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Diffstat (limited to 'src/quickcontrols2/qquicktumblerview.cpp')
| -rw-r--r-- | src/quickcontrols2/qquicktumblerview.cpp | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/src/quickcontrols2/qquicktumblerview.cpp b/src/quickcontrols2/qquicktumblerview.cpp deleted file mode 100644 index 911e2ae8..00000000 --- a/src/quickcontrols2/qquicktumblerview.cpp +++ /dev/null @@ -1,320 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2017 The Qt Company Ltd. -** Contact: http://www.qt.io/licensing/ -** -** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL3$ -** 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 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPLv3 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.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 later 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 2.0 requirements will be -** met: http://www.gnu.org/licenses/gpl-2.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquicktumblerview_p.h" - -#include <QtCore/qloggingcategory.h> -#include <QtQuick/private/qquickitem_p.h> -#include <QtQuick/private/qquicklistview_p.h> -#include <QtQuick/private/qquickpathview_p.h> - -#include <QtQuickTemplates2/private/qquicktumbler_p.h> -#include <QtQuickTemplates2/private/qquicktumbler_p_p.h> - -QT_BEGIN_NAMESPACE - -Q_LOGGING_CATEGORY(lcTumblerView, "qt.quick.controls.tumblerview") - -QQuickTumblerView::QQuickTumblerView(QQuickItem *parent) : - QQuickItem(parent) -{ - // We don't call createView() here because we don't know what the wrap flag is set to - // yet, and we don't want to create a view that might never get used. -} - -QVariant QQuickTumblerView::model() const -{ - return m_model; -} - -void QQuickTumblerView::setModel(const QVariant &model) -{ - qCDebug(lcTumblerView) << "setting model to:" << model << "on" - << (m_pathView ? static_cast<QObject*>(m_pathView) : static_cast<QObject*>(m_listView)); - if (model == m_model) - return; - - m_model = model; - - if (m_pathView) { - m_pathView->setModel(m_model); - } else if (m_listView) { - // QQuickItemView::setModel() resets the current index, - // but if we're still creating the Tumbler, it should be maintained. - const int oldCurrentIndex = m_listView->currentIndex(); - m_listView->setModel(m_model); - if (!isComponentComplete()) - m_listView->setCurrentIndex(oldCurrentIndex); - } - - emit modelChanged(); -} - -QQmlComponent *QQuickTumblerView::delegate() const -{ - return m_delegate; -} - -void QQuickTumblerView::setDelegate(QQmlComponent *delegate) -{ - qCDebug(lcTumblerView) << "setting delegate to:" << delegate << "on" - << (m_pathView ? static_cast<QObject*>(m_pathView) : static_cast<QObject*>(m_listView)); - if (delegate == m_delegate) - return; - - m_delegate = delegate; - - if (m_pathView) - m_pathView->setDelegate(m_delegate); - else if (m_listView) - m_listView->setDelegate(m_delegate); - - emit delegateChanged(); -} - -QQuickPath *QQuickTumblerView::path() const -{ - return m_path; -} - -void QQuickTumblerView::setPath(QQuickPath *path) -{ - if (path == m_path) - return; - - m_path = path; - emit pathChanged(); -} - -void QQuickTumblerView::createView() -{ - Q_ASSERT(m_tumbler); - - // We create a view regardless of whether or not we know - // the count yet, because we rely on the view to tell us the count. - if (m_tumbler->wrap()) { - if (m_listView) { - // It's necessary to call deleteLater() rather than delete, - // as this code is most likely being run in rensponse to a signal - // emission somewhere in the list view's internals, so we need to - // wait until that has finished. - m_listView->deleteLater(); - QQml_setParent_noEvent(m_listView, nullptr); - // The auto tests pass with unparenting the list view alone, but - // just to be sure, we unset some other things as well. - m_listView->setParentItem(nullptr); - m_listView->setVisible(false); - m_listView->setModel(QVariant()); - m_listView = nullptr; - } - - if (!m_pathView) { - qCDebug(lcTumblerView) << "creating PathView"; - - m_pathView = new QQuickPathView; - QQmlEngine::setContextForObject(m_pathView, qmlContext(this)); - QQml_setParent_noEvent(m_pathView, this); - m_pathView->setParentItem(this); - m_pathView->setPath(m_path); - m_pathView->setDelegate(m_delegate); - m_pathView->setPreferredHighlightBegin(0.5); - m_pathView->setPreferredHighlightEnd(0.5); - m_pathView->setHighlightMoveDuration(1000); - m_pathView->setClip(true); - - // Give the view a size. - updateView(); - // Set the model. - updateModel(); - - qCDebug(lcTumblerView) << "finished creating PathView"; - } - } else { - if (m_pathView) { - m_pathView->deleteLater(); - QQml_setParent_noEvent(m_pathView, nullptr); - m_pathView->setParentItem(nullptr); - m_pathView->setVisible(false); - m_pathView->setModel(QVariant()); - m_pathView = nullptr; - } - - if (!m_listView) { - qCDebug(lcTumblerView) << "creating ListView"; - - m_listView = new QQuickListView; - QQmlEngine::setContextForObject(m_listView, qmlContext(this)); - QQml_setParent_noEvent(m_listView, this); - m_listView->setParentItem(this); - m_listView->setSnapMode(QQuickListView::SnapToItem); - m_listView->setClip(true); - - // Give the view a size. - updateView(); - // Set the model. - updateModel(); - - // Set these after the model is set so that the currentItem animation - // happens instantly on startup/after switching models. If we set them too early, - // the view animates any potential currentIndex change over one second, - // which we don't want when the contentItem has just been created. - m_listView->setDelegate(m_delegate); - // Set this after setting the delegate to avoid unexpected currentIndex changes: QTBUG-79150 - m_listView->setHighlightRangeMode(QQuickListView::StrictlyEnforceRange); - m_listView->setHighlightMoveDuration(1000); - - qCDebug(lcTumblerView) << "finished creating ListView"; - } - } -} - -// Called whenever the size or visibleItemCount changes. -void QQuickTumblerView::updateView() -{ - QQuickItem *theView = view(); - if (!theView) - return; - - theView->setSize(QSizeF(width(), height())); - - // Can be called in geometryChange when it might not have a parent item yet. - if (!m_tumbler) - return; - - // Set view-specific properties that have a dependency on the size, etc. - if (m_pathView) { - m_pathView->setPathItemCount(m_tumbler->visibleItemCount() + 1); - m_pathView->setDragMargin(width() / 2); - } else { - m_listView->setPreferredHighlightBegin(height() / 2 - (height() / m_tumbler->visibleItemCount() / 2)); - m_listView->setPreferredHighlightEnd(height() / 2 + (height() / m_tumbler->visibleItemCount() / 2)); - } -} - -void QQuickTumblerView::updateModel() -{ - if (m_pathView && !m_pathView->model().isValid() && m_model.isValid()) { - // QQuickPathView::setPathItemCount() resets the offset animation, - // so we just skip the animation while constructing the view. - const int oldHighlightMoveDuration = m_pathView->highlightMoveDuration(); - m_pathView->setHighlightMoveDuration(0); - - // Setting model can change the count, which can affect the wrap, which can cause - // the current view to be deleted before setModel() is finished, which causes a crash. - // Since QQuickTumbler can't know about QQuickTumblerView, we use its private API to - // inform it that it should delay setting wrap. - QQuickTumblerPrivate *tumblerPrivate = QQuickTumblerPrivate::get(m_tumbler); - tumblerPrivate->beginSetModel(); - m_pathView->setModel(m_model); - tumblerPrivate->endSetModel(); - - // The count-depends-on-wrap behavior could cause wrap to change after - // the call above, so we must check that we're still using a PathView. - if (m_pathView) - m_pathView->setHighlightMoveDuration(oldHighlightMoveDuration); - } else if (m_listView && !m_listView->model().isValid() && m_model.isValid()) { - const int currentIndex = m_tumbler->currentIndex(); - QQuickTumblerPrivate *tumblerPrivate = QQuickTumblerPrivate::get(m_tumbler); - - // setModel() causes QQuickTumblerPrivate::_q_onViewCountChanged() to - // be called, which calls QQuickTumbler::setCurrentIndex(), - // which results in QQuickItemViewPrivate::createHighlightItem() being - // called. When the highlight item is created, - // QQuickTumblerPrivate::itemChildAdded() is notified and - // QQuickTumblerPrivate::_q_updateItemHeights() is called, which causes - // a geometry change in the item and createHighlight() is called again. - // However, since the highlight item hadn't been assigned yet in the - // previous call frame, the "if (highlight) { delete highlight; }" - // check doesn't succeed, so the item is never deleted. - // - // To avoid this, we tell QQuickTumblerPrivate to ignore signals while - // setting the model, and manually call _q_onViewCountChanged() to - // ensure the correct sequence of calls happens (_q_onViewCountChanged() - // has to be within the ignoreSignals scope, because it also generates - // recursion otherwise). - tumblerPrivate->ignoreSignals = true; - m_listView->setModel(m_model); - m_listView->setCurrentIndex(currentIndex); - - tumblerPrivate->_q_onViewCountChanged(); - tumblerPrivate->ignoreSignals = false; - } -} - -void QQuickTumblerView::geometryChange(const QRectF &newGeometry, const QRectF &oldGeometry) -{ - QQuickItem::geometryChange(newGeometry, oldGeometry); - updateView(); -} - -void QQuickTumblerView::componentComplete() -{ - QQuickItem::componentComplete(); - updateView(); -} - -void QQuickTumblerView::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data) -{ - QQuickItem::itemChange(change, data); - - if (change == QQuickItem::ItemParentHasChanged && data.item) { - if (m_tumbler) - m_tumbler->disconnect(this); - - m_tumbler = qobject_cast<QQuickTumbler*>(parentItem()); - - if (m_tumbler) { - // We assume that the parentChanged() signal of the tumbler will be emitted before its wrap property is set... - connect(m_tumbler, &QQuickTumbler::wrapChanged, this, &QQuickTumblerView::createView); - connect(m_tumbler, &QQuickTumbler::visibleItemCountChanged, this, &QQuickTumblerView::updateView); - } - } -} - -QQuickItem *QQuickTumblerView::view() -{ - if (!m_tumbler) - return nullptr; - - if (m_tumbler->wrap()) - return m_pathView; - - return m_listView; -} - -QT_END_NAMESPACE - -#include "moc_qquicktumblerview_p.cpp" |