QgsRenderContext QgsRenderContext::fromMapSettings( const QgsMapSettings &mapSettings )
{
QgsRenderContext ctx;
ctx.setMapToPixel( mapSettings.mapToPixel() );
ctx.setExtent( mapSettings.visibleExtent() );
ctx.setFlag( DrawEditingInfo, mapSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
ctx.setFlag( ForceVectorOutput, mapSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
ctx.setFlag( UseAdvancedEffects, mapSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
ctx.setFlag( UseRenderingOptimization, mapSettings.testFlag( QgsMapSettings::UseRenderingOptimization ) );
ctx.setCoordinateTransform( QgsCoordinateTransform() );
ctx.setSelectionColor( mapSettings.selectionColor() );
ctx.setFlag( DrawSelection, mapSettings.testFlag( QgsMapSettings::DrawSelection ) );
ctx.setFlag( DrawSymbolBounds, mapSettings.testFlag( QgsMapSettings::DrawSymbolBounds ) );
ctx.setFlag( RenderMapTile, mapSettings.testFlag( QgsMapSettings::RenderMapTile ) );
ctx.setFlag( Antialiasing, mapSettings.testFlag( QgsMapSettings::Antialiasing ) );
ctx.setFlag( RenderPartialOutput, mapSettings.testFlag( QgsMapSettings::RenderPartialOutput ) );
ctx.setScaleFactor( mapSettings.outputDpi() / 25.4 ); // = pixels per mm
ctx.setRendererScale( mapSettings.scale() );
ctx.setExpressionContext( mapSettings.expressionContext() );
ctx.setSegmentationTolerance( mapSettings.segmentationTolerance() );
ctx.setSegmentationToleranceType( mapSettings.segmentationToleranceType() );
ctx.mDistanceArea.setSourceCrs( mapSettings.destinationCrs() );
ctx.mDistanceArea.setEllipsoid( mapSettings.ellipsoid() );
//this flag is only for stopping during the current rendering progress,
//so must be false at every new render operation
ctx.setRenderingStopped( false );
return ctx;
}
QgsMapSaveDialog::QgsMapSaveDialog( QWidget *parent, QgsMapCanvas *mapCanvas, const QList<QgsDecorationItem *> &decorations, const QList< QgsAnnotation *> &annotations, DialogType type )
: QDialog( parent )
, mDialogType( type )
, mMapCanvas( mapCanvas )
, mAnnotations( annotations )
{
setupUi( this );
// Use unrotated visible extent to insure output size and scale matches canvas
QgsMapSettings ms = mMapCanvas->mapSettings();
ms.setRotation( 0 );
mExtent = ms.visibleExtent();
mDpi = ms.outputDpi();
mSize = ms.outputSize();
mResolutionSpinBox->setValue( mDpi );
mExtentGroupBox->setOutputCrs( ms.destinationCrs() );
mExtentGroupBox->setCurrentExtent( mExtent, ms.destinationCrs() );
mExtentGroupBox->setOutputExtentFromCurrent();
mExtentGroupBox->setMapCanvas( mapCanvas );
mScaleWidget->setScale( ms.scale() );
mScaleWidget->setMapCanvas( mMapCanvas );
mScaleWidget->setShowCurrentScaleButton( true );
QString activeDecorations;
Q_FOREACH ( QgsDecorationItem *decoration, decorations )
{
mDecorations << decoration;
if ( activeDecorations.isEmpty() )
activeDecorations = decoration->name().toLower();
else
activeDecorations += QStringLiteral( ", %1" ).arg( decoration->name().toLower() );
}
QgsRenderContext QgsRenderContext::fromMapSettings( const QgsMapSettings& mapSettings )
{
QgsRenderContext ctx;
ctx.setMapToPixel( mapSettings.mapToPixel() );
ctx.setExtent( mapSettings.visibleExtent() );
ctx.setFlag( DrawEditingInfo, mapSettings.testFlag( QgsMapSettings::DrawEditingInfo ) );
ctx.setFlag( ForceVectorOutput, mapSettings.testFlag( QgsMapSettings::ForceVectorOutput ) );
ctx.setFlag( UseAdvancedEffects, mapSettings.testFlag( QgsMapSettings::UseAdvancedEffects ) );
ctx.setFlag( UseRenderingOptimization, mapSettings.testFlag( QgsMapSettings::UseRenderingOptimization ) );
ctx.setCoordinateTransform( nullptr );
ctx.setSelectionColor( mapSettings.selectionColor() );
ctx.setFlag( DrawSelection, mapSettings.testFlag( QgsMapSettings::DrawSelection ) );
ctx.setFlag( DrawSymbolBounds, mapSettings.testFlag( QgsMapSettings::DrawSymbolBounds ) );
ctx.setFlag( RenderMapTile, mapSettings.testFlag( QgsMapSettings::RenderMapTile ) );
ctx.setRasterScaleFactor( 1.0 );
ctx.setScaleFactor( mapSettings.outputDpi() / 25.4 ); // = pixels per mm
ctx.setRendererScale( mapSettings.scale() );
ctx.setExpressionContext( mapSettings.expressionContext() );
//this flag is only for stopping during the current rendering progress,
//so must be false at every new render operation
