introduced aristo tool.

TODO:
 * nice icon
 * nice brush
 * fix draw with marker

resources/sankore.qrc

@@ -166,6 +166,7 @@
         <file>images/toolPalette/triangleTool.png</file>
         <file>images/toolPalette/protractorTool.png</file>
         <file>images/toolPalette/compassTool.png</file>
+        <file>images/toolPalette/aristoTool.png</file>
         <file>images/toolPalette/maskTool.png</file>
         <file>images/toolPalette/magnifierTool.png</file>
         <file>images/extraPalette/blackout.png</file>

src/board/UBBoardController.cpp

@@ -1276,6 +1276,11 @@ UBItem *UBBoardController::downloadFinished(bool pSuccess, QUrl sourceUrl, QStri
             mActiveScene->addMask(pPos);
             UBDrawingController::drawingController()->setStylusTool(UBStylusTool::Selector);
         }
+        else if (sourceUrl.toString() == UBToolsManager::manager()->aristo.id)
+        {
+            mActiveScene->addAristo(pPos);
+            UBDrawingController::drawingController()->setStylusTool(UBStylusTool::Selector);
+        }
         else
         {
             showMessage(tr("Unknown tool type %1").arg(sourceUrl.toString()));

src/core/UB.h

@@ -145,6 +145,7 @@ struct UBGraphicsItemType
 		TriangleItemType,
         MagnifierItemType,
         cacheItemType,
+        AristoItemType,
         groupContainerType,
         ToolWidgetItemType
     };

src/domain/UBGraphicsScene.cpp

@@ -39,6 +39,7 @@
 #include "tools/UBGraphicsTriangle.h"
 #include "tools/UBGraphicsCurtainItem.h"
 #include "tools/UBGraphicsCache.h"
+#include "tools/UBGraphicsAristo.h"
 
 #include "document/UBDocumentProxy.h"
 
@@ -2071,6 +2072,22 @@ void UBGraphicsScene::addCompass(QPointF center)
     setModified(true);
 }
 
+void UBGraphicsScene::addAristo(QPointF center)
+{
+    UBGraphicsAristo* aristo = new UBGraphicsAristo();
+    mTools << aristo;
+
+    aristo->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Tool));
+
+    addItem(aristo);
+
+    QPointF itemSceneCenter = aristo->sceneBoundingRect().center();
+    aristo->moveBy(center.x() - itemSceneCenter.x(), center.y() - itemSceneCenter.y());
+
+    aristo->setVisible(true);
+    setModified(true);
+}
+
 void UBGraphicsScene::addCache()
 {
     UBGraphicsCache* cache = new UBGraphicsCache();

src/domain/UBGraphicsScene.h

@@ -220,6 +220,7 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
         void addCompass(QPointF center);
         void addTriangle(QPointF center);
         void addMagnifier(UBMagnifierParams params);
+        void addAristo(QPointF center);
 
         void addMask(const QPointF &center = QPointF());
         void addCache();

