summaryrefslogtreecommitdiffstats
path: root/src/widgets/kernel/qwidget_p.h
blob: 08954cc7789b69c4ae5217ddebc27a5e5e4875f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWidgets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#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 <QtWidgets/private/qtwidgetsglobal_p.h>
#include "QtWidgets/qwidget.h"
#include "private/qobject_p.h"
#include "QtCore/qrect.h"
#include "QtCore/qlocale.h"
#include "QtCore/qset.h"
#include "QtGui/qregion.h"
#include "QtGui/qinputmethod.h"
#include "QtGui/qopengl.h"
#include "QtGui/qsurfaceformat.h"
#include "QtGui/qscreen.h"
#include "QtWidgets/qsizepolicy.h"
#include "QtWidgets/qstyle.h"
#include "QtWidgets/qapplication.h"
#if QT_CONFIG(graphicseffect)
#include <private/qgraphicseffect_p.h>
#endif
#if QT_CONFIG(graphicsview)
#include "QtWidgets/qgraphicsproxywidget.h"
#include "QtWidgets/qgraphicsscene.h"
#include "QtWidgets/qgraphicsview.h"
#endif
#include <private/qgesture_p.h>
#include <qpa/qplatformbackingstore.h>

#include <vector>
#include <memory>

QT_BEGIN_NAMESPACE

Q_DECLARE_LOGGING_CATEGORY(lcWidgetPainting);

// Extra QWidget data
//  - to minimize memory usage for members that are seldom used.
//  - top-level widgets have extra extra data to reduce cost further
class QWidgetWindow;
class QPaintEngine;
class QPixmap;
class QWidgetRepaintManager;
class QGraphicsProxyWidget;
class QWidgetItemV2;
class QOpenGLContext;

class QStyle;

class QUnifiedToolbarSurface;

// implemented in qshortcut.cpp
bool qWidgetShortcutContextMatcher(QObject *object, Qt::ShortcutContext context);

class QUpdateLaterEvent : public QEvent
{
public:
    explicit QUpdateLaterEvent(const QRegion& paintRegion)
        : QEvent(UpdateLater), m_region(paintRegion)
    {
    }

    ~QUpdateLaterEvent()
    {
    }

    inline const QRegion &region() const { return m_region; }

protected:
    QRegion m_region;
};

struct QTLWExtra {
    // *************************** Cross-platform variables *****************************

    // Regular pointers (keep them together to avoid gaps on 64 bits architectures).
    std::unique_ptr<QIcon> icon; // widget icon
    std::unique_ptr<QWidgetRepaintManager> repaintManager;
    QBackingStore *backingStore;
    QPainter *sharedPainter;
    QWidgetWindow *window;
#ifndef QT_NO_OPENGL
    mutable std::unique_ptr<QOpenGLContext> shareContext;
#endif

    // Implicit pointers (shared_null).
    QString caption; // widget caption
    QString iconText; // widget icon text
    QString role; // widget role
    QString filePath; // widget file path

    // Other variables.
    short incw, inch; // size increments
    short basew, baseh; // base sizes
     // frame strut, don't use these directly, use QWidgetPrivate::frameStrut() instead.
    QRect frameStrut;
    QRect normalGeometry; // used by showMin/maximized/FullScreen
    Qt::WindowFlags savedFlags; // Save widget flags while showing fullscreen
    QScreen *initialScreen; // Screen when passing a QDesktop[Screen]Widget as parent.

