history.h Example File
demos/browser/history.h
#ifndef HISTORY_H
#define HISTORY_H
#include "modelmenu.h"
#include <QtCore/QObject>
#include <QtCore/QUrl>
#include <QtCore/QDateTime>
#include <QtCore/QTimer>
#include <QtCore/QHash>
#include <QtGui/QMenu>
#include <QtGui/QAbstractProxyModel>
#include <QtGui/QSortFilterProxyModel>
#include <QWebHistoryInterface>
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; }
inline bool operator <(const HistoryItem &other) const
{ return dateTime > other.dateTime; }
QString title;
QString url;
QDateTime dateTime;
};
class AutoSave;
class HistoryModel;
class HistoryFilterModel;
class HistoryTreeModel;
class History : public QWebHistoryInterface
{
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:
History(QObject *parent = 0);
~History();
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 loaded = false);
History manager keeps around these models for use by the completer and other classes
QAbstractItemModel *historyModel() const;
QAbstractItemModel *historyFilterModel() const;
QAbstractItemModel *historyTreeModel() const;
public slots:
void clear();
private slots:
void save();
void checkForExpired();
protected:
void addHistoryItem(const HistoryItem &item);
private:
void load();
AutoSave *m_saveTimer;
int m_historyLimit;
QTimer m_expiredTimer;
QList<HistoryItem> m_history;
QString m_lastSavedUrl;
HistoryModel *m_historyModel;
HistoryFilterModel *m_historyFilterModel;
HistoryTreeModel *m_historyTreeModel;
};
Menu that is dynamically populated from the history
class HistoryMenu : public ModelMenu
{
Q_OBJECT
signals:
void openUrl(const QUrl &url);
public:
HistoryMenu(History *history, QWidget * parent = 0);
void setInitialActions(QList<QAction*> actions);
protected:
bool prePopulated();
void postPopulated();
private slots:
void activated(const QModelIndex &index);
void showHistoryDialog();
private:
History *m_history;
QList<QAction*> initialActions;
};
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(History *h, 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:
History *history;
mutable QIcon defaultIcon;
};
class HistoryFilterModel : public QAbstractProxyModel
{
Q_OBJECT
public:
HistoryFilterModel(QAbstractItemModel *sourceModel, QObject *parent = 0);
int historyLocation(const QString &url) const;
inline bool historyContains(const QString &url) const
{ load(); return m_historyHash.contains(url); }
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 loaded;
};
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, int, const QModelIndex& = 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> 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(History *history, QWidget *parent = 0);
private slots:
void customContextMenuRequested(const QPoint &pos);
void open();
};
#endif HISTORY_H