Show scene origins.

--HG--
branch : develop

src/app/valentina/xml/vpattern.cpp

@@ -2692,7 +2692,9 @@ void VPattern::PrepareForParse(const Document &parse)
     {
         TestUniqueId();
         sceneDraw->clear();
+        sceneDraw->InitOrigins();
         sceneDetail->clear();
+        sceneDetail->InitOrigins();
         data->ClearForFullParse();
         nameActivPP.clear();
         patternPieces.clear();

src/libs/vwidgets/vmaingraphicsscene.cpp

@@ -32,12 +32,16 @@
 #include <QGraphicsItem>
 #include <QApplication>
 
+#include "../vmisc/def.h"
+#include "../ifc/ifcdef.h"
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief VMainGraphicsScene default constructor.
  */
 VMainGraphicsScene::VMainGraphicsScene()
-    :QGraphicsScene(), horScrollBar(0), verScrollBar(0), scaleFactor(1), _transform(QTransform()), scenePos(QPointF())
+    :QGraphicsScene(), horScrollBar(0), verScrollBar(0), scaleFactor(1), _transform(QTransform()), scenePos(QPointF()),
+      origins()
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -48,7 +52,7 @@ VMainGraphicsScene::VMainGraphicsScene()
  */
 VMainGraphicsScene::VMainGraphicsScene(const QRectF & sceneRect, QObject * parent)
     :QGraphicsScene ( sceneRect, parent ), horScrollBar(0), verScrollBar(0), scaleFactor(1), _transform(QTransform()),
-      scenePos(QPointF())
+      scenePos(QPointF()), origins()
 {}
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -82,6 +86,108 @@ void VMainGraphicsScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
     }
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void VMainGraphicsScene::InitOrigins()
+{
+    qDeleteAll(origins);
+
+    QPen originsPen(Qt::green, ToPixel(WidthHairLine(Unit::Mm), Unit::Mm), Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
+    QBrush axisTextBrush(Qt::green);
+    const qreal arrowAngle = 35.0;
+    const qreal arrowLength = 12.0;
+
+    {
+        // X axis
+        const QLineF lineX(QPointF(25, 0), QPointF(-5, 0));
+        QGraphicsLineItem *xLine1 = new QGraphicsLineItem(lineX);
+        xLine1->setPen(originsPen);
+        xLine1->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        xLine1->setZValue(-1.0);
+        addItem(xLine1);
+        origins.append(xLine1);
+
+        // Arrow left side
+        QLineF arrowLeftLine = lineX;
+        arrowLeftLine.setAngle(arrowLeftLine.angle()-arrowAngle);
+        arrowLeftLine.setLength(arrowLength);
+        QGraphicsLineItem *xLine2 = new QGraphicsLineItem(arrowLeftLine);
+        xLine2->setPen(originsPen);
+        xLine2->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        xLine2->setZValue(-1.0);
+        addItem(xLine2);
+        origins.append(xLine2);
+
+        // Arrow right side
+        QLineF arrowRightLine = lineX;
+        arrowRightLine.setAngle(arrowRightLine.angle()+arrowAngle);
+        arrowRightLine.setLength(arrowLength);
+        QGraphicsLineItem *xLine3 = new QGraphicsLineItem(arrowRightLine);
+        xLine3->setPen(originsPen);
+        xLine3->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        xLine3->setZValue(-1.0);
+        addItem(xLine3);
+        origins.append(xLine3);
+
+        // X axis text
+        QGraphicsSimpleTextItem *xOrigin = new QGraphicsSimpleTextItem(QStringLiteral("X"), xLine1);
+        xOrigin->setBrush(axisTextBrush);
+        xOrigin->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        xOrigin->setZValue(-1.0);
+        xOrigin->setPos(25, -(xOrigin->boundingRect().height()/2));
+        origins.append(xOrigin);
+    }
+
+    {
+        // Y axis
+        const QLineF lineY(QPointF(0, 25), QPointF(0, -5));
+        QGraphicsLineItem *yLine1 = new QGraphicsLineItem(lineY);
+        yLine1->setPen(originsPen);
+        yLine1->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        yLine1->setZValue(-1.0);
+        addItem(yLine1);
+        origins.append(yLine1);
+
+        // Arrow left side
+        QLineF arrowLeftLine = lineY;
+        arrowLeftLine.setAngle(arrowLeftLine.angle()-arrowAngle);
+        arrowLeftLine.setLength(arrowLength);
+        QGraphicsLineItem *yLine2 = new QGraphicsLineItem(arrowLeftLine);
+        yLine2->setPen(originsPen);
+        yLine2->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        yLine2->setZValue(-1.0);
+        addItem(yLine2);
+        origins.append(yLine2);
+
+        // Arrow right side
+        QLineF arrowRightLine = lineY;
+        arrowRightLine.setAngle(arrowRightLine.angle()+arrowAngle);
+        arrowRightLine.setLength(arrowLength);
+        QGraphicsLineItem *yLine3 = new QGraphicsLineItem(arrowRightLine);
+        yLine3->setPen(originsPen);
+        yLine3->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        yLine3->setZValue(-1.0);
+        addItem(yLine3);
+        origins.append(yLine3);
+
+        // Y axis text
+        QGraphicsSimpleTextItem *yOrigin = new QGraphicsSimpleTextItem(QStringLiteral("Y"), yLine1);
+        yOrigin->setBrush(axisTextBrush);
+        yOrigin->setFlag(QGraphicsItem::ItemIgnoresTransformations);
+        yOrigin->setZValue(-1.0);
+        yOrigin->setPos(-(yOrigin->boundingRect().width()/2), 25);
+        origins.append(yOrigin);
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VMainGraphicsScene::SetOriginsVisible(bool visible)
+{
+    foreach (QGraphicsItem *item, origins)
+    {
+        item->setVisible(visible);
+    }
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 QPointF VMainGraphicsScene::getScenePos() const
 {

src/libs/vwidgets/vmaingraphicsscene.h

@@ -51,6 +51,8 @@ public:
     QPointF       getScenePos() const;
 
     QRectF        VisibleItemsBoundingRect() const;
+    void          InitOrigins();
+    void          SetOriginsVisible(bool visible);
 public slots:
     void          ChoosedItem(quint32 id, const SceneObject &type);
     void          SetFactor(qreal factor);
@@ -97,6 +99,7 @@ private:
     /** @brief _transform view transform value. */
     QTransform    _transform;
     QPointF       scenePos;
+    QVector<QGraphicsItem *> origins;
 };
 
 //---------------------------------------------------------------------------------------------------------------------

src/libs/vwidgets/vmaingraphicsview.cpp

@@ -266,7 +266,9 @@ void VMainGraphicsView::ZoomFitBest()
 {
     VMainGraphicsScene *currentScene = qobject_cast<VMainGraphicsScene *>(scene());
     SCASSERT(currentScene);
+    currentScene->SetOriginsVisible(false);
     const QRectF rect = currentScene->VisibleItemsBoundingRect();
+    currentScene->SetOriginsVisible(true);
     if (rect.isEmpty())
     {
         return;