void CartesianGrid::drawGrid( PaintContext* context )
{
//qDebug() << "KDChart::CartesianGrid::drawGrid( PaintContext* context ) called";
CartesianCoordinatePlane* plane = dynamic_cast<CartesianCoordinatePlane*>(context->coordinatePlane());
// This plane is used for tranlating the coordinates - not for the data boundaries
PainterSaver p( context->painter() );
plane = dynamic_cast< CartesianCoordinatePlane* >( plane->sharedAxisMasterPlane( context->painter() ) );
Q_ASSERT_X ( plane, "CartesianGrid::drawGrid",
"Bad function call: PaintContext::coodinatePlane() NOT a cartesian plane." );
const GridAttributes gridAttrsX( plane->gridAttributes( Qt::Horizontal ) );
const GridAttributes gridAttrsY( plane->gridAttributes( Qt::Vertical ) );
//qDebug() << "OK:";
if ( !gridAttrsX.isGridVisible() && !gridAttrsY.isGridVisible() ) return;
//qDebug() << "A";
// important: Need to update the calculated mData,
// before we may use it!
updateData( context->coordinatePlane() );
if( plane->axesCalcModeX() == KDChart::AbstractCoordinatePlane::Logarithmic && mData.first().stepWidth == 0.0 )
mData.first().stepWidth = 1.0;
if( plane->axesCalcModeY() == KDChart::AbstractCoordinatePlane::Logarithmic && mData.last().stepWidth == 0.0 )
mData.last().stepWidth = 1.0;
// test for programming errors: critical
Q_ASSERT_X ( mData.count() == 2, "CartesianGrid::drawGrid",
"Error: updateData did not return exactly two dimensions." );
// test for invalid boundaries: non-critical
if( !isBoundariesValid( mData ) ) return;
//qDebug() << "B";
DataDimension dimX = mData.first();
const DataDimension& dimY = mData.last();
// test for other programming errors: critical
Q_ASSERT_X ( dimX.stepWidth, "CartesianGrid::drawGrid",
"Error: updateData returned a Zero step width for the X grid." );
Q_ASSERT_X ( dimY.stepWidth, "CartesianGrid::drawGrid",
"Error: updateData returned a Zero step width for the Y grid." );
qreal numberOfUnitLinesX =
qAbs( dimX.distance() / dimX.stepWidth )
+ (dimX.isCalculated ? 1.0 : 0.0);
qreal numberOfUnitLinesY =
qAbs( dimY.distance() / dimY.stepWidth )
+ (dimY.isCalculated ? 1.0 : 0.0);
//qDebug("numberOfUnitLinesX: %f numberOfUnitLinesY: %f",numberOfUnitLinesX,numberOfUnitLinesY);
// do not draw a Zero size grid (and do not divide by Zero)
if( numberOfUnitLinesX <= 0.0 || numberOfUnitLinesY <= 0.0 ) return;
//qDebug() << "C";
const QPointF p1 = plane->translate( QPointF(dimX.start, dimY.start) );
const QPointF p2 = plane->translate( QPointF(dimX.end, dimY.end) );
//qDebug() << "dimX.isCalculated:" << dimX.isCalculated << "dimY.isCalculated:" << dimY.isCalculated;
//qDebug() << "dimX.start: " << dimX.start << "dimX.end: " << dimX.end;
//qDebug() << "dimY.start: " << dimY.start << "dimY.end: " << dimY.end;
//qDebug() << "p1:" << p1 << " p2:" << p2;
const qreal screenRangeX = qAbs ( p1.x() - p2.x() );
const qreal screenRangeY = qAbs ( p1.y() - p2.y() );
/*
* let us paint the grid at a smaller resolution
* the user can disable at any time
* by setting the grid attribute to false
* Same Value as for Cartesian Axis
*/
static const qreal GridLineDistanceTreshold = 4.0; // <Treshold> pixels between each grid line
const qreal MinimumPixelsBetweenLines =
GridLineDistanceTreshold;
//qDebug() << "x step " << dimX.stepWidth << " y step " << dimY.stepWidth;
//qreal unitFactorX = 1.0;
// qreal unitFactorY = 1.0;
//FIXME(khz): Remove this code, and do the calculation in the grid calc function
if( ! dimX.isCalculated ){
while( screenRangeX / numberOfUnitLinesX <= MinimumPixelsBetweenLines ){
