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history.h
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history.h
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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef HISTORY_H
#define HISTORY_H
#include "modelmenu.h"
#include <QtCore/QDateTime>
#include <QtCore/QHash>
#include <QtCore/QObject>
#include <QtCore/QTimer>
#include <QtCore/QUrl>
#include <QtCore/QSortFilterProxyModel>
class HistoryItem
{
public:
HistoryItem() {}
HistoryItem(const QString &u,
const QDateTime &d = QDateTime(), const QString &t = QString())
: title(t), url(u), dateTime(d) {}
inline bool operator==(const HistoryItem &other) const
{ return other.title == title
&& other.url == url && other.dateTime == dateTime; }
// history is sorted in reverse
inline bool operator <(const HistoryItem &other) const
{ return dateTime > other.dateTime; }
QString title;
QString url;
QDateTime dateTime;
};
class AutoSaver;
class HistoryModel;
class HistoryFilterModel;
class HistoryTreeModel;
class HistoryManager : public QObject
{
Q_OBJECT
Q_PROPERTY(int historyLimit READ historyLimit WRITE setHistoryLimit)
signals:
void historyReset();
void entryAdded(const HistoryItem &item);
void entryRemoved(const HistoryItem &item);
void entryUpdated(int offset);
public:
HistoryManager(QObject *parent = 0);
~HistoryManager();
bool historyContains(const QString &url) const;
void addHistoryEntry(const QString &url);
void updateHistoryItem(const QUrl &url, const QString &title);
int historyLimit() const;
void setHistoryLimit(int limit);
QList<HistoryItem> history() const;
void setHistory(const QList<HistoryItem> &history, bool loadedAndSorted = false);
// History manager keeps around these models for use by the completer and other classes
HistoryModel *historyModel() const;
HistoryFilterModel *historyFilterModel() const;
HistoryTreeModel *historyTreeModel() const;
public slots:
void clear();
void loadSettings();
private slots:
void save();
void checkForExpired();
protected:
void addHistoryItem(const HistoryItem &item);
private:
void load();
AutoSaver *m_saveTimer;
int m_historyLimit;
QTimer m_expiredTimer;
QList<HistoryItem> m_history;
QString m_lastSavedUrl;
HistoryModel *m_historyModel;
HistoryFilterModel *m_historyFilterModel;
HistoryTreeModel *m_historyTreeModel;
};
class HistoryModel : public QAbstractTableModel
{
Q_OBJECT
public slots:
void historyReset();
void entryAdded();
void entryUpdated(int offset);
public:
enum Roles {
DateRole = Qt::UserRole + 1,
DateTimeRole = Qt::UserRole + 2,
UrlRole = Qt::UserRole + 3,
UrlStringRole = Qt::UserRole + 4
};
HistoryModel(HistoryManager *history, QObject *parent = 0);
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
private:
HistoryManager *m_history;
};
/*!
Proxy model that will remove any duplicate entries.
Both m_sourceRow and m_historyHash store their offsets not from
the front of the list, but as offsets from the back.
*/
class HistoryFilterModel : public QAbstractProxyModel
{
Q_OBJECT
public:
HistoryFilterModel(QAbstractItemModel *sourceModel, QObject *parent = 0);
inline bool historyContains(const QString &url) const
{ load(); return m_historyHash.contains(url); }
int historyLocation(const QString &url) const;
QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
void setSourceModel(QAbstractItemModel *sourceModel);
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
QModelIndex index(int, int, const QModelIndex& = QModelIndex()) const;
QModelIndex parent(const QModelIndex& index= QModelIndex()) const;
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
private slots:
void sourceReset();
void sourceDataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
void sourceRowsInserted(const QModelIndex &parent, int start, int end);
void sourceRowsRemoved(const QModelIndex &, int, int);
private:
void load() const;
mutable QList<int> m_sourceRow;
mutable QHash<QString, int> m_historyHash;
mutable bool m_loaded;
};
/*
The history menu
- Removes the first twenty entries and puts them as children of the top level.
- If there are less then twenty entries then the first folder is also removed.
The mapping is done by knowing that HistoryTreeModel is over a table
We store that row offset in our index's private data.
*/
class HistoryMenuModel : public QAbstractProxyModel
{
Q_OBJECT
public:
HistoryMenuModel(HistoryTreeModel *sourceModel, QObject *parent = 0);
int columnCount(const QModelIndex &parent) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
QModelIndex mapFromSource(const QModelIndex & sourceIndex) const;
QModelIndex mapToSource(const QModelIndex & proxyIndex) const;
QModelIndex index(int, int, const QModelIndex &parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex &index = QModelIndex()) const;
int bumpedRows() const;
private:
HistoryTreeModel *m_treeModel;
};
// Menu that is dynamically populated from the history
class HistoryMenu : public ModelMenu
{
Q_OBJECT
signals:
void openUrl(const QUrl &url);
public:
HistoryMenu(QWidget *parent = 0);
void setInitialActions(QList<QAction*> actions);
protected:
bool prePopulated();
void postPopulated();
private slots:
void activated(const QModelIndex &index);
void showHistoryDialog();
private:
HistoryManager *m_history;
HistoryMenuModel *m_historyMenuModel;
QList<QAction*> m_initialActions;
};
// proxy model for the history model that
// exposes each url http://www.foo.com and it url starting at the host www.foo.com
class HistoryCompletionModel : public QAbstractProxyModel
{
Q_OBJECT
public:
HistoryCompletionModel(QObject *parent = 0);
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
int columnCount(const QModelIndex &parent = QModelIndex()) const;
QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
QModelIndex index(int, int, const QModelIndex& = QModelIndex()) const;
QModelIndex parent(const QModelIndex& index= QModelIndex()) const;
void setSourceModel(QAbstractItemModel *sourceModel);
private slots:
void sourceReset();
};
// proxy model for the history model that converts the list
// into a tree, one top level node per day.
// Used in the HistoryDialog.
class HistoryTreeModel : public QAbstractProxyModel
{
Q_OBJECT
public:
HistoryTreeModel(QAbstractItemModel *sourceModel, QObject *parent = 0);
QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
int columnCount(const QModelIndex &parent) const;
int rowCount(const QModelIndex &parent = QModelIndex()) const;
QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
QModelIndex parent(const QModelIndex &index= QModelIndex()) const;
bool hasChildren(const QModelIndex &parent = QModelIndex()) const;
Qt::ItemFlags flags(const QModelIndex &index) const;
bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
void setSourceModel(QAbstractItemModel *sourceModel);
private slots:
void sourceReset();
void sourceRowsInserted(const QModelIndex &parent, int start, int end);
void sourceRowsRemoved(const QModelIndex &parent, int start, int end);
private:
int sourceDateRow(int row) const;
mutable QList<int> m_sourceRowCache;
};
// A modified QSortFilterProxyModel that always accepts the root nodes in the tree
// so filtering is only done on the children.
// Used in the HistoryDialog
class TreeProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
public:
TreeProxyModel(QObject *parent = 0);
protected:
bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const;
};
#include "ui_history.h"
class HistoryDialog : public QDialog, public Ui_HistoryDialog
{
Q_OBJECT
signals:
void openUrl(const QUrl &url);
public:
HistoryDialog(QWidget *parent = 0, HistoryManager *history = 0);
private slots:
void customContextMenuRequested(const QPoint &pos);
void open();
void copy();
};
#endif // HISTORY_H