511 lines
18 KiB
C++
511 lines
18 KiB
C++
/******************************************************************************\
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* Copyright (c) 2004-2020
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*
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* Author(s):
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* Volker Fischer
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* Peter L Jones <pljones@users.sf.net>
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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\******************************************************************************/
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#include "historygraph.h"
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/* Abstract class *************************************************************/
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AHistoryGraph::AHistoryGraph ( const int iMaxDaysHistory ) :
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sFileName ( "" ),
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bDoHistory ( false ),
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vHistoryDataFifo ( NUM_ITEMS_HISTORY ),
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iNumTicksX ( 0 ), // number of days in history
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iHistMaxDays ( iMaxDaysHistory ),
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BackgroundColor ( "white" ), // background
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FrameColor ( "black" ), // frame
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GridColor ( "gray" ), // grid
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TextColor ( "black" ), // text
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MarkerNewColor ( "darkCyan" ), // marker for new connection
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MarkerNewLocalColor ( "blue" ), // marker for new local connection
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MarkerStopColor ( "red" ), // marker for server stop
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canvasRectX ( 0 ),
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canvasRectY ( 0 ),
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canvasRectWidth ( 640 ),
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canvasRectHeight ( 450 ),
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iGridFrameOffset ( 10 ),
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iGridWidthWeekend ( 3 ), // should be an odd value
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iXAxisTextHeight ( 22 ),
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gridFrameX ( canvasRectX + iGridFrameOffset ),
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gridFrameY ( canvasRectY + iGridFrameOffset ),
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gridFrameWidth ( canvasRectWidth - 2 * iGridFrameOffset ),
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gridFrameHeight ( canvasRectHeight - 2 * iGridFrameOffset - iXAxisTextHeight ),
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gridFrameRight ( gridFrameX + gridFrameWidth - 1 ),
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gridFrameBottom ( gridFrameY + gridFrameHeight - 1 ),
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axisFontFamily ( "Arial" ),
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axisFontWeight ( "100" ),
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axisFontSize ( 12 ),
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iYAxisStart ( 0 ),
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iYAxisEnd ( 24 ),
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iNumTicksY ( 5 ),
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iTextOffsetToGrid ( 3 ),
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iTextOffsetX ( 18 ),
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iMarkerSizeNewCon ( 10 ),
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iMarkerSizeServSt ( 6 )
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{
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}
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void AHistoryGraph::Start ( const QString& sNewFileName )
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{
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QTextStream& tsConsoleStream = *( ( new ConsoleWriterFactory() )->get() );
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tsConsoleStream << QString ( "AHistoryGraph::Start ( %1 )" ).arg ( sNewFileName ) << endl; // on console
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if ( !sNewFileName.isEmpty() )
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{
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// save file name
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sFileName = sNewFileName;
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// set enable flag
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bDoHistory = true;
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// enable timer (update once a day)
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TimerDailyUpdate.start ( 3600000 * 24 );
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// initial update (empty graph)
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Update();
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}
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}
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void AHistoryGraph::Add ( const QDateTime& newDateTime, const EHistoryItemType curType )
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{
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if ( bDoHistory )
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{
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// create and add new element in FIFO
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SHistoryData curHistoryData;
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curHistoryData.DateTime = newDateTime;
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curHistoryData.Type = curType;
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vHistoryDataFifo.Add ( curHistoryData );
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}
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}
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void AHistoryGraph::Add ( const QDateTime& newDateTime, const QHostAddress ClientInetAddr )
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{
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if ( bDoHistory )
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{
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// add element to history, distinguish between a local connection
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// and a remote connection
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if ( ( ClientInetAddr == QHostAddress ( "127.0.0.1" ) ) ||
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( ClientInetAddr.toString().left ( 7 ).compare ( "192.168" ) == 0 ) )
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{
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// local connection
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Add ( newDateTime, HIT_LOCAL_CONNECTION );
