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Diffstat (limited to 'src/controls/qquickabstractscrollbar.cpp')
| -rw-r--r-- | src/controls/qquickabstractscrollbar.cpp | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/src/controls/qquickabstractscrollbar.cpp b/src/controls/qquickabstractscrollbar.cpp new file mode 100644 index 00000000..09ccace6 --- /dev/null +++ b/src/controls/qquickabstractscrollbar.cpp @@ -0,0 +1,428 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Quick Controls 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 "qquickabstractscrollbar_p.h" +#include "qquickcontrol_p_p.h" + +#include <QtQuick/private/qquickflickable_p.h> +#include <QtQuick/private/qquickitemchangelistener_p.h> + +QT_BEGIN_NAMESPACE + +/*! + \qmltype ScrollBar + \inherits Control + \instantiates QQuickAbstractScrollBar + \inqmlmodule QtQuick.Controls + \ingroup indicators + \ingroup sliders + \brief A scroll bar. + + TODO +*/ + +class QQuickAbstractScrollBarPrivate : public QQuickControlPrivate +{ +public: + QQuickAbstractScrollBarPrivate() : size(0), position(0), offset(0), + active(false), pressed(false), moving(false), + orientation(Qt::Vertical), handle(Q_NULLPTR) { } + + static QQuickAbstractScrollBarPrivate *get(QQuickAbstractScrollBar *bar) + { + return bar->d_func(); + } + + qreal size; + qreal position; + qreal offset; + bool active; + bool pressed; + bool moving; + Qt::Orientation orientation; + QQuickItem *handle; +}; + +QQuickAbstractScrollBar::QQuickAbstractScrollBar(QQuickItem *parent) : + QQuickControl(*(new QQuickAbstractScrollBarPrivate), parent) +{ + setKeepMouseGrab(true); + setAcceptedMouseButtons(Qt::LeftButton); +} + +QQuickScrollBarAttached *QQuickAbstractScrollBar::qmlAttachedProperties(QObject *object) +{ + QQuickFlickable *flickable = qobject_cast<QQuickFlickable *>(object); + if (flickable) + return new QQuickScrollBarAttached(flickable); + + qWarning() << "ScrollBar must be attached to a Flickable" << object; + return Q_NULLPTR; +} + +/*! + \qmlproperty real QtQuickControls2::ScrollBar::size + + TODO +*/ +qreal QQuickAbstractScrollBar::size() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->size; +} + +void QQuickAbstractScrollBar::setSize(qreal size) +{ + Q_D(QQuickAbstractScrollBar); + if (!qFuzzyCompare(d->size, size)) { + d->size = size; + emit sizeChanged(); + } +} + +/*! + \qmlproperty real QtQuickControls2::ScrollBar::position + + TODO +*/ +qreal QQuickAbstractScrollBar::position() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->position; +} + +void QQuickAbstractScrollBar::setPosition(qreal position) +{ + Q_D(QQuickAbstractScrollBar); + if (!qFuzzyCompare(d->position, position)) { + d->position = position; + emit positionChanged(); + } +} + +/*! + \qmlproperty bool QtQuickControls2::ScrollBar::active + + TODO +*/ +bool QQuickAbstractScrollBar::isActive() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->active; +} + +void QQuickAbstractScrollBar::setActive(bool active) +{ + Q_D(QQuickAbstractScrollBar); + if (d->active != active) { + d->active = active; + emit activeChanged(); + } +} + +/*! + \qmlproperty bool QtQuickControls2::ScrollBar::pressed + + TODO +*/ +bool QQuickAbstractScrollBar::isPressed() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->pressed; +} + +void QQuickAbstractScrollBar::setPressed(bool pressed) +{ + Q_D(QQuickAbstractScrollBar); + if (d->pressed != pressed) { + d->pressed = pressed; + setActive(d->pressed || d->moving); + emit pressedChanged(); + } +} + +/*! + \qmlproperty enumeration QtQuickControls2::ScrollBar::orientation + + TODO +*/ +Qt::Orientation QQuickAbstractScrollBar::orientation() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->orientation; +} + +void QQuickAbstractScrollBar::setOrientation(Qt::Orientation orientation) +{ + Q_D(QQuickAbstractScrollBar); + if (d->orientation != orientation) { + d->orientation = orientation; + emit orientationChanged(); + } +} + +/*! + \qmlproperty Item QtQuickControls2::ScrollBar::handle + + TODO +*/ +QQuickItem *QQuickAbstractScrollBar::handle() const +{ + Q_D(const QQuickAbstractScrollBar); + return d->handle; +} + +void QQuickAbstractScrollBar::setHandle(QQuickItem *handle) +{ + Q_D(QQuickAbstractScrollBar); + if (d->handle != handle) { + delete d->handle; + d->handle = handle; + if (handle && !handle->parentItem()) + handle->setParentItem(this); + emit handleChanged(); + } +} + +void QQuickAbstractScrollBar::mousePressEvent(QMouseEvent *event) +{ + Q_D(QQuickAbstractScrollBar); + QQuickControl::mousePressEvent(event); + d->offset = positionAt(event->pos()) - d->position; + if (d->offset < 0 || d->offset > d->size) + d->offset = d->size / 2; + setPressed(true); + event->accept(); +} + +void QQuickAbstractScrollBar::mouseMoveEvent(QMouseEvent *event) +{ + Q_D(QQuickAbstractScrollBar); + QQuickControl::mouseMoveEvent(event); + setPosition(qBound(0.0, positionAt(event->pos()) - d->offset, 1.0 - d->size)); + event->accept(); +} + +void QQuickAbstractScrollBar::mouseReleaseEvent(QMouseEvent *event) +{ + Q_D(QQuickAbstractScrollBar); + QQuickControl::mouseReleaseEvent(event); + setPosition(qBound(0.0, positionAt(event->pos()) - d->offset, 1.0 - d->size)); + d->offset = 0.0; + setPressed(false); + event->accept(); +} + +qreal QQuickAbstractScrollBar::positionAt(const QPoint &point) const +{ + Q_D(const QQuickAbstractScrollBar); + if (d->orientation == Qt::Horizontal) + return point.x() / width(); + else + return point.y() / height(); +} + +class QQuickScrollBarAttachedPrivate : public QObjectPrivate, public QQuickItemChangeListener +{ +public: + QQuickScrollBarAttachedPrivate(QQuickFlickable *flickable) : flickable(flickable), horizontal(Q_NULLPTR), vertical(Q_NULLPTR) { } + + void activateHorizontal(); + void activateVertical(); + void scrollHorizontal(); + void scrollVertical(); + + void itemGeometryChanged(QQuickItem *item, const QRectF &newGeometry, const QRectF &oldGeometry) Q_DECL_OVERRIDE; + + QQuickFlickable *flickable; + QQuickAbstractScrollBar *horizontal; + QQuickAbstractScrollBar *vertical; +}; + +void QQuickScrollBarAttachedPrivate::activateHorizontal() +{ + QQuickAbstractScrollBarPrivate *p = QQuickAbstractScrollBarPrivate::get(horizontal); + p->moving = flickable->isMovingHorizontally(); + horizontal->setActive(p->moving || p->pressed); +} + +void QQuickScrollBarAttachedPrivate::activateVertical() +{ + QQuickAbstractScrollBarPrivate *p = QQuickAbstractScrollBarPrivate::get(vertical); + p->moving = flickable->isMovingVertically(); + vertical->setActive(p->moving || p->pressed); +} + +// TODO: QQuickFlickable::maxXYExtent() +class QQuickFriendlyFlickable : public QQuickFlickable +{ + friend class QQuickScrollBarAttachedPrivate; +}; + +void QQuickScrollBarAttachedPrivate::scrollHorizontal() +{ + QQuickFriendlyFlickable *f = reinterpret_cast<QQuickFriendlyFlickable *>(flickable); + + const qreal viewwidth = f->width(); + const qreal maxxextent = -f->maxXExtent() + f->minXExtent(); + qreal cx = horizontal->position() * (maxxextent + viewwidth) - f->minXExtent(); + if (!qIsNaN(cx) && !qFuzzyCompare(cx, flickable->contentX())) + flickable->setContentX(cx); +} + +void QQuickScrollBarAttachedPrivate::scrollVertical() +{ + QQuickFriendlyFlickable *f = reinterpret_cast<QQuickFriendlyFlickable *>(flickable); + + const qreal viewheight = f->height(); + const qreal maxyextent = -f->maxYExtent() + f->minYExtent(); + qreal cy = vertical->position() * (maxyextent + viewheight) - f->minYExtent(); + if (!qIsNaN(cy) && !qFuzzyCompare(cy, flickable->contentY())) + flickable->setContentY(cy); +} + +void QQuickScrollBarAttachedPrivate::itemGeometryChanged(QQuickItem *item, const QRectF &newGeometry, const QRectF &oldGeometry) +{ + Q_ASSERT(item == flickable); + if (horizontal) { + QQuickItemPrivate *p = QQuickItemPrivate::get(horizontal); + if (!p->widthValid || qFuzzyCompare(horizontal->width(), oldGeometry.width())) + horizontal->setWidth(newGeometry.width()); + if (qFuzzyIsNull(horizontal->y()) || qFuzzyCompare(horizontal->y(), oldGeometry.height() - horizontal->height())) + horizontal->setY(newGeometry.height() - horizontal->height()); + } + if (vertical) { + QQuickItemPrivate *p = QQuickItemPrivate::get(vertical); + if (!p->heightValid || qFuzzyCompare(vertical->height(), oldGeometry.height())) + vertical->setHeight(newGeometry.height()); + if (!p->isMirrored() && (qFuzzyIsNull(vertical->x()) || qFuzzyCompare(vertical->x(), oldGeometry.width() - vertical->width()))) + vertical->setX(newGeometry.width() - vertical->width()); + } +} + +QQuickScrollBarAttached::QQuickScrollBarAttached(QQuickFlickable *flickable) : + QObject(*(new QQuickScrollBarAttachedPrivate(flickable)), flickable) +{ + Q_D(QQuickScrollBarAttached); + QQuickItemPrivate *p = QQuickItemPrivate::get(flickable); + p->addItemChangeListener(d, QQuickItemPrivate::Geometry); +} + +QQuickAbstractScrollBar *QQuickScrollBarAttached::horizontal() const +{ + Q_D(const QQuickScrollBarAttached); + return d->horizontal; +} + +void QQuickScrollBarAttached::setHorizontal(QQuickAbstractScrollBar *horizontal) +{ + Q_D(QQuickScrollBarAttached); + if (d->horizontal != horizontal) { + if (d->horizontal) { + QObjectPrivate::disconnect(d->horizontal, &QQuickAbstractScrollBar::positionChanged, d, &QQuickScrollBarAttachedPrivate::scrollHorizontal); + QObjectPrivate::disconnect(d->flickable, &QQuickFlickable::movingHorizontallyChanged, d, &QQuickScrollBarAttachedPrivate::activateHorizontal); + + // TODO: export QQuickFlickableVisibleArea + QObject *area = d->flickable->property("visibleArea").value<QObject *>(); + disconnect(area, SIGNAL(widthRatioChanged(qreal)), d->horizontal, SLOT(setSize(qreal))); + disconnect(area, SIGNAL(xPositionChanged(qreal)), d->horizontal, SLOT(setPosition(qreal))); + } + + d->horizontal = horizontal; + + if (horizontal) { + if (!horizontal->parentItem()) + horizontal->setParentItem(d->flickable); + horizontal->setOrientation(Qt::Horizontal); + + QObjectPrivate::connect(horizontal, &QQuickAbstractScrollBar::positionChanged, d, &QQuickScrollBarAttachedPrivate::scrollHorizontal); + QObjectPrivate::connect(d->flickable, &QQuickFlickable::movingHorizontallyChanged, d, &QQuickScrollBarAttachedPrivate::activateHorizontal); + + // TODO: export QQuickFlickableVisibleArea + QObject *area = d->flickable->property("visibleArea").value<QObject *>(); + connect(area, SIGNAL(widthRatioChanged(qreal)), horizontal, SLOT(setSize(qreal))); + connect(area, SIGNAL(xPositionChanged(qreal)), horizontal, SLOT(setPosition(qreal))); + + horizontal->setSize(area->property("widthRatio").toReal()); + horizontal->setPosition(area->property("xPosition").toReal()); + } + emit horizontalChanged(); + } +} + +QQuickAbstractScrollBar *QQuickScrollBarAttached::vertical() const +{ + Q_D(const QQuickScrollBarAttached); + return d->vertical; +} + +void QQuickScrollBarAttached::setVertical(QQuickAbstractScrollBar *vertical) +{ + Q_D(QQuickScrollBarAttached); + if (d->vertical != vertical) { + if (d->vertical) { + QObjectPrivate::disconnect(d->vertical, &QQuickAbstractScrollBar::positionChanged, d, &QQuickScrollBarAttachedPrivate::scrollVertical); + QObjectPrivate::disconnect(d->flickable, &QQuickFlickable::movingVerticallyChanged, d, &QQuickScrollBarAttachedPrivate::activateVertical); + + // TODO: export QQuickFlickableVisibleArea + QObject *area = d->flickable->property("visibleArea").value<QObject *>(); + disconnect(area, SIGNAL(heightRatioChanged(qreal)), d->vertical, SLOT(setSize(qreal))); + disconnect(area, SIGNAL(yPositionChanged(qreal)), d->vertical, SLOT(setPosition(qreal))); + } + + d->vertical = vertical; + + if (vertical) { + if (!vertical->parentItem()) + vertical->setParentItem(d->flickable); + vertical->setOrientation(Qt::Vertical); + + QObjectPrivate::connect(vertical, &QQuickAbstractScrollBar::positionChanged, d, &QQuickScrollBarAttachedPrivate::scrollVertical); + QObjectPrivate::connect(d->flickable, &QQuickFlickable::movingVerticallyChanged, d, &QQuickScrollBarAttachedPrivate::activateVertical); + + // TODO: export QQuickFlickableVisibleArea + QObject *area = d->flickable->property("visibleArea").value<QObject *>(); + connect(area, SIGNAL(heightRatioChanged(qreal)), vertical, SLOT(setSize(qreal))); + connect(area, SIGNAL(yPositionChanged(qreal)), vertical, SLOT(setPosition(qreal))); + + vertical->setSize(area->property("heightRatio").toReal()); + vertical->setPosition(area->property("yPosition").toReal()); + } + emit verticalChanged(); + } +} + +QT_END_NAMESPACE |