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katie/src/gui/graphicsview/qgraphicsitem_p.h
Ivailo Monev bfbc380756 initial import 
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
2015-12-10 05:06:13 +02:00

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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGRAPHICSITEM_P_H
#define QGRAPHICSITEM_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qgraphicsitem.h"
#include "qset.h"
#include "qpixmapcache.h"
#include <qgraphicsview_p.h>
#include "qgraphicstransform.h"
#include <qgraphicstransform_p.h>
#include <qgraphicseffect_p.h>
#include <qgraphicseffect.h>
#include <QtCore/qpoint.h>
#ifndef QT_NO_GRAPHICSVIEW
QT_BEGIN_NAMESPACE
class QGraphicsItemPrivate;
#ifndef QDECLARATIVELISTPROPERTY
#define QDECLARATIVELISTPROPERTY
template<typename T>
class QDeclarativeListProperty {
public:
typedef void (*AppendFunction)(QDeclarativeListProperty<T> *, T*);
typedef int (*CountFunction)(QDeclarativeListProperty<T> *);
typedef T *(*AtFunction)(QDeclarativeListProperty<T> *, int);
typedef void (*ClearFunction)(QDeclarativeListProperty<T> *);
QDeclarativeListProperty()
: object(0), data(0), append(0), count(0), at(0), clear(0), dummy1(0), dummy2(0) {}
QDeclarativeListProperty(QObject *o, QList<T *> &list)
: object(o), data(&list), append(qlist_append), count(qlist_count), at(qlist_at),
clear(qlist_clear), dummy1(0), dummy2(0) {}
QDeclarativeListProperty(QObject *o, void *d, AppendFunction a, CountFunction c = 0, AtFunction t = 0,
ClearFunction r = 0)
: object(o), data(d), append(a), count(c), at(t), clear(r), dummy1(0), dummy2(0) {}
bool operator==(const QDeclarativeListProperty &o) const {
return object == o.object &&
data == o.data &&
append == o.append &&
count == o.count &&
at == o.at &&
clear == o.clear;
}
QObject *object;
void *data;
AppendFunction append;
CountFunction count;
AtFunction at;
ClearFunction clear;
void *dummy1;
void *dummy2;
private:
static void qlist_append(QDeclarativeListProperty *p, T *v) {
((QList<T *> *)p->data)->append(v);
}
static int qlist_count(QDeclarativeListProperty *p) {
return ((QList<T *> *)p->data)->count();
}
static T *qlist_at(QDeclarativeListProperty *p, int idx) {
return ((QList<T *> *)p->data)->at(idx);
}
static void qlist_clear(QDeclarativeListProperty *p) {
return ((QList<T *> *)p->data)->clear();
}
};
#endif
class QGraphicsItemCache
{
public:
QGraphicsItemCache() : allExposed(false) { }
// ItemCoordinateCache only
QRect boundingRect;
QSize fixedSize;
QPixmapCache::Key key;
// DeviceCoordinateCache only
struct DeviceData {
DeviceData() {}
QTransform lastTransform;
QPoint cacheIndent;
QPixmapCache::Key key;
};
QMap<QPaintDevice *, DeviceData> deviceData;
// List of logical exposed rects
QVector<QRectF> exposed;
bool allExposed;
// Empty cache
void purge();
};
class Q_GUI_EXPORT QGraphicsItemPrivate
{
Q_DECLARE_PUBLIC(QGraphicsItem)
public:
enum Extra {
ExtraToolTip,
ExtraCursor,
ExtraCacheData,
ExtraMaxDeviceCoordCacheSize,
ExtraBoundingRegionGranularity
};
enum AncestorFlag {
NoFlag = 0,
AncestorHandlesChildEvents = 0x1,
AncestorClipsChildren = 0x2,
AncestorIgnoresTransformations = 0x4,
AncestorFiltersChildEvents = 0x8
};
inline QGraphicsItemPrivate()
: z(0),
opacity(1.),
scene(0),
parent(0),
transformData(0),
graphicsEffect(0),
index(-1),
siblingIndex(-1),
itemDepth(-1),
focusProxy(0),
subFocusItem(0),
focusScopeItem(0),
imHints(Qt::ImhNone),
panelModality(QGraphicsItem::NonModal),
acceptedMouseButtons(0x1f),
visible(1),
explicitlyHidden(0),
enabled(1),
