/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the Qt3Support module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** 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 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "q3datatable.h" #ifndef QT_NO_SQL_VIEW_WIDGETS #include "qevent.h" #include "qsqldriver.h" #include "q3sqleditorfactory.h" #include "q3sqlpropertymap.h" #include "qapplication.h" #include "qlayout.h" #include "qpainter.h" #include "q3popupmenu.h" #include "q3valuelist.h" #include "q3sqlmanager_p.h" #include "qsqlfield.h" #include "qdatetime.h" #include "qcursor.h" #include "qtimer.h" #include "qpointer.h" QT_BEGIN_NAMESPACE //#define QT_DEBUG_DATATABLE class Q3DataTablePrivate { public: Q3DataTablePrivate() : nullTxtChanged( false ), haveAllRows( false ), continuousEdit( false ), editorFactory( 0 ), propertyMap( 0 ), datefmt( Qt::TextDate ), editRow( -1 ), editCol( -1 ), insertRowLast( -1 ), insertPreRows( -1 ), editBuffer( 0 ), cancelMode( false ), cancelInsert( false ), cancelUpdate( false ), lastAt( -1 ) {} ~Q3DataTablePrivate() { if ( propertyMap ) delete propertyMap; } QString nullTxt; bool nullTxtChanged; typedef Q3ValueList< uint > ColIndex; ColIndex colIndex; bool haveAllRows; bool continuousEdit; Q3SqlEditorFactory* editorFactory; Q3SqlPropertyMap* propertyMap; QString trueTxt; Qt::DateFormat datefmt; QString falseTxt; int editRow; int editCol; int insertRowLast; QString insertHeaderLabelLast; int insertPreRows; QSqlRecord* editBuffer; bool cancelMode; bool cancelInsert; bool cancelUpdate; int lastAt; QString ftr; QStringList srt; QStringList fld; QStringList fldLabel; Q3ValueList<int> fldWidth; Q3ValueList<QIconSet> fldIcon; Q3ValueList<bool> fldHidden; Q3SqlCursorManager cur; Q3DataManager dat; }; #ifdef QT_DEBUG_DATATABLE void qt_debug_buffer( const QString& msg, QSqlRecord* cursor ) { qDebug("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++"); qDebug(msg); for ( uint j = 0; j < cursor->count(); ++j ) { qDebug(cursor->field(j)->name() + " type:" + QString(cursor->field(j)->value().typeName()) + " value:" + cursor->field(j)->value().toString() ); } } #endif /*! \enum Q3DataTable::Refresh This enum describes the refresh options. \value RefreshData refresh the data, i.e. read it from the database \value RefreshColumns refresh the list of fields, e.g. the column headings \value RefreshAll refresh both the data and the list of fields */ /*! \class Q3DataTable \brief The Q3DataTable class provides a flexible SQL table widget that supports browsing and editing. \compat Q3DataTable supports various functions for presenting and editing SQL data from a \l Q3SqlCursor in a table. If you want a to present your data in a form use QDataBrowser, or for read-only forms, use QDataView instead. When displaying data, Q3DataTable only retrieves data for visible rows. If the driver supports the 'query size' property the Q3DataTable will have the correct number of rows and the vertical scroll bar will accurately reflect the number of rows displayed in proportion to the number of rows in the dataset. If the driver does not support the 'query size' property, rows are dynamically fetched from the database on an as-needed basis with the scroll bar becoming more accurate as the user scrolls down through the records. This allows extremely large queries to be displayed as quickly as possible, with minimum memory usage. Q3DataTable inherits Q3Table's API and extends it with functions to sort and filter the data and sort columns. See setSqlCursor(), setFilter(), setSort(), setSorting(), sortColumn() and refresh(). When displaying editable cursors, cell editing will be enabled. (For more information on editable cursors, see \l Q3SqlCursor). Q3DataTable can be used to modify existing data and to add new records. When a user makes changes to a field in the table, the cursor's edit buffer is used. The table will not send changes in the edit buffer to the database until the user moves to a different record in the grid or presses Enter. Cell editing is initiated by pressing F2 (or right clicking and then clicking the appropriate popup menu item) and canceled by pressing Esc. If there is a problem updating or adding data, errors are handled automatically (see handleError() to change this behavior). Note that if autoEdit() is false navigating to another record will cancel the insert or update. The user can be asked to confirm all edits with setConfirmEdits(). For more precise control use setConfirmInsert(), setConfirmUpdate(), setConfirmDelete() and setConfirmCancels(). Use setAutoEdit() to control the behavior of the table when the user edits a record and then navigates. (Note that setAutoDelete() is unrelated; it is used to set whether the Q3SqlCursor is deleted when the table is deleted.) Since the data table can perform edits, it must be able to uniquely identify every record so that edits are correctly applied. Because of this the underlying cursor must have a valid primary index to ensure that a unique record is inserted, updated or deleted within the database otherwise the database may be changed to an inconsistent state. Q3DataTable creates editors using the default \l Q3SqlEditorFactory. Different editor factories can be used by calling installEditorFactory(). A property map is used to map between the cell's value and the editor. You can use your own property map with installPropertyMap(). The contents of a cell is available as a QString with text() or as a QVariant with value(). The current record is returned by currentRecord(). Use the find() function to search for a string in the table. Editing actions can be applied programmatically. For example, the insertCurrent() function reads the fields from the current record into the cursor and performs the insert. The updateCurrent() and deleteCurrent() functions perform similarly to update and delete the current record respectively. Columns in the table can be created automatically based on the cursor (see setSqlCursor()). Columns can be manipulated manually using addColumn(), removeColumn() and setColumn(). The table automatically copies many of the properties of the cursor to format the display of data within cells (alignment, visibility, etc.). The cursor can be changed with setSqlCursor(). The filter (see setFilter()) and sort defined within the table are used instead of the filter and sort set on the cursor. For sorting options see setSort(), sortColumn(), sortAscending() and sortDescending(). Note that sorting operations will not behave as expected if you are using a QSqlSelectCursor because it uses user-defined SQL queries to obtain data. The text used to represent NULL, true and false values can be changed with setNullText(), setTrueText() and setFalseText() respectively. You can change the appearance of cells by reimplementing paintField(). Whenever a new row is selected in the table the currentChanged() signal is emitted. The primeInsert() signal is emitted when an insert is initiated. The primeUpdate() and primeDelete() signals are emitted when update and deletion are initiated respectively. Just before the database is updated a signal is emitted; beforeInsert(), beforeUpdate() or beforeDelete() as