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}
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else
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{
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// remote connection
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Add ( newDateTime, HIT_REMOTE_CONNECTION );
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}
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}
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}
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void AHistoryGraph::Update ( )
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{
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if ( bDoHistory )
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{
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int i;
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// store current date for reference
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curDate = QDate::currentDate();
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// set oldest date to draw
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QDate minDate = curDate.addDays ( iHistMaxDays * -1 );
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// get oldest date in history
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QDate oldestDate = curDate.addDays ( 1 ); // one day in the future
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const int iNumItemsForHistory = vHistoryDataFifo.Size();
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for ( i = 0; i < iNumItemsForHistory; i++ )
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{
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// only use valid dates
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if ( vHistoryDataFifo[i].DateTime.date().isValid() )
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{
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if ( vHistoryDataFifo[i].DateTime.date() < oldestDate )
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{
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oldestDate = vHistoryDataFifo[i].DateTime.date();
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}
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}
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}
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if ( oldestDate < minDate )
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{
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oldestDate = minDate;
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}
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const int iNumDaysInHistory = -curDate.daysTo ( oldestDate ) + 1;
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// draw frame of the graph
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DrawFrame ( iNumDaysInHistory );
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// add markers
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for ( i = 0; i < iNumItemsForHistory; i++ )
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{
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// only use valid dates
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if ( vHistoryDataFifo[i].DateTime.date().isValid() && ( oldestDate <= vHistoryDataFifo[i].DateTime.date() ) )
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{
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AddMarker ( vHistoryDataFifo[i] );
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}
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}
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// save graph as picture in file
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Save ( sFileName );
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}
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}
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void AHistoryGraph::DrawFrame ( const int iNewNumTicksX )
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{
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int i;
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// store number of x-axis ticks (number of days we want to draw
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// the history for
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iNumTicksX = iNewNumTicksX;
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// Create actual plot region (grid frame) ----------------------------------
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rect( gridFrameX, gridFrameY, gridFrameWidth, gridFrameHeight );
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// calculate step for x-axis ticks so that we get the desired number of
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// ticks -> 5 ticks
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// TODO the following equation does not work as expected but results are acceptable
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// we want to have "floor ( iNumTicksX / 5 )" which is the same as
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// "iNumTicksX / 5" since "iNumTicksX" is an integer variable
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const int iXAxisTickStep = iNumTicksX / 5 + 1;
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// grid (ticks) for x-axis
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dayXSpace = static_cast<double> ( gridFrameWidth ) / ( iNumTicksX + 1 );
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for ( i = 0; i < static_cast<int> ( iNumTicksX ); i++ )
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{
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int iBottomExtraTickLen = 0;
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const int iCurX = gridFrameX + static_cast<int> ( dayXSpace * ( i + 1 ) );
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const QDate curXAxisDate = curDate.addDays ( 0 - static_cast<signed> ( iNumTicksX ) + i + 1 );
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// text (print only every "iXAxisTickStep" tick)
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if ( !( i % iXAxisTickStep ) )
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{
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text ( iCurX - iTextOffsetX, gridFrameBottom + iXAxisTextHeight + iTextOffsetToGrid, curXAxisDate.toString ( "dd.MM." ) );
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iBottomExtraTickLen = 5;
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}
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// regular grid
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line ( iCurX, 1 + gridFrameY, iCurX, gridFrameBottom + iBottomExtraTickLen );
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// different grid width for weekends (overwrite regular grid)
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if ( ( curXAxisDate.dayOfWeek() == 6 ) || // check for Saturday
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( curXAxisDate.dayOfWeek() == 7 ) ) // check for Sunday
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{
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const int iGridWidthWeekendHalf = iGridWidthWeekend / 2;
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line ( iCurX, 1 + gridFrameY + iGridWidthWeekendHalf, iCurX, gridFrameBottom - iGridWidthWeekendHalf, iGridWidthWeekend );
