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649 lines
18 KiB
649 lines
18 KiB
/*
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KSysGuard, the KDE System Guard
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Copyright (c) 1999 - 2002 Chris Schlaeger <cs@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of version 2 of the GNU General Public
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License as published by the Free Software Foundation
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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KSysGuard is currently maintained by Chris Schlaeger <cs@kde.org>.
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Please do not commit any changes without consulting me first. Thanks!
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*/
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#include <math.h>
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#include <string.h>
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#include <tqpainter.h>
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#include <tqpixmap.h>
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#include <kdebug.h>
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#include <tdeglobal.h>
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#include <ksgrd/StyleEngine.h>
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#include "SignalPlotter.h"
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SignalPlotter::SignalPlotter( TQWidget *parent, const char *name )
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: TQWidget( parent, name )
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{
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// Auto deletion does not work for pointer to arrays.
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mBeamData.setAutoDelete( false );
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setBackgroundMode( NoBackground );
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mShowThinFrame = true;
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mSamples = 0;
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mMinValue = mMaxValue = 0.0;
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mUseAutoRange = true;
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mGraphStyle = GRAPH_POLYGON;
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// Anything smaller than this does not make sense.
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setMinimumSize( 16, 16 );
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setSizePolicy( TQSizePolicy( TQSizePolicy::Expanding,
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TQSizePolicy::Expanding, false ) );
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mShowVerticalLines = true;
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mVerticalLinesColor = KSGRD::Style->firstForegroundColor();
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mVerticalLinesDistance = 30;
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mVerticalLinesScroll = true;
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mVerticalLinesOffset = 0;
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mHorizontalScale = 1;
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mShowHorizontalLines = true;
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mHorizontalLinesColor = KSGRD::Style->secondForegroundColor();
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mHorizontalLinesCount = 5;
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mShowLabels = true;
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mShowTopBar = false;
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mFontSize = KSGRD::Style->fontSize();
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mBackgroundColor = KSGRD::Style->backgroundColor();
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}
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SignalPlotter::~SignalPlotter()
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{
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for ( double* p = mBeamData.first(); p; p = mBeamData.next() )
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delete [] p;
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}
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bool SignalPlotter::addBeam( const TQColor &color )
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{
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double* d = new double[ mSamples ];
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memset( d, 0, sizeof(double) * mSamples );
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mBeamData.append( d );
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mBeamColor.append( color );
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return true;
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}
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void SignalPlotter::addSample( const TQValueList<double>& sampleBuf )
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{
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if ( mBeamData.count() != sampleBuf.count() )
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return;
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double* d;
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if ( mUseAutoRange ) {
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double sum = 0;
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for ( d = mBeamData.first(); d; d = mBeamData.next() ) {
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sum += d[ 0 ];
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if ( sum < mMinValue )
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mMinValue = sum;
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if ( sum > mMaxValue )
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mMaxValue = sum;
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}
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}
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/* If the vertical lines are scrolling, increment the offset
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* so they move with the data. The vOffset / hScale confusion
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* is because v refers to Vertical Lines, and h to the horizontal
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* distance between the vertical lines. */
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if ( mVerticalLinesScroll ) {
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mVerticalLinesOffset = ( mVerticalLinesOffset + mHorizontalScale)
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% mVerticalLinesDistance;
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}
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// Shift data buffers one sample down and insert new samples.
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TQValueList<double>::ConstIterator s;
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for ( d = mBeamData.first(), s = sampleBuf.begin(); d; d = mBeamData.next(), ++s ) {
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memmove( d, d + 1, ( mSamples - 1 ) * sizeof( double ) );
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d[ mSamples - 1 ] = *s;
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}
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update();
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}
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void SignalPlotter::reorderBeams( const TQValueList<int>& newOrder )
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{
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if(newOrder.count() != mBeamData.count()) {
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kdDebug() << "Serious problem in move sample" << endl;
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return;
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}
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TQPtrList<double> newBeamData;
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TQValueList<TQColor> newBeamColor;
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for(uint i = 0; i < newOrder.count(); i++) {
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int newIndex = newOrder[i];
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newBeamData.append(mBeamData.at(newIndex));
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newBeamColor.append(*mBeamColor.at(newIndex));
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}
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mBeamData = newBeamData;
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mBeamColor = newBeamColor;
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}
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void SignalPlotter::changeRange( int beam, double min, double max )
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{
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// Only the first beam affects range calculation.