appropriate. */ /*! Constructs a data table which is a child of \a parent, called name \a name. */ Q3DataTable::Q3DataTable ( QWidget * parent, const char * name ) : Q3Table( parent, name ) { init(); } /*! Constructs a data table which is a child of \a parent, called name \a name using the cursor \a cursor. If \a autoPopulate is true (the default is false), columns are automatically created based upon the fields in the \a cursor record. Note that \a autoPopulate only governs the creation of columns; to load the cursor's data into the table use refresh(). If the \a cursor is read-only, the table also becomes read-only. In addition, the table adopts the cursor's driver's definition for representing NULL values as strings. */ Q3DataTable::Q3DataTable ( Q3SqlCursor* cursor, bool autoPopulate, QWidget * parent, const char * name ) : Q3Table( parent, name ) { init(); setSqlCursor( cursor, autoPopulate ); } /*! \internal */ void Q3DataTable::init() { d = new Q3DataTablePrivate(); setAutoEdit( true ); setSelectionMode( SingleRow ); setFocusStyle( FollowStyle ); d->trueTxt = tr( "True" ); d->falseTxt = tr( "False" ); d->datefmt = Qt::LocalDate; reset(); connect( this, SIGNAL(selectionChanged()), SLOT(updateCurrentSelection())); } /*! Destroys the object and frees any allocated resources. */ Q3DataTable::~Q3DataTable() { delete d; } /*! Adds the next column to be displayed using the field \a fieldName, column label \a label, width \a width and iconset \a iconset. If \a label is specified, it is used as the column's header label, otherwise the field's display label is used when setSqlCursor() is called. The \a iconset is used to set the icon used by the column header; by default there is no icon. \sa setSqlCursor() refresh() */ void Q3DataTable::addColumn( const QString& fieldName, const QString& label, int width, const QIconSet& iconset ) { d->fld += fieldName; d->fldLabel += label; d->fldIcon += iconset; d->fldWidth += width; d->fldHidden += false; } /*! Sets the \a col column to display using the field \a fieldName, column label \a label, width \a width and iconset \a iconset. If \a label is specified, it is used as the column's header label, otherwise the field's display label is used when setSqlCursor() is called. The \a iconset is used to set the icon used by the column header; by default there is no icon. \sa setSqlCursor() refresh() */ void Q3DataTable::setColumn( uint col, const QString& fieldName, const QString& label, int width, const QIconSet& iconset ) { d->fld[col]= fieldName; d->fldLabel[col] = label; d->fldIcon[col] = iconset; d->fldWidth[col] = width; d->fldHidden[col] = false; } /*! Removes column \a col from the list of columns to be displayed. If \a col does not exist, nothing happens. \sa QSqlField */ void Q3DataTable::removeColumn( int col ) { if ( d->fld.begin() + col != d->fld.end() ) { d->fld.remove( d->fld.at( col ) ); d->fldLabel.remove( d->fldLabel.at( col ) ); d->fldIcon.remove( d->fldIcon.at( col ) ); d->fldWidth.remove( d->fldWidth.at( col ) ); d->fldHidden.remove( d->fldHidden.at( col ) ); } } /*! Sets the column \a col to the width \a w. Note that unlike Q3Table the Q3DataTable is not immediately redrawn, you must call refresh(Q3DataTable::RefreshColumns) yourself. \sa refresh() */ void Q3DataTable::setColumnWidth( int col, int w ) { if ( d->fldWidth.at( col ) != d->fldWidth.end() ) { d->fldWidth[col] = w; } } /*! Resizes column \a col so that the column width is wide enough to display the widest item the column contains (including the column label). If the table's Q3SqlCursor is not currently active, the cursor will be refreshed before the column width is calculated. Be aware that this function may be slow on tables that contain large result sets. */ void Q3DataTable::adjustColumn( int col ) { Q3SqlCursor * cur = sqlCursor(); if ( !cur || cur->count() <= col ) return; if ( !cur->isActive() ) { d->cur.refresh(); } int oldRow = currentRow(); int w = fontMetrics().width( horizontalHeader()->label( col ) + QLatin1Char('W') ); cur->seek( QSql::BeforeFirst ); while ( cur->next() ) { w = qMax( w, fontMetrics().width( fieldToString( cur->fieldPtr( indexOf( col ) ) ) ) + 10 ); } setColumnWidth( col, w ); cur->seek( oldRow ); refresh( RefreshColumns ); } /*! \reimp */ void Q3DataTable::setColumnStretchable( int col, bool s ) { if ( numCols() == 0 ) { refresh( RefreshColumns ); } if ( numCols() > col ) { Q3Table::setColumnStretchable( col, s ); } } QString Q3DataTable::filter() const { return d->cur.filter(); } /*! \property Q3DataTable::filter \brief the data filter for the data table The filter applies to the data shown in the table. To view data with a new filter, use refresh(). A filter string is an SQL WHERE clause without the WHERE keyword. There is no default filter. \sa sort() */ void Q3DataTable::setFilter( const QString& filter ) { d->cur.setFilter( filter ); } /*! \property Q3DataTable::sort \brief the data table's sort The table's sort affects the order in which data records are displayed in the table. To apply a sort, use refresh(). When examining the sort property, a string list is returned with each item having the form 'fieldname order' (e.g., 'id ASC', 'surname DESC'). There is no default sort. Note that if you want to iterate over the sort list, you should iterate over a copy, e.g. \snippet doc/src/snippets/code/src_qt3support_sql_q3datatable.cpp 0 \sa filter() refresh() */ void Q3DataTable::setSort( const QStringList& sort ) { d->cur.setSort( sort ); } /*! \overload Sets the sort to be applied to the displayed data to \a sort. If there is no current cursor, nothing happens. A QSqlIndex contains field names and their ordering (ASC or DESC); these are used to compose the ORDER BY clause. \sa sort() */ void Q3DataTable::setSort( const QSqlIndex& sort ) { d->cur.setSort( sort ); } QStringList Q3DataTable::sort() const { return d->cur.sort(); } /*! Returns the cursor used by the data table. */ Q3SqlCursor* Q3DataTable::sqlCursor() const { return d->cur.cursor(); } void Q3DataTable::setConfirmEdits( bool confirm ) { d->dat.setConfirmEdits( confirm ); } void Q3DataTable::setConfirmInsert( bool confirm ) { d->dat.setConfirmInsert( confirm ); } void Q3DataTable::setConfirmUpdate( bool confirm ) { d->dat.setConfirmUpdate( confirm ); } void Q3DataTable::setConfirmDelete( bool confirm ) { d->dat.setConfirmDelete( confirm ); } /*! \property Q3DataTable::confirmEdits \brief whether the data table confirms edit operations If the confirmEdits property is true, the data table confirms all edit operations (inserts, updates and deletes). Finer control of edit confirmation can be achieved using \l confirmCancels, \l confirmInsert, \l confirmUpdate and \l confirmDelete. \sa confirmCancels() confirmInsert() confirmUpdate() confirmDelete() */ bool Q3DataTable::confirmEdits() const { return ( d->dat.confirmEdits() ); } /*! \property Q3DataTable::confirmInsert \brief whether the data table confirms insert operations If the confirmInsert property is true, all insertions must be confirmed by the user through a message box (this behavior can be changed by overriding the confirmEdit() function), otherwise all insert operations occur immediately. \sa confirmCancels() confirmEdits() confirmUpdate() confirmDelete() */ bool Q3DataTable::confirmInsert() const { return ( d->dat.confirmInsert() ); } /*! \property Q3DataTable::confirmUpdate \brief whether the data table confirms update operations If the confirmUpdate property is true, all updates must be confirmed by the user through a message box (this behavior can be changed by overriding the confirmEdit() function), otherwise all update operations occur immediately. \sa confirmCancels() confirmEdits() confirmInsert() confirmDelete() */ bool Q3DataTable::confirmUpdate() const { return ( d->dat.confirmUpdate() ); } /*! \property Q3DataTable::confirmDelete \brief whether the data table confirms delete operations If the confirmDelete property is true, all deletions must be confirmed by the user through a message box (this behavior can be changed by overriding the confirmEdit() function), otherwise all delete operations occur immediately. \sa confirmCancels() confirmEdits() confirmUpdate() confirmInsert() */ bool Q3DataTable::confirmDelete() const { return ( d->dat.confirmDelete() ); } /*! \property Q3DataTable::confirmCancels \brief whether the data table confirms cancel operations If the confirmCancel property is true, all cancels must be confirmed by the user through a message box (this behavior can be changed by overriding the confirmCancel() function), otherwise all cancels occur immediately. The default is false. \sa confirmEdits() confirmCancel() */ void Q3DataTable::setConfirmCancels( bool confirm ) { d->dat.setConfirmCancels( confirm ); } bool Q3DataTable::confirmCancels() const { return d->dat.confirmCancels(); } /*! \reimp For an editable table, creates an editor suitable for the field in column \a col. The editor is created using the default editor factory, unless a different editor factory was installed with installEditorFactory(). The editor is primed with the value of the field in \a col using a property map. The property map used is the default property map, unless a new property map was installed with installPropertMap(). If \a initFromCell is true then the editor is primed with the value in the Q3DataTable cell. */ QWidget * Q3DataTable::createEditor( int , int col, bool initFromCell ) const { if ( d->dat.mode() == QSql::None ) return 0; Q3SqlEditorFactory * f = (d->editorFactory == 0) ? Q3SqlEditorFactory::defaultFactory() : d->editorFactory; Q3SqlPropertyMap * m = (d->propertyMap == 0) ? Q3SqlPropertyMap::defaultMap() : d->propertyMap; QWidget * w = 0; if( initFromCell && d->editBuffer ){ w = f->createEditor( viewport(), d->editBuffer->fieldPtr( indexOf( col ) ) ); if ( w ) m->setProperty( w, d->editBuffer->value( indexOf( col ) ) ); } return w; } /*! \reimp */ bool Q3DataTable::eventFilter( QObject *o, QEvent *e ) { if ( d->cancelMode ) return true; int r = currentRow(); int c = currentColumn(); if ( d->dat.mode() != QSql::None ) { r = d->editRow; c = d->editCol; } d->cancelInsert = false; d->cancelUpdate = false; switch ( e->type() ) { case QEvent::KeyPress: { int conf = QSql::Yes; QKeyEvent *ke = (QKeyEvent*)e; if ( ( ke->key() == Qt::Key_Tab || ke->key() == Qt::Key_BackTab ) && ke->state() & Qt::ControlButton ) return false; if ( ke->key() == Qt::Key_Escape && d->dat.mode() == QSql::Insert ){ if ( confirmCancels() && !d->cancelMode ) { d->cancelMode = true; conf = confirmCancel( QSql::Insert ); d->cancelMode = false; } if ( conf == QSql::Yes ) { d->cancelInsert = true; } else { QWidget *editorWidget = cellWidget( r, c ); if ( editorWidget ) { editorWidget->setActiveWindow(); editorWidget->setFocus(); } return true; } } if ( ke->key() == Qt::Key_Escape && d->dat.mode() == QSql::Update ) { if ( confirmCancels() && !d->cancelMode ) { d->cancelMode = true; conf = confirmCancel( QSql::Update ); d->cancelMode = false; } if ( conf == QSql::Yes ){ d->cancelUpdate = true; } else { QWidget *editorWidget = cellWidget( r, c ); if ( editorWidget ) { editorWidget->setActiveWindow(); editorWidget->setFocus(); } return true; } } if ( ke->key() == Qt::Key_Insert && d->dat.mode() == QSql::None ) { beginInsert(); return true; } if ( ke->key() == Qt::Key_Delete && d->dat.mode() == QSql::None ) { deleteCurrent(); return true; } if ( d->dat.mode() != QSql::None ) { if ( (ke->key() == Qt::Key_Tab) && (c < numCols() - 1) && (!isColumnReadOnly( c+1 ) || d->dat.mode() == QSql::Insert) ) d->continuousEdit = true; else if ( (ke->key() == Qt::Key_BackTab) && (c > 0) && (!isColumnReadOnly( c-1 ) || d->dat.mode() == QSql::Insert) ) d->continuousEdit = true; else d->continuousEdit = false; } Q3SqlCursor * sql = sqlCursor(); if ( sql && sql->driver() && !sql->driver()->hasFeature( QSqlDriver::QuerySize ) && ke->key() == Qt::Key_End && d->dat.mode() == QSql::None ) { #ifndef QT_NO_CURSOR QApplication::setOverrideCursor( Qt::WaitCursor ); #endif int i = sql->at(); if ( i < 0 ) { i = 0; sql->seek(0); } while ( sql->next() ) i++; setNumRows( i+1 ); setCurrentCell( i+1, currentColumn() ); #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif return true; } break; } case QEvent::FocusOut: { QWidget *editorWidget = cellWidget( r, c ); repaintCell( currentRow(), currentColumn() ); if ( !d->cancelMode && editorWidget && o == editorWidget && ( d->dat.mode() == QSql::Insert) && !d->continuousEdit) { setCurrentCell( r, c ); d->cancelInsert = true; } d->continuousEdit = false; break; } case QEvent::FocusIn: repaintCell( currentRow(), currentColumn() ); break; default: break; } return Q3Table::eventFilter( o, e ); } /*! \reimp */ void Q3DataTable::resizeEvent ( QResizeEvent * e ) { if ( sqlCursor() && sqlCursor()->driver() && !sqlCursor()->driver()->hasFeature( QSqlDriver::QuerySize ) ) loadNextPage(); Q3Table::resizeEvent( e ); } /*! \reimp */ void Q3DataTable::contentsContextMenuEvent( QContextMenuEvent* e ) { Q3Table::contentsContextMenuEvent( e ); if ( isEditing() && d->dat.mode() != QSql::None ) endEdit( d->editRow, d->editCol, autoEdit(), false ); if ( !sqlCursor() ) return; if ( d->dat.mode() == QSql::None ) { if ( isReadOnly() ) return; enum { IdInsert, IdUpdate, IdDelete }; QPointer<Q3PopupMenu> popup = new Q3PopupMenu( this, "qt_datatable_menu" ); int id[ 3 ]; id[ IdInsert ] = popup->insertItem( tr( "Insert" ) ); id[ IdUpdate ] = popup->insertItem( tr( "Update" ) ); id[ IdDelete ] = popup->insertItem( tr( "Delete" ) ); bool enableInsert = sqlCursor()->canInsert(); popup->setItemEnabled( id[ IdInsert ], enableInsert ); bool enableUpdate = currentRow() > -1 && sqlCursor()->canUpdate() && !isColumnReadOnly( currentColumn() ); popup->setItemEnabled( id[ IdUpdate ], enableUpdate ); bool enableDelete = currentRow() > -1 && sqlCursor()->canDelete(); popup->setItemEnabled( id[ IdDelete ], enableDelete ); int r = popup->exec( e->globalPos() ); delete (Q3PopupMenu*) popup; if ( r == id[ IdInsert ] ) beginInsert(); else if ( r == id[ IdUpdate ] ) { if ( beginEdit( currentRow(), currentColumn(), false ) ) setEditMode( Editing, currentRow(), currentColumn() ); else endUpdate(); } else if ( r == id[ IdDelete ] ) deleteCurrent(); e->accept(); } } /*! \reimp */ void Q3DataTable::contentsMousePressEvent( QMouseEvent* e ) { Q3Table::contentsMousePressEvent( e ); } /*! \reimp */ QWidget* Q3DataTable::beginEdit ( int row, int col, bool replace ) { d->editRow = -1; d->editCol = -1; if ( !sqlCursor() ) return 0; if ( d->dat.mode() == QSql::Insert && !sqlCursor()->canInsert() ) return 0; if ( d->dat.mode() == QSql::Update && !sqlCursor()->canUpdate() ) return 0; d->editRow = row; d->editCol = col; if ( d->continuousEdit ) { // see comment in beginInsert() bool fakeReadOnly = isColumnReadOnly( col ); setColumnReadOnly( col, false ); QWidget* w = Q3Table::beginEdit( row, col, replace ); setColumnReadOnly( col, fakeReadOnly ); return w; } if ( d->dat.mode() == QSql::None && sqlCursor()->canUpdate() && sqlCursor()->primaryIndex().count() > 0 ) return beginUpdate( row, col, replace ); return 0; } /*! \reimp */ void Q3DataTable::endEdit( int row, int col, bool, bool ) { bool accept = autoEdit() && !d->cancelInsert && !d->cancelUpdate; QWidget *editor = cellWidget( row, col ); if ( !editor ) return; if ( d->cancelMode ) return; if ( d->dat.mode() != QSql::None && d->editBuffer ) { Q3SqlPropertyMap * m = (d->propertyMap == 0) ? Q3SqlPropertyMap::defaultMap() : d->propertyMap; d->editBuffer->setValue( indexOf( col ), m->property( editor ) ); clearCellWidget( row, col ); if ( !d->continuousEdit ) { switch ( d->dat.mode() ) { case QSql::Insert: if ( accept ) QTimer::singleShot( 0, this, SLOT(doInsertCurrent()) ); else endInsert(); break; case QSql::Update: if ( accept ) QTimer::singleShot( 0, this, SLOT(doUpdateCurrent()) ); else endUpdate(); break; default: break; } } } else { setEditMode( NotEditing, -1, -1 ); } if ( d->dat.mode() == QSql::None ) viewport()->setFocus(); updateCell( row, col ); emit valueChanged( row, col ); } /*! \internal */ void Q3DataTable::doInsertCurrent() { insertCurrent(); } /*! \internal */ void Q3DataTable::doUpdateCurrent() { updateCurrent(); if ( d->dat.mode() == QSql::None ) { viewport()->setFocus(); } } /*! \reimp */ void Q3DataTable::activateNextCell() { // if ( d->dat.mode() == QSql::None ) // Q3Table::activateNextCell(); } /*! \internal */ void Q3DataTable::endInsert() { if ( d->dat.mode() != QSql::Insert ) return; d->dat.setMode( QSql::None ); d->editBuffer = 0; verticalHeader()->setLabel( d->editRow, QString::number( d->editRow +1 ) ); d->editRow = -1; d->editCol = -1; d->insertRowLast = -1; d->insertHeaderLabelLast.clear(); setEditMode( NotEditing, -1, -1 ); setNumRows( d->insertPreRows ); d->insertPreRows = -1; viewport()->setFocus(); } /*! \internal */ void Q3DataTable::endUpdate() { d->dat.setMode( QSql::None ); d->editBuffer = 0; updateRow( d->editRow ); d->editRow = -1; d->editCol = -1; setEditMode( NotEditing, -1, -1 ); } /*! Protected virtual function called when editing is about to begin on a new record. If the table is read-only, or if there's no cursor or the cursor does not allow inserts, nothing happens and false is returned. Otherwise returns true. Editing takes place using the cursor's edit buffer(see Q3SqlCursor::editBuffer()). When editing begins, a new row is created in the table marked with an asterisk '*' in the row's vertical header column, i.e. at the left of the row. */ bool Q3DataTable::beginInsert() { if ( !sqlCursor() || isReadOnly() || !numCols() ) return false; if ( !sqlCursor()->canInsert() ) return false; int i = 0; int row = currentRow(); d->insertPreRows = numRows(); if ( row < 0 || numRows() < 1 ) row = 0; setNumRows( d->insertPreRows + 1 ); setCurrentCell( row, 0 ); d->editBuffer = sqlCursor()->primeInsert(); emit primeInsert( d->editBuffer ); d->dat.setMode( QSql::Insert ); int lastRow = row; int lastY = contentsY() + visibleHeight(); for ( i = row; i < numRows() ; ++i ) { QRect cg = cellGeometry( i, 0 ); if ( (cg.y()+cg.height()) > lastY ) { lastRow = i; break; } } if ( lastRow == row && ( numRows()-1 > row ) ) lastRow = numRows() - 1; d->insertRowLast = lastRow; d->insertHeaderLabelLast = verticalHeader()->label( d->insertRowLast ); verticalHeader()->setLabel( row, QString(QLatin1Char('*')) ); d->editRow = row; // in the db world it's common to allow inserting new records // into a table that has read-only columns - temporarily // switch off read-only mode for such columns bool fakeReadOnly = isColumnReadOnly( 0 ); setColumnReadOnly( 0, false ); if ( Q3Table::beginEdit( row, 0, false ) ) setEditMode( Editing, row, 0 ); setColumnReadOnly( 0, fakeReadOnly ); return true; } /*! Protected virtual function called when editing is about to begin on an existing row. If the table is read-only, or if there's no cursor, nothing happens. Editing takes place using the cursor's edit buffer (see Q3SqlCursor::editBuffer()). \a row and \a col refer to the row and column in the Q3DataTable. (\a replace is provided for reimplementors and reflects the API of Q3Table::beginEdit().) */ QWidget* Q3DataTable::beginUpdate ( int row, int col, bool replace ) { if ( !sqlCursor() || isReadOnly() || isColumnReadOnly( col ) ) return 0; setCurrentCell( row, col ); d->dat.setMode( QSql::Update ); if ( sqlCursor()->seek( row ) ) { d->editBuffer = sqlCursor()->primeUpdate(); sqlCursor()->seek( currentRow() ); emit primeUpdate( d->editBuffer ); return Q3Table::beginEdit( row, col, replace ); } return 0; } /*! For an editable table, issues an insert on the current cursor using the values in the cursor's edit buffer. If there is no current cursor or there is no current "insert" row, nothing happens. If confirmEdits() or confirmInsert() is true, confirmEdit() is called to confirm the insert. Returns true if the insert succeeded; otherwise returns false. The underlying cursor must have a valid primary index to ensure that a unique record is inserted within the database otherwise the database may be changed to an inconsistent state. */ bool Q3DataTable::insertCurrent() { if ( d->dat.mode() != QSql::Insert || ! numCols() ) return false; if ( !sqlCursor()->canInsert() ) { #ifdef QT_CHECK_RANGE qWarning("Q3DataTable::insertCurrent: insert not allowed for %s", sqlCursor()->name().latin1() ); #endif endInsert(); return false; } int b = 0; int conf = QSql::Yes; if ( confirmEdits() || confirmInsert() ) conf = confirmEdit( QSql::Insert ); switch ( conf ) { case QSql::Yes: { #ifndef QT_NO_CURSOR QApplication::setOverrideCursor( Qt::waitCursor ); #endif emit beforeInsert( d->editBuffer ); b = sqlCursor()->insert(); #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif if ( ( !b && !sqlCursor()->isActive() ) || !sqlCursor()->isActive() ) { handleError( sqlCursor()->lastError() ); endInsert(); // cancel the insert if anything goes wrong refresh(); } else { endInsert(); refresh(); QSqlIndex idx = sqlCursor()->primaryIndex(); findBuffer( idx, d->lastAt ); repaintContents( contentsX(), contentsY(), visibleWidth(), visibleHeight(), false ); emit cursorChanged( QSql::Insert ); } break; } case QSql::No: endInsert(); break; case QSql::Cancel: if ( Q3Table::beginEdit( currentRow(), currentColumn(), false ) ) setEditMode( Editing, currentRow(), currentColumn() ); break; } return ( b > 0 ); } /*! \internal Updates the row \a row. */ void Q3DataTable::updateRow( int row ) { for ( int i = 0; i < numCols(); ++i ) updateCell( row, i ); } /*! For an editable table, issues an update using the cursor's edit buffer. If there is no current cursor or there is no current selection, nothing happens. If confirmEdits() or confirmUpdate() is