/** * Draw labelled ticks on a line. Ticks are spaced according to a * maximum density. Miror ticks are not labelled. * * @param aGal the GAL to draw on * @param aOrigin start of line to draw ticks on * @param aLine line vector * @param aMinorTickLen length of minor ticks in IU */ void drawTicksAlongLine( KIGFX::GAL& aGal, const VECTOR2D& aOrigin, const VECTOR2D& aLine, double aMinorTickLen ) { VECTOR2D tickLine = aLine.Rotate( -M_PI_2 ); double tickSpace; TICK_FORMAT tickF = getTickFormatForScale( aGal.GetWorldScale(), tickSpace ); // number of ticks in whole ruler int numTicks = (int) std::ceil( aLine.EuclideanNorm() / tickSpace ); // work out which way up the tick labels go double labelAngle = -tickLine.Angle(); if( aLine.Angle() > 0 ) { aGal.SetHorizontalJustify( GR_TEXT_HJUSTIFY_LEFT ); } else { aGal.SetHorizontalJustify( GR_TEXT_HJUSTIFY_RIGHT ); labelAngle += M_PI; } // text and ticks are dimmed aGal.SetStrokeColor( PreviewOverlayDefaultColor().WithAlpha( PreviewOverlayDeemphAlpha( true ) ) ); const auto labelOffset = tickLine.Resize( aMinorTickLen * ( majorTickLengthFactor + 1 ) ); for( int i = 0; i < numTicks; ++i ) { const auto tickPos = aOrigin + aLine.Resize( tickSpace * i ); double length = aMinorTickLen; bool drawLabel = false; if( i % tickF.majorStep == 0) { drawLabel = true; length *= majorTickLengthFactor; } else if( tickF.midStep && i % tickF.midStep == 0 ) { drawLabel = true; length *= midTickLengthFactor; } aGal.DrawLine( tickPos, tickPos + tickLine.Resize( length ) ); if( drawLabel ) { wxString label = DimensionLabel( "", tickSpace * i, g_UserUnit ); // FIXME: spaces choke OpenGL lp:1668455 label.erase( std::remove( label.begin(), label.end(), ' ' ), label.end() ); aGal.BitmapText( label, tickPos + labelOffset, labelAngle ); } } }
void SIMPLE_OVERLAY_ITEM::setupGal( KIGFX::GAL& aGal ) const { // default impl: set up the GAL options we have - the // overriding class can add to this if needed aGal.SetLineWidth( m_lineWidth ); aGal.SetStrokeColor( m_strokeColor ); aGal.SetFillColor( m_fillColor ); aGal.SetIsStroke( true ); aGal.SetIsFill( true ); }