QT类继承图（转自：http://blog.163.com/sxs_solo/blog/static/263333820086410169909/）
对于嵌入式设备几个关键对象：
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键盘
QShared
|---QGLayoutIterator
| |---QLayoutArrayIterator
| |---QBoxLayoutIterator
| |---QToolLayoutIterator
| |---QMainWindowLayoutIterator
|---QBrushData
|---QDOM_ImplementationPrivate
|---QDOM_NodePrivate
| |---QDOM_DocumentTypePrivate
| |---QDOM_DocumentFragmentPrivate
| |---QDOM_CharacterDataPrivate
| | |---QDOM_TextPrivate
| | | |---QDOM_CDATASectionPrivate
| | |---QDOM_CommentPrivate
| |---QDOM_AttrPrivate
| |---QDOM_ElementPrivate
| |---QDOM_NotationPrivate
| |---QDOM_EntityPrivate
| |---QDOM_EntityReferencePrivate
| |---QDOM_ProcessingInstructionPrivate
| |---QDOM_DocumentPrivate
|---QDOM_NodeListPrivate
|---QDOM_NamedNodeMapPrivate
|---QFontData
|---array_data
|---QGuardedPtrPrivate
|---QImageData
|---QMapPrivateBase
| |---QMapPrivate
|---QMemoryManagerFont
|---QSMCacheItem
|---QPalData
|---QPenData
|---QPixmapData
|---QRegionData
|---QTextCharFormat
|---QTextCustomItem
| |---QTextHorizontalLine
| |---QTextLineBreak
| |---QTextImage
| |---QTextTable
|---QSmartPtrPrivate
|---QStringData
|---QValueListPrivate
|---QVariantPrivate
|---QCursorData
|---QIconSetPrivate
|---WhatsThisItem
QLayoutItem
|---QSpacerItem
|---QWidgetItem
|---QLayout
|---QTextTableCell
QGArray
|---QArray
| |---QPointArray
QGCacheIterator
|---QAsciiCacheIterator
|---QCacheIterator
|---QIntCacheIterator
QGDictIterator
|---QAsciiDictIterator
| |---QSignalDictIt
|---QDictIterator
|---QIntDictIterator
| |---QWidgetIntDictIt
|---QPtrDictIterator
QAsyncIO
|---QDataSink
|---QDataSource
| |---QIODeviceSource
QTextDecoder
|---QBig5Decoder
|---QEucJpDecoder
|---QEucKrDecoder
|---QGbkDecoder
|---QJisDecoder
|---QSjisDecoder
|---QTextStatelessDecoder
|---QTextCodecFromIODDecoder
|---QUtf8Decoder
|---QUtf16Decoder
QTextCodec
|---QBig5Codec
|---QEucJpCodec
|---QEucKrCodec
|---QGbkCodec
|---QJisCodec
|---QKoi8Codec
|---QHebrewCodec
| |---QArabicCodec
|---QSjisCodec
|---QWindowsLocalCodec
|---QTextCodecFromIOD
|---QSimpleTextCodec
|---QLatin1Codec
|---QTsciiCodec
|---QUtf8Codec
|---QUtf16Codec
QByteArray
|---QBitArray
|---QCString
Qt
|---QBrush
|---QCanvasItem
| |---QCanvasSprite
| |---QCanvasPolygonalItem
| | |---QCanvasRectangle
| | |---QCanvasPolygon
| | |---QCanvasLine
| | |---QCanvasEllipse
| |---QCanvasText
|---QEvent
| |---QTimerEvent
| |---QMouseEvent
| |---QWheelEvent
| |---QKeyEvent
| |---QFocusEvent
| |---QPaintEvent
| |---QMoveEvent
| |---QResizeEvent
| |---QCloseEvent
| |---QShowEvent
| |---QHideEvent
| |---QIMEvent
| | |---QIMComposeEvent
| |---QDragResponseEvent
| |---QDragLeaveEvent
| |---QChildEvent
| |---QCustomEvent
| |---QDropEvent
| |---QDragMoveEvent
| | |---QDragEnterEvent
|---QGfx//抽象对屏幕具体操作接口
| |---QGfxRasterBase
| | |---QGfxRaster
| | | |---QGfxSNAP
| | | |---QGfxVFb
| | |---QDirectPainterGfx
|---QIconViewItem
|---QListViewItem
| |---File
| |---QCheckListItem
| |---Root
|---QCustomMenuItem
| |---QTearOffMenuItem
|---QObject