dimX.stepWidth *= 10.0;
dimX.subStepWidth *= 10.0;
numberOfUnitLinesX = qAbs( dimX.distance() / dimX.stepWidth );
}
}
if( dimX.subStepWidth && (screenRangeX / (dimX.distance() / dimX.subStepWidth) <= MinimumPixelsBetweenLines) ){
dimX.subStepWidth = 0.0;
//qDebug() << "de-activating grid sub steps: not enough space";
}
const bool drawUnitLinesX = gridAttrsX.isGridVisible() &&
(screenRangeX / numberOfUnitLinesX > MinimumPixelsBetweenLines);
const bool drawUnitLinesY = gridAttrsY.isGridVisible() &&
(screenRangeY / numberOfUnitLinesY > MinimumPixelsBetweenLines);
const bool isLogarithmicX = dimX.isCalculated && (dimX.calcMode == AbstractCoordinatePlane::Logarithmic );
const bool isLogarithmicY = (dimY.calcMode == AbstractCoordinatePlane::Logarithmic );
/*
while ( !drawUnitLinesX ) {
unitFactorX *= 10.0;
drawUnitLinesX = screenRangeX / (numberOfUnitLinesX / unitFactorX) > MinimumPixelsBetweenLines;
}
while ( !drawUnitLinesY ) {
unitFactorY *= 10.0;
drawUnitLinesY = screenRangeY / (numberOfUnitLinesY / unitFactorY) > MinimumPixelsBetweenLines;
}
*/
const bool drawSubGridLinesX = isLogarithmicX ||
((dimX.subStepWidth != 0.0) &&
(screenRangeX / (numberOfUnitLinesX / dimX.stepWidth * dimX.subStepWidth) > MinimumPixelsBetweenLines) &&
gridAttrsX.isSubGridVisible());
const bool drawSubGridLinesY = isLogarithmicY ||
((dimY.subStepWidth != 0.0) &&
(screenRangeY / (numberOfUnitLinesY / dimY.stepWidth * dimY.subStepWidth) > MinimumPixelsBetweenLines) &&
gridAttrsY.isSubGridVisible());
qreal minValueX = qMin( dimX.start, dimX.end );
qreal maxValueX = qMax( dimX.start, dimX.end );
qreal minValueY = qMin( dimY.start, dimY.end );
qreal maxValueY = qMax( dimY.start, dimY.end );
AbstractGrid::adjustLowerUpperRange( minValueX, maxValueX, dimX.stepWidth, true, true );
AbstractGrid::adjustLowerUpperRange( minValueY, maxValueY, dimY.stepWidth, true, true );
if ( drawSubGridLinesX ) {
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsX.subGridPen() ) );
qreal f = minValueX;
qreal fLogSubstep = minValueX;
int logSubstep = 0;
while ( f <= maxValueX ) {
QPointF topPoint( f, maxValueY );
QPointF bottomPoint( f, minValueY );
topPoint = plane->translate( topPoint );
bottomPoint = plane->translate( bottomPoint );
context->painter()->drawLine( topPoint, bottomPoint );
if ( isLogarithmicX ){
if( logSubstep == 9 ){
fLogSubstep *= ( fLogSubstep > 0.0 ) ? 10.0 : 0.1;
if( fLogSubstep == 0.0 )
fLogSubstep = pow( 10.0, floor( log10( dimX.start ) ) );
logSubstep = 0;
f = fLogSubstep;
}
else
{
f += fLogSubstep;
}
++logSubstep;
}else{
f += dimX.subStepWidth;
}
if(maxValueX == 0 && minValueX == 0)
break;
}
}
if ( drawSubGridLinesY ) {
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsY.subGridPen() ) );
qreal f = minValueY;
qreal fLogSubstep = minValueY;
int logSubstep = 0;
while ( f <= maxValueY ) {
//qDebug() << "sub grid line Y at" << f;
QPointF leftPoint( minValueX, f );
QPointF rightPoint( maxValueX, f );
leftPoint = plane->translate( leftPoint );
rightPoint = plane->translate( rightPoint );
context->painter()->drawLine( leftPoint, rightPoint );
if ( isLogarithmicY ){
if( logSubstep == 9 ){
fLogSubstep *= ( fLogSubstep > 0.0 ) ? 10.0 : 0.1;
if( fLogSubstep == 0.0 )
fLogSubstep = pow( 10.0, floor( log10( dimY.start ) ) );
logSubstep = 0;
f = fLogSubstep;
}
else
{
f += fLogSubstep;
}
++logSubstep;
}else{
f += dimY.subStepWidth;
}
if(maxValueY == 0 && minValueY == 0)
break;
}
}
const bool drawXZeroLineX
= dimX.isCalculated &&
gridAttrsX.zeroLinePen().style() != Qt::NoPen;