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if ( beam > 1 )
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return;
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mMinValue = min;
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mMaxValue = max;
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}
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TQValueList<TQColor> &SignalPlotter::beamColors()
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{
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return mBeamColor;
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}
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void SignalPlotter::removeBeam( uint pos )
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{
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mBeamColor.remove( mBeamColor.at( pos ) );
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double *p = mBeamData.take( pos );
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delete [] p;
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}
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void SignalPlotter::setTitle( const TQString &title )
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{
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mTitle = title;
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}
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TQString SignalPlotter::title() const
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{
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return mTitle;
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}
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void SignalPlotter::setUseAutoRange( bool value )
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{
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mUseAutoRange = value;
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}
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bool SignalPlotter::useAutoRange() const
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{
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return mUseAutoRange;
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}
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void SignalPlotter::setMinValue( double min )
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{
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mMinValue = min;
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}
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double SignalPlotter::minValue() const
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{
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return ( mUseAutoRange ? 0 : mMinValue );
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}
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void SignalPlotter::setMaxValue( double max )
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{
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mMaxValue = max;
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}
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double SignalPlotter::maxValue() const
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{
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return ( mUseAutoRange ? 0 : mMaxValue );
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}
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void SignalPlotter::setGraphStyle( uint style )
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{
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mGraphStyle = style;
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}
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uint SignalPlotter::graphStyle() const
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{
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return mGraphStyle;
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}
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void SignalPlotter::setHorizontalScale( uint scale )
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{
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if (scale == mHorizontalScale)
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return;
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mHorizontalScale = scale;
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if (isVisible())
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updateDataBuffers();
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}
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int SignalPlotter::horizontalScale() const
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{
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return mHorizontalScale;
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}
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void SignalPlotter::setShowVerticalLines( bool value )
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{
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mShowVerticalLines = value;
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}
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bool SignalPlotter::showVerticalLines() const
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{
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return mShowVerticalLines;
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}
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void SignalPlotter::setVerticalLinesColor( const TQColor &color )
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{
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mVerticalLinesColor = color;
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}
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TQColor SignalPlotter::verticalLinesColor() const
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{
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return mVerticalLinesColor;
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}
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void SignalPlotter::setVerticalLinesDistance( int distance )
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{
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mVerticalLinesDistance = distance;
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}
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int SignalPlotter::verticalLinesDistance() const
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{
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return mVerticalLinesDistance;
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}
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void SignalPlotter::setVerticalLinesScroll( bool value )
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{
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mVerticalLinesScroll = value;
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}
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bool SignalPlotter::verticalLinesScroll() const
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{
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return mVerticalLinesScroll;
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}
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void SignalPlotter::setShowHorizontalLines( bool value )
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{
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mShowHorizontalLines = value;
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}
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bool SignalPlotter::showHorizontalLines() const
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{
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return mShowHorizontalLines;
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}
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void SignalPlotter::setHorizontalLinesColor( const TQColor &color )
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{
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mHorizontalLinesColor = color;
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}
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TQColor SignalPlotter::horizontalLinesColor() const
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{
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return mHorizontalLinesColor;
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}
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void SignalPlotter::setHorizontalLinesCount( int count )
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{
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mHorizontalLinesCount = count;
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}
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int SignalPlotter::horizontalLinesCount() const
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{
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return mHorizontalLinesCount;
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}
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void SignalPlotter::setShowLabels( bool value )
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{
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mShowLabels = value;
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}
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bool SignalPlotter::showLabels() const
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{
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return mShowLabels;
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}
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void SignalPlotter::setShowTopBar( bool value )
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{
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mShowTopBar = value;
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}
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bool SignalPlotter::showTopBar() const
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{
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return mShowTopBar;
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}
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void SignalPlotter::setFontSize( int size )
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{
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mFontSize = size;
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}
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int SignalPlotter::fontSize() const
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{
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return mFontSize;
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}
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void SignalPlotter::setBackgroundColor( const TQColor &color )
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{
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mBackgroundColor = color;
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}
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TQColor SignalPlotter::backgroundColor() const
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{
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return mBackgroundColor;
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}
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void SignalPlotter::resizeEvent( TQResizeEvent* )
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{
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Q_ASSERT( width() > 2 );
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updateDataBuffers();
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}
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void SignalPlotter::updateDataBuffers()
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{
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/* Since the data buffers for the beams are equal in size to the
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* width of the widget minus 2 we have to enlarge or shrink the
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* buffers accordingly when a resize occures. To have a nicer
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* display we try to keep as much data as possible. Data that is
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* lost due to shrinking the buffers cannot be recovered on
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* enlarging though. */
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/* Determine new number of samples first.