src/tools/UBGraphicsAristo.cpp

@@ -0,0 +1,757 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <QGraphicsPolygonItem>
+#include <QPolygonF>
+
+#include "tools/UBGraphicsAristo.h"
+#include "core/UBApplication.h"
+#include "board/UBBoardController.h"
+#include "board/UBDrawingController.h"
+#include "domain/UBGraphicsScene.h"
+
+#include "core/memcheck.h"
+
+const QRect UBGraphicsAristo::sDefaultRect =  QRect(0, 0, 800, 400);
+const UBGraphicsAristo::UBGraphicsAristoOrientation UBGraphicsAristo::sDefaultOrientation = UBGraphicsAristo::Bottom;
+
+UBGraphicsAristo::UBGraphicsAristo()
+    : UBAbstractDrawRuler()
+    , QGraphicsPolygonItem()
+    , angle(0)
+    , mResizing(false)
+    , mRotating(false)
+    , mMarking(false)
+    , mSpan(180)
+    , mStartAngle(0)
+    , mCurrentAngle(0)
+
+
+{
+    setRect(sDefaultRect, sDefaultOrientation);
+
+    create(*this);
+
+    mHFlipSvgItem = new QGraphicsSvgItem(":/images/vflipTool.svg", this);
+    mHFlipSvgItem->setVisible(false);
+    mHFlipSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));
+
+    mResizeSvgItem = new QGraphicsSvgItem(":/images/resizeTool.svg", this);
+    mResizeSvgItem->setVisible(false);
+    mResizeSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));
+
+    mRotateSvgItem = new QGraphicsSvgItem(":/images/rotateTool.svg", this);
+    mRotateSvgItem->setVisible(false);
+    mRotateSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));
+
+    mMarkerSvgItem = new QGraphicsSvgItem(":/images/angleMarker.svg", this);
+    mMarkerSvgItem->setVisible(false);
+    mMarkerSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Tool));
+}
+
+UBGraphicsAristo::~UBGraphicsAristo()
+{
+}
+
+UBItem* UBGraphicsAristo::deepCopy(void) const
+{
+    UBGraphicsAristo* copy = new UBGraphicsAristo();
+    copyItemParameters(copy);
+    return copy;
+}
+
+void UBGraphicsAristo::copyItemParameters(UBItem *copy) const
+{
+    UBGraphicsAristo* cp = dynamic_cast<UBGraphicsAristo*>(copy);
+    if (cp)
+    {   
+        /* TODO: copy all members */
+        cp->setPos(this->pos());
+        cp->setPolygon(this->polygon());
+        cp->setTransform(this->transform());
+    }
+}
+
+void UBGraphicsAristo::setRect(qreal x, qreal y, qreal w, qreal h, UBGraphicsAristoOrientation orientation)
+{
+    QPolygonF polygon;
+    polygon << QPointF(x, y) << QPoint(x, y + h) << QPoint(x+w, y + h);
+    setPolygon(polygon);
+
+    setOrientation(orientation);
+}
+
+void UBGraphicsAristo::setOrientation(UBGraphicsAristoOrientation orientation)
+{
+    mOrientation = orientation;
+    calculatePoints(rect());
+
+    QPolygonF polygon;
+    polygon << A << B << C;
+    setPolygon(polygon);
+}
+
+UBGraphicsScene* UBGraphicsAristo::scene() const
+{
+    return static_cast<UBGraphicsScene*>(QGraphicsPolygonItem::scene());
+}
+
+/* calculatePoints() is used to calculate polygon's apexes coordinates.
+ * This function handles orientation changes too.
+ */
+void UBGraphicsAristo::calculatePoints(const QRectF& r)
+{
+    switch(mOrientation)
+    {
+    case Bottom:
+        A.setX(r.left()); A.setY(r.top());
+        B.setX(r.right()); B.setY(r.top());
+        C.setX(r.center().x()); C.setY(A.y() + r.width() / 2);
+        break;
+    case Top:
+        A.setX(r.left()); A.setY(r.bottom());
+        B.setX(r.right()); B.setY(r.bottom());
+        C.setX(r.center().x()); C.setY(A.y() - r.width() / 2);
+        break;
+    }
+}
+
+void UBGraphicsAristo::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
+{
+    QPolygonF polygon;
+
+    painter->setBrush(Qt::NoBrush);
+    painter->setPen(drawColor());
+
+    polygon << A << B << C;
+    painter->drawPolygon(polygon);
+    polygon.clear();
+
+    paintGraduations(painter);
+
+    mCloseSvgItem->setPos(closeButtonRect().topLeft() + rotationCenter());
+    mHFlipSvgItem->setPos(hFlipRect().topLeft() + rotationCenter());
+    mRotateSvgItem->setPos(rotateRect().topLeft() + rotationCenter());
+    mResizeSvgItem->setPos(resizeButtonRect().topLeft() + rotationCenter());
+
+
+    paintMarker(painter);
+    mMarkerSvgItem->setVisible(true);
+}
+
+QPainterPath UBGraphicsAristo::shape() const
+{
+    QPainterPath tShape;
+    QPolygonF tPolygon;
+
+    tPolygon << A << B << C;
+    tShape.addPolygon(tPolygon);
+    tPolygon.clear();
+
+    return tShape;
+}
+
+/* paintMarker() adjust marker button according to the current angle, draw the line allowing user to set precisely the angle, and draw the current angle's value. */
