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diff --git a/libkdeedu/kdeeduplot/kplotwidget.cpp b/libkdeedu/kdeeduplot/kplotwidget.cpp
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-/***************************************************************************
- kplotwidget.cpp - A widget for plotting in KStars
- -------------------
- begin : Sun 18 May 2003
- copyright : (C) 2003 by Jason Harris
- email : kstars@30doradus.org
- ***************************************************************************/
-
-/***************************************************************************
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- ***************************************************************************/
-
-#include <math.h> //for log10(), pow(), modf()
-#include <kdebug.h>
-#include <tqpainter.h>
-#include <tqpixmap.h>
-
-#include "kplotwidget.h"
-#include "kplotwidget.moc"
-
-KPlotWidget::KPlotWidget( double x1, double x2, double y1, double y2, TQWidget *parent, const char* name )
- : TQWidget( parent, name, WNoAutoErase ),
- dXtick(0.0), dYtick(0.0),
- nmajX(0), nminX(0), nmajY(0), nminY(0),
- ShowTickMarks( true ), ShowTickLabels( true ), ShowGrid( false )
- {
- setBackgroundMode( TQWidget::NoBackground );
-
- //set DataRect
- setLimits( x1, x2, y1, y2 );
- setDefaultPadding();
-
- //Set PixRect (starts at (0,0) because we will translate by leftPadding(), topPadding() )
- PixRect = TQRect( 0, 0, width() - leftPadding() - rightPadding(),
- height() - topPadding() - bottomPadding() );
-
- buffer = new TQPixmap();
-
- //default colors:
- setBGColor( TQColor( "black" ) );
- setFGColor( TQColor( "white" ) );
- setGridColor( TQColor( "grey" ) );
-
- ObjectList.setAutoDelete( true );
-}
-
-KPlotWidget::~KPlotWidget()
-{
- delete (buffer);
-}
-
-void KPlotWidget::setLimits( double x1, double x2, double y1, double y2 ) {
- double XA1, XA2, YA1, YA2;
- if (x2<x1) { XA1=x2; XA2=x1; }
- else { XA1=x1; XA2=x2; }
- if ( y2<y1) { YA1=y2; YA2=y1; }
- else { YA1=y1; YA2=y2; }
-
- DataRect = DRect( XA1, YA1, XA2-XA1, YA2-YA1 );
- updateTickmarks();
-}
-
-void KPlotWidget::updateTickmarks() {
- // Determine the number and spacing of tickmarks for the current plot limits.
- if ( dataWidth() == 0.0 ) {
- kdWarning() << "X range invalid! " << x() << " to " << x2() << endl;
- DataRect.setWidth( 1.0 );
- return;
- }
- if ( dataHeight() == 0.0 ) {
- kdWarning() << "Y range invalid! " << y() << " to " << y2() << endl;
- DataRect.setHeight( 1.0 );
- return;
- }
-
- int nmajor(0), nminor(0);
- double z(0.0), z2(0.0);
- double Range(0.0), s(0.0), t(0.0), pwr(0.0), dTick(0.0);
-
- //loop over X and Y axes...the z variables substitute for either X or Y
- for ( unsigned int iaxis=0; iaxis<2; ++iaxis ) {
- if ( iaxis == 1 ) {
- z = x(); z2 = x2();
- } else {
- z = y(); z2 = y2();