#ifndef QT_NO_OPENGL
    std::vector<std::unique_ptr<QPlatformTextureList>> widgetTextures;
#endif

    // *************************** Cross-platform bit fields ****************************
    uint opacity : 8;
    uint posIncludesFrame : 1;
    uint sizeAdjusted : 1;
    uint embedded : 1;
};

struct QWExtra {
    // *************************** Cross-platform variables *****************************

    // Regular pointers (keep them together to avoid gaps on 64 bits architectures).
    void *glContext; // if the widget is hijacked by QGLWindowSurface
    std::unique_ptr<QTLWExtra> topextra; // only useful for TLWs
#if QT_CONFIG(graphicsview)
    QGraphicsProxyWidget *proxyWidget; // if the widget is embedded
#endif
#ifndef QT_NO_CURSOR
    std::unique_ptr<QCursor> curs;
#endif
    QPointer<QStyle> style;
    QPointer<QWidget> focus_proxy;

    // Implicit pointers (shared_empty/shared_null).
    QRegion mask; // widget mask
    QString styleSheet;

    // Other variables.
    qint32 minw;
    qint32 minh; // minimum size
    qint32 maxw;
    qint32 maxh; // maximum size
    quint16 customDpiX;
    quint16 customDpiY;
    QSize staticContentsSize;

    // *************************** Cross-platform bit fields ****************************
    uint explicitMinSize : 2;
    uint explicitMaxSize : 2;
    uint autoFillBackground : 1;
    uint nativeChildrenForced : 1;
    uint inRenderWithPainter : 1;
    uint hasMask : 1;
    uint hasWindowContainer : 1;
};

/*!
    \internal

    Returns \c true if \a p or any of its parents enable the
    Qt::BypassGraphicsProxyWidget window flag. Used in QWidget::show() and
    QWidget::setParent() to determine whether it's necessary to embed the
    widget into a QGraphicsProxyWidget or not.
*/
static inline bool bypassGraphicsProxyWidget(const QWidget *p)
{
    while (p) {
        if (p->windowFlags() & Qt::BypassGraphicsProxyWidget)
            return true;
        p = p->parentWidget();
    }
    return false;
}

class Q_WIDGETS_EXPORT QWidgetPrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QWidget)
    Q_GADGET

public:
    // *************************** Cross-platform ***************************************
    enum DrawWidgetFlag {
        DrawAsRoot = 0x01,
        DrawPaintOnScreen = 0x02,
        DrawRecursive = 0x04,
        DrawInvisible = 0x08,
        DontSubtractOpaqueChildren = 0x10,
        DontDrawOpaqueChildren = 0x20,
        DontDrawNativeChildren = 0x40,
        DontSetCompositionMode = 0x80
    };
    Q_DECLARE_FLAGS(DrawWidgetFlags, DrawWidgetFlag)
    Q_FLAG(DrawWidgetFlags)

    enum CloseMode {
        CloseNoEvent,
        CloseWithEvent,
        CloseWithSpontaneousEvent
    };
    Q_ENUM(CloseMode)

    enum Direction {
        DirectionNorth = 0x01,
        DirectionEast = 0x10,
        DirectionSouth = 0x02,
        DirectionWest = 0x20
    };
    Q_ENUM(Direction)

    // Functions.
    explicit QWidgetPrivate(int version = QObjectPrivateVersion);
    ~QWidgetPrivate();

    static QWidgetPrivate *get(QWidget *w) { return w->d_func(); }
    static const QWidgetPrivate *get(const QWidget *w) { return w->d_func(); }

    QWExtra *extraData() const;
    QTLWExtra *topData() const;
    QTLWExtra *maybeTopData() const;
    QPainter *sharedPainter() const;
    void setSharedPainter(QPainter *painter);
    QWidgetRepaintManager *maybeRepaintManager() const;

    enum class WindowHandleMode {
        Direct,
        Closest,
        TopLevel
    };
    QWindow *windowHandle(WindowHandleMode mode = WindowHandleMode::Direct) const;
    QWindow *_q_closestWindowHandle() const; // Private slot in QWidget

    QScreen *associatedScreen() const;

    template <typename T>
    void repaint(T t);

    template <typename T>
    void update(T t);

    void init(QWidget *desktopWidget, Qt::WindowFlags f);
    void create();
    void createRecursively();
    void createWinId();

    bool setScreenForPoint(const QPoint &pos);
    bool setScreen(QScreen *screen);

    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();
    QPalette naturalWidgetPalette(QPalette::ResolveMask inheritedMask) const;

    void setMask_sys(const QRegion &);

