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sceneTools.cc
1 /*===========================================================================*\
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3 * OpenFlipper *
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5 * Department of Computer Graphics and Multimedia *
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40 \*===========================================================================*/
41
42 /*===========================================================================*\
43 * *
44 * $Revision$ *
45 * $LastChangedBy$ *
46 * $Date$ *
47 * *
48 \*===========================================================================*/
49
50 //== INCLUDES =================================================================
51 #include <QWidget>
52 #include <QVBoxLayout>
53 #include <QPainter>
54 #include <QGraphicsSceneMouseEvent>
55 #include <QGraphicsGridLayout>
56 #include <QGraphicsLinearLayout>
57
58 #include "sceneTools.hh"
59 #include "sceneElement.hh"
60 #include "graphicsScene.hh"
61 #include "arrow.hh"
62 #include "zoomButton.hh"
63 #include "trash.hh"
64 #include "functionDisplay.hh"
65
66 //== NAMESPACES ===============================================================
67 namespace VSI {
68
69 //=============================================================================
70 //
71 // CLASS VSI::SceneTools - IMPLEMENTATION
72 //
73 //=============================================================================
74
76 SceneTools::SceneTools (GraphicsScene *_scene) :
77 scene_ (_scene)
78 {
79 QRectF rect = scene_->sceneRect();
80
81 arrows_[0] = new Arrow (_scene, this, Arrow::North);
82 arrows_[1] = new Arrow (_scene, this, Arrow::South);
83 arrows_[2] = new Arrow (_scene, this, Arrow::East);
84 arrows_[3] = new Arrow (_scene, this, Arrow::West);
85 arrows_[4] = new Arrow (_scene, this, Arrow::Center);
86
87 QGraphicsGridLayout *aLayout = new QGraphicsGridLayout;
88 aLayout->addItem (arrows_[0], 0, 1, Qt::AlignCenter);
89 aLayout->addItem (arrows_[1], 2, 1, Qt::AlignCenter);
90 aLayout->addItem (arrows_[2], 1, 2, Qt::AlignCenter);
91 aLayout->addItem (arrows_[3], 1, 0, Qt::AlignCenter);
92 aLayout->addItem (arrows_[4], 1, 1, Qt::AlignCenter);
93
94 trash_ = new Trash (_scene, this);
95
96 QGraphicsLinearLayout *zLayout = new QGraphicsLinearLayout (Qt::Horizontal);
97 zoom_[0] = new ZoomButton (_scene, this, ZoomButton::In);
98 zoom_[1] = new ZoomButton (_scene, this, ZoomButton::Out);
99 zLayout->addItem (zoom_[0]);
100 zLayout->addItem (zoom_[1]);
101
102 fDisplay_ = new FunctionDisplay (scene_);
103 scene_->addItem (fDisplay_);
104
105 setGeometry (rect);
106 connect (scene_, SIGNAL (sceneRectChanged (const QRectF &)),
107 this, SLOT (sceneRectChanged (const QRectF &)));
108
109 QGraphicsGridLayout *mLayout = new QGraphicsGridLayout;
110
111 mLayout->addItem (aLayout, 0, 2, Qt::AlignTop | Qt::AlignRight);
112 mLayout->addItem (zLayout, 2, 0, Qt::AlignBottom | Qt::AlignLeft);
113 mLayout->addItem (trash_, 2, 2, Qt::AlignBottom | Qt::AlignRight);
114 mLayout->setColumnStretchFactor (1, 1);
115 mLayout->setRowStretchFactor (1, 1);
116 mLayout->setContentsMargins (7, 7, 7, 7);
117
118 setLayout (mLayout);
119 }
120
121 //------------------------------------------------------------------------------
122
124 SceneTools::~SceneTools ()
125 {
126 }
127
128 //------------------------------------------------------------------------------
129
130 // handle scene size changes
131 void SceneTools::sceneRectChanged (const QRectF &_rect)
132 {
133 setGeometry (_rect);
134
135 fDisplay_->setPos(_rect.topLeft ());
136 updateArrows ();
137 }
138
139 //------------------------------------------------------------------------------
140
141 // update arrow depending on visible scene rect
142 void SceneTools::updateArrows ()
143 {
144 QRectF bb = scene_->elementsBoundingRect ();
145 QRectF rect = scene_->sceneRect();
146
147 if (bb.top () < rect.top ())
148 arrows_[0]->setHighlight (true);
