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diff --git a/ksysguard/gui/SensorDisplayLib/SignalPlotter.cc b/ksysguard/gui/SensorDisplayLib/SignalPlotter.cc
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+/*
+ KSysGuard, the KDE System Guard
+
+ Copyright (c) 1999 - 2002 Chris Schlaeger <cs@kde.org>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of version 2 of the GNU General Public
+ License as published by the Free Software Foundation
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ KSysGuard is currently maintained by Chris Schlaeger <cs@kde.org>.
+ Please do not commit any changes without consulting me first. Thanks!
+
+*/
+
+#include <math.h>
+#include <string.h>
+
+#include <qpainter.h>
+#include <qpixmap.h>
+
+#include <kdebug.h>
+#include <kglobal.h>
+
+#include <ksgrd/StyleEngine.h>
+
+#include "SignalPlotter.h"
+
+SignalPlotter::SignalPlotter( QWidget *parent, const char *name )
+ : QWidget( parent, name )
+{
+ // Auto deletion does not work for pointer to arrays.
+ mBeamData.setAutoDelete( false );
+
+ setBackgroundMode( NoBackground );
+ mShowThinFrame = true;
+ mSamples = 0;
+ mMinValue = mMaxValue = 0.0;
+ mUseAutoRange = true;
+
+ mGraphStyle = GRAPH_POLYGON;
+
+ // Anything smaller than this does not make sense.
+ setMinimumSize( 16, 16 );
+ setSizePolicy( QSizePolicy( QSizePolicy::Expanding,
+ QSizePolicy::Expanding, false ) );
+
+ mShowVerticalLines = true;
+ mVerticalLinesColor = KSGRD::Style->firstForegroundColor();
+ mVerticalLinesDistance = 30;
+ mVerticalLinesScroll = true;
+ mVerticalLinesOffset = 0;
+ mHorizontalScale = 1;
+
+ mShowHorizontalLines = true;
+ mHorizontalLinesColor = KSGRD::Style->secondForegroundColor();
+ mHorizontalLinesCount = 5;
+
+ mShowLabels = true;
+ mShowTopBar = false;
+ mFontSize = KSGRD::Style->fontSize();
+
+ mBackgroundColor = KSGRD::Style->backgroundColor();
+}
+
+SignalPlotter::~SignalPlotter()
+{
+ for ( double* p = mBeamData.first(); p; p = mBeamData.next() )
+ delete [] p;
+}
+
+bool SignalPlotter::addBeam( const QColor &color )
+{
+ double* d = new double[ mSamples ];
+ memset( d, 0, sizeof(double) * mSamples );
+ mBeamData.append( d );
+ mBeamColor.append( color );
+
+ return true;
+}
+
+void SignalPlotter::addSample( const QValueList<double>& sampleBuf )
+{
+ if ( mBeamData.count() != sampleBuf.count() )
+ return;
+
+ double* d;
+ if ( mUseAutoRange ) {
+ double sum = 0;
+ for ( d = mBeamData.first(); d; d = mBeamData.next() ) {
+ sum += d[ 0 ];
+ if ( sum < mMinValue )
+ mMinValue = sum;
+ if ( sum > mMaxValue )
+ mMaxValue = sum;
+ }
+ }
+
+ /* If the vertical lines are scrolling, increment the offset
+ * so they move with the data. The vOffset / hScale confusion
+ * is because v refers to Vertical Lines, and h to the horizontal
+ * distance between the vertical lines. */
+ if ( mVerticalLinesScroll ) {
+ mVerticalLinesOffset = ( mVerticalLinesOffset + mHorizontalScale)
+ % mVerticalLinesDistance;
+ }
+
+ // Shift data buffers one sample down and insert new samples.
+ QValueList<double>::ConstIterator s;
+ for ( d = mBeamData.first(), s = sampleBuf.begin(); d; d = mBeamData.next(), ++s ) {
+ memmove( d, d + 1, ( mSamples - 1 ) * sizeof( double ) );
+ d[ mSamples - 1 ] = *s;
+ }
+
+ update();
+}
+
+void SignalPlotter::reorderBeams( const QValueList<int>& newOrder )
+{
+ if(newOrder.count() != mBeamData.count()) {
+ kdDebug() << "Serious problem in move sample" << endl;
+ return;
+ }
+ QPtrList<double> newBeamData;
+ QValueList<QColor> newBeamColor;
+
+ for(uint i = 0; i < newOrder.count(); i++) {
+ int newIndex = newOrder[i];
+ newBeamData.append(mBeamData.at(newIndex));
+ newBeamColor.append(*mBeamColor.at(newIndex));
+ }
+ mBeamData = newBeamData;
+ mBeamColor = newBeamColor;
+
+}
+
+void SignalPlotter::changeRange( int beam, double min, double max )
+{
+ // Only the first beam affects range calculation.
