Please look at the section source in
http://www.jsoftware.com/jwiki/Guides/Qt%20IDE
gl2 is implmemented in the file lib/wd/gl2.cpp
Пт, 31 май 2013, Henry Rich писал(а):
> You might be right there. The lines between the rects seem to be a
> darker version of the rectangle color. I have set the pen to null -
> perhaps that is not being handled properly.
>
> Can you point me to the Qt C++ source?
>
> Henry Rich
>
> On 5/31/2013 10:16 PM, bill lam wrote:
> >This is the definition of glrect in gl2:
> >
> >glrect x y w h ; draw rectangle with pen and brush
> >
> >This is its implementation in Qt C++
> >
> >int glrect (const int *p)
> >{
> > if (!isigraph) return 1;
> > Isigraph2 *w = (Isigraph2 *)isigraph->widget;
> > if (!w->painter) return 1;
> > if (!w->painter->isActive()) return 1;
> > w->painter->drawRect (*(p), *(p + 1), *(p + 2), *(p + 3));
> > return 0;
> >}
> >
> >This is from Qt documentation
> >
> >void QPainter::drawRect ( int x, int y, int width, int height )
> >
> >This is an overloaded function.
> >
> >Draws a rectangle with upper left corner at (x, y) and with the
> >given width and height.
> >
> >
> >So that I think the current glrect implementation is correct.
> >The issue you got might be related to pen and brush.
> >
> >Пт, 31 май 2013, Henry Rich писал(а):
> >>OK.
> >>
> >>A series of rectangles with the same y values and adjoining in x,
> >>such that x+w of one = x of the next, do not abut smoothly.
> >>
> >>I don't know how Qt describes rectangles: is it xywh or tlbr? But
> >>somehow the gl2 definition leaves gaps when drawn in Qt.
> >>
> >>Henry Rich
> >>
> >>On 5/31/2013 7:35 PM, chris burke wrote:
> >>>In general, we want things to work the way Qt works. That is simplest for
> >>>us, and the best way forward.
> >>>
> >>>If a discrepancy between J6 and J8 arises because of the way we have coded
> >>>it, then we will fix it, but not if it arises because Qt differs from J6
> >>>jwdw or jwdp.
> >>>
> >>>On Sat, Jun 1, 2013 at 7:18 AM, Henry Rich <[email protected]> wrote:
> >>>
> >>>>Try loading the dissect package (just released) in J6 and J8, and see the
> >>>>differences. In particular, look at the sentence display at the top of
> >>>>the
> >>>>graphics window - in J8 it shows rectangle boundaries.
> >>>>
> >>>>Also, see how the display of shape and rank information (above the
> >>>>results) seems to be uncentered in the rectangle.
> >>>>
> >>>>Also, the Arial font seems to size differently in J8 than in J6.
> >>>>
> >>>>Do you agree that the graphics should look the same between J6 and J8? If
> >>>>so, I will work on characterizing the differences.
> >>>>
> >>>>Remember to upgrade your grid before installing dissect.
> >>>>
> >>>>Henry Rich
> >>>>
> >>>>
> >>>>On 5/31/2013 7:10 PM, bill lam wrote:
> >>>>
> >>>>>Reactively, I suspect that the way how Qt works. Please
> >>>>>provide simple script and screen shots to illustrate the
> >>>>>differences.
> >>>>>
> >>>>>Пт, 31 май 2013, Henry Rich писал(а):
> >>>>>
> >>>>>>gl2 for J8 has a number of incompatibilities with J6, and also just
> >>>>>>seems a pixel off in some cases. Since there will be graphics
> >>>>>>applications used on both J6 and J8 for a while yet, it seems to me
> >>>>>>that J8 ought to do things the J6 way when there is no reason not to.
> >>>>>>
> >>>>>>What I have found so far:
> >>>>>>
> >>>>>>0. glarc seems to go CW around the ellipse; J6 went CCW
> >>>>>>
> >>>>>>1. drawing abutting rectangles, with the same color and no pen,
> >>>>>>should leave a smooth field; in J8 there are visible joints
> >>>>>>
> >>>>>>2. drawing text inside a box, the text seems to be shifted one pixel
> >>>>>>to the left. Or maybe the box is one pixel to the right.
> >>>>>>
> >>>>>>3. When I draw a box with a pen just inside the wdclip rectangle,
> >>>>>>the right and bottom are chopped off. In J6 the cliprect was already
> >>>>>>one row/col too short; j8 is even shorter. This may be related to
> >>>>>>item 2.
> >>>>>>
> >>>>>>This weekend I will release a graphics application for J6 and J8. It
> >>>>>>formats properly on J6, and exhibits pixel problems on J8.
> >>>>>>
> >>>>>>Henry Rich
> >>>>>>------------------------------**------------------------------**
> >>>>>>----------
> >>>>>>For information about J forums see
> >>>>>>http://www.jsoftware.com/**forums.htm<http://www.jsoftware.com/forums.htm>
> >>>>>>
> >>>>>
> >>>>> ------------------------------**------------------------------**
> >>>>----------
> >>>>For information about J forums see
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> >>>>
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> >>>
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