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| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
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| ** |
| ** This file is part of the Qt Labs Calendar module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #include "qquickcalendarmodel_p.h" |
| |
| #include <QtCore/private/qabstractitemmodel_p.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \qmltype CalendarModel |
| \inherits QAbstractListModel |
| //! \instantiates QQuickCalendarModel |
| \inqmlmodule Qt.labs.calendar |
| \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 qtlabscalendar-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 |
| |
| The Qt Labs Calendar module uses 0-based month numbers to be consistent |
| with the JavaScript Date type, that is used by the QML language. This |
| means that \c Date::getMonth() can be passed to the methods as is. When |
| dealing with month numbers directly, it is highly recommended to use the |
| following enumeration values to avoid confusion. |
| |
| \value Calendar.January January (0) |
| \value Calendar.February February (1) |
| \value Calendar.March March (2) |
| \value Calendar.April April (3) |
| \value Calendar.May May (4) |
| \value Calendar.June June (5) |
| \value Calendar.July July (6) |
| \value Calendar.August August (7) |
| \value Calendar.September September (8) |
| \value Calendar.October October (9) |
| \value Calendar.November November (10) |
| \value Calendar.December December (11) |
| |
| \labs |
| |
| \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(const QDate& from, const QDate &to); |
| |
| void populate(const QDate &from, const QDate &to, bool force = false); |
| |
| bool complete; |
| QDate from; |
| QDate to; |
| int count; |
| }; |
| |
| int QQuickCalendarModelPrivate::getCount(const QDate& from, const QDate &to) |
| { |
| if (!from.isValid() || !to.isValid()) |
| return 0; |
| |
| QDate f(from.year(), from.month(), 1); |
| QDate t(to.year(), to.month(), to.daysInMonth()); |
| int days = f.daysTo(t); |
| if (days < 0) |
| return 0; |
| |
| QDate r = QDate(1, 1, 1).addDays(days); |
| int years = r.year() - 1; |
| int months = r.month() - 1; |
| return 12 * years + months + (r.day() / t.day()); |
| } |
| |
| void QQuickCalendarModelPrivate::populate(const QDate &f, const 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 Qt.labs.calendar::CalendarModel::from |
| |
| This property holds the start date. |
| */ |
| QDate QQuickCalendarModel::from() const |
| { |
| Q_D(const QQuickCalendarModel); |
| return d->from; |
| } |
| |
| void QQuickCalendarModel::setFrom(const QDate &from) |
| { |
| Q_D(QQuickCalendarModel); |
| if (d->from != from) { |
| if (d->complete) |
| d->populate(from, d->to); |
| d->from = from; |
| emit fromChanged(); |
| } |
| } |
| |
| /*! |
| \qmlproperty date Qt.labs.calendar::CalendarModel::to |
| |
| This property holds the end date. |
| */ |
| QDate QQuickCalendarModel::to() const |
| { |
| Q_D(const QQuickCalendarModel); |
| return d->to; |
| } |
| |
| void QQuickCalendarModel::setTo(const QDate &to) |
| { |
| Q_D(QQuickCalendarModel); |
| if (d->to != to) { |
| if (d->complete) |
| d->populate(d->from, to); |
| d->to = to; |
| emit toChanged(); |
| } |
| } |
| |
| /*! |
| \qmlmethod int Qt.labs.calendar::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 Qt.labs.calendar::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 Qt.labs.calendar::CalendarModel::indexOf(Date date) |
| |
| Returns the model index of the specified \a date. |
| */ |
| int QQuickCalendarModel::indexOf(const QDate &date) const |
| { |
| Q_D(const QQuickCalendarModel); |
| return d->getCount(d->from, date) - 1; |
| } |
| |
| /*! |
| \qmlmethod int Qt.labs.calendar::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 |