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Diffstat (limited to 'src/quicktemplates/qquickcalendarmodel.cpp')
| -rw-r--r-- | src/quicktemplates/qquickcalendarmodel.cpp | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/src/quicktemplates/qquickcalendarmodel.cpp b/src/quicktemplates/qquickcalendarmodel.cpp new file mode 100644 index 0000000000..bb3e2a7796 --- /dev/null +++ b/src/quicktemplates/qquickcalendarmodel.cpp @@ -0,0 +1,228 @@ +// Copyright (C) 2021 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#include "qquickcalendarmodel_p.h" + +#include <QtCore/private/qabstractitemmodel_p.h> + +QT_BEGIN_NAMESPACE + +/*! + \qmltype CalendarModel + \inherits QAbstractListModel +//! \instantiates QQuickCalendarModel + \inqmlmodule QtQuick.Controls + \brief A calendar model. + + CalendarModel provides a way of creating a range of MonthGrid + instances. It is typically used as a model for a ListView that uses + MonthGrid as a delegate. + + \snippet qtquickcontrols-calendarmodel.qml 1 + + In addition to the \c index property, a list of model data roles + are available in the context of each delegate: + \table + \row \li \b model.month : int \li The number of the month + \row \li \b model.year : int \li The number of the year + \endtable + + \include zero-based-months.qdocinc + + \sa MonthGrid, Calendar +*/ + +class QQuickCalendarModelPrivate : public QAbstractItemModelPrivate +{ + Q_DECLARE_PUBLIC(QQuickCalendarModel) + +public: + QQuickCalendarModelPrivate() : complete(false), + from(1,1,1), to(275759, 9, 25), count(0) + { + } + + static int getCount(QDate from, QDate to); + + void populate(QDate from, QDate to, bool force = false); + + bool complete; + QDate from; + QDate to; + int count; +}; + +// Returns the number of months we need to display for both from and to to be shown, +// or zero if from is in a later month than to, or either is invalid. +int QQuickCalendarModelPrivate::getCount(QDate from, QDate to) +{ + if (!from.isValid() || !to.isValid()) + return 0; + + const QCalendar gregorian; + Q_ASSERT(gregorian.isGregorian()); + const QCalendar::YearMonthDay &f = gregorian.partsFromDate(from); + const QCalendar::YearMonthDay &t = gregorian.partsFromDate(to); + Q_ASSERT(f.isValid() && t.isValid()); // ... because from and to are valid. + if (f.year > t.year || (f.year == t.year && f.month > t.month)) + return 0; + + // Count from's month and every subsequent month until to's: + return 1 + t.month + 12 * (t.year - f.year) - f.month; +} + +void QQuickCalendarModelPrivate::populate(QDate f, QDate t, bool force) +{ + Q_Q(QQuickCalendarModel); + if (!force && f == from && t == to) + return; + + int c = getCount(from, to); + if (c != count) { + q->beginResetModel(); + count = c; + q->endResetModel(); + emit q->countChanged(); + } else { + emit q->dataChanged(q->index(0, 0), q->index(c - 1, 0)); + } +} + +QQuickCalendarModel::QQuickCalendarModel(QObject *parent) : + QAbstractListModel(*(new QQuickCalendarModelPrivate), parent) +{ +} + +/*! + \qmlproperty date QtQuick.Controls::CalendarModel::from + + This property holds the start date. +*/ +QDate QQuickCalendarModel::from() const +{ + Q_D(const QQuickCalendarModel); + return d->from; +} + +void QQuickCalendarModel::setFrom(QDate from) +{ + Q_D(QQuickCalendarModel); + if (d->from != from) { + if (d->complete) + d->populate(from, d->to); + d->from = from; + emit fromChanged(); + } +} + +/*! + \qmlproperty date QtQuick.Controls::CalendarModel::to + + This property holds the end date. +*/ +QDate QQuickCalendarModel::to() const +{ + Q_D(const QQuickCalendarModel); + return d->to; +} + +void QQuickCalendarModel::setTo(QDate to) +{ + Q_D(QQuickCalendarModel); + if (d->to != to) { + if (d->complete) + d->populate(d->from, to); + d->to = to; + emit toChanged(); + } +} + +/*! + \qmlmethod int QtQuick.Controls::CalendarModel::monthAt(int index) + + Returns the month number at the specified model \a index. +*/ +int QQuickCalendarModel::monthAt(int index) const +{ + Q_D(const QQuickCalendarModel); + return d->from.addMonths(index).month() - 1; +} + +/*! + \qmlmethod int QtQuick.Controls::CalendarModel::yearAt(int index) + + Returns the year number at the specified model \a index. +*/ +int QQuickCalendarModel::yearAt(int index) const +{ + Q_D(const QQuickCalendarModel); + return d->from.addMonths(index).year(); +} + +/*! + \qmlmethod int QtQuick.Controls::CalendarModel::indexOf(Date date) + + Returns the model index of the specified \a date. +*/ +int QQuickCalendarModel::indexOf(QDate date) const +{ + Q_D(const QQuickCalendarModel); + return d->getCount(d->from, date) - 1; +} + +/*! + \qmlmethod int QtQuick.Controls::CalendarModel::indexOf(int year, int month) + + Returns the model index of the specified \a year and \a month. +*/ +int QQuickCalendarModel::indexOf(int year, int month) const +{ + return indexOf(QDate(year, month + 1, 1)); +} + +QVariant QQuickCalendarModel::data(const QModelIndex &index, int role) const +{ + Q_D(const QQuickCalendarModel); + if (index.isValid() && index.row() < d->count) { + switch (role) { + case MonthRole: + return monthAt(index.row()); + case YearRole: + return yearAt(index.row()); + default: + break; + } + } + return QVariant(); +} + +int QQuickCalendarModel::rowCount(const QModelIndex &parent) const +{ + Q_D(const QQuickCalendarModel); + if (!parent.isValid()) + return d->count; + return 0; +} + +QHash<int, QByteArray> QQuickCalendarModel::roleNames() const +{ + QHash<int, QByteArray> roles; + roles[MonthRole] = QByteArrayLiteral("month"); + roles[YearRole] = QByteArrayLiteral("year"); + return roles; +} + +void QQuickCalendarModel::classBegin() +{ +} + +void QQuickCalendarModel::componentComplete() +{ + Q_D(QQuickCalendarModel); + d->complete = true; + d->populate(d->from, d->to, true); +} + +QT_END_NAMESPACE + +#include "moc_qquickcalendarmodel_p.cpp" |