[Qt-interest] How to adjust the size of window with different screens or resolution rate?

[Ross Driedger]

On Mon, 16 Nov 2009 23:33:49 -0500, <qt-interest-request at trolltech.com>  
wrote:

> Message: 1
> Date: Tue, 17 Nov 2009 11:17:24 +0800 (CST)
> From: donglongchao <donglongchao at 163.com>
> Subject: [Qt-interest] How to adjust the size of window with different
> 	screens or resolution rate?
> To: "Qt Devel" <qt-interest at trolltech.com>
> Message-ID:
> 	<13212095.107601258427844482.JavaMail.coremail at bj163app27.163.com>
> Content-Type: text/plain; charset="gbk"
> Hi all,
> I am developing an GUI app with a 17" CRT screen whose resolution rate  
> is 800*600 and it looks fine when I run it.But when I try to run it with  
> a different screen that is a 22" LCD wide screen(resolution is  
> 1024*800),the app looks very small and ugly and it can only cover 1/3 of  
> the whole screen.So I want to know if there is any way to adjust the  
> size of window with different screens?Any suggestion is appreciated.
> Thanks a lot in advance.
> Longchao

This is what I do in the context of multiheaded displays:

The QRect object will return the size of each monitor attached.

     QDesktopWidget* dtw = QApplication::desktop();
     int screens =  dtw->numScreens();
     QRect rect;
     for(int nscreens = 0; nscreens < screens; ++nscreens)
     {
         QWidget* screen = dtw->screen(nscreens);
         rect = screen -> geometry();

     }

In another application, I needed my main window to fill the whole screen  
minus any system elements like the menu bar, so this code is called in the  
window's constructor:


     QDesktopWidget qdw;
     QRect rect = qdw.availableGeometry(this);
     QStyle* style = static_cast<const  
QApplication*>(QApplication::instance())->style();
     setFixedSize(QSize(rect.width(), rect.height() -   
style->pixelMetric(QStyle::PM_TitleBarHeight)));
     move(0, 0);

Set your window size an placement as you wish.


Ross

-- 

"Sometimes I think the surest sign that intelligent life exists elsewhere  
in the universe is that none of it has tried to contact us."
Bill Waterson (Calvin & Hobbes)


Ross Driedger
ross_at_earz.ca