void QgsComposerRuler::paintEvent( QPaintEvent* event )
{
Q_UNUSED( event );
if ( !mComposition )
{
return;
}
QPainter p( this );
QTransform t = mTransform.inverted();
p.setFont( *mRulerFont );
//find optimum scale for ruler (size of numbered divisions)
int magnitude = 1;
int multiple = 1;
int mmDisplay;
mmDisplay = optimumScale( mScaleMinPixelsWidth, magnitude, multiple );
//find optimum number of small divisions
int numSmallDivisions = optimumNumberDivisions( mmDisplay, multiple );
if ( mDirection == Horizontal )
{
if ( qgsDoubleNear( width(), 0 ) )
{
return;
}
//start x-coordinate
double startX = t.map( QPointF( 0, 0 ) ).x();
double endX = t.map( QPointF( width(), 0 ) ).x();
//start marker position in mm
double markerPos = ( floor( startX / mmDisplay ) + 1 ) * mmDisplay;
//draw minor ticks marks which occur before first major tick
drawSmallDivisions( &p, markerPos, numSmallDivisions, -mmDisplay );
while ( markerPos <= endX )
{
double pixelCoord = mTransform.map( QPointF( markerPos, 0 ) ).x();
//draw large division and text
p.drawLine( pixelCoord, 0, pixelCoord, mRulerMinSize );
p.drawText( QPointF( pixelCoord + mPixelsBetweenLineAndText, mTextBaseline ), QString::number( markerPos ) );
//draw small divisions
drawSmallDivisions( &p, markerPos, numSmallDivisions, mmDisplay, endX );
markerPos += mmDisplay;
}
}
else //vertical
{
if ( qgsDoubleNear( height(), 0 ) )
{
return;
}
double startY = t.map( QPointF( 0, 0 ) ).y(); //start position in mm (total including space between pages)
double endY = t.map( QPointF( 0, height() ) ).y(); //stop position in mm (total including space between pages)
int startPage = ( int )( startY / ( mComposition->paperHeight() + mComposition->spaceBetweenPages() ) );
if ( startPage < 0 )
{
startPage = 0;
}
if ( startY < 0 )
{
double beforePageCoord = -mmDisplay;
double firstPageY = mTransform.map( QPointF( 0, 0 ) ).y();
//draw negative rulers which fall before first page
while ( beforePageCoord > startY )
{
double pixelCoord = mTransform.map( QPointF( 0, beforePageCoord ) ).y();
p.drawLine( 0, pixelCoord, mRulerMinSize, pixelCoord );
//calc size of label
QString label = QString::number( beforePageCoord );
int labelSize = mRulerFontMetrics->width( label );
//draw label only if it fits in before start of next page
if ( pixelCoord + labelSize + 8 < firstPageY )
{
drawRotatedText( &p, QPointF( mTextBaseline, pixelCoord + mMinSpacingVerticalLabels + labelSize ), label );
}
//draw small divisions
drawSmallDivisions( &p, beforePageCoord, numSmallDivisions, mmDisplay );
beforePageCoord -= mmDisplay;
}
//draw minor ticks marks which occur before first major tick
drawSmallDivisions( &p, beforePageCoord + mmDisplay, numSmallDivisions, -mmDisplay, startY );
}
int endPage = ( int )( endY / ( mComposition->paperHeight() + mComposition->spaceBetweenPages() ) );
if ( endPage > ( mComposition->numPages() - 1 ) )
{
endPage = mComposition->numPages() - 1;
}
double nextPageStartPos = 0;
int nextPageStartPixel = 0;
for ( int i = startPage; i <= endPage; ++i )
{
double pageCoord = 0; //page coordinate in mm
//total (composition) coordinate in mm, including space between pages
double totalCoord = i * ( mComposition->paperHeight() + mComposition->spaceBetweenPages() );
//position of next page
if ( i < endPage )
{
//not the last page
nextPageStartPos = ( i + 1 ) * ( mComposition->paperHeight() + mComposition->spaceBetweenPages() );
nextPageStartPixel = mTransform.map( QPointF( 0, nextPageStartPos ) ).y();
}
else
{
//is the last page
nextPageStartPos = 0;
nextPageStartPixel = 0;
}
while (( totalCoord < nextPageStartPos ) || (( nextPageStartPos == 0 ) && ( totalCoord <= endY ) ) )
{
double pixelCoord = mTransform.map( QPointF( 0, totalCoord ) ).y();
p.drawLine( 0, pixelCoord, mRulerMinSize, pixelCoord );
//calc size of label
QString label = QString::number( pageCoord );
int labelSize = mRulerFontMetrics->width( label );
//draw label only if it fits in before start of next page
if (( pixelCoord + labelSize + 8 < nextPageStartPixel )
|| ( nextPageStartPixel == 0 ) )
{
drawRotatedText( &p, QPointF( mTextBaseline, pixelCoord + mMinSpacingVerticalLabels + labelSize ), label );
}
//draw small divisions
drawSmallDivisions( &p, totalCoord, numSmallDivisions, mmDisplay, nextPageStartPos );
pageCoord += mmDisplay;
totalCoord += mmDisplay;
}
}
}
//draw current marker pos
drawMarkerPos( &p );
}
void QgsLayoutRuler::paintEvent( QPaintEvent *event )
{
Q_UNUSED( event );
if ( !mView || !mView->currentLayout() )
{
return;
}
QgsLayout *layout = mView->currentLayout();
QPainter p( this );
drawGuideMarkers( &p, layout );
QTransform t = mTransform.inverted();
p.setFont( mRulerFont );