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

    QWidget *deepestFocusProxy() const;
    void setFocus_sys();
    void updateFocusChild();

    void updateFont(const QFont &);
    inline void setFont_helper(const QFont &font) {
        if (directFontResolveMask == font.resolve() && data.fnt == font)
            return;
        updateFont(font);
    }
    QFont localFont() const;
    void resolveFont();
    QFont naturalWidgetFont(uint inheritedMask) const;

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

    void setLocale_helper(const QLocale &l, bool forceUpdate = false);
    void resolveLocale();

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

    void setUpdatesEnabled_helper(bool );

    bool updateBrushOrigin(QPainter *, const QBrush &brush) const;
    void paintBackground(QPainter *, const QRegion &, DrawWidgetFlags flags = DrawAsRoot) const;
    bool isAboutToShow() const;
    QRegion prepareToRender(const QRegion &region, QWidget::RenderFlags renderFlags);
    void render_helper(QPainter *painter, const QPoint &targetOffset, const QRegion &sourceRegion,
                       QWidget::RenderFlags renderFlags);
    void render(QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion,
                QWidget::RenderFlags renderFlags);
    void drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QPoint &offset, DrawWidgetFlags flags,
                    QPainter *sharedPainter = nullptr, QWidgetRepaintManager *repaintManager = nullptr);
    void sendPaintEvent(const QRegion &toBePainted);


    void paintSiblingsRecursive(QPaintDevice *pdev, const QObjectList& children, int index,
                                const QRegion &rgn, const QPoint &offset, DrawWidgetFlags flags,
                                QPainter *sharedPainter, QWidgetRepaintManager *repaintManager);

#if QT_CONFIG(graphicsview)
    static QGraphicsProxyWidget * nearestGraphicsProxyWidget(const QWidget *origin);
#endif
    bool shouldPaintOnScreen() const;
    void paintOnScreen(const QRegion &rgn);

    QRect clipRect() const;
    QRegion clipRegion() const;
    void setSystemClip(QPaintEngine *paintEngine, qreal devicePixelRatio, const QRegion &region);
    void subtractOpaqueChildren(QRegion &rgn, const QRect &clipRect) const;
    void subtractOpaqueSiblings(QRegion &source, bool *hasDirtySiblingsAbove = nullptr,
                                bool alsoNonOpaque = false) const;
    void clipToEffectiveMask(QRegion &region) const;
    void updateIsOpaque();
    void setOpaque(bool opaque);
    void updateIsTranslucent();
#if QT_CONFIG(graphicseffect)
    void invalidateGraphicsEffectsRecursively();
#endif // QT_CONFIG(graphicseffect)

    const QRegion &getOpaqueChildren() const;
    void setDirtyOpaqueRegion();

    bool close_helper(CloseMode mode);

    void setWindowIcon_helper();
    void setWindowIcon_sys();
    void setWindowOpacity_sys(qreal opacity);
    void adjustQuitOnCloseAttribute();

    void scrollChildren(int dx, int dy);
    void moveRect(const QRect &, int dx, int dy);
    void scrollRect(const QRect &, int dx, int dy);
    void invalidateBackingStore_resizeHelper(const QPoint &oldPos, const QSize &oldSize);

    template <class T>
    void invalidateBackingStore(const T &);

    QRegion overlappedRegion(const QRect &rect, bool breakAfterFirst = false) const;
    void syncBackingStore();
    void syncBackingStore(const QRegion &region);

    bool shouldDiscardSyncRequest() const;

