Fix Vertex hover behaviour

Refactor to reduce duplicate code
Fix Section face color mix on hover

src/Mod/TechDraw/Gui/QGIPrimPath.cpp

@@ -0,0 +1,133 @@
+/***************************************************************************
+ *   Copyright (c) 2016 WandererFan <wandererfan@gmail.com>                *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  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 Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "PreCompiled.h"
+#ifndef _PreComp_
+#include <assert.h>
+#include <QGraphicsScene>
+#include <QGraphicsSceneHoverEvent>
+#include <QMouseEvent>
+#include <QPainter>
+#include <QPainterPathStroker>
+#include <QStyleOptionGraphicsItem>
+#endif
+
+#include <App/Application.h>
+#include <App/Material.h>
+#include <Base/Console.h>
+#include <Base/Parameter.h>
+
+#include "QGIPrimPath.h"
+#include "QGIView.h"
+
+using namespace TechDrawGui;
+
+QGIPrimPath::QGIPrimPath()
+{
+    setCacheMode(QGraphicsItem::NoCache);
+    setFlag(QGraphicsItem::ItemIsSelectable, true);
+    setFlag(QGraphicsItem::ItemIsMovable, false);
+    setFlag(QGraphicsItem::ItemSendsScenePositionChanges, true);
+    setFlag(QGraphicsItem::ItemSendsGeometryChanges,true);
+    setAcceptHoverEvents(true);
+
+    isHighlighted = false;
+
+    Base::Reference<ParameterGrp> hGrp = App::GetApplication().GetUserParameter()
+        .GetGroup("BaseApp")->GetGroup("Preferences")->GetGroup("Mod/TechDraw/Colors");
+    App::Color fcColor = App::Color((uint32_t) hGrp->GetUnsigned("NormalColor", 0x00000000));
+    m_colNormal = fcColor.asValue<QColor>();
+    fcColor.setPackedValue(hGrp->GetUnsigned("SelectColor", 0x0000FF00));
+    m_colSel = fcColor.asValue<QColor>();
+    fcColor.setPackedValue(hGrp->GetUnsigned("PreSelectColor", 0x00080800));
+    m_colPre = fcColor.asValue<QColor>();
+
+    setPrettyNormal();
+
+    m_pen.setColor(m_colNormal);
+    m_pen.setStyle(Qt::SolidLine);
+    m_pen.setCapStyle(Qt::RoundCap);
+}
+
+QVariant QGIPrimPath::itemChange(GraphicsItemChange change, const QVariant &value)
+{
+    if (change == ItemSelectedHasChanged && scene()) {
+        if(isSelected()) {
+            setPrettySel();
+        } else {
+            setPrettyNormal();
+        }
+    }
+    return QGraphicsPathItem::itemChange(change, value);
+}
+
+void QGIPrimPath::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
+{
+    if (!isSelected()) {
+        setPrettyPre();
+    }
+    QGraphicsPathItem::hoverEnterEvent(event);
+}
+
+void QGIPrimPath::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
+{
+    QGIView *view = dynamic_cast<QGIView *> (parentItem());    //this is temp for debug??
+    assert(view != 0);
+    if(!isSelected() && !isHighlighted) {
+        setPrettyNormal();
+    }
+    QGraphicsPathItem::hoverLeaveEvent(event);
+}
+
+void QGIPrimPath::setHighlighted(bool b)
+{
+    isHighlighted = b;
+    if(isHighlighted) {
+        setPrettySel();
+    } else {
+        setPrettyNormal();
+    }
+}
+
+void QGIPrimPath::setPrettyNormal() {
+    m_colCurrent = m_colNormal;
+    update();
+}
+
+void QGIPrimPath::setPrettyPre() {
+    m_colCurrent = m_colPre;
+    update();
+}
+
+void QGIPrimPath::setPrettySel() {
+    m_colCurrent = m_colSel;
+    update();
+}
+
+void QGIPrimPath::paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget) {
+    QStyleOptionGraphicsItem myOption(*option);
+    myOption.state &= ~QStyle::State_Selected;
+
+    m_pen.setColor(m_colCurrent);
+    setPen(m_pen);
+    QGraphicsPathItem::paint (painter, &myOption, widget);
+}