| |---QLayout
| | |---QGridLayout
| | |---QToolLayout
| | |---QMainWindowLayout
| | |---QBoxLayout
| | | |---QHBoxLayout
| | | |---QVBoxLayout
| |---QAccel
| |---QAction
| | |---QActionGroup
| |---QApplication
| |---QDataPump
| |---QCanvas
| |---QClipboard
| |---QColorDialogPrivate
| |---QCopChannel
| |---QDns
| | |---QDnsUgleHack
| |---QDnsSocket
| | |---QDnsManager
| |---QDragObject
| | |---QStoredDrag
| |---QDragManager
| |---QFileIconProvider
| | |---QWindowsIconProvider
| |---QGuardedPtrPrivate
| |---QWSKeyboardHandler
| | |---QWSyopyButtonsHandler
| | |---QWSVr41xxButtonsHandler
| | |---QWSVFbKeyboardHandler
| | |---QWSPC101KeyboardHandler
| | | |---QWSTtyKeyboardHandler
| | | |---QWSUsbKeyboardHandler
| |---QLibraryPrivate
| |---QNetworkProtocol
| | |---QFtp
| | |---QLocalFs
| |---QNetworkOperation
| |---QNPInstance
| |---QSenderObject
| |---QServerSocket
| | |---QVNCServer
| | |---QWSServerSocket
| | | |---QWSSoundServerSocket
| | | |---QWSServer
| |---QSessionManager
| |---QSignalMapper
| |---QSocket
| | |---QWSSocket
| | | |---QWSSoundClient
| | | |---QWSSoundServerClient
| |---QSocketNotifier
| |---QSound
| |---QAuServer
| |---QWSSoundServer
| |---QWSServer
| | |---QAuServerQWS
| |---QStyleSheet
| |---QToolTipGroup
| |---QTranslator
| |---QUrlOperator
| |---QWSInputMethod
| |---QWSClient
| |---QWSManager
| |---QWSServerSignalBridge
| |---QFrameEventHandler
| |---QMovieFilePrivate
| |---QWSSoundServerData
| |---QThreadPostEventPrivate
| |---QSingleShotTimer
| |---QTipManager
| |---QWhatsThisPrivate
| |---QWSMouseHandler
| | |---QAutoMouseHandler
| | |---QWSMouseHandlerPrivate
| | |---QYopyTPanelHandlerPrivate
| | |---QCustomTPanelHandlerPrivate
| | |---QVFbMouseHandlerPrivate
| | |---QWSMouseHandlerPrivate
| | |---QCalibratedMouseHandler
| | | |---QVrTPanelHandlerPrivate
| | | |---QTPanelHandlerPrivate
| | | |---QTSLibHandlerPrivate
| | | |---QPPTPanelHandlerPrivate
| |---QValidator
| | |---QDoubleValidator
| | |---QIntValidator
| | | |---QColIntValidator
| |---QTimer
| | |---QDnsQuery
| |---QStyle
| | |---QCommonStyle
| | | |---QWindowsStyle
| | | | |---QCompactStyle
| | | | |---QPlatinumStyle
| | | |---QMotifStyle
| | | | |---QCDEStyle
| | | | |---QInterlaceStyle
| | | | |---QMotifPlusStyle
| | | | |---QSGIStyle
| |---QWidget
| | |---QButton
| | | |---QCheckBox
| | | |---QPushButton
| | | |---QRadioButton
| | | |---QToolButton
| | | | |---QWhatsThisButton
| | |---QColorLuminancePicker
| | |---QColorShower
| | |---QComboBox
| | |---QDial
| | |---QDialog
| | | |---QColorDialog
| | | |---QFileDialog
| | | |---QFontDialog
| | | |---QInputDialog
| | | |---QMessageBox
| | | |---QPrintDialog
| | | |---QTabDialog
| | | |---QWizard
| | |---QFDProgressAnimation
| | |---QFrame
| | | |---QColorPicker
| | | |---QColorShowLabel
| | | |---QWidgetStack
| | | |---QGrid
| | | |---QGroupBox
| | | | |---QButtonGroup
| | | | | |---QHButtonGroup
| | | | | |---QVButtonGroup
| | | | |---QHGroupBox
| | | | |---QVGroupBox
| | | |---QHBox
| | | | |---QVBox