true, confirmEdit() is called to confirm the update. Returns true if the update succeeded; otherwise returns false. The underlying cursor must have a valid primary index to ensure that a unique record is updated within the database otherwise the database may be changed to an inconsistent state. */ bool Q3DataTable::updateCurrent() { if ( d->dat.mode() != QSql::Update ) return false; if ( sqlCursor()->primaryIndex().count() == 0 ) { #ifdef QT_CHECK_RANGE qWarning("Q3DataTable::updateCurrent: no primary index for %s", sqlCursor()->name().latin1() ); #endif endUpdate(); return false; } if ( !sqlCursor()->canUpdate() ) { #ifdef QT_CHECK_RANGE qWarning("Q3DataTable::updateCurrent: updates not allowed for %s", sqlCursor()->name().latin1() ); #endif endUpdate(); return false; } int b = 0; int conf = QSql::Yes; if ( confirmEdits() || confirmUpdate() ) conf = confirmEdit( QSql::Update ); switch ( conf ) { case QSql::Yes: { #ifndef QT_NO_CURSOR QApplication::setOverrideCursor( Qt::waitCursor ); #endif emit beforeUpdate( d->editBuffer ); b = sqlCursor()->update(); #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif if ( ( !b && !sqlCursor()->isActive() ) || !sqlCursor()->isActive() ) { handleError( sqlCursor()->lastError() ); endUpdate(); refresh(); setCurrentCell( d->editRow, d->editCol ); if ( Q3Table::beginEdit( d->editRow, d->editCol, false ) ) setEditMode( Editing, d->editRow, d->editCol ); } else { emit cursorChanged( QSql::Update ); refresh(); endUpdate(); } break; } case QSql::No: endUpdate(); setEditMode( NotEditing, -1, -1 ); break; case QSql::Cancel: setCurrentCell( d->editRow, d->editCol ); if ( Q3Table::beginEdit( d->editRow, d->editCol, false ) ) setEditMode( Editing, d->editRow, d->editCol ); break; } return ( b > 0 ); } /*! For an editable table, issues a delete on the current cursor's primary index using the values of the currently selected row. If there is no current cursor or there is no current selection, nothing happens. If confirmEdits() or confirmDelete() is true, confirmEdit() is called to confirm the delete. Returns true if the delete succeeded; otherwise false. The underlying cursor must have a valid primary index to ensure that a unique record is deleted within the database otherwise the database may be changed to an inconsistent state. */ bool Q3DataTable::deleteCurrent() { if ( !sqlCursor() || isReadOnly() ) return false; if ( sqlCursor()->primaryIndex().count() == 0 ) { #ifdef QT_CHECK_RANGE qWarning("Q3DataTable::deleteCurrent: no primary index %s", sqlCursor()->name().latin1() ); #endif return false; } if ( !sqlCursor()->canDelete() ) return false; int b = 0; int conf = QSql::Yes; if ( confirmEdits() || confirmDelete() ) conf = confirmEdit( QSql::Delete ); // Have to have this here - the confirmEdit() might pop up a // dialog that causes a repaint which the cursor to the // record it has to repaint. if ( !sqlCursor()->seek( currentRow() ) ) return false; switch ( conf ) { case QSql::Yes:{ #ifndef QT_NO_CURSOR QApplication::setOverrideCursor( Qt::waitCursor ); #endif sqlCursor()->primeDelete(); emit primeDelete( sqlCursor()->editBuffer() ); emit beforeDelete( sqlCursor()->editBuffer() ); b = sqlCursor()->del(); #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif if ( !b ) handleError( sqlCursor()->lastError() ); refresh(); emit cursorChanged( QSql::Delete ); setCurrentCell( currentRow(), currentColumn() ); repaintContents( contentsX(), contentsY(), visibleWidth(), visibleHeight(), false ); verticalHeader()->repaint(); // get rid of trailing garbage } break; case QSql::No: setEditMode( NotEditing, -1, -1 ); break; } return ( b > 0 ); } /*! Protected virtual function which returns a confirmation for an edit of mode \a m. Derived classes can reimplement this function to provide their own confirmation dialog. The default implementation uses a message box which prompts the user to confirm the edit action. */ QSql::Confirm Q3DataTable::confirmEdit( QSql::Op m ) { return d->dat.confirmEdit( this, m ); } /*! Protected virtual function which returns a confirmation for canceling an edit mode of \a m. Derived classes can reimplement this function to provide their own cancel dialog. The default implementation uses a message box which prompts the user to confirm the cancel. */ QSql::Confirm Q3DataTable::confirmCancel( QSql::Op m ) { return d->dat.confirmCancel( this, m ); } /*! Searches the current cursor for a cell containing the string \a str starting at the current cell and working forwards (or backwards if \a backwards is true). If the string is found, the cell containing the string is set as the current cell. If \a caseSensitive is false the case of \a str will be ignored. The search will wrap, i.e. if the first (or if backwards is true, last) cell is reached without finding \a str the search will continue until it reaches the starting cell. If \a str is not found the search will fail and the current cell will remain unchanged. */ void Q3DataTable::find( const QString & str, bool caseSensitive, bool backwards ) { if ( !sqlCursor() ) return; Q3SqlCursor * r = sqlCursor(); QString tmp, text; uint row = currentRow(), startRow = row, col = backwards ? currentColumn() - 1 : currentColumn() + 1; bool wrap = true, found = false; if( str.isEmpty() || str.isNull() ) return; if( !caseSensitive ) tmp = str.lower(); else tmp = str; #ifndef QT_NO_CURSOR QApplication::setOverrideCursor( Qt::waitCursor ); #endif while( wrap ){ while( !found && r->seek( row ) ){ for( int i = col; backwards ? (i >= 0) : (i < (int) numCols()); backwards ? i-- : i++ ) { text = r->value( indexOf( i ) ).toString(); if( !caseSensitive ){ text = text.lower(); } if( text.contains( tmp ) ){ setCurrentCell( row, i ); col = i; found = true; } } if( !backwards ){ col = 0; row++; } else { col = numCols() - 1; row--; } } if( !backwards ){ if( startRow != 0 ){ startRow = 0; } else { wrap = false; } r->first(); row = 0; } else { if( startRow != (uint) (numRows() - 1) ){ startRow = numRows() - 1; } else { wrap = false; } r->last(); row = numRows() - 1; } } #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif } /*! Resets the table so that it displays no data. \sa setSqlCursor() */ void Q3DataTable::reset() { clearCellWidget( currentRow(), currentColumn() ); switch ( d->dat.mode() ) { case QSql::Insert: endInsert(); break; case QSql::Update: endUpdate(); break; default: break; } ensureVisible( 0, 0 ); verticalScrollBar()->setValue(0); setNumRows(0); d->haveAllRows = false; d->continuousEdit = false; d->dat.setMode( QSql::None ); d->editRow = -1; d->editCol = -1; d->insertRowLast = -1; d->insertHeaderLabelLast.clear(); d->cancelMode = false; d->lastAt = -1; d->fld.clear(); d->fldLabel.clear(); d->fldWidth.clear(); d->fldIcon.clear(); d->fldHidden.clear(); if ( sorting() ) horizontalHeader()->setSortIndicator( -1 ); } /*! Returns the index of the field within the current SQL query that is displayed in column \a i. */ int Q3DataTable::indexOf( uint i ) const { Q3DataTablePrivate::ColIndex::ConstIterator it = d->colIndex.at( i ); if ( it != d->colIndex.end() ) return *it; return -1; } /*! Returns true if the table will automatically delete the cursor specified by setSqlCursor(); otherwise returns false. */ bool