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QgsDataItem Class Reference

Base class for all items in the model. More...

#include <qgsdataitem.h>

Inheritance diagram for QgsDataItem:
Inheritance graph
[legend]

Public Types

enum  Capability { NoCapabilities = 0, SetCrs = 1 << 0, Fertile = 1 << 1, Fast = 1 << 2 }
 
enum  State { NotPopulated, Populating, Populated }
 
enum  Type {
  Collection, Directory, Layer, Error,
  Favourites
}
 

Public Slots

virtual void childrenCreated ()
 
virtual void deleteLater ()
 Safely delete the item: More...
 
virtual void depopulate ()
 Remove children recursively and set as not populated. More...
 
void emitBeginInsertItems (QgsDataItem *parent, int first, int last)
 
void emitBeginRemoveItems (QgsDataItem *parent, int first, int last)
 
void emitDataChanged (QgsDataItem *item)
 
void emitDataChanged ()
 
void emitEndInsertItems ()
 
void emitEndRemoveItems ()
 
void emitStateChanged (QgsDataItem *item, QgsDataItem::State oldState)
 
virtual void populate ()
 
virtual void refresh ()
 
void setPopulatingIcon ()
 

Signals

void beginInsertItems (QgsDataItem *parent, int first, int last)
 
void beginRemoveItems (QgsDataItem *parent, int first, int last)
 
void dataChanged (QgsDataItem *item)
 
void endInsertItems ()
 
void endRemoveItems ()
 
void stateChanged (QgsDataItem *item, QgsDataItem::State oldState)
 

Public Member Functions

 QgsDataItem (QgsDataItem::Type type, QgsDataItem *parent, QString name, QString path)
 Create new data item. More...
 
virtual ~QgsDataItem ()
 
virtual bool acceptDrop ()
 
virtual QList< QAction * > actions ()
 
virtual void addChildItem (QgsDataItem *child, bool refresh=false)
 
virtual Q_DECL_DEPRECATED
Capability 
capabilities ()
 
virtual Capabilities capabilities2 () const
 
QVector< QgsDataItem * > children () const
 
virtual QVector< QgsDataItem * > createChildren ()
 Create children. More...
 
virtual void deleteChildItem (QgsDataItem *child)
 
virtual bool equal (const QgsDataItem *other)
 
virtual bool handleDrop (const QMimeData *, Qt::DropAction)
 
bool hasChildren ()
 
virtual QIcon icon ()
 
bool isPopulated ()
 
void moveToThread (QThread *targetThread)
 Move object and all its descendants to thread. More...
 
QString name () const
 
virtual QWidget * paramWidget ()
 
QgsDataItemparent () const
 Get item parent. More...
 
QString path () const
 
virtual QgsDataItemremoveChildItem (QgsDataItem *child)
 
int rowCount ()
 
virtual void setCapabilities (Capabilities capabilities)
 
virtual bool setCrs (QgsCoordinateReferenceSystem crs)
 
void setIcon (QIcon icon)
 
void setIconName (const QString &iconName)
 
void setParent (QgsDataItem *parent)
 Set item parent and connect / disconnect parent to / from item signals. More...
 
void setPath (const QString &path)
 
virtual void setState (State state)
 Set item state. More...
 
void setToolTip (QString msg)
 
State state () const
 
QString toolTip () const
 
Type type () const
 

Static Public Member Functions

static void deleteLater (QVector< QgsDataItem * > &items)
 
static int findItem (QVector< QgsDataItem * > items, QgsDataItem *item)
 

Protected Member Functions

bool deferredDelete ()
 The item is scheduled to be deleted. More...
 
virtual void populate (QVector< QgsDataItem * > children)
 
QIcon populatingIcon ()
 
virtual void refresh (QVector< QgsDataItem * > children)
 

Protected Attributes

Capabilities mCapabilities
 
QVector< QgsDataItem * > mChildren
 
QIcon mIcon
 
QString mIconName
 
QString mName
 
QgsDataItemmParent
 
QString mPath
 
bool mPopulated
 
State mState
 
QString mToolTip
 
Type mType
 

Static Protected Attributes

static QMap< QString, QIcon > mIconMap = QMap<QString, QIcon>()
 

Detailed Description

Base class for all items in the model.

