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Diffstat (limited to 'tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractscrollarea.cpp')
| -rw-r--r-- | tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractscrollarea.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractscrollarea.cpp b/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractscrollarea.cpp new file mode 100644 index 0000000000..39847b8edb --- /dev/null +++ b/tests/benchmarks/widgets/graphicsview/functional/GraphicsViewBenchmark/widgets/abstractscrollarea.cpp @@ -0,0 +1,236 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:GPL-EXCEPT$ +** 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 General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** 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-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QGraphicsSceneResizeEvent> +#include <QGraphicsWidget> +#include <QDebug> +#include "abstractscrollarea.h" +#include "scrollbar.h" + +AbstractScrollArea::AbstractScrollArea(QGraphicsWidget *parent) + : GvbWidget(parent) + , m_viewport(0) + , m_horizontalScrollBar(0) + , m_verticalScrollBar(0) + , m_prevHorizontalValue(0.0) + , m_prevVerticalValue(0.0) +{ + setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); + setContentsMargins(0, 0, 0, 0); + + m_horizontalScrollBar = new ScrollBar(Qt::Horizontal, this); + m_horizontalScrollBar->hide(); + m_horizontalScrollBar->setContentsMargins(0, 0, 0, 0); + m_horizontalScrollBarPolicy = Qt::ScrollBarAsNeeded; + m_horizontalScrollBar->setZValue(zValue()+1); // Raise scroll bar to top + m_horizontalScrollBar->setVisible(false); + + connect(m_horizontalScrollBar, SIGNAL(sliderPositionChange(qreal)), + this, SLOT(horizontalScroll(qreal))); + connect(m_horizontalScrollBar, SIGNAL(sliderPressed()), + this, SLOT(horizontalScrollStart())); + + m_verticalScrollBar = new ScrollBar(Qt::Vertical, this); + m_verticalScrollBar->hide(); + m_verticalScrollBar->setContentsMargins(0, 0, 0, 0); + m_verticalScrollBarPolicy = Qt::ScrollBarAsNeeded; + m_verticalScrollBar->setZValue(zValue()+1); // Raise scroll bar to top + m_verticalScrollBar->setVisible(false); + + connect(m_verticalScrollBar, SIGNAL(sliderPositionChange(qreal)), + this, SLOT(verticalScroll(qreal))); + connect(m_verticalScrollBar, SIGNAL(sliderPressed()), + this, SLOT(verticalScrollStart())); + + QGraphicsWidget *viewport = new QGraphicsWidget; + setViewport(viewport); +} + +AbstractScrollArea::~AbstractScrollArea() +{ +} + +ScrollBar *AbstractScrollArea::verticalScrollBar() const +{ + return m_verticalScrollBar; +} + +ScrollBar *AbstractScrollArea::horizontalScrollBar() const +{ + return m_horizontalScrollBar; +} + +void AbstractScrollArea::setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy policy) +{ + m_horizontalScrollBarPolicy = policy; +} + +void AbstractScrollArea::setVerticalScrollBarPolicy(Qt::ScrollBarPolicy policy) +{ + m_verticalScrollBarPolicy = policy; +} + +Qt::ScrollBarPolicy AbstractScrollArea::verticalScrollBarPolicy() const +{ + return m_verticalScrollBarPolicy; +} + +Qt::ScrollBarPolicy AbstractScrollArea::horizontalScrollBarPolicy() const +{ + return m_horizontalScrollBarPolicy; +} + +QGraphicsWidget *AbstractScrollArea::viewport() const +{ + return m_viewport; +} + +void AbstractScrollArea::setViewport(QGraphicsWidget *viewport) +{ + if (m_viewport) { + m_viewport->setParentItem(0); + + QList<QGraphicsItem*> children = m_viewport->childItems(); + + foreach (QGraphicsItem *child, children) + child->setParentItem(0); + + delete m_viewport; + } + + m_viewport = viewport; + + if (viewport) { + + m_viewport->setParentItem(this); + m_viewport->setContentsMargins(0, 0, 0, 0); + + adjustScrollBars(); + } + + emit viewportChanged(viewport); +} + +bool AbstractScrollArea::event(QEvent *e) +{ + if (e->type() == QEvent::ApplicationLayoutDirectionChange + || e->type() == QEvent::LayoutDirectionChange) { + } else if (e->type() == QEvent::GraphicsSceneResize) { + QGraphicsSceneResizeEvent *event = + static_cast<QGraphicsSceneResizeEvent*>(e); + + QSizeF newSize = event->newSize(); + QRectF hrect = m_horizontalScrollBar->boundingRect(); + QRectF vrect = m_verticalScrollBar->boundingRect(); + + QSizeF vpSize = newSize; + + if (m_horizontalScrollBarPolicy != Qt::ScrollBarAlwaysOff) + vpSize.setHeight(newSize.height() - hrect.height()); + if (m_verticalScrollBarPolicy != Qt::ScrollBarAlwaysOff) + vpSize.setWidth(newSize.width() - vrect.width()); + + m_viewport->resize(vpSize); + + adjustScrollBars(); + } + + return QGraphicsWidget::event(e); +} + + +void AbstractScrollArea::scrollContentsBy(qreal dx, qreal dy) +{ + Q_UNUSED(dx) + Q_UNUSED(dy) + prepareGeometryChange(); +} + +void AbstractScrollArea::verticalScrollStart() +{ + m_prevVerticalValue = m_verticalScrollBar->sliderPosition(); +} + +void AbstractScrollArea::verticalScroll(qreal value) +{ + qreal dy = value - m_prevVerticalValue; + if (!qFuzzyCompare(dy,qreal(0.0))) { + scrollContentsBy(0.0, dy); + m_prevVerticalValue = value; + } +} + +void AbstractScrollArea::horizontalScrollStart() +{ + m_prevHorizontalValue = m_horizontalScrollBar->sliderPosition(); +} + +void AbstractScrollArea::horizontalScroll(qreal value) +{ + qreal dx = value - m_prevHorizontalValue; + if (!qFuzzyCompare(dx,qreal(0.0))) { + scrollContentsBy(dx, 0.0); + m_prevHorizontalValue = value; + } +} + +void AbstractScrollArea::adjustScrollBars() +{ + if (m_horizontalScrollBarPolicy == Qt::ScrollBarAlwaysOff) { + m_horizontalScrollBar->hide(); + } else { + m_horizontalScrollBar->show(); + + QRectF sbgeom = boundingRect(); + + sbgeom.setTop(sbgeom.bottom() - m_horizontalScrollBar->boundingRect().height()); + sbgeom.setRight(sbgeom.right() - m_verticalScrollBar->boundingRect().width()); + m_horizontalScrollBar->setGeometry(sbgeom); + } + + if (m_verticalScrollBarPolicy == Qt::ScrollBarAlwaysOff) { + m_verticalScrollBar->hide(); + QRectF sbgeom = boundingRect(); + sbgeom.setLeft(sbgeom.right()); + sbgeom.setBottom(sbgeom.bottom()); + m_verticalScrollBar->setGeometry(sbgeom); + } else { + m_verticalScrollBar->show(); + + QRectF sbgeom = boundingRect(); + + sbgeom.setLeft(sbgeom.right() - m_verticalScrollBar->boundingRect().width()); + if (m_horizontalScrollBarPolicy != Qt::ScrollBarAlwaysOff) + sbgeom.setBottom(sbgeom.bottom() - m_horizontalScrollBar->boundingRect().height()); + m_verticalScrollBar->setGeometry(sbgeom); + } +} + + + + |