src/genericgui/SceneCtrlPortItem.cxx

   1 // Copyright (C) 2006-2022  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include "SceneCtrlPortItem.hxx"
  21 #include "SceneTextItem.hxx"
  22 #include "SceneNodeItem.hxx"
  23 #include "SceneHeaderNodeItem.hxx"
  24 #include "Scene.hxx"
  25 #include "ItemMimeData.hxx"
  26 #include "QtGuiContext.hxx"
  27
  28 // #include "QtGuiContext.hxx"
  29 #include "Menus.hxx"
  30 #include <QGraphicsSceneMouseEvent>
  31 #include <QApplication>
  32 #include <QDrag>
  33 #include <QPixmap>
  34 #include <QBitmap>
  35 // #include <QGraphicsSceneHoverEvent>
  36 // #include <QPointF>
  37
  38 // #include <cassert>
  39
  40 #include "Resource.hxx"
  41
  42 //#define _DEVDEBUG_
  43 #include "YacsTrace.hxx"
  44
  45 using namespace std;
  46 using namespace YACS::ENGINE;
  47 using namespace YACS::HMI;
  48
  49 SceneCtrlPortItem::SceneCtrlPortItem(QGraphicsScene *scene, SceneItem *parent,
  50                                      QString label)
  51   : SceneItem(scene, parent, label), ScenePortItem(label)
  52 {
  53   setText(label);
  54   _width        = Resource::CtrlPort_Width;
  55   _height       = Resource::CtrlPort_Height;
  56   _brushColor   = Resource::CtrlPort_brush;
  57   _hiBrushColor = Resource::CtrlPort_hiBrush;
  58   _penColor     = Resource::CtrlPort_pen;
  59   _hiPenColor   = Resource::CtrlPort_hiPen;
  60 }
  61
  62 SceneCtrlPortItem::~SceneCtrlPortItem()
  63 {
  64 }
  65
  66 void SceneCtrlPortItem::paint(QPainter *painter,
  67                           const QStyleOptionGraphicsItem *option,
  68                           QWidget *widget)
  69 {
  70   //DEBTRACE("ScenePortItem::paint");
  71   painter->save();
  72
  73   QPen pen(getPenColor());
  74   pen.setWidth(Resource::Thickness);
  75   painter->setPen(pen);
  76   SceneHeaderNodeItem* hd = dynamic_cast<SceneHeaderNodeItem*>(_parent);
  77   painter->setBrush(hd->getValidColor());
  78   painter->drawRoundedRect(QRectF(0, 0, Resource::CtrlPort_Width, Resource::CtrlPort_Height), Resource::Radius, Resource::Radius);
  79
  80   painter->restore();
  81 }
  82
  83 void SceneCtrlPortItem::setText(QString label)
  84 {
  85   if (!_text)
  86     _text = new SceneTextItem(_scene,
  87                               this,
  88                               label, true );
  89 }
  90
  91 SceneNodeItem* SceneCtrlPortItem::getParentNode()
  92 {
  93   if (_parent)
  94     return dynamic_cast<SceneNodeItem*>(_parent->getParent());
  95   else
  96     return 0;
  97 }
  98
  99 SubjectNode* SceneCtrlPortItem::getSubjectNode()
 100 {
 101   SceneNodeItem* nodeItem = getParentNode();
 102   if (!nodeItem) return 0;
 103   return dynamic_cast<SubjectNode*>(nodeItem->getSubject());
 104 }
 105
 106 QString SceneCtrlPortItem::getMimeFormat()
 107 {
 108   return "yacs/subjectGate";
 109 }
 110
 111 void SceneCtrlPortItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
 112 {
 113   DEBTRACE("SceneCtrlPortItem::mousePressEvent " << _label.toStdString()
 114            << " " << acceptedMouseButtons ());
 115   if (!_scene->isZooming())
 116     {
 117       getSubjectNode()->select(true);
 118       if (_dragable && (event->button() == _dragButton) && QtGuiContext::getQtCurrent()->isEdition())
 119         {
 120           setCursor(Qt::ClosedHandCursor);
 121           _draging = true;
 122           _dragModifier= event->modifiers() & Qt::ControlModifier;
 123         }
 124     }
 125 }
 126
 127 /*!
 128  * creation of mime data if drag detected.
 129  * setData mime type must be coherent with SchemaModel::mimeTypes to allow drop
 130  * on port item in tree view
 131  */
 132 void SceneCtrlPortItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 133 {
 134   if (_draging)
 135     {
 136       //DEBTRACE("_draging");
 137       if (QLineF(event->screenPos(),
 138                  event->buttonDownScreenPos(_dragButton)).length()
 139           < QApplication::startDragDistance())
 140         {
 141           return;
 142         }
 143       DEBTRACE("in drag");
 144       QDrag *drag = new QDrag(event->widget());
 145       ItemMimeData *mime = new ItemMimeData;
 146       drag->setMimeData(mime);
 147       mime->setSubject(getSubjectNode());
 148       mime->setData(getMimeFormat(), "_subject");
 149
 150       QPixmap pixmap(34, 34);
 151       pixmap.fill(Qt::white);
 152
 153       QPainter painter(&pixmap);
 154       painter.translate(15, 15);
 155       painter.setRenderHint(QPainter::Antialiasing);
 156       paint(&painter, 0, 0);
 157       painter.end();
 158
 159       pixmap.setMask(pixmap.createHeuristicMask());
 160
 161       drag->setPixmap(pixmap);
 162       drag->setHotSpot(QPoint(15, 20));
 163
 164       drag->exec();
 165       setCursor(Qt::ArrowCursor);
 166       _draging = false;
 167       _dragModifier= false;
 168     }
 169 }
 170
 171 void SceneCtrlPortItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 172 {
 173   if (_draging)
 174     {
 175       setCursor(Qt::ArrowCursor);
 176     }
 177   _draging = false;
 178   _dragModifier= false;
 179 }