> > Second issue: As you have already pointed out, the menu separator is > > not
> > displayed correctly. The same is true for math formulas. For instance,
> > create some simple math formula and then select it: The selection
> > background is shown _below_ the formula! Seems like some offset is
> > computed incorrectly. Do have any idea how to fix the problem in
> > cooperation with the kde-cygwin people?
>
> Jean-Marc suggests
> Seeing that menu separator is also badly drawn,
> I would suggest that there is a bug in the implementation
> of QPainter::drawPolyline in qt3/win32. It would be nice to
> find a test program that shows a bad behaviour, so that it
> can be fixed.
This doesn´t seem te be it. Any other suggestions?
I also looked at QPainter::drawPolyline(...) and I was a bit astonished by its complexity. The X Window function looks simple but the Windows port adds a lot of lines of codes. In particular, the following segment looks suspicious:
for (int i=1; i<npoints; i++) {
newX = pa[index+i].x();
newY = pa[index+i].y(); if ( y1 != newY && x1 != newX ) {
newX++; newY++;
}
else if ( y1 == newY ) newX++;
else if ( x1 == newX ) newY++; LineTo( hdc, newX, newY );
x1 = newX;
y1 = newY;
}Why is newX/Y first set to the initial X/Y coordinate and afterwards increased by 1 (!) depending on the number of points?
Anyway, I played a bit with LyX and I noticed that the LyX menu separator itself is drawn correctly, i.e. the polygon is drawn correctly and does not exceed the clip box. You can check this by adding a menu separator to an empty document or at the end of a document.
So there may be two possible reasons (please forgive me if I am telling non-sense; I am not a GUI expert).
1. The clip box itself is not set to the correct position.
2. QtFree/Win32 uses y coordinates in the wrong way because (just a guess!) X11 uses increasing y values from bottom to top whereas Win32 uses increasing y values from top to bottom. (Unfortunately, the menu separator symbol is symmetrical so we cannot exclude this alternative...)
Just some thoughts...
Happy new year, everybody! Michael