+void UBGraphicsAristo::paintMarker(QPainter *painter)
+{
+    /* adjusting marker button */
+    mMarkerSvgItem->setPos(markerButtonRect().topLeft() + rotationCenter());
+    mMarkerSvgItem->resetTransform();
+    mMarkerSvgItem->translate(-markerButtonRect().left(), -markerButtonRect().top());
+    mMarkerSvgItem->rotate(mCurrentAngle);
+    mMarkerSvgItem->translate(markerButtonRect().left(), markerButtonRect().top());
+
+    
+    qreal co = cos((mCurrentAngle) * PI/180);
+    qreal si = sin((mCurrentAngle) * PI/180);
+
+    /* Setting point composing the line (from point C) which intersects the line we want to draw. */
+    QPointF referencePoint;
+    if (mOrientation == Bottom) {
+        if ((int)mCurrentAngle % 360 < 90)
+            referencePoint = B;
+        else
+            referencePoint = A;
+    }
+    else if (mOrientation == Top) {
+        if ((int)mCurrentAngle % 360 < 270 && (int)mCurrentAngle % 360 > 0)
+            referencePoint = A;
+        else
+            referencePoint = B;
+    }
+    
+    /* getting intersection point to draw the wanted line */
+    QLineF intersectedLine(rotationCenter(), QPointF(rotationCenter().x()+co, rotationCenter().y()+si)); 
+    QPointF intersectionPoint;
+    if (intersectedLine.intersect(QLineF(referencePoint, C), &intersectionPoint))
+        painter->drawLine(QLineF(intersectionPoint, rotationCenter()));
+
+    /* drawing angle value */
+    qreal rightAngle = mOrientation == Bottom ? mCurrentAngle : 360 - mCurrentAngle;
+
+
+    QString angleText = QString("%1°").arg(rightAngle, 0, 'f', 1);
+
+    QFont font1 = painter->font();
+#ifdef Q_WS_MAC
+    font1.setPointSizeF(font1.pointSizeF() - 3);
+#endif
+    QFontMetricsF fm1(font1);
+
+    if (mOrientation == Bottom)
+        painter->drawText(rotationCenter().x() - fm1.width(angleText)/2 - radius()/8, rotationCenter().y() + radius()/8 - fm1.height()/2, fm1.width(angleText), fm1.height(), Qt::AlignCenter, angleText);
+    else
+        painter->drawText(rotationCenter().x() - fm1.width(angleText)/2 - radius()/8, rotationCenter().y() - radius()/8 - fm1.height()/2, fm1.width(angleText), fm1.height(), Qt::AlignCenter, angleText);
+
+
+}
+
+/* paintGraduations() paints graduations on the ruler side (length graduations) and the two other sides (angle graduation) */
+void UBGraphicsAristo::paintGraduations(QPainter *painter)
+{
+    paintRulerGraduations(painter);
+    paintProtractorGraduations(painter);
+}
+
+void UBGraphicsAristo::paintRulerGraduations(QPainter *painter)
+{
+    /* defining useful constants */
+    const int     centimeterGraduationHeight = 15;
+    const int halfCentimeterGraduationHeight = 10;
+    const int     millimeterGraduationHeight = 5;
+    const int       millimetersPerCentimeter = 10;
+    const int   millimetersPerHalfCentimeter = 5;
+
+    painter->save();
+    painter->setFont(font());
+    QFontMetricsF fontMetrics(painter->font());
+
+    /* Browsing milliters in half width of ruler side */
+    for (int millimeters = 0; millimeters < (rect().width() / 2 - sLeftEdgeMargin - sRoundingRadius) / sPixelsPerMillimeter; millimeters++)
+    {
+        /* defining graduationHeight ; values are different to draw bigger lines if millimiter considered is a centimeter or a half centimeter */
+        int graduationHeight = (0 == millimeters % millimetersPerCentimeter) ?
+            centimeterGraduationHeight :
+            ((0 == millimeters % millimetersPerHalfCentimeter) ?
+                halfCentimeterGraduationHeight : millimeterGraduationHeight);
+
+        /* correcting graduationHeight: draw the line in the other direction in case ruler is top-oriented, to stay inside the tool and inside the rect */
+        graduationHeight = mOrientation == Bottom ? graduationHeight : - graduationHeight;
+        
+        /* drawing graduation to the left and to the right of origin, which is the center of graduated side */
+        painter->drawLine(QLine(rotationCenter().x() + sPixelsPerMillimeter * millimeters, rotationCenter().y(), rotationCenter().x() + sPixelsPerMillimeter * millimeters, rotationCenter().y() + graduationHeight));
+        if (millimeters != 0)
+            painter->drawLine(QLine(rotationCenter().x() - sPixelsPerMillimeter * millimeters, rotationCenter().y(), rotationCenter().x() - sPixelsPerMillimeter * millimeters, rotationCenter().y() + graduationHeight));
+
+        /* drawing associated value if considered graduation is a centimeter */
+        if (0 == millimeters % millimetersPerCentimeter)
