QT6 源（106）：阅读与注释重要的基类控件 QWidget，这是其精简版，完整注释版为篇 37

（1）原篇幅 37 为最开始整理，整理的不是太完善。重点不突出。故重新整理，但删除了大量的注释，重在突出本 QWidget类的内部逻辑，更易观察其包含了哪些内容。至于不理解的成员函数与属性，内容已不太多了，查阅官方注释即可。
这是篇 37 的超文本链接，那里的注释较完整些
（2）

#ifndef QWIDGET_H
#define QWIDGET_H#include <QtWidgets/qtwidgetsglobal.h>
#include <QtGui/qwindowdefs.h>
#include <QtCore/qobject.h>
#include <QtCore/qmargins.h>
#include <QtGui/qpaintdevice.h>
#include <QtGui/qpalette.h>
#include <QtGui/qfont.h>
#include <QtGui/qfontmetrics.h>
#include <QtGui/qfontinfo.h>
#include <QtWidgets/qsizepolicy.h>
#include <QtGui/qregion.h>
#include <QtGui/qbrush.h>
#include <QtGui/qcursor.h>
#  include <QtGui/qkeysequence.h>#ifdef QT_INCLUDE_COMPAT
#include <QtGui/qevent.h>
#endifQT_BEGIN_NAMESPACEclass QLayout;
class QStyle;
class QAction;
class QVariant;
class QWindow;
class QActionEvent;
class QMouseEvent;
class QWheelEvent;
class QHoverEvent;
class QKeyEvent;
class QEnterEvent;
class QFocusEvent;
class QPaintEvent;
class QMoveEvent;
class QResizeEvent;
class QCloseEvent;
class QContextMenuEvent;
class QInputMethodEvent;
class QTabletEvent;
class QDragEnterEvent;
class QDragMoveEvent;
class QDragLeaveEvent;
class QDropEvent;
class QScreen;
class QShowEvent;
class QHideEvent;
class QIcon;
class QBackingStore;
class QPlatformWindow;
class QLocale;
class QGraphicsProxyWidget;
class QGraphicsEffect;
class QRasterWindowSurface;
class QUnifiedToolbarSurface;
class QPixmap;
class QDebug;template <>  //至此，该类型转换函数支持了对到 QWidget * 指针类型的准还
inline       QWidget * qobject_cast<      QWidget *>(      QObject * o)
{if (!o || !o->isWidgetType()) return nullptr;return static_cast<QWidget*>(o);  //可见，核心还是 c++ 的静态类型转换
}template <>
inline const QWidget * qobject_cast<const QWidget *>(const QObject * o)
{if (!o || !o->isWidgetType()) return nullptr;return static_cast<const QWidget*>(o);
}#define QWIDGETSIZE_MAX ((1<<24)-1)//说明本指针类型可以交给 QDebug 输出来调试
Q_WIDGETS_EXPORT QDebug operator<<(QDebug, const QWidget *);class QWidgetData
{
public:WId winid;uint widget_attributes;Qt::WindowFlags window_flags;uint window_state : 4;uint focus_policy : 4;uint sizehint_forced :1;uint is_closing :1;uint in_show : 1;uint in_set_window_state : 1;mutable uint fstrut_dirty : 1;uint context_menu_policy : 3;uint window_modality : 2;uint in_destructor : 1;uint unused : 13;QRect crect;mutable QPalette pal;QFont fnt;QRect wrect;
};class QWidgetPrivate;class Q_WIDGETS_EXPORT QWidget : public QObject, public QPaintDevice
{Q_OBJECTQ_DECLARE_PRIVATE(QWidget)Q_PROPERTY(QString     windowTitle    //先文本量，再布尔量，再其它，再数字量READ       windowTitle      WRITE     setWindowTitleNOTIFY     windowTitleChanged)Q_PROPERTY(QIcon       windowIconREAD       windowIcon       WRITE     setWindowIconNOTIFY     windowIconChanged)Q_PROPERTY(QString     windowIconTextREAD       windowIconText   WRITE     setWindowIconTextNOTIFY     windowIconTextChanged) // deprecated 废弃Q_PROPERTY(QString     toolTipREAD       toolTip          WRITE     setToolTip)Q_PROPERTY(int         toolTipDurationREAD       toolTipDuration  WRITE     setToolTipDuration)Q_PROPERTY(QString     statusTipREAD       statusTip        WRITE     setStatusTip)Q_PROPERTY(QString     whatsThisREAD       whatsThis        WRITE     setWhatsThis)Q_PROPERTY(QString     accessibleNameREAD       accessibleName   WRITE     setAccessibleName)Q_PROPERTY(QString     accessibleDescriptionREAD       accessibleDescriptionWRITE   setAccessibleDescription)Q_PROPERTY(QString     styleSheetREAD       styleSheet       WRITE     setStyleSheet)Q_PROPERTY(QLocale     localeREAD       locale           WRITE     setLocaleRESET      unsetLocale)Q_PROPERTY(QString     windowFilePathREAD       windowFilePath   WRITE     setWindowFilePath)Q_PROPERTY(bool               enabledREAD            isEnabled   WRITE     setEnabled)Q_PROPERTY(bool        updatesEnabledREAD       updatesEnabled   WRITE     setUpdatesEnabledDESIGNABLE        false)Q_PROPERTY(bool        focus            READ      hasFocus)Q_PROPERTY(bool        