const bool drawZeroLineY
= gridAttrsY.zeroLinePen().style() != Qt::NoPen;
const bool drawOuterX = gridAttrsX.isOuterLinesVisible();
const bool drawOuterY = gridAttrsY.isOuterLinesVisible();
const QPointF bottomRightPoint = plane->translate( QPointF( maxValueX, minValueY ) );
if ( drawUnitLinesX || drawXZeroLineX ) {
//qDebug() << "E";
if ( drawUnitLinesX )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsX.gridPen() ) );
// const qreal minX = dimX.start;
qreal f = minValueX;
while ( f <= maxValueX ) {
// PENDING(khz) FIXME: make draving/not drawing of Zero line more sophisticated?:
const bool zeroLineHere = drawXZeroLineX && (f == 0.0);
if ( drawUnitLinesX || zeroLineHere ){
//qDebug("main grid line X at: %f --------------------------",f);
QPointF topPoint( f, maxValueY );
QPointF bottomPoint( f, minValueY );
topPoint = plane->translate( topPoint );
bottomPoint = plane->translate( bottomPoint );
const qreal penWidth = context->painter()->pen().widthF();
if ( zeroLineHere )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsX.zeroLinePen() ) );
if ( drawOuterX || (topPoint.x()> 2 * penWidth && topPoint.x()<bottomRightPoint.x()-2.0 * penWidth) )
context->painter()->drawLine( topPoint, bottomPoint );
if ( zeroLineHere )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsX.gridPen() ) );
}
if ( isLogarithmicX ) {
f *= ( f > 0.0 ) ? 10.0 : 0.1;
if( f == 0.0 )
f = pow( 10.0, floor( log10( dimX.start ) ) );
}
else
f += dimX.stepWidth;
if(maxValueX == 0 && minValueX == 0)
break;
}
// draw the last line if not logarithmic calculation
// we need the in order to get the right grid line painted
// when f + dimX.stepWidth jump over maxValueX
if ( ! isLogarithmicX && drawOuterX )
context->painter()->drawLine( plane->translate( QPointF( maxValueX, maxValueY ) ),
plane->translate( QPointF( maxValueX, minValueY ) ) );
}
if ( drawUnitLinesY || drawZeroLineY ) {
//qDebug() << "F";
if ( drawUnitLinesY )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsY.gridPen() ) );
//const qreal minY = dimY.start;
//qDebug("minY: %f maxValueY: %f dimY.stepWidth: %f",minY,maxValueY,dimY.stepWidth);
qreal f = minValueY;
while ( f <= maxValueY ) {
// PENDING(khz) FIXME: make draving/not drawing of Zero line more sophisticated?:
//qDebug("main grid line Y at: %f",f);
const bool zeroLineHere = (f == 0.0);
if ( drawUnitLinesY || zeroLineHere ){
QPointF leftPoint( minValueX, f );
QPointF rightPoint( maxValueX, f );
leftPoint = plane->translate( leftPoint );
rightPoint = plane->translate( rightPoint );
if ( zeroLineHere )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsY.zeroLinePen() ) );
if ( drawOuterY || (leftPoint.y()>2.0 && leftPoint.y()<bottomRightPoint.y()-2.0) )
context->painter()->drawLine( leftPoint, rightPoint );
if ( zeroLineHere )
context->painter()->setPen( PrintingParameters::scalePen( gridAttrsY.gridPen() ) );
}
if ( isLogarithmicY ) {
f *= ( f > 0.0 ) ? 10.0 : 0.1;
if( f == 0.0 )
f = pow( 10.0, floor( log10( dimY.start ) ) );
}
else
f += dimY.stepWidth;
if(maxValueY == 0 && minValueY == 0)
break;
}
}
//qDebug() << "Z";
}
void NormalLineDiagram::paint( PaintContext* ctx )
{
reverseMapper().clear();
Q_ASSERT( dynamic_cast<CartesianCoordinatePlane*>( ctx->coordinatePlane() ) );
CartesianCoordinatePlane* plane = static_cast<CartesianCoordinatePlane*>( ctx->coordinatePlane() );
const int columnCount = compressor().modelDataColumns();
const int rowCount = compressor().modelDataRows();
if ( columnCount == 0 || rowCount == 0 ) return; // maybe blank out the area?