Q3DataTable::autoDelete() const { return d->cur.autoDelete(); } /*! Sets the cursor auto-delete flag to \a enable. If \a enable is true, the table will automatically delete the cursor specified by setSqlCursor(). If \a enable is false (the default), the cursor will not be deleted. */ void Q3DataTable::setAutoDelete( bool enable ) { d->cur.setAutoDelete( enable ); } /*! \property Q3DataTable::autoEdit \brief whether the data table automatically applies edits The default value for this property is true. When the user begins an insert or update in the table there are two possible outcomes when they navigate to another record: \list 1 \i the insert or update is is performed -- this occurs if autoEdit is true \i the insert or update is abandoned -- this occurs if autoEdit is false \endlist */ void Q3DataTable::setAutoEdit( bool autoEdit ) { d->dat.setAutoEdit( autoEdit ); } bool Q3DataTable::autoEdit() const { return d->dat.autoEdit(); } /*! \property Q3DataTable::nullText \brief the text used to represent NULL values The nullText property will be used to represent NULL values in the table. The default value is provided by the cursor's driver. */ void Q3DataTable::setNullText( const QString& nullText ) { d->nullTxt = nullText; d->nullTxtChanged = true; } QString Q3DataTable::nullText() const { return d->nullTxt; } /*! \property Q3DataTable::trueText \brief the text used to represent true values The trueText property will be used to represent NULL values in the table. The default value is "True". */ void Q3DataTable::setTrueText( const QString& trueText ) { d->trueTxt = trueText; } QString Q3DataTable::trueText() const { return d->trueTxt; } /*! \property Q3DataTable::falseText \brief the text used to represent false values The falseText property will be used to represent NULL values in the table. The default value is "False". */ void Q3DataTable::setFalseText( const QString& falseText ) { d->falseTxt = falseText; } QString Q3DataTable::falseText() const { return d->falseTxt; } /*! \property Q3DataTable::dateFormat \brief the format used for displaying date/time values The dateFormat property is used for displaying date/time values in the table. The default value is Qt::LocalDate. */ void Q3DataTable::setDateFormat( const Qt::DateFormat f ) { d->datefmt = f; } Qt::DateFormat Q3DataTable::dateFormat() const { return d->datefmt; } /*! \property Q3DataTable::numRows \brief the number of rows in the table */ int Q3DataTable::numRows() const { return Q3Table::numRows(); } /*! \reimp The number of rows in the table will be determined by the cursor (see setSqlCursor()), so normally this function should never be called. It is included for completeness. */ void Q3DataTable::setNumRows ( int r ) { Q3Table::setNumRows( r ); } /*! \reimp The number of columns in the table will be determined automatically (see addColumn()), so normally this function should never be called. It is included for completeness. */ void Q3DataTable::setNumCols ( int r ) { Q3Table::setNumCols( r ); } /*! \property Q3DataTable::numCols \brief the number of columns in the table */ int Q3DataTable::numCols() const { return Q3Table::numCols(); } /*! Returns the text in cell \a row, \a col, or an empty string if the cell is empty. If the cell's value is NULL then nullText() will be returned. If the cell does not exist then an empty string is returned. */ QString Q3DataTable::text ( int row, int col ) const { if ( !sqlCursor() ) return QString(); QString s; if ( sqlCursor()->seek( row ) ) s = sqlCursor()->value( indexOf( col ) ).toString(); sqlCursor()->seek( currentRow() ); return s; } /*! Returns the value in cell \a row, \a col, or an invalid value if the cell does not exist or has no value. */ QVariant Q3DataTable::value ( int row, int col ) const { if ( !sqlCursor() ) return QVariant(); QVariant v; if ( sqlCursor()->seek( row ) ) v = sqlCursor()->value( indexOf( col ) ); sqlCursor()->seek( currentRow() ); return v; } /*! \internal Used to update the table when the size of the result set cannot be determined - divide the result set into pages and load the pages as the user moves around in the table. */ void Q3DataTable::loadNextPage() { if ( d->haveAllRows ) return; if ( !sqlCursor() ) return; int pageSize = 0; int lookAhead = 0; if ( height() ) { pageSize = (int)( height() * 2 / 20 ); lookAhead = pageSize / 2; } int startIdx = verticalScrollBar()->value() / 20; int endIdx = startIdx + pageSize + lookAhead; if ( endIdx < numRows() || endIdx < 0 ) return; // check for empty result set if ( sqlCursor()->at() == QSql::BeforeFirst && !sqlCursor()->next() ) { d->haveAllRows = true; return; } while ( endIdx > 0 && !sqlCursor()->seek( endIdx ) ) endIdx--; if ( endIdx != ( startIdx + pageSize + lookAhead ) ) d->haveAllRows = true; // small hack to prevent Q3Table from moving the view when a row // is selected and the contents is resized SelectionMode m = selectionMode(); clearSelection(); setSelectionMode( NoSelection ); setNumRows( endIdx ? endIdx + 1 : 0 ); sqlCursor()->seek( currentRow() ); setSelectionMode( m ); } /*! \internal */ void Q3DataTable::sliderPressed() { disconnect( verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(loadNextPage()) ); } /*! \internal */ void Q3DataTable::sliderReleased() { loadNextPage(); connect( verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(loadNextPage()) ); } /*! Sorts column \a col in ascending order if \a ascending is true (the default); otherwise sorts in descending order. The \a wholeRows parameter is ignored; Q3DataTable always sorts whole rows by the specified column. */ void Q3DataTable::sortColumn ( int col, bool ascending, bool ) { if ( sorting() ) { if ( isEditing() && d->dat.mode() != QSql::None ) endEdit( d->editRow, d->editCol, autoEdit(), false ); if ( !sqlCursor() ) return; QSqlIndex lastSort = sqlCursor()->sort(); QSqlIndex newSort( lastSort.cursorName(), QLatin1String("newSort") ); const QSqlField *field = sqlCursor()->fieldPtr( indexOf( col ) ); if ( field ) newSort.append( *field ); newSort.setDescending( 0, !ascending ); horizontalHeader()->setSortIndicator( col, ascending ); setSort( newSort ); refresh(); } } /*! \reimp */ void Q3DataTable::columnClicked ( int col ) { if ( sorting() ) { if ( !sqlCursor() ) return; QSqlIndex lastSort = sqlCursor()->sort(); bool asc = true; if ( lastSort.count() && lastSort.fieldPtr( 0 )->name() == sqlCursor()->fieldPtr( indexOf( col ) )->name() ) asc = lastSort.isDescending( 0 ); sortColumn( col, asc ); emit currentChanged( sqlCursor() ); } } /*! Repaints the cell at \a row, \a col. */ void Q3DataTable::repaintCell( int row, int col ) { QRect cg = cellGeometry( row, col ); QRect re( QPoint( cg.x() - 2, cg.y() - 2 ), QSize( cg.width() + 4, cg.height() + 4 ) ); repaintContents( re, false ); } /*! \reimp This function renders the cell at \a row, \a col with the value of the corresponding cursor field on the painter \a p. Depending on the table's current edit mode, paintField() is called for the appropriate cursor field. \a cr describes the cell coordinates in the content coordinate system. If \a selected is true the cell has been selected and would normally be rendered differently than an unselected cell. */ void Q3DataTable::paintCell( QPainter * p, int row, int col, const QRect & cr, bool selected, const QColorGroup &cg ) { Q3Table::paintCell( p, row, col, cr, selected, cg ); // empty cell if ( !sqlCursor() ) return; p->setPen( selected ? cg.highlightedText() : cg.text() ); if ( d->dat.mode() != QSql::None ) { if ( row == d->editRow && d->editBuffer ) { paintField( p, d->editBuffer->fieldPtr( indexOf( col ) ), cr, selected ); } else if ( row > d->editRow && d->dat.mode() == QSql::Insert ) { if ( sqlCursor()->seek( row - 1 ) ) paintField( p, sqlCursor()->fieldPtr( indexOf( col ) ), cr, selected ); } else { if ( sqlCursor()->seek( row ) ) paintField( p, sqlCursor()->fieldPtr( indexOf( col ) ), cr, selected ); } } else { if ( sqlCursor()->seek( row ) ) paintField( p, sqlCursor()->fieldPtr( indexOf( col ) ), cr, selected ); } } /*! Paints the \a field on the painter \a p. The painter has already been translated to the appropriate cell's origin where the \a field is to be rendered. \a cr describes the cell coordinates in the content coordinate system. The \a selected parameter is ignored. If you want to draw custom field content you must reimplement paintField() to do the custom drawing. The default implementation renders the \a field value as text. If the field is NULL, nullText() is displayed in the cell. If the field is Boolean, trueText() or falseText() is displayed as appropriate. */ void Q3DataTable::paintField( QPainter * p, const QSqlField* field, const QRect & cr, bool ) { if ( !field ) return; p->drawText( 2,2, cr.width()-4, cr.height()-4, fieldAlignment( field ), fieldToString( field ) ); } /*! Returns the alignment for \a field. */ int Q3DataTable::fieldAlignment( const QSqlField* /*field*/ ) { return Qt::AlignLeft | Qt::AlignVCenter; //## Reggie: add alignment to Q3Table } /*! If the cursor's \a sql driver supports query sizes, the number of rows in the table is set to the size of the query. Otherwise, the table dynamically resizes itself as it is scrolled. If \a sql is not active, it is made active by issuing a select() on the cursor using the \a sql cursor's current filter and current sort. */ void Q3DataTable::setSize( Q3SqlCursor* sql ) { // ### what are the connect/disconnect calls doing here!? move to refresh() if ( sql->driver() && sql->driver()->hasFeature( QSqlDriver::QuerySize ) ) { setVScrollBarMode( Auto ); disconnect( verticalScrollBar(), SIGNAL(sliderPressed()), this, SLOT(sliderPressed()) ); disconnect( verticalScrollBar(), SIGNAL(sliderReleased()), this, SLOT(sliderReleased()) ); disconnect( verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(loadNextPage()) ); if ( numRows() != sql->size() ) setNumRows( sql->size() ); } else { setVScrollBarMode( AlwaysOn ); connect( verticalScrollBar(), SIGNAL(sliderPressed()), this, SLOT(sliderPressed()) ); connect( verticalScrollBar(), SIGNAL(sliderReleased()), this, SLOT(sliderReleased()) ); connect( verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(loadNextPage()) ); setNumRows(0); loadNextPage(); } } /*! Sets \a cursor as the data source for the table. To force the display of the data from \a cursor, use refresh(). If \a autoPopulate is true, columns are automatically created based upon the fields in the \a cursor record. If \a autoDelete is true (the default is false), the table will take ownership of the \a cursor and delete it when appropriate. If the \a cursor is read-only, the table becomes read-only. The table adopts the cursor's driver's definition for representing NULL values as strings. \sa refresh() setReadOnly() setAutoDelete() QSqlDriver::nullText() */ void Q3DataTable::setSqlCursor( Q3SqlCursor* cursor, bool autoPopulate, bool autoDelete ) { setUpdatesEnabled( false ); d->cur.setCursor( 0 ); if ( cursor ) { d->cur.setCursor( cursor, autoDelete ); if ( autoPopulate ) { d->fld.clear(); d->fldLabel.clear(); d->fldWidth.clear(); d->fldIcon.clear(); d->fldHidden.clear(); for ( int i = 0; i < sqlCursor()->count(); ++i ) { addColumn( sqlCursor()->fieldPtr( i )->name(), sqlCursor()->fieldPtr( i )->name() ); setColumnReadOnly( i, sqlCursor()->fieldPtr( i )->isReadOnly() ); } } setReadOnly( sqlCursor()->isReadOnly() ); if ( sqlCursor()->driver() && !d->nullTxtChanged ) setNullText(sqlCursor()->driver()->nullText() ); setAutoDelete( autoDelete ); } else { setNumRows( 0 ); setNumCols( 0 ); } setUpdatesEnabled( true ); } /*! Protected virtual function which is called when an error \a e has occurred on the current cursor(). The default implementation displays a warning message to the user with information about the error. */ void Q3DataTable::handleError( const QSqlError& e ) { d->dat.handleError( this, e ); } /*! \reimp */ void Q3DataTable::keyPressEvent( QKeyEvent* e ) { switch( e->key() ) { case Qt::Key_Left: case Qt::Key_Right: case Qt::Key_Up: case Qt::Key_Down: case Qt::Key_Prior: case Qt::Key_Next: case Qt::Key_Home: case Qt::Key_End: case Qt::Key_F2: case Qt::Key_Enter: case Qt::Key_Return: case Qt::Key_Tab: case Qt::Key_BackTab: Q3Table::keyPressEvent( e ); default: return; } } /*! \reimp */ void Q3DataTable::resizeData ( int ) { } /*! \reimp */ Q3TableItem * Q3DataTable::item ( int, int ) const { return 0; } /*! \reimp */ void Q3DataTable::setItem ( int , int , Q3TableItem * ) { } /*! \reimp */ void Q3DataTable::clearCell ( int , int ) { } /*! \reimp */ void Q3DataTable::setPixmap ( int , int , const QPixmap & ) { } /*! \reimp */ void Q3DataTable::takeItem ( Q3TableItem * ) { } /*! Installs a new SQL editor factory \a f. This enables the user to create and instantiate their own editors for use in cell editing. Note that Q3DataTable takes ownership of this pointer, and will delete it when it is no longer needed or when installEditorFactory() is called again. \sa Q3SqlEditorFactory */ void Q3DataTable::installEditorFactory( Q3SqlEditorFactory * f ) { if( f ) { delete d->editorFactory; d->editorFactory = f; } } /*! Installs a new property map \a m. This enables the user to create and instantiate their own property maps for use in cell editing. Note that Q3DataTable takes ownership of this pointer, and will delete it when it is no longer needed or when installPropertMap() is called again. \sa Q3SqlPropertyMap */ void Q3DataTable::installPropertyMap( Q3SqlPropertyMap* m ) { if ( m ) { delete d->propertyMap; d->propertyMap = m; } } /*! \internal Sets the current selection to \a row, \a col. */ void Q3DataTable::setCurrentSelection( int row, int ) { if ( !sqlCursor() ) return; if ( row == d->lastAt ) return; if ( !sqlCursor()->seek( row ) ) return; d->lastAt = row; emit currentChanged( sqlCursor() ); } void Q3DataTable::updateCurrentSelection() { setCurrentSelection( currentRow(), -1 ); } /*! Returns the currently selected record, or 0 if there is no current selection. The table owns the pointer, so do \e not delete it or otherwise modify it or the cursor it points to. */ QSqlRecord* Q3DataTable::currentRecord() const { if ( !sqlCursor() || currentRow() < 0 ) return 0; if ( !sqlCursor()->seek( currentRow() ) ) return 0; return sqlCursor(); } /*! Sorts column \a col in ascending order. \sa setSorting() */ void Q3DataTable::sortAscending( int col ) { sortColumn( col, true ); } /*! Sorts column \a col in descending order. \sa setSorting() */ void