kotschak/qelectrotech-source-mirror
0
0
Fork 0
mirror of https://github.com/qelectrotech/qelectrotech-source-mirror.git synced 2025-12-24 03:10:52 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Implemented a SQLite-based cache to speed up the elements panel loading.

Browse Source 
git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/branches/0.3@1329 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
xavier
2011-09-13 21:46:10 +00:00
parent 9f9c67f4cf
commit 2a6ecee31b
15 changed files with 399 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
sources/elementscollectioncache.h Normal file
View File

@@ -0,0 +1,69 @@
/*
Copyright 2006-2011 Xavier Guerrin
This file is part of QElectroTech.
QElectroTech is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
QElectroTech is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef ELEMENTS_COLLECTION_CACHE_H
#define ELEMENTS_COLLECTION_CACHE_H
#include <QtCore>
#include <QtSql>
#include "elementslocation.h"
class ElementsCollection;
class ElementsCategory;
class ElementDefinition;
/**
This class implements a SQLite cache for data related to elements
collections, mainly names and pixmaps. This avoids the cost of parsing XML
definitions of elements and building full CustomElement objects when
(re)loading the elements panel.
*/
class ElementsCollectionCache : public QObject {
public:
// constructor, destructor
ElementsCollectionCache(const QString &database_path, QObject * = 0);
virtual ~ElementsCollectionCache();
// methods
public:
void setLocale(const QString &);
QString locale() const;
bool setPixmapStorageFormat(const QString &);
QString pixmapStorageFormat() const;
void beginCollection(ElementsCollection *);
void endCollection(ElementsCollection *);
bool fetchElement(ElementDefinition *);
QString name() const;
QPixmap pixmap() const;
private:
bool fetchData(const ElementsLocation &);
bool fetchNameFromCache(const QString &, const QDateTime &);
bool fetchPixmapFromCache(const QString &, const QDateTime &);
bool cacheName(const QString &);
bool cachePixmap(const QString &);
// attributes
private:
QSqlDatabase cache_db_; ///< Object providing access to the SQLite database this cache relies on
QSqlQuery *select_name_; ///< Prepared statement to fetch names from the cache
QSqlQuery *select_pixmap_; ///< Prepared statement to fetch pixmaps from the cache
QSqlQuery *insert_name_; ///< Prepared statement to insert names into the cache
QSqlQuery *insert_pixmap_; ///< Prepared statement to insert pixmaps into the cache
QString locale_; ///< Locale to be used when dealing with names
QString pixmap_storage_format_; ///< Storage format for cached pixmaps
QString current_name_; ///< Last name fetched
QPixmap current_pixmap_; ///< Last pixmap fetched
};
#endif