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connectionPoint.cc
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49 
50 //== INCLUDES =================================================================
51 #include <QPolygonF>
52 #include <QGraphicsItem>
53 #include <QFontMetrics>
54 #include <QPainter>
55 
56 #include "connectionPoint.hh"
57 #include "connection.hh"
58 #include "elementInOut.hh"
59 #include "graphicsScene.hh"
60 #include "elementArea.hh"
61 #include "text.hh"
62 #include "../parser/inout.hh"
63 
64 #define SIZE 20
65 
66 //== NAMESPACES ===============================================================
67 namespace VSI {
68 
69 //=============================================================================
70 //
71 // CLASS VSI::ConnectionPoint - IMPLEMENTATION
72 //
73 //=============================================================================
74 
75 
76 QColor colors_[] = { QColor(255, 0, 0),
77  QColor(255, 0, 255),
78  QColor(255, 128, 0),
79  QColor(224, 224, 0),
80  QColor(0, 192, 0),
81  QColor(0, 0, 255) };
82 
83 //------------------------------------------------------------------------------
84 
86 ConnectionPoint::ConnectionPoint (ElementInOut *_e, QGraphicsItem *_parent) :
87  QGraphicsEllipseItem (_parent),
88  inout_ (_e),
89  width_ (5)
90 {
91  setRect (0, 0, width_, width_);
92 
93  setBrush (QColor (64,64,64));
94 
95  setAcceptHoverEvents (true);
96 }
97 
98 //------------------------------------------------------------------------------
99 
102 {
103 }
104 
105 //------------------------------------------------------------------------------
106 
108 void ConnectionPoint::setGeometry (const QRectF &_rect)
109 {
110  QGraphicsEllipseItem::setPos (_rect.topLeft ());
111  QGraphicsLayoutItem::setGeometry (_rect);
112  setRect (0, 0, width_, width_);
113 }
114 
115 //------------------------------------------------------------------------------
116 
117 // size informations for layouting
118 QSizeF ConnectionPoint::sizeHint (Qt::SizeHint _which, const QSizeF &/*_constraint*/) const
119 {
120  QSizeF sh;
121  switch (_which) {
122  case Qt::MinimumSize:
123  case Qt::PreferredSize:
124  case Qt::MaximumSize:
125  sh = QSizeF(width_, width_);
126  break;
127  default:
128  break;
129  }
130 
131  return sh;
132 }
133 
134 //------------------------------------------------------------------------------
135 
136 // start a new connection on press
137 void ConnectionPoint::mousePressEvent (QGraphicsSceneMouseEvent *_event)
138 {
139  Connection *c = new Connection (this, scene ());
140  static_cast<GraphicsScene *>(scene ())->setActiveConnection (c);
141  QGraphicsEllipseItem::mousePressEvent(_event);
142 }
143 
144 //------------------------------------------------------------------------------
145 
148 {
149  QGraphicsItem *elementArea = dynamic_cast<GraphicsScene *> (scene ())->elementArea ();
150 
151  if (inout_->type () == ElementInOut::TypeInput)
152  return elementArea->mapFromScene (mapToScene (QPointF (0, width_ / 2)));
153  return elementArea->mapFromScene (mapToScene (QPointF (width_, width_ / 2)));
154 }
155 
156 //------------------------------------------------------------------------------
157 
160 {
161  setBrush (colors_[_state]);
162 
163  QString stateStr;
164 
165  switch (_state)
166  {
167  case NoValue:
168  stateStr = "[NOT CONNECTED]";
169  break;
170  case Optional:
171  stateStr = "[OPTIONAL]";
172  break;
173  case RuntimeInput:
174  stateStr = "[ASK DURING EXECUTION]";
175  break;
176  case UserInput:
177  stateStr = "[CONSTANT SET]";
178  break;
179  case Connected:
180  stateStr = "[CONNECTED]";
181  break;
182  case OutputNotConnected:
183  stateStr = "[NOT CONNECTED]";
184  break;
185  }
186 
187  stateStr += " " + inout_->inOut ()->longDescription () + " (" + inout_->inOut ()->typeString () + ")";
188  setToolTip (stateStr);
189  inout_->typeTextItem ()->setToolTip (stateStr);
190  inout_->descriptionTextItem ()->setToolTip (stateStr);
191 }
192 
193 //------------------------------------------------------------------------------
194 
195 // highlight connection if mouse over
196 void ConnectionPoint::hoverEnterEvent (QGraphicsSceneHoverEvent * /*_event*/)
197 {
198  foreach (Connection *c, inout_->connections ())
199  {
200  QPen p = c->pen ();
201 
202  if (inOut ()->inOut ()->typeString () == "data")
203  p.setWidth (6);
204  else
205  p.setWidth (4);
206 
207  p.setColor (QColor (0, 0, 255));
208  c->setPen (p);
209  }
210 }
211 
212 //------------------------------------------------------------------------------
213 
214 // remove highlight
215 void ConnectionPoint::hoverLeaveEvent (QGraphicsSceneHoverEvent * /*_event*/)
216 {
217  foreach (Connection *c, inout_->connections ())
218  {
219  QPen p = c->pen ();
220 
221  if (inOut ()->inOut ()->typeString () == "data")
222  p.setWidth (4);
223  else
224  p.setWidth (2);
225 
226  p.setColor (QColor (0, 0, 0));
227  c->setPen (p);
228  }
229 }
230 
231 //------------------------------------------------------------------------------
232 
235 {
236  width_ = _width;
237  updateGeometry ();
238 }
239 
240 //------------------------------------------------------------------------------
241 
242 // painting
243 void ConnectionPoint::paint(QPainter *_painter, const QStyleOptionGraphicsItem * _option, QWidget *_widget)
244 {
245  QGraphicsEllipseItem::paint (_painter, _option, _widget);
246 
247  float wH = width_ / 2.0;
248  float wT = width_ / 3.0;
249  float wS = width_ / 6.0;
250 
251  QPainterPath path;
252  path.moveTo (0, 0);
253  path.arcTo (0, 0, width_, width_, 0, 360);
254 
255  QRadialGradient rG (QPointF(width_ * 0.8, width_), width_ * 0.8);
256  rG.setColorAt(0, QColor (255, 255, 255, 128));
257  rG.setColorAt(1, Qt::transparent);
258  _painter->setBrush (rG);
259  _painter->setPen (Qt::NoPen);
260  _painter->drawPath (path);
261 
262  path = QPainterPath ();
263  path.moveTo (1, wH);
264  path.arcTo (1, 1, width_ - 2, width_ - 2, 180, - 165);
265  path.cubicTo (QPointF (wH + wT, wH + wS), QPointF (wH + wS, wH - wS), QPointF (wH, wH));
266  path.cubicTo (QPointF (wT, wH + wS), QPointF (wS, wH + wS), QPointF (1, wH));
267 
268  rG.setCenter (wS, 0);
269  rG.setFocalPoint(wS, 0);
270  rG.setRadius (width_);
271  rG.setColorAt(0, Qt::white);
272  rG.setColorAt(1, Qt::transparent);
273  _painter->setBrush (rG);
274  _painter->setPen (Qt::NoPen);
275  _painter->drawPath(path);
276 }
277 
278 //------------------------------------------------------------------------------
279 }
~ConnectionPoint()
Destructor.
virtual void setGeometry(const QRectF &_rect)
Sets the geometry.
void setWidth(int _width)
Sets the diameter.
InOut * inOut() const
InOut context object.
void setState(State _state)
sets the state
Text * descriptionTextItem() const
Short description widget.
ElementInOut * inOut() const
Input/output element.
QList< Connection * > connections() const
Connections.
QPointF connectPos()
Position for connections.
ConnectionPoint(ElementInOut *_e, QGraphicsItem *_parent)
Constructor.
virtual Type type() const =0
Type.
QString typeString() const
Type.
Definition: inout.cc:71
Text * typeTextItem() const
Type text widget.
Definition: elementInOut.hh:98
const QString & longDescription() const
Long description.
Definition: inout.hh:82
State
State of the connection point.