+ if ( beam > 1 )
+ return;
+
+ mMinValue = min;
+ mMaxValue = max;
+}
+
+QValueList<QColor> &SignalPlotter::beamColors()
+{
+ return mBeamColor;
+}
+
+void SignalPlotter::removeBeam( uint pos )
+{
+ mBeamColor.remove( mBeamColor.at( pos ) );
+ double *p = mBeamData.take( pos );
+ delete [] p;
+}
+
+void SignalPlotter::setTitle( const QString &title )
+{
+ mTitle = title;
+}
+
+QString SignalPlotter::title() const
+{
+ return mTitle;
+}
+
+void SignalPlotter::setUseAutoRange( bool value )
+{
+ mUseAutoRange = value;
+}
+
+bool SignalPlotter::useAutoRange() const
+{
+ return mUseAutoRange;
+}
+
+void SignalPlotter::setMinValue( double min )
+{
+ mMinValue = min;
+}
+
+double SignalPlotter::minValue() const
+{
+ return ( mUseAutoRange ? 0 : mMinValue );
+}
+
+void SignalPlotter::setMaxValue( double max )
+{
+ mMaxValue = max;
+}
+
+double SignalPlotter::maxValue() const
+{
+ return ( mUseAutoRange ? 0 : mMaxValue );
+}
+
+void SignalPlotter::setGraphStyle( uint style )
+{
+ mGraphStyle = style;
+}
+
+uint SignalPlotter::graphStyle() const
+{
+ return mGraphStyle;
+}
+
+void SignalPlotter::setHorizontalScale( uint scale )
+{
+ if (scale == mHorizontalScale)
+ return;
+
+ mHorizontalScale = scale;
+ if (isVisible())
+ updateDataBuffers();
+}
+
+int SignalPlotter::horizontalScale() const
+{
+ return mHorizontalScale;
+}
+
+void SignalPlotter::setShowVerticalLines( bool value )
+{
+ mShowVerticalLines = value;
+}
+
+bool SignalPlotter::showVerticalLines() const
+{
+ return mShowVerticalLines;
+}
+
+void SignalPlotter::setVerticalLinesColor( const QColor &color )
+{
+ mVerticalLinesColor = color;
+}
+
+QColor SignalPlotter::verticalLinesColor() const
+{
+ return mVerticalLinesColor;
+}
+
+void SignalPlotter::setVerticalLinesDistance( int distance )
+{
+ mVerticalLinesDistance = distance;
+}
+
+int SignalPlotter::verticalLinesDistance() const
+{
+ return mVerticalLinesDistance;
+}
+
+void SignalPlotter::setVerticalLinesScroll( bool value )
+{
+ mVerticalLinesScroll = value;
+}
+
+bool SignalPlotter::verticalLinesScroll() const
+{
+ return mVerticalLinesScroll;
+}
+
+void SignalPlotter::setShowHorizontalLines( bool value )
+{
+ mShowHorizontalLines = value;
+}
+
+bool SignalPlotter::showHorizontalLines() const
+{
+ return mShowHorizontalLines;
+}
+
+void SignalPlotter::setHorizontalLinesColor( const QColor &color )
+{
+ mHorizontalLinesColor = color;
+}
+
+QColor SignalPlotter::horizontalLinesColor() const
+{
+ return mHorizontalLinesColor;
+}
+
+void SignalPlotter::setHorizontalLinesCount( int count )
+{
+ mHorizontalLinesCount = count;
+}
+
+int SignalPlotter::horizontalLinesCount() const
+{
+ return mHorizontalLinesCount;
+}
+
+void SignalPlotter::setShowLabels( bool value )
+{
+ mShowLabels = value;
+}
+
+bool SignalPlotter::showLabels() const
+{
+ return mShowLabels;
+}
+
+void SignalPlotter::setShowTopBar( bool value )
+{
+ mShowTopBar = value;
+}
+
+bool SignalPlotter::showTopBar() const
+{
+ return mShowTopBar;
+}
+
+void SignalPlotter::setFontSize( int size )
+{
+ mFontSize = size;
+}
+
+int SignalPlotter::fontSize() const
+{
+ return mFontSize;
+}
+
+void SignalPlotter::setBackgroundColor( const QColor &color )
+{
+ mBackgroundColor = color;
+}
+
+QColor SignalPlotter::backgroundColor() const
+{
+ return mBackgroundColor;
+}
+
+void SignalPlotter::resizeEvent( QResizeEvent* )
+{
+ Q_ASSERT( width() > 2 );
+
+ updateDataBuffers();
+}
+
+void SignalPlotter::updateDataBuffers()
+{
+ /* Since the data buffers for the beams are equal in size to the
+ * width of the widget minus 2 we have to enlarge or shrink the
+ * buffers accordingly when a resize occures. To have a nicer
+ * display we try to keep as much data as possible. Data that is
+ * lost due to shrinking the buffers cannot be recovered on
+ * enlarging though. */
+
+ /* Determine new number of samples first.
