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#include "vibesscene2d.h"
#include <QJsonObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QtCore>
#include "vibesgraphicsitem.h"
/// Default Constructor
VibesScene2D::VibesScene2D(QObject *parent) :
QGraphicsScene(parent),
_dimX(0), _dimY(1), _nbDim(2)
{
}
/// Destructor
VibesScene2D::~VibesScene2D()
{
// All objects are removed from the scene in VibesScene2D destructor.
// This is necessary in ordrer to avoid BAD_ACCESS, since named objects call
// setItemName of the scene to unregister their name when they die. Otherwise,
// since VibesScene2D is destructed before QGraphicsScene, the hash _namedItems
// would not exist anymore when QGraphicsScene destructor would destroy the items
foreach (QGraphicsItem* item, this->items())
delete item;
}
/// Add a graphics item to the scene from its JSON "shape" object description
/// \param[in] shape The JSON object containing properties
/// \returns The item created and initialized from JSON objet. Null pointer if creation or initialization failed.
VibesGraphicsItem * VibesScene2D::addJsonShapeItem(const QJsonObject &shape)
{
// The graphics item that will be created (will be null if creation fails)
VibesGraphicsItem * item = 0;
// The group to which the item will belong (will be null if no group specified, or if group does not exist)
VibesGraphicsGroup * group = 0;
// Contruct a new object from given type string
if (shape.contains("type"))
{
QString type = shape["type"].toString();
item = VibesGraphicsItem::newWithType(type);
}
// Check if an VibesGraphicsItem has been created
if (!item)
{
return 0;
}
// Find the object parent group if specified
if (shape.contains("group"))
{
QString groupName = shape["group"].toString();
group = vibesgraphicsitem_cast<VibesGraphicsGroup*>( itemByName(groupName) );
}
// Try to initialize item with JSON
if (!item->setJson(shape, dimX(), dimY()))
{
// Cannot set item wth the provided Json, delete item
delete item;
item = 0;
}
/* else
{
// Item successufully initialized, update dimension
_nbDim = qMax(_nbDim, vibesItem->dimension());
}
*/
// If the item has successfully been created and initialized, put it on the scene
if (item)
{
this->addVibesItem(item);
// If the item belongs to a group, add it to the group
if (group)
{
group->addToGroup(item);
}
}
return item;
}
void VibesScene2D::addVibesItem(VibesGraphicsItem *item)
{
if (!item) return;
// Update scene dimension
_nbDim = qMax(_nbDim, item->dimension());
// Add item to the scene
this->addItem(vibesgraphicsitem_cast<QGraphicsItem*>(item));
// Update list of named objects
this->setItemName(item, item->name());
}
void VibesScene2D::setItemName(VibesGraphicsItem *item, QString name)
{
// If needed, unname existing item with the same name
if (VibesGraphicsItem *old_item = itemByName(name))
{
// Nothing to do if the name already points to the good item
if (old_item != item)
{
// Unname previous item
old_item->setName(QString());
}
}
// If needed, remove existing entry for the item
_namedItems.remove(_namedItems.key(item));
// Update named items list
if (!name.isEmpty())
{
_namedItems[name] = item;
}
// Update new item if needed
if (item && item->name() != name)
{
item->setName(name);
}
}
bool VibesScene2D::setDimX(int dimX)
{
if (dimX>=0 && dimX<nbDim() && dimX!=this->dimX() && dimX!=dimY())
{
_dimX = dimX;
emit changedDimX(dimX);
emit dimensionsChanged();
updateDims();
return true;
} else {
// Notify that invalid change has been refused
if (dimX != this->dimX()) { emit changedDimX(this->dimX()); emit dimensionsChanged(); }
return false;
}
}
bool VibesScene2D::setDimY(int dimY)
{
if (dimY>=0 && dimY<nbDim() && dimY!=this->dimY() && dimY!=dimX())
{
_dimY = dimY;
emit changedDimY(dimY);
emit dimensionsChanged();
updateDims();
return true;
} else {
// Notify that invalid change has been refused
if (dimY != this->dimY()) { emit changedDimY(this->dimY()); emit dimensionsChanged(); }
return false;
}
}
bool VibesScene2D::setDims(int dimX, int dimY)
{
if (dimX == this->dimX())
return setDimY(dimY);
else if (dimY == this->dimY())
return setDimX(dimX);
else if (dimY>=0 && dimY<nbDim() && dimX>=0 && dimX<nbDim() && dimX!=dimY)
{
_dimX = dimX;
_dimY = dimY;
emit changedDimX(dimX);
emit changedDimY(dimY);
emit dimensionsChanged();
updateDims();
return true;
} else {
// Notify that invalid change has been refused
if (dimX != this->dimX()) { emit changedDimX(this->dimX()); emit dimensionsChanged(); }
if (dimY != this->dimY()) { emit changedDimY(this->dimY()); emit dimensionsChanged(); }
return false;
}
}
void VibesScene2D::updateDims()
{
QList<QGraphicsItem*> children = this->items();
foreach(QGraphicsItem *item, children)
{
if (VibesGraphicsItem * vibesItem = qgraphicsitem_cast<VibesGraphicsItem*>(item))
{
if ( vibesItem->setProj(dimX(),dimY()) )
item->setVisible(true);
else
item->setVisible(false);
}
}
setSceneRect(itemsBoundingRect());
}
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