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}
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}
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// grid (ticks) for y-axis, draw iNumTicksY - 2 grid lines and
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// iNumTicksY - 1 text labels (the lowest grid line is the grid frame)
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iYSpace = gridFrameHeight / ( iNumTicksY - 1 );
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for ( i = 0; i < ( static_cast<int> ( iNumTicksY ) - 1 ); i++ )
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{
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const int iCurY = gridFrameY + iYSpace * ( i + 1 );
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// text
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text ( gridFrameX + iTextOffsetToGrid,
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iCurY - iTextOffsetToGrid,
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QString ( "%1:00" ).arg ( ( iYAxisEnd - iYAxisStart ) / ( iNumTicksY - 1 ) * ( ( iNumTicksY - 2 ) - i ) ) );
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// grid (do not overwrite frame)
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if ( i < ( static_cast<int> ( iNumTicksY ) - 2 ) )
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{
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line ( gridFrameX, iCurY, gridFrameRight, iCurY );
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}
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}
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}
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void AHistoryGraph::AddMarker ( const SHistoryData& curHistoryData )
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{
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// calculate x-axis offset (difference of days compared to
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// current date)
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const int iXAxisOffs =
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curDate.daysTo ( curHistoryData.DateTime.date() );
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// check range, if out of range, do not plot anything
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if ( -iXAxisOffs > ( static_cast<signed> ( iNumTicksX ) - 1 ) )
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{
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return;
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}
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// calculate y-axis offset (consider hours and minutes)
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const double dYAxisOffs = 24 - curHistoryData.DateTime.time().hour() -
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static_cast<double> ( curHistoryData.DateTime.time().minute() ) / 60;
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// calculate the actual point in the graph (in pixels)
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int curPointX = gridFrameX + static_cast<int> ( dayXSpace * ( static_cast<signed> ( iNumTicksX ) + iXAxisOffs ) );
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int curPointY = gridFrameY + static_cast<int> ( static_cast<double> (
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gridFrameHeight ) / ( iYAxisEnd - iYAxisStart ) * dYAxisOffs );
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QString curPointColour = MarkerNewColor;
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int curPointSize = iMarkerSizeNewCon;
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// we use different markers for new connection and server stop items
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switch ( curHistoryData.Type )
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{
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case HIT_SERVER_STOP:
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curPointColour = MarkerStopColor;
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curPointSize = iMarkerSizeServSt;
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break;
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case HIT_LOCAL_CONNECTION:
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curPointColour = MarkerNewLocalColor;
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break;
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case HIT_REMOTE_CONNECTION:
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curPointColour = MarkerNewColor;
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break;
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}
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point ( curPointX - curPointSize / 2, curPointY - curPointSize / 2, curPointSize, curPointColour );
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}
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/* JPEG History Graph implementation ******************************************/
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CJpegHistoryGraph::CJpegHistoryGraph ( const int iMaxDaysHistory ) :
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AHistoryGraph ( iMaxDaysHistory ),
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PlotPixmap ( 1, 1, QImage::Format_RGB32 ),
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iAxisFontWeight ( -1 )
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{
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// scale pixmap to correct size
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PlotPixmap = PlotPixmap.scaled ( canvasRectWidth, canvasRectHeight );
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// axisFontWeight is a string matching the CSS2 font-weight definition
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// Thin = 0, // 100
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// ExtraLight = 12, // 200
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// Light = 25, // 300
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// Normal = 50, // 400
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// Medium = 57, // 500
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// DemiBold = 63, // 600
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// Bold = 75, // 700
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// ExtraBold = 81, // 800
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// Black = 87 // 900
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bool ok;
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int weight = axisFontWeight.toInt( &ok );
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if ( !ok )
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{
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if ( !QString ( "normal" ).compare ( axisFontWeight, Qt::CaseSensitivity::CaseInsensitive ) )
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{
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iAxisFontWeight = 50;
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}
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else if ( !QString ( "bold" ).compare ( axisFontWeight, Qt::CaseSensitivity::CaseInsensitive ) )