explicitlyDisabled(0),
selected(0),
acceptsHover(0),
acceptDrops(0),
isMemberOfGroup(0),
handlesChildEvents(0),
itemDiscovered(0),
hasCursor(0),
ancestorFlags(0),
cacheMode(0),
hasBoundingRegionGranularity(0),
isWidget(0),
dirty(0),
dirtyChildren(0),
localCollisionHack(0),
inSetPosHelper(0),
needSortChildren(0),
allChildrenDirty(0),
fullUpdatePending(0),
dirtyChildrenBoundingRect(1),
flags(0),
paintedViewBoundingRectsNeedRepaint(0),
dirtySceneTransform(1),
geometryChanged(1),
inDestructor(0),
isObject(0),
ignoreVisible(0),
ignoreOpacity(0),
acceptTouchEvents(0),
acceptedTouchBeginEvent(0),
filtersDescendantEvents(0),
sceneTransformTranslateOnly(0),
notifyBoundingRectChanged(0),
notifyInvalidated(0),
mouseSetsFocus(1),
explicitActivate(0),
wantsActive(0),
holesInSiblingIndex(0),
sequentialOrdering(1),
updateDueToGraphicsEffect(0),
scenePosDescendants(0),
pendingPolish(0),
mayHaveChildWithGraphicsEffect(0),
isDeclarativeItem(0),
sendParentChangeNotification(0),
globalStackingOrder(-1),
q_ptr(0)
{
}
inline virtual ~QGraphicsItemPrivate()
{ }
static const QGraphicsItemPrivate *get(const QGraphicsItem *item)
{
return item->d_ptr.data();
}
static QGraphicsItemPrivate *get(QGraphicsItem *item)
{
return item->d_ptr.data();
}
void updateChildWithGraphicsEffectFlagRecursively();
void updateAncestorFlag(QGraphicsItem::GraphicsItemFlag childFlag,
AncestorFlag flag = NoFlag, bool enabled = false, bool root = true);
void updateAncestorFlags();
void setIsMemberOfGroup(bool enabled);
void remapItemPos(QEvent *event, QGraphicsItem *item);
QPointF genericMapFromScene(const QPointF &pos, const QWidget *viewport) const;
inline bool itemIsUntransformable() const
{
return (flags & QGraphicsItem::ItemIgnoresTransformations)
|| (ancestorFlags & AncestorIgnoresTransformations);
}
void combineTransformToParent(QTransform *x, const QTransform *viewTransform = 0) const;
void combineTransformFromParent(QTransform *x, const QTransform *viewTransform = 0) const;
virtual void updateSceneTransformFromParent();
static bool movableAncestorIsSelected(const QGraphicsItem *item);
virtual void setPosHelper(const QPointF &pos);
void setTransformHelper(const QTransform &transform);
void prependGraphicsTransform(QGraphicsTransform *t);
void appendGraphicsTransform(QGraphicsTransform *t);
void setVisibleHelper(bool newVisible, bool explicitly, bool update = true);
void setEnabledHelper(bool newEnabled, bool explicitly, bool update = true);
bool discardUpdateRequest(bool ignoreVisibleBit = false,
bool ignoreDirtyBit = false, bool ignoreOpacity = false) const;
virtual void transformChanged() {}
int depth() const;
#ifndef QT_NO_GRAPHICSEFFECT
enum InvalidateReason {
OpacityChanged
};
void invalidateParentGraphicsEffectsRecursively();
void invalidateChildGraphicsEffectsRecursively(InvalidateReason reason);
#endif //QT_NO_GRAPHICSEFFECT
void invalidateDepthRecursively();
void resolveDepth();
void addChild(QGraphicsItem *child);
void removeChild(QGraphicsItem *child);
QDeclarativeListProperty<QGraphicsObject> childrenList();
void setParentItemHelper(QGraphicsItem *parent, const QVariant *newParentVariant,
const QVariant *thisPointerVariant);
void childrenBoundingRectHelper(QTransform *x, QRectF *rect, QGraphicsItem *topMostEffectItem);
void initStyleOption(QStyleOptionGraphicsItem *option, const QTransform &worldTransform,
const QRegion &exposedRegion, bool allItems = false) const;
QRectF effectiveBoundingRect(QGraphicsItem *topMostEffectItem = 0) const;
QRectF sceneEffectiveBoundingRect() const;