+ * +0.5 to ensure rounding up
+ * +2 for extra data points so there is
+ * 1) no wasted space and
+ * 2) no loss of precision when drawing the first data point. */
+ uint newSampleNum = static_cast<uint>( ( ( width() - 2 ) /
+ mHorizontalScale ) + 2.5 );
+
+ // overlap between the old and the new buffers.
+ int overlap = kMin( mSamples, newSampleNum );
+
+ for ( uint i = 0; i < mBeamData.count(); ++i ) {
+ double* nd = new double[ newSampleNum ];
+
+ // initialize new part of the new buffer
+ if ( newSampleNum > (uint)overlap )
+ memset( nd, 0, sizeof( double ) * ( newSampleNum - overlap ) );
+
+ // copy overlap from old buffer to new buffer
+ memcpy( nd + ( newSampleNum - overlap ), mBeamData.at( i ) +
+ ( mSamples - overlap ), overlap * sizeof( double ) );
+
+ double *p = mBeamData.take( i );
+ delete [] p;
+ mBeamData.insert( i, nd );
+ }
+
+ mSamples = newSampleNum;
+}
+
+void SignalPlotter::paintEvent( QPaintEvent* )
+{
+ uint w = width();
+ uint h = height();
+
+ /* Do not do repaints when the widget is not yet setup properly. */
+ if ( w <= 2 )
+ return;
+
+ QPixmap pm( w, h );
+ QPainter p;
+ p.begin( &pm, this );
+
+ pm.fill( mBackgroundColor );
+ /* Draw white line along the bottom and the right side of the
+ * widget to create a 3D like look. */
+ p.setPen( QColor( colorGroup().light() ) );
+ if(mShowThinFrame) {
+ p.drawLine( 0, h - 1, w - 1, h - 1 );
+ p.drawLine( w - 1, 0, w - 1, h - 1 );
+
+ h--;
+ w--;
+ p.setClipRect( 0, 0, w, h );
+ }
+ double range = mMaxValue - mMinValue;
+
+ /* If the range is too small we will force it to 1.0 since it
+ * looks a lot nicer. */
+ if ( range < 0.000001 )
+ range = 1.0;
+
+ double minValue = mMinValue;
+ if ( mUseAutoRange ) {
+ if ( mMinValue != 0.0 ) {
+ double dim = pow( 10, floor( log10( fabs( mMinValue ) ) ) ) / 2;
+ if ( mMinValue < 0.0 )
+ minValue = dim * floor( mMinValue / dim );
+ else
+ minValue = dim * ceil( mMinValue / dim );
+ range = mMaxValue - minValue;
+ if ( range < 0.000001 )
+ range = 1.0;
+ }
+ // Massage the range so that the grid shows some nice values.