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* +0.5 to ensure rounding up
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* +2 for extra data points so there is
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* 1) no wasted space and
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* 2) no loss of precision when drawing the first data point. */
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uint newSampleNum = static_cast<uint>( ( ( width() - 2 ) /
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mHorizontalScale ) + 2.5 );
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// overlap between the old and the new buffers.
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int overlap = kMin( mSamples, newSampleNum );
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for ( uint i = 0; i < mBeamData.count(); ++i ) {
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double* nd = new double[ newSampleNum ];
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// initialize new part of the new buffer
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if ( newSampleNum > (uint)overlap )
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memset( nd, 0, sizeof( double ) * ( newSampleNum - overlap ) );
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// copy overlap from old buffer to new buffer
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memcpy( nd + ( newSampleNum - overlap ), mBeamData.at( i ) +
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( mSamples - overlap ), overlap * sizeof( double ) );
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double *p = mBeamData.take( i );
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delete [] p;
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mBeamData.insert( i, nd );
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}
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mSamples = newSampleNum;
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}
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void SignalPlotter::paintEvent( TQPaintEvent* )
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{
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uint w = width();
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uint h = height();
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/* Do not do repaints when the widget is not yet setup properly. */
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if ( w <= 2 )
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return;
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TQPixmap pm( w, h );
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TQPainter p;
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p.begin( &pm, this );
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pm.fill( mBackgroundColor );
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/* Draw white line along the bottom and the right side of the
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* widget to create a 3D like look. */
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p.setPen( TQColor( colorGroup().light() ) );
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if(mShowThinFrame) {
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p.drawLine( 0, h - 1, w - 1, h - 1 );
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p.drawLine( w - 1, 0, w - 1, h - 1 );
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h--;
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w--;
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p.setClipRect( 0, 0, w, h );
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}
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double range = mMaxValue - mMinValue;
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/* If the range is too small we will force it to 1.0 since it
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* looks a lot nicer. */
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if ( range < 0.000001 )
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range = 1.0;
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double minValue = mMinValue;
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if ( mUseAutoRange ) {
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if ( mMinValue != 0.0 ) {
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double dim = pow( 10, floor( log10( fabs( mMinValue ) ) ) ) / 2;
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if ( mMinValue < 0.0 )
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minValue = dim * floor( mMinValue / dim );
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else
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minValue = dim * ceil( mMinValue / dim );
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range = mMaxValue - minValue;
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if ( range < 0.000001 )
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range = 1.0;
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}
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// Massage the range so that the grid shows some nice values.
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double step = range / (mHorizontalLinesCount+1);
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double dim = pow( 10, floor( log10( step ) ) ) / 2;
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range = dim * ceil( step / dim ) * (mHorizontalLinesCount+1);
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}
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double maxValue = minValue + range;
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int top = 0;
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if ( mShowTopBar && h > ( mFontSize/*top bar size*/ + 2/*padding*/ +5/*smallest reasonable size for a graph*/ ) ) {
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/* Draw horizontal bar with current sensor values at top of display. */
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p.setPen( mHorizontalLinesColor );
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int x0 = w / 2;
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p.setFont( TQFont( p.font().family(), mFontSize ) );
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top = p.fontMetrics().height();
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h -= top;
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int h0 = top - 2; // h0 is our new top. It's at least 5 pixels high
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p.drawText(0, 0, x0, top - 2, Qt::AlignCenter, mTitle );
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p.drawLine( x0 - 1, 1, x0 - 1, h0 );
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p.drawLine( 0, top - 1, w - 2, top - 1 );
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double bias = -minValue;
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double scaleFac = ( w - x0 - 2 ) / range;
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TQValueList<TQColor>::Iterator col;
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col = mBeamColor.begin();
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for ( double* d = mBeamData.first(); d; d = mBeamData.next(), ++col ) {
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int start = x0 + (int)( bias * scaleFac );
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int end = x0 + (int)( ( bias += d[ mSamples - 1 ] ) * scaleFac );
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/* If the rect is wider than 2 pixels we draw only the last
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* pixels with the bright color. The rest is painted with
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* a 50% darker color. */
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if ( end - start > 1 ) {
