From fe60af400f8bb9e969abf6c9a877ed256df8cd23 Mon Sep 17 00:00:00 2001
From: Lukáš Lalinský <lalinsky@gmail.com>
Date: Sun, 4 Jan 2009 13:28:12 +0100
Subject: Unify the way of storing positions in the exported XML

---
 src/diagramitem.cpp | 14 +++-----------
 src/domutils.h      | 23 +++++++++++++++++++++++
 src/line.cpp        | 10 ++--------
 3 files changed, 28 insertions(+), 19 deletions(-)

diff --git a/src/diagramitem.cpp b/src/diagramitem.cpp
index 1d32ff3..a85f4ff 100644
--- a/src/diagramitem.cpp
+++ b/src/diagramitem.cpp
@@ -20,6 +20,7 @@
 #include "diagramdocument.h"
 #include "diagramitem.h"
 #include "diagramitemfactory.h"
+#include "domutils.h"
 
 DiagramItem::DiagramItem(DiagramItem *parent)
 	: QGraphicsItem(parent)
@@ -36,13 +37,7 @@ void
 DiagramItem::loadFromXml(QDomElement element, DiagramDocument *)
 {
 	setId(element.attribute("id", QUuid()));
-	QDomElement positionElement = element.firstChildElement("position");
-	if (!positionElement.isNull()) {
-		QPointF pos;
-		pos.setX(positionElement.attribute("x", "0").toDouble());
-		pos.setY(positionElement.attribute("y", "0").toDouble());
-		setPos(pos);
-	}
+	setPos(readPointElement(element, "position"));
 }
 
 void
@@ -50,10 +45,7 @@ DiagramItem::saveToXml(QDomDocument doc, QDomElement element)
 {
 	element.setAttribute("type", typeName());
 	element.setAttribute("id", id());
-	QDomElement positionElement = doc.createElement("position");
-	positionElement.setAttribute("x", pos().x());
-	positionElement.setAttribute("y", pos().y());
-	element.appendChild(positionElement);
+	appendPointElement(doc, element, "position", pos());
 }
 
 QMimeData *
diff --git a/src/domutils.h b/src/domutils.h
index 4b7c0ed..06b2cf4 100644
--- a/src/domutils.h
+++ b/src/domutils.h
@@ -118,4 +118,27 @@ readFloatElement(QDomElement &parent, const QString &name, qreal defaultValue =
 	return defaultValue;
 }
 
+inline void
+appendPointElement(QDomDocument &doc, QDomElement &parent, const QString &name, QPointF value)
+{
+	if (!value.isNull()) {
+		QDomElement element = doc.createElement(name);
+		appendFloatElement(doc, element, "x", value.x());
+		appendFloatElement(doc, element, "y", value.y());
+		parent.appendChild(element);
+	}
+}
+
+inline QPointF
+readPointElement(QDomElement &parent, const QString &name)
+{
+	QDomElement element = parent.firstChildElement(name);
+	if (!element.isNull()) {
+		qreal x = readFloatElement(element, "x");
+		qreal y = readFloatElement(element, "y");
+		return QPointF(x, y);
+	}
+	return QPointF();
+}
+
 #endif
diff --git a/src/line.cpp b/src/line.cpp
index 21c1d7a..1691820 100644
--- a/src/line.cpp
+++ b/src/line.cpp
@@ -59,10 +59,7 @@ Line::loadFromXml(QDomElement element, DiagramDocument *document)
 		Connector *connector = m_connectors[i++];
 		qreal angle = readFloatElement(connectorElement, "angle");
 		connector->setAngle(angle);
-		QDomElement positionElement = connectorElement.firstChildElement("position");
-		qreal x = readFloatElement(positionElement, "x");
-		qreal y = readFloatElement(positionElement, "y");
-		connector->setPos(QPointF(x, y));
+		connector->setPos(readPointElement(connectorElement, "position"));
 		QDomElement hubElement = connectorElement.firstChildElement("hub");
 		QString ownerId = hubElement.attribute("owner");
 		if (document && !ownerId.isEmpty()) {
@@ -85,10 +82,7 @@ Line::saveToXml(QDomDocument doc, QDomElement element)
 		Connector *connector = m_connectors[i];
 		QDomElement connectorElement = doc.createElement("connector");
 		connectorListElement.appendChild(connectorElement);
-		QDomElement positionElement = doc.createElement("position");
-		connectorElement.appendChild(positionElement);
-		appendFloatElement(doc, positionElement, "x", connector->pos().x());
-		appendFloatElement(doc, positionElement, "y", connector->pos().y());
+		appendPointElement(doc, connectorElement, "position", connector->pos());
 		appendFloatElement(doc, connectorElement, "angle", connector->angle());
 		if (connector->hub()) {
 			QDomElement hubElement = doc.createElement("hub");
-- 
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