| | | |---QLabel
| | | | |---QWorkspaceChildTitleButton
| | | | |---QTipLabel
| | | |---QLCDNumber
| | | |---QMenuBar
| | | |---QSpinBox
| | | |---QPopupMenu
| | | | |---QComboBoxPopup
| | | |---QProgressBar
| | | |---QSplitter
| | | |---QWorkspaceChildTitleLabel
| | | |---QWorkspaceChild
| | | |---QToolBarSeparator
| | | |---QTableView
| | | | |---QWellArray
| | | | | |---QColorWell
| | | | |---QMultiLineEdit
| | | | | |---QIconViewItemLineEdit
| | | |---QScrollView
| | | |---QCanvasView
| | | |---QIconView
| | | |---QListBox
| | | | |---QFileListBox
| | | |---QListView
| | | | |---QFileListView
| | | |---QTable
| | | |---QTextView
| | | | |---QTextBrowser
| | |---QGLWidget
| | |---QHeader
| | | |---QTableHeader
| | |---QLineEdit
| | | |---QColNumLineEdit
| | | |---QRenameEdit
| | |---QMainWindow
| | |---QNPWidget
| | |---QScrollBar
| | |---QSemiModal
| | | |---QFDProgressDialog
| | | |---QProgressDialog
| | |---QSizeGrip
| | |---QSlider
| | |---QStatusBar
| | |---QTabBar
| | |---QTabWidget
| | |---QToolBar
| | |---QWorkspaceChildTitleBar
| | |---QWorkspace
| | |---QETWidget
| | |---QShapedPixmapWidget
| | |---QAccessWidget
| | |---QAlphaWidget
| | |---QHideDock
| | |---QClipperWidget
| | |---QSplitterHandle
| | |---QCornerSquare
| | |---QTextDetailPopup
| | |---QArrowWidget
| | |---QFocusDataAccessor
| | |---Invisible
|---QPainter
| |---QDirectPainter
|---QPen
|---QPixmap
|---QStyleSheetItem
|---QTableItem
|---QMutex
|---QThread
|---QWaitCondition
|---QSemaphore
|---QToolTip
| |---QIconViewToolTip
| |---QHideToolTip
|---QWhatsThis
|---QWSSoundServer
|---QWSCursor
|---QDialogPrivate
QIODevice
|---QBuffer
|---QFile
|---QSocket
|---QSocketDevice
|---QStringBuffer
QPolygonScanner
|---QCanvasPolygonScanner
|---QGfxRaster
QValueList
|---QCanvasItemList
|---TrieList
|---QStringList
|---QValueStack
QUnknownInterface
|---QLibraryInterface
QDataStream
|---QCopEnvelope
QRangeControl
|---QDial
|---QScrollBar
|---QSlider
|---QSpinBox
QXmlDefaultHandler
|---QDomHandler
QDomNode
|---QDomDocumentType
|---QDomDocument
|---QDomDocumentFragment
|---QDomCharacterData
| |---QDomText
| | |---QDomCDATASection
| |---QDomComment
|---QDomAttr
|---QDomElement
|---QDomNotation
|---QDomEntity
|---QDomEntityReference
|---QDomProcessingInstruction
QMimeSource
|---QDragObject
| |---QStoredDrag
| | |---QUriDrag
| | |---QColorDrag
| |---QTextDrag
| |---QImageDrag
| |---QIconDrag
QEvent,QMimeSource(双继承)
|---QDropEvent
| |---QDragMoveEvent
| | |---QDragEnterEvent
QListBoxItem
|---MCItem
|---QListBoxText
|---QListBoxPixmap
QFontFactory
|---QFontFactoryBDF
|---QFontFactoryFT
QDiskFontPrivate
|---QDiskFontFT
QRenderedFont
|---QRenderedFontFT
|---QRenderedFontBDF
QCollection
|---QGCache
| |---QIntCache
| |---QAsciiCache
| |---QCache
| | |---QFontCache
| | |---QPMCache
|---QGDict
| |---QDict
| |---QCDict
| |---QPtrDict
| |---QIntDict
| | |---QWidgetIntDict
| | | |---QWidgetMapper
| |---QAsciiDict
| |---QObjectDictionary
| |---QSignalDict
| |---QMemberDict
|---QGList
| |---QList
| | |---UrlInfoList