    // tells the input method about the widgets transform
    void updateWidgetTransform(QEvent *event);

    void reparentFocusWidgets(QWidget *oldtlw);

    static int pointToRect(const QPoint &p, const QRect &r);

    void setWinId(WId);
    void showChildren(bool spontaneous);
    void hideChildren(bool spontaneous);
    void setParent_sys(QWidget *parent, Qt::WindowFlags);
    void scroll_sys(int dx, int dy);
    void scroll_sys(int dx, int dy, const QRect &r);
    void deactivateWidgetCleanup();
    void setGeometry_sys(int, int, int, int, bool);
    void fixPosIncludesFrame();
    void sendPendingMoveAndResizeEvents(bool recursive = false, bool disableUpdates = false);
    void activateChildLayoutsRecursively();
    void show_recursive();
    void show_helper();
    void show_sys();
    void hide_sys();
    void hide_helper();
    void _q_showIfNotHidden();
    void setVisible(bool);

    void setEnabled_helper(bool);
    static void adjustFlags(Qt::WindowFlags &flags, QWidget *w = nullptr);

    void updateFrameStrut();
    QRect frameStrut() const;

#ifdef QT_KEYPAD_NAVIGATION
    static bool navigateToDirection(Direction direction);
    static QWidget *widgetInNavigationDirection(Direction direction);
    static bool canKeypadNavigate(Qt::Orientation orientation);
    static bool inTabWidget(QWidget *widget);
#endif

    void setWindowIconText_sys(const QString &cap);
    void setWindowIconText_helper(const QString &cap);
    void setWindowTitle_sys(const QString &cap);
    void setWindowFilePath_sys(const QString &filePath);

#ifndef QT_NO_CURSOR
    void setCursor_sys(const QCursor &cursor);
    void unsetCursor_sys();
#endif

    void setWindowTitle_helper(const QString &cap);
    void setWindowFilePath_helper(const QString &filePath);
    void setWindowModified_helper();
    virtual void setWindowFlags(Qt::WindowFlags windowFlags);

    bool setMinimumSize_helper(int &minw, int &minh);
    bool setMaximumSize_helper(int &maxw, int &maxh);
    void setConstraints_sys();
    bool pointInsideRectAndMask(const QPoint &) const;
    QWidget *childAt_helper(const QPoint &, bool) const;
    QWidget *childAtRecursiveHelper(const QPoint &p, bool) const;
    void updateGeometry_helper(bool forceUpdate);

    void getLayoutItemMargins(int *left, int *top, int *right, int *bottom) const;
    void setLayoutItemMargins(int left, int top, int right, int bottom);
    void setLayoutItemMargins(QStyle::SubElement element, const QStyleOption *opt = nullptr);

    void updateContentsRect();
    QMargins safeAreaMargins() const;

    // aboutToDestroy() is called just before the contents of
    // QWidget::destroy() is executed. It's used to signal QWidget
    // sub-classes that their internals are about to be released.
    virtual void aboutToDestroy() {}

    inline QWidget *effectiveFocusWidget() {
        QWidget *w = q_func();
        while (w->focusProxy())
            w = w->focusProxy();
        return w;
    }

    void setModal_sys();

    // These helper functions return the (available) geometry for the screen
    // the widget is on, and takes care if this one is embedded in a QGraphicsView.
    static QRect graphicsViewParentRect(const QWidget *widget)
    {
        QRect rect;
#if QT_CONFIG(graphicsview)
        QGraphicsProxyWidget *ancestorProxy = widget->d_func()->nearestGraphicsProxyWidget(widget);
        //It's embedded if it has an ancestor
        if (ancestorProxy) {
            if (!bypassGraphicsProxyWidget(widget) && ancestorProxy->scene() != nullptr) {
                // One view, let be smart and return the viewport rect then the popup is aligned
                if (ancestorProxy->scene()->views().size() == 1) {
                    QGraphicsView *view = ancestorProxy->scene()->views().at(0);
                    rect = view->mapToScene(view->viewport()->rect()).boundingRect().toRect();
                } else {
                    rect = ancestorProxy->scene()->sceneRect().toRect();
                }
            }
        }
#else
        Q_UNUSED(widget);
#endif
        return rect;
    }
    static QRect screenGeometry(const QWidget *widget)
    {
        QRect rect = graphicsViewParentRect(widget);
        if (rect.isNull())
            rect = widget->screen()->geometry();
        return rect;
    }
    static QRect availableScreenGeometry(const QWidget *widget)
    {
        QRect rect = graphicsViewParentRect(widget);
        if (rect.isNull())
            rect = widget->screen()->availableGeometry();
        return rect;
    }