Parent/children hierarchy is not based on QObject.

Definition at line 43 of file qgsdataitem.h.

Member Enumeration Documentation

Enumerator
NoCapabilities 
SetCrs 

Can set CRS on layer or group of layers.

Fertile 

Can create children. Even items without this capability may have children, but cannot create them, it means that children are created by item ancestors.

Fast 

createChildren() is fast enough to be run in main thread when refreshing items, most root items (wms,wfs,wcs,postgres...) are considered fast because they are reading data only from QSettings

Definition at line 110 of file qgsdataitem.h.

Enumerator
NotPopulated 

Children not yet created.

Populating 

Creating children in separate thread (populating or refreshing)

Populated 

children created

Definition at line 70 of file qgsdataitem.h.

Enumerator
Collection 
Directory 
Layer 
Error 
Favourites 

Definition at line 49 of file qgsdataitem.h.

Constructor & Destructor Documentation

QgsDataItem::QgsDataItem ( QgsDataItem::Type  type,
QgsDataItem parent,
QString  name,
QString  path 
)

Create new data item.

Definition at line 158 of file qgsdataitem.cpp.

QgsDataItem::~QgsDataItem ( )
virtual

Definition at line 173 of file qgsdataitem.cpp.

Member Function Documentation

virtual bool QgsDataItem::acceptDrop ( )
inlinevirtual

Definition at line 105 of file qgsdataitem.h.

virtual QList<QAction*> QgsDataItem::actions ( )
inlinevirtual

Definition at line 102 of file qgsdataitem.h.

void QgsDataItem::addChildItem ( QgsDataItem child,
bool  refresh = false 
)
virtual

Definition at line 489 of file qgsdataitem.cpp.

void QgsDataItem::beginInsertItems ( QgsDataItem parent,
int  first,
int  last 
)
signal
void QgsDataItem::beginRemoveItems ( QgsDataItem parent,
int  first,
int  last 
)
signal
virtual Q_DECL_DEPRECATED Capability QgsDataItem::capabilities ( )
inlinevirtual
Deprecated:
since 2.8, returned type this will changed to Capabilities

Definition at line 124 of file qgsdataitem.h.

virtual Capabilities QgsDataItem::capabilities2 ( ) const
inlinevirtual

Definition at line 126 of file qgsdataitem.h.

QVector<QgsDataItem*> QgsDataItem::children ( ) const
inline

Definition at line 144 of file qgsdataitem.h.

void QgsDataItem::childrenCreated ( )
virtualslot

Definition at line 339 of file qgsdataitem.cpp.

QVector< QgsDataItem * > QgsDataItem::createChildren ( )
virtual

Create children.

Children are not expected to have parent set. This method MUST BE THREAD SAFE.

Reimplemented in QgsZipItem, QgsFavouritesItem, and QgsDirectoryItem.

Definition at line 290 of file qgsdataitem.cpp.

void QgsDataItem::dataChanged ( QgsDataItem item)
signal
bool QgsDataItem::deferredDelete ( )
inlineprotected

The item is scheduled to be deleted.

E.g. if deleteLater() is called when item is in Populating state (createChildren() running in another thread), the deferredDelete() returns true and item will be deleted once Populating finished. Items with slow reateChildren() (for example network or database based) may check during createChildren() if deferredDelete() returns true and return from createChildren() immediately because result will be useless.

