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
> >>http://www.jsoftware.com/**forums.htm<http://www.jsoftware.com/forums.htm>
> >>
> >----------------------------------------------------------------------
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> >
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