->handle->installEventFilter(this);
+	connect(ui->spin, SIGNAL(valueChanged(double)), this, SIGNAL(valueChanged(double)));
 	last_value = 0.;
 	sensivity_ = 0.2;
 	scroll_scale = sensivity_ / 10;
@@ -44,6 +45,11 @@ EvalSpinBox * ScrollSpinBox::spin() {
 }
 
 
+double ScrollSpinBox::value() const {
+	return ui->spin->value();
+}
+
+
 void ScrollSpinBox::changeEvent(QEvent * e) {
 	QWidget::changeEvent(e);
 	switch (e->type()) {
@@ -91,7 +97,8 @@ void ScrollSpinBox::mousePress(QMouseEvent * e) {
 	if (e->button() == Qt::LeftButton) {
 		down_pos = e->pos();
 		last_text = ui->spin->expression();
-		last_value = ui->spin->value();
+		last_value = qAbs(ui->spin->value());
+		if (last_value == 0.) last_value = 1.;
 	}
 }
 
@@ -107,7 +114,12 @@ void ScrollSpinBox::mouseMove(QMouseEvent * e) {
 		double dv = (down_pos.y() - e->pos().y()) * scroll_scale;
 		if (dv != 0.) {
 			QCursor::setPos(ui->handle->mapToGlobal(down_pos));
-			ui->spin->setValue(ui->spin->value() + qAbs(last_value) * dv);
+			ui->spin->setValue(ui->spin->value() + last_value * dv);
 		}
 	}
 }
+
+
+void ScrollSpinBox::setValue(double v) {
+	ui->spin->setValue(v);
+}
diff --git a/qad/widgets/scroll_spin_box.h b/qad/widgets/scroll_spin_box.h
index b87fa89..16f010c 100644
--- a/qad/widgets/scroll_spin_box.h
+++ b/qad/widgets/scroll_spin_box.h
@@ -30,10 +30,12 @@ class ScrollSpinBox: public QWidget
 {
 	Q_OBJECT
 	Q_PROPERTY(double sensivity READ sensivity WRITE setSensivity)
+	Q_PROPERTY(double value READ value WRITE setValue)
 public:
 	explicit ScrollSpinBox(QWidget * parent = 0);
 
 	EvalSpinBox * spin();
+	double value() const;
 	double sensivity() const {return sensivity_;}
 
 protected:
@@ -52,6 +54,10 @@ protected:
 
 public slots:
 	void setSensivity(double s) {sensivity_ = s;}
+	void setValue(double v);
+
+signals:
+	void valueChanged(double);
 
 };