+        {
+            /* defining graduation value */
+            QString text = QString("%1").arg((int)(millimeters / millimetersPerCentimeter));
+            
+            /* staying inside polygon */
+            if (rotationCenter().x() + sPixelsPerMillimeter * millimeters + fontMetrics.width(text) / 2 < rect().right())
+            {
+                qreal textWidth = fontMetrics.width(text);
+                qreal textHeight = fontMetrics.tightBoundingRect(text).height() + 5;
+                
+                /* text y-coordinate is different according to tool's orientation */
+                qreal textY = mOrientation == Bottom ? rect().top() + 5 + centimeterGraduationHeight : rect().bottom() - 5 - centimeterGraduationHeight + graduationHeight;
+                
+                /* if text's rect is not out of polygon's bounds, drawing value below or above graduation */
+                QPointF intersectionPoint;
+                
+                bool paint = false;
+
+                if (mOrientation == Bottom && QLineF(QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters - textWidth / 2, rotationCenter().y()), QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters - textWidth / 2, textY + textHeight)).intersect(QLineF(A, C), &intersectionPoint) != QLineF::BoundedIntersection && QLineF(QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters + textWidth / 2, rotationCenter().y()), QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters + textWidth / 2, textY + textHeight)).intersect(QLineF(A, C), &intersectionPoint) != QLineF::BoundedIntersection) {
+                    paint = true;
+                }
+                else if (mOrientation == Top && QLineF(QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters - textWidth / 2, rotationCenter().y()), QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters - textWidth / 2, textY - textHeight)).intersect(QLineF(A, C), &intersectionPoint) != QLineF::BoundedIntersection && QLineF(QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters + textWidth / 2, rotationCenter().y()), QPointF(rotationCenter().x() - sPixelsPerMillimeter * millimeters + textWidth / 2, textY - textHeight)).intersect(QLineF(A, C), &intersectionPoint) != QLineF::BoundedIntersection) {
+                    paint = true;
+                }
+
+                if (paint) {
+                    painter->drawText(
+                        QRectF(rotationCenter().x() + sPixelsPerMillimeter * millimeters - textWidth / 2, textY, textWidth, textHeight),
+                        Qt::AlignVCenter, text);
+                    if (millimeters != 0)
+                        painter->drawText(
+                        QRectF(rotationCenter().x() - sPixelsPerMillimeter * millimeters - textWidth / 2, textY, textWidth, textHeight),
+                        Qt::AlignVCenter, text);
+                }
+            }
+        }
+    }
+    painter->restore();
+}
+
+void UBGraphicsAristo::paintProtractorGraduations(QPainter* painter)
+{
+    /* defining useful constants */
+    const int  tenDegreeGraduationLength = 15;
+    const int fiveDegreeGraduationLength = 10;
+    const int  oneDegreeGraduationLength = 5;
+
+    painter->save();
+
+    QFont font1 = painter->font();
+#ifdef Q_WS_MAC
+    font1.setPointSizeF(font1.pointSizeF() - 3);
+#endif
+    QFontMetricsF fm1(font1);
+
+    //Font for internal arc
+    QFont font2 = painter->font();
+    font2.setPointSizeF(font1.pointSizeF()/1.5);
+    QFontMetricsF fm2(font2);
+
+    /* defining virtual arc diameter */
+    qreal rad = radius();
+
+    QPointF center = rotationCenter();
+
+    /* browsing angles */
+    for (int angle = 1; angle < mSpan; angle++)
+    {
+        int graduationLength = (0 == angle % 10) ? tenDegreeGraduationLength : ((0 == angle % 5) ? fiveDegreeGraduationLength : oneDegreeGraduationLength);
+        
+        qreal co = cos(((qreal)angle + mStartAngle) * PI/180);
+        qreal si = sin(((qreal)angle + mStartAngle) * PI/180);
+
+        /* inverse sinus according to the orientation, to draw graduations on the polygon */
+        si = mOrientation == Bottom ? -si : si;
+
+        /* drawing the graduation around the virtual arc */
+        if (angle >= sArcAngleMargin && angle <= mSpan - sArcAngleMargin)
+            painter->drawLine(QLineF(QPointF(center.x()+ rad/2*co, center.y() - rad/2*si),
+                                    QPointF(center.x()+ (rad/2 + graduationLength)*co,
