graphic fix

libs/graphic/graphic_conf.cpp

@@ -22,7 +22,6 @@ GraphicType::GraphicType(QString name_, QColor color, Qt::PenStyle style, double
 	name       = name_;
 	visible    = visible_;
 	pointWidth = 2.;
-	pb         = new QCheckBox(name);
 }
 
 
@@ -34,6 +33,20 @@ void GraphicType::removeData() {
 }
 
 
+bool GraphicType::init() {
+	if (pb) return false;
+	pb = new QCheckBox(name);
+	return true;
+}
+
+
+void GraphicType::destroy() {
+	if (!pb) return;
+	delete pb;
+	pb = nullptr;
+}
+
+
 // GraphicConf
 
 GraphicConf::GraphicConf(QVector<GraphicType> & graphics_, QWidget * parent): QDialog(parent), graphics(graphics_) {