[Qt-interest] What's the deal with centralWidgets (Qmainwindow) and QLayouts

[Alexandre Beraud]

Hi,

Replace line:
    vbox_c0 = new QVBoxLayout(this);
with:
    vbox_c0 = new QVBoxLayout;

Regards,

Alex


S. Aguinaga a écrit :
>
> To design a central widget consisting of 3 vhboxlayouts what is the 
> right way to set the 
> layout?  I have tried using QVBoxes inside of QHBoxes, QGrids, an 
> GroupBoxes, and I get the same 
> error message when the window opens.  I'm sure I'm missing something 
> fundamental.
>
>
> I have widgets (pusbuttons, labels, &c. ) on 3 diff vboxes, then one 
> QHBoxLayout that I 
> want to add the vboxes, but I keep getting a warning when I run the 
> program I get:
>
> "QLayout: Attempting to add QLayout "" to ToneAudWindow "", which 
> already has a layout"
>
> and I haven't found a useful answer.
>
> [code]
> ToneWindow::ToneWindow() {  
>   createDockingPanels();  //these are fine
>   createCentralWidget();
> }
> void ToneWindow::createCentralWidget() {
>   QGroupBox   *groupBox = new QGroupBox(tr("G1"));
>     
>     freqLCD        = new QLCDNumber(5);
>     freqLCD->setSegmentStyle(QLCDNumber::Filled);
>     freqLCD->display( 400 );
>     vbox_c0 = new QVBoxLayout(this); // here I have only one Vertical 
> group box
>     vbox_c0->addWidget(new QLabel(tr("Frequency")));
>     vbox_c0->addWidget(freqLCD);
>     groupBox->setLayout(vbox_c0);
>     setCentralWidget(groupBox);
> }
> [/code]
>
> Reference: 
> http://lists.trolltech.com/qt-interest/2008-06/thread00514-0.html 
> <http://lists.trolltech.com/qt-interest/2008-06/thread00514-0.html>
>
> Please, any help will be appreciated.
>
> // Sal
>
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