QRectF effectiveBoundingRect(const QRectF &rect) const;
virtual void resolveFont(uint inheritedMask)
{
for (int i = 0; i < children.size(); ++i)
children.at(i)->d_ptr->resolveFont(inheritedMask);
}
virtual void resolvePalette(uint inheritedMask)
{
for (int i = 0; i < children.size(); ++i)
children.at(i)->d_ptr->resolveFont(inheritedMask);
}
virtual bool isProxyWidget() const;
inline QVariant extra(Extra type) const
{
for (int i = 0; i < extras.size(); ++i) {
const ExtraStruct &extra = extras.at(i);
if (extra.type == type)
return extra.value;
}
return QVariant();
}
inline void setExtra(Extra type, const QVariant &value)
{
int index = -1;
for (int i = 0; i < extras.size(); ++i) {
if (extras.at(i).type == type) {
index = i;
break;
}
}
if (index == -1) {
extras << ExtraStruct(type, value);
} else {
extras[index].value = value;
}
}
inline void unsetExtra(Extra type)
{
for (int i = 0; i < extras.size(); ++i) {
if (extras.at(i).type == type) {
extras.removeAt(i);
return;
}
}
}
struct ExtraStruct {
ExtraStruct(Extra type, QVariant value)
: type(type), value(value)
{ }
Extra type;
QVariant value;
bool operator<(Extra extra) const
{ return type < extra; }
};
QList<ExtraStruct> extras;
QGraphicsItemCache *maybeExtraItemCache() const;
QGraphicsItemCache *extraItemCache() const;
void removeExtraItemCache();
void updatePaintedViewBoundingRects(bool updateChildren);
void ensureSceneTransformRecursive(QGraphicsItem **topMostDirtyItem);
inline void ensureSceneTransform()
{
QGraphicsItem *that = q_func();
ensureSceneTransformRecursive(&that);
}
inline bool hasTranslateOnlySceneTransform()
{
ensureSceneTransform();
return sceneTransformTranslateOnly;
}
inline void invalidateChildrenSceneTransform()
{
for (int i = 0; i < children.size(); ++i)
children.at(i)->d_ptr->dirtySceneTransform = 1;
}
inline qreal calcEffectiveOpacity() const
{
qreal o = opacity;
QGraphicsItem *p = parent;
int myFlags = flags;
while (p) {
int parentFlags = p->d_ptr->flags;
// If I have a parent, and I don't ignore my parent's opacity, and my
// parent propagates to me, then combine my local opacity with my parent's
// effective opacity into my effective opacity.
if ((myFlags & QGraphicsItem::ItemIgnoresParentOpacity)
|| (parentFlags & QGraphicsItem::ItemDoesntPropagateOpacityToChildren)) {
break;
}
o *= p->d_ptr->opacity;
p = p->d_ptr->parent;
myFlags = parentFlags;
}
return o;
}
inline bool isOpacityNull() const
{ return (opacity < qreal(0.001)); }
static inline bool isOpacityNull(qreal opacity)
{ return (opacity < qreal(0.001)); }
inline bool isFullyTransparent() const
{
if (isOpacityNull())
return true;
if (!parent)
return false;
return isOpacityNull(calcEffectiveOpacity());
}
inline qreal effectiveOpacity() const {
if (!parent || !opacity)
return opacity;
return calcEffectiveOpacity();
}
inline qreal combineOpacityFromParent(qreal parentOpacity) const
{
if (parent && !(flags & QGraphicsItem::ItemIgnoresParentOpacity)
&& !(parent->d_ptr->flags & QGraphicsItem::ItemDoesntPropagateOpacityToChildren)) {
return parentOpacity * opacity;
}
return opacity;
}
inline bool childrenCombineOpacity() const
{
if (!children.size())
return true;
if (flags & QGraphicsItem::ItemDoesntPropagateOpacityToChildren)
return false;
for (int i = 0; i < children.size(); ++i) {
if (children.at(i)->d_ptr->flags & QGraphicsItem::ItemIgnoresParentOpacity)
return false;
}
return true;
}
inline bool childrenClippedToShape() const
{ return (flags & QGraphicsItem::ItemClipsChildrenToShape) || children.isEmpty(); }
inline bool isInvisible() const