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{
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weight = 75;
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}
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}
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else
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{
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if ( weight <= 100 ) { iAxisFontWeight = 0; }
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else if ( weight <= 200 ) { iAxisFontWeight = 12; }
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else if ( weight <= 300 ) { iAxisFontWeight = 25; }
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else if ( weight <= 400 ) { iAxisFontWeight = 50; }
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else if ( weight <= 500 ) { iAxisFontWeight = 57; }
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else if ( weight <= 600 ) { iAxisFontWeight = 63; }
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else if ( weight <= 700 ) { iAxisFontWeight = 75; }
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else if ( weight <= 800 ) { iAxisFontWeight = 81; }
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else if ( weight <= 900 ) { iAxisFontWeight = 87; }
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}
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// if all else fails, it's left at -1
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// QTextStream& tsConsoleStream = *( ( new ConsoleWriterFactory() )->get() );
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// tsConsoleStream << "CJpegHistoryGraph" << endl; // on console
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// Connections -------------------------------------------------------------
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QObject::connect ( &TimerDailyUpdate, SIGNAL ( timeout() ),
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this, SLOT ( OnTimerDailyUpdate() ) );
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}
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// Override Update to blank out the plot area each time
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void CJpegHistoryGraph::Update()
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{
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if ( bDoHistory )
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{
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// create JPEG image
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PlotPixmap.fill ( BackgroundColor ); // fill background
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AHistoryGraph::Update();
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}
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}
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void CJpegHistoryGraph::Save ( const QString sFileName )
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{
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// save plot as a file
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PlotPixmap.save ( sFileName, "JPG", 90 );
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}
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void CJpegHistoryGraph::rect ( const unsigned int x, const unsigned int y, const unsigned int width, const unsigned int height )
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{
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QPainter PlotPainter ( &PlotPixmap );
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PlotPainter.setPen ( FrameColor );
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PlotPainter.drawRect ( x, y, width, height );
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}
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void CJpegHistoryGraph::text ( const unsigned int x, const unsigned int y, const QString& value )
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{
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QPainter PlotPainter ( &PlotPixmap );
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PlotPainter.setPen ( TextColor );
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// QFont(const QString &family, int pointSize = -1, int weight = -1, bool italic = false);
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PlotPainter.setFont ( QFont( axisFontFamily, static_cast<int> ( axisFontSize ), iAxisFontWeight ) );
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PlotPainter.drawText ( QPoint ( x, y ), value );
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}
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void CJpegHistoryGraph::line ( const unsigned int x1, const unsigned int y1, const unsigned int x2, const unsigned int y2, const unsigned int strokeWidth )
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{
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QPainter PlotPainter ( &PlotPixmap );
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PlotPainter.setPen ( QPen ( QBrush ( QColor ( GridColor ) ), strokeWidth ) );
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PlotPainter.drawLine ( x1, y1, x2, y2 );
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}
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void CJpegHistoryGraph::point ( const unsigned int x, const unsigned int y, const unsigned int size, const QString& colour )
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{
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QPainter PlotPainter ( &PlotPixmap );
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PlotPainter.setPen ( QPen ( QBrush( QColor ( colour ) ), size ) );
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PlotPainter.drawPoint ( x, y );
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}
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/* SVG History Graph implementation *******************************************/
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CSvgHistoryGraph::CSvgHistoryGraph ( const int iMaxDaysHistory ) :
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AHistoryGraph ( iMaxDaysHistory ),
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svgImage ( "" ),
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svgStreamWriter ( &svgImage )
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{
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// set SVG veiwBox to correct size to ensure correct scaling
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svgRootAttributes.append ( "viewBox",
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QString ( "%1, %2, %3, %4" )
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.arg ( canvasRectX )
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.arg ( canvasRectY )
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.arg ( canvasRectWidth )
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.arg ( canvasRectHeight )
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);
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svgRootAttributes.append ( "xmlns", "http://www.w3.org/2000/svg" );
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svgRootAttributes.append ( "xmlns:xlink", "http://www.w3.org/1999/xlink" );
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// QTextStream& tsConsoleStream = *( ( new ConsoleWriterFactory() )->get() );