    inline void setRedirected(QPaintDevice *replacement, const QPoint &offset)
    {
        Q_ASSERT(q_func()->testAttribute(Qt::WA_WState_InPaintEvent));
        redirectDev = replacement;
        redirectOffset = offset;
    }

    inline QPaintDevice *redirected(QPoint *offset) const
    {
        if (offset)
            *offset = redirectDev ? redirectOffset : QPoint();
        return redirectDev;
    }

    inline void restoreRedirected()
    { redirectDev = nullptr; }

    inline void enforceNativeChildren()
    {
        if (!extra)
            createExtra();

        if (extra->nativeChildrenForced)
            return;
        extra->nativeChildrenForced = 1;

        for (int i = 0; i < children.size(); ++i) {
            if (QWidget *child = qobject_cast<QWidget *>(children.at(i)))
                child->setAttribute(Qt::WA_NativeWindow);
        }
    }

    inline bool nativeChildrenForced() const
    {
        return extra ? extra->nativeChildrenForced : false;
    }

    inline QRect effectiveRectFor(const QRegion &region) const
    {
        return effectiveRectFor(region.boundingRect());
    }

    inline QRect effectiveRectFor(const QRect &rect) const
    {
#if QT_CONFIG(graphicseffect)
        if (graphicsEffect && graphicsEffect->isEnabled())
            return graphicsEffect->boundingRectFor(rect).toAlignedRect();
#endif // QT_CONFIG(graphicseffect)
        return rect;
    }

    QSize adjustedSize() const;

    inline void handleSoftwareInputPanel(Qt::MouseButton button, bool clickCausedFocus)
    {
        Q_Q(QWidget);
        if (button == Qt::LeftButton && qApp->autoSipEnabled()) {
            QStyle::RequestSoftwareInputPanel behavior = QStyle::RequestSoftwareInputPanel(
                    q->style()->styleHint(QStyle::SH_RequestSoftwareInputPanel));
            if (!clickCausedFocus || behavior == QStyle::RSIP_OnMouseClick) {
                QGuiApplication::inputMethod()->show();
            }
        }
    }

    void setWSGeometry();

    inline QPoint mapToWS(const QPoint &p) const
    { return p - data.wrect.topLeft(); }

    inline QPoint mapFromWS(const QPoint &p) const
    { return p + data.wrect.topLeft(); }

    inline QRect mapToWS(const QRect &r) const
    { return r.translated(-data.wrect.topLeft()); }

    inline QRect mapFromWS(const QRect &r) const
    { return r.translated(data.wrect.topLeft()); }

    QOpenGLContext *shareContext() const;

    virtual QObject *focusObject() { return nullptr; }

#ifndef QT_NO_OPENGL
    virtual GLuint textureId() const { return 0; }
    virtual QPlatformTextureList::Flags textureListFlags() {
        Q_Q(QWidget);
        return q->testAttribute(Qt::WA_AlwaysStackOnTop)
            ? QPlatformTextureList::StacksOnTop
            : QPlatformTextureList::Flags();
    }
    virtual QImage grabFramebuffer() { return QImage(); }
    virtual void beginBackingStorePainting() { }
    virtual void endBackingStorePainting() { }
    virtual void beginCompose() { }
    virtual void endCompose() { }
    void setRenderToTexture() { renderToTexture = true; setTextureChildSeen(); }
    void setTextureChildSeen()
    {
        Q_Q(QWidget);
        if (textureChildSeen)
            return;
        textureChildSeen = 1;

        if (!q->isWindow()) {
            QWidget *parent = q->parentWidget();
            if (parent)
                get(parent)->setTextureChildSeen();
        }
    }
    static void sendComposeStatus(QWidget *w, bool end);
    // Called on setViewport().
    virtual void initializeViewportFramebuffer() { }
    // When using a QOpenGLWidget as viewport with QAbstractScrollArea, resize events are
    // filtered away from the widget. This is fine for QGLWidget but bad for QOpenGLWidget
    // since the fbo must be resized. We need an alternative way to notify.
    virtual void resizeViewportFramebuffer() { }
    // Called after each paint event.
    virtual void resolveSamples() { }
#endif

    static void setWidgetParentHelper(QObject *widgetAsObject, QObject *newParent);

