qt - QGridLayout, 3 panes, not expanding properly -

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i'm trying layout window (all in code) qgridlayout. can add widgets layout , display in window, can't figure out how resize them properly. here's i'd like

[leftmost][--------center---------][rightmost]

those 3 "panes" of window (all 3 of them lists). left , right ones should of static width , hug respective sides, , center should expand fill width window grows (or shrinks).

some code:

// create subviews, add them grid layout, , set layout window. qtableview *list = new qtableview(0); list->setsizepolicy(qsizepolicy::expanding, qsizepolicy::expanding); qtableview *flashlist = new qtableview(0); flashlist->setsizepolicy(qsizepolicy::expanding, qsizepolicy::expanding);  qpushbutton *infobutton = new qpushbutton("info!"); qpushbutton *flashfeedsbutton = new qpushbutton("flashfeeds");  qgridlayout *gridlayout = new qgridlayout;    // set minimum widths 3 columns of grid gridlayout->setcolumnminimumwidth(gridcolumnfirst, 300); gridlayout->setcolumnminimumwidth(gridcolumnsecond, 300); gridlayout->setcolumnminimumwidth(gridcolumnthird, 300);  // set minimum heights rows of grid int headerfooterheight = 44; gridlayout->setrowminimumheight(gridrowfirst, headerfooterheight); gridlayout->setrowminimumheight(gridrowsecond, 200); gridlayout->setrowminimumheight(gridrowthird, headerfooterheight);   // set stretch factors gridlayout->setcolumnstretch(gridcolumnfirst, 1); gridlayout->setcolumnstretch(gridcolumnfirst, 2); gridlayout->setcolumnstretch(gridcolumnthird, 1);  gridlayout->addwidget(list, 1, 0, qt::alignleft); gridlayout->addwidget(flashlist, 1, 1, qt::aligncenter); gridlayout->addwidget(infobutton, 0, 3, qt::alignright); gridlayout->addwidget(flashfeedsbutton, 0, 1, qt::alignleft);  _mainwindow->setlayout(gridlayout);

(as might able tell, going 9x9 grid, point remains, i'm trying middle row (gridrowsecond) have stretchy columns).

the rows expand fine. problem seems getting widgets @ each cell expand take containing space. how do this? (also, vertically, list expanding properly, not horizontally).

look @ docs on qgridlayout::addwidget:

the default alignment 0, means widget fills entire cell.

but have following:

gridlayout->addwidget(list, 1, 0, qt::alignleft); gridlayout->addwidget(flashlist, 1, 1, qt::aligncenter); gridlayout->addwidget(infobutton, 0, 3, qt::alignright); gridlayout->addwidget(flashfeedsbutton, 0, 1, qt::alignleft);

thus, you've told grid layout want widget aligned left, center, right, , left of cells, respectively. in case want use default alignment allowing widgets fill cells , follow own respective size policies.


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