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// tsConsoleStream << "CSvgHistoryGraph" << endl; // on console
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// Connections -------------------------------------------------------------
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QObject::connect ( &TimerDailyUpdate, SIGNAL ( timeout() ),
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this, SLOT ( OnTimerDailyUpdate() ) );
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}
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// Override Update to create the fresh SVG stream each time
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void CSvgHistoryGraph::Update()
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{
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if ( bDoHistory )
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{
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// create SVG document
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svgImage = "";
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svgStreamWriter.setAutoFormatting ( true );
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svgStreamWriter.writeStartDocument();
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svgStreamWriter.writeStartElement ( "svg" );
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svgStreamWriter.writeAttributes ( svgRootAttributes );
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AHistoryGraph::Update();
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}
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}
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void CSvgHistoryGraph::Save ( const QString sFileName )
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{
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svgStreamWriter.writeEndDocument();
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QFile outf ( sFileName );
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if ( !outf.open ( QFile::WriteOnly ) )
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{
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throw std::runtime_error ( ( sFileName + " could not be written. Aborting." ).toStdString() );
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}
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QTextStream out ( &outf );
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out << svgImage << endl;
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}
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void CSvgHistoryGraph::rect ( const unsigned int x, const unsigned int y, const unsigned int width, const unsigned int height )
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{
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svgStreamWriter.writeEmptyElement ( "rect" );
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svgStreamWriter.writeAttribute ( "x", QString ( "%1" ).arg ( x ) );
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svgStreamWriter.writeAttribute ( "y", QString ( "%1" ).arg ( y ) );
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svgStreamWriter.writeAttribute ( "width", QString ( "%1" ).arg ( width ) );
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svgStreamWriter.writeAttribute ( "height", QString ( "%1" ).arg ( height ) );
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svgStreamWriter.writeAttribute ( "stroke", FrameColor );
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svgStreamWriter.writeAttribute ( "stroke-width", QString ( "1" ) );
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svgStreamWriter.writeAttribute ( "style", QString ( "fill: none;" ) );
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}
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void CSvgHistoryGraph::text ( const unsigned int x, const unsigned int y, const QString& value )
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{
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svgStreamWriter.writeStartElement ( "text" );
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svgStreamWriter.writeAttribute ( "x", QString ( "%1" ).arg ( x ) );
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svgStreamWriter.writeAttribute ( "y", QString ( "%1" ).arg ( y ) );
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svgStreamWriter.writeAttribute ( "stroke", TextColor );
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svgStreamWriter.writeAttribute ( "font-family", axisFontFamily );
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svgStreamWriter.writeAttribute ( "font-weight", axisFontWeight );
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svgStreamWriter.writeAttribute ( "font-size", QString ( "%1" ).arg ( axisFontSize ) );
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svgStreamWriter.writeCharacters( value );
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svgStreamWriter.writeEndElement();
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}
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void CSvgHistoryGraph::line ( const unsigned int x1, const unsigned int y1, const unsigned int x2, const unsigned int y2, const unsigned int strokeWidth )
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{
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svgStreamWriter.writeEmptyElement ( "line" );
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svgStreamWriter.writeAttribute ( "x1", QString ( "%1" ).arg ( x1 ) );
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svgStreamWriter.writeAttribute ( "y1", QString ( "%1" ).arg ( y1 ) );
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svgStreamWriter.writeAttribute ( "x2", QString ( "%1" ).arg ( x2 ) );
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svgStreamWriter.writeAttribute ( "y2", QString ( "%1" ).arg ( y2 ) );
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svgStreamWriter.writeAttribute ( "stroke", GridColor );
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svgStreamWriter.writeAttribute ( "stroke-width", QString ( "%1" ).arg ( strokeWidth ) );
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}
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void CSvgHistoryGraph::point ( const unsigned int x, const unsigned int y, const unsigned int size, const QString& colour )
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{
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svgStreamWriter.writeEmptyElement ( "rect" );
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svgStreamWriter.writeAttribute ( "x", QString ( "%1" ).arg ( x ) );
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svgStreamWriter.writeAttribute ( "y", QString ( "%1" ).arg ( y ) );
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svgStreamWriter.writeAttribute ( "width", QString ( "%1" ).arg ( size ) );
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svgStreamWriter.writeAttribute ( "height", QString ( "%1" ).arg ( size ) );
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svgStreamWriter.writeAttribute ( "stroke-opacity", "0" );
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svgStreamWriter.writeAttribute ( "fill", colour );
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}
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