| | |---QGDItList
| | |---QObjectList
| | |---QConnectionList
| | |---QSortedList
| | |---QWidgetList
| | |---QButtonList
|---QGVector
| |---QVector
QBaseBucket
|---QStringBucket
|---QAsciiBucket
|---QIntBucket
|---QPtrBucket
QScreen//显示设备基类,包含显示设备基本描述和操作方式
|---QLinuxFbScreen
|---QSNAPScreen
|---QVFbScreen
QImageFormat
|---QGIFFormat
|---QMNGFormat
|---QPNGFormat
QImageFormatType
|---QGIFFormatType
|---QMNGFormatType
|---QPNGFormatType
QGL
|---QGLFormat
|---QGLContext
|---QGLWidget
QJpUnicodeConv
|---QJpUnicodeConv_Unicode_JISX0201
|---QJpUnicodeConv_Unicode_ASCII
|---QJpUnicodeConv_JISX0221_JISX0201
|---QJpUnicodeConv_JISX0221_ASCII
|---QJpUnicodeConv_Sun
|---QJpUnicodeConv_Microsoft
QGListIterator
|---QListIterator
| |---QObjectListIt
| |---QConnectionListIt
| |---QCListIt
| |---QWidgetListIt
QMapNodeBase
|---QMapNode
QMenuData
|---QMenuBar
|---QPopupMenu
QNetworkProtocolFactoryBase
|---QNetworkProtocolFactory
QPaintDevice
|---QPicture
|---QPixmap
| |---QBitmap
| |---QCanvasPixmap
| |---QwsPixmap
|---QPrinter
|---QPSPrinter
|---QWidget
QPNGImageWriter
|---QPNGImagePacker
QTextParagraph
|---QRichText
QStrListBase
|---QStrList
| |---QStrIList
QStrVec
|---QStrVec
| |---QStrIVec
QTextEncoder
|---QTextStatelessEncoder
|---QUtf16Encoder
QTextStream
|---QTextIStream
|---QTextOStream
QMutexPrivate
|---QRMutexPrivate
QUrl
|---QUrlOperator
QWSCommand
|---QWSIdentifyCommand
|---QWSCreateCommand
|---QWSRegionNameCommand
|---QWSRegionCommand
|---QWSRegionMoveCommand
|---QWSRegionDestroyCommand
|---QWSChangeAltitudeCommand
|---QWSRequestFocusCommand
|---QWSAddPropertyCommand
|---QWSSetPropertyCommand
|---QWSRemovePropertyCommand
|---QWSGetPropertyCommand
|---QWSSetSelectionOwnerCommand
|---QWSConvertSelectionCommand
|---QWSDefineCursorCommand
|---QWSSelectCursorCommand
|---QWSGrabMouseCommand
|---QWSGrabKeyboardCommand
|---QWSPlaySoundCommand
|---QWSQCopRegisterChannelCommand
|---QWSQCopSendCommand
|---QWSSetIMInfoCommand
|---QWSIMMouseCommand
|---QWSResetIMCommand
|---QWSSetIMFontCommand
QWSDecoration
|---QWSDefaultDecoration
| |---QWSHydroDecoration
| |---QWSKDE2Decoration
| |---QWSKDEDecoration
| |---QWSWindowsDecoration
| |---QWSBeOSDecoration
QAutoMouseSubHandler
|---QAutoMouseSubHandler_intellimouse
|---QAutoMouseSubHandler_serial
| |---QAutoMouseSubHandler_mousesystems
| |---QAutoMouseSubHandler_ms
|---QAutoMouseSubHandler_intellimouse
QXmlReader
|---QXmlSimpleReader
QEffects
|---QAlphaWidget
|---QRollEffect
QString
|---QCIString
QFont
|---QFont_Private
QScreenCursor
|---QVFbScreenCursor
QImageConsumer
|---QImageIOFrameGrabber
QMultiLineEditCommand
|---QBeginCommand
|---QEndCommand
|---QDelTextCmd
| |---QInsTextCmd
QPSPrinterFontPrivate
|---QPSPrinterFontTTF
|---QPSPrinterFontPFA
|---QPSPrinterFontPFB
|---QPSPrinterFontNotFound
|---QPSPrinterFontAsian
| |---QPSPrinterFontJapanese
| |---QPSPrinterFontKorean
| |---QPSPrinterFontTraditionalChinese
| |---QPSPrinterFontSimplifiedChinese
QWSSoundServerProvider
|---QWSSoundServerBucket
|---QWSSoundServerStream