modal            READ      isModal)Q_PROPERTY(Qt::WindowModality      windowModalityREAD                   windowModalityWRITE               setWindowModality)Q_PROPERTY(bool        mouseTrackingREAD    hasMouseTracking    WRITE      setMouseTracking)Q_PROPERTY(bool       tabletTrackingREAD   hasTabletTracking    WRITE      setTabletTracking)Q_PROPERTY(bool       isActiveWindow    READ       isActiveWindow)Q_PROPERTY(bool         visibleREAD      isVisible         WRITE      setVisibleDESIGNABLE    false)Q_PROPERTY(bool        minimized        READ       isMinimized)Q_PROPERTY(bool        maximized        READ       isMaximized)Q_PROPERTY(bool        fullScreen       READ       isFullScreen)Q_PROPERTY(bool        acceptDropsREAD       acceptDrops      WRITE      setAcceptDrops)Q_PROPERTY(bool        windowModifiedREAD     isWindowModified   WRITE      setWindowModified)Q_PROPERTY(bool        autoFillBackgroundREAD       autoFillBackgroundWRITE   setAutoFillBackground)QDOC_PROPERTY(Qt::WindowFlags    windowFlagsREAD                 windowFlagsWRITE             setWindowFlags)Q_PROPERTY(QPalette    paletteREAD       palette         WRITE      setPalette)Q_PROPERTY(QFont       fontREAD       font            WRITE      setFont)Q_PROPERTY(QCursor     cursorREAD       cursor          WRITE      setCursorRESET unsetCursor)Q_PROPERTY(Qt::FocusPolicy                 focusPolicyREAD                           focusPolicyWRITE                       setFocusPolicy)Q_PROPERTY(QSizePolicy                      sizePolicyREAD                            sizePolicyWRITE                        setSizePolicy)Q_PROPERTY(Qt::ContextMenuPolicy     contextMenuPolicyREAD                     contextMenuPolicyWRITE                 setContextMenuPolicy)Q_PROPERTY(Qt::LayoutDirection       layoutDirectionREAD                     layoutDirectionWRITE                 setLayoutDirectionRESET               unsetLayoutDirection)Q_PROPERTY(Qt::InputMethodHints      inputMethodHintsREAD                     inputMethodHintsWRITE                 setInputMethodHints)Q_PROPERTY(QRect           geometryREAD           geometry      WRITE      setGeometry)Q_PROPERTY(QRect      frameGeometry      READ     frameGeometry)Q_PROPERTY(QRect     normalGeometry      READ    normalGeometry)Q_PROPERTY(QRect               rect      READ              rect)Q_PROPERTY(QRect       childrenRect      READ      childrenRect)Q_PROPERTY(QRegion     childrenRegion    READ      childrenRegion)Q_PROPERTY(QSize         frameSize       READ      frameSize)Q_PROPERTY(QSize              sizeREAD              size       WRITE        resizeDESIGNABLE        false      STORED       false)Q_PROPERTY(QSize              sizeHint    READ       sizeHint)Q_PROPERTY(QSize              sizeIncrementREAD              sizeIncrementWRITE          setSizeIncrement)Q_PROPERTY(QSize          baseSizeREAD          baseSize        WRITE      setBaseSize)Q_PROPERTY(QSize       minimumSizeHintREAD       minimumSizeHint)Q_PROPERTY(QSize       minimumSizeREAD       minimumSize        WRITE      setMinimumSize)Q_PROPERTY(QSize       maximumSizeREAD       maximumSize        WRITE      setMaximumSize)Q_PROPERTY(int         minimumWidthREAD       minimumWidth       WRITE      setMinimumWidthSTORED           falseDESIGNABLE       false)Q_PROPERTY(int         minimumHeightREAD       minimumHeight      WRITE      setMinimumHeightSTORED           falseDESIGNABLE       false)Q_PROPERTY(int         maximumWidthREAD       maximumWidth       WRITE      setMaximumWidthSTORED           falseDESIGNABLE       false)Q_PROPERTY(int         maximumHeightREAD       maximumHeight      WRITE      setMaximumHeightSTORED           falseDESIGNABLE       false)Q_PROPERTY(int   width    READ   width)Q_PROPERTY(int   height   READ   height)Q_PROPERTY(int   x        READ    x)Q_PROPERTY(int   y        READ    y)Q_PROPERTY(QPoint   posREAD    pos   WRITE   moveDESIGNABLE   false    STORED   false)Q_PROPERTY(double      