void QgsMapToolRotatePointSymbols::canvasPressOnFeature( QgsMapMouseEvent *e, const QgsFeature &feature, const QgsPointXY &snappedPoint )
{
//find out initial arrow direction
QVariant attrVal = feature.attribute( mCurrentRotationAttributes.toList().at( 0 ) );
mCurrentRotationFeature = attrVal.toDouble();
createPixmapItem( mMarkerSymbol.get() );
if ( mRotationItem )
{
mRotationItem->setPointLocation( snappedPoint );
}
mCurrentMouseAzimut = calculateAzimut( e->pos() );
setPixmapItemRotation( ( int )( mCurrentMouseAzimut ) );
mRotating = true;
}
void QgsMapToolRotatePointSymbols::canvasMoveEvent( QgsMapMouseEvent* e )
{
if ( !mRotating )
{
return;
}
double azimut = calculateAzimut( e->pos() );
double azimutDiff = azimut - mCurrentMouseAzimut;
//assign new feature rotation, making sure to respect the 0 - 360 degree range
mCurrentRotationFeature += azimutDiff;
if ( mCurrentRotationFeature < 0 )
{
mCurrentRotationFeature = 360 - mCurrentRotationFeature;
}
else if ( mCurrentRotationFeature >= 360 )
{
mCurrentRotationFeature -= 360;
}
mCurrentMouseAzimut = azimut;
if ( mCurrentMouseAzimut < 0 )
{
mCurrentMouseAzimut = 360 - mCurrentMouseAzimut;
}
else if ( mCurrentMouseAzimut >= 360 )
{
mCurrentMouseAzimut -= 360;
}
//if shift-modifier is pressed, round to 15 degrees
int displayValue;
if ( e->modifiers() & Qt::ControlModifier )
{
displayValue = roundTo15Degrees( mCurrentRotationFeature );
mCtrlPressed = true;
}
else
{
displayValue = ( int )( mCurrentRotationFeature );
mCtrlPressed = false;
}
setPixmapItemRotation( displayValue );
}
void QgsMapToolRotatePointSymbols::canvasPressEvent( QMouseEvent *e )
{
if ( !mCanvas )
{
return;
}
mActiveLayer = currentVectorLayer();
if ( !mActiveLayer )
{
notifyNotVectorLayer();
return;
}
if ( !mActiveLayer->isEditable() )
{
notifyNotEditableLayer();
return;
}
if ( mActiveLayer->geometryType() != QGis::Point )
{
return;
}
//find the closest feature to the pressed position
QgsMapCanvasSnapper canvasSnapper( mCanvas );
QList<QgsSnappingResult> snapResults;
if ( canvasSnapper.snapToCurrentLayer( e->pos(), snapResults, QgsSnapper::SnapToVertex, -1 ) != 0 || snapResults.size() < 1 )
{
QMessageBox::critical( 0, tr( "No point feature" ), tr( "No point feature was detected at the clicked position. Please click closer to the feature or enhance the search tolerance under Settings->Options->Digitizing->Serch radius for vertex edits" ) );
return; //error during snapping
}
mFeatureNumber = snapResults.at( 0 ).snappedAtGeometry;
//get list with renderer rotation attributes
if ( layerRotationAttributes( mActiveLayer, mCurrentRotationAttributes ) != 0 )
{
return;
}
if ( mCurrentRotationAttributes.size() < 1 )
{
QMessageBox::critical( 0, tr( "No rotation Attributes" ), tr( "The active point layer does not have a rotation attribute" ) );
return;
}
mSnappedPoint = toCanvasCoordinates( snapResults.at( 0 ).snappedVertex );
//find out initial arrow direction
QgsFeature pointFeature;
if ( !mActiveLayer->featureAtId( mFeatureNumber, pointFeature, false, true ) )
{
return;
}
const QgsAttributeMap pointFeatureAttributes = pointFeature.attributeMap();
const QgsAttributeMap::const_iterator attIt = pointFeatureAttributes.find( mCurrentRotationAttributes.at( 0 ) );
if ( attIt == pointFeatureAttributes.constEnd() )
{
return;
}
mCurrentRotationFeature = attIt.value().toDouble();
createPixmapItem( pointFeature );
if ( mRotationItem )
{
mRotationItem->setPointLocation( snapResults.at( 0 ).snappedVertex );
}
mCurrentMouseAzimut = calculateAzimut( e->pos() );
setPixmapItemRotation(( int )( mCurrentMouseAzimut ) );
mRotating = true;
}