/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtGui module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** This file may be used under the terms of the GNU Lesser General Public | |
** License version 2.1 as published by the Free Software Foundation and | |
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** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
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** | |
** In addition, as a special exception, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia Qt 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: | |
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** | |
** Other Usage | |
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** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#include "qglobal.h" | |
#ifndef QT_NO_GRAPHICSVIEW | |
#include "qgraphicslayout_p.h" | |
#include "qgraphicslayout.h" | |
#include "qgraphicswidget.h" | |
#include "qapplication.h" | |
QT_BEGIN_NAMESPACE | |
/*! | |
\internal | |
\a mw is the new parent. all items in the layout will be a child of \a mw. | |
*/ | |
void QGraphicsLayoutPrivate::reparentChildItems(QGraphicsItem *newParent) | |
{ | |
Q_Q(QGraphicsLayout); | |
int n = q->count(); | |
//bool mwVisible = mw && mw->isVisible(); | |
for (int i = 0; i < n; ++i) { | |
QGraphicsLayoutItem *layoutChild = q->itemAt(i); | |
if (!layoutChild) { | |
// Skip stretch items | |
continue; | |
} | |
if (layoutChild->isLayout()) { | |
QGraphicsLayout *l = static_cast<QGraphicsLayout*>(layoutChild); | |
l->d_func()->reparentChildItems(newParent); | |
} else if (QGraphicsItem *itemChild = layoutChild->graphicsItem()){ | |
QGraphicsItem *childParent = itemChild->parentItem(); | |
#ifdef QT_DEBUG | |
if (childParent && childParent != newParent && itemChild->isWidget() && qt_graphicsLayoutDebug()) { | |
QGraphicsWidget *w = static_cast<QGraphicsWidget*>(layoutChild); | |
qWarning("QGraphicsLayout::addChildLayout: widget %s \"%s\" in wrong parent; moved to correct parent", | |
w->metaObject()->className(), w->objectName().toLocal8Bit().constData()); | |
} | |
#endif | |
if (childParent != newParent) | |
itemChild->setParentItem(newParent); | |
} | |
} | |
} | |
void QGraphicsLayoutPrivate::getMargin(qreal *result, qreal userMargin, QStyle::PixelMetric pm) const | |
{ | |
if (!result) | |
return; | |
Q_Q(const QGraphicsLayout); | |
QGraphicsLayoutItem *parent = q->parentLayoutItem(); | |
if (userMargin >= 0.0) { | |
*result = userMargin; | |
} else if (!parent) { | |
*result = 0.0; | |
} else if (parent->isLayout()) { // sublayouts have 0 margin by default | |
*result = 0.0; | |
} else { | |
*result = 0.0; | |
if (QGraphicsItem *layoutParentItem = parentItem()) { | |
if (layoutParentItem->isWidget()) | |
*result = (qreal)static_cast<QGraphicsWidget*>(layoutParentItem)->style()->pixelMetric(pm, 0); | |
} | |
} | |
} | |
Qt::LayoutDirection QGraphicsLayoutPrivate::visualDirection() const | |
{ | |
if (QGraphicsItem *maybeWidget = parentItem()) { | |
if (maybeWidget->isWidget()) | |
return static_cast<QGraphicsWidget*>(maybeWidget)->layoutDirection(); | |
} | |
return QApplication::layoutDirection(); | |
} | |
static bool removeLayoutItemFromLayout(QGraphicsLayout *lay, QGraphicsLayoutItem *layoutItem) | |
{ | |
if (!lay) | |
return false; | |
for (int i = lay->count() - 1; i >= 0; --i) { | |
QGraphicsLayoutItem *child = lay->itemAt(i); | |
if (child && child->isLayout()) { | |
if (removeLayoutItemFromLayout(static_cast<QGraphicsLayout*>(child), layoutItem)) | |
return true; | |
} else if (child == layoutItem) { | |
lay->removeAt(i); | |
return true; | |
} | |
} | |
return false; | |
} | |
/*! | |
\internal | |
This function is called from subclasses to add a layout item \a layoutItem | |
to a layout. | |
It takes care of automatically reparenting graphics items, if needed. | |
If \a layoutItem is a is already in a layout, it will remove it from that layout. | |
*/ | |
void QGraphicsLayoutPrivate::addChildLayoutItem(QGraphicsLayoutItem *layoutItem) | |
{ | |
Q_Q(QGraphicsLayout); | |
if (QGraphicsLayoutItem *maybeLayout = layoutItem->parentLayoutItem()) { | |
if (maybeLayout->isLayout()) | |
removeLayoutItemFromLayout(static_cast<QGraphicsLayout*>(maybeLayout), layoutItem); | |
} | |
layoutItem->setParentLayoutItem(q); | |
if (layoutItem->isLayout()) { | |
if (QGraphicsItem *parItem = parentItem()) { | |
static_cast<QGraphicsLayout*>(layoutItem)->d_func()->reparentChildItems(parItem); | |
} | |
} else { | |
if (QGraphicsItem *item = layoutItem->graphicsItem()) { | |
QGraphicsItem *newParent = parentItem(); | |
QGraphicsItem *oldParent = item->parentItem(); | |
if (oldParent == newParent || !newParent) | |
return; | |
#ifdef QT_DEBUG | |
if (oldParent && item->isWidget()) { | |
QGraphicsWidget *w = static_cast<QGraphicsWidget*>(item); | |
qWarning("QGraphicsLayout::addChildLayoutItem: %s \"%s\" in wrong parent; moved to correct parent", | |
w->metaObject()->className(), w->objectName().toLocal8Bit().constData()); | |
} | |
#endif | |
item->setParentItem(newParent); | |
} | |
} | |
} | |
void QGraphicsLayoutPrivate::activateRecursive(QGraphicsLayoutItem *item) | |
{ | |
if (item->isLayout()) { | |
QGraphicsLayout *layout = static_cast<QGraphicsLayout *>(item); | |
if (layout->d_func()->activated) { | |
if (QGraphicsLayout::instantInvalidatePropagation()) { | |
return; | |
} else { | |
layout->invalidate(); // ### LOOKS SUSPICIOUSLY WRONG!!??? | |
} | |
} | |
for (int i = layout->count() - 1; i >= 0; --i) { | |
QGraphicsLayoutItem *childItem = layout->itemAt(i); | |
if (childItem) | |
activateRecursive(childItem); | |
} | |
layout->d_func()->activated = true; | |
} | |
} | |
QT_END_NAMESPACE | |
#endif //QT_NO_GRAPHICSVIEW |