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p.setPen( (*col).dark( 150 ) );
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p.setBrush( (*col).dark( 150 ) );
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p.drawRect( start, 1, end - start, h0 );
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p.setPen( *col );
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p.drawLine( end, 1, end, h0 );
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} else if ( start - end > 1 ) {
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p.setPen( (*col).dark( 150 ) );
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p.setBrush( (*col).dark( 150 ) );
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p.drawRect( end, 1, start - end, h0 );
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p.setPen( *col );
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p.drawLine( end, 1, end, h0 );
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} else {
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p.setPen( *col );
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p.drawLine( start, 1, start, h0 );
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}
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}
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}
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/* Draw scope-like grid vertical lines */
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if ( mShowVerticalLines && w > 60 ) {
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p.setPen( mVerticalLinesColor );
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for ( uint x = mVerticalLinesOffset; x < ( w - 2 ); x += mVerticalLinesDistance )
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p.drawLine( w - x, top, w - x, h + top - 2 );
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}
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/* In autoRange mode we determine the range and plot the values in
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* one go. This is more efficiently than running through the
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* buffers twice but we do react on recently discarded samples as
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* well as new samples one plot too late. So the range is not
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* correct if the recently discarded samples are larger or smaller
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* than the current extreme values. But we can probably live with
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* this. */
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if ( mUseAutoRange )
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mMinValue = mMaxValue = 0.0;
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/* Plot stacked values */
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double scaleFac = ( h - 2 ) / range;
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if ( mGraphStyle == GRAPH_ORIGINAL ) {
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int xPos = 0;
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for ( int i = 0; i < mSamples; i++, xPos += mHorizontalScale ) {
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double bias = -minValue;
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TQValueList<TQColor>::Iterator col;
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col = mBeamColor.begin();
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double sum = 0.0;
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for ( double* d = mBeamData.first(); d; d = mBeamData.next(), ++col ) {
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if ( mUseAutoRange ) {
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sum += d[ i ];
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if ( sum < mMinValue )
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mMinValue = sum;
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if ( sum > mMaxValue )
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mMaxValue = sum;
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}
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int start = top + h - 2 - (int)( bias * scaleFac );
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int end = top + h - 2 - (int)( ( bias + d[ i ] ) * scaleFac );
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bias += d[ i ];
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/* If the line is longer than 2 pixels we draw only the last
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* 2 pixels with the bright color. The rest is painted with
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* a 50% darker color. */
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if ( end - start > 2 ) {
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p.fillRect( xPos, start, mHorizontalScale, end - start - 1, (*col).dark( 150 ) );
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p.fillRect( xPos, end - 1, mHorizontalScale, 2, *col );
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} else if ( start - end > 2 ) {
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p.fillRect( xPos, start, mHorizontalScale, end - start + 1, (*col).dark( 150 ) );
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p.fillRect( xPos, end + 1, mHorizontalScale, 2, *col );
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} else
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p.fillRect( xPos, start, mHorizontalScale, end - start, *col );
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}
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}
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} else if ( mGraphStyle == GRAPH_POLYGON ) {
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int *prevVals = new int[ mBeamData.count() ];
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int hack[ 4 ];
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hack[ 0 ] = hack[ 1 ] = hack[ 2 ] = hack[ 3 ] = 0;
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int x1 = w - ( ( mSamples + 1 ) * mHorizontalScale );
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for ( int i = 0; i < mSamples; i++ ) {
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TQValueList<TQColor>::Iterator col;
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col = mBeamColor.begin();
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double sum = 0.0;
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int y = top + h - 2;
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int oldY = top + h;
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int oldPrevY = oldY;
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int height = 0;
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int j = 0;
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int jMax = mBeamData.count() - 1;
|
|
x1 += mHorizontalScale;
|
|
int x2 = x1 + mHorizontalScale;
|
|
|
|
for ( double* d = mBeamData.first(); d; d = mBeamData.next(), ++col, j++ ) {
|
|
if ( mUseAutoRange ) {
|
|
sum += d[ i ];
|
|
if ( sum < mMinValue )
|
|
mMinValue = sum;
|
|
if ( sum > mMaxValue )
|
|
mMaxValue = sum;
|
|
}
|
|
height = (int)( ( d[ i ] - minValue ) * scaleFac );
|
|
y -= height;
|
|
|
|
/* If the line is longer than 2 pixels we draw only the last
|
|
* 2 pixels with the bright color. The rest is painted with
|
|
* a 50% darker color. */
|
|
TQPen lastPen = TQPen( p.pen() );
|
|
p.setPen( (*col).dark( 150 ) );
|
|
p.setBrush( (*col).dark( 150 ) );
|
|
TQPointArray pa( 4 );
|
|
int prevY = ( i == 0 ) ? y : prevVals[ j ];
|
|
pa.putPoints( 0, 1, x1, prevY );
|
|
pa.putPoints( 1, 1, x2, y );
|
|
pa.putPoints( 2, 1, x2, oldY );
|
|
pa.putPoints( 3, 1, x1, oldPrevY );
|
|
p.drawPolygon( pa );
|
|
p.setPen( lastPen );
|
|
if ( jMax == 0 ) {
|
|
// draw as normal, no deferred drawing req'd.