// FIXME integrate column index retrieval to compressor:
// the compressor should only pass through visiblel columns
// int maxFound = 0;
// { // find the last column number that is not hidden
// for( int column = datasetDimension() - 1;
// column < columnCount;
// column += datasetDimension() )
// if( ! diagram()->isHidden( column ) )
// maxFound = column;
// }
// maxFound = columnCount;
// ^^^ temp
// Reverse order of data sets?
bool rev = diagram()->reverseDatasetOrder();
DataValueTextInfoList textInfoList;
LineAttributesInfoList lineList;
for( int column = rev ? columnCount - 1 : 0;
rev ? (column >= 0) : (column < columnCount);
rev ? --column : ++column ) {
LineAttributes laPreviousCell;
CartesianDiagramDataCompressor::DataPoint lastPoint;
qreal lastAreaBoundingValue = 0;
// Get min. y value, used as lower or upper bounding for area highlighting
const qreal minYValue = qMin(plane->visibleDataRange().bottom(), plane->visibleDataRange().top());
CartesianDiagramDataCompressor::CachePosition previousCellPosition;
for ( int row = 0; row < rowCount; ++row ) {
const CartesianDiagramDataCompressor::CachePosition position( row, column );
// get where to draw the line from:
CartesianDiagramDataCompressor::DataPoint point = compressor().data( position );
const QModelIndex sourceIndex = attributesModel()->mapToSource( point.index );
const LineAttributes laCell = diagram()->lineAttributes( sourceIndex );
const LineAttributes::MissingValuesPolicy policy = laCell.missingValuesPolicy();
// lower or upper bounding for the highlighted area
qreal areaBoundingValue;
if ( laCell.areaBoundingDataset() != -1 ) {
const CartesianDiagramDataCompressor::CachePosition areaBoundingCachePosition( row, laCell.areaBoundingDataset() );
areaBoundingValue = compressor().data( areaBoundingCachePosition ).value;
} else
// Use min. y value (i.e. zero line in most cases) if no bounding dataset is set
areaBoundingValue = minYValue;
if( ISNAN( point.value ) )
{
switch( policy )
{
case LineAttributes::MissingValuesAreBridged:
// we just bridge both values
continue;
case LineAttributes::MissingValuesShownAsZero:
// set it to zero
point.value = 0.0;
break;
case LineAttributes::MissingValuesHideSegments:
// they're just hidden
break;
default:
break;
// hm....
}
}
// area corners, a + b are the line ends:
const QPointF a( plane->translate( QPointF( diagram()->centerDataPoints() ? lastPoint.key + 0.5 : lastPoint.key, lastPoint.value ) ) );
const QPointF b( plane->translate( QPointF( diagram()->centerDataPoints() ? point.key + 0.5 : point.key, point.value ) ) );
const QPointF c( plane->translate( QPointF( diagram()->centerDataPoints() ? lastPoint.key + 0.5 : lastPoint.key, lastAreaBoundingValue ) ) );
const QPointF d( plane->translate( QPointF( diagram()->centerDataPoints() ? point.key + 0.5 : point.key, areaBoundingValue ) ) );
// add the line to the list:
// add data point labels:
const PositionPoints pts = PositionPoints( b, a, d, c );
// if necessary, add the area to the area list:
QList<QPolygonF> areas;
if ( !ISNAN( point.value ) && !ISNAN( lastPoint.value ) && laCell.displayArea() ) {
areas << ( QPolygonF() << a << b << d << c );//polygon;
}
// add the pieces to painting if this is not hidden:
if ( ! point.hidden && !ISNAN( point.value ) )
{
appendDataValueTextInfoToList( diagram(), textInfoList, sourceIndex, &position,
pts, Position::NorthWest, Position::SouthWest,
point.value );
paintAreas( ctx, attributesModel()->mapToSource( lastPoint.index ), areas, laCell.transparency() );
// position 0 is not really painted, since it takes two points to make a line :-)
if( row > 0 && !ISNAN( lastPoint.value ) )
lineList.append( LineAttributesInfo( sourceIndex, a, b ) );
}
// wrap it up:
previousCellPosition = position;
laPreviousCell = laCell;
lastAreaBoundingValue = areaBoundingValue;
lastPoint = point;
}
}
LineAttributes::MissingValuesPolicy policy = LineAttributes::MissingValuesAreBridged; //unused
paintElements( ctx, textInfoList, lineList, policy );
}
void NormalLineDiagram::paint( PaintContext* ctx )
{
reverseMapper().clear();
Q_ASSERT( dynamic_cast<CartesianCoordinatePlane*>( ctx->coordinatePlane() ) );
CartesianCoordinatePlane* plane = static_cast<CartesianCoordinatePlane*>( ctx->coordinatePlane() );
const int columnCount = compressor().modelDataColumns();
const int rowCount = compressor().modelDataRows();
if ( columnCount == 0 || rowCount == 0 ) return; // maybe blank out the area?