windowOpacityREAD       windowOpacity    WRITE    setWindowOpacity)private:void setBackingStore(QBackingStore *store);bool testAttribute_helper(Qt::WidgetAttribute) const;QLayout *takeLayout();friend class QBackingStoreDevice;friend class QWidgetRepaintManager;friend class QApplication;friend class QApplicationPrivate;friend class QGuiApplication;friend class QGuiApplicationPrivate;friend class QBaseApplication;friend class QPainter;friend class QPainterPrivate;friend class QPixmap; // for QPixmap::fill()friend class QFontMetrics;friend class QFontInfo;friend class QLayout;friend class QWidgetItem;friend class QWidgetItemV2;friend class QX11PaintEngine;friend class QWin32PaintEngine;friend class QShortcutPrivate;friend class QWindowSurface;friend class QGraphicsProxyWidget;friend class QGraphicsProxyWidgetPrivate;friend class QStyleSheetStyle;friend struct QWidgetExceptionCleaner;friend class QWidgetWindow;friend class QAccessibleWidget;friend class QAccessibleTable;friend class QAccessibleTabButton;friend class QGestureManager;friend class QWinNativePanGestureRecognizer;friend class QWidgetEffectSourcePrivate;friend Q_WIDGETS_EXPORT QWidgetData *qt_qwidget_data(QWidget *widget);friend Q_WIDGETS_EXPORT QWidgetPrivate *qt_widget_private(QWidget *widget);private:Q_DISABLE_COPY(QWidget)Q_PRIVATE_SLOT(d_func(), void _q_showIfNotHidden())Q_PRIVATE_SLOT(d_func(), QWindow *_q_closestWindowHandle())QWidgetData * data;protected:QWidget(QWidgetPrivate & d, QWidget * parent, Qt::WindowFlags f);public:enum RenderFlag {DrawWindowBackground = 0x1,DrawChildren = 0x2,IgnoreMask = 0x4};Q_DECLARE_FLAGS(RenderFlags, RenderFlag)explicit QWidget(QWidget * parent = nullptr,Qt::WindowFlags f = Qt::WindowFlags());~QWidget();// Q_PROPERTY(QString     windowTitle    //先文本量，再布尔量，再其它，再数字量
//             READ       windowTitle      WRITE     setWindowTitle
//             NOTIFY     windowTitleChanged)QString     windowTitle() const;
public Q_SLOTS :void     setWindowTitle(const QString &);
Q_SIGNALS:void        windowTitleChanged(const QString & title);public:
// Q_PROPERTY(QIcon       windowIcon
//             READ       windowIcon       WRITE     setWindowIcon
//             NOTIFY     windowIconChanged)QIcon       windowIcon() const;void     setWindowIcon(       const QIcon & icon);
Q_SIGNALS :void        windowIconChanged(const QIcon & icon);public:
// Q_PROPERTY(QString     windowIconText
//             READ       windowIconText   WRITE     setWindowIconText
//             NOTIFY     windowIconTextChanged) // deprecated 废弃QString     windowIconText() const;void     setWindowIconText(const QString &);
Q_SIGNALS :void        windowIconTextChanged(const QString & iconText);public:
// Q_PROPERTY(QString     toolTip
//             READ       toolTip          WRITE     setToolTip)QString     toolTip() const;void     setToolTip(const QString &);// Q_PROPERTY(int         toolTipDuration
//             READ       toolTipDuration  WRITE     setToolTipDuration)int         toolTipDuration() const;void     setToolTipDuration(int msec);// Q_PROPERTY(QString     statusTip
//             READ       statusTip        WRITE     setStatusTip)QString     statusTip() const;void    setStatusTip(const QString &);// Q_PROPERTY(QString     whatsThis
//             READ       whatsThis        WRITE     setWhatsThis)QString     whatsThis() const;void    setWhatsThis(const QString &);// Q_PROPERTY(QString     accessibleName
//             READ       accessibleName   WRITE     setAccessibleName)QString    accessibleName() const;void    setAccessibleName(const QString & name);// Q_PROPERTY(QString     accessibleDescription
//             READ       accessibleDescription
//             WRITE   setAccessibleDescription)QString     accessibleDescription() const;void    setAccessibleDescription(const QString & description);// Q_PROPERTY(QString     styleSheet
//             READ       styleSheet       WRITE     setStyleSheet)QString     styleSheet() const;