Definition at line 175 of file qgsdataitem.h.

void QgsDataItem::deleteChildItem ( QgsDataItem child)
virtual

Definition at line 522 of file qgsdataitem.cpp.

void QgsDataItem::deleteLater ( QVector< QgsDataItem * > &  items)
static

Definition at line 216 of file qgsdataitem.cpp.

void QgsDataItem::deleteLater ( )
virtualslot

Safely delete the item:

  • disconnects parent
  • unsets parent (but does not remove itself)
  • deletes all its descendants recursively
  • waits until Populating state (createChildren() in thread) finished without blocking main thread
  • calls QObject::deleteLater()

Definition at line 193 of file qgsdataitem.cpp.

void QgsDataItem::depopulate ( )
virtualslot

Remove children recursively and set as not populated.

This is used when refreshing collapsed items.

Definition at line 376 of file qgsdataitem.cpp.

void QgsDataItem::emitBeginInsertItems ( QgsDataItem parent,
int  first,
int  last 
)
slot

Definition at line 255 of file qgsdataitem.cpp.

void QgsDataItem::emitBeginRemoveItems ( QgsDataItem parent,
int  first,
int  last 
)
slot

Definition at line 263 of file qgsdataitem.cpp.

void QgsDataItem::emitDataChanged ( QgsDataItem item)
slot

Definition at line 272 of file qgsdataitem.cpp.

void QgsDataItem::emitDataChanged ( )
slot

Definition at line 277 of file qgsdataitem.cpp.

void QgsDataItem::emitEndInsertItems ( )
slot

Definition at line 259 of file qgsdataitem.cpp.

void QgsDataItem::emitEndRemoveItems ( )
slot

Definition at line 267 of file qgsdataitem.cpp.

void QgsDataItem::emitStateChanged ( QgsDataItem item,
QgsDataItem::State  oldState 
)
slot

Definition at line 282 of file qgsdataitem.cpp.

void QgsDataItem::endInsertItems ( )
signal
void QgsDataItem::endRemoveItems ( )
signal
bool QgsDataItem::equal ( const QgsDataItem other)
virtual

Reimplemented in QgsDirectoryItem, and QgsLayerItem.

Definition at line 556 of file qgsdataitem.cpp.

int QgsDataItem::findItem ( QVector< QgsDataItem * >  items,
QgsDataItem item 
)
static

Definition at line 545 of file qgsdataitem.cpp.

virtual bool QgsDataItem::handleDrop ( const QMimeData *  ,
Qt::DropAction   
)
inlinevirtual

Definition at line 108 of file qgsdataitem.h.

bool QgsDataItem::hasChildren ( )

Definition at line 460 of file qgsdataitem.cpp.

QIcon QgsDataItem::icon ( )
virtual

Reimplemented in QgsDirectoryItem.

Definition at line 241 of file qgsdataitem.cpp.

bool QgsDataItem::isPopulated ( )
inline
Deprecated:
in 2.8, use state()

Definition at line 84 of file qgsdataitem.h.

void QgsDataItem::moveToThread ( QThread *  targetThread)

Move object and all its descendants to thread.

Definition at line 227 of file qgsdataitem.cpp.

QString QgsDataItem::name ( ) const
inline

Definition at line 146 of file qgsdataitem.h.

virtual QWidget* QgsDataItem::paramWidget ( )
inlinevirtual

Reimplemented in QgsDirectoryItem.

Definition at line 99 of file qgsdataitem.h.

QgsDataItem* QgsDataItem::parent ( ) const
inline

Get item parent.

QgsDataItem maintains its own items hierarchy, it does not use QObject hierarchy.

Definition at line 140 of file qgsdataitem.h.

QString QgsDataItem::path ( ) const
inline

Definition at line 147 of file qgsdataitem.h.

void QgsDataItem::populate ( QVector< QgsDataItem * >  children)
protectedvirtual

Definition at line 362 of file qgsdataitem.cpp.

void QgsDataItem::populate ( )
virtualslot

Definition at line 295 of file qgsdataitem.cpp.