// Reverse order of data sets?
bool rev = diagram()->reverseDatasetOrder();
LabelPaintCache lpc;
LineAttributesInfoList lineList;
const int step = rev ? -1 : 1;
const int end = rev ? -1 : columnCount;
for ( int column = rev ? columnCount - 1 : 0; column != end; column += step ) {
LineAttributes laPreviousCell;
CartesianDiagramDataCompressor::DataPoint lastPoint;
qreal lastAreaBoundingValue = 0;
// Get min. y value, used as lower or upper bounding for area highlighting
const qreal minYValue = qMin(plane->visibleDataRange().bottom(), plane->visibleDataRange().top());
CartesianDiagramDataCompressor::CachePosition previousCellPosition;
for ( int row = 0; row < rowCount; ++row ) {
const CartesianDiagramDataCompressor::CachePosition position( row, column );
// get where to draw the line from:
CartesianDiagramDataCompressor::DataPoint point = compressor().data( position );
if ( point.hidden ) {
continue;
}
const QModelIndex sourceIndex = attributesModel()->mapToSource( point.index );
const LineAttributes laCell = diagram()->lineAttributes( sourceIndex );
const LineAttributes::MissingValuesPolicy policy = laCell.missingValuesPolicy();
// lower or upper bounding for the highlighted area
qreal areaBoundingValue;
if ( laCell.areaBoundingDataset() != -1 ) {
const CartesianDiagramDataCompressor::CachePosition areaBoundingCachePosition( row, laCell.areaBoundingDataset() );
areaBoundingValue = compressor().data( areaBoundingCachePosition ).value;
} else {
// Use min. y value (i.e. zero line in most cases) if no bounding dataset is set
areaBoundingValue = minYValue;
}
if ( ISNAN( point.value ) )
{
switch ( policy )
{
case LineAttributes::MissingValuesAreBridged:
// we just bridge both values
continue;
case LineAttributes::MissingValuesShownAsZero:
// set it to zero
point.value = 0.0;
break;
case LineAttributes::MissingValuesHideSegments:
// they're just hidden
break;
default:
break;
// hm....
}
}
if ( !ISNAN( point.value ) ) {
// area corners, a + b are the line ends:
const qreal offset = diagram()->centerDataPoints() ? 0.5 : 0;
const QPointF a( plane->translate( QPointF( lastPoint.key + offset, lastPoint.value ) ) );
const QPointF b( plane->translate( QPointF( point.key + offset, point.value ) ) );
const QPointF c( plane->translate( QPointF( lastPoint.key + offset, lastAreaBoundingValue ) ) );
const QPointF d( plane->translate( QPointF( point.key + offset, areaBoundingValue ) ) );
const PositionPoints pts = PositionPoints( b, a, d, c );
// add label
m_private->addLabel( &lpc, sourceIndex, &position, pts, Position::NorthWest,
Position::NorthWest, point.value );
// add line and area, if switched on and we have a current and previous value
if ( !ISNAN( lastPoint.value ) ) {
lineList.append( LineAttributesInfo( sourceIndex, a, b ) );
if ( laCell.displayArea() ) {
QList<QPolygonF> areas;
areas << ( QPolygonF() << a << b << d << c );
PaintingHelpers::paintAreas( m_private, ctx, attributesModel()->mapToSource( lastPoint.index ),
areas, laCell.transparency() );
}
}
}
previousCellPosition = position;
laPreviousCell = laCell;
lastAreaBoundingValue = areaBoundingValue;
lastPoint = point;
}
}
// paint the lines
PaintingHelpers::paintElements( m_private, ctx, lpc, lineList );
}