Differential D12089 Diff 32379 framework/src/domain/perioddayeventmodel.h

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framework/src/domain/perioddayeventmodel.h

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1​/*
2​ Copyright (c) 2018 Michael Bohlender <michael.bohlender@kdemail.net>
3​ Copyright (c) 2018 Christian Mollekopf <mollekopf@kolabsys.com>
4​ Copyright (c) 2018 Rémi Nicole <minijackson@riseup.net>
5​
6​ This library is free software; you can redistribute it and/or modify it
7​ under the terms of the GNU Library General Public License as published by
8​ the Free Software Foundation; either version 2 of the License, or (at your
9​ option) any later version.
10​
11​ This library is distributed in the hope that it will be useful, but WITHOUT
12​ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13​ FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
14​ License for more details.
15​
16​ You should have received a copy of the GNU Library General Public License
17​ along with this library; see the file COPYING.LIB. If not, write to the
18​ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19​ 02110-1301, USA.
20​*/
21​
22​#pragma once
23​
24​#include <sink/applicationdomaintype.h>
25​
26​#include <QAbstractItemModel>
27​#include <QList>
28​#include <QSharedPointer>
29​#include <QVector>
30​
31​#include <limits>
32​
33​// Facility used to get a restricted period into a Sink model comprised of
34​// events, partitioned according to the day the events take place.
35​//
36​// Model Format
37​// ============
38​//
39​// Day 0
40​// |--- Event 0 starting at `periodStart + 0d`
41​// |--- Event 1 starting at `periodStart + 0d`
42​// '--- Event 2 starting at `periodStart + 0d`
43​// Day 1
44​// '--- Event 0 starting at `periodStart + 1d`
45​// Day 2
46​// Day 3
47​// |--- Event 0 starting at `periodStart + 3d`
48​// '--- Event 1 starting at `periodStart + 3d`
49​// Day 4
50​// ⋮
51​//
52​// Implementation notes
53​// ====================
54​//
55​// On the model side
56​// -----------------
57​//
58​// Columns are never used.
59​//
60​// Top-level items just contains the ".events" attribute, and their rows
61​// correspond to their offset compared to the start of the period (in number of
62​// days). In that case the internalId contains DAY_ID.
63​//
64​// Direct children are events, and their rows corresponds to their index in
65​// their partition. In that case no internalId / internalPointer is used.
66​//
67​// Internally:
68​// -----------
69​//
70​// On construction and on dataChanged, all events are processed and partitioned
71​// in partitionedEvents:
72​//
73​// QVector< QList<QSharedPointer<Event> >
74​// ~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
75​// | |
76​// | '--- List of event pointers for that day
77​// '--- Partition / day
78​//
79​class PeriodDayEventModel : public QAbstractItemModel
80​{
81​ Q_OBJECT
82​
83​ Q_PROPERTY(QVariant start READ periodStart WRITE setPeriodStart)
84​ Q_PROPERTY(int length READ periodLength WRITE setPeriodLength)
85​
86​public:
87​ using Event = Sink::ApplicationDomain::Event;
88​
89​ enum Roles
90​ {
91​ Events = Qt::UserRole + 1,
92​ Summary,
93​ Description,
94​ StartTime,
95​ Duration,
96​ };
97​ Q_ENUM(Roles);
98​ PeriodDayEventModel(QObject *parent = nullptr);
99​ ~PeriodDayEventModel() = default;
100​
101​ QModelIndex index(int row, int column, const QModelIndex &parent = {}) const override;
102​ QModelIndex parent(const QModelIndex &index) const override;
103​
104​ int rowCount(const QModelIndex &parent) const override;
105​ int columnCount(const QModelIndex &parent) const override;
106​
107​ QVariant data(const QModelIndex &index, int role) const override;
108​
109​ QHash<int, QByteArray> roleNames() const override;
110​
111​ QDate periodStart() const;
112​ void setPeriodStart(const QDate &);
113​ void setPeriodStart(const QVariant &);
114​ int periodLength() const;
cmollekopfUnsubmitted
Done

pass by const ref

cmollekopf: pass by const ref
115​ void setPeriodLength(int);
116​
117​private:
118​ void partitionData();
119​
120​ int bucketOf(const QDate &candidate) const;
121​
cmollekopfUnsubmitted
Done

We use "const QDate &candidate" everywhere else, so let's stick to that.

cmollekopf: We use "const QDate &candidate" everywhere else, so let's stick to that.
122​ QDate mPeriodStart;
123​ int mPeriodLength = 7;
124​
125​ QSharedPointer<QAbstractItemModel> eventModel;
126​ QVector<QList<QSharedPointer<Event>>> partitionedEvents;
127​
128​ static const constexpr quintptr DAY_ID = std::numeric_limits<quintptr>::max();
129​};