+ double step = range / (mHorizontalLinesCount+1);
+ double dim = pow( 10, floor( log10( step ) ) ) / 2;
+ range = dim * ceil( step / dim ) * (mHorizontalLinesCount+1);
+ }
+ double maxValue = minValue + range;
+
+ int top = 0;
+ if ( mShowTopBar && h > ( mFontSize/*top bar size*/ + 2/*padding*/ +5/*smallest reasonable size for a graph*/ ) ) {
+ /* Draw horizontal bar with current sensor values at top of display. */
+ p.setPen( mHorizontalLinesColor );
+ int x0 = w / 2;
+ p.setFont( QFont( p.font().family(), mFontSize ) );
+ top = p.fontMetrics().height();
+ h -= top;
+ int h0 = top - 2; // h0 is our new top. It's at least 5 pixels high
+ p.drawText(0, 0, x0, top - 2, Qt::AlignCenter, mTitle );
+
+ p.drawLine( x0 - 1, 1, x0 - 1, h0 );
+ p.drawLine( 0, top - 1, w - 2, top - 1 );
+
+ double bias = -minValue;
+ double scaleFac = ( w - x0 - 2 ) / range;
+ QValueList<QColor>::Iterator col;
+ col = mBeamColor.begin();
+ for ( double* d = mBeamData.first(); d; d = mBeamData.next(), ++col ) {
+ int start = x0 + (int)( bias * scaleFac );
+ int end = x0 + (int)( ( bias += d[ mSamples - 1 ] ) * scaleFac );
+ /* If the rect is wider than 2 pixels we draw only the last
+ * pixels with the bright color. The rest is painted with
+ * a 50% darker color. */
+ if ( end - start > 1 ) {
+ p.setPen( (*col).dark( 150 ) );
+ p.setBrush( (*col).dark( 150 ) );
+ p.drawRect( start, 1, end - start, h0 );
+ p.setPen( *col );
+ p.drawLine( end, 1, end, h0 );
+ } else if ( start - end > 1 ) {
+ p.setPen( (*col).dark( 150 ) );
+ p.setBrush( (*col).dark( 150 ) );
+ p.drawRect( end, 1, start - end, h0 );
+ p.setPen( *col );
+ p.drawLine( end, 1, end, h0 );
+ } else {
+ p.setPen( *col );
+ p.drawLine( start, 1, start, h0 );
+ }
+ }
+ }
+
+ /* Draw scope-like grid vertical lines */
+ if ( mShowVerticalLines && w > 60 ) {
+ p.setPen( mVerticalLinesColor );
+ for ( uint x = mVerticalLinesOffset; x < ( w - 2 ); x += mVerticalLinesDistance )
+ p.drawLine( w - x, top, w - x, h + top - 2 );
+ }
+
+ /* In autoRange mode we determine the range and plot the values in
+ * one go. This is more efficiently than running through the
+ * buffers twice but we do react on recently discarded samples as
+ * well as new samples one plot too late. So the range is not
+ * correct if the recently discarded samples are larger or smaller
+ * than the current extreme values. But we can probably live with
+ * this. */
+ if ( mUseAutoRange )
+ mMinValue = mMaxValue = 0.0;
+
+ /* Plot stacked values */
+ double scaleFac = ( h - 2 ) / range;
+ if ( mGraphStyle == GRAPH_ORIGINAL ) {
+ int xPos = 0;
+ for ( int i = 0; i < mSamples; i++, xPos += mHorizontalScale ) {
+ double bias = -minValue;
+ QValueList<QColor>::Iterator col;
+ col = mBeamColor.begin();
+ double sum = 0.0;
+ for ( double* d = mBeamData.first(); d; d = mBeamData.next(), ++col ) {
+ if ( mUseAutoRange ) {
+ sum += d[ i ];
+ if ( sum < mMinValue )
+ mMinValue = sum;
+ if ( sum > mMaxValue )
+ mMaxValue = sum;
+ }
+ int start = top + h - 2 - (int)( bias * scaleFac );
+ int end = top + h - 2 - (int)( ( bias + d[ i ] ) * scaleFac );
+ bias += d[ i ];
+ /* 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. */
+ if ( end - start > 2 ) {
+ p.fillRect( xPos, start, mHorizontalScale, end - start - 1, (*col).dark( 150 ) );
+ p.fillRect( xPos, end - 1, mHorizontalScale, 2, *col );
+ } else if ( start - end > 2 ) {
+ p.fillRect( xPos, start, mHorizontalScale, end - start + 1, (*col).dark( 150 ) );
+ p.fillRect( xPos, end + 1, mHorizontalScale, 2, *col );
+ } else
+ p.fillRect( xPos, start, mHorizontalScale, end - start, *col );
+
+ }
+ }
+ } else if ( mGraphStyle == GRAPH_POLYGON ) {
+ int *prevVals = new int[ mBeamData.count() ];
+ int hack[ 4 ];
+ hack[ 0 ] = hack[ 1 ] = hack[ 2 ] = hack[ 3 ] = 0;
+ int x1 = w - ( ( mSamples + 1 ) * mHorizontalScale );
+
+ for ( int i = 0; i < mSamples; i++ ) {
+ QValueList<QColor>::Iterator col;
+ col = mBeamColor.begin();
+ double sum = 0.0;
+ int y = top + h - 2;
+ int oldY = top + h;
+ int oldPrevY = oldY;
+ int height = 0;
+ int j = 0;
+ 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. */
+ QPen lastPen = QPen( p.pen() );
+ p.setPen( (*col).dark( 150 ) );
+ p.setBrush( (*col).dark( 150 ) );
+ QPointArray 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( QFont( p.font().family(), mFontSize ) );
+ QString 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 = QString::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 = QString::number( minValue );
+ p.drawText( 6, top + h - 2, val );
+ }
+ }
+
+ p.end();
+ bitBlt( this, 0, 0, &pm );
+}
+
+#include "SignalPlotter.moc"
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-10 19:46:02 +0000