+                                            center.y() - (rad/2 + graduationLength)*si)));
+
+
+        QPointF intersectionPoint;
+        QLineF referenceLine;
+        if (angle < 90)
+            referenceLine.setP1(B);
+        else
+            referenceLine.setP1(A);
+        referenceLine.setP2(C);
+
+        /* if angle is 10-multiple, drawing it's value, rotated to be easily red */
+        if (0 == angle % 10) {
+            QString grad = QString("%1").arg((int)(angle));
+            QString grad2 = QString("%1").arg((int)mSpan - angle);
+
+            painter->setFont(font2);
+
+            painter->save();
+            painter->translate(center.x() + (rad/2 + graduationLength*1.5)*co, center.y() - (rad/2 + graduationLength*1.5)*si);
+            int degrees = mOrientation == Bottom ? angle : -angle;
+            painter->rotate(-90 + degrees);
+            painter->drawText(- fm2.width(grad)/2, - fm2.height()/2, fm2.width(grad), fm2.height(), Qt::AlignCenter, grad);
+            painter->restore();
+
+            painter->setFont(font1);
+
+            
+            /* drawing the graduation near tool's side */
+            if (QLineF(QPointF(center.x()+ rad/2*co, center.y() - rad/2*si),
+                                     QPointF(center.x()+ (rad/2 + graduationLength)*co,
+                                             center.y() - (rad/2 + graduationLength)*si)).intersect(referenceLine, &intersectionPoint) == QLineF::UnboundedIntersection)
+
+                painter->drawLine(QLineF(QPointF(center.x() + (rad/2 + graduationLength*1.5 + fm2.width(grad)/2)*co,
+                                                 center.y() - (rad/2 + graduationLength*1.5 + fm2.height()/2)*si),
+                                        intersectionPoint));
+
+        }
+
+        /* drawing the graduation near tool's side */
+        else
+            if (QLineF(QPointF(center.x()+ rad/2*co, center.y() - rad/2*si),
+                                     QPointF(center.x()+ (rad/2 + graduationLength)*co,
+                                             center.y() - (rad/2 + graduationLength)*si)).intersect(referenceLine, &intersectionPoint) == QLineF::UnboundedIntersection)
+
+                painter->drawLine(QLineF(QPointF(intersectionPoint.x() - (graduationLength*1.5)*co,
+                                                 intersectionPoint.y() + (graduationLength*1.5)*si),
+                                        intersectionPoint));
+    }
+
+    painter->restore();
+}
+
+
+void UBGraphicsAristo::rotateAroundCenter(qreal angle)
+{
+    qreal oldAngle = this->angle;
+    this->angle = angle;
+    QTransform transform;
+    rotateAroundCenter(transform, rotationCenter());
+    setTransform(transform, true);
+    this->angle = oldAngle + angle; // We have to store absolute value for FLIP case
+}
+
+void UBGraphicsAristo::rotateAroundCenter(QTransform& transform, QPointF center)
+{
+    transform.translate(center.x(), center.y());
+    transform.rotate(angle);
+    transform.translate(- center.x(), - center.y());
+}
+
+void UBGraphicsAristo::resize(qreal factor)
+{
+    prepareGeometryChange();
+    translate(rotationCenter().x(), rotationCenter().y());
+    scale(factor, factor);
+    translate(-rotationCenter().x(), -rotationCenter().y());
+}
+
+
+QPointF UBGraphicsAristo::rotationCenter() const
+{
+    return QPointF((A.x() + B.x()) / 2, (A.y() + B.y()) / 2);
+}
+
+QRectF UBGraphicsAristo::closeButtonRect() const
+{
+    qreal y = radius() / 4 + hFlipRect().height() + 3 + rotateRect().height() + 3;
+    if (mOrientation == Top)
+        y = -y;
+    return QRectF(- mCloseSvgItem->boundingRect().width() / 2, y, mCloseSvgItem->boundingRect().width(), mCloseSvgItem->boundingRect().height());
+}
+
+QRectF  UBGraphicsAristo::resizeButtonRect() const
+{
+    return QRectF((B - rotationCenter()).x() - 100 - mResizeSvgItem->boundingRect().width()/2, - mResizeSvgItem->boundingRect().height()/2, mResizeSvgItem->boundingRect().width(), mResizeSvgItem->boundingRect().height());   
+}
+
+QRectF UBGraphicsAristo::hFlipRect() const
+{
+    qreal y = radius() / 4;
+    if (mOrientation == Top)
+        y = -y;
+
+     return QRectF(- mHFlipSvgItem->boundingRect().width() / 2, y, mHFlipSvgItem->boundingRect().width(), mHFlipSvgItem->boundingRect().height());
+}
+
+QRectF UBGraphicsAristo::rotateRect() const
+{
+    qreal y = radius() / 4 + hFlipRect().height() + 3;
+    if (mOrientation == Top)
+        y = -y;