{
return !visible || (childrenCombineOpacity() && isFullyTransparent());
}
inline void markParentDirty(bool updateBoundingRect = false);
void setFocusHelper(Qt::FocusReason focusReason, bool climb, bool focusFromHide);
void clearFocusHelper(bool giveFocusToParent);
void setSubFocus(QGraphicsItem *rootItem = 0, QGraphicsItem *stopItem = 0);
void clearSubFocus(QGraphicsItem *rootItem = 0, QGraphicsItem *stopItem = 0);
void resetFocusProxy();
virtual void subFocusItemChange();
virtual void focusScopeItemChange(bool isSubFocusItem);
static void children_append(QDeclarativeListProperty<QGraphicsObject> *list, QGraphicsObject *item);
static int children_count(QDeclarativeListProperty<QGraphicsObject> *list);
static QGraphicsObject *children_at(QDeclarativeListProperty<QGraphicsObject> *list, int);
static void children_clear(QDeclarativeListProperty<QGraphicsObject> *list);
inline QTransform transformToParent() const;
inline void ensureSortedChildren();
static inline bool insertionOrder(QGraphicsItem *a, QGraphicsItem *b);
void ensureSequentialSiblingIndex();
inline void sendScenePosChange();
virtual void siblingOrderChange();
// Private Properties
virtual qreal width() const;
virtual void setWidth(qreal);
virtual void resetWidth();
virtual qreal height() const;
virtual void setHeight(qreal);
virtual void resetHeight();
QRectF childrenBoundingRect;
QRectF needsRepaint;
QMap<QWidget *, QRect> paintedViewBoundingRects;
QPointF pos;
qreal z;
qreal opacity;
QGraphicsScene *scene;
QGraphicsItem *parent;
QList<QGraphicsItem *> children;
struct TransformData;
TransformData *transformData;
QGraphicsEffect *graphicsEffect;
QTransform sceneTransform;
int index;
int siblingIndex;
int itemDepth; // Lazily calculated when calling depth().
QGraphicsItem *focusProxy;
QList<QGraphicsItem **> focusProxyRefs;
QGraphicsItem *subFocusItem;
QGraphicsItem *focusScopeItem;
Qt::InputMethodHints imHints;
QGraphicsItem::PanelModality panelModality;
#ifndef QT_NO_GESTURES
QMap<Qt::GestureType, Qt::GestureFlags> gestureContext;
#endif
// Packed 32 bits
quint32 acceptedMouseButtons : 5;
quint32 visible : 1;
quint32 explicitlyHidden : 1;
quint32 enabled : 1;
quint32 explicitlyDisabled : 1;
quint32 selected : 1;
quint32 acceptsHover : 1;
quint32 acceptDrops : 1;
quint32 isMemberOfGroup : 1;
quint32 handlesChildEvents : 1;
quint32 itemDiscovered : 1;
quint32 hasCursor : 1;
quint32 ancestorFlags : 4;
quint32 cacheMode : 2;
quint32 hasBoundingRegionGranularity : 1;
quint32 isWidget : 1;
quint32 dirty : 1;
quint32 dirtyChildren : 1;
quint32 localCollisionHack : 1;
quint32 inSetPosHelper : 1;
quint32 needSortChildren : 1;
quint32 allChildrenDirty : 1;
quint32 fullUpdatePending : 1;
quint32 dirtyChildrenBoundingRect : 1;
// Packed 32 bits
quint32 flags : 19;
quint32 paintedViewBoundingRectsNeedRepaint : 1;
quint32 dirtySceneTransform : 1;
quint32 geometryChanged : 1;
quint32 inDestructor : 1;
quint32 isObject : 1;
quint32 ignoreVisible : 1;
quint32 ignoreOpacity : 1;
quint32 acceptTouchEvents : 1;
quint32 acceptedTouchBeginEvent : 1;
quint32 filtersDescendantEvents : 1;
quint32 sceneTransformTranslateOnly : 1;
quint32 notifyBoundingRectChanged : 1;
quint32 notifyInvalidated : 1;
// New 32 bits
quint32 mouseSetsFocus : 1;
quint32 explicitActivate : 1;
quint32 wantsActive : 1;
quint32 holesInSiblingIndex : 1;
quint32 sequentialOrdering : 1;
quint32 updateDueToGraphicsEffect : 1;
quint32 scenePosDescendants : 1;
quint32 pendingPolish : 1;
quint32 mayHaveChildWithGraphicsEffect : 1;
