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finished axis grid/text for history plot

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This commit is contained in:
Volker Fischer 2009-05-24 14:11:22 +00:00
parent d17e9422f3
commit 9800baca21
3 changed files with 36 additions and 21 deletions
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4
src/main.cpp
View file

@ -165,8 +165,8 @@ int main ( int argc, char** argv )
// TEST
//CServerLogging ServerLogging;
//exit(1);
CServerLogging ServerLogging;
exit(1);
try

52
src/serverlogging.cpp
View file

@ -31,13 +31,16 @@ CServerLogging::CServerLogging()
int i;
// constants defining the plot properties
const int iYAxisStart = 0;
const int iYAxisEnd = 24;
const int iNumTicksX = 10;
const int iNumTicksY = 5;
const int iPlotWidth = 500;
const int iPlotHeight = 500;
const int iGridFrameOffset = 10;
const int iYAxisStart = 0;
const int iYAxisEnd = 24;
const int iNumTicksX = 9;
const int iNumTicksY = 5;
const int iPlotWidth = 500;
const int iPlotHeight = 500;
const int iGridFrameOffset = 10;
const int iTextOffsetToGrid = 3;
const int iYAxisTextHeight = 20;
const QFont AxisFont ( "Arial", 10 );
const QColor PlotBackgroundColor ( Qt::white ); // white background
const QColor PlotFrameColor ( Qt::black ); // black frame
const QColor PlotGridColor ( Qt::gray ); // gray grid
@ -58,20 +61,28 @@ CServerLogging::CServerLogging()
PlotCanvasRect.x() + iGridFrameOffset,
PlotCanvasRect.y() + iGridFrameOffset,
PlotCanvasRect.width() - 2 * iGridFrameOffset,
PlotCanvasRect.height() - 2 * iGridFrameOffset );
PlotCanvasRect.height() - 2 * iGridFrameOffset - iYAxisTextHeight );
PlotPainter.setPen ( PlotFrameColor );
PlotPainter.drawRect ( PlotGridFrame );
// grid (ticks) for x-axis
const int iXSpace = PlotGridFrame.width() / ( iNumTicksX - 1 );
for ( i = 0; i < ( iNumTicksX - 2 ); i++ )
const int iTextOffsetX = 20;
const int iXSpace = PlotGridFrame.width() / ( iNumTicksX + 1 );
for ( i = 0; i < iNumTicksX; i++ )
{
const int iCurX = PlotGridFrame.x() + iXSpace * ( i + 1 );
// text
PlotPainter.setPen ( PlotTextColor );
// TODO
// text (only every second tick)
if ( !( i % 2 ) )
{
PlotPainter.setPen ( PlotTextColor );
PlotPainter.setFont ( AxisFont );
PlotPainter.drawText (
QPoint ( iCurX - iTextOffsetX,
PlotGridFrame.bottom() + iYAxisTextHeight + iTextOffsetToGrid ),
QDate::currentDate().addDays ( i - iNumTicksX + 1 ).toString ( "dd.MM." ) );
}
// grid
PlotPainter.setPen ( PlotGridColor );
@ -87,10 +98,13 @@ CServerLogging::CServerLogging()
// text
PlotPainter.setPen ( PlotTextColor );
PlotPainter.setFont ( QFont ( "Arial", 10 ) );
PlotPainter.drawText ( QPoint ( PlotGridFrame.x(), iCurY ),
QString().setNum ( ( iYAxisEnd - iYAxisStart ) / iNumTicksY * i ) );
PlotPainter.setFont ( AxisFont );
PlotPainter.drawText ( QPoint (
PlotGridFrame.x() + iTextOffsetToGrid,
iCurY - iTextOffsetToGrid ),
QString().setNum (
( iYAxisEnd - iYAxisStart ) / ( iNumTicksY - 1 ) *
( ( iNumTicksY - 2 ) - i ) ) );
// grid
PlotPainter.setPen ( PlotGridColor );
@ -100,7 +114,7 @@ CServerLogging::CServerLogging()
// save plot as a file
PlotPixmap.save ( "test.jpg", "JPG", 90 );
// save plot as a file
PlotPixmap.save ( "test.jpg", "JPG", 90 );
}

1
src/serverlogging.h
View file

@ -27,6 +27,7 @@
#include <qpixmap.h>
#include <qpainter.h>
#include <qdatetime.h>
#include "global.h"