149 else
150 arrows_[0]->setHighlight (false);
151
152 if (bb.bottom () > rect.bottom ())
153 arrows_[1]->setHighlight (true);
154 else
155 arrows_[1]->setHighlight (false);
156
157 if (bb.right () > rect.right ())
158 arrows_[2]->setHighlight (true);
159 else
160 arrows_[2]->setHighlight (false);
161
162 if (bb.left () < rect.left ())
163 arrows_[3]->setHighlight (true);
164 else
165 arrows_[3]->setHighlight (false);
166
167 if (rect.center () != bb.center ())
168 arrows_[4]->setHighlight (true);
169 else
170 arrows_[4]->setHighlight (false);
171 }
172
173 //------------------------------------------------------------------------------
174
176 void SceneTools::mouseMove (QPointF _pos)
177 {
178 for (unsigned int i = 0; i < 5; i++)
179 {
180 if (arrows_[i]->contains (arrows_[i]->mapFromScene (_pos)))
181 arrows_[i]->activate ();
182 else
183 arrows_[i]->reset ();
184 }
185
186 for (unsigned int i = 0; i < 2; i++)
187 {
188 if (zoom_[i]->contains (zoom_[i]->mapFromScene (_pos)))
189 zoom_[i]->activate (_pos);
190 else
191 zoom_[i]->deactivate ();
192 }
193
194 if (trash_->contains (trash_->mapFromScene (_pos)))
195 trash_->activate ();
196 else
197 trash_->deactivate ();
198 }
199
200 //------------------------------------------------------------------------------
201
203 void SceneTools::mouseRelease (QPointF _pos, QGraphicsItem *_item)
204 {
205 for (unsigned int i = 0; i < 5; i++)
206 {
207 arrows_[i]->reset ();
208 }
209 for (unsigned int i = 0; i < 2; i++)
210 {
211 zoom_[i]->deactivate ();
212 }
213 trash_->deactivate ();
214
215 if (trash_->contains (trash_->mapFromScene (_pos)))
216 {
217 SceneElement *se = dynamic_cast<SceneElement *> (_item);
218 if (se && scene_->removeElement (se))
219 delete se;
220 }
221 }
222
223 //------------------------------------------------------------------------------
224 }
225
VSI
Definition: baseWidget.cc:78
VSI::GraphicsScene::removeElement
bool removeElement(SceneElement *_element)
Remove the element from the scene.
Definition: graphicsScene.cc:315
VSI::SceneTools::mouseMove
void mouseMove(QPointF _pos)
Handles mouse movement (will be called by the scene, if the mouse with a draged element is moved) ...
Definition: sceneTools.cc:176
VSI::GraphicsScene::elementsBoundingRect
QRectF elementsBoundingRect()
Bounding rectangle of all scene elements.
Definition: graphicsScene.cc:343
VSI::Trash
Definition: trash.hh:69
VSI::Trash::activate
void activate()
Makes the trash opaque (will be called of an element is moved above this widget)
Definition: trash.cc:124
VSI::Arrow::reset
void reset()
Stop the timer.
Definition: arrow.cc:256
VSI::ZoomButton::deactivate
void deactivate()
Stop the timer.
Definition: zoomButton.cc:197
VSI::SceneTools::mouseRelease
void mouseRelease(QPointF _pos, QGraphicsItem *_item)
Handles mouse release (will be called by the scene, if the element is dropped)
Definition: sceneTools.cc:203
VSI::Arrow
Scene movement widget.
Definition: arrow.hh:68
VSI::ZoomButton::activate
void activate(QPointF _pos)
Activates the timer for zoom with center at _pos (will be called if an element is moved above) ...
Definition: zoomButton.cc:186
VSI::SceneTools::~SceneTools
~SceneTools()
Destructor.
Definition: sceneTools.cc:124
VSI::GraphicsScene
Definition: graphicsScene.hh:86
VSI::SceneElement
Definition: sceneElement.hh:79
VSI::SceneTools::SceneTools
SceneTools(GraphicsScene *_scene)
Constructor.
Definition: sceneTools.cc:76
VSI::ZoomButton
Scene zoom in/out widget.
Definition: zoomButton.hh:66
VSI::Arrow::activate
void activate()
Activates the timer for movement (will be called if an element is moved above)
Definition: arrow.cc:245
VSI::Arrow::setHighlight
void setHighlight(bool _highlight)
Highlights the widget if the scene can be moved in this direction.
Definition: arrow.cc:293
VSI::FunctionDisplay
Definition: functionDisplay.hh:71
VSI::Trash::deactivate
void deactivate()
Makes the trash transparent (will be called of an element is moved away from this widget) ...
Definition: trash.cc:132