+    return QRectF(- mRotateSvgItem->boundingRect().width() / 2, y, mRotateSvgItem->boundingRect().width(), mRotateSvgItem->boundingRect().height());
+
+}
+
+QRectF UBGraphicsAristo::markerButtonRect() const
+{
+    return QRectF (radius()/2 - mMarkerSvgItem->boundingRect().width(), - mMarkerSvgItem->boundingRect().height()/2, mMarkerSvgItem->boundingRect().width(), mMarkerSvgItem->boundingRect().height());
+}
+
+QCursor UBGraphicsAristo::flipCursor() const
+{
+    return Qt::ArrowCursor;
+}
+
+QCursor UBGraphicsAristo::resizeCursor() const
+{
+    return Qt::ArrowCursor;
+}
+
+QCursor UBGraphicsAristo::markerCursor() const
+{
+    return Qt::ArrowCursor;
+}
+
+void UBGraphicsAristo::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    switch (toolFromPos(event->pos())) {
+    case Rotate:
+        mRotating = true;
+        event->accept();
+        break;
+    case Resize:
+        mResizing = true;
+        event->accept();
+        break;
+    case MoveMarker:
+        mMarking = true;
+        event->accept();
+        break;
+    default:
+        QGraphicsItem::mousePressEvent(event);
+        break;
+    }
+
+    mShowButtons = false;
+    mHFlipSvgItem->setVisible(false);
+    mCloseSvgItem->setVisible(false);
+    mRotateSvgItem->setVisible(mRotating);
+    mResizeSvgItem->setVisible(mResizing);
+    update();
+}
+
+void UBGraphicsAristo::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+
+    if (!mResizing && !mRotating && !mMarking)
+    {
+        QGraphicsItem::mouseMoveEvent(event);
+    }
+    else
+    {
+        QLineF currentLine(rotationCenter(), event->pos());
+        QLineF lastLine(rotationCenter(), event->lastPos());
+
+        if (mRotating) {
+            
+            rotateAroundCenter(currentLine.angleTo(lastLine));
+        }
+        else if (mResizing) {
+            QPointF delta = event->pos() - event->lastPos();
+            setRect(QRectF(rect().topLeft(), QSizeF(rect().width() + delta.x(), rect().height() + delta.x() / 2)), mOrientation);
+        }
+        else if(mMarking) {
+            qreal angle = currentLine.angleTo(lastLine);
+
+            mCurrentAngle += angle;
+            mCurrentAngle -= (int)(mCurrentAngle/360)*360;
+
+            if (mOrientation == Bottom) {
+                if (mCurrentAngle >= 270)
+                    mCurrentAngle = 0;
+                else if (mCurrentAngle > 180)
+                    mCurrentAngle = 180;
+            }
+            else if (mOrientation == Top) {
+                if (mCurrentAngle < 90)
+                    mCurrentAngle = 360;
+                else if (mCurrentAngle < 180)
+                    mCurrentAngle = 180;
+            }
+            update();
+        }
+
+        event->accept();
+    }
+}
+
+void UBGraphicsAristo::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (mResizing || mRotating || mMarking)
+    {
+        mResizing = false;
+        mRotating = false;
+        mMarking = false;
+        event->accept();
+    }
+    else
+    {
+        switch (toolFromPos(event->pos())) {
+        case Close :
+            hide();
+            emit hidden();
+            break;
+        case HorizontalFlip:
+            /* substracting difference to zero [2pi] twice, to obtain the desired angle */
+            mCurrentAngle -= 2 * (mCurrentAngle - (int)(mCurrentAngle/360)*360) - 360;
+            /* setting new orientation */
+            switch(mOrientation) {
+            case Bottom:
+                setOrientation(Top);
+                break;
+            case Top:
+                setOrientation(Bottom);
+                break;
+            }
+        default:
+            QGraphicsItem::mouseReleaseEvent(event);
+            break;
+        }
+    }
+
+    mShowButtons = true;
+    update();
+    if (scene())
+        scene()->setModified(true);
+}
+
+void UBGraphicsAristo::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
+{
+    UBStylusTool::Enum currentTool = (UBStylusTool::Enum)UBDrawingController::drawingController ()->stylusTool ();
+
+    if (currentTool == UBStylusTool::Selector)  {
+        mShowButtons = true;
+        mHFlipSvgItem->setVisible(true);
+        mRotateSvgItem->setVisible(true);
+        mResizeSvgItem->setVisible(true);
+        mCloseSvgItem->setVisible(true);
+
+        switch (toolFromPos(event->pos())) {
+        case HorizontalFlip:
+            setCursor(flipCursor());
+            break;
+        case Rotate:
+            setCursor(rotateCursor());
+            break;
+        case Resize:
+            setCursor(resizeCursor());
+            break;
+        case MoveMarker:
+            setCursor(markerCursor());
+            break;
+        case Close:
+            setCursor(closeCursor());
+            break;
+        default:
+            setCursor(moveCursor());
+            break;
+        }
+
+        event->accept();
+        update();
+
+    } else if (UBDrawingController::drawingController()->isDrawingTool())  {
+            setCursor(drawRulerLineCursor());
+            UBDrawingController::drawingController()->mActiveRuler = this;
+            event->accept();
+    }
+}
+
+void UBGraphicsAristo::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
+{
+    mShowButtons = false;
+    setCursor(Qt::ArrowCursor);
+    mHFlipSvgItem->setVisible(false);
+    mRotateSvgItem->setVisible(false);
+    mResizeSvgItem->setVisible(false);
+    mCloseSvgItem->setVisible(false);
+    UBDrawingController::drawingController()->mActiveRuler = NULL;
+    event->accept();
+    update();
+}
+
+void UBGraphicsAristo::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    UBStylusTool::Enum currentTool = (UBStylusTool::Enum)UBDrawingController::drawingController ()->stylusTool ();
+
+    if (currentTool == UBStylusTool::Selector)
+    {
+        mShowButtons = true;
+        mHFlipSvgItem->setVisible(true);
+        mRotateSvgItem->setVisible(true);
+        mResizeSvgItem->setVisible(true);
+        mCloseSvgItem->setVisible(true);
+
+        switch (toolFromPos(event->pos())) {
+        case HorizontalFlip:
+            setCursor(flipCursor());
+            break;
+        case Rotate:
+            setCursor(rotateCursor());
+            break;
+        case Resize:
+            setCursor(resizeCursor());
+            break;
+        case MoveMarker:
+            setCursor(markerCursor());
+            break;
+        case Close:
+            setCursor(closeCursor());
+            break;
+        default:
+            setCursor(moveCursor());
+            break;
+        }
+
+        event->accept();
+    }
+    else if (UBDrawingController::drawingController()->isDrawingTool())
+        event->accept();
+}
+
+/*
+ * toolfrompos() returns the item type corresponding to the given position.
+ * This method is used to reduce the amount of code in each event function and improve class' maintainability.
+ * pos: event's position ; a rotation is done to counter elements rotation, like the marker button.
+ */ 
+UBGraphicsAristo::Tool UBGraphicsAristo::toolFromPos(QPointF pos)
+{
+    pos = pos - rotationCenter();
+
+    qreal rotationAngle = mOrientation == Bottom ? - mCurrentAngle : 360 * (int)(mCurrentAngle / 360 + 1) - mCurrentAngle;
+
+    QTransform t;
+    t.rotate(rotationAngle);
+    QPointF p2 = t.map(pos);
+
+    if (resizeButtonRect().contains(pos))
+        return Resize;
+    else if (closeButtonRect().contains(pos))
+        return Close;
+    else if (rotateRect().contains(pos))
+        return Rotate;
+    else if (markerButtonRect().contains(p2))
+        return MoveMarker;
+    else if (hFlipRect().contains(pos))
+        return HorizontalFlip;
+    else if (shape().contains(pos))
+        return Move;
+    else
+        return None;
+}
+
+void UBGraphicsAristo::StartLine(const QPointF &scenePos, qreal width)
+{
+    QPointF itemPos = mapFromScene(scenePos);
+
+    qreal y;
+
+    y = rotationCenter().y();
+
+    if (itemPos.x() < rect().x() + sLeftEdgeMargin)
+            itemPos.setX(rect().x() + sLeftEdgeMargin);
+    if (itemPos.x() > rect().x() + rect().width() - sLeftEdgeMargin)
+            itemPos.setX(rect().x() + rect().width() - sLeftEdgeMargin);
+
+    itemPos.setY(y);
+    itemPos = mapToScene(itemPos);
+
+    scene()->moveTo(itemPos);
+    scene()->drawLineTo(itemPos, width, true);
+}
+
+void UBGraphicsAristo::DrawLine(const QPointF &scenePos, qreal width)
+{
+    QPointF itemPos = mapFromScene(scenePos);
+
+    qreal y;
+
+    y = rotationCenter().y();
+
+    if (itemPos.x() < rect().x() + sLeftEdgeMargin)
+            itemPos.setX(rect().x() + sLeftEdgeMargin);
+    if (itemPos.x() > rect().x() + rect().width() - sLeftEdgeMargin)
+            itemPos.setX(rect().x() + rect().width() - sLeftEdgeMargin);
+
+    itemPos.setY(y);
+    itemPos = mapToScene(itemPos);
+
+    // We have to use "pointed" line for marker tool
+    scene()->drawLineTo(itemPos, width,
+            UBDrawingController::drawingController()->stylusTool() != UBStylusTool::Marker);
+}
+
+void UBGraphicsAristo::EndLine()
+{
+}