ctx.setRenderingStopped( false );
return ctx;
}
QgsMapRendererSequentialJob::QgsMapRendererSequentialJob( const QgsMapSettings& settings )
: QgsMapRendererQImageJob( settings )
, mInternalJob( nullptr )
, mPainter( nullptr )
, mLabelingResults( nullptr )
{
QgsDebugMsg( "SEQUENTIAL construct" );
mImage = QImage( mSettings.outputSize(), mSettings.outputImageFormat() );
mImage.setDotsPerMeterX( 1000 * settings.outputDpi() / 25.4 );
mImage.setDotsPerMeterY( 1000 * settings.outputDpi() / 25.4 );
mImage.fill( Qt::transparent );
}
void QgsDecorationNorthArrow::render( const QgsMapSettings &mapSettings, QgsRenderContext &context )
{
if ( !enabled() )
return;
double maxLength = mSize * mapSettings.outputDpi() / 25.4;
QSvgRenderer svg;
const QByteArray &svgContent = QgsApplication::svgCache()->svgContent( svgPath(), maxLength, mColor, mOutlineColor, 1.0, 1.0 );
svg.load( svgContent );
if ( svg.isValid() )
{
QSize size( maxLength, maxLength );
QRectF viewBox = svg.viewBoxF();
if ( viewBox.height() > viewBox.width() )
{
size.setWidth( maxLength * viewBox.width() / viewBox.height() );
}
else
{
size.setHeight( maxLength * viewBox.height() / viewBox.width() );
}
double centerXDouble = size.width() / 2.0;
double centerYDouble = size.height() / 2.0;
//save the current canvas rotation
context.painter()->save();
//
//work out how to shift the image so that it rotates
// properly about its center
//(x cos a + y sin a - x, -x sin a + y cos a - y)
//
// could move this call to somewhere else so that it is only
// called when the projection or map extent changes
if ( mAutomatic )
{
try
{
mRotationInt = QgsBearingUtils:: bearingTrueNorth( mapSettings.destinationCrs(), mapSettings.transformContext(), context.extent().center() );
}
catch ( QgsException & )
{
mRotationInt = 0.0;
}
mRotationInt += mapSettings.rotation();
}
double radiansDouble = mRotationInt * M_PI / 180.0;
int xShift = static_cast<int>( (
( centerXDouble * std::cos( radiansDouble ) ) +
( centerYDouble * std::sin( radiansDouble ) )
) - centerXDouble );
int yShift = static_cast<int>( (
( -centerXDouble * std::sin( radiansDouble ) ) +
( centerYDouble * std::cos( radiansDouble ) )
) - centerYDouble );
// need width/height of paint device
int deviceHeight = context.painter()->device()->height();
int deviceWidth = context.painter()->device()->width();
// Set margin according to selected units
int xOffset = 0;
int yOffset = 0;
switch ( mMarginUnit )
{
case QgsUnitTypes::RenderMillimeters:
{
int pixelsInchX = context.painter()->device()->logicalDpiX();
int pixelsInchY = context.painter()->device()->logicalDpiY();
xOffset = pixelsInchX * INCHES_TO_MM * mMarginHorizontal;
yOffset = pixelsInchY * INCHES_TO_MM * mMarginVertical;
break;
}
case QgsUnitTypes::RenderPixels:
xOffset = mMarginHorizontal - 5; // Minus 5 to shift tight into corner
yOffset = mMarginVertical - 5;
break;
case QgsUnitTypes::RenderPercentage:
xOffset = ( ( deviceWidth - size.width() ) / 100. ) * mMarginHorizontal;
yOffset = ( ( deviceHeight - size.width() ) / 100. ) * mMarginVertical;
break;
case QgsUnitTypes::RenderMapUnits:
case QgsUnitTypes::RenderPoints:
case QgsUnitTypes::RenderInches:
case QgsUnitTypes::RenderUnknownUnit:
case QgsUnitTypes::RenderMetersInMapUnits:
break;
}
//Determine placement of label from form combo box
switch ( mPlacement )
{
case BottomLeft:
context.painter()->translate( xOffset, deviceHeight - yOffset - maxLength + ( maxLength - size.height() ) / 2 );
break;
case TopLeft:
context.painter()->translate( xOffset, yOffset );
break;
case TopRight:
context.painter()->translate( deviceWidth - xOffset - maxLength + ( maxLength - size.width() ) / 2, yOffset );
break;
case BottomRight:
context.painter()->translate( deviceWidth - xOffset - maxLength + ( maxLength - size.width() ) / 2,
deviceHeight - yOffset - maxLength + ( maxLength - size.height() ) / 2 );
break;
}
//rotate the canvas by the north arrow rotation amount
context.painter()->rotate( mRotationInt );
//Now we can actually do the drawing, and draw a smooth north arrow even when rotated
context.painter()->translate( xShift, yShift );
svg.render( context.painter(), QRectF( 0, 0, size.width(), size.height() ) );
//unrotate the canvas again
context.painter()->restore();
}
}
