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TechDraw: Fix font size issues when exporting to SVG

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This commit is contained in:
Tomas Pavlicek
2019-05-27 22:18:47 +02:00
committed by WandererFan
parent dd25a37b0f
commit 3e7249318f
15 changed files with 68 additions and 79 deletions
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26
src/Mod/TechDraw/Gui/QGCustomText.cpp
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@@ -131,32 +131,6 @@ void QGCustomText::paint ( QPainter * painter, const QStyleOptionGraphicsItem *
QStyleOptionGraphicsItem myOption(*option);
myOption.state &= ~QStyle::State_Selected;
//svg text is much larger than screen text. scene units(mm or 0.1mm in hirez) vs points.
//need to scale text if going to svg.
//TODO: magic translation happens. why? approx: right ~8mm down: 12mm + (3mm per mm of text height)
//SVG transform matrix translation values are different for same font size + different fonts (Sans vs Ubuntu vs Arial)???
// scale values are same for same font size + different fonts.
//calculate dots/mm
//in hirez - say factor = 10, we have 10 dpmm in scene space.
// so 254dpi / 72pts/in => 3.53 dppt
double dpmm = 3.53; //dots/pt
double svgMagicX = Rez::guiX(8.0); //8mm -> 80 gui dots
double svgMagicY = Rez::guiX(12.0);
double svgMagicYoffset = Rez::guiX(3.0); // 3mm per mm of font size => 30gunits / mm of font size
double fontSize = Rez::appX(font().pointSizeF()); //gui pts 4mm text * 10 scunits/mm = size 40 text but still only 4mm
double ty = svgMagicY + (svgMagicYoffset*fontSize)/dpmm;
// 12mm (in gunits) + [3mm (in gunits) * (# of mm)]/ [dots per mm] works out to dots?
QPointF svgMove(-svgMagicX/dpmm,ty);
QPaintDevice* hw = painter->device();
QSvgGenerator* svg = dynamic_cast<QSvgGenerator*>(hw);
if (svg) {
painter->scale(Rez::appX(dpmm),Rez::appX(dpmm));
painter->translate(svgMove);
} else {
painter->scale(1.0,1.0);
}
// painter->drawRect(boundingRect()); //good for debugging
setDefaultTextColor(m_colCurrent);