    // Variables.
    // Regular pointers (keep them together to avoid gaps on 64 bit architectures).
    std::unique_ptr<QWExtra> extra;
    QWidget *focus_next;
    QWidget *focus_prev;
    QWidget *focus_child;
    QLayout *layout;
    QRegion *needsFlush;
    QPaintDevice *redirectDev;
    QWidgetItemV2 *widgetItem;
    QPaintEngine *extraPaintEngine;
    mutable const QMetaObject *polished;
    QGraphicsEffect *graphicsEffect;
    // All widgets are added into the allWidgets set. Once
    // they receive a window id they are also added to the mapper.
    // This should just ensure that all widgets are deleted by QApplication
    static QWidgetMapper *mapper;
    static QWidgetSet *allWidgets;
#if !defined(QT_NO_IM)
    Qt::InputMethodHints imHints;
#endif
#ifdef QT_KEYPAD_NAVIGATION
    static QPointer<QWidget> editingWidget;
#endif

    // Implicit pointers (shared_null/shared_empty).
    QRegion opaqueChildren;
    QRegion dirty;
#if QT_CONFIG(tooltip)
    QString toolTip;
    int toolTipDuration;
#endif
#if QT_CONFIG(statustip)
    QString statusTip;
#endif
#if QT_CONFIG(whatsthis)
    QString whatsThis;
#endif
#ifndef QT_NO_ACCESSIBILITY
    QString accessibleName;
    QString accessibleDescription;
#endif

    // Other variables.
    uint directFontResolveMask;
    uint inheritedFontResolveMask;
    decltype(std::declval<QPalette>().resolve()) directPaletteResolveMask;
    QPalette::ResolveMask inheritedPaletteResolveMask;
    short leftmargin;
    short topmargin;
    short rightmargin;
    short bottommargin;
    signed char leftLayoutItemMargin;
    signed char topLayoutItemMargin;
    signed char rightLayoutItemMargin;
    signed char bottomLayoutItemMargin;
    static int instanceCounter; // Current number of widget instances
    static int maxInstances; // Maximum number of widget instances
    Qt::HANDLE hd;
    QWidgetData data;
    QSizePolicy size_policy;
    QLocale locale;
    QPoint redirectOffset;
#ifndef QT_NO_ACTION
    QList<QAction*> actions;
#endif
#ifndef QT_NO_GESTURES
    QMap<Qt::GestureType, Qt::GestureFlags> gestureContext;
#endif

    // Bit fields.
    uint high_attributes[4]; // the low ones are in QWidget::widget_attributes
    QPalette::ColorRole fg_role : 8;
    QPalette::ColorRole bg_role : 8;
    uint dirtyOpaqueChildren : 1;
    uint isOpaque : 1;
    uint retainSizeWhenHiddenChanged : 1;
    uint inDirtyList : 1;
    uint isScrolled : 1;
    uint isMoved : 1;
    uint usesDoubleBufferedGLContext : 1;
    uint mustHaveWindowHandle : 1;
    uint renderToTexture : 1;
    uint textureChildSeen : 1;
#ifndef QT_NO_IM
    uint inheritsInputMethodHints : 1;
#endif
#ifndef QT_NO_OPENGL
    uint renderToTextureReallyDirty : 1;
    uint renderToTextureComposeActive : 1;
#endif
    uint childrenHiddenByWState : 1;
    uint childrenShownByExpose : 1;