|
|
p.setPen( *col );
|
|
p.drawLine( x1, prevY, x2, y );
|
|
} else if ( j == jMax ) {
|
|
// draw previous values and current values
|
|
p.drawLine( hack[ 0 ], hack[ 1 ], hack[ 2 ], hack[ 3 ] );
|
|
p.setPen( *col );
|
|
p.drawLine( x1, prevY, x2, y );
|
|
} else if ( j == 0 ) {
|
|
// save values only
|
|
hack[ 0 ] = x1;
|
|
hack[ 1 ] = prevY;
|
|
hack[ 2 ] = x2;
|
|
hack[ 3 ] = y;
|
|
p.setPen( *col );
|
|
} else {
|
|
p.drawLine( hack[ 0 ], hack[ 1 ], hack[ 2 ], hack[ 3 ] );
|
|
hack[ 0 ] = x1;
|
|
hack[ 1 ] = prevY;
|
|
hack[ 2 ] = x2;
|
|
hack[ 3 ] = y;
|
|
p.setPen( *col );
|
|
}
|
|
|
|
prevVals[ j ] = y;
|
|
oldY = y;
|
|
oldPrevY = prevY;
|
|
}
|
|
}
|
|
|
|
delete[] prevVals;
|
|
}
|
|
|
|
/* Draw horizontal lines and values. Lines are always drawn.
|
|
* Values are only draw when width is greater than 60 */
|
|
if ( mShowHorizontalLines ) {
|
|
p.setPen( mHorizontalLinesColor );
|
|
p.setFont( TQFont( p.font().family(), mFontSize ) );
|
|
TQString val;
|
|
|
|
/* top = 0 or font.height depending on whether there's a topbar or not
|
|
* h = graphing area.height - i.e. the actual space we have to draw inside
|
|
*
|
|
* Note we are drawing from 0,0 as the top left corner. So we have to add on top to get to the top of where we are drawing
|
|
* so top+h is the height of the widget
|
|
*/
|
|
for ( uint y = 1; y <= mHorizontalLinesCount; y++ ) {
|
|
|
|
int y_coord = top + (y * h) / (mHorizontalLinesCount+1); //Make sure it's y*h first to avoid rounding bugs
|
|
p.drawLine( 0, y_coord, w - 2, y_coord );
|
|
|
|
if ( mShowLabels && h > ( mFontSize + 1 ) * ( mHorizontalLinesCount + 1 )
|
|
&& w > 60 ) {
|
|
val = TQString::number(maxValue - (y * range) / (mHorizontalLinesCount+1 ) );
|
|
p.drawText( 6, y_coord - 1, val ); //draw the text one pixel raised above the line
|
|
}
|
|
}
|
|
|
|
//Draw the bottom most (minimum) number as well
|
|
if ( mShowLabels && h > ( mFontSize + 1 ) * ( mHorizontalLinesCount + 1 )
|
|
&& w > 60 ) {
|
|
val = TQString::number( minValue );
|
|
p.drawText( 6, top + h - 2, val );
|
|
}
|
|
}
|
|
|
|
p.end();
|
|
bitBlt( this, 0, 0, &pm );
|
|
}
|
|
|
|
#include "SignalPlotter.moc"
|