src/tools/UBGraphicsAristo.h

@@ -0,0 +1,165 @@
+/*
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UBGRAPHICSARISTO_H_
+#define UBGRAPHICSARISTO_H_
+
+#include <QtGui>
+#include <QtSvg>
+#include <QGraphicsPolygonItem>
+
+#include "core/UB.h"
+#include "domain/UBItem.h"
+#include "tools/UBAbstractDrawRuler.h"
+
+
+class UBGraphicsScene;
+class UBItem;
+
+class UBGraphicsAristo : public UBAbstractDrawRuler, public QGraphicsPolygonItem, public UBItem
+{
+    Q_OBJECT
+
+    public:
+        UBGraphicsAristo();
+        virtual ~UBGraphicsAristo();
+
+        enum { Type = UBGraphicsItemType::AristoItemType };
+        enum Tool {None, Move, Resize, Rotate, Close, MoveMarker, HorizontalFlip};
+
+        virtual int type() const
+        {
+            return Type;
+        }
+
+        virtual UBItem* deepCopy(void) const;
+        virtual void copyItemParameters(UBItem *copy) const;
+
+        virtual void StartLine(const QPointF& scenePos, qreal width);
+        virtual void DrawLine(const QPointF& position, qreal width);
+        virtual void EndLine();
+
+        enum UBGraphicsAristoOrientation
+        {
+                Bottom = 0,
+                Top
+        };
+
+        static UBGraphicsAristoOrientation orientationFromStr(QStringRef& str)
+        {
+            if (str == "Bottom") return Bottom;
+            if (str == "Top") return Top;
+            return sDefaultOrientation;
+        }
+        static QString orientationToStr(UBGraphicsAristoOrientation orientation)
+        {
+            QString result;
+            if (orientation == 0) result = "Bottom";
+            else if (orientation == 1) result = "Top";
+
+            return result;
+        }
+
+        void setRect(const QRectF &rect, UBGraphicsAristoOrientation orientation)
+        {
+            setRect(rect.x(), rect.y(), rect.width(), rect.height(), orientation);
+        }
+
+        void setRect(qreal x, qreal y, qreal w, qreal h, UBGraphicsAristoOrientation orientation);
+
+        void setOrientation(UBGraphicsAristoOrientation orientation);
+
+        UBGraphicsAristoOrientation getOrientation() const {return mOrientation;}
+
+        QRectF rect() const {return boundingRect();}
+
+        UBGraphicsScene* scene() const;
+
+    protected:
+
+        virtual void paint (QPainter *painter, const QStyleOptionGraphicsItem *styleOption, QWidget *widget);
+        virtual QPainterPath shape() const;
+
+        virtual void rotateAroundCenter(qreal angle);
+        virtual void resize(qreal factor);
+
+        virtual QPointF    rotationCenter() const;
+
+        virtual QRectF    closeButtonRect() const;
+        QRectF  resizeButtonRect () const;
+        QRectF    hFlipRect() const;
+        QRectF    rotateRect() const;
+        QRectF markerButtonRect() const;
+
+        QCursor    flipCursor() const;
+        QCursor    resizeCursor() const;
+        QCursor markerCursor() const;
+
+        virtual void    mousePressEvent(QGraphicsSceneMouseEvent *event);
+        virtual void    mouseMoveEvent(QGraphicsSceneMouseEvent *event);
+        virtual void    mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+        virtual void    hoverEnterEvent(QGraphicsSceneHoverEvent *event);
+        virtual void    hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
+        virtual void    hoverMoveEvent(QGraphicsSceneHoverEvent *event);
+
+    private:
+        UBGraphicsAristo::Tool toolFromPos(QPointF pos);
+        QTransform calculateRotationTransform();
+        qreal angle;
+        
+        void rotateAroundCenter(QTransform& transform, QPointF center);
+
+        bool mResizing;
+        bool mRotating;
+        bool mMarking;
+        QRect lastRect;
+        qreal mSpan;
+
+        // Coordinates are transformed....
+        QPoint lastPos;
+        QGraphicsSvgItem* mHFlipSvgItem;
+        QGraphicsSvgItem* mRotateSvgItem;
+        QGraphicsSvgItem* mResizeSvgItem;
+        QGraphicsSvgItem* mMarkerSvgItem;
+        qreal   mStartAngle;
+        qreal mCurrentAngle;
+
+        static const QRect sDefaultRect;
+        static const UBGraphicsAristoOrientation sDefaultOrientation;
+
+        void paintGraduations(QPainter *painter);
+        void paintRulerGraduations(QPainter *painter);
+        void paintProtractorGraduations(QPainter* painter);
+        void paintMarker(QPainter *painter);
+        inline qreal radius () const
+        {
+            return sqrt(((B.x() - A.x())*(B.x() - A.x()))+((B.y() - A.y())*(B.y() - A.y()))) * 9 / 16 - 20;
+        }
+
+
+        UBGraphicsAristoOrientation mOrientation;
+
+        void calculatePoints(const QRectF& rect);
+
+        QPointF A, B, C;
+
+        static const int d = 70; // width of triangle border
+        static const int sArrowLength = 30;
+        static const int sMinWidth = 380;
+        static const int sMinHeight = 200;
+        static const int sArcAngleMargin = 5;
+};
+
+#endif /* UBGRAPHICSARISTO_H_ */

src/tools/UBToolsManager.cpp

@@ -91,6 +91,12 @@ UBToolsManager::UBToolsManager(QObject *parent)
     mDescriptors << cache;
 //  --------------------------------------------------------------------------------
 
+    aristo.id = "uniboardTool://uniboard.mnemis.com/aristo";
+    aristo.icon = QPixmap(":/images/toolPalette/aristoTool.png");
+    aristo.label = tr("Aristo");
+    aristo.version = "1.0";
+    mToolsIcon.insert(aristo.id, ":/images/toolPalette/aristoTool.png");
+    mDescriptors << aristo;
 }
 
 UBToolsManager::~UBToolsManager()

src/tools/UBToolsManager.h

@@ -76,6 +76,7 @@ class UBToolsManager : public QObject
         UBToolDescriptor triangle;
         UBToolDescriptor magnifier;
         UBToolDescriptor cache;
+        UBToolDescriptor aristo;
 
         QString iconFromToolId(QString id) { return mToolsIcon.value(id);}
 

src/tools/tools.pri

@@ -1,8 +1,8 @@
-
 HEADERS     +=  src/tools/UBGraphicsRuler.h \
                 src/tools/UBGraphicsTriangle.h \
                 src/tools/UBGraphicsProtractor.h \
                 src/tools/UBGraphicsCompass.h \
+                src/tools/UBGraphicsAristo.h \
                 src/tools/UBToolsManager.h  \
                 src/tools/UBGraphicsCurtainItem.h \
                 src/tools/UBGraphicsCurtainItemDelegate.h \
@@ -13,6 +13,7 @@ SOURCES      += src/tools/UBGraphicsRuler.cpp \
                 src/tools/UBGraphicsTriangle.cpp \
                 src/tools/UBGraphicsProtractor.cpp \
                 src/tools/UBGraphicsCompass.cpp \
+                src/tools/UBGraphicsAristo.cpp \
                 src/tools/UBToolsManager.cpp \
                 src/tools/UBGraphicsCurtainItem.cpp \
                 src/tools/UBGraphicsCurtainItemDelegate.cpp \