    // *************************** Platform specific ************************************
#if defined(Q_OS_WIN)
    uint noPaintOnScreen : 1; // see qwidget.cpp ::paintEngine()
#elif defined(Q_OS_MAC)
    void macUpdateSizeAttribute();
#endif
    void setNetWmWindowTypes(bool skipIfMissing = false);

    bool stealKeyboardGrab(bool grab);
    bool stealMouseGrab(bool grab);
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QWidgetPrivate::DrawWidgetFlags)

struct QWidgetPaintContext
{
    inline QWidgetPaintContext(QPaintDevice *d, const QRegion &r, const QPoint &o, QWidgetPrivate::DrawWidgetFlags f,
                               QPainter *p, QWidgetRepaintManager *rpm)
        : pdev(d), rgn(r), offset(o), flags(f), sharedPainter(p), repaintManager(rpm), painter(nullptr) {}

    QPaintDevice *pdev;
    QRegion rgn;
    QPoint offset;
    QWidgetPrivate::DrawWidgetFlags flags;
    QPainter *sharedPainter;
    QWidgetRepaintManager *repaintManager;
    QPainter *painter;
};

#if QT_CONFIG(graphicseffect)
class QWidgetEffectSourcePrivate : public QGraphicsEffectSourcePrivate
{
public:
    QWidgetEffectSourcePrivate(QWidget *widget)
        : QGraphicsEffectSourcePrivate(), m_widget(widget), context(nullptr), updateDueToGraphicsEffect(false)
    {}

    void detach() override
    { m_widget->d_func()->graphicsEffect = nullptr; }

    const QGraphicsItem *graphicsItem() const override
    { return nullptr; }

    const QWidget *widget() const override
    { return m_widget; }

    void update() override
    {
        updateDueToGraphicsEffect = true;
        m_widget->update();
        updateDueToGraphicsEffect = false;
    }

    bool isPixmap() const override
    { return false; }

    void effectBoundingRectChanged() override
    {
        // ### This function should take a rect parameter; then we can avoid
        // updating too much on the parent widget.
        if (QWidget *parent = m_widget->parentWidget())
            parent->update();
        else
            update();
    }

    const QStyleOption *styleOption() const override
    { return nullptr; }

    QRect deviceRect() const override
    { return m_widget->window()->rect(); }

    QRectF boundingRect(Qt::CoordinateSystem system) const override;
    void draw(QPainter *p) override;
    QPixmap pixmap(Qt::CoordinateSystem system, QPoint *offset,
                   QGraphicsEffect::PixmapPadMode mode) const override;

    QWidget *m_widget;
    QWidgetPaintContext *context;
    QTransform lastEffectTransform;
    bool updateDueToGraphicsEffect;
};
#endif // QT_CONFIG(graphicseffect)

inline QWExtra *QWidgetPrivate::extraData() const
{
    return extra.get();
}

inline QTLWExtra *QWidgetPrivate::topData() const
{
    const_cast<QWidgetPrivate *>(this)->createTLExtra();
    return extra->topextra.get();
}

inline QTLWExtra *QWidgetPrivate::maybeTopData() const
{
    return extra ? extra->topextra.get() : nullptr;
}

inline QPainter *QWidgetPrivate::sharedPainter() const
{
    Q_Q(const QWidget);
    QTLWExtra *x = q->window()->d_func()->maybeTopData();
    return x ? x->sharedPainter : nullptr;
}

inline void QWidgetPrivate::setSharedPainter(QPainter *painter)
{
    Q_Q(QWidget);
    QTLWExtra *x = q->window()->d_func()->topData();
    x->sharedPainter = painter;
}

inline bool QWidgetPrivate::pointInsideRectAndMask(const QPoint &p) const
{
    Q_Q(const QWidget);
    return q->rect().contains(p) && (!extra || !extra->hasMask || q->testAttribute(Qt::WA_MouseNoMask)
                                     || extra->mask.contains(p));
}

inline QWidgetRepaintManager *QWidgetPrivate::maybeRepaintManager() const
{
    Q_Q(const QWidget);
    QTLWExtra *x = q->window()->d_func()->maybeTopData();
    return x ? x->repaintManager.get() : nullptr;
}

QT_END_NAMESPACE

#endif // QWIDGET_P_H