public Q_SLOTS :void    setStyleSheet(const QString & styleSheet);public:
// Q_PROPERTY(QLocale     locale
//             READ       locale           WRITE     setLocale
//            RESET  unsetLocale)QLocale     locale() const;void    setLocale(const QLocale & locale);void  unsetLocale();// Q_PROPERTY(QString     windowFilePath
//             READ       windowFilePath   WRITE     setWindowFilePath)QString     windowFilePath() const;void    setWindowFilePath(const QString & filePath);// Q_PROPERTY(bool               enabled
//             READ            isEnabled   WRITE     setEnabled)bool            isEnabled  () const;bool            isEnabledTo(const QWidget *) const;
public Q_SLOTS :void           setEnabled  (bool);void           setDisabled (bool);public:
// Q_PROPERTY(bool        updatesEnabled
//            READ        updatesEnabled   WRITE     setUpdatesEnabled
//            DESIGNABLE        false)inline    bool        updatesEnabled() const;void     setUpdatesEnabled(bool enable);// Q_PROPERTY(bool        focus            READ      hasFocus) //后面还有属性 focusPolicybool     hasFocus() const;
public Q_SLOTS :inline    void     setFocus() { setFocus(Qt::OtherFocusReason); }
public:void               setFocus(Qt::FocusReason reason);void             clearFocus();// Q_PROPERTY(bool        mouseTracking    //鼠标跟踪
//            READ     hasMouseTracking    WRITE      setMouseTracking)bool     hasMouseTracking() const;void     setMouseTracking(bool enable);// Q_PROPERTY(bool       tabletTracking    //触摸屏跟踪
//            READ    hasTabletTracking    WRITE      setTabletTracking)bool    hasTabletTracking() const;void    setTabletTracking(bool enable);// Q_PROPERTY(bool       isActiveWindow    READ       isActiveWindow)bool       isActiveWindow() const;// Q_PROPERTY(bool         visible
//            READ       isVisible         WRITE      setVisible
//            DESIGNABLE     false)bool       isVisible  () const;bool       isVisibleTo(const QWidget *) const;inline    bool       isHidden   () const;
public Q_SLOTS :virtual   void      setVisible  (bool visible);void      setHidden   (bool hidden );void         show ();void         hide ();bool         close();public:
// Q_PROPERTY(bool        minimized        READ       isMinimized)bool      isMinimized() const;
public Q_SLOTS :void    showMinimized();public:
// Q_PROPERTY(bool        maximized        READ       isMaximized)bool      isMaximized() const;
public Q_SLOTS :void    showMaximized();public:
// Q_PROPERTY(bool        fullScreen       READ       isFullScreen)bool      isFullScreen() const;
public Q_SLOTS :void    showFullScreen();public:
// Q_PROPERTY(bool        acceptDrops
//            READ        acceptDrops      WRITE      setAcceptDrops)bool        acceptDrops() const;void     setAcceptDrops(bool on);// Q_PROPERTY(bool        windowModified
//            READ      isWindowModified   WRITE      setWindowModified)bool      isWindowModified() const;
public Q_SLOTS :void     setWindowModified(bool);public:
// Q_PROPERTY(bool        autoFillBackground
//            READ        autoFillBackground
//            WRITE    setAutoFillBackground)bool        autoFillBackground() const;void     setAutoFillBackground(bool   enabled);// Q_PROPERTY(bool                         modal            READ      isModal)bool                       isModal() const;// Q_PROPERTY(Qt::WindowModality      windowModality
//             READ                   windowModality
//             WRITE               setWindowModality)Qt::WindowModality      windowModality() const;void       setWindowModality( Qt::WindowModality    windowModality);// QDOC_PROPERTY(Qt::WindowFlags    windowFlags
//             READ                 windowFlags
//             WRITE             setWindowFlags)inline   Qt::WindowFlags    windowFlags() const;void              setWindowFlags(Qt::WindowFlags  type);            void         overrideWindowFlags(Qt::WindowFlags  type);void              setWindowFlag (Qt::WindowType,  bool on = true);// Q_PROPERTY(QPalette    palette
//             READ       palette         WRITE      setPalette)const QPalette &  palette() const;void    setPalette(const QPalette &);// Q_PROPERTY(QFont       font
//             READ       font            WRITE      setFont)const QFont  &    font() const;void    setFont(const QFont &);QFontMetrics      fontMetrics() const;QFontInfo         fontInfo() const;// Q_PROPERTY(QCursor     cursor
//             READ       cursor          WRITE      setCursor
//             RESET unsetCursor)QCursor    cursor() const;void    setCursor(const QCursor &);void  unsetCursor();// Q_PROPERTY(Qt::FocusPolicy         focusPolicy //也有布尔属性 focus，在前面
//             READ                   focusPolicy
//             WRITE               setFocusPolicy)Qt::FocusPolicy        focusPolicy() const; //焦点策略void                setFocusPolicy(Qt::FocusPolicy policy);QWidget  *             focusProxy() const;  //焦点代理，一字之差void                setFocusProxy(QWidget *);// Q_PROPERTY(QSizePolicy             sizePolicy
//             READ                   sizePolicy
//             WRITE               setSizePolicy)QSizePolicy            sizePolicy() const;void                setSizePolicy(QSizePolicy);inline void                setSizePolicy(QSizePolicy::Policy horizontal,QSizePolicy::Policy vertical);// Q_PROPERTY(Qt::ContextMenuPolicy     contextMenuPolicy
//             READ                     contextMenuPolicy
//             WRITE                 setContextMenuPolicy)Qt::ContextMenuPolicy     contextMenuPolicy() const;void    setContextMenuPolicy(Qt::ContextMenuPolicy policy);// Q_PROPERTY(Qt::LayoutDirection       layoutDirection
//             READ                     layoutDirection
//             WRITE                 setLayoutDirection
//             RESET               unsetLayoutDirection)Qt::LayoutDirection       layoutDirection() const;void   setLayoutDirection(  Qt::LayoutDirection   direction  );void                unsetLayoutDirection();// Q_PROPERTY(Qt::InputMethodHints      inputMethodHints
//             READ                     inputMethodHints
//             WRITE                 setInputMethodHints)Qt::InputMethodHints      inputMethodHints() const;void   setInputMethodHints( Qt::InputMethodHints  hints);// Q_PROPERTY(double      windowOpacity    //不透明度
//             READ       windowOpacity    WRITE    setWindowOpacity)qreal      windowOpacity() const;void    setWindowOpacity(qreal level);// Q_PROPERTY(QRect           geometry
//             READ           geometry      WRITE      setGeometry)const QRect    &      geometry() const;inline void        setGeometry(int x, int y, int w, int h);void        setGeometry(const QRect &);QByteArray        saveGeometry() const;void     updateGeometry();bool    restoreGeometry(const QByteArray & geometry);// Q_PROPERTY(QRect      frameGeometry      READ     frameGeometry)QRect      frameGeometry() const;// Q_PROPERTY(QRect     normalGeometry      READ    normalGeometry)QRect     normalGeometry() const;// Q_PROPERTY(QRect               rect      READ              rect)inline    QRect               rect() const;QRect       contentsRect() const;// Q_PROPERTY(QRect       childrenRect      READ      childrenRect)QRect       childrenRect() const;// Q_PROPERTY(QRegion     childrenRegion    READ      childrenRegion)QRegion     childrenRegion() const;QRegion      visibleRegion() const;// Q_PROPERTY(QSize         frameSize       READ      frameSize)QSize         frameSize() const;// Q_PROPERTY(QSize              size
//             READ              size       WRITE        resize
//             DESIGNABLE        false      STORED       false)QSize              size() const;void             resize(int w, int h);void             resize(const QSize &);// Q_PROPERTY(QSize              sizeHint    READ       sizeHint)virtual   QSize              sizeHint()    const;virtual   bool      hasHeightForWidth()    const;virtual   int          heightForWidth(int) const;// Q_PROPERTY(QSize       minimumSizeHint
//             READ       minimumSizeHint)virtual   QSize       minimumSizeHint() const;// Q_PROPERTY(QSize              sizeIncrement
//             READ              sizeIncrement
//             WRITE          setSizeIncrement)QSize              sizeIncrement() const;void           setSizeIncrement(const QSize &);void           setSizeIncrement(int w, int h);// Q_PROPERTY(QSize          baseSize
//             READ          baseSize        WRITE      setBaseSize)QSize          baseSize() const;void       setBaseSize(const QSize &);void       setBaseSize(int basew, int baseh);// Q_PROPERTY(QSize       minimumSize
//             READ       minimumSize        WRITE      setMinimumSize)QSize       minimumSize() const;void     setMinimumSize(const QSize &);void     setMinimumSize(int minw, int minh);// Q_PROPERTY(QSize       maximumSize
//             READ       maximumSize        WRITE      setMaximumSize)QSize       maximumSize() const;void    setMaximumSize(const QSize &);void    setMaximumSize(int maxw, int maxh);// Q_PROPERTY(int            minimumWidth
//            READ           minimumWidth       WRITE      setMinimumWidth
//            STORED            false
//            DESIGNABLE        false)int            minimumWidth() const;void        setMinimumWidth(int minw);// Q_PROPERTY(int            minimumHeight
//            READ           minimumHeight      WRITE      setMinimumHeight
//            STORED            false
//            DESIGNABLE        false)int            minimumHeight() const;void        setMinimumHeight(int minh);// Q_PROPERTY(int              maximumWidth
//            READ             maximumWidth       WRITE      setMaximumWidth
//            STORED           false
//            DESIGNABLE       false)int              maximumWidth() const;void          setMaximumWidth(int maxw);// Q_PROPERTY(int              maximumHeight
//            READ             maximumHeight      WRITE      setMaximumHeight
//            STORED           false
//            DESIGNABLE       false)int              maximumHeight() const;void          setMaximumHeight(int maxh);// Q_PROPERTY(int   width    READ   width)inline    int   width() const;// Q_PROPERTY(int   height   READ   height)inline    int   height() const;// Q_PROPERTY(int   x        READ    x)int   x() const;// Q_PROPERTY(int   y        READ    y)int   y() const;// Q_PROPERTY(QPoint    pos
//            READ      pos   WRITE    move
//            DESIGNABLE      false    STORED   false)QPoint    pos() const;void      move(int x, int y);void      move(const QPoint &);protected : //从保护、公共到槽函数，修改窗体的成员函，结合起来看，学习void initPainter(QPainter * painter) const override;void create(WId = 0,    bool initializeWindow = true,bool destroyOldWindow = true);void destroy(bool destroyWindow = true,  bool destroySubWindows = true);public  :inlinevoid update(int x, int y, int w, int h);void update(const QRect   &);void update(const QRegion &);void repaint(int x, int y, int w, int h);void repaint(const QRect   &);void repaint(const QRegion &);protected Q_SLOTS:void updateMicroFocus(Qt::InputMethodQuery query = Qt::ImQueryAll);public Q_SLOTS:void update ();void repaint();//void show();//void hide();//bool close();void raise();void lower();//  void showMinimized();//  void showMaximized();//  void showFullScreen();void showNormal();//        void    setDisabled      (bool);//        void    setEnabled       (bool);//        void    setWindowTitle   (const QString &);//virtual void    setVisible       (bool visible);//        void    setStyleSheet    (const QString & styleSheet);//        void    setHidden        (bool hidden);//        void    setWindowModified(bool);//inline  void    setFocus         () { setFocus(Qt::OtherFocusReason); }Q_SIGNALS://void    windowTitleChanged     (const QString & title);//void     windowIconChanged     (const QIcon   & icon);//void windowIconTextChanged     (const QString & iconText);void   customContextMenuRequested(const QPoint  & pos);public:QStyle   *     style() const;void        setStyle(QStyle *);QLayout  *    layout() const;void       setLayout(QLayout *);QScreen  *    screen() const;void       setScreen(QScreen *);WId               winId() const;inline  WId       internalWinId() const { return data->winid; }WId      effectiveWinId() const;void        createWinId(); // internal, going awayQString                       windowRole() const;void                       setWindowRole(const QString &);QPalette::ColorRole       backgroundRole() const;void                   setBackgroundRole(QPalette::ColorRole);QPalette::ColorRole       foregroundRole() const;void                   setForegroundRole(QPalette::ColorRole);QGraphicsEffect      *    graphicsEffect() const;void                   setGraphicsEffect(QGraphicsEffect * effect);QGraphicsProxyWidget *    graphicsProxyWidget() const;QRegion       mask() const;void       setMask(const QBitmap &);void       setMask(const QRegion &);void     clearMask();Qt::WindowStates           windowState() const;void                    setWindowState(Qt::WindowStates state);void               overrideWindowState(Qt::WindowStates state);QMargins       contentsMargins() const;void        setContentsMargins(int left, int top, int right, int bottom);void        setContentsMargins(const QMargins & margins);inline  bool      testAttribute(Qt::WidgetAttribute) const;void       setAttribute(Qt::WidgetAttribute, bool on = true);bool    isAncestorOf(const QWidget * child) const;void    setParent   (QWidget * parent);void    setParent   (QWidget * parent, Qt::WindowFlags f);QList<QAction *>       actions() const;void             insertActions(QAction * before, const QList<QAction *> & actions);void                addActions(                  const QList<QAction *> & actions);void             insertAction (QAction * before, QAction * action);void                addAction (                  QAction * action);void             removeAction (                  QAction * action);Q_INVOKABLE   QPixmap   grab(const QRect & rectangle = QRect(QPoint(0, 0),QSize(-1, -1)));void                    grabGesture(Qt::GestureType  type,Qt::GestureFlags flags = Qt::GestureFlags());void                  ungrabGesture(Qt::GestureType  type);static QWidget *   mouseGrabber  (); //关于鼠标void                    grabMouse();void                    grabMouse(const QCursor &);void                 releaseMouse();static QWidget * keyboardGrabber (); //关于键盘void                     grabKeyboard();void                  releaseKeyboard();int             grabShortcut(const QKeySequence & key, //快捷键Qt::ShortcutContext  context = Qt::WindowShortcut);void         releaseShortcut(int id);void             setShortcutEnabled   (int id, bool enable = true);void             setShortcutAutoRepeat(int id, bool enable = true);bool underMouse   () const;inline  bool isRightToLeft() const { return layoutDirection() == Qt::RightToLeft; }inline  bool isLeftToRight() const { return layoutDirection() == Qt::LeftToRight; }bool                      isWindow() const;QWidget *                   window() const;QWindow *                   windowHandle() const;QWidget *             parentWidget() const;QWidget *       nativeParentWidget() const;inline  QWidget *           topLevelWidget() const { return window(); }QWidget *              focusWidget() const;QWidget *        nextInFocusChain () const;QWidget *    previousInFocusChain () const;static  QWidget *                     find(WId);inline  QWidget *                  childAt(int x, int y) const;QWidget *                  childAt(const QPoint & p) const;static  QWidget *    createWindowContainer(QWindow * window,QWidget    * parent=nullptr,Qt::WindowFlags flags = Qt::WindowFlags());QPointF mapTo      (const QWidget *, const QPointF &) const;QPoint  mapTo      (const QWidget *, const QPoint  &) const;QPointF mapToGlobal(const QPointF &) const;QPoint  mapToGlobal(const QPoint  &) const;QPointF mapToParent(const QPointF &) const;QPoint  mapToParent(const QPoint  &) const;QPointF mapFrom      (const QWidget *, const QPointF &) const;QPoint  mapFrom      (const QWidget *, const QPoint  &) const;QPointF mapFromGlobal(const QPointF &) const;QPoint  mapFromGlobal(const QPoint  &) const;QPointF mapFromParent(const QPointF &) const;QPoint  mapFromParent(const QPoint  &) const;int                       devType() const override;inline Qt::WindowType  windowType() const;QBackingStore        * backingStore       () const;QPaintEngine         * paintEngine        () const override; //以下开始各种写函数void activateWindow();void stackUnder    (QWidget *);void adjustSize    ();void ensurePolished() const;void scroll(int dx, int dy);void scroll(int dx, int dy, const QRect &);static  void setTabOrder   (QWidget *, QWidget *);void setFixedSize  (const QSize &);void setFixedSize  (int w, int h);void setFixedWidth (int w);void setFixedHeight(int h);void render(QPaintDevice  * target,const QPoint  & targetOffset = QPoint (),const QRegion & sourceRegion = QRegion(),RenderFlags renderFlags = RenderFlags(DrawWindowBackground | DrawChildren));void render(QPainter      * painter,const QPoint  & targetOffset = QPoint(),const QRegion & sourceRegion = QRegion(),RenderFlags renderFlags = RenderFlags(DrawWindowBackground | DrawChildren));protected:  // Event handlersbool                         event(QEvent            * event) override;virtual void       mousePressEvent(QMouseEvent       * event);virtual void     mouseReleaseEvent(QMouseEvent       * event);virtual void mouseDoubleClickEvent(QMouseEvent       * event);virtual void        mouseMoveEvent(QMouseEvent       * event);virtual void            wheelEvent(QWheelEvent       * event);virtual void         keyPressEvent(QKeyEvent         * event);virtual void       keyReleaseEvent(QKeyEvent         * event);virtual void          focusInEvent(QFocusEvent       * event);virtual void         focusOutEvent(QFocusEvent       * event);virtual void            enterEvent(QEnterEvent       * event);virtual void            leaveEvent(QEvent            * event);virtual void            paintEvent(QPaintEvent       * event);virtual void             moveEvent(QMoveEvent        * event);virtual void           resizeEvent(QResizeEvent      * event);virtual void            closeEvent(QCloseEvent       * event);virtual void      contextMenuEvent(QContextMenuEvent * event);virtual void           tabletEvent(QTabletEvent      * event);virtual void           actionEvent(QActionEvent      * event);virtual void        dragEnterEvent(QDragEnterEvent   * event);virtual void         dragMoveEvent(QDragMoveEvent    * event);virtual void        dragLeaveEvent(QDragLeaveEvent   * event);virtual void             dropEvent(QDropEvent        * event);virtual void             showEvent(QShowEvent        * event);virtual void             hideEvent(QHideEvent        * event);virtual void           changeEvent(QEvent            *      );virtual bool           nativeEvent(const QByteArray & eventType, void * message,qintptr * result);virtual void      inputMethodEvent(QInputMethodEvent *      );
public:virtual QVariant  inputMethodQuery(Qt::InputMethodQuery) const;protected:friend class QDataWidgetMapperPrivate; // for access to focusNextPrevChildvirtual bool focusNextPrevChild(bool next);inline  bool focusNextChild()     { return focusNextPrevChild(true ); }inline  bool focusPreviousChild() { return focusNextPrevChild(false); }int            metric       (PaintDeviceMetric)  const override;QPaintDevice * redirected   (QPoint * offset)    const override;QPainter     * sharedPainter()                   const override;}; //完结 class QWidget : public QObject, public QPaintDevice
Q_DECLARE_OPERATORS_FOR_FLAGS(QWidget::RenderFlags)QT_END_NAMESPACE#endif // QWIDGET_H

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谢谢