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336 lines
12 KiB
336 lines
12 KiB
/* This file is part of the KDE project
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Copyright (C) 2003 Lucijan Busch <lucijan@kde.org>
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Copyright (C) 2003-2006 Jaroslaw Staniek <js@iidea.pl>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef KEXIPROJECT_H
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#define KEXIPROJECT_H
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#include <tqobject.h>
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#include <tqintdict.h>
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#include <tqptrdict.h>
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#include <tqguardedptr.h>
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#include <kexiutils/tristate.h>
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#include <kexidb/object.h>
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#include "kexiprojectdata.h"
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#include "kexipartitem.h"
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#include "kexi.h"
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/*! KexiProject implementation version.
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It is altered after every change:
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- major number is increased after KexiProject storage format change,
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- minor is increased after adding binary-incompatible change.
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Use KexiProject::versionMajor() and KexiProject::versionMinor() to get real project's version.
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*/
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#define KEXIPROJECT_VERSION_MAJOR 1
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#define KEXIPROJECT_VERSION_MINOR 0
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namespace KexiDB
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{
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class DriverManager;
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class Driver;
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class Connection;
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class Parser;
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}
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namespace KexiPart
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{
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class Part;
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class Info;
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}
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class KexiMainWindow;
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class KexiDialogBase;
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/**
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* @short A project's main controller.
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* It also contains connection data,
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* current file state, etc.
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*/
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class KEXICORE_EXPORT KexiProject : public TQObject, public KexiDB::Object
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{
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Q_OBJECT
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TQ_OBJECT
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public:
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/*! Constructor 1. Creates a new object using \a pdata.
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\a pdata which will be then owned by KexiProject object.
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\a handler can be provided to receive error messages during
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entire KexiProject object's lifetime. */
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KexiProject(KexiProjectData* pdata, KexiDB::MessageHandler* handler = 0);
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/*! Constructor 2. Like above but sets predefined connections \a conn.
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The connection should be created using the same connection data
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as pdata->connectionData(). The connection will become owned by created KexiProject
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object, so do not destroy it. */
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KexiProject(KexiProjectData *pdata, KexiDB::MessageHandler* handler,
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KexiDB::Connection* conn);
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// KexiProject(KexiDB::ConnectionData *cdata);
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~KexiProject();
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/*! \return major version of KexiProject object.
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This information is retrieved from database when existing project is opened. */
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int versionMajor() const;
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/*! \return minor version of KexiProject object.
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@see versionMajor() */
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int versionMinor() const;
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/*! Opens existing project using project data.
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\return true on success */
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tristate open();
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/*! Like open().
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\return true on success.
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Additional \a incompatibleWithKexi, is set to false on failure when
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connection for the project was successfully started bu the project
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is probably not compatible with Kexi - no valid "kexidb_major_ver"
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value in "kexi__db" table.
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This is often the case for native server-based databases.
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If so, Kexi application can propose importing the database
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or linking it to parent project (the latter isn't yet implemented).
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For other types of errors the variable is set to true. */
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tristate open(bool &incompatibleWithKexi);
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/*! Creates new, empty project using project data.
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If \a forceOverwrite is true, existing database project is silently overwritten.
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Connection is created (accessible then with KexiProject::dbConnection()).
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Since KexiProject inherits KexiDB::Object, it is possible to get error message
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and other information on error.
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\return true on success, false on failure, and cancelled when database exists
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but \a forceOverwrite is false. */
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tristate create(bool forceOverwrite = false);
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/*! \return true if there was error during last operation on the object. */
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bool error() const { return KexiDB::Object::error(); }
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/**
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* @return true if a we are connected to a database
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*/
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bool isConnected();
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/**
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* @return all items of a type \a i in this project
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*/
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KexiPart::ItemDict* items(KexiPart::Info *i);
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/**
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* @return all items of a type \a mime in this project
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* It is a convenience function.
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*/
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KexiPart::ItemDict* itemsForMimeType(const TQCString &mimeType);
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/**
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* Puts a list of items of a type \a i in this project into \a list.
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* You can then sort this list using ItemList::sort().
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*/
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void getSortedItems(KexiPart::ItemList& list, KexiPart::Info *i);
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/**
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* Puts a sorted list of items of a type \a mimeType in this project into \a list.
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* You can then sort this list using ItemList::sort().
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*/
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void getSortedItemsForMimeType(KexiPart::ItemList& list, const TQCString &mimeType);
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/**
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* @return item of type \a mime and name \a name
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*/
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KexiPart::Item* itemForMimeType(const TQCString &mimeType, const TQString &name);
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/**
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* @return item of type \a i and name \a name
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*/
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KexiPart::Item* item(KexiPart::Info *i, const TQString &name);
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/**
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* @return item for \a identifier
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*/
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KexiPart::Item* item(int identifier);
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/**
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* @return the database connection associated with this project
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*/
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KexiDB::Connection *dbConnection() const;
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/**
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* @return the project's data
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*/
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KexiProjectData *data() const;
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/*! Opens object pointed by \a item in a view \a viewMode.
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\a staticObjectArgs can be passed for static object
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(only works when part for this item is of type KexiPart::StaticPart) */
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KexiDialogBase* openObject(KexiMainWindow *wnd, KexiPart::Item& item,
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int viewMode = Kexi::DataViewMode, TQMap<TQString,TQString>* staticObjectArgs = 0);
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//! For convenience
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KexiDialogBase* openObject(KexiMainWindow *wnd, const TQCString &mimeType,
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const TQString& name, int viewMode = Kexi::DataViewMode);
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/*! Remove a part instance pointed by \a item.
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\return true on success. */
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bool removeObject(KexiMainWindow *wnd, KexiPart::Item& item);
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/*! Renames a part instance pointed by \a item to a new name \a newName.