Q3DataTable::sortDescending( int col ) { sortColumn( col, false ); } /*! \fn void Q3DataTable::refresh( Refresh mode ) Refreshes the table. If there is no currently defined cursor (see setSqlCursor()), nothing happens. The \a mode parameter determines which type of refresh will take place. \sa Refresh setSqlCursor() addColumn() */ void Q3DataTable::refresh( Q3DataTable::Refresh mode ) { Q3SqlCursor* cur = sqlCursor(); if ( !cur ) return; bool refreshData = ( (mode & RefreshData) == RefreshData ); bool refreshCol = ( (mode & RefreshColumns) == RefreshColumns ); if ( ( (mode & RefreshAll) == RefreshAll ) ) { refreshData = true; refreshCol = true; } if ( !refreshCol && d->fld.count() && numCols() == 0 ) refreshCol = true; viewport()->setUpdatesEnabled( false ); d->haveAllRows = false; if ( refreshData ) { if ( !d->cur.refresh() && d->cur.cursor() ) { handleError( d->cur.cursor()->lastError() ); } d->lastAt = -1; } if ( refreshCol ) { setNumCols( 0 ); d->colIndex.clear(); if ( d->fld.count() ) { const QSqlField* field = 0; int i; int fpos = -1; for ( i = 0; i < (int)d->fld.count(); ++i ) { if ( cur->fieldPtr( i ) && cur->fieldPtr( i )->name() == d->fld[ i ] ) // if there is a field with the desired name on the desired position // then we take that fpos = i; else // otherwise we take the first field that matches the desired name fpos = cur->position( d->fld[ i ] ); field = cur->fieldPtr( fpos ); if ( field && ( cur->isGenerated( fpos ) || cur->isCalculated( field->name() ) ) ) { setNumCols( numCols() + 1 ); d->colIndex.append( fpos ); setColumnReadOnly( numCols()-1, field->isReadOnly() || isColumnReadOnly( numCols()-1 ) ); horizontalHeader()->setLabel( numCols()-1, d->fldIcon[ i ], d->fldLabel[ i ] ); if ( d->fldHidden[ i ] ) { Q3Table::showColumn( i ); // ugly but necessary Q3Table::hideColumn( i ); } else { Q3Table::showColumn( i ); } if ( d->fldWidth[ i ] > -1 ) Q3Table::setColumnWidth( i, d->fldWidth[i] ); } } } } viewport()->setUpdatesEnabled( true ); viewport()->repaint( false ); horizontalHeader()->repaint(); verticalHeader()->repaint(); setSize( cur ); // keep others aware if ( d->lastAt == -1 ) setCurrentSelection( -1, -1 ); else if ( d->lastAt != currentRow() ) setCurrentSelection( currentRow(), currentColumn() ); if ( cur->isValid() ) emit currentChanged( sqlCursor() ); } /*! Refreshes the table. The cursor is refreshed using the current filter, the current sort, and the currently defined columns. Equivalent to calling refresh( Q3DataTable::RefreshData ). */ void Q3DataTable::refresh() { refresh( RefreshData ); } /*! \internal Selects the record in the table using the current cursor edit buffer and the fields specified by the index \a idx. If \a atHint is specified, it will be used as a hint about where to begin searching. */ bool Q3DataTable::findBuffer( const QSqlIndex& idx, int atHint ) { Q3SqlCursor* cur = sqlCursor(); if ( !cur ) return false; bool found = d->cur.findBuffer( idx, atHint ); if ( found ) setCurrentCell( cur->at(), currentColumn() ); return found; } /*! \internal Returns the string representation of a database field. */ QString Q3DataTable::fieldToString( const QSqlField * field ) { QString text; if ( field->isNull() ) { text = nullText(); } else { QVariant val = field->value(); switch ( val.type() ) { case QVariant::Bool: text = val.toBool() ? d->trueTxt : d->falseTxt; break; case QVariant::Date: text = val.toDate().toString( d->datefmt ); break; case QVariant::Time: text = val.toTime().toString( d->datefmt ); break; case QVariant::DateTime: text = val.toDateTime().toString( d->datefmt ); break; default: text = val.toString(); break; } } return text; } /*! \reimp */ void Q3DataTable::swapColumns( int col1, int col2, bool ) { QString fld = d->fld[ col1 ]; QString fldLabel = d->fldLabel[ col1 ]; QIconSet fldIcon = d->fldIcon[ col1 ]; int fldWidth = d->fldWidth[ col1 ]; d->fld[ col1 ] = d->fld[ col2 ]; d->fldLabel[ col1 ] = d->fldLabel[ col2 ]; d->fldIcon[ col1 ] = d->fldIcon[ col2 ]; d->fldWidth[ col1 ] = d->fldWidth[ col2 ]; d->fld[ col2 ] = fld; d->fldLabel[ col2 ] = fldLabel; d->fldIcon[ col2 ] = fldIcon; d->fldWidth[ col2 ] = fldWidth; int colIndex = d->colIndex[ col1 ]; d->colIndex[ col1 ] = d->colIndex[ col2 ]; d->colIndex[ col2 ] = colIndex; } /*! \reimp */ void Q3DataTable::drawContents( QPainter * p, int cx, int cy, int cw, int ch ) { Q3Table::drawContents( p, cx, cy, cw, ch ); if ( sqlCursor() && currentRow() >= 0 ) sqlCursor()->seek( currentRow() ); } /*! \reimp */ void Q3DataTable::drawContents(QPainter *) { } /*! \reimp */ void Q3DataTable::hideColumn( int col ) { d->fldHidden[col] = true; refresh( RefreshColumns ); } /*! \reimp */ void Q3DataTable::showColumn( int col ) { d->fldHidden[col] = false; refresh( RefreshColumns ); } /*! \reimp */ void Q3DataTable::selectRow(int row) { setCurrentCell(row, currentColumn()); } /*! \fn void Q3DataTable::currentChanged( QSqlRecord* record ) This signal is emitted whenever a new row is selected in the table. The \a record parameter points to the contents of the newly selected record. */ /*! \fn void Q3DataTable::primeInsert( QSqlRecord* buf ) This signal is emitted after the cursor is primed for insert by the table, when an insert action is beginning on the table. The \a buf parameter points to the edit buffer being inserted. Connect to this signal in order to, for example, prime the record buffer with default data values. */ /*! \fn void Q3DataTable::primeUpdate( QSqlRecord* buf ) This signal is emitted after the cursor is primed for update by the table, when an update action is beginning on the table. The \a buf parameter points to the edit buffer being updated. Connect to this signal in order to, for example, provide some visual feedback that the user is in 'edit mode'. */ /*! \fn void Q3DataTable::primeDelete( QSqlRecord* buf ) This signal is emitted after the cursor is primed for delete by the table, when a delete action is beginning on the table. The \a buf parameter points to the edit buffer being deleted. Connect to this signal in order to, for example, record auditing information on deletions. */ /*! \fn void Q3DataTable::beforeInsert( QSqlRecord* buf ) This signal is emitted just before the cursor's edit buffer is inserted into the database. The \a buf parameter points to the edit buffer being inserted. Connect to this signal to, for example, populate a key field with a unique sequence number. */ /*! \fn void Q3DataTable::beforeUpdate( QSqlRecord* buf ) This signal is emitted just before the cursor's edit buffer is updated in the database. The \a buf parameter points to the edit buffer being updated. Connect to this signal when you want to transform the user's data behind-the-scenes. */ /*! \fn void Q3DataTable::beforeDelete( QSqlRecord* buf ) This signal is emitted just before the currently selected record is deleted from the database. The \a buf parameter points to the edit buffer being deleted. Connect to this signal to, for example, copy some of the fields for later use. */ /*! \fn void Q3DataTable::cursorChanged( QSql::Op mode ) This signal is emitted whenever the cursor record was changed due to an edit. The \a mode parameter is the type of edit that just took place. */ #endif QT_END_NAMESPACE