Developer Documentation
functionDisplay.cc
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49 
50 //== INCLUDES =================================================================
51 #include <QWidget>
52 #include <QPainter>
53 #include <QGraphicsLinearLayout>
54 #include <QGraphicsProxyWidget>
55 #include <QGraphicsGridLayout>
56 
57 #include "baseWidget.hh"
58 
59 #include "functionDisplay.hh"
60 #include "elementFunction.hh"
61 #include "text.hh"
62 #include "button.hh"
63 
64 #include "../parser/function.hh"
65 #include "../parser/element.hh"
66 
67 #define BACKGROUND_RED 0x0
68 #define BACKGROUND_GREEN 0x0
69 #define BACKGROUND_BLUE 0x0
70 #define BACKGROUND_ALPHA 0xff
71 
72 
73 //== NAMESPACES ===============================================================
74 namespace VSI {
75 
76 //=============================================================================
77 //
78 // CLASS VSI::FunctionDisplay - IMPLEMENTATION
79 //
80 //=============================================================================
81 
84  scene_ (_scene)
85 {
86  QGraphicsGridLayout *tL = new QGraphicsGridLayout;
87 
88  // If the scene belongs to a function, then display its name and add the "Go back" button
89  if (scene_->function ())
90  {
91 
92  Text *f = new Text (scene_->function ()->function ()->element ()->shortDescription (), this);
93  Text *fn = new Text (scene_->function ()->function ()->shortDescription (), this);
94  Button *goBack = new Button (tr("Go back"), this);
95 
96  f->setBackground (true, false);
97  f->setBrush (Qt::black);
98  f->setBackgroundBrush (Qt::gray);
99  fn->setBackground (true, false);
100  fn->setBrush (Qt::black);
101  fn->setBackgroundBrush (Qt::white);
102  goBack->setBrush (Qt::black);
103  goBack->setBackgroundBrush (Qt::lightGray);
104  goBack->setBackground (true, true);
105 
106  connect (goBack, SIGNAL (pressed ()), BaseWidget::getBaseWidget(), SLOT (popScene ()));
107 
108  QFont font = f->font ();
109  fn->setFont (font);
110  font.setBold (true);
111  f->setFont (font);
112 
113 
114  tL->addItem (f, 0, 0, Qt::AlignVCenter | Qt::AlignLeft);
115  tL->addItem (fn, 0, 1, Qt::AlignVCenter | Qt::AlignLeft);
116  tL->addItem (goBack, 0, 2, Qt::AlignVCenter | Qt::AlignLeft);
117  }
118  // Scene is the main scene
119  else
120  {
121  Text *f = new Text (tr("Main"), this);
122  f->setBackground (true, true);
123  f->setBrush (Qt::black);
124  f->setBackgroundBrush (Qt::white);
125 
126  tL->addItem (f, 0, 0);
127 
128  QFont font = f->font ();
129  font.setBold (true);
130  f->setFont (font);
131  }
132 
133  tL->setHorizontalSpacing (1);
134  tL->setContentsMargins (3, 3, 3, 3);
135  setLayout (tL);
136 
137  setMinimumWidth (tL->preferredWidth());
138 }
139 
140 //------------------------------------------------------------------------------
141 
144 {
145 }
146 
147 //------------------------------------------------------------------------------
148 
150 void FunctionDisplay::paint (QPainter *_painter, const QStyleOptionGraphicsItem *_option, QWidget *_widget)
151 {
152  int w = geometry().width();
153  int h = geometry().height();
154 
155  _painter->setRenderHint(QPainter::Antialiasing, true);
156 
157  _painter->setBrush(QBrush(QColor(BACKGROUND_RED,
158  BACKGROUND_GREEN,
159  BACKGROUND_BLUE,
160  BACKGROUND_ALPHA)));
161 
162  _painter->setPen(QColor(BACKGROUND_RED,
163  BACKGROUND_GREEN,
164  BACKGROUND_BLUE,
165  BACKGROUND_ALPHA));
166 
167  QPainterPath path;
168  path.moveTo (0, 0);
169  path.lineTo (0, h);
170  path.lineTo (w - 10, h);
171  path.arcTo (w - 20, h - 20, 20, 20, -90, 90);
172  path.lineTo (w, 0);
173  path.lineTo (0, 0);
174  _painter->drawPath (path);
175 
176 
177  QLinearGradient lG;
178  QRadialGradient rG;
179 
180  _painter->setPen (Qt::NoPen);
181 
182  lG.setStart (w - 5, 0);
183  lG.setFinalStop(w, 0);
184  lG.setColorAt(0, Qt::transparent);
185  lG.setColorAt(1, QColor (255, 255, 255, 128));
186  _painter->setBrush (lG);
187  _painter->drawRect (w - 5, 0, 5, h - 10);
188 
189  lG.setStart (0, h - 5);
190  lG.setFinalStop (0, h);
191  _painter->setBrush (lG);
192  _painter->drawRect (0, h - 5, w - 10, 5);
193 
194  path = QPainterPath ();
195  path.moveTo (w - 10, h);
196  path.arcTo (w - 20, h - 20, 20, 20, -90, 90);
197  path.lineTo (w - 10, h - 10);
198  path.lineTo (w - 10, h);
199  rG.setCenter (w - 10, h - 10);
200  rG.setFocalPoint(w -10, h - 10);
201  rG.setRadius (10);
202  rG.setColorAt (0, Qt::transparent);
203  rG.setColorAt (0.5, Qt::transparent);
204  rG.setColorAt (1, QColor (255, 255, 255, 128));
205  _painter->setBrush (rG);
206  _painter->drawPath(path);
207 
208  QGraphicsWidget::paint (_painter, _option, _widget);
209 }
210 
211 //------------------------------------------------------------------------------
212 }
213 
const QString & shortDescription() const
Short description.
Definition: element.hh:94
ElementFunction * function()
Associated function.
static BaseWidget * getBaseWidget()
Returns singleton.
Definition: baseWidget.cc:471
FunctionDisplay(GraphicsScene *_scene)
Constructor.
virtual void setBackgroundBrush(QBrush _brush)
Sets the background brush.
Definition: text.cc:385
void setBackground(bool _leftOut, bool _rightOut)
Enables background painting.
Definition: text.cc:306
Element * element() const
Element that this function belongs to.
Definition: function.hh:84
const QString & shortDescription() const
Short description.
Definition: function.hh:90
void paint(QPainter *_painter, const QStyleOptionGraphicsItem *_option, QWidget *_widget=0)
Paints the background.
~FunctionDisplay()
Destructor.
Function * function()
Function class.