- }
-
- //determine size of region to be drawn, in draw units
- Range = z2 - z;
-
- //s is the power-of-ten factor of Range:
- //Range = t * s; s = 10^(pwr). e.g., Range=350.0 then t=3.5, s = 100.0; pwr = 2.0
- modf( log10(Range), &pwr );
- s = pow( 10.0, pwr );
- t = Range/s;
-
- //adjust s and t such that t is between 3 and 5:
- if ( t < 3.0 ) { t *= 10.0; s /= 10.0; } //t now btwn 3 and 30
- if ( t < 6.0 ) { //accept current values
- dTick = s;
- nmajor = int(t);
- nminor = 5;
- } else if ( t < 10.0 ) { //factor of 2
- dTick = s*2.0;
- nmajor = int(t/2.0);
- nminor = 4;
- } else if ( t < 20.0 ) { //factor of 4
- dTick = s*4.0;
- nmajor = int(t/4.0);
- nminor = 4;
- } else { //factor of 5
- dTick = s*5.0;
- nmajor = int(t/5.0);
- nminor = 5;
- }
-
- if ( iaxis==1 ) { //X axis
- nmajX = nmajor;
- nminX = nminor;
- dXtick = dTick;
- } else { //Y axis
- nmajY = nmajor;
- nminY = nminor;
- dYtick = dTick;
- }
- } //end for iaxis
-}
-
-void KPlotWidget::resizeEvent( TQResizeEvent* /* e */ ) {
- int newWidth = width() - leftPadding() - rightPadding();
- int newHeight = height() - topPadding() - bottomPadding();
- PixRect = TQRect( 0, 0, newWidth, newHeight );
-
- buffer->resize( width(), height() );
-}
-
-void KPlotWidget::paintEvent( TQPaintEvent* /* e */ ) {
- TQPainter p;
-
- p.begin( buffer );
- p.fillRect( 0, 0, width(), height(), bgColor() );
- p.translate( leftPadding(), topPadding() );
-
- drawObjects( &p );
- drawBox( &p );
-
- p.end();
- bitBlt( this, 0, 0, buffer );
-}
-
-void KPlotWidget::drawObjects( TQPainter *p ) {
- for ( KPlotObject *po = ObjectList.first(); po; po = ObjectList.next() ) {
-
- if ( po->points()->count() ) {
- //draw the plot object
- p->setPen( TQColor( po->color() ) );
-
- switch ( po->type() ) {
- case KPlotObject::POINTS :
- {
- p->setBrush( TQColor( po->color() ) );
-
- for ( DPoint *dp = po->points()->first(); dp; dp = po->points()->next() ) {
- TQPoint q = dp->qpoint( PixRect, DataRect );
- int x1 = q.x() - po->size()/2;
- int y1 = q.y() - po->size()/2;
-
- switch( po->param() ) {
- case KPlotObject::CIRCLE : p->drawEllipse( x1, y1, po->size(), po->size() ); break;
- case KPlotObject::SQUARE : p->drawRect( x1, y1, po->size(), po->size() ); break;
- case KPlotObject::LETTER : p->drawText( q, po->name().left(1) ); break;
- default: p->drawPoint( q );
- }
- }
-
- p->setBrush( TQt::NoBrush );
- break;
- }
-
- case KPlotObject::CURVE :
- {
- p->setPen( TQPen( TQColor( po->color() ), po->size(), (TQPen::PenStyle)po->param() ) );
- DPoint *dp = po->points()->first();
- p->moveTo( dp->qpoint( PixRect, DataRect ) );
- for ( dp = po->points()->next(); dp; dp = po->points()->next() )
- p->lineTo( dp->qpoint( PixRect, DataRect ) );
- break;
- }
-
- case KPlotObject::LABEL : //draw label centered at point in x, and slightly below point in y.