quint32 isDeclarativeItem : 1;
quint32 sendParentChangeNotification : 1;
quint32 padding : 21;
// Optional stacking order
int globalStackingOrder;
QGraphicsItem *q_ptr;
};
struct QGraphicsItemPrivate::TransformData
{
QTransform transform;
qreal scale;
qreal rotation;
qreal xOrigin;
qreal yOrigin;
QList<QGraphicsTransform *> graphicsTransforms;
bool onlyTransform;
TransformData() :
scale(1.0), rotation(0.0),
xOrigin(0.0), yOrigin(0.0),
onlyTransform(true)
{ }
QTransform computedFullTransform(QTransform *postmultiplyTransform = 0) const
{
if (onlyTransform) {
if (!postmultiplyTransform || postmultiplyTransform->isIdentity())
return transform;
if (transform.isIdentity())
return *postmultiplyTransform;
return transform * *postmultiplyTransform;
}
QTransform x(transform);
if (!graphicsTransforms.isEmpty()) {
QMatrix4x4 m;
for (int i = 0; i < graphicsTransforms.size(); ++i)
graphicsTransforms.at(i)->applyTo(&m);
x *= m.toTransform();
}
x.translate(xOrigin, yOrigin);
x.rotate(rotation);
x.scale(scale, scale);
x.translate(-xOrigin, -yOrigin);
if (postmultiplyTransform)
x *= *postmultiplyTransform;
return x;
}
};
struct QGraphicsItemPaintInfo
{
inline QGraphicsItemPaintInfo(const QTransform *const xform1, const QTransform *const xform2,
const QTransform *const xform3,
QRegion *r, QWidget *w, QStyleOptionGraphicsItem *opt,
QPainter *p, qreal o, bool b1, bool b2)
: viewTransform(xform1), transformPtr(xform2), effectTransform(xform3), exposedRegion(r), widget(w),
option(opt), painter(p), opacity(o), wasDirtySceneTransform(b1), drawItem(b2)
{}
const QTransform *viewTransform;
const QTransform *transformPtr;
const QTransform *effectTransform;
QRegion *exposedRegion;
QWidget *widget;
QStyleOptionGraphicsItem *option;
QPainter *painter;
qreal opacity;
quint32 wasDirtySceneTransform : 1;
quint32 drawItem : 1;
};
#ifndef QT_NO_GRAPHICSEFFECT
class QGraphicsItemEffectSourcePrivate : public QGraphicsEffectSourcePrivate
{
public:
QGraphicsItemEffectSourcePrivate(QGraphicsItem *i)
: QGraphicsEffectSourcePrivate(), item(i), info(0)
{}
inline void detach()
{
item->d_ptr->graphicsEffect = 0;
item->prepareGeometryChange();
}
inline const QGraphicsItem *graphicsItem() const
{ return item; }
inline const QWidget *widget() const
{ return 0; }
inline void update() {
item->d_ptr->updateDueToGraphicsEffect = true;
item->update();
item->d_ptr->updateDueToGraphicsEffect = false;
}
inline void effectBoundingRectChanged()
{ item->prepareGeometryChange(); }
inline bool isPixmap() const
{
return item->type() == QGraphicsPixmapItem::Type
&& !(item->flags() & QGraphicsItem::ItemIsSelectable)
&& item->d_ptr->children.size() == 0;
//|| (item->d_ptr->isObject && qobject_cast<QDeclarativeImage *>(q_func()));
}
inline const QStyleOption *styleOption() const
{ return info ? info->option : 0; }
inline QRect deviceRect() const
{
if (!info || !info->widget) {
qWarning("QGraphicsEffectSource::deviceRect: Not yet implemented, lacking device context");
return QRect();
}
return info->widget->rect();
}
QRectF boundingRect(Qt::CoordinateSystem system) const;
void draw(QPainter *);
QPixmap pixmap(Qt::CoordinateSystem system,
QPoint *offset,
QGraphicsEffect::PixmapPadMode mode) const;
QRect paddedEffectRect(Qt::CoordinateSystem system, QGraphicsEffect::PixmapPadMode mode, const QRectF &sourceRect, bool *unpadded = 0) const;
QGraphicsItem *item;
QGraphicsItemPaintInfo *info;
QTransform lastEffectTransform;
};
#endif //QT_NO_GRAPHICSEFFECT
/*!
Returns true if \a item1 is on top of \a item2.
The items don't need to be siblings.
\internal
*/
inline bool qt_closestItemFirst(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
// Siblings? Just check their z-values.
const QGraphicsItemPrivate *d1 = item1->d_ptr.data();
const QGraphicsItemPrivate *d2 = item2->d_ptr.data();
if (d1->parent == d2->parent)
return qt_closestLeaf(item1, item2);
// Find common ancestor, and each item's ancestor closest to the common
// ancestor.
int item1Depth = d1->depth();
int item2Depth = d2->depth();
const QGraphicsItem *p = item1;
const QGraphicsItem *t1 = item1;
while (item1Depth > item2Depth && (p = p->d_ptr->parent)) {
if (p == item2) {
// item2 is one of item1's ancestors; item1 is on top
return !(t1->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
}
t1 = p;
--item1Depth;
}
p = item2;
const QGraphicsItem *t2 = item2;
while (item2Depth > item1Depth && (p = p->d_ptr->parent)) {
if (p == item1) {
// item1 is one of item2's ancestors; item1 is not on top
return (t2->d_ptr->flags & QGraphicsItem::ItemStacksBehindParent);
}
t2 = p;
--item2Depth;
}
// item1Ancestor is now at the same level as item2Ancestor, but not the same.
const QGraphicsItem *p1 = t1;
const QGraphicsItem *p2 = t2;
while (t1 && t1 != t2) {
p1 = t1;
p2 = t2;
t1 = t1->d_ptr->parent;
t2 = t2->d_ptr->parent;
}
// in case we have a common ancestor, we compare the immediate children in the ancestor's path.
// otherwise we compare the respective items' topLevelItems directly.
return qt_closestLeaf(p1, p2);
}
/*!
Returns true if \a item2 is on top of \a item1.
The items don't need to be siblings.
\internal
*/
inline bool qt_closestItemLast(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
return qt_closestItemFirst(item2, item1);
}
/*!
\internal
*/
inline bool qt_closestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
// Return true if sibling item1 is on top of item2.
const QGraphicsItemPrivate *d1 = item1->d_ptr.data();
const QGraphicsItemPrivate *d2 = item2->d_ptr.data();
bool f1 = d1->flags & QGraphicsItem::ItemStacksBehindParent;
bool f2 = d2->flags & QGraphicsItem::ItemStacksBehindParent;
if (f1 != f2)
return f2;
if (d1->z != d2->z)
return d1->z > d2->z;
return d1->siblingIndex > d2->siblingIndex;
}
/*!
\internal
*/
inline bool qt_notclosestLeaf(const QGraphicsItem *item1, const QGraphicsItem *item2)
{ return qt_closestLeaf(item2, item1); }
/*
return the full transform of the item to the parent. This include the position and all the transform data
*/
inline QTransform QGraphicsItemPrivate::transformToParent() const
{
QTransform matrix;
combineTransformToParent(&matrix);
return matrix;
}
/*!
\internal
*/
inline void QGraphicsItemPrivate::ensureSortedChildren()
{
if (needSortChildren) {
needSortChildren = 0;
sequentialOrdering = 1;
if (children.isEmpty())
return;
qSort(children.begin(), children.end(), qt_notclosestLeaf);
for (int i = 0; i < children.size(); ++i) {
if (children.at(i)->d_ptr->siblingIndex != i) {
sequentialOrdering = 0;
break;
}
}
}
}
/*!
\internal
*/
inline bool QGraphicsItemPrivate::insertionOrder(QGraphicsItem *a, QGraphicsItem *b)
{
return a->d_ptr->siblingIndex < b->d_ptr->siblingIndex;
}
/*!
\internal
*/
inline void QGraphicsItemPrivate::markParentDirty(bool updateBoundingRect)
{
QGraphicsItemPrivate *parentp = this;
#ifndef QT_NO_GRAPHICSEFFECT
if (updateBoundingRect && parentp->graphicsEffect && !parentp->inSetPosHelper) {
parentp->notifyInvalidated = 1;
static_cast<QGraphicsItemEffectSourcePrivate *>(parentp->graphicsEffect->d_func()
->source->d_func())->invalidateCache();
}
#endif
while (parentp->parent) {
parentp = parentp->parent->d_ptr.data();
parentp->dirtyChildren = 1;
if (updateBoundingRect) {
parentp->dirtyChildrenBoundingRect = 1;
// ### Only do this if the parent's effect applies to the entire subtree.
parentp->notifyBoundingRectChanged = 1;
}
#ifndef QT_NO_GRAPHICSEFFECT
if (parentp->graphicsEffect) {
if (updateBoundingRect) {
static_cast<QGraphicsItemEffectSourcePrivate *>(parentp->graphicsEffect->d_func()
->source->d_func())->invalidateCache();
parentp->notifyInvalidated = 1;
}
if (parentp->scene && parentp->graphicsEffect->isEnabled()) {
parentp->dirty = 1;
parentp->fullUpdatePending = 1;
}
}
#endif
}
}
QT_END_NAMESPACE
#endif // QT_NO_GRAPHICSVIEW
#endif
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