// keep same default color, but lower opacity a tad
QBrush brush = p.brush();
QColor color = brush.color();
color.setAlphaF( 0.7 );
brush.setColor( color );
p.setBrush( brush );
QPen pen = p.pen();
color = pen.color();
color.setAlphaF( 0.7 );
pen.setColor( color );
p.setPen( pen );
//find optimum scale for ruler (size of numbered divisions)
int magnitude = 1;
int multiple = 1;
int mmDisplay = optimumScale( mScaleMinPixelsWidth, magnitude, multiple );
//find optimum number of small divisions
int numSmallDivisions = optimumNumberDivisions( mmDisplay, multiple );
switch ( mOrientation )
{
case Qt::Horizontal:
{
if ( qgsDoubleNear( width(), 0 ) )
{
return;
}
//start x-coordinate
double startX = t.map( QPointF( 0, 0 ) ).x();
double endX = t.map( QPointF( width(), 0 ) ).x();
//start marker position in mm
double markerPos = ( std::floor( startX / mmDisplay ) + 1 ) * mmDisplay;
//draw minor ticks marks which occur before first major tick
drawSmallDivisions( &p, markerPos, numSmallDivisions, -mmDisplay );
while ( markerPos <= endX )
{
double pixelCoord = mTransform.map( QPointF( markerPos, 0 ) ).x();
//draw large division and text
p.drawLine( pixelCoord, 0, pixelCoord, mRulerMinSize );
p.drawText( QPointF( pixelCoord + mPixelsBetweenLineAndText, mTextBaseline ), QString::number( markerPos ) );
//draw small divisions
drawSmallDivisions( &p, markerPos, numSmallDivisions, mmDisplay, endX );
markerPos += mmDisplay;
}
break;
}
case Qt::Vertical:
{
if ( qgsDoubleNear( height(), 0 ) )
{
return;
}
double startY = t.map( QPointF( 0, 0 ) ).y(); //start position in mm (total including space between pages)
double endY = t.map( QPointF( 0, height() ) ).y(); //stop position in mm (total including space between pages)
// work out start page
int startPage = 0;
int endPage = 0;
double currentY = 0;
double currentPageY = 0;
for ( int page = 0; page < layout->pageCollection()->pageCount(); ++page )
{
if ( currentY < startY )
{
startPage = page;
currentPageY = currentY;
}
endPage = page;
currentY += layout->pageCollection()->page( startPage )->rect().height() + layout->pageCollection()->spaceBetweenPages();
if ( currentY > endY )
break;
}
if ( startY < 0 )
{
double beforePageCoord = -mmDisplay;
double firstPageY = mTransform.map( QPointF( 0, 0 ) ).y();
//draw negative rulers which fall before first page
while ( beforePageCoord > startY )
{
double pixelCoord = mTransform.map( QPointF( 0, beforePageCoord ) ).y();
p.drawLine( 0, pixelCoord, mRulerMinSize, pixelCoord );
//calc size of label
QString label = QString::number( beforePageCoord );
int labelSize = mRulerFontMetrics->width( label );
//draw label only if it fits in before start of next page
if ( pixelCoord + labelSize + 8 < firstPageY )
{
drawRotatedText( &p, QPointF( mTextBaseline, pixelCoord + mMinSpacingVerticalLabels + labelSize ), label );
}
//draw small divisions
drawSmallDivisions( &p, beforePageCoord, numSmallDivisions, mmDisplay );
beforePageCoord -= mmDisplay;
}
//draw minor ticks marks which occur before first major tick
drawSmallDivisions( &p, beforePageCoord + mmDisplay, numSmallDivisions, -mmDisplay, startY );
}
double nextPageStartPos = 0;
int nextPageStartPixel = 0;
for ( int i = startPage; i <= endPage; ++i )
{
double pageCoord = 0; //page coordinate in mm
//total (composition) coordinate in mm, including space between pages
double totalCoord = currentPageY;
//position of next page
if ( i < endPage )
{
//not the last page
nextPageStartPos = currentPageY + layout->pageCollection()->page( i )->rect().height() + layout->pageCollection()->spaceBetweenPages();
nextPageStartPixel = mTransform.map( QPointF( 0, nextPageStartPos ) ).y();
}
else
{
//is the last page
nextPageStartPos = 0;
nextPageStartPixel = 0;
}
while ( ( totalCoord < nextPageStartPos ) || ( ( nextPageStartPos == 0 ) && ( totalCoord <= endY ) ) )
{
double pixelCoord = mTransform.map( QPointF( 0, totalCoord ) ).y();
p.drawLine( 0, pixelCoord, mRulerMinSize, pixelCoord );
//calc size of label
QString label = QString::number( pageCoord );
int labelSize = mRulerFontMetrics->width( label );
//draw label only if it fits in before start of next page
if ( ( pixelCoord + labelSize + 8 < nextPageStartPixel )
|| ( nextPageStartPixel == 0 ) )
{
drawRotatedText( &p, QPointF( mTextBaseline, pixelCoord + mMinSpacingVerticalLabels + labelSize ), label );
}
//draw small divisions
drawSmallDivisions( &p, totalCoord, numSmallDivisions, mmDisplay, nextPageStartPos );
pageCoord += mmDisplay;
totalCoord += mmDisplay;
}
if ( i < endPage )
currentPageY += layout->pageCollection()->page( i )->rect().height() + layout->pageCollection()->spaceBetweenPages();
}
break;
}
}
//draw current marker pos
drawMarkerPos( &p );
}
