On Saturday 27 December 2008, Marcos Dione wrote: > hi all. I'm set to get the panel spacer to its previous behaviour > when set to auto stretch, that is, to use as much space as possible. > > now, the code is simple: it takes the size of the container (if it's > an horizontal panel, it takes the width), then loops through all the > applets/plasmoids on it and substracts its preferred size. whatever is > left is used as a reference maximumSize (in this case, width). eeew, this thing shouldn't be needed at all, only thing needed should be an expanding horizontal size policy (see the QGraphicsWidget::setSizePolicy() Qt docs)
> actually, what it really does is this: it sets the minimumSize to > the min between this and the previous minSize (begins at 16 or so). if > it's not auto stretching, is sets the maxSize to the same value, > obiously forcing it to be of that size. if it is, it sets the maxSize to > -1. I guess this value means something special, but QGraphicsWidget API > (actually QGraphicslayoutitem[1]) says nothing about it. > > with this code and in my config the spacer takes some 130px, while > the systray takes 490px having only 190px of icons inside, and the 3 > digital clocks arte wider that needed[2]. if I turn off that auto > stretching, it goes down to the original 16px, but if I use the slider > to effectively increase the minSize, it goes up to 710px. > > suspecting those -1, I modified the code to set the maxSize to the > reference maxSize calculated as above, and it still is doesn't stretch. > seems like the only way to get some space in the panel is asking in some > forced way (by setting the minSize), instead of setting a min and a max > and letting the panel to guess the right one... maybe is it because the > other applets also ask for as much space as possible? I think plasma is > either reinventing the layout code that already exists in QT or the > applets are not behaving as they should. > > also, and finishind this longish mail, wehre does the preferredSize > come from? is it calculated? and last but not least, is there really > pretty pretty please some docs about this, including how > constraintsEvent() works/should work? I loked in plasmas' site and wiki > to no avail. sebas sent me to read the API but didn't find anything > conclusive. eeeh, not much documentation actually :/ yes, the most complete is from the api, in applet.h and plasma.h, where constraints are enumerated for the preferred/minimum/max sizes doc, look at qt documentation, in qgraphicslayoutitem and qgraphicswidget classes docs cheers, Marco Martin > > cheers, > > Marcos. > > -- > [1] http://doc.trolltech.com/4.4/qgraphicslayoutitem.html#setMinimumWidth > > [2] > http://grulicueva.homelinux.net/~mdione/gallerpy/index.py/pictures/sshots/p >lasma_panel-spacer_does_not_grow.png -- > (Not so) Random fortune: > - The human psyche is an odd and contradictory thing, isn't it Bob... > - Well... being a lawyer, I pretty much bunk on it. > -- http://www.ucomics.com/nonsequitur/viewnq.htm > _______________________________________________ > Plasma-devel mailing list > Plasma-devel@kde.org > https://mail.kde.org/mailman/listinfo/plasma-devel _______________________________________________ Plasma-devel mailing list Plasma-devel@kde.org https://mail.kde.org/mailman/listinfo/plasma-devel