QIcon QgsDataItem::populatingIcon ( )
inlineprotected

Definition at line 168 of file qgsdataitem.h.

void QgsDataItem::refresh ( QVector< QgsDataItem * >  children)
protectedvirtual

Definition at line 412 of file qgsdataitem.cpp.

void QgsDataItem::refresh ( )
virtualslot

Definition at line 389 of file qgsdataitem.cpp.

QgsDataItem * QgsDataItem::removeChildItem ( QgsDataItem child)
virtual

Definition at line 533 of file qgsdataitem.cpp.

int QgsDataItem::rowCount ( )

Definition at line 456 of file qgsdataitem.cpp.

virtual void QgsDataItem::setCapabilities ( Capabilities  capabilities)
inlinevirtual

Definition at line 128 of file qgsdataitem.h.

virtual bool QgsDataItem::setCrs ( QgsCoordinateReferenceSystem  crs)
inlinevirtual

Definition at line 120 of file qgsdataitem.h.

void QgsDataItem::setIcon ( QIcon  icon)
inline

Definition at line 153 of file qgsdataitem.h.

void QgsDataItem::setIconName ( const QString &  iconName)
inline

Definition at line 154 of file qgsdataitem.h.

void QgsDataItem::setParent ( QgsDataItem parent)

Set item parent and connect / disconnect parent to / from item signals.

It does not add itself to parents children (mChildren)

Definition at line 465 of file qgsdataitem.cpp.

void QgsDataItem::setPath ( const QString &  path)
inline

Definition at line 148 of file qgsdataitem.h.

void QgsDataItem::setPopulatingIcon ( )
slot

Definition at line 566 of file qgsdataitem.cpp.

void QgsDataItem::setState ( State  state)
virtual

Set item state.

It also take care about starting/stopping loading icon animation.

Parameters
state

Reimplemented in QgsDirectoryItem.

Definition at line 580 of file qgsdataitem.cpp.

void QgsDataItem::setToolTip ( QString  msg)
inline

Definition at line 156 of file qgsdataitem.h.

QgsDataItem::State QgsDataItem::state ( ) const

Definition at line 571 of file qgsdataitem.cpp.

void QgsDataItem::stateChanged ( QgsDataItem item,
QgsDataItem::State  oldState 
)
signal
QString QgsDataItem::toolTip ( ) const
inline

Definition at line 157 of file qgsdataitem.h.

Type QgsDataItem::type ( ) const
inline

Definition at line 137 of file qgsdataitem.h.

Member Data Documentation

Capabilities QgsDataItem::mCapabilities
protected

Definition at line 178 of file qgsdataitem.h.

QVector<QgsDataItem*> QgsDataItem::mChildren
protected

Definition at line 180 of file qgsdataitem.h.

QIcon QgsDataItem::mIcon
protected

Definition at line 192 of file qgsdataitem.h.

QMap< QString, QIcon > QgsDataItem::mIconMap = QMap<QString, QIcon>()
staticprotected

Definition at line 193 of file qgsdataitem.h.

QString QgsDataItem::mIconName
protected

Definition at line 191 of file qgsdataitem.h.

QString QgsDataItem::mName
protected

Definition at line 184 of file qgsdataitem.h.

QgsDataItem* QgsDataItem::mParent
protected

Definition at line 179 of file qgsdataitem.h.

QString QgsDataItem::mPath
protected

Definition at line 189 of file qgsdataitem.h.

bool QgsDataItem::mPopulated
protected
Deprecated:
since 2.8, use mState

Definition at line 183 of file qgsdataitem.h.

State QgsDataItem::mState
protected

Definition at line 181 of file qgsdataitem.h.

QString QgsDataItem::mToolTip
protected

Definition at line 190 of file qgsdataitem.h.

Type QgsDataItem::mType
protected

Definition at line 177 of file qgsdataitem.h.


The documentation for this class was generated from the following files: