qwidget_p.h

奇趣公司比较新的qt/emd版本

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#ifndef QWIDGET_P_H
#define QWIDGET_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of qapplication_*.cpp, qwidget*.cpp and qfiledialog.cpp.  This header
// file may change from version to version without notice, or even be removed.
//
// We mean it.
//

#include "QtGui/qwidget.h"
#include "private/qobject_p.h"
#include "QtCore/qrect.h"
#include "QtCore/qlocale.h"
#include "QtGui/qregion.h"
#include "QtGui/qsizepolicy.h"
#include "QtGui/qstyle.h"

#ifdef Q_WS_WIN
#include "QtCore/qt_windows.h"
#endif // Q_WS_WIN

#ifdef Q_WS_X11
#include "QtGui/qx11info_x11.h"
#endif

#if defined(Q_WS_QWS)
#include "QtGui/qinputcontext.h"
#include "QtGui/qscreen_qws.h"
#endif

#if defined(Q_WS_QWS) || defined(Q_WS_X11)
//#define Q_WIDGET_USE_DIRTYLIST
#endif

#ifndef Q_WS_MAC
#define Q_WIDGET_CACHE_OPAQUEREGIONS
#endif

//#define Q_WIN_USE_QT_UPDATE_EVENT
//#define Q_RATE_LIMIT_PAINTING
//#define Q_FLATTEN_EXPOSE

// Extra QWidget data
//  - to minimize memory usage for members that are seldom used.
//  - top-level widgets have extra extra data to reduce cost further
#if defined(Q_WS_QWS)
class QWSManager;
#endif
#if defined(Q_WS_WIN)
class QOleDropTarget;
#endif
#if defined(Q_WS_MAC)
class QCoreGraphicsPaintEnginePrivate;
#endif
class QPaintEngine;
class QPixmap;
class QWidgetBackingStore;

class QStyle;

struct QTLWExtra {
    QString caption; // widget caption
    QString iconText; // widget icon text
    QString role; // widget role
    QIcon *icon; // widget icon
    QPixmap *iconPixmap;
    short incw, inch; // size increments
     // frame strut, don't use these directly, use QWidgetPrivate::frameStrut() instead.
    QRect frameStrut;
    uint opacity : 8;
    uint posFromMove : 1;
#ifndef Q_WS_MAC
    QWidgetBackingStore *backingStore;
#endif
#if defined(Q_WS_WIN)
    ulong savedFlags; // Save window flags while showing fullscreen
#else
    Qt::WindowFlags savedFlags; // Save widget flags while showing fullscreen
#endif
    short basew, baseh; // base sizes
#if defined(Q_WS_X11)
    WId parentWinId; // parent window Id (valid after reparenting)
    uint embedded : 1; // window is embedded in another Qt application
    uint spont_unmapped: 1; // window was spontaneously unmapped
    uint dnd : 1; // DND properties installed
    uint validWMState : 1; // is WM_STATE valid?
    uint waitingForMapNotify : 1; // show() has been called, haven't got the MapNotify yet
    QPoint fullScreenOffset;
    QBitmap *iconMask;
#endif
#if defined(Q_WS_MAC)
    quint32 wattr;
    quint32 wclass;
    WindowGroupRef group;
    uint resizer : 4;
    uint isSetGeometry : 1;
    uint isMove : 1;
#endif
#if defined(Q_WS_QWS) && !defined (QT_NO_QWS_MANAGER)
    QWSManager *qwsManager;
#endif
#if defined Q_WS_QWS
    bool inPaintTransaction;
#endif
#if defined(Q_WS_WIN)
    HICON winIconBig; // internal big Windows icon
    HICON winIconSmall; // internal small Windows icon
#endif
    QRect normalGeometry; // used by showMin/maximized/FullScreen
    QWindowSurface *windowSurface;
};

struct QWExtra {
    qint32 minw, minh; // minimum size
    qint32 maxw, maxh; // maximum size
    QPointer<QWidget> focus_proxy;
#ifndef QT_NO_CURSOR
    QCursor *curs;
#endif
    QTLWExtra *topextra; // only useful for TLWs
#if defined(Q_WS_WIN)
    QOleDropTarget *dropTarget; // drop target
#endif
#if defined(Q_WS_X11)
    WId xDndProxy; // XDND forwarding to embedded windows
#endif
    QRegion mask; // widget mask

//bit flags at the end to improve packing
#if defined(Q_WS_WIN)
    uint shown_mode : 8; // widget show mode
#ifndef QT_NO_DIRECT3D
    uint had_paint_on_screen : 1;
    uint had_no_system_bg : 1;
    uint had_auto_fill_bg : 1;
#endif
#endif
#if defined(Q_WS_X11)
    uint compress_events : 1;
#endif
    uint explicitMinSize : 2;
    uint autoFillBackground : 1;

    QPointer<QStyle> style;
    QString styleSheet;
};

class Q_GUI_EXPORT QWidgetPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QWidget)

public:
    explicit QWidgetPrivate(int version = QObjectPrivateVersion);
    ~QWidgetPrivate();

    QWExtra *extraData() const;
    QTLWExtra *topData() const;
    QTLWExtra *maybeTopData() const;
#ifndef Q_WS_MAC
    QWidgetBackingStore *maybeBackingStore() const;
#endif
#ifdef Q_WS_QWS
    void setMaxWindowState_helper();
#endif
    void init(QWidget *desktopWidget, Qt::WindowFlags f);
    void create_sys(WId window, bool initializeWindow, bool destroyOldWindow);
    void createRecursively();
    void createWinId(WId id = 0);

    void createTLExtra();
    void createExtra();
    void deleteExtra();
    void createSysExtra();
    void deleteSysExtra();
    void createTLSysExtra();
    void deleteTLSysExtra();
    void updateSystemBackground();
    void propagatePaletteChange();

    void setPalette_helper(const QPalette &);
    void resolvePalette();

#ifdef Q_WS_WIN
    void setMask_sys(const QRegion &);
#endif

#ifdef Q_WS_MAC
    void macUpdateSizeAttribute();
    void macUpdateHideOnSuspend();
    void macUpdateOpaqueSizeGrip();
    void macUpdateIgnoreMouseEvents();
    void macUpdateMetalAttribute();
    void macUpdateIsOpaque();
#endif

    void raise_sys();
    void lower_sys();
    void stackUnder_sys(QWidget *);

    void setFocus_sys();

    void setFont_helper(const QFont &);
    void resolveFont();

    void setLayoutDirection_helper(Qt::LayoutDirection);
    void resolveLayoutDirection();

    void setLocale_helper(const QLocale &l);
    void resolveLocale();

    void setStyle_helper(QStyle *newStyle, bool propagate, bool metalHack = false);
    void inheritStyle();

    bool isBackgroundInherited() const;

    void setUpdatesEnabled_helper(bool );

    void paintBackground(QPainter *, const QRect &, bool asRoot = true) const;
    enum DrawWidgetFlags {
        DrawAsRoot = 0x01,
        DrawPaintOnScreen = 0x02,
        DrawRecursive = 0x04,
        DrawInvisible = 0x08,
        DontSubtractOpaqueChildren = 0x10
    };
    void drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QPoint &offset, int flags = DrawAsRoot | DrawRecursive);

#ifdef Q_WS_MAC
    void render_helper(QWidget *widget, QPaintDevice *result, const QPoint &offset,
                       const QRect &rect, QWidget::RenderFlags renderFlags);
#endif

    QRect clipRect() const;
    QRegion clipRegion() const;
    void subtractOpaqueChildren(QRegion &rgn, const QRegion &clipRgn, const QPoint &offset, int startIdx = 0) const;
    void subtractOpaqueSiblings(QRegion &rgn, const QPoint &offset) const;
    void updateIsOpaque();
    bool isOpaque() const;
    bool hasBackground() const;

#ifdef Q_WIDGET_CACHE_OPAQUEREGIONS