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This example shows a sparse table implementation using a TQIntDict to keep track of the cells that are actually in use.
Implementation:
/**************************************************************************** ** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:37 $ ** ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved. ** ** This file is part of an example program for TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include <ntqapplication.h> #include <tqtable.h> // Table size const int numRows = 1000000; const int numCols = 1000000; class MyTable : public TQTable { public: MyTable( int r, int c ) : TQTable( r, c ) { items.setAutoDelete( TRUE ); widgets.setAutoDelete( TRUE ); setCaption( tr( "A 1 Million x 1 Million Cell Table" ) ); setLeftMargin( fontMetrics().width( "W999999W" ) ); } void resizeData( int ) {} TQTableItem *item( int r, int c ) const { return items.find( indexOf( r, c ) ); } void setItem( int r, int c, TQTableItem *i ) { items.replace( indexOf( r, c ), i ); } void clearCell( int r, int c ) { items.remove( indexOf( r, c ) ); } void takeItem( TQTableItem *item ) { items.setAutoDelete( FALSE ); items.remove( indexOf( item->row(), item->col() ) ); items.setAutoDelete( TRUE ); } void insertWidget( int r, int c, TQWidget *w ) { widgets.replace( indexOf( r, c ), w ); } TQWidget *cellWidget( int r, int c ) const { return widgets.find( indexOf( r, c ) ); } void clearCellWidget( int r, int c ) { TQWidget *w = widgets.take( indexOf( r, c ) ); if ( w ) w->deleteLater(); } private: TQIntDict<TQTableItem> items; TQIntDict<TQWidget> widgets; }; // The program starts here. int main( int argc, char **argv ) { TQApplication app( argc, argv ); MyTable table( numRows, numCols ); app.setMainWidget( &table ); table.show(); return app.exec(); }
See also Table Examples.
Copyright © 2007 Trolltech | Trademarks | TQt 3.3.8
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