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\return true on success. */
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bool renameObject(KexiMainWindow *wnd, KexiPart::Item& item, const TQString& newName);
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/*! Creates part item for given part \a info.
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Newly item will not be saved to the backend but stored in memory only
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(owned by project), and marked as "neverSaved" (see KexiPart::Item::neverSaved()).
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The item will have assigned a new unique caption like e.g. "Table15",
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and unique name like "table15", but no specific identifier
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(because id will be assigned on creation at the backend side).
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If \a suggestedCaption is not empty, it will be set as a caption
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(with number suffix, to avoid duplicated, e.g. "employees7"
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for "employees" sugested name). Name will be then built based
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on this caption using KexiUtils::string2Identifier().
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This method is used before creating new object.
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\return newly created part item or NULL on any error. */
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KexiPart::Item* createPartItem(KexiPart::Info *info,
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const TQString& suggestedCaption = TQString() );
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//! Added for convenience.
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KexiPart::Item* createPartItem(KexiPart::Part *part,
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const TQString& suggestedCaption = TQString());
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/*! Adds item \a item after it is succesfully stored as an instance of part
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pointed by \a info. Also clears 'neverSaved' flag if \a item.
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Used by KexiDialogBase::storeNewData().
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@internal */
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void addStoredItem(KexiPart::Info *info, KexiPart::Item *item);
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/*! removes \a item from internal dictionaries. The item is destroyed
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after successful removal.
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Used to delete an unstored part item previusly created with createPartItem(). */
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void deleteUnstoredItem(KexiPart::Item *item);
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#if 0 //remove?
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/*! Creates object using data provided by \a dlg dialog.
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Dialog's \a item (KexiDialog::partItem()) must not be stored
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(KexiPart::Item::neverStored()==false) and created
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by KexiProject::createPartItem().
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Identifier of the item will be updated to a final value
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(stored in the backend), because previously there was temporary one set.
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\return true for successfully created object or false on any error. */
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bool createObject(KexiDialogBase *dlg);
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#endif
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KexiDB::Parser* sqlParser();
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/*! Shows dialog for creating new blank project,
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ans creates one. Dialog is not shown if option for automatic creation
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is checked or Kexi::startupHandler().projectData() was provided from command line.
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\a cancelled is set to true if creation has been cancelled (e.g. user answered
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no when asked for database overwriting, etc.
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\return true if database was created, false on error or when cancel was pressed */
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static KexiProject* createBlankProject(bool &cancelled, KexiProjectData* data,
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KexiDB::MessageHandler* handler = 0);
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/*! Drops project described by \a data. \return true on success.
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Use with care: Any KexiProject objects allocated for this project will become invalid! */
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static tristate dropProject(KexiProjectData* data,
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KexiDB::MessageHandler* handler, bool dontAsk = false);
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/*! @see KexiDB::Connection::setQuerySchemaObsolete( const TQString& queryName ) */
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// void setQuerySchemaObsolete( const TQString& queryName );
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// /** used to emit objectCreated() signal */
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// void emitObjectCreated(const TQCString &mime, const TQCString& name) { emit objectCreated(mime, name); }
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// void emitTableCreated(KexiDB::TableSchema& schema) { emit tableCreated(schema); }
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protected:
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/*! Creates connection using project data.
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The connection will be readonly if data()->isReadOnly().
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\return true on success, otherwise false and appropriate error is set. */
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bool createConnection();
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bool closeConnection();
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bool initProject();
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//! Used in open() and open(bool&).
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tristate openInternal(bool *incompatibleWithKexi);
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/*! Kexi itself can define a number of internal database objects (mostly data structures),
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usually tables for it's own purposes.
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Even while at KexiDB library level, such "system" tables, like "kexi__objects", "kexi__objectdata"
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are created automatically on database project creation, this is not enough: there are objects
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needed specifically for Kexi but not for other applications utilizing KexiDB library.
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Example table created here for now is "kexi__blobs".
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This method is called on create() and open(): creates necessary objects
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if they are not yet existing. This especially allows to create to create these objects
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(on open) within a project made with previous Kexi version not supporting
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all currently defined structurtes. We're trying to be here as much backward compatible as possible.
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For this purpose, here's the complete list of currently created objects:
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- "kexi__blobs" - a table containing BLOBs data that can be accessed globally at Kexi projects
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from within any database-aware view (table views, forms, reports, etc.)
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@param insideTransaction Embed entire creation process inside a transaction
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\return true on successful object's creation. Objects are created only once, they are not overwritten.
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*/
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bool createInternalStructures(bool insideTransaction);
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/*! \return Kexi part for \a item. */
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KexiPart::Part *findPartFor(KexiPart::Item& item);
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signals:
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/** signal emitted on error */
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void error(const TQString &title, KexiDB::Object *obj);
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/** signal emitted on error (not KexiDB-related) */
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void error(const TQString &msg, const TQString &desc);
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/** New \a item has been stored. */
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void newItemStored(KexiPart::Item& item);
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/** instance pointed by \a item is removed */
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void itemRemoved(const KexiPart::Item &item);
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/** instance pointed by \a item is renamed */
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void itemRenamed(const KexiPart::Item &item, const TQCString& oldName);
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// /** new table \a schema created */
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// void tableCreated(KexiDB::TableSchema& schema);
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// /** New object of mimetype \a mime and \a name has been created. */
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// void objectCreated(const TQCString &mime, const TQCString& name);
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protected:
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/*! Checks whether the project's connection is read-only.
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If so, error message is set and false is returned. */
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bool checkWritable();
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class Private;
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Private *d;
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friend class KexiMainWindowImpl;
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};
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#endif
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