Developer Documentation
trash.cc
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49 
50 //== INCLUDES =================================================================
51 #include <QPixmap>
52 #include <QGraphicsItem>
53 #include <QGraphicsSceneMouseEvent>
54 
56 
57 #include "trash.hh"
58 #include "graphicsScene.hh"
59 #include "sceneElement.hh"
60 
61 //== NAMESPACES ===============================================================
62 namespace VSI {
63 
64 //=============================================================================
65 //
66 // CLASS VSI::Trash - IMPLEMENTATION
67 //
68 //=============================================================================
69 
70 
72 Trash::Trash (GraphicsScene *_scene, QGraphicsItem *_parent) :
73  QGraphicsPixmapItem (_parent),
74  scene_ (_scene)
75 {
76  setPixmap (OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"user-trash.png");
77 
78  setOpacity (0.4);
79 
80  setAcceptHoverEvents (true);
81 }
82 
83 //------------------------------------------------------------------------------
84 
87 {
88 }
89 
90 //------------------------------------------------------------------------------
91 
92 // make the trash opaque if mouse is over and we have selected elements
93 void Trash::hoverEnterEvent (QGraphicsSceneHoverEvent * /*_event*/)
94 {
95  if (!scene_->selectedItems ().isEmpty ())
96  setOpacity (1.0);
97 }
98 
99 //------------------------------------------------------------------------------
100 
101 // make trash transparent on mouse leave
102 void Trash::hoverLeaveEvent (QGraphicsSceneHoverEvent * /*_event*/)
103 {
104  setOpacity (0.4);
105 }
106 
107 //------------------------------------------------------------------------------
108 
109 // delete selected elements on mouse press
110 void Trash::mousePressEvent (QGraphicsSceneMouseEvent * /*_event*/)
111 {
112  if (!scene_->selectedItems ().isEmpty ())
113  foreach (QGraphicsItem *e, scene_->selectedItems ())
114  {
115  SceneElement *se = dynamic_cast<SceneElement *> (e);
116  if (se && scene_->removeElement (se))
117  delete se;
118  }
119 }
120 
121 //------------------------------------------------------------------------------
122 
125 {
126  setOpacity (1.0);
127 }
128 
129 //------------------------------------------------------------------------------
130 
133 {
134  setOpacity (0.4);
135 }
136 
137 //------------------------------------------------------------------------------
138 
140 void Trash::setGeometry (const QRectF &_rect)
141 {
142  QGraphicsPixmapItem::setPos (_rect.topLeft ());
143  QGraphicsLayoutItem::setGeometry (_rect);
144 }
145 
146 //------------------------------------------------------------------------------
147 
148 // size information for layouting
149 QSizeF Trash::sizeHint (Qt::SizeHint _which, const QSizeF &/*_constraint*/) const
150 {
151  QSizeF sh;
152  switch (_which) {
153  case Qt::MinimumSize:
154  case Qt::PreferredSize:
155  case Qt::MaximumSize:
156  sh = QSizeF (pixmap ().width (), pixmap ().height ());
157  break;
158  default:
159  break;
160  }
161 
162  return sh;
163 }
164 
165 //------------------------------------------------------------------------------
166 }
void activate()
Makes the trash opaque (will be called of an element is moved above this widget)
Definition: trash.cc:124
virtual void setGeometry(const QRectF &_rect)
Sets the geometry.
Definition: trash.cc:140
Trash(GraphicsScene *_scene, QGraphicsItem *_parent)
Constructor.
Definition: trash.cc:72
void deactivate()
Makes the trash transparent (will be called of an element is moved away from this widget) ...
Definition: trash.cc:132
bool removeElement(SceneElement *_element)
Remove the element from the scene.
~Trash()
Destructor.
Definition: trash.cc:86