Developer Documentation
trash.cc
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41 
42 
43 
44 //== INCLUDES =================================================================
45 #include <QPixmap>
46 #include <QGraphicsItem>
47 #include <QGraphicsSceneMouseEvent>
48 
50 
51 #include "trash.hh"
52 #include "graphicsScene.hh"
53 #include "sceneElement.hh"
54 
55 //== NAMESPACES ===============================================================
56 namespace VSI {
57 
58 //=============================================================================
59 //
60 // CLASS VSI::Trash - IMPLEMENTATION
61 //
62 //=============================================================================
63 
64 
66 Trash::Trash (GraphicsScene *_scene, QGraphicsItem *_parent) :
67  QGraphicsPixmapItem (_parent),
68  scene_ (_scene)
69 {
70  setPixmap (OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"user-trash.png");
71 
72  setOpacity (0.4);
73 
74  setAcceptHoverEvents (true);
75 }
76 
77 //------------------------------------------------------------------------------
78 
81 {
82 }
83 
84 //------------------------------------------------------------------------------
85 
86 // make the trash opaque if mouse is over and we have selected elements
87 void Trash::hoverEnterEvent (QGraphicsSceneHoverEvent * /*_event*/)
88 {
89  if (!scene_->selectedItems ().isEmpty ())
90  setOpacity (1.0);
91 }
92 
93 //------------------------------------------------------------------------------
94 
95 // make trash transparent on mouse leave
96 void Trash::hoverLeaveEvent (QGraphicsSceneHoverEvent * /*_event*/)
97 {
98  setOpacity (0.4);
99 }
100 
101 //------------------------------------------------------------------------------
102 
103 // delete selected elements on mouse press
104 void Trash::mousePressEvent (QGraphicsSceneMouseEvent * /*_event*/)
105 {
106  if (!scene_->selectedItems ().isEmpty ())
107  foreach (QGraphicsItem *e, scene_->selectedItems ())
108  {
109  SceneElement *se = dynamic_cast<SceneElement *> (e);
110  if (se && scene_->removeElement (se))
111  delete se;
112  }
113 }
114 
115 //------------------------------------------------------------------------------
116 
119 {
120  setOpacity (1.0);
121 }
122 
123 //------------------------------------------------------------------------------
124 
127 {
128  setOpacity (0.4);
129 }
130 
131 //------------------------------------------------------------------------------
132 
134 void Trash::setGeometry (const QRectF &_rect)
135 {
136  QGraphicsPixmapItem::setPos (_rect.topLeft ());
137  QGraphicsLayoutItem::setGeometry (_rect);
138 }
139 
140 //------------------------------------------------------------------------------
141 
142 // size information for layouting
143 QSizeF Trash::sizeHint (Qt::SizeHint _which, const QSizeF &/*_constraint*/) const
144 {
145  QSizeF sh;
146  switch (_which) {
147  case Qt::MinimumSize:
148  case Qt::PreferredSize:
149  case Qt::MaximumSize:
150  sh = QSizeF (pixmap ().width (), pixmap ().height ());
151  break;
152  default:
153  break;
154  }
155 
156  return sh;
157 }
158 
159 //------------------------------------------------------------------------------
160 }
virtual void setGeometry(const QRectF &_rect)
Sets the geometry.
Definition: trash.cc:134
~Trash()
Destructor.
Definition: trash.cc:80
void activate()
Makes the trash opaque (will be called of an element is moved above this widget)
Definition: trash.cc:118
void deactivate()
Makes the trash transparent (will be called of an element is moved away from this widget) ...
Definition: trash.cc:126
bool removeElement(SceneElement *_element)
Remove the element from the scene.
Trash(GraphicsScene *_scene, QGraphicsItem *_parent)
Constructor.
Definition: trash.cc:66