- {
- TQPoint q = po->points()->first()->qpoint( PixRect, DataRect );
- p->drawText( q.x()-20, q.y()+6, 40, 10, TQt::AlignCenter | TQt::DontClip, po->name() );
- break;
- }
-
- case KPlotObject::POLYGON :
- {
- p->setPen( TQPen( TQColor( po->color() ), po->size(), (TQPen::PenStyle)po->param() ) );
- p->setBrush( TQColor( po->color() ) );
-
- TQPointArray a( po->count() );
-
- unsigned int i=0;
- for ( DPoint *dp = po->points()->first(); dp; dp = po->points()->next() )
- a.setPoint( i++, dp->qpoint( PixRect, DataRect ) );
-
- p->drawPolygon( a );
- break;
- }
-
- case KPlotObject::UNKNOWN_TYPE : break;
- }
- }
- }
-}
-
-double KPlotWidget::dmod( double a, double b ) { return ( b * ( ( a / b ) - int( a / b ) ) ); }
-
-void KPlotWidget::drawBox( TQPainter *p ) {
- //First, fill in padding region with bgColor() to mask out-of-bounds plot data
- p->setPen( bgColor() );
- p->setBrush( bgColor() );
-
- //left padding ( don't forget: we have translated by XPADDING, YPADDING )
- p->drawRect( -leftPadding(), -topPadding(), leftPadding(), height() );
-
- //right padding
- p->drawRect( PixRect.width(), -topPadding(), rightPadding(), height() );
-
- //top padding
- p->drawRect( 0, -topPadding(), PixRect.width(), topPadding() );
-
- //bottom padding
- p->drawRect( 0, PixRect.height(), PixRect.width(), bottomPadding() );
-
- if ( ShowGrid ) {
- //Grid lines are placed at locations of primary axes' major tickmarks
- p->setPen( gridColor() );
-
- //vertical grid lines
- double x0 = x() - dmod( x(), dXtick ); //zeropoint; x(i) is this plus i*dXtick1
- for ( int ix = 0; ix <= nmajX+1; ix++ ) {
- int px = int( PixRect.width() * ( (x0 + ix*dXtick - x())/dataWidth() ) );
- p->drawLine( px, 0, px, PixRect.height() );
- }
-
- //horizontal grid lines
- double y0 = y() - dmod( y(), dYtick ); //zeropoint; y(i) is this plus i*mX
- for ( int iy = 0; iy <= nmajY+1; iy++ ) {
- int py = PixRect.height() - int( PixRect.height() * ( (y0 + iy*dYtick - y())/dataHeight() ) );
- p->drawLine( 0, py, PixRect.width(), py );
- }
- }
-
- p->setPen( fgColor() );
- p->setBrush( TQt::NoBrush );
-
- if (BottomAxis.isVisible() || LeftAxis.isVisible()) p->drawRect( PixRect ); //box outline
-
- if ( ShowTickMarks ) {
- //spacing between minor tickmarks (in data units)
- double dminX = dXtick/nminX;
- double dminY = dYtick/nminY;
-
- //set small font for tick labels
- TQFont f = p->font();
- int s = f.pointSize();
- f.setPointSize( s - 2 );
- p->setFont( f );
-
- //--- Draw bottom X Axis ---//
- if (BottomAxis.isVisible()) {
- // Draw X tickmarks
- double x0 = x() - dmod( x(), dXtick ); //zeropoint; tickmark i is this plus i*dXtick (in data units)
- if ( x() < 0.0 ) x0 -= dXtick;
-
- for ( int ix = 0; ix <= nmajX+1; ix++ ) {
- //position of tickmark i (in screen units)
- int px = int( PixRect.width() * ( (x0 + ix*dXtick - x() )/dataWidth() ) );
-
- if ( px > 0 && px < PixRect.width() ) {
- p->drawLine( px, PixRect.height() - 2, px, PixRect.height() - BIGTICKSIZE - 2 );
- p->drawLine( px, 0, px, BIGTICKSIZE );
- }
-
- //tick label
- if ( ShowTickLabels ) {
- double lab = x0 + ix*dXtick;
- if ( fabs(lab)/dXtick < 0.00001 ) lab = 0.0; //fix occassional roundoff error with "0.0" label
-
- TQString str = TQString( "%1" ).tqarg( lab, BottomAxis.labelFieldWidth(), BottomAxis.labelFmt(), BottomAxis.labelPrec() );
- if ( px > 0 && px < PixRect.width() ) {
- TQRect r( px - BIGTICKSIZE, PixRect.height()+BIGTICKSIZE, 2*BIGTICKSIZE, BIGTICKSIZE );
- p->drawText( r, TQt::AlignCenter | TQt::DontClip, str );
- }
- }
-
- //draw minor ticks
- for ( int j=0; j < nminX; j++ ) {
- //position of minor tickmark j (in screen units)
- int pmin = int( px + PixRect.width()*j*dminX/dataWidth() );
-
- if ( pmin > 0 && pmin < PixRect.width() ) {
- p->drawLine( pmin, PixRect.height() - 2, pmin, PixRect.height() - SMALLTICKSIZE - 2 );
- p->drawLine( pmin, 0, pmin, SMALLTICKSIZE );
- }
- }
- } // end draw X tickmarks
-
- // Draw X Axis Label
- if ( ! BottomAxis.label().isEmpty() ) {
- TQRect r( 0, PixRect.height() + 2*YPADDING, PixRect.width(), YPADDING );
- p->drawText( r, TQt::AlignCenter, BottomAxis.label() );
- }
-
- }
-
- //--- Draw left Y Axis ---//
- if (LeftAxis.isVisible()) {
- // Draw Y tickmarks
- double y0 = y() - dmod( y(), dYtick ); //zeropoint; tickmark i is this plus i*dYtick1 (in data units)
- if ( y() < 0.0 ) y0 -= dYtick;
-
- for ( int iy = 0; iy <= nmajY+1; iy++ ) {
- //position of tickmark i (in screen units)
- int py = PixRect.height() - int( PixRect.height() * ( (y0 + iy*dYtick - y())/dataHeight() ) );
- if ( py > 0 && py < PixRect.height() ) {
- p->drawLine( 0, py, BIGTICKSIZE, py );
- p->drawLine( PixRect.width()-2, py, PixRect.width()-BIGTICKSIZE-2, py );
- }
-
- //tick label
- if ( ShowTickLabels ) {
- double lab = y0 + iy*dYtick;
- if ( fabs(lab)/dYtick < 0.00001 ) lab = 0.0; //fix occassional roundoff error with "0.0" label
-
- TQString str = TQString( "%1" ).tqarg( lab, LeftAxis.labelFieldWidth(), LeftAxis.labelFmt(), LeftAxis.labelPrec() );
- if ( py > 0 && py < PixRect.height() ) {
- TQRect r( -2*BIGTICKSIZE, py-SMALLTICKSIZE, 2*BIGTICKSIZE, 2*SMALLTICKSIZE );
- p->drawText( r, TQt::AlignCenter | TQt::DontClip, str );
- }
- }
-
- //minor ticks
- for ( int j=0; j < nminY; j++ ) {
- //position of minor tickmark j (in screen units)
- int pmin = int( py - PixRect.height()*j*dminY/dataHeight() );
- if ( pmin > 0 && pmin < PixRect.height() ) {
- p->drawLine( 0, pmin, SMALLTICKSIZE, pmin );
- p->drawLine( PixRect.width()-2, pmin, PixRect.width()-SMALLTICKSIZE-2, pmin );
- }
- }
- } // end draw Y tickmarks
-
- //Draw Y Axis Label. We need to draw the text sideways.
- if ( ! LeftAxis.label().isEmpty() ) {
- //store current painter translation/rotation state
- p->save();
-
- //translate coord sys to left corner of axis label rectangle, then rotate 90 degrees.
- p->translate( -3*XPADDING, PixRect.height() );
- p->rotate( -90.0 );
-
- TQRect r( 0, 0, PixRect.height(), XPADDING );
- p->drawText( r, TQt::AlignCenter, LeftAxis.label() ); //draw the label, now that we are sideways
-
- p->restore(); //restore translation/rotation state
- }
- }
-
- } //end if ( ShowTickMarks )
-
-
-}
-
-int KPlotWidget::leftPadding() const {
- if ( LeftPadding >= 0 ) return LeftPadding;
- if ( ! LeftAxis.label().isEmpty() && ShowTickLabels ) return 3*XPADDING;
- if ( ! LeftAxis.label().isEmpty() || ShowTickLabels ) return 2*XPADDING;
- return XPADDING;
-}
-
-int KPlotWidget::rightPadding() const {
- if ( RightPadding >= 0 ) return RightPadding;
- return XPADDING;
-}
-
-int KPlotWidget::topPadding() const {
- if ( TopPadding >= 0 ) return TopPadding;
- return YPADDING;
-}
-
-int KPlotWidget::bottomPadding() const {
- if ( BottomPadding >= 0 ) return BottomPadding;
- if ( ! BottomAxis.label().isEmpty() && ShowTickLabels ) return 3*YPADDING;
- if ( ! BottomAxis.label().isEmpty() || ShowTickLabels ) return 